radio communication system, radio terminal, radio station, server for administration and maintenance

专利摘要:
  RADIO COMMUNICATION SYSTEM, RADIO TERMINAL, RADIO STATION, ADMINISTRATION AND MAINTENANCE SERVEROPERATION AND RADIO COMMUNICATION METHODA system and method are provided that allow the identification of a cause of failure in radio coverage detected by a radio terminal (EU) on one side of the radio network, and that allow the determination and execution of a countermeasure in response to a identification result. The radio terminal (EU), which acquires measurement instruction information from a radio station, measures and records according to the measurement instruction information, and reports to the radio station. The radio terminal, in the event of a first condition in the selection or detection of a first cell (cell allowed) in which the radio terminal is allowed to be serviced for a predetermined service to be satisfied, records information about a second cell (cell not allowed) in which the radio terminal is not allowed to be serviced for the predetermined service.
公开号:BR112013007507A2
申请号:R112013007507-4
申请日:2011-09-30
公开日:2020-10-27
发明作者:Hisashi Futaki
申请人:Nec Corporation；
IPC主号:

专利说明:

CCC oo SS COP PÉS OS UT AS DM "ee - & BR. 1" RADIO COMMUNICATION SYSTEM, RADIO TERMINAL, RADIO STATION, OPERATION ADMINISTRATION AND MANAGEMENT SERVER AND RADIO COMMUNICATION METHOD "1 technical '5 This patent application claims priority from Japanese patent application No. JP2010-224388 (filed on October 1, 2010), the content of which is incorporated herein in its entirety by reference in this specification.
The present invention relates to a - - communication system, and in particular one with a preferable system, method, and device, to be applied to a system that adjusts a radio parameter or similar, based on measurement performed on one terminal side. radio.
Prior art Radio coverage information is important in network planning, network optimization, optimization of radio resource management parameters (Radio Resource Management: RRM) and the like (Non-Patent Literature 1) and a trigger test it is performed by an operator to detect coverage problems within a network, such as a coverage hole, pilot pollution and the like.
In 3GPP (3rd Generation Partnership Project), to reduce operating expenses (OPEX) incurred in a drive test | by an operator, the use of a radio terminal (User Equipment: EU) for measuring and reporting such information that was collected by the drive test or a. similar information is being studied (Literature No. | 30 Patent 1). i. <MDT> A final objective of the study mentioned above is to minimize the execution of actuation tests (Minimization of Actuation Tests: abbreviated as “MDT”). In MDT studies, the following is being discussed: - how a radio terminal is produced to perform measurement; and
- how a radio terminal is produced to report a record of measurement results or past measurement results; where “metering” includes not only K channel quality measurement, but also operations to “detect” a certain specific situation, such as a radio coverage problem.
A radio network to which the radio terminal (EU) reports - includes a base station (E-) UTRAN ((e) Node B), or a base station control station UTRAN (Radio Network Controller: RNC), or similar. An E-UTRAN and NB base station include some functions of an RNC that manages radio resources and a base station Node B that terminates a radio interface on a UTRAN. An eNÓóB E-UTRAN or a NÓB UTRAN and RNC are denoted as “eNnB / RNC” in this specification. (E-) UTRAN: UMTS (-Evolved) (Universal Mobile Telecommunications System) Terrestrial Radio Access Network) eNÓóB: Node B evolved (eNB) <MDT Registered [“Logged”]> At present (when depositing the present patent application), in a measurement mode specified in the Non-Patent Literature 2 specification, there is a method (Registered MDT) in which a radio terminal (EU) is produced to perform measurement while in an idle mode it is produced to report a measurement result for a radio network while in an active mode. In the following, as a premise for understanding the present invention, an outline of Registered MDT is that described, based on the specification of Non-Patent Literature 30 Patent 2 and the like.
* Idle mode is an ON power supply mode such as when the radio terminal (EU) is in standby mode or similar, and is referred to as a mode in which an RRC (Radio Resource Control) connection is not established (Non-Patent Literature 8). Idle mode indicates RRC IDDLE (Idle Radio Resource Control) in LTE (Long Term Evolution) and UTRAN IDLE in UMTS
ESSA 3 (Universal Mobile Telecommunications System). When the radio terminal (EU) is in idle mode, management as to which cell serving radio terminal 4 (EU) is in, is not performed. In LTE, management is performed as to which Tracking Area (TA) the * radio terminal (EU) encamps (the TA is managed by an MME (Mobility Management Entity) or similar), and in UMTS, the management is performed as to which Location Area (LA) or Routing Area (RA) the radio terminal (EU) encamps (the LA or Ra is managed by an MSC (Mobile Switching Center) / VLR (Location Record) Visitor)). It should be noted that in 3GPP, UMTS a CELL PCH or URA PCH state can be considered a target for a Registered MDT. The following describes Registered MDT focusing in an idle mode, but the basic situation is similar also for CELL PCH or URA PCH.
A radio base station / base station control station (eNB / RNC) of an (E-) UTRAN instructs a radio terminal (EU) in an active mode to perform measurement in an idle mode and record measurement results (record ). That is, the radio base station / base station control station (eNB / RNC) of an (E-) UTRAN transmits an Idle MDT configuration message including a Registered MDT configuration parameter executed: by a radio (EU) in an idle mode to the radio terminal (EU) (Non-Patent Literature 2). (This is a general term for UMTS / LTE, and in case of focusing on 'LTE, it can also be called “S 30 Record Idle Configuration message”). jU After transitioning from an active mode to an idle mode, The radio terminal (EU) performs measurement and recording in idle mode, according to an instruction from (E-JUTRAN. Here, a cell that is a target for measurement is basically the same as a UE in a normal idle mode. That is, the measurement and a Registered MDT follow the measurement principle in a radio terminal's idle mode
(I). (Non-Patent Literature 4, 5) Basically, a target for measurement is: HA - a cell included in a list of neighboring cells, - a cell in addition to a list of neighboring cells and detected by an EU (a detected cell). - A non-target for measurement is: - a cell on a black list, "—- a CSG cell (Closed Subscriber Group) when -" PCI / PSC divides "is applied to distinguish a CSG cell and an Open cell, for example physical cell identification information (PCI / PSC) (applicable to a radio terminal (EU) that is a non-member of CSG, having no functionality / authority belonging to a CSG cell). It should be noted that the blacklist is a cell list that is used to prevent the radio terminal from performing measurement (quality measurement) of a specific neighbor cell in the list.
A CSG cell restricts connections to a radio terminal (EU) of a specific group, such as the owner of a femto base station (Femto (e) NB or (e) Domestic NB) or your family, for example.
Therefore, an open cell is a cell that all EUs of an operator can use, only specific radio terminals (EUs) can use CSG, and a hybrid cell is a mixture of open cells and CSG. <Cover hole> It is under study that in case of a radio terminal (EU) to be camped in a cover hole, the radio terminal (EU) performs registration as “Out of Service” (OOS) (out * of area of operation), instead of recording measurement results from a serving cell or neighboring cell (Non-Patent Literature 3). On the other hand, it is also under study that in case a radio terminal (EU) is camped in a cover hole, the radio terminal (EU) continues to measure MDT and Record only for a specific period of time (for example, while a terminal is in a “camped - normally” state) and suspend MDT and Record measurement, in case the radio terminal remains | 1 camped in a cover hole even after the specified 5-time period has elapsed (for example, while the terminal is in a “cell-selectable” or “cell-encoded” state)) (Non-Patent Literature | 2) . In a case where when the radio terminal returns À back to a “normally camped” state, a Idle MDT Configuration is valid, the radio terminal restarts MDT measurement and Registration.
Here, a cover hole is an area in which SNR (Signal to Noise Ratio) or SINR (Signal to Interference and Noise Ratio) of an answering cell or a neighboring cell for which answering (connection, also referred to as “establishment of a radio link ”) is allowed to perform a predetermined service, is less than a predefined value needed to maintain basic service (establish a SRB (Signaling radio bearer), and acquires information to be sent through channels DL (common downlink channels). Here, the SRB is a carrier for executing an RRC (Radio Resource Control) message, which is a control message.
As for a point in time when a radio terminal (EU) determines a coverage hole, the following can be mentioned as examples: - a case where it is not possible to select a cell in the. which the radio terminal (EU) is allowed to be serviced to perform a predetermined service during when the * radio terminal (EU) is in a "normally encamped" state (transmission (or location) of information "cannot be acquired), - a case where it is not possible to select a cell in which the radio terminal (EU) is allowed to be served during when the radio terminal (EU) is in a 'select any cell' state,
the MM | i - a case where it is not possible to select a cell in which the radio terminal (EU) is allowed to be serviced to perform a predetermined service during when the> radio terminal (EU) is in a state “camped in any cell".
7 In the present specification, it is assumed as an example that a cover hole is determined in a case where it is not possible to select a cell in which a radio terminal (EU) is allowed to be serviced to perform a predetermined service during when the radio terminal (EU) is in a “normally camped” state. <Allowed cell / Radio base station> A cell / radio base station in which a terminal is allowed to establish a radio link with the radio base station to perform a predetermined service, is called an allowed cell / radio base station radio in this specification. Conversely, a cell / radio base station in which a terminal is not allowed to establish a radio link with the radio base station to perform a predetermined service, but it is: allowed to be answered only to receive a restricted service, and / or, a cell / radio base station in which a terminal is inhibited from being serviced, is called a "cell / radio base station not allowed" in the present. 25 specification. The latter, for example, corresponds to a - cell -CSG for a nonmember.
A radio terminal (EU) for which a Registered MDT is configured performs measurement in an idle mode, notifies - a (E-) JUTRAN that the radio terminal (EU) maintains a record, at a point in time when the terminal radio 7 (EU) goes into an active mode and establishes an RRC connection, and responsive to an instruction to report the record from the (E-) UTRAN, makes a report.
A radio terminal (EU), which is produced from a radio network side to perform MDT measurement and recording in an idle mode, using 1 bit in a complete connection message (RRC CONNECTION Setup Complete), for
For example, in an instant of establishing an RRC connection in a transition to the radio network side an MDT measurement result is available.
The radio network | * retrieves a record of measurement results based on the 4, 5 indication.
For example, a radio base station (eNÓB:, eNB) from E-UTRAN transmits an EU Information Request to the radio terminal (EU) to perform recovery | record (collection) and the radio terminal (EU) reports an Rm record of the measurement results as an EU Information Response.
Therefore, it is possible for a (e) NÓóB / RNC or a higher network server (Core Network: abbreviated as "CN", or Operation Administration and Maintenance: abbreviated as "OAM") to understand a coverage problem.
Retrieving a record (measurement result) maintained by a radio terminal (EU) from the network, and reporting the maintained record (measurement result) from the radio terminal is referred to as record retrieval (collection), at present specification.
Below, an LTE system is assumed, and using figure 22, an example of radio terminal (EU) operations is given.
The radio terminal (EU) that receives an instruction to perform the periodic measurement of a Registered MDT, from an eNÓóB in LTE, goes into a -ocious mode (RRC IDLE) at time t = tO0. At this moment the radio terminal (EU) is assumed to be camping in cell 1. At time t = tO0O, the radio terminal (EU) executes the. recording of measurement results (RSRP and / or RSRQO) of the cell serving 1 and neighboring cell 2.. At t = tl, the radio terminal (EU) cannot select a connectable cell for a pre-defined period of time, and detects a cover hole to suspend the measurement.
After that, while in a stage where a "35 connectable cell cannot be selected, instead of a measurement result, the recording of" OOS "" (out of service) can be performed.
In a case where it is possible to t
It is 8 to select cell 1 again Or “another pluggable cell, the radio terminal (EU) restarts the MDT measurement. * The radio terminal (EU) moves to cell 2 in an idle mode, and & at t = t2 performs the recording of measurement results from cell 2 (answering cell) and neighbor cell 1. At t = t3, the terminal radio (EU) goes into an active mode (RRC CONNECTED), and reports the record held by the radio terminal (EU) to cell 2 eNÓóB2 base station. Thus, in a case where the EU detects a cover hole, reporting the quality received until the hole is detected or the fact (OOS) that there is a coverage hole for eNÓóB, it is possible to execute a required solution such as coverage optimization, based on the relevant fact, by eNóB or a network server level higher than the OAM. List of citations [NPL 1] 3GPP TR36.805 v9.0.0 (Internet <http://www.3gpp.org/FTP/Specs/html- info / 36805.htm>) - (NPL 2) R2-105238 (3GPP TS37.320 v1.0.0 (2010-08)) (Internet <http://3gpp.org/FTP/tsg ran / WG2 RL2 / TSGR2 71 / Docs / R2- 105238 .2z2ip>) [NPL 3] R2-103942 r (Internet <http://3gpp.org/FIP/tsg ran / WG2 RL2 / TSGR2 70bis / Docs / R2-
103942.zip>) i [NEL 4) 3GPP TS25.133 v4.0.0 (2001-03) (Internet: <http: // www. 3gpp.org/FIP/Specs/archive/25 series / 25.133 / 2
5133-400 .zip>) [NPL 5] 3GPP TS36.133 v9.4.0 (2010-06) * (Internet <http://www.3gpp.org/ftp/Specs/archive/36 series / 36.133 / 3 º 6133-940.zip>) [NPL 6] 3GPP TS36.304 v9.3.0 (Internet .-. <Http://www.3gpp.org/ftp/Specs/html- info / 36304.htm>) [NPL 7 ] 3GPP TS36.300 v9.3.0 (Internet <http://www.3gpp.org/ftp/Specs/html- info / 36300.htm>) [NPL 8) 3GPP TS21.905 v9.4.0 (Internet <http: //www.3gpp.org/ftp/Specs/html- info / 21905.htm>) Summary of the invention Problem to be solved by the invention 'The results of a problem analysis in related technology are as dry.
In related technology, a determination by a radio terminal (EU) as to whether or not a cover hole exists, targets only one permitted cell / eNodeB.
Consequently, in the case of a determination of a coverage hole, the information understood on one side of the radio network is that “there is no cell allowed”. . However, even in a case where the EU determines that a coverage hole exists, the quality received from a * downlink pilot signal from all radio base stations in the neighborhood is not necessarily below a value required to perform service basic (and therefore it is not possible to establish an SRB or acquire system information). For example, there may be a situation in which “there is no cell allowed but there is a cell not allowed”,
that is, a case where the quality received from an unallowed cell is greater than or equal to a pre-defined value, but the radio terminal is not able to be answered by the cell.
Specifically, in the following three cases, for example, the situation described above is assumed to occur. 1 Case 1) As shown in figure 23A, in a heterogeneous network (HetNet) including a macro cell and a CSG cell, rr: when a radio terminal (EU) is inside the non-member CSG cell through which the radio terminal ( EU) is not allowed to be serviced (connected to) or at a limit of the macro cell and the non-member CSG cell.
It should be noted that instead of the macro cell, the same applies to a micro cell or a peak cell.
In the present specification, as a typical example, the descriptions focus on a macro cell.
Case 2) As shown in figure 23B, when a radio terminal (EU) is on a boundary with a blacklist cell by which the radio terminal (EU) is not allowed to be serviced (connected to) (for example, a river, an enclave of upper floors of a building, or similar). Case 3) When a radio terminal (EU) is at a limit with an exception cell in which answering (connection) is prohibited to the radio terminal (EU) or inside the exception cell.
Thus, causes for a cover hole differ from. according to the situations. | 30 In existing related technologies, the causes for a coverage hole cannot be distinguished on one side of the radio network.
That is, even if a report of a measurement result in an instant when a cover hole is detected, or a report (OOS) of detection by a radio cover hole hole, is received from the radio terminal , the radio network side cannot understand a situation (specifically,
cases 1 and 2 mentioned above) “there is no cell allowed but there is a cell not allowed”. That is, the radio network side cannot correctly identify to. cause for a cover hole.
Consequently, it can be uniformly determined that: the cause for a cover hole, for example, is a macro cell cover problem, and a method for - dealing with the cover hole can be decided and executed.
As a result, an adverse situation occurs where improper handling of the cover hole is performed on the radio network side, and a coverage problem due to intercellular interference cannot be resolved.
Consequently, it is an objective of the present invention to provide a system, method, and device that allows the identification of the cause of defect in radio coverage detected by a radio terminal (EU) on one side of the radio network.
Solution to the problem To solve the problem above, the present invention is outlined as in the following configuration.
According to the present invention, a radio communication system is provided, whereby a radio terminal, by acquiring measurement instruction information from a radio station, performs measurement and recording according to the measurement instruction information. , and reports to the radio station, the “radio terminal comprising:. - a measurement execution unit which, when discovering that a first condition in the selection or detection of a first cell in which the radio terminal is allowed to be serviced for a predetermined service, is satisfied, and a second condition in the measurement or register is satisfied, it registers information in a second cell in which the terminal is not allowed to be served for the predetermined service.
According to the present invention, a radio terminal is provided that receives measurement instruction information transmitted from a radio station and performs measurement and recording according to the "measurement instruction" information, the radio terminal comprising: a measurement execution unit which, in the event of a first condition in the selection or detection of a first cell in which the terminal is allowed to be serviced for a predetermined service to be met, and a second condition in the measurement or record is met , records information in a second cell in which the terminal is not allowed to be serviced for the predetermined service.
In accordance with the present invention, a radio station of a radio communication system is provided, where a radio terminal that receives measurement instruction information from the radio station performs measurement and recording according to the instruction instruction information. measurement, and in case of a first condition in the selection or detection of a first cell in which the radio terminal is allowed to be serviced for a predetermined service to be satisfied, and a second condition in the measurement or record is satisfied, records information in a second cell in which the terminal is not allowed | be attended to the predetermined service, and reports to the radio station side, the radio station being,
in a case where a report from the radio terminal detects a situation in which the detection of a first cell in which a radio terminal is allowed. being answered, it is not possible, it indicates that the second cell in which the radio terminal is not allowed to be answered,, 'is present in the neighborhood, performs a change of a network configuration of at least one of the first cell and the second cell, as a strategy to reduce interference between the first cell and the second cell, and in a case where a report from the radio terminal indicates that the second cell is not present in the
Aa "BE 2" 2) 2 = "" ºÔOO cesssu MD! - | : + 13 fn—. 2 Do - neighborhood, performs a change to a network configuration related to the coverage of the first cell. | In accordance with the present invention, an operation administration and maintenance server is provided that performs the administration and operation of a radio, where a radio terminal that receives measurement instruction information from a radio station performs the measurement and recording according to the measurement instruction information, and in case of a first condition in the selection or detection of a first cell in which the terminal is allowed to be serviced for a predetermined service to be satisfied, and a second condition in the measurement or record is satisfied, records information in a second cell in which the terminal is not allowed to be serviced for the pre service -determined, and reports to the radio station side, and the administration and maintenance server performs control such that in a case where a report from the radio terminal detects a situation in which the detection of the first cell in which the radio terminal is allowed to be serviced is not possible, indicates that the second cell in which the radio terminal is not allowed to be serviced, is present in a neighborhood, a co n network configuration of at least one of the first cell and the second cell is changed, as a strategy to reduce interference between the first cell and the second cell, and in a case where a report from the radio terminal indicates that the second cell is not present in the neighborhood, a network configuration related to the coverage of the first cell is changed.
According to the present invention, a radio communication method is provided, where a radio terminal acquires measurement instruction information from a radio station, and performs measurement and recording according to the measurement instruction information and reports to the radio station, the method comprising:
the radio terminal, in case of a first condition in the selection or detection of a first cell in which the radio terminal is allowed to be serviced for, reception of a predetermined service to be satisfied, and a second condition in the measurement or recording be satisfied, it registers information in a second cell in which the terminal is not allowed to be answered to receive the predetermined service.
- Meritorious effect of the invention.
According to the present invention, a radio network side can identify a cause of a coverage problem such as a coverage hole, such as whether it is due to a lack of coverage or due to an interference problem, or the like.
Brief description of the drawings Figure 1 is a diagram illustrating a system configuration of a first exemplary configuration of the invention; Figure 2 is a diagram illustrating an arrangement of a measurement execution unit of the first exemplary configuration of the present invention; Figure 3 is a diagram illustrating sequential operations of the system of the first exemplary configuration of the present invention; Figure 4 is a diagram illustrating sequential operations of the system from a modified example of the first exemplary configuration of the present invention; Figure 5 is a flow diagram describing the operations of a radio terminal of a second exemplary configuration of the present invention; * Figure 6 is a diagram illustrating sequential operations of a system of the second exemplary configuration of the present invention; Figure 7 it is a diagram illustrating an example of a record of the second exemplary configuration of the present invention; Figure 8 is a flow diagram describing the operations of a radio terminal of a first modified example of the second exemplary configuration of the present invention;
”Figure 9 is a diagram illustrating the sequential operations of the system of the first modified example of
* second exemplary configuration of the present invention;
Figure 10 is a diagram illustrating the sequential operations of the system in a second modified example
7 of the second exemplary configuration of the present invention; -
Figure 11 is a flow diagram describing the operations of a radio terminal of a third exemplary configuration of the present invention;
Figure 12 is a diagram illustrating the sequential operations of a system of the third exemplary configuration of the present invention;
Figure 13 is a diagram illustrating an example of a record of the third exemplary configuration of the present invention;
Figure 14 is a diagram illustrating the sequential operations of the system of a second modified example of the third exemplary configuration of the present invention;
Figure 15 is a flow diagram depicting an example of operations for a radio terminal of a fourth exemplary configuration of the present invention;
Figure 25 is a flow diagram depicting another example of radio terminal operations in the fourth exemplary configuration of the present invention;
Figure 17 is a diagram illustrating an example of a
* registration of the fourth exemplary configuration of the present invention;
* Figure 18 is a flow diagram describing the operations of a radio terminal of a first modified example of the fourth exemplary configuration of the present invention;
Figure 19 is a flow diagram depicting the radio terminal operations of a second modified example of the fourth exemplary configuration of the present invention; Figure 20 is a diagram illustrating the sequential operations of a fifth exemplary configuration of. the present invention; Fig. 21 is a diagram illustrating an example of a "record of the fifth exemplary configuration of the present invention; Figure 22 is a schematic diagram illustrating ”operations when a cover hole is detected according to a Registered MDT; e Figure 23 is a diagram for describing related technology problems.
Ways to carry out the invention Exemplary configurations of the present invention are described using a 3GPP radio communication system (3rd Generation Partnership Project), as an example.
In one of the preferred configurations of the present invention, a radio terminal, in case of a first condition in a first cell in which the radio terminal is allowed to be serviced related to a predetermined service to be satisfied in an idle mode, records ( records) information in a second cell in the neighborhood in which the radio terminal is not allowed to be serviced in connection with a predetermined service, and after that, when the radio terminal goes into an active mode, the radio terminal reports to a radio network where the predetermined service, for example, can be a normal service (making a call, receiving a call, transmitting and receiving user data, and the like) supported by the radio terminal and radio network. . Therefore, in this case, the first cell is, for example, a cell where a radio terminal is allowed to receive (perform) a normal service.
The following describes a normal service as the predetermined service, merely as an example.
It is obvious that the predetermined service is not limited to this example.
The second cell in which the radio terminal is allowed to be serviced only to receive limited service, and / or a cell in which the radio terminal is inhibited from being serviced by (being connected to). In view of. definitions used in 3GPP, the first cell corresponds to a “suitable cell”, the second cell corresponds to an “acceptable cell”, and / or an “exception cell” (Non-Patent Literature 6). ":" - It should be noted that limited service may include an Emergency call, or an earthquake, tsunami, or similar emergency report (Earthquake and Tsunami Alert System: ETWS) (Non-Patent Literature 7). The “first condition” described above includes at least one of - the radio terminal detects a situation in which selection of the first cell is not possible, - the quality received from a cell serving, in which the radio terminal is being serviced, no longer meet a cell selection criterion, - a predefined period of time that has elapsed since the quality received from a cell serving, in which the radio terminal is being serviced, no longer meet a cell selection criterion, - the radio terminal transitions to a state in which the detection of the second cell is performed by the radio terminal.
In particular, in a case where the radio terminal detects a situation in which the radio terminal cannot select the first cell, an area in which the radio terminal * encamps is called a "cover hole". In addition, the second condition in the measurement or record 7 can be configured in advance.
For example, - a condition where, before (immediately before) the radio terminal meets the first condition, a measurement instruction (and an indicated measurement operation) was valid (has been performed), - a condition where, before (immediately before) the radio terminal meets the first condition, the
- 18 last area given belonging to a predetermined predefined area, - a condition where the radio terminal maintains information. valid location, at a point in time when the radio terminal satisfies the first condition, or, a condition where, at a point in time when the radio terminal satisfies the first condition, an area in which the quality received from a given downlink signal (pilot signal, signal: reference) is maximum (highest), belongs to a predefined area.
Similarly, predefined time in which the information in the second cell is recorded, can be configured in advance.
For example, this can be a period (interval) indicated in the measurement instruction information sent to the radio terminal from a radio network, such as a radio base station / base station control station, a point in the time in which the first condition is not met, or similar.
It should be noted that a more detailed definition of a cover hole, as assumed in 3GPP, indicates a situation in which the quality received from a downlink signal (Signal to Noise Power Ratio: SNR, Signal to Power Ratio for Interference and Noise: SINR, etc.) is less than a value (level) required to perform basic service, where the basic service indicates, for example, the establishment of an SRB (Radio Signaling Carrier), acquisition of system information transmitted (common information), and e. exchange of control information between a radio terminal and a radio base station, or similar.
Otherwise, in LTE, the Received Signal Power of | Reference (RSRP), and Quality Received Signal! Reference (RSRQ), and in UMTS, Received Signal Code Power (RSCP) from a common Pilot Channel (CIPICH), Energy ratio per modulation bit for the spectral noise density (Ec / No) of a CPICH etc. , are used as received quality.
NS 19 | Alternatively, a situation can also be called a cover hole where a radio terminal cannot select a cell in which the radio terminal is
”Allowed to be attended to receive a normal service, that is, Can the radio terminal not detect a cell in which the radio terminal is allowed to be serviced to receive normal service with which the radio terminal. is able to acquire transmitted system information.
The information in the second cell can be, for example:: - measurement results of the second cell (received quality, cell identifier, access restriction information, or similar), - information indicating the presence or absence of the second cell (if the second cell is present or not present in the neighborhood), - information indicating a type of the second cell (if a cell for which “only limited service is possible, given (connection) is an exception), - information that although the quality received from a downlink pilot signal (reference signal) is greater than OR equal to a predefined value, and / or system information can be acquired, the cell in question is a second cell, - presence OR absence of a cell in which the quality received from a downlink pilot signal (reference signal i) is greater than or equal to ONE predefined value, but system information cannot be acquired, - information indicating whether a cell, at which age. received from a downlink pilot signal (reference signal) is maximum (highest), is a first cell or a second cell.
It should be noted that the access restriction information may include member information (cse Identity (1D)) in a closed cell (Closed Subscriber Group (CSG) cell) in which radio terminals (members) | allowed to be attended to receive a Lo LEE Inaidos service, which is one of The service model
- | - 20 of a Femto cell (or may be called a Domestic cell), information about access exception (Access Class Exception (AC)) and so on. * In determining the presence or absence of the second cell in which the radio terminal is not allowed to be serviced to receive normal service, oThe following can be used: - '7 a method to recognize in advance that service is not allowed to receive -a normal service for a specific cell in the neighborhood, and determine whether the quality received from a cell downlink signal in question is greater than or equal to a predefined value (for example, greater than or equal to a required level to perform basic service), - a method to recognize in advance that service is not allowed to receive normal service for a specific cell in a neighborhood, and to determine whether system information transmitted in the cell can be acquired or not, - a method for detecting an identifier (eg Physical Cell ID: PCI / Primary Mixing Code: PSC) of a neighborhood cell, recognizing from the identifier whether service is whether or not allowed to receive a normal service, and determine whether system information transmitted in the cell in question can or cannot be acquired, - a method for acquiring system information transmitted in a neighborhood cell and determining, + based on the system information if service is or is not allowed to receive normal service. . However, the present invention is, of course, not limited to the methods listed above.
In the present specification, a radio cell / base station through which a certain radio terminal (EU) is allowed if answered (connected to), that is, it is allowed to establish a radio link, to receive (execute) | a predetermined service, for example a normal service, is called an “allowed radio cell / base station”. Conversely, a radio cell / base station by which a certain radio terminal (EU) is not 1, allowed to be serviced (connected to) to receive a predetermined service, for example, a normal service, 7 that is, a radio cell / base station with which a radio terminal (EU) is allowed to establish a radio link only to receive a "limited service", and / or a radio cell / base station with which a radio terminal (EU) ) a radio connection is not allowed, it is called a “cell / base station not allowed.” The allowed cell corresponds to the first cell as described above, and the disallowed cell corresponds to the second cell.
It should be noted that as for when a radio terminal (EU) determines a coverage hole, for example, there is a method for determining a coverage hole when an allowed cell cannot be selected in a predefined period of time (information system transmission cannot be acquired, or the quality received is less than a pre-defined value). Here, the pre-defined period of time can be: - during a “normally encamped” state, - during a “selected cell” state, - during a “encamped in any cell” state, or the like.
Here, normal radio terminal (EU) "operations on a 3GPP-specified system include: being in a" normally camped "state while a" suitable cell "is selected, and then making the transition to a" selection of any cell ”in a case where a“ suitable cell ”cannot (can no longer) be selected (detected), and transition to a state“ encamped in any cell ”in a case where an“ acceptable cell ”can selected (detected).
In the present specification, as an example, in a case where an allowed cell cannot be selected during a "normally encamped" state (ie, before "making the transition to a" selection of any cell "state), a determination of a cover hole is made].
However, in the present invention, the coverage hole determination is obviously not limited to this in particular. = - In. addition, in the description of the settings below, basically, as the first condition in the selection or detection of the first cell, it is assumed that a cover hole is detected and that the quality received from a cell meeting does not satisfy a cell selection criterion, and the operation of the radio terminal (EU) when these problems are detected, is described, but the configurations are also possible for operation in a stage before the detection of the cover hole, for example, during the predefined period of time.
Idle objectives can include RRC IDLE in 3GPP LTE (Long Term Evolution), and UTRAN IDLE, CELL PCH, URA PCH in 3GPP UMTS (Universal Mobile Telecommunication System). It should be noted that, below, a description with respect to Registered MDT focuses on RRC IDLE on LTE and UTRAN IDLE on UMTS, but the present invention can, of course, also be applied to CELL PCH and URA PCH.
When operating a radio terminal (EU) when it detects a cover hole, in the present invention,. specifically, there are two options as follows.
It should be noted that, as described above, the present invention 7 can also be applied to a stage before the detection of the cover hole, for example, as an operation during the predefined period of time described above. <option 1> In a case where there is a cell not allowed in a neighborhood for which a radio terminal is not allowed to receive a predetermined service, for example a normal service, the radio terminal performs the measurement of the cell not allowed with relation to the predetermined service, and records the measurement result.
It should be 'noted that the recording of the measurement result can be performed for only one case where the received quality' of a downlink pilot signal is greater than or equal to a pre-defined value.
Additionally, the registration can also be performed as “OOS” (Out of Service) (out of operating range). For another. On the other hand, in a case ... where a cell is not allowed in relation to the predetermined service in the neighborhood, nothing in particular is registered, or "OOS" is registered.
It should be noted that instead of “OOS” it is possible to have information indicating a coverage hole, out of coverage, out of service or the like, such as “Out of Coverage: OOC” etc., and is obviously not limited to this.
Here, a measurement result from a cell not allowed in relation to a predetermined service, or “oos” or similar, corresponds to the information in the second cell described above. <Option 2> Neighbor information (corresponding to information about the second cell described above) of an unallowed cell in which a radio terminal is not allowed to receive a predetermined service, for example, a normal service, is recorded.
In addition, “OOS“ ”(out of operation range) can also be registered.
The following are cited as neighbor information. o (A) Presence or absence of a cell not allowed in relation to a predetermined service.
In a case where a cell not allowed with respect to a predetermined service is present, cell information (PCI / PSC, and / or ECGI (Global Cell Identifier E-UTRAN) / CGI is also included. (B) Presence or absence of a cell in which the received power (RSRP / RSCP) of a downlink pilot signal is greater than or equal to a predetermined predefined value, but it is not possible to acquire transmission information from the cell.
In a case where the corresponding cell is present, "cell information" (RSRP / RSCP, PCI / PSC, ECGI / CGI, and the like) is included. (C) Information as to whether a cell for which the quality received 7 (RSRQ / Ec / No) of a downlink pilot signal is maximum (highest), whether or not it is an allowed cell with respect to a predetermined service and: (or it corresponds to a cell serving immediately preceding or a cell neighbor in a list of neighborhood cells (NCL)), or conversely, if a cell for which the received quality (RSRQ / Ec / No) of a downlink pilot signal is maximum, is or is not an allowed cell.
It should be noted that (A) is related to the presence or absence of a cell not allowed in relation to a predetermined service, (B) is related to the presence or absence of a cell for which it is not clear whether the cell it is a permitted cell or a disallowed cell, with respect to a predetermined service, but the cell satisfies a predefined condition, and (C) relates to information about the presence of an disallowed cell with respect to a service predetermined.
Neighborhood information therein may include information about an allowed cell with respect to a predetermined service, and can be said to be neighborhood information about an unallowed cell with respect to a predetermined service that the radio terminal it is not: allowed to receive (execute) the predetermined service.
Here, for example, on a Heterogeneous Network (HetNet) in which a macro base station (macro (e) NB) that manages a macro cell and a femto base station (or an H (e) NB: (e) Domestic NodeB ) that manages a CSG cell are present, a case is assumed where a cell in which a certain radio terminal is allowed to be serviced is a macro cell, and a cell in which the radio terminal is not allowed to be serviced is a CSG cell .
On a radio network side, in a case where information indicating the presence of a cell not allowed in relation to a predetermined service is reported (along 'with' OOS ') from a radio terminal, it is determined that the cause for a coverage hole is not a coverage problem between cells in which the radio terminal is allowed to be serviced (for example, between macro cells), but due to excessive interference by a cell in which the radio terminal is not it is allowed to be serviced (for example, a CSG cell or similar). In this case, the technique to avoid interference between macro cells and CSG cells (adjustment of a radio parameter) is applied.
Or, defining the CSG cell in question to an open cell or a hybrid cell can be considered.
In a case where the information, which indicates the presence of a cell not allowed in relation to a predetermined service, is not reported, it is determined that there is a coverage problem between the macro cells, and the optimization of the coverage of the macro cells is applied.
Regarding the optimization of the coverage of macro cells, any well-known optimization can be used (for example, increasing or decreasing the transmission power of a pilot signal to a specific macro cell, or expanding or shrinking the coverage by adjusting a tilt angle of antenna). As another example, a case is assumed where a macro cell in which a certain radio terminal is not allowed * if attended to, and a macro cell not allowed to bar access to the radio terminal (for a Class of 7 Access ( AC) to which it belongs) are neighbors.
On the radio network side, in a case where information indicating the presence of an unauthorized cell is reported (along with “OOS”) from a radio terminal, it is determined that the cause for a coverage hole is due to excessive interference between an allowed radio terminal cell and a non-radio cell
| allowed.
In this case, technology to avoid interference between the allowed macro cell and the not allowed macro cell is applied ("radio" parameter setting), or barring access to the not allowed cell in question is eliminated (canceled), and service is allowed for perform a predetermined service, for example, a normal service, for the radio terminal in question.
In a case where information indicating the presence of an unallowed cell is not reported, it is determined that there is a coverage problem between the allowed macro cells, and optimization of the coverage of the macro cells is applied.
Regarding the optimization of coverage of macro cells, any well-known optimization can be used (for example, increasing or decreasing the transmission power of a pilot or similar signal for a specific macro cell, or expanding or shrinking the coverage by adjusting an angle of antenna tilt). It should be noted that in the present exemplary configuration, a description has been provided where attendance is not allowed with respect to a predetermined service, but the present invention can also be applied to a case where attendance is not allowed with respect to an entire service . <First Exemplary Configuration> Figure 1 is a diagram illustrating a block configuration of a radio terminal (EU), a base station / base station control station, and an OAM server (Administration and Maintenance of Operation) / SON (Self-Organized Network), in an exemplary configuration of the present invention.
The radio terminal 10 includes a measurement instruction acquisition unit 11 that acquires a measurement instruction (Registered MDT configuration message) transmitted over a radio from base station 20, a measurement execution unit 12 that receives a measurement instruction from the measurement instruction acquisition unit
Measure 11 and measure the received or similar quality of a downlink signal, and a measurement result reporting unit 13 that reports a result of "measurement via a radio to base station 20. The radio terminal 10 includes a radio unit and a baseband unit both not shown in the drawings, and includes a cell detection unit 14 which, in addition to the initial cell search when a power supply is ON, performs a cell search '10 appropriate such as a cell that has good quality received for a radio terminal, based on a synchronization signal, during communication, during readiness, or at times of intermittent reception, and a control unit 15 that, like a circuit control, performs radio link control such as establishing a radio link connection, maintaining a connection, releasing a radio link connection and the like, and in addition, performs idle mode / active mode, and control of the respective parts.
The base station 20 includes a measurement instruction unit 21 which provides a measurement instruction for the radio terminal 10, an acquisition unit of | measurement result 22 getting a result of | 25 measurement from radio terminal 10 that received a measurement instruction from measurement instruction unit 21, a measurement result reporting unit 23 that reports a measurement result to server 7 OAM / SON 30, and a radio parameter setting change unit 24 that performs the change of radio parameter setting (transmission antenna tilt angle, transmission power, OR similar) of base station 20.
The OAM / SON 30 server includes a measurement result acquisition unit 31 that acquires a measurement result from the measurement result reporting unit 23 of base station 20, and a radio parameter configuration instruction unit 32 Radio parameter configuration instruction unit 32 provides a radio parameter configuration instruction for base station 20. It should be noted that the OAM / SON 30 server provides an instruction for radio parameter configuration for 7 base station 20, but a configuration is also possible in which the base station decides radio parameters, and notifies the: 'radio parameters decided for another station: base.
Figure 2 is a diagram illustrating an arrangement of the measurement execution unit 12 of figure 1. Referring to figure 2, the measurement execution unit 12 includes a measurement execution determination unit 121, a measurement detection unit coverage problem 122, a measurement unit 123, and a measurement result holding unit (storage unit) 124. The measurement execution determination unit 121 receives an instruction from the measurement instruction acquisition unit 11 , and instructs measurement unit 123 to perform measurement periodically according to a built-in timer not shown in the drawings.
As a result of measurement by measurement unit 123, in a case where the quality received from a serving cell then deteriorates below a predetermined predefined value, and a determination of a cover hole detection is made by coverage problem detection unit 122, as described below in several 7 examples, measurement execution determination unit 121 instructs measurement unit 123 to 7 perform a predetermined measurement operation (for example, measurement of a cell in which the radio terminal is not allowed to be serviced to receive (perform) a predetermined service, for example, a normal service, in the vicinity, the acquisition of information about the cell; or similar) in response to the hole detection coverage.
The measurement unit 123 stores at the 29 measurement result information or “OOS”, neighborhood information Or similar, at the measurement result retention unit 124. When passing from an idle mode (in * LTE, RRC IDLE) to a active mode (in LTE, RRC CONNECTED), the measurement measurement result unit 13 notifies an (E-) UTRAN that a measurement result from a Registered MDT is available, and reports a record (measurement result) stored in the measurement result retention unit 123 in response to a record search (record retrieval from (E-) UTRAN. Figure 3 is a diagram illustrating a procedure (sequential operations of a global system of the first exemplary configuration of this In the present exemplary configuration, "a radio terminal detects a situation in which the selection of a first cell is not possible" is used as a "first condition" as described above. It should be noted that "eNB / RNC" represents a network node eNóB in E-UTRAN, or a network node NÓóB + RNC in UTRAN. The radio terminal performs the measurement and recording with an interval (period) indicated by eNB / RNC, during an idle mode, and similarly continues the measurement and recording for a period of time notified by eNB / RNC.
Ma 25 An eNB / RNC of a cell in which a radio terminal (EU) is allowed to be serviced to receive (perform) a predetermined service, for example, a normal service (called “allowed cell”), instructs a terminal radio (EU) in an active mode to perform a Registered MDT in an idle mode (MDT 7 Idle Configuration), and makes a request to the radio terminal (EU) to acquire information about a cell in the vicinity, by which the radio terminal is not allowed to be serviced to receive a normal service (also called “cell not allowed”) (request for cell information not allowed), when the radio terminal detects a cover hole (S0: Idle MDT configuration +
- ,, Ô)% 22 0 r a / 5 - 2x p OPA “/ 2/4 Qu 5: at 0 an" o Pnuº. Ij2qoe “" [a MM MM 30 request for cell information not allowed in cover hole). That is, the measurement instruction unit 21 of the base station 20 in figure 3 requests that the 'radio (EU) terminal in a configuration message transmitted to it perform a Registered MDT and acquire 7 information about an unallowed cell, when a cover hole is detected. Here, the following examples can be cited as -. information included in a Registered MDT execution instruction (Idle MDT Configuration). - measurement and recording target (measurement objective), - event that triggers the measurement and recording execution (Triggering of recording events) (indicates a period in case of periodic measurement and maintenance), - valid measurement period and record (total record duration), - absolute record time on the network side (absolute network time mark), and - valid measurement and record area (measurement area).
The radio terminal (EU) 10 in an active mode receives a request to perform a Registered MDT and acquire information about a cell not permitted in a cover hole from the measurement instruction acquisition unit 11.
When switching to an idle mode, the measurement execution unit 12 of the radio terminal (EU) controls the measurement and recording according to an instruction given by the measurement instruction acquisition unit 11 (Sl). For example, 'measurement execution unit 12 instructs measurement unit 123 to perform measurement, when the time for measurement 7 arrives, according to a timer timeout occurrence (not shown in the drawings) to measure a period of pre-defined time embedded in the measurement execution determination unit 121.
Specifically, the measurement unit 123 measures, with a predefined period, the quality received of a cell downlink signal in which the radio terminal encamps and in which the radio terminal is allowed to be answered to receive ( perform) a predetermined service, for example, a normal service, and 'record a measurement result, time information (relative time stamp) and location.
ç Regarding the location information recorded together with the measurement result by the radio terminal (EU), in case of retention of valid location information by an Rn GNSS (Global Navigation Satellite System) such as GPS (Global Positioning System) ), the radio terminal (EU) records GNSS location information; otherwise, it records a measurement result (RSRP / CPICH RSCP + PCI / PSC) from a neighboring cell called an “RF fingerprint” instead of the GNSS location information. It should be noted that measuring a neighboring cell is an option, and is performed by the radio terminal (EU) as needed. There is no need for the radio terminal (EU) to perform the measurement of a neighboring cell for a Registered MDT only.
A neighboring cell that is a target for measurement is not only an allowed cell in which a radio terminal is allowed to be serviced to receive (perform) a normal service, but may also include a cell for which it is unclear whether it is a cell allowed or not.
On the other hand, measurement is not normally performed for a cell already recognized as a cell for which the radio terminal (EU) is not allowed to be serviced to receive (perform) a normal service.
Next, the radio terminal (EU) is assumed to detect a cover hole as a result of measuring the received quality (S2: cover hole detection) A cover hole corresponds to a situation (location), in which the quality received from all allowed cells is less than a pre-defined limit, and / or a situation (location) in which an allowed cell where transmitted system information is capable of being acquired cannot be detected. When the cover problem detection unit 122 of the measurement execution unit 12 detects a cover hole, the cover problem detection unit 122 instructs "measurement unit 123 to determine if an unallowed cell in which the terminal radio is not allowed "to be answered whether or not it is present in the vicinity. The measurement unit 123 instructs a cell detection unit 13 to detect a corresponding cell and makes - a determination based on the detection result. It should be noted that when determining whether an unallowed cell is present or not, a determination is made based on whether system information transmitted from the corresponding cell can be acquired or not, on the other hand, in a case where the radio terminal (EU) already recognizes that the cell in question is a cell in which the radio terminal is not allowed to be serviced, the determination can be made based on whether or not the received quality is greater than or equal to a pre-def value inido. In a case of an example in figure 3, it is assumed that an unallowed cell in which the radio terminal is not allowed to be answered is detected (S3: cell detection not allowed). The disallowed cell, for example, can be a blacklist cell managed by an eNB / RNC, or a CSG cell managed by an H (e) NODE.
The radio terminal (EU) records information about the disallowed cell (PCI / PSC, ECGI / CGI, CSG ID, or similar) (S4: Record information about disallowed cell). It should be noted that items described as option 1 and option 2 above, such as a "cell identifier (PCI / PSC, ECGI / CGI, CSG ID, etc.), the quality received from the corresponding cell (RSRP / RSCP, RSRQ / Ec / No, etc.) and the like are used as cell information not allowed In addition, at this time, the radio terminal (EU) can register “OOS” as information related to the existence of a cover hole. , in the measurement execution unit 12 of the radio terminal (EU), the measurement unit 123 stores information from a disallowed cell in the measurement result retention unit 124.] When a radio terminal (EU) in a mode idle comes out of a cover hole, the cell detection unit 14 r of the radio terminal (EU) detects a suitable cell, that is, a permitted cell (S5: Find suitable cell). "It is assumed that at a certain moment , a trip occurs that causes the radio terminal (EU) to go into an active mode.
At this time, at the radio terminal (EU), a radio link control unit of control unit 15 establishes a radio link with an allowed cell base station (RRC Connection Preparation). In a case where the radio terminal (EU) retains a record acquired in a Registered MDT, the radio terminal (EU) provides notification of record retention (record availability) to eNB / RNC at a point in time ( RRC Connection Preparation Complete) when the radio (EU) terminal goes to an active motorcycle.
ENB / RNC, responsive to this notification, retrieves the record (S6: record retrieval). The radio terminal (EU) transmits the retained record “measurement result = cell information in which the radio terminal is not allowed to be serviced when a cover hole is detected” to a base station of a servicing cell.
The measurement result acquisition unit 22 of the answering cell base station receives a report from. record retained from the radio terminal (EU), and the measurement result reporting unit 23 transmits the reported record information to an OAM.
The measurement acquisition unit 31 of the OAM detects from the registration information received that the cover hole is due to strong interference from a cell in which the radio terminal is not allowed to be serviced (S7: detect hole problem coverage due to strong interference).
The OAM parameter configuration instruction unit 32 requests that an eNB / RNC, which is considered to primarily manage the coverage hole area, for example, perform interference avoidance between target cells (SB: request to perform coordination interference). In the eNB / RNC requested to perform interference avoidance, the radio configuration switch unit - 24 parameter performs a solution for intercellular interference avoidance (interference relief process) such as antenna tilt angle control, power transmission or similar (SO: intercellular interference coordination). It should be noted that in figure 3, both cells targeted by eNB / RNCS management can execute the solution for avoiding intercellular interference, or only eNB / RNC | receiving the order from the OAM can execute the solution. <Modified example of the first exemplary configuration> Figure 4 is a diagram illustrating another procedure of the overall system in a modified example of the first exemplary configuration of the present invention.
Here, as with the “first condition”, “the quality received from a cell | given, by which a radio terminal is serviced, it no longer meets a cell selection criterion ”is used.
What is different from the first exemplary configuration in figure 3 is the point that, in figure 4, after detection of a cover hole, information about a cell in which the. radio terminal is not allowed to be attended to receive (execute) a predetermined service, for example ”a normal service, is registered.
In the modified example in figure 4, after the received cell quality does not meet a pre-defined condition (cell selection criteria) as a cell that is suitable for camping (S10: cell degradation detection according to), measurement records and measurement result (81-2 ...) are continued until a
The determination that a cover hole is detected is made (S2: cover hole detection), and also a cell in which the radio terminal is not allowed to be 'serviced to receive (perform) a predetermined service, for example a normal service, is detected * (83: cell detection not allowed), and information from! not allowed cell is registered (S4: registration information about cell not answered). After registering the -: information in the cell in which the radio terminal is not allowed to be answered (S4), measurement and registration are suspended until after the cover hole has been determined | (S2), an appropriate cell will be detected again (S5: discover suitable cell). It is noted that the procedures S8 to S9 are the same as in figure 3. Any well-known method can be used to detect a cell by the radio terminal (EU) in an idle mode.
Methods by which the radio terminal (EU) reports a measurement result include: - a method performed by measurement, - a method performed over a period other than a measurement period, - a method performed when instructed from a network radio, and the like.
In a triggered measurement event, the radio network notifies a radio terminal in advance of a condition that becomes a trigger for measurement, and the radio terminal performs the measurement when the condition is satisfied.
The triggering conditions can be, for example: - transmission channel failure, r - location channel failure, - the quality received from the attending cell becomes worse than the limit, - random access failure, - connection failure radio and the like (see Non-Patent Literature 1, 6 EU measurements). It should be noted that a transmission channel (BCH) and a
SS 36 location channel (PCH) are common channels on which base stations transmit using radio resources common to all radio terminals within a cell, e.g. are used for transmitting control information and making calls.
Methods for reporting a "measurement result from a radio terminal according to an event trigger include: - a method performed by measurement, - a method performed when instructed from the radio network.
The active mode indicates RRC CONNECTED (Connected Radio Resource Control) in LTE, and CELL DCH in UMTS.
CELL DCH is an RRC state where a dedicated physical channel is allocated to the uplink and downlink radio terminal (EU), and the radio terminal (EU) and base station are connected by individual channels to perform transmission and reception .
In Registered MDT, the following are included in content measured by the radio terminal (EU) in an idle mode: - quality received from a downlink pilot signal in a given cell, - quality received from a downlink pilot signal in an neighboring cell, and the like.
That is, the radio terminal (EU) measures the quality received from a downlink reference signal (pilot signal) from a cell base station mentioned above.
It should be noted that in LTE, RSRP - (Received Reference Signal Power) or RSRQ (Received Reference Signal Quality) is used as received quality.
On the other hand, in UMTS, CPICH RSCP (Signal Code Received Power from Common Pilot Channel) or Ec / No (Energy ratio per modulation bit for the spectral density of noise) is used.
In Registered MDT, the following are included in the contents reported by the radio terminal (EU) for the radio network side:
and | 2 37 '- quality received from a downlink pilot signal in an answering cell, - identifier from an answering cell (CGI / ECGI:' Global Cell Identifier / Global Cell Identifier E-UTRAN), * - quality received from a downlink pilot signal in a neighboring cell, '- neighboring cell identifier (PSC / PCI: Primary Mixing Code / Physical Cell Identifier), - measurement time (relative time from absolute time' when the radio (EU) receives a measurement instruction), - valid location information (GNSS (Global Navigation Satellite System) location information held at the time of measurement, or RF (Radio Frequency) fingerprint)), and the like.
In a case where the measurement time at the radio terminal is within a predetermined time predetermined from the time of acquisition of the GNSS location information at the radio terminal, the radio terminal determines that the GNSS location information is valid. In a case where the radio terminal (EU) does not retain valid GNSS location information, instead of GNSS location information, such as location information, a report is made of: an RF fingerprint (PCI / PSC + RSRP / CPICH RSCP: physical cell identification information from a neighboring cell + quality received from a downlink pilot signal from a neighboring cell). The physical cell identification information of one. neighboring cell includes a physical cell identifier (PCI) from a neighboring cell acquired by the radio terminal (EU), or a primary mixing code (PSC) to distinguish each cell. The quality received from the downlink pilot signal from a neighboring cell is RSRP / CPICH RSCP. <Second exemplary configuration>
- 2. o 38 Figure 5 is a flow diagram depicting the operation of the Registered MDT measurement of a radio terminal (EU) of a second exemplary configuration of the present invention.
In the present exemplary configuration, when a cover hole is detected, if one is detected cell not allowed in which the radio terminal is not allowed to be serviced to receive (perform) a predetermined service from a non-member CSG cell in the neighborhood, for example a normal service, the radio terminal (EU) measures the quality received non-member CSG and performs registration.
The radio terminal (EU) in an active mode receives a Registered MDT configuration message from an eNB / RNC (Idle MDT Configuration), and performs the Registered MDT configuration (step S101). When the radio terminal (EU) goes into an idle mode (S in step S102), a Registered MDT is started (step 8103). The radio terminal (EU) measures the quality received from a downlink pilot signal from an answering cell.
Additionally, the radio terminal (EU) measures the quality received from a downlink pilot signal from a neighboring cell, as needed.
With a result of measuring the quality received from the attending cell, in a case where the quality received from the attending cell becomes worse than a threshold (step S104, extension S), the radio terminal (EU) performs a neighbor cell search for whether or not there is a more suitable cell for camping in the neighborhood (step S105). . As a result of the search for a neighboring cell, when a suitable cell is present (S in step S105 = 6), 7 a reselection of a serving cell (cell reselection) is performed (step S107). After that, at the time of measurement at the Registered MDT (S in step S108), the radio terminal (EU) performs the cell measurement by answering and records a measurement result (S109). At this time, the measurement of a neighboring cell can be performed as needed, and a result of
NA 'i 39 measurement can be recorded.
It should be noted that along with the measurement result, moment information and location information are recorded.
In a case * where valid GNSS location information is retained, GNSS location information is recorded as: location information, and in a case where GNSS location information is not retained, an RF fingerprint is registered.
Then, when the radio terminal (EU) goes from an idle mode to an active mode (S in step S110), the radio terminal (EU) for the MDT Recorded measurement, and reports a record that the radio terminal (EU) withholds, according to an instruction from the radio network.
On the other hand, in a case where the radio terminal (EU) remains in idle mode (N in step S110), the control returns to step S104. As a result of the search for a neighboring cell in step S105, in a case where the radio terminal (EU) cannot detect a suitable cell in a predefined period of time (N in step S106), a cover hole is detected (step S111). Here, like the predefined time period, a duration for which the radio terminal (EU) is in a “normally camped” state can be considered.
However, there is no limitation for this, and a “selection from any cell” state or a “camped into any cell” state is also possible.
The radio terminal (EU) then determines whether the measurement time has arrived or not (step S112); if not time. measurement (N in step Sl112), the step moves to step 8105, but if the measurement time (S in step S112), “OOS” 7 (out of operating range) is recorded as an option (step S113 ). The radio terminal (EU) then attempts to detect a cell to determine whether or not an unallowed cell is present in the neighborhood (S114). If a disallowed cell is detected (S in step S114), measurement and recording of the disallowed cell is performed (step 115). A neighbor cell search is then performed again to find out whether there is a suitable cell in the neighborhood or not (step 105). Figure 6 is a diagram illustrating a sequence of the * system in the second exemplary configuration of the present invention. Referring to figure 6, a macro cell eNB / RNC requests to the radio terminal (EU) in an active mode, an MDT configuration Registered in an idle mode (Idle MDT configuration), and for measurement and record of the CSG cell in question (measurement setup and CH record) in a case where when a cover hole is detected, there is a non-member CSG cell in the vicinity (S11: Idle MDT setup + measurement setup and CH record). In a case where when a cover hole (CH) is detected, there is a non-member CSG cell in the vicinity of the radio terminal (EU). The order mentioned above instructs its measurement and recording.
When the radio terminal (EU) goes into an idle mode, the radio terminal (EU) periodically performs the measurement and recording of a macro cell that is a cell | attending, in pre-defined moments (S12-1, S12-2, | ...). The radio terminal (EU) can also perform measurement and recording as needed for neighboring cells.
Upon detecting the degradation of the quality received from the attending cell, (S13: detecting cell degradation attending), the radio terminal (EU) attempts to perform cell detection with respect to whether or not one exists. most suitable cell in the neighborhood. Figure 6 illustrates a case where the radio terminal (EU) detects a CSG cell (non-member) (a base station is HeNB / HNB) (Sl4: detection of CSG cell (non-member)). The radio terminal (EU) detects that the quality of the macro cell serving has degraded, and detects that there is a CSG cell with good quality in the neighborhood. However, since this is a cell in which the radio terminal (EU) is not allowed to be serviced, the radio terminal
(EU) does not perform cell reselection, and confirms whether or not there is another suitable cell.
After that, the radio terminal (EU) detects a hole. coverage (CH) (S15). At this time, the radio terminal (EU) can register “OOS” as information indicating that the cover hole has been detected.
After detecting the cover hole (CH), if an unallowed cell such as a non-member CSG cell is present in the vicinity, the radio terminal (EU) performs measurement and registration of the cell in question (S16). There are methods of determination such as: whether the cell not allowed is present or not, whether the quality received from the corresponding cell is or is not greater than or equal to a pre-defined value needed to perform basic service, or if system information transmitted from corresponding cell may or may not be acquired.
After that, the radio terminal (EU) detects a suitable cell (macro cell) (S17: Find suitable cell). The radio terminal (EU) again performs measurement and recording of the macro cell in question at predefined measurement time (S18). In a case where the radio terminal (EU) establishes a radio link with the macro cell's eNB / RNC and goes into an active mode, the radio terminal (EU) notifies the record availability to the eNB / RNC, and reports the record for eNB / RNC, according to an instruction by eNB / RNC to retrieve the record (S19). Figure 7 is a diagram illustrating an example of a record of the second exemplary configuration of the present invention.
Figure 7A illustrates an example of recording information for a Registered MDT in the respective measurement time of figure 7B (note that LTE is assumed in the present example). The radio terminal (EU) periodically performs measurement and recording in an idle mode.
It should be noted that a $ 200 / PCI $ 20 ECGI cell is a non-member CSG cell for this radio terminal (EU), and is not allowed.
In the present exemplary configuration, it is assumed that when the radio terminal (EU) detects a cover hole and detects a non-member CSG cell in the vicinity, the radio terminal (EU) records RSRP of the non-member CSG cell and the ID of the cell. As shown in figure 7B, the radio terminal (EU) that 7 receives an instruction to periodically execute the Registered MDT, is in an idle mode and encapsulates in the cell (ECGIHF11 / PCIH1).
rr “At time t = t0O, the radio terminal (EU) performs measurement and registration of a cell serving (ECGIH $ 11) and a neighboring cell (PCIH2). It is assumed that the measurement includes RSRP / RSRQ for the attending cell (ECGIH11), and RSRP for the neighboring cell (PCI $ H2). However, RSRQ of the neighboring cell can also be measured (PCI $ 2).
At time t = tl, with the quality received from the cell serving degraded, the radio terminal (EU) cannot find a cell allowed in the neighborhood, detects a cover hole, and records “OOS”. It should be noted that “OOS” can be treated as an option and does not necessarily need to be registered. The radio terminal (EU) records an RSRP measurement result for the non-member CSG cell (ECGIX $ 200 / PCI $ 20) that the radio terminal (EU) detects in the vicinity.
The radio terminal (EU) coming out of the cover hole performs measurement and registration of the attending cell (ECGI + $ 11) | and the neighboring cell (PCIH $ 2), at time t = t2. According to the present exemplary configuration, from a measurement result recorded by the radio 7 (EU) terminal when the cover hole is detected, it is possible to determine what the cover hole in question is. due to interference from a non-member CSG cell. In the present exemplary configuration, a radio terminal (EU) that detects a cover hole, registers “OOS”, in a case where in the vicinity, - an appropriate cell (allowed cell) is not present, and - an unallowed cell is not is present.
It should be noted that the registration of “OOS” is not mandatory. On the other hand, a radio terminal (EU) that detects a '. cover hole, records “OOS” and information about an unallowed cell detected in a case where, in the 1 neighborhood: - an appropriate cell (macro allowed cell) is not present, and -: - an unallowed cell is present.
With respect to information about the cell not allowed, a measurement result (RSRP / RSCP), PCI / PSC, or similar can be adopted. It should be noted that the registration of “OOS” is not mandatory. <First modified example of the Second exemplary configuration> Figure 8 is a flow diagram illustrating MDT measurement operations Recorded by a radio terminal (EU) of a first modified example of the second exemplary configuration of the present invention. Figure 9 is a diagram illustrating a sequence of a system of the first modified example of the second exemplary configuration of the present invention. What is different from the second exemplary configuration described with reference to figure 5 and figure 6 is as follows: In figure 5 and figure 6, after detecting a cover hole, the radio terminal (EU) performs measurement and recording for a non-cell allowed in which the radio terminal (EU) is not allowed to be serviced to receive (perform) a pre-service determined, for example a normal service (step S115 in figure 5, Sl6 in figure 6). In the first example] modified from figure 8 and figure 9, after detecting that a pre-defined condition (cell selection criterion) for a cell, which is suitable for camping with respect to the quality received from a cell serving, is no longer satisfied , The radio terminal (EU) continues to record measurement and measurement result for an attending cell (old) or neighboring cell until a cover hole is detected (dashed arrow time period from S13 to S15 in figure 9) ( step S116 in figure 8), and if a disallowed cell is detected (S in step Sl114 of 'figure 8, Sl4: CSG detection (non-member), in figure 9), the radio terminal (EU) performs measurement and recording 'of measurement results for cell not allowed (cell CSG (non-member) in figure 9) (step S115 in figure 8, S20 in figure 9). After detecting a cover hole (S in step S117 of figure 8, S15 of figure 9), »“ 10 the radio terminal (EU) suspends measurement and recording until the radio terminal (EU) detects an appropriate cell again ( S in step S106 of figure 8, S17 of figure 9). <Second modified example of the second exemplary configuration> Figure 10 is a diagram illustrating the sequential operations of a second modified example of the second exemplary configuration of the present invention.
A difference from the second exemplary configuration in figure 7 is that a cell not allowed in the vicinity is not a non-member CSG cell, but is a blacklist cell.
Referring to figure 10, an eNB / RNC places an order for a radio terminal (EU) in active mode for setting a Registered MDT in an idle mode (Idle MDT setting), and when a cover hole ( CH) is detected, in a case where there is a blacklist cell in the neighborhood, the eNB / RNC makes an order to the The radio terminal (EU) for measurement and recording of it ”(measurement and recording configuration CH) (821 : | 30 Idle MDT configuration + measurement configuration and | r CH register). | When the radio (EU) terminal goes into an idle mode, | the radio terminal (EU) periodically performs the measurement and recording in the pre-defined time (S22-1, S22-2 ...). It is assumed that at a certain point in time, the radio terminal (EU) detects degradation in the quality received from a cell attending, (S23: detection of degradation of
'o ”- o 45 cell answering). In a case where the radio terminal (EU) cannot detect a cell allowed in the vicinity in a period. time, the radio terminal (EU) detects a cover hole (CH) (S24: cover hole detection). At this moment, the radio terminal (EU) can register “OOS”. , The radio terminal (EU), after detecting a cover hole, tries to detect if there is a black list cell in the vicinity.
In the present exemplary configuration, it is assumed that a blacklist cell is detected (S25: Detect blacklist cell). When the radio terminal (EU) detects the cover hole, if there is a black list cell in the vicinity, the radio terminal (EU) performs measurement and registration of the black list cell (S26). After that, the radio terminal (EU) detects an appropriate cell (for example, a macro cell) (S27: Finds suitable cell). The radio terminal (EU) performs measurement and recording for the appropriate cell, that is, an answering cell, and a neighboring cell (828). The radio terminal (EU) establishes a radio link with an eNB / RNC of a macro cell serving, goes into an active mode, and reports a measurement result to the eNB / RNC (record retrieval) (S29). - According to the present exemplary configuration, when a cover hole is detected by the radio terminal | (EU), OAM can determine whether the cover hole in | The question is due to interference from the blacklist cell 7, or due to a defect in the blacklist definition (the corresponding cell must be removed from the blacklist), or if there is a problem of macro cell coverage. <Third exemplary configuration> Figure 11 is a flow diagram describing the Registered MDT measurement operation of a radio terminal (EU)
MM pp | 46 | in a system of an exemplary third configuration of the present invention.
In the present exemplary configuration, in a case where when detecting a cover hole, the radio terminal detects an unallowed cell in which the radio terminal is not allowed to be serviced 'to receive (perform) a predetermined service, for example For example, a normal service, such as a non-member CSG cell in the neighborhood, the radio terminal (EU) performs the | registration of neighbor information about the cell is not allowed.
Neighbor information about the cell does not | allowed not only includes information about the non-cell | allowed, but it can also include information about an allowed cell in which the radio terminal is allowed to be serviced to receive (perform) a predetermined service, for example, a normal service. ! Referring to figure 11, the radio terminal (EU) in an active mode receives an MDT | Registered (Idle MDT Configuration) of an eNB / RNC, and | performs the configuration of the Registered MDT (step S101). Í When the radio terminal (EU) goes from an active mode to an idle mode (S in step S102), the radio terminal (EU) starts MDT Registered (step S103). When the quality received from a given cell degrades (extension S in step S104), the radio terminal (EU) performs a neighbor cell search (step S105). As a result of the search for a neighboring cell, in a case where a more suitable cell is present (S in step S206), the radio terminal (EU) performs the reselection of an answering cell (step S107). At the Pra 30 moment of measuring the MDT Registered in idle mode (S in S step S108), the radio terminal (EU) performs the measurement of the cell by answering and recording measurement data (S109), 'At this moment, the radio terminal (EU) can perform the measurement of a neighboring cell as needed, and can record a measurement result.
It should be noted that along with the measurement result, the radio terminal (EU) records time information and
4 medium 47 location.
In a case where the radio terminal (EU) retains valid GNSS location information, such as location information, the radio terminal (EU) 'records the GNSS location information, and in a case where the radio terminal (EU) does not retain information from: valid GNSS location, the radio terminal (EU) registers an RF fingerprint.
The radio terminal (EU) establishes a radio link with a macro cell eNnB / RNC.
When the radio terminal (EU) goes from an idle mode to an active mode (S in step S110), the radio terminal (EU) stops the measurement of Registered MDT.
If the radio terminal (EU) continues to be in idle mode (N in step S110), control returns to step S104). As a result of the neighbor cell search (step 8105), if the radio terminal (EU) cannot detect an appropriate cell within a predefined period of time (N in step S106), a cover hole is detected (step S111). If the time is not a measurement time (N in step S112), the control moves to step S105. On the other hand, if the time is measurement time (S in step S1112), the radio terminal (EU) registers “OOS” (out of operating range) (step S113). Here, the registration of "OOS" is not mandatory, and "OOS" does not need to be registered.
The radio terminal (EU) tries to detect a cell that is not allowed (step S118: try to detect a cell that is not .— allowed). As a result of step S118, in a case where the radio terminal (EU) detects the cell not allowed 7 (S in step S114), the radio terminal (EU) performs registration of neighbor information on cell 7 not allowed (step S119). The following can be cited, for example, as the neighbor information about the disallowed cell recorded in step S119 of figure 11. (A) Presence or absence of an disallowed cell Where an disallowed cell is present, cell information ( PCI / PSC, and / or ECGI / CGI, etc.) is included.
oe 48 (B) Presence or absence of a cell in which it received the power (RSRP / RSCP) of a downlink pilot signal is greater than or equal to a predefined predetermined value, but it is not possible to acquire information of streaming.
In a case where the corresponding cell is present, cell information (RSRP / RSCP, PCI / PSC, ECGI / CGI or similar) is included. —- (C) Information as to whether a cell for which the received quality (RSRQ / Ec / No) of a downlink pilot signal is maximum (highest), is a permitted cell (or corresponding to a cell) or not immediately following precedent or a neighboring cell from a list of neighborhood cells (NCL). Or, conversely, information as to whether a cell for which the received quality (RSRQ / Ec / No) of a downlink pilot signal is a permitted cell or not.
Figure 12 is a diagram illustrating a sequence of the system in the third exemplary configuration of the present | invention.
Referring to figure 12, a macro cell eNB / RNC makes a request to the radio terminal (EU) in a | active, for MDT configuration Registered in an idle mode (Idle MDT configuration), and for registering neighbor information in an unallowed cell (CH register configuration), when a cover hole (CH) is detected (S31: configuration Idle MDT + CH registry setting). When the radio terminal (EU) goes into an idle mode, 7 the radio terminal (EU) periodically performs the measurement | and recording of a macro cell that is a cell serving 7 at predefined times (S32-1, S832-3 ...). Upon detecting the degradation of the quality received from the answering cell (833: detection of cell degradation answering), the radio terminal (EU) confirms whether or not there is a more suitable cell (ie, better received quality) in the neighborhood.
As a result, if an disallowed cell such as a non-member or similar CSG cell is detected, (S34: CSG cell (non-member) detection, the radio terminal (EU) does not perform cell reselection for the disallowed cell . * In a case of cover hole detection (CH), the radio terminal (EU) records neighbor information 7 (8535: cover hole detection + neighbor information record). can register “OOS.” Like neighbor information, for example, after detection of the cover hole (CH), if there is an unallowed cell in the neighborhood (for example, a non-member CSG cell) or similar, the terminal radio (EU) can record information: “cell not allowed present.” After that, the radio terminal (EU) comes out of a cover hole and detects a suitable cell (macro cell) (S36: Find suitable cell). radio terminal (EU) again performs measurement and registration of the macro cell that is a servicing cell, at t predefined measurement time.
The radio terminal (EU) establishes a radio link with an eNB / RNC from the macro cell and goes into an active mode, notifies record availability to the eNB / RNC, and reports the record to the eNB / RNC, according to a record recovery instruction received from eNB / RNC (S38). According to the present exemplary configuration, when the radio terminal (EU) detects a cover hole, the OAM can recognize the environment of the vicinity of the cover hole, and in particular the presence or absence of an unallowed cell.
This information can be used 7 as follows: When it is reported that an unwanted cell is present, for example, a determination can be made that interference from the unwanted cell is the cause for the same, and an instruction can be given to eNB / RNC apply technology to avoid (reduce) interference.
Figure 13 is a diagram illustrating an example of an ee 50 record of the third exemplary configuration of the present invention.
Figure 13A shows an example of registration information for a Registered MDT at the respective measurement time in figure 13B (note that LTE is assumed in the present example). the radio terminal (EU) r periodically performs measurement and recording in an idle mode.
It should be noted that a% $ 200 / PCI20 - ECGI cell: is a non-member CSG cell for this radio terminal (EU), and is not allowed.
In figure 13 B3, the radio terminal (EU) that receives an instruction to periodically execute Registered MDT Í is in an idle mode and encapsulates in cell 1 (ECGIH11 / PCIH1). Í At time t = t0O, the radio terminal (EU) performs measurement and registration of an answering cell (ECGIH11 / PCI $ 1) and a neighboring cell (PCI $ 2). The measurement result assumes RSRP / RSRQ for the attending cell (ECGIH $ 11), and RSRP for the neighboring cell (PCIH2). However, the radio terminal (EU) can perform the RSRQ measurement of the neighboring cell (PCI $ 2). At time t = tl, with the quality received from the cell serving degraded, the radio terminal (EU) cannot find a cell allowed in the neighborhood, detects a hole in the cover, and registers “OOS”. It should be noted that “OOS” can be treated as an option and does not need to be registered.
At this time, the radio terminal (EU) records neighbor information in an unallowed cell.
As the registered neighbor information, the following 1 can be cited, for example: - presence or absence of a cell not allowed in the neighborhood (if present, the ID of a non-member CSG cell (PCIXH20 and / or ECGIH200) is registered ), - presence or absence of a cell for which the received power (RSRP / RSCP) of a downlink pilot signal is greater than or equal to a predetermined predefined value, but it is not possible to acquire transmission information,
PS 51 - information as to whether a cell for which the received quality (RSRQ / Ec / No) of a downlink pilot signal is maximum (highest), is or is not an 'allowed cell (or corresponds to a cell serving immediately preceding or a neighboring cell in a list of cells in the vicinity (NCL)) (or, conversely, information as to whether a cell for - what quality received (RSRQ / Ec / No) of a downlink pilot signal maximum, whether or not a cell is not allowed). The radio terminal (EU) moves from the cover hole, and at time t = t2 , the radio terminal (EU) performs measurement and registration of the answering cell (ECGItH11) and the neighboring cell (PCIH2). In accordance with the present exemplary configuration, when the radio terminal (EU) detects a cover hole, the OAM can comprise neighboring information of the cover hole (the presence or absence of a disallowed cell), and based on the information neighboring is used to optimize coverage or apply technology to avoid (reduce) interference for a macro cell and CSG cell, and processes the execution of the same. <First modified example of the third exemplary configuration> In the third exemplary configuration described with reference to figure 11 and figure 12, after detection of a cover hole, information about an unallowed cell in which a radio terminal is not allowed to be serviced 1 to receive (execute) a predetermined service, for example, a normal service, is registered.
In the first modified example of the third exemplary configuration, after detecting that a pre-defined condition (cell selection criterion) for a cell, which is suitable to stay (camping) in relation to the quality received from a cell serving, is no longer satisfied, the measurement record and measurement result for a serving cell (old) or neighboring cell is continued for a period of
'52 time until a cover hole is identified, and also the registration is performed for neighbor information in the cell not allowed in which the radio terminal is not allowed to be answered.
That is, in the first modified example, the recording of 'measurement and measurement results of a serving cell or neighboring cell, and recording of neighboring information (for example, CSG cell information in figure 12) [related to a non-cell allowed are inserted between S33 (cell degradation detection) of figure 12 and cover hole detection of S35. It should be noted that in the first modified example, “cover hole detection + neighbor information record” of S35 in figure 12 forms cover hole detection.
In the first modified example, after determining a cover hole (after S35 in figure 12), measurement and recording are * suspended until an appropriate cell is detected again. <Second modified example of the third exemplary configuration> Figure 14 is a diagram illustrating sequential operations of the system of a second modified example of the third exemplary configuration of the present invention.
One point of difference from the third exemplary configuration described with reference to figure 12 is that a cell not allowed in the vicinity is not a non-member CSG cell, but is a blacklisted cell. ! Referring to figure 14, an eNB / RNC makes a request to "a radio terminal (EU) in an active mode, using a '30 configuration message, for the configuration of an MDT 7 Registered in an idle mode (configuration MDT | Idle), and in case where when a cover hole (CH) is detected, a blacklist cell is present in the neighborhood, for recording neighbor information in an unallowed cell such as the blacklist cell in question (S41: Idle MDT configuration + CH registry configuration).
When the radio terminal (EU) goes into an idle mode, the radio terminal (EU) performs measurement and recording in a pre-defined time (S42-1, S42-2 ...). 'It is assumed that at a certain point in time, the radio terminal (EU) detects the degradation of the quality received from] a cell servicing (S43: Detection of cell degradation servicing).
L In a case where the radio terminal (EU) cannot detect a suitable cell (suitable cell) in the vicinity for a pre-defined period of time, the radio terminal (EU) detects a cover hole (CH) (S44: cover hole detection). At this moment, the radio terminal (EU) can register “OOS”.
The radio terminal (EU) detects whether there is a blacklist cell in the vicinity (S45: Detect blacklist cell).
The radio terminal (EU) acquires information from the blacklist cell and registers the information as neighbor information (S46).
The radio terminal (EU) moves from the cover hole, and a cell detection unit 14 detects an appropriate cell (macro cell) (S47: Find suitable cell).
The radio terminal (EU) again performs measurement and registration of the macro cell that is an answering cell (S48).
The radio terminal (EU) establishes a radio link with an eNB / RNC of the macro cell, goes into an active mode, and reports a record that the radio terminal (EU) holds for eNB / RNC (S49: Record retrieval). 7 According to the present exemplary configuration, when the radio terminal (EU) detects a cover hole, the OAM can recognize the presence or absence of a blacklist cell and information thereon. In this way it is possible to determine whether the cover hole in question is due to interference from the blacklist cell, or due to a defect in the blacklist definition (the
AS ME | - A. 54 | corresponding cell must be removed from the black list), or there is a macro cell coverage problem. <Fourth exemplary configuration>. The following describes a fourth exemplary configuration of the present invention. In 3GPP, consideration is given to * making a radio terminal (EU) perform measurement and registration for a Registered MDT only if it is - BR camped in a pre-defined area. Here, the predefined area, for example, may include: - Registered Public Mobile Land Network (RPLMN), where a radio terminal (EU) location is registered, - a cell (list of 32 global cell IDs ( measurement record is performed only when an EU.15 encamp in these cells)), - TA or LA or RA (measurement record is performed only when an EU encamp in a cell belonging to TA / LA / RA) and the like (Literature No Patent 4); where TA (Tracking Area) is an area that is a unit for managing the location of a radio terminal (EU) in an LTE idle mode; LA (Location Area) is an area (location area) that is a unit for recording the location of a radio terminal (Circuit Switched domain (CS)) on UMTS; and RA (Routing Area) is an area that is a unit for recording the location of a radio terminal (Packet Switched domain (PS)) in UMTS.
When a radio terminal (EU) detects a cover hole, the radio terminal (EU) is in a situation It is where the radio terminal (EU) does not clearly know where (in which area) the radio terminal (EU) camp. Consequently, in a case where measurement and recording in: Registered MDT are limited to a predefined area, when the radio terminal (EU) detects the | coverage, since your station's camping location is unknown, the radio terminal (EU) does not
“The 55: | i | can determine if the location is in a pre- | specified. | For example, in a case where, when the radio terminal! . (EU) detects a cover hole, the radio terminal | (EU) is instructed to perform measurement and record the 'measurement result, Or to record “OOS (Out of | Service)”, the radio terminal (EU) does not actually perform measurement and record the measurement result, and / or not i records “OOS”. Or, for the radio terminal (EU), no | it is clear as to what condition the measurement and recording of the measurement result and / or recording of “OOS” can be done.
This problem depends on when (at what point in time) the radio terminal (EU) recognizes a cover hole.
For example, assuming that in a case where it is not possible for the radio terminal (EU) to select an allowed cell (transmitted system information cannot be acquired, or the quality received is less than a predefined value) in which the radio terminal (EU) is allowed to be attended to receive (perform) a service | predetermined, for example a normal service, in a predefined period of time, the coverage hole is recognized, in the relevant predefined period of time the area in which the radio terminal (EU) is already camped is not clear, and the operation of the radio terminal (EU) in the relevant predefined period of time is an objective to which the present invention applies.
Here, the pre-defined time period described above may include, for example: - while a radio terminal (EU) is in a state "Normally camped", - while a radio terminal (EU) is in a state " Selection of any cell ”, - while a radio terminal (EU) is in a state“ Camped in any cell ”, and the like.
Consequently, in the present exemplary configuration, in case of detecting a cover hole, a condition for measuring and recording measurement results and / or registering “OOS” is any of the following. (1) In a case where an area (PLMN, Cell / TA / LA / RA) just before the cover hole is detected, is an area that is a target for a Registered MDT, as long as the area in | What radio terminal (EU) camp is not updated, | the Registered MDT is seen to be valid, and measurement and - recording of the measurement result are performed «and / or“ oos ”is recorded.
In the present exemplary configuration, after detecting a cover hole, measurement and recording of the measurement result and / or recording of “OOS” are performed until a pre-defined time elapses.
Or, a pre-defined number of measurement times and recording of measurement results, and / or "OOS" recording is performed. (IT) In a case where when the radio terminal (EU) detects a cover hole, GNSS information is available, the radio terminal (EU) performs measurement and recording of the measurement result and / or recording of “OOS” . (III) In a case where when the radio terminal (EU) detects a cover hole, a cell where RSRP / RSCP measured is the highest belongs to an area (ECGI / CGI) that is a target for Registered MDT, the radio terminal (EU) performs measurement and recording of the measurement result and / or recording of “OOS”. At this point, a determination is made as to whether or not the cell is a target area for Registered MDT, according to whether or not there is a PCI / PSC registered in the past, or whether to retain a relationship between ECGI / CGI and PCI / PSC, based on this relationship, a PCI / PSC from a cell with the highest RSRP / RSCP is included or not in the target area.
It should be noted that instead of RSRP / RSCP, RSRQ / Ec / No or similar can be used.
Figure 15 is a flow diagram describing the operation of the radio terminal (EU) of the fourth exemplary configuration of the present invention.
Figure 15 corresponds to the case (1) described above.
When the radio terminal (EU) is in an active mode, a measurement instruction acquisition unit 11 receives a Registered MDT configuration message from: an eNB / RNC, and performs a Registered MDT definition (step S101). 'When the radio terminal (EU) goes into an idle mode (S in step S102), a Registered MDT is initiated by a - measurement execution unit 12 (step S103). When the quality received from a cell meeting 2 degrades (extension S in step S104), the radio terminal (EU) performs a neighbor cell search for a cell detection unit 14 (step S105). As a result of the search for a neighboring cell, in a case where an appropriate cell is present (S in step S106), the radio terminal (EU) performs cell reselection to the corresponding cell (step S107). When a measurement time arrives (S in step S108), the radio terminal (EU) in an idle mode performs the measurement of the cell servicing by a measurement unit 123 of the radio terminal (EU), and records the measurement result in a measurement result retention unit 124 (8109). At this moment, the radio terminal | (EU) can also perform measurement and recording as needed for neighboring cells.
The radio terminal (EU) establishes a radio link with the eNB / RNC, and when the radio terminal (EU) goes from idle to active mode (S in step S110), processing is terminated, while in case in a way. idle (N in step S110), control returns to step s104. Í As a result of the neighbor cell search (step 8105), in a case where an appropriate cell is not present (N in step S106), the radio terminal (EU) detects that the radio terminal (EU) is camping in a cover hole (step S111), and if the time is not the measurement time (N in step S112), it moves to step 8105, but if the time is the measurement time (S in step S112), a
. 58 checking is done as to whether update processing has been performed for the area in which the radio terminal (EU) is camping (S120: No change to camp site). In a case where update processing was not performed (extension S in step S120), the 'radio terminal (EU) registers “OOS” (out of operation range) (step S121). That is, in the present exemplary configuration, An area immediately before detecting the cover hole is an area specified as a Registered MDT target, and as long as the area is not updated, for an area in which the cover hole was detected , the radio terminal (EU) sees a Registered MDT being kept valid, and registers “DOS” (out of operation range). <First modified example of the fourth exemplary configuration> Figure 16 is a flow diagram of another example of operation of the radio terminal of the fourth configuration | exemplary of the present invention.
Figure 16 is different from | 20 figure 15 at the point that, in figure 15 after the detection of a cover hole, a decision is made as to | register or not “OOS” (step 8121 in figure 15) of | according to whether an area's update processing! camping was performed or not (step S120 in figure 15), | | 25 while in figure 16, from the detection that a | predefined condition of a cell, which is suitable for camping with respect to the quality received from a cell! given, it is no longer satisfied (S in step S104 of!. figure 16), until a borehole determination | 30 coverage is made (step S123 in figure 16), in a case where there is no processing update of the encamped area (S in step S120 in figure 16), the measurement record of a cell serving (old) or 'neighboring cell and measurement results are continued (step S122 | 35 in figure 16). After a radio terminal (EU) determines | that there is a hole in the cover, the radio terminal (EU) | suspends measurement and recording until the radio terminal
(EU) detect a suitable cell again. Figure 17 is a diagram illustrating an example of a record of the fourth exemplary configuration of the present. invention. Figure 17 is an example of LTE; a Registered MDT is valid only in the tracking area TA,: and is invalid in the tracking area TA2. The radio terminal (EU) performs measurement and recording periodically. Figure 17B is an enlarged diagram of two macro cells and a cover hole in Figure 17C. == In figure 17B, the radio terminal (EU), which receives an instruction to periodically execute the Registered MDT, is in an idle mode and encapsulates in the macro cell (ECGI $ 11 / PCIH + 1). At time t = tl, the radio terminal (EU) performs measurement and registration for an answering cell and a neighboring cell (ECGI% 22 / PCI $ 2). The radio terminal (EU) measures RSRP / RSRQO of the attending cell (ECGI * $ 11), and RSRP of the neighboring cell (PCI $ 2), but not limited to it. The radio terminal (EU) can also measure RSRQ of the neighboring cell.
At time t = t2, the quality of the cell being served degrades and the radio terminal (EU) detects a cover hole. At this moment, since the tracking area in which the radio terminal (EU) is camping is TAl, the radio terminal (EU) records "OOS" "". Regarding whether or not the radio terminal (EU) is camped in TAl, there is a method for determining whether a Tracking Area Update (TAU) was performed or not from TA before the cover hole was detected.
At time t = t3, the radio terminal (EU) performs measurement and registration of a cell serving (ECGI + X $ 22) and * a neighboring cell (PCIH1). At time t = t4, a cell / tracking area (TAU) update is performed. In figure 17C, does the radio terminal (EU) camp in the TA and detects a cover hole at t = t5, but since the tracking area is outside TAl, the radio terminal (EU) does not register “OOS”.
It should be noted that in figure 16, instead of registering “OOS”, in a case where there is no processing update of the camped area, from an instant * when the radio terminal (EU) detects that the quality received from a answering cell does not satisfy one predefined condition for a cell, where it is suitable for the radio terminal (EU) to camp (S in step S104 of figure 16) until the radio terminal (EU) determines a cover hole (step S123 in figure 16) , the radio terminal (EU) can continue measuring a cell | answering (old) or neighboring cell and recording the measurement result. <First modified example of the fourth exemplary configuration> Figure 18 is a flow diagram illustrating radio terminal (EU) operations of a first modified example of the fourth exemplary configuration of the present invention.
In figure 18, the same step numbers are given to the steps that are the same as in figure 15. The first modified example corresponds to the case (11) described above.
In a case where, when detecting a coverage hole, GNSS information is available, the radio terminal (EU) registers “OOS”. In the first modified example, when detecting a cover hole (step S111), and if the measurement time arrives (S in step S112), a radio terminal (EU) control unit 15 checks whether GNSS information is available ( step S124). If GNSS information is available 7 (S in step S124), the radio terminal (EU) registers “OOS” and GNSS information (step S125). It should be noted that the radio terminal (EU) has a receiver that acquires GNSS information. <Second "modified example of the fourth exemplary configuration> Figure 19 is a flow diagram illustrating radio terminal (EU) operations of a second modified example of the fourth exemplary configuration of the present invention.
The second modified example of the fourth exemplary configuration corresponds to case (III) described above.
The radio terminal (EU), when detecting a hole of. coverage, records “OOS” if a cell with the highest measured RSRP / RSCP belongs to a registered MDT 'target area (ECGI / CGI). In figure 19, the same step numbers are given to steps that are the same as in figure 15. In the second modified example, when the radio terminal (EU) detects a cover hole (step S111), and when the measurement time arrives (S in step S112), the measurement execution unit 12 of the radio terminal (EU), compares the RSRP / RSCP measurement results of the cells for which measurements are performed (step S126). The measurement execution unit l12a checks whether the best cell having the highest RSRP / RSCP belongs to a Registered MDT validity area (step S127: Best cell belongs to a validity area). If the best cell belongs to the validity area (S in step S127), the radio terminal (EU) records “OOS” and GNSS information (step S125). It should be noted that instead of RSRP / RSCP, RSRO / Ec / No can be used. | In the present exemplary configuration, the radio terminal (EU) registers “OOS”, in a case where the radio terminal (EU) that encamps in the cover hole searches for neighboring cells and there is no cell not allowed in which the radio terminal does not it is allowed to be attended to receive (execute) a predetermined service, for example, a normal service, and records "OOS" "and information | . to one or more disallowed cells, in a case where there is one or more disallowed cells (in a case | 7 where an unallowed cell is present, the cell information to be registered is RSRP / RSCP, PCI / PSC corresponding cell), | <Fifth exemplary configuration> The following describes a fifth exemplary configuration of the present invention.
As described in the fourth configuration | example, a second condition in measurement or registration | in ee. At 62 when a cover hole is found (detected) it is one of the following conditions (1) to (4), or a combination of them. It should be noted that in the present exemplary configuration *, a condition to register "OOS" is shown as an example of the second condition.
7 (1) A Registered MDT was valid just before a cover hole occurred (MDT measurement was performed). : (2) One area (PLMN, Cell / TA / LA / RA) immediately before - | 10 of a cover hole to occur is a registered MDT target area. (3) GNSS information available is retained. | (4) A cell with a higher RSRP / RSCP (or RSRQ / Ec / No) belongs to a registered MDT target area (ECGI / CGI). | 15 It should be noted that these conditions can also be | applied to exemplary configurations of the present invention | that, in case of detection of a cover hole, it records information (neighbor information) related to a: cell not allowed in a neighborhood, in which a radio terminal is not allowed to be answered to receive (execute) a pre-service determined, for example, a normal service. Additionally, the application of these conditions is also possible for operations in a stage before detecting a cover hole. In the fourth exemplary configuration, with respect to the condition mentioned above (2), when a cover hole is detected, provided there is no area update from an immediately previous area (specified As a registered MDT target area), the Registered MDT is seen to be valid.
7 In the present exemplary configuration, from the moment a cover hole is detected until a pre-defined time elapses, or until the execution of a pre-defined number of measurements and records, the radio terminal (EU) executes quality measurement and recording received from a neighboring cell (non-member CSG). The condition mentioned above (3) is that GNSS information co 63 available is retained.
Only - ““ OOS ”with no location information can be considered as a lack of information. : Regarding the condition mentioned above (4), even if system information (Master Information Block: 7 MIB / System Information Block: SIB) cannot be acquired, RSRP / RSCP can be acquired.
A determination is made as to whether there is a PCI / PSC that has been registered in the past.
In the present exemplary configuration, the radio terminal (EU) also retains a record and reports the PCI / PSC of a cell with the maximum (highest) RSRP / RSCP. Figure 20 is a diagram illustrating the sequential operations of a system of the exemplary fifth configuration of the present invention.
A macro cell 2 eNB / RNC instructs a radio terminal (EU) in an active mode with a configuration message to perform measurement and registration of a non-member CSG cell, in a case where a non-member CSG cell is present in the neighborhood, when a cover hole (CH) is detected (S51: Idle MDT configuration + measurement and CH register configuration). A measurement instruction acquisition unit 11 from the radio terminal (EU) receives the message, acquires the instruction mentioned above, and controls the measurement execution unit 12. When the radio terminal (EU) goes into an idle mode, the measurement execution unit 12 of the radio terminal (EU) performs measurement and recording periodically (S52-1). The radio terminal (EU) performs cell reselection / update 7 (9853: Cell reselection / update). In figure 20, the radio terminal (EU) selects macro cell 1 after macro cell 2. The measurement execution unit 12 of the radio terminal (EU) periodically performs a measurement and recording (S52-2). The radio terminal (EU) detects that a CSG cell is not
Nvu rr O Y mm Ns) | CSS::: 64 member is present in the neighborhood (S54: CSG cell detection (non-member)). When detecting a cover hole, the measuring unit 12] of the radio terminal (EU) performs the “OOS” record (S55: CH detection + 7 “OOoSs” record). After detecting a cover hole, the measurement execution unit 12 of the radio terminal (EU) performs the quality measurement received from a neighboring cell and a cell: 10 non-member CSG, and performs registration (S56). The cell detection unit 14 of the radio terminal (EU) detects a suitable cell (macro cell 1) (S57: Find suitable cell). - The measurement unit 12 of the radio terminal (EU) performs measurement and recording of macro cell 1 (S58). The control unit 15 of the radio terminal (EU) establishes a radio link with the eNB / RNC of macro cell 1, the radio terminal (EU) is in an active mode, and the measurement result reporting unit 13 from the radio terminal (EU) reports a record of retention of the measurement result to the eNB / RNC of macro cell 1 (859: Record retrieval). According to the present exemplary configuration, when the radio terminal (EU) detects a cover hole, executing measurement and recording of quality received from a neighboring cell (non-member CSG cell) until a pre-defined number of measurements and records “Is achieved, it is possible to acquire detailed information from. vicinity of the cover hole.
Figure 21 is a diagram illustrating a record of a Registered MDT in the fifth exemplary configuration of the present invention.
Figure 21A shows an example of a record of a Registered MDT at various times in figure 21B.
The radio terminal periodically performs measurement and recording.
An ECGI $ 200 / PCI $ F20 cell is a non-member CSG cell, and is not allowed to be serviced.
In figure 21B, the radio terminal (EU) that receives an instruction to periodically execute the Registered MDT is in an idle mode and encapsulates in macro cell 2 (ECGIX22 / PCIH2). At time t = tO0O, the radio terminal: (EU) performs measurement and registration for an attending cell and a neighboring cell (ECGIH $ + 11 / PCIH $ 1). The measurement result 'is RSRP / RSRO for the attending cell (ECGI * $ 22), and RSRP for the neighboring cell (PCItH1). The radio terminal (EU) moves from macro cell 2 to macro cell 1, and at time t = tl performs measurement and registration of the attending cell (ECGIH $ 11 / PCIH1) and the neighboring cell (ECGIR $ 22 / PCIHF2). The measurement result is RSRP / RSRQ for the attending cell (ECGI * $ + 11), and RSRPF for the neighboring cell (PCI $ 2). It should be noted that RSRQ / Ec / No can be measured for the neighboring cell.
At time t = t2, the quality of the cell being served degrades and the radio terminal (EU) detects a cover hole. At this moment, the radio terminal (EU) measures the quality received from the non-member CSG cell, and performs “OOS” registration for the attending cell (ECGI * $ 11), and RSRP and an ID (PCI $ H20) for the non-member CSG cell.
At time t = t3, the radio terminal (EU) detects the presence of an unacceptable cell in the neighborhood and performs the recording of a measurement result of the given cell (ECGI $ 22), and an RSRP / RSRQ measurement result and the Cell ID (PCI $ 20) of the non-member CSG cell, or a measurement result and the ID (ECGIX $ 200) of a macro cell that is another neighbor cell, In the exemplary configuration described above, a description "was given with" ( a) a situation was detected in which the selection of a first cell was not possible ”, or (b) 7 the quality received from a cell meeting during the connection no longer meets a cell selection criterion”, as a “first condition ”As an example. However, the exemplary configuration described above of the present invention is, of course, also applicable with respect to the other first conditions: “(c) a pre-defined period of time has elapsed after the quality received from a cell serving, while a radio terminal is 'connected, no longer meet a' cell 'selection criteria, or' (d) a radio terminal has moved to one: state where detection of the second cell is performed '. For example, in case of using (c), a step can be 'added, before the first condition is satisfied in the example of (b), with the step being to determine whether a predefined period of time has elapsed or not. after a | the cell selection criteria are no longer met, using a radio terminal timer.
The present invention can also be applied using (d) with “a radio terminal has moved to a state where the detection of the second cell is performed” such as “moved to" Select any cell "state or a state * Encamped in any cell ”'” In the exemplary configurations “described above, a description was given focusing on a“ cover hole ”, but the application is also possible for other coverage problems.
An example of these is “pilot pollution”. “Pilot pollution” is a phenomenon occurring in a situation (area), for example, where due to the overlap between neighboring cells being large, the level of interference is high, the power received from the attending cell is also (relatively) high, and cell performance (production or similar) is low.
As “first conditions” corresponding to pilot pollution, the following examples can be cited: “the quality received from a cell serving as one radio terminal being serviced is less than a first level, and the quality received from (at least one) neighboring cell is greater than or equal to a second level ”, or“ the quality received from a cell serving while a radio terminal is being attended to is less than a third level, and the quality received from (at least one) neighboring cell is greater than a predefined deviation (positive or negative value) than the quality received from the attending cell ”.
* If these first conditions are met, oThe radio terminal records (registers) information (neighbor information) related to a cell in which the radio 'terminal is not allowed to be serviced to receive (perform) a predetermined service.
'It should be noted that it is possible for a radio terminal to record relevant neighbor information only once in an instant in time when a | The relevant first condition is satisfied, or it is possible for the radio terminal to continue recording relevant neighbor information (for example, | periodically) every time that the relevant first condition is met. In the latter case, for example, the radio terminal may suspend registration when the radio terminal detects a cover hole afterwards. Based on a report of the relevant neighbor information from a radio terminal, a radio network side is able to recognize a coverage problem (pilot pollution in this case), and perform appropriate surveillance (optimization) processing. Here, as the location information, in addition to GNSS location information, the location information acquired in an LCS (Location Service) session can be used. As information added when a radio hole cover hole is detected by a radio terminal, a terminal mode can be reported, such as the terminal being in a state. bent, or when a light behind is flashing, or a terminal situation such as a speed of movement of the terminal 7 can be reported. The respective disclosures of the Non-Patent Literature described above are hereby incorporated by reference in this specification. The exemplary configurations & and examples can be changed and adjusted within the scope of all disclosure (including the scope of the claims) .of the present invention and based on the fundamental technological concepts thereof.
In addition, a wide variety of combinations and selections of various disclosed elements (including 'respective elements of the respective configurations, respective elements' of the respective drawings, and 'similar') are possible within the scope of the claims of the present invention.
That is, the present invention, obviously, includes each type of transformation and - modification - that a person skilled in the art can perform according to all disclosure including the scope of the claims and the technological concepts thereof.
[List of reference signals] 10 radio terminal i 11 measurement instruction acquisition unit '12 measurement execution unit 13 measurement result reporting unit' 14 cell detection unit 15 control unit 20 base station / base station control station 21 measurement instruction unit: 22 measurement result acquisition unit 23 measurement result reporting unit 24 radio parameter configuration change unit 25 OAM / SON server 31 result acquisition unit measurement unit 32 radio parameter configuration instruction unit 121 measurement execution determination unit - 122 coverage problem detection unit 123 measurement unit 124 measurement result retention unit.

权利要求:
Claims (28)
[1]
1. Radio communication system, characterized by the fact that a radio terminal, with the acquisition of measurement instruction information from a radio station, performs measurement and recording according to “the measurement instruction information, and if reporting to the radio station, the radio terminal comprising: - - a measurement execution unit which, when discovering that a first condition in the selection or detection of a first cell in which the | radio is allowed to be answered for a predetermined service, is satisfied, and a second condition on measurement or record is satisfied, records information in a second cell in which the terminal is not allowed to be answered for the predetermined service.
[2]
2. Radio communication system, according to claim 1, characterized in that the first condition comprises at least one of: - the radio terminal detects a situation in which the selection of the first cell is not possible; - the quality received from a cell serving while the radio terminal is being served, no longer meeting a cell selection criterion; - the passing of a pre-defined period of time since the quality received from a cell serving, while the radio terminal is being served, no longer meets a cell selection criterion; and is. - the transition from the radio terminal to a state in which the radio terminal performs the detection of the second cell - 30 to be performed.
[3]
Radio communication system according to either of claims 1 or 2, characterized in that the second cell is a cell in which the radio terminal is allowed to be serviced only for the radio terminal to receive a limited pre-service - determined, and / or a cell that prohibits being connected. 4, Radio communication system, according to
[4]
"e" 1 2s2! l / pP O ". P1ó27% 0% e ... = 01 A NC 22" A ÁOÔeuo 0 Cú * * oo ..õ5ó) .P .a MÔ OO> ”a. ms 1 2 'any one of claims 1 to 3, characterized in that the radio terminal comprises: - a measurement result report making unit which, after detecting a situation in which the detection of the first cell does not it is possible, in a case "where the first cell is detected again, to notify the radio station of a measurement result including. information about the second cell, autonomously or in response to an instruction from the radio station.
[5]
5. Radio communication system according to any one of claims 1 to 4, characterized in that, in case the first condition is met, the radio terminal determines whether or not the second cell is present in the vicinity of the and record information about the second cell.
[6]
6. Radio communication system, according to claim 5, characterized by the fact that the radio terminal performs a determination as to whether the second cell is present, based on any of: whether the quality received from a given link signal descendant of the second cell is or is not greater than or equal to a pre-defined value, or whether system information can be acquired correctly
[7]
Radio communication system according to either of claims 5 or 6, characterized in that, in a case where the second cell is present in the vicinity, the radio terminal performs "* measurement for the second cell, and record a measurement result as information about the second cell.
[8]
Radio communication system according to any one of claims 1 to 7, characterized in that the radio terminal includes information on whether the second cell is present or absent and / or an identifier of the second cell in the information about the second cell.
[9]
9. Radio communication system according to any one of claims 1 to 8, characterized
. by the fact that the radio station or the operation administration and maintenance server decides and executes a process to resolve a situation in which detection of the first cell is not possible, according to the presence or absence of the second cell reported from. the radio terminal.
[10]
10. Radio communication system according to - any one of claims 1 to 9, characterized by the fact that the radio station and / or the server for administration and maintenance of operation, - in a case where a report from the radio terminal indicates that the second cell is present in the neighborhood, perform an interference avoidance process, and - in a case where a report from the radio terminal indicates that the second cell is not present in the neighborhood, perform optimization of roof.
[11]
Radio communication system according to any one of claims 1 to 10, characterized in that the second condition comprises at least one of: - a condition where, before the radio terminal satisfies the first condition, the measurement instruction information is valid; - a condition where, before the radio terminal satisfies the first condition, the last area it meets belongs to a predefined predetermined area; . a condition to retain valid location information at a point in time when the first condition is met; and - a condition where an area, in which the quality received from a given downlink signal assumes the maximum at a point in time when the first condition is satisfied, belongs to a predefined area.
[12]
12. Radio communication system, according to claim 11, characterized by the fact that in a case where based on a condition that before the
Í. radio detects a situation in which the detection of the first cell is not possible, an area in which the radio terminal is last serviced belongs to a predetermined predefined area, the radio terminal continues to register in the pre-defined time defined while. there is no update of the area in which the radio terminal is serviced, and / or even a period of time - of predefined time after detecting a situation in which the detection of the first cell is not possible.
[13]
13. Radio communication system, according to claim 11, characterized by the fact that in case of detecting a situation in which the detection of the first cell is not possible, the radio terminal registers an identifier of an area in which the quality received from a given downlink signal assumes the maximum.
[14]
14. Radio terminal, which receives measurement instruction information transmitted from a radio station and performs measurement and recording according to the measurement instruction information, characterized by the fact that it comprises: - a measurement execution unit that, in if a first condition in the selection or detection of a first cell in which the terminal is allowed to be met for a predetermined service to be met, and a second condition in the measurement or record is met, record information about a second cell in which the terminal is not allowed to be serviced for pre-service. determined.
[15]
Radio terminal, according to claim 14, * 30 characterized in that the first condition comprises at least one of: - the radio terminal detects a situation in which the selection of the first cell is not possible; - the quality received from a cell serving, while the radio terminal is being served, no longer meets a cell selection criterion; - a predefined period of time has elapsed since
: 5. that the quality received from a cell serving, while the radio terminal is being served, no longer meets a cell selection criterion; and the second condition comprises at least one of: - a condition where, before the radio terminal. satisfy the first condition, the measurement instruction information is valid; 7 - a condition where, before the radio terminal satisfies the first condition, the last area it meets belongs to a predefined predetermined area; - a condition for retaining valid location information at a point in time when the first condition is met; and - a condition where an area, in which the quality received from a given downlink signal assumes the maximum at a point in time when the first condition is satisfied, belongs to a predefined area.
[16]
16. Radio station, from a radio communication system, where a radio terminal that receives measurement instruction information from the radio station performs measurement and recording according to the measurement instruction information, and in one case of a first condition in the selection or detection of a first cell in which the radio terminal is allowed to be serviced for a predetermined service to be met, and a second condition in the measurement or record to be met, records information about a second cell in which the terminal - it is not allowed to be attended to the predetermined service, and reports to the radio station side, * 30 characterized by the fact that in a case where a report from the radio terminal detects a situation in which the detection of the first cell in which a radio terminal is allowed to be serviced, if not possible, indicating that the second cell in which the radio terminal is not allowed to be serviced, is present in the vicinity, perform a change of a network configuration from at least one to the first cell and the second cell, as
[17]
:. a strategy to reduce interference between the first cell and the second cell, and in a case where a report from the radio terminal indicates that the second cell is not present in the vicinity, execute | 5 a change to a network configuration related to | . coverage of the first cell. | 17. Radio station according to claim 16. characterized by the fact that the first condition includes at least one of: - the radio terminal detects a situation in which the selection of the first cell is not possible; - the quality received from a cell serving, while the radio terminal is being served, no longer meets a cell selection criterion; —- a pre-defined period of time has elapsed since the quality received from a cell serving, while the radio terminal is being served, no longer meets a cell selection criterion; and - the transition from the radio terminal to a state where the detection of the second cell is performed, and the second condition comprising at least one of: - a condition where, before the radio terminal | satisfy the first condition, the last area given 'belong to a predefined predefined area; —- a condition to retain valid location information at a point in time when the first condition is met; and . - a condition where an area, in which the quality received from a given downlink signal assumes the maximum y 30 at a point in time when the first condition is satisfied, belongs to a predefined area.
[18]
18. Operation administration and maintenance server, which performs the administration and operation maintenance of a radio communication system, characterized by the fact that a radio terminal that receives measurement instruction information from a radio station, executes measurement and recording according to the
. measurement instruction, and in the case of a first condition in the selection or detection of a first cell in which the terminal is allowed to be serviced for a predetermined service to be met, and a second condition in the measurement or record to be met, record information . over a second cell in which the terminal is not allowed to be serviced for the predetermined service, and - report to the radio station side, with the administration and maintenance server performing control such that: - in one case where a report from the radio terminal that detects a situation in which the detection of the first cell in which the radio terminal is allowed to be served is not possible, indicate that the second cell in which the radio terminal is not allowed to be served , is present in a neighborhood, a network configuration of at least one of the first cell and the second cell being changed, as a strategy to reduce interference between the first cell and the second cell, and - in a case where a report to the from the radio terminal indicate that the second cell is not present in the vicinity, a network configuration related to the coverage of the first cell will be changed.
[19]
19, Operation administration and maintenance server, according to claim 18, characterized in that the first condition includes at least one of:. - the radio terminal detects a situation in which the selection of the first cell is not possible; '30 - the quality received from a cell attending, while | the radio terminal is being serviced, no longer meeting a cell selection criterion; | - the passing of a predefined period of time since the quality of a cell serving, while the | radio terminal is being serviced, no more | satisfy a cell selection criterion; and - the transition from the radio terminal to a state where the
. detection of the second cell is performed, and the second condition comprises at least one of: - a condition where, before the radio terminal meets the first condition, the measurement instruction information is valid; . - a condition where, before the radio terminal satisfies the first condition, the last area meeting * belongs to a predefined predefined area; - a condition to retain valid location information at a point in time when the first condition is met; and - a condition in which an area, in which the quality received from a given downlink signal assumes the maximum at a point in time when the first condition is satisfied, belongs to a predefined area.
[20]
20. Radio communication method, where a radio terminal acquires measurement instruction information from a radio station, and performs measurement and recording according to the measurement instruction information and reports to the radio station, characterized by the fact of understanding: the radio terminal, in case of a first condition in the selection or detection of a first cell in which the radio terminal is allowed to be attended to in order to receive a predetermined service to be satisfied, and a second condition in the measurement or record is satisfied, record information about a second cell in which the. terminal is not allowed to be attended to the reception of the predetermined service.
. 30
[21]
21. Radio communication method according to claim 20, characterized in that the first condition includes at least one of: - the radio terminal detects a situation in which the selection of the first cell is not possible; - the quality received from a cell serving, while the radio terminal is being served, no longer meets a cell selection criterion;
. - the passing of a pre-defined period of time since the quality received from a cell serving, while the radio terminal is being served, no longer meets a cell selection criterion; and -—- the transition from the radio terminal to a state where a. detection of the second cell is performed, and the second condition comprises at least one of: * - a condition where, before the radio terminal satisfies the first condition, the last area being served belongs to a predetermined predetermined area; - a condition to retain valid location information at a point in time when the first condition is met; and - A condition where an area, in which the quality received from a given downlink signal assumes the maximum at a point in time when the first condition is satisfied, belongs to a predefined area.
[22]
22. Radio communication method according to either of claims 20 or 21, characterized in that the second cell is a cell in which the radio terminal is allowed to be serviced only for the radio terminal to receive a limited pre-service - determined, and / or a cell that prohibits being connected.
[23]
23. Radio communication method, according to any of claims 20 to 22, characterized by the fact that, after detecting a situation in which the detection of the first cell is not possible, in a case where the first cell is detected again, the radio terminal notifies the radio station of one. 30 measurement result including information about the second cell, either autonomously or in response to an instruction from the radio station.
[24]
24, Radio communication system, characterized by the fact that it comprises: - a radio terminal; - a radio station that connects and communicates via a radio with the radio terminal under its
. control; and - an operating administration and maintenance server device that performs the administration and maintenance of operation of a radio network including the radio station. - the radio terminal comprises: - a measurement instruction acquisition unit that E receives a configuration message instructing the measurement and recording by the radio terminal in an idle mode, from the side of the radio station; and - a measurement execution unit that performs the measurement of the quality received from a servicing cell and a cell in the neighborhood, in an idle mode, and recording a measurement result, according to the content of the configuration message instruction; where - the measurement execution unit, in case of a first condition in the selection or detection of a first cell in which the terminal is allowed to be served for the reception of a predetermined service to be satisfied, and of a second condition in measurement or record is satisfied, record at least one of: - information indicating the occurrence of radio coverage failure; - whether or not a second cell is present in which the radio terminal is not allowed to be serviced to receive a predetermined service in the vicinity of an area in which the radio coverage failure occurs; . —- identification information of the second cell in which the radio terminal is not allowed to be answered, acquired ”30 by the radio terminal; and - a result of measuring the quality received of a given downlink signal from the second cell in which the radio terminal is not allowed to be answered, measured by the radio terminal, and the radio terminal comprising - a cooking unit measurement report that when the radio terminal establishes a radio link
. 11. with the radio station and goes to an active mode, reports the registered content to the radio station, and the radio station that receives the registered content report from the radio terminal transmits the report to the administration server and maintenance. of operation; and - the operation administration and maintenance server “analyzes the report from the radio terminal, and decides a strategy to resolve the radio coverage failure, according to whether a cell in which the radio terminal is not allowed to be attended is present or not in the vicinity of an area in which the radio coverage failure was detected.
[25]
25. Radio communication system, according to claim 24, characterized in that the first condition includes at least one of: the radio terminal detects a situation in which the selection of the first cell is not possible; | —- the quality received from a cell attending, while; 20 the radio terminal is being answered, no more | satisfy a cell selection criterion; '- the passing of a predetermined period of time since the quality received from a cell serving, while the radio terminal is being served, no longer meets a cell selection criterion; and - the transition from the radio terminal to a state where the detection of the second cell is performed, and where. the second condition comprises at least one of: - a condition where, before the radio terminal meets the first condition, the measurement instruction information is valid; a condition where, before the radio terminal satisfies the first condition, the last area being served belongs to a predefined predefined area; - a condition to retain valid location information at a point in time when the first condition is met; and
: 12 i => steel spo Do o - 1. - a condition where an area, in which the quality 1 received from a given downlink signal assumes the maximum J at a point in time when the first condition is met, belongs to a predefined area.
[26]
26. Radio communication system according to either of claims 24 or 25, characterized in that the radio cover failure is a cover hole, and the system executes at least one between (A) À a (K), according to the content of the measurement instruction from the radio station side: (A) when detecting the cover hole, the radio terminal registers the existence of the cover hole, and in addition determines whether the second cell in which the radio terminal is not allowed to be serviced to receive a predetermined service is or is not present in | neighborhood, and if present, record information about the second cell in À neighborhood; (B) when the quality received from a cell serving is degraded, a determination will be made as to whether one | cell is or is not present that allows a | only a predetermined specified radio terminal 'related to a predetermined service, such as a second cell in the vicinity, and: 25 in a case where a cover hole is detected, the' quality received from a cell in which a terminal from | radio is allowed to be answered to only the radio terminal. specified radio to be measured, and the cover hole and a measurement result of the second cell in which the radio terminal '30 is allowed to be serviced so that only the specified radio terminal is recorded; (C) the measurement and recording of a cell serving is a cell in the neighborhood to be executed in a period of time after detecting degradation of the received quality It is 35 of the cell serving and until a cover hole is detected, and in the event of detecting a cell in which a radio terminal is allowed to be serviced for only a specified predetermined radio terminal, such as the second cell in the vicinity, the measurement and recording of a measurement result will be performed for the cell in which the radio terminal is allowed to be serviced for only the specified radio terminal, and
. after the detection of the cover hole, the measurement and: registration are suspended until a suitable first cell in which a radio terminal is allowed * to be answered is detected again;
(D) when the quality received from a serving cell degrades, a determination will be made as to whether or not a cell is present which belongs to a list of specified cells designated in advance so as not to perform cell measurement in the neighboring neighborhood , and in case of detecting a cover hole, the quality measurement received from a cell belonging to the list is performed, and the cover hole and a measurement result of the cell belonging to the list are recorded;
(E) when the quality received from a cell serving to degrade, such as the second cell, in the neighborhood, a determination must be made as to whether or not a cell is present which allows a connection to only a specified predetermined radio terminal , and if a cover hole is detected, information including the cover hole and whether or not a cell is present which allows a connection to the radio terminal only
. specified, be recorded; (F) the measurement and recording of a servicing cell and a: 30 cell in the neighborhood be performed for a period of time after detecting quality degradation received from a servicing cell and until a cover hole is detected, and as information of the second cell, registration to be performed of information in a cell in which only a specified radio terminal pre-
determined is allowed to be served in the neighborhood, and
OH). s . be suspended until, a suitable first cell in which a radio terminal is allowed to be serviced is detected again; (G) when the quality received from a cell serving is degraded, a determination will be made as to whether one. cell is or is not present which belongs to a list. of specific cells designated in advance so as to "not measure a cell in the neighbor in the vicinity, and in case of detecting the cover hole, recording is performed of information including the cover hole and whether a cell belonging to the list is or not (H) in case a cover hole is detected, information including the cover hole and, as information from the second cell, whether or not a cell is present which allows a connection to only the specified radio terminal to be registered ; (1) in a case where the cover hole is detected, an area in which the radio terminal is present until just before the failure is detected is a target measurement area, and an area in which the radio terminal is present not be updated, the cover hole, or a measurement result from a cell in which the radio terminal is not allowed to be serviced in the vicinity of the cover hole are recorded, (3) in a case where when the cover hole rupture is detected, there is valid location information, the cover hole is recorded; and . (K) in a case where when the cover hole is detected, a cell with the highest received quality - 30 belongs to a target measurement area, the cover hole, or a measurement result from a cell in which the radio is not allowed to be serviced in the vicinity of the coverage hole being registered. 1
[27]
27. Radio communication system according to any one of claims 24 to 26, characterized by the fact that. two
, in a case where a report from the radio terminal indicates that a second cell in which the radio terminal is not allowed to be serviced to receive a predetermined service is present in the Neighborhood, make a definition to execute a strategy. avoidance of interference with the radio station,. or the second cell in which the radio terminal is not allowed to be serviced, and - in a case where a report from the radio terminal indicates that a second cell in which the radio terminal is not allowed to be serviced to receive a predetermined service is not present in the vicinity, radio coverage optimization will be performed by radio station. i
SIE SSSÍMÉA SAM PÊÔ OS RS RR OS NA A ER ERR RR RS RSS RR RS RR RR RR RS RR RS RS RS AND o o 17 1 1 '2 2uo i. or La 1 So Zz E 30: 'õ 8 2' 39 É '9, aoo SQul, Zz [ES 22º, <! nº & 2 ÉE5o | [a az wo) õ i UD = wo '2, FrH' E! & 8 | | éss | O »! '2 5 Zo8 & | oO 1 GS Ione A od. : 5 NR RA ul fo N eee Ne ADIA doe.
FE) S 'i SE is E and o | tor | 3 & bo 2 <o 'rr HE, | Xo are 38o to 1 ut TE 244 Ea). | SS $ ho uu' | 22 TES Error us) - nu! ÉS = = u = Is = 2 = 9) <s uu use 3 uOogs Lu. mo! ans ud oLC: o4! [wu WC, 2% uses <o | | 05 Aus io 26u 'or, | <<So <' <r Ss ao = suo 281 | 8 3 whether "o, 'O Laosdesssesss = --— = - rtsncsssn —-——————— e = o sz ss e FAITH or TTTRIITTITRI OST QIOTTARDIOTTOIS a, o o u and wu' - <<<os <= 'i wool s | Ss z 'à | | 8go DO qu da x '4 | 398 E rm ES z Í + <2 no & u FE) 8 í z | | 64ES 5a o | Ê u um uu joined w 1 =! ' [00% og to the E! juÊEy Wu s <uu um! Rr Guo are 25 2º 9 'e: | | already, [is | already go | / ls 5 If 3s E '1 1 LOL IIIIOOOOOOoooO ooo]
o | =: 82 x the us - | Wu | DE Rerscscvsrentar no wu Ss *% | Fis) i i k .: r a:: Ss: -: Fx ao: Pot = i DR al 8 i | : duo j az so: NA: or oo i | oS | i << u i a: & z i: ES i Ou =: <; om In j nd i so [=]; Eu i TO) Es j o i au so | ——> at: í Ww i os as: of i aã So i ace [| i 2 if H = o:: o Z: uu ã. 2nd SE í Px O j SE o: nn; 2 j u.
Poe:: o: | o: = PE =: y i NS oo NS:: E <i 2; go o í So i z8 É: i go: == ã: aos: x u: 30) i uu = j <ral =): ”ur2 + uo uu: aos: O, a: uz : us uu i =): as o: ”ao so ã: = â <x z i Ê or 3 H> & Zu i ã 3e j
No o =
And e and g = are
ES Er º o 2 - o a o:: Ó a E N Bd SO - se: 2 Ss 2H t oa Ss 3 £ e s 8. HB only 5! - S | 2 = 13 8) It is 8 6 / | E z | 8 3 ll al! 5th SE) 66 3 | * 8 Ejs oO 8 »o = - 5 8 sjl / s. ú SE - ba ba z 5 É ”Z Nº & Sl S 3 a ê ê = | s 5 E É EE FIRSENA É ê SE E | z ê E | 3 Elm | Es & 3 Fi E = 2 ê 2 ns So El E 5 = | CO | Es = É zs / | = o Ol 3 e <l O õ $ 3 º 8 8 à: S o & io 5 = oae Ss 2 3 + E 3 Elgg | s = om 8/2 os so Ss so * É Ss OE 2 81là EE o =; o & Fo 6 = o o o E 8 F & o 78 5 Feet 2 2 E '= ” o 3 so IS Ê Z ss 5 o o 8 o a E õ s | SS '= Ss ss and S. = | 2 Ss a pes â = mu E o - ——. ss ———-———— .. s——
OALY
ONLY OSOIDO
Nr f
Õ - - 2 = ão <q ese O 32Ss sa e
E S go 'SES | the 225 e 882 | jo soT | SO ES T AND S M E IS THE
E Z E 2 | Ss o = | And Sl). E & $ | & | 2/3 o 18 ê ce o = = | 8 sz 8 | | And Ss o ”o & 3 -) ss = | O so 3 // 2 oz Tr os o 8 | olo = = —- au o ”x S o O ON O IS S sl | s => = E E E 8 // Ss s à E É à 3 s Zs / o o F 218 E1Z o ê o &. El À & s se s Oo E 21 = ã = E Ss S | 35 5 ã z sz 8 ê oo 2 + ooo 8 Dilo S 8 3 Ss o So8 E o Ss So -) S "= o8gS | | 8 | [sli Sl, E g HES | | 2/2 E% EXPRESSA & a = es o FEIESIA ns a E Em = e | | = the 8 2 FE) Ss S / S if 3 8g7E | | & | [8 | S EE 8 s - EX: 83 o Elis es og if the 2 ais E É E Soo = $ | and P õ Dão Ss ve o - Z o = - EE ee | E 8 s 8 53 8 s Fr> E 8 ES | wu 3 ê 8 gives) = v à = Õ atle-k = 2At = - kb O CN a ONLY O0SsOI190 ONLY oo) = T Zz o Z SN le e | = qz ê oi É: se uo> z E & E EE: li 2) fil Se.
[28]
28 Pages to ils If 3 SP 8 to oe = o8 E ss Yeah. so o É à das ê õ 2 To 3 ê Es $ 38 2 ”o> S 3 õ Ê JJ | o 'E Ss -. 8 S = Ss DR - 8: õ õS; . , ã * í to S 3 el. 8 E | = | 2H ê EO o 8º E o Ss & | & 8 $ g: o o 3 s 8 3 $ | and
It is ——— o | o <o gs <SE = Zz = Ss 8> 8 = if 8 = IF (É = É: s: | $ s; i: E 3 ê;: É ê: j 3 | 2 ê ê o 3 => | 3 É Z Ss |) 3 O, 3 35 8 8 & oo seo 3 K z:: Ss = 0 5::: É A.:::; It's 3::::. $:: 3 | E 18] E |
Z o
Macro | and | eNB / RNC | os sn ê Idle MDT configuration + configuration <measurement and CH record Ss12-1 css tnm member) 812-2 [o HeNB / HNB Detection of cell degradation according to Ss14 8 LO LÓ | $ | the LS | Cover hole detection JRR s16
ERES Find suitable cell S18 LL = —————
LS | Registry recovery
Registered MDT Record (EXAMPLE LTE) RSRP / RSRQ RSRP RSRP / RSRQ RSRP FIG.7A | Macro cell (ECGH11 / PCIHH1)
CG É t = to N (e É E ”/ j Macro cell 7>, ra / (ECGt22 / PCIh2) N E) and“. 'Sa, = —— CSG cell not EN LL (ECG $ 200 / PCI20) FIG.7B o <Zi o - o + o -) õ so S Õ a = Z = E co & ”o [2 - ã 5 LZ as S "oo Is il, O = sane: E ko a E 35 3ã 8 BB | = o Es (= ae Se 2 ES E Seo” ET 2o S i; E es 8 ss o = * õ vv o << o õ BR 2 s gs 8 E 2 s EE Z $ z $ 38 P 8 2 8 s S So e O = ZÉ on S | & 2 ê Ss 3 and 3 3 2 | z 8 E | = | 3 E la o E 13: A oo õ <ev EA 8 no o <zoaz 2 * S = $ Fr ú HA o oa Ss sq 8 o Ss 8 m & = o = O & ”O qoso oO E or Z ã ê É 3 s us F 3:: VW = a = | / 8 ê z 2 | fe & | 3.) | E | 1 / s2 $ | ES are ERMCENESIS IN IT ê 3s o o. =: so 8 o = uo os $ s - og = & 8 3 HE 3 E z 8 õ = - â 3 EE o ê
And the o
| Macro - | | me | eNB / RNC o Ss ê Idle MDT configuration + <measurement and CH register configuration | LO Dr so SD, NN— S $ 12-2 | HENB / HNB Bo E ss Detection of cell degradation according to S14 8 O 8 LO õ 'Detection of CSG cell (non-member) | S20, ssIrirErri ii pj ur 1 Measurement, recording Cover hole detection s17 Find suitable cell s18 | CN Measurement, record - 'g e) Record retrieval
Macro Blacklist cell | me | eNB / RNC eNB / RNC o S21
Ê Idle MDT configuration +
<measurement and recording configuration CH LAO 822-1
Measurement, LO record] $ 22-2 EE ss Detection of cell degradation according to
9 A o Cover hole detection
8 S25 PAL LL LAI A S26 Mr ELLA S28 o Can o) ot LL TO sa; ã | Record retrieval '<FIG.10 pro sa 8 = = o E = a = si = o = Dr = O El = (OE' 2 o 8 s & as S oo Fr o ke FE; 28 E & Ss 2 E o> 2 Ss É. Ss z What if - the els the Ss IF a E're | E Es Es E and% 2º> = B ss << ão 8 É = 8 = o T É 2 o E) Ss SP> = É:: P KH vo õ É F à Z ã 2 õ 5 o P 8 Ss Ss DR) oe = 7 = o Z o ”” DR s 3 are only q 2 o &% a 2 = e 8 FA> 2 = 214/5188] 58 S & e - PTS It's 7 "o Ed - 2 o Ss sz ua It's health & E = 2 ra + <=" ogos "<and Ss o <| o 8 2 =) S = & & Ç 2 o - D oo =) j E ozg 3 & & 3 E IS E, ã e su 8 7 E o 2 Ss ae 3 = = = /8.8 IS ESVEA / ê | 88 2 q ã S E PAS os 7 = sa o o o Ss = 5 É É É É ã 2 g 3 3 - 8 Ss 3 = £ = = E and £ 8 o
O
Macro | me | eNB / RNC o S31 Ê Idle MDT configuration + <measurement configuration and CH record LA $ 92-1 seo (non-member) Measurement, record S32-2 [Co HeNB / HNB Measurement, record Fo E ss Cell degradation detection according to S34 | IR | 8 CSG cell detection (non-member) Cover hole detection + 2 neighbor information record CSG cell INFORMATION Find suitable cell s3a7
LO ET Measurement, recording | LET SS o. ê Record recovery í <
Recorded MDT record (EXAMPLE LTE) Instant = Echo RSRP / RSRQ RSRP o Jeos RSRP / RSRQ RSRP FIG.13A Macro cell Co »(ECGIH11 / PCH1) 7 Ú e É fa fa fa j Macro cell À>. TS Í (ECGIH22 / PCi2) 2 NO CR) x «o» * o NL Non-member CSG cell (ECGIH200 / PCi20) FIG.13B
'Macro Blacklist cell | & | eNB / RNC eNB / RNC o S41 Et Idle MDT configuration + <CH EEE measurement and register configuration are healthy! Measurement, register S42-2 [O Measurement, register Detection of cell degradation according to o | [- baskets sect you: | ses O) Detect blacklist cell = S 46] CELL INFORMATION
A Find suitable cell SAB L = —— = ——— -
EFFECT o>: | Measurement, record FIG. 14 o = SS oo = Ss E sl o = ê Õ 2 8 g ê - i À 2 é $ É + 9 uu os To Õ 8 e = fi £ '"E 38% s º eo 2 & e S SS> o so 8 8 a ss = bs E Bo É 8 o ES> -ro '2 oo 3 Dl o SS BR o - = o Z oo DR s 3 so H ã Sl.
SC He | E | z 8 E 15 - a '& oo Ss is 2 É aa aa = 2 $ 5 2 xro) - "2 8 = E [3 o 2 = DEN Ss o = 2 Ss) g 9 ogtz ã 5 ã H 3 zoo% 8 = si É ô m E) 3> = “o | = E l« S * ES) 5 If E en / 2S, 8 5 2 o E so 2 DS, = o 5 $ 2: 8 = = Ss z 3 vv Ss 3 $ F ã £ CT ã 2 & 2 = os 7 2 E & s 3 = na oooo nes oa <o & e SN Zz and QN: ”D oh 5 À S -“ ”“ 8 - It is soe | SE and E | = Es ã; = E SE = o ê 20º 388 O ê 318 o EE) is 1 8 o SS S: -: E ã oe ê ss & 8 PR 2 3: E ) =: 3 5 use = P 8 = 5 - o 2 7 =. = Z 8 5 ã E & 8 É z Ê 4 She EE ã E. 8 HA ss << | O s 8 $ ê ee & z 3 ê ê. “- 7 E ooo = as | NV = 8 2 5 o + Z 8 2 ê = Oo>" oo 8 oo q o 3 q - a:: o 2 ã $; al a | / *:. IS IF | is $: r. 2:: = So E ss ê ê: O r Pr.
Í230 D E & Es a So | e 3 8 oo õ 2 8 a z Vs Se = s 8 Fs ã 2 ã 5 3 ê = E ã $; ê z E 2 3 o - * Í '3 Ss a
Registered MDD Record (EXAMPLE LTE) RSRP / RSRO ro jeos RSRP / RSRQ RSRP FIG. 17A (0) ao, «E» Is 2 ”Macro cell” Macro cell | S (ECGIH11 / PCIH1) (ECGIH22 / PCItt2) f | It is a hole if it is covered by JR ce, X o - RE, and 6 £ É
NAT Mest aco FIG.17B 7 Macro party Light cell “É *
CCD: NELAS DEL 08N | % & - Í Su 5 | *, t0O Furodecobertura º *, v o “. PN TA2:
- 2 - - o = = ES ao o = = X s g Ns 7 co - Di a E) o Õ 3 É 8 a = '8 E = ns u. 8 se | o gE o8 “. o - Eb ã 8 6 ão & z gs so 2 2 E ESA a E 5th o E Es Ss E PEê & Pr E es o [2 ã E & E | - | | N 8 | S ENE | o 8 = o o rr DP T | 9 & on s 8) / a |; $% ls> 2 o E E (5 8 E E | o 20 5 <<) o o * o o * E 2 o = 8 o It is 3 5 2 7 o One
C Ss Eru <o o 8 and 2 7 = o FZ O 2. * D = oO = =: o ”= o P s oO q = S a Is ss Ss. ê ENYA 2 9 £ E> sw 8 oa S q É oi = Ed o = 3 kb 5 (3 2 Es = = e 2 in the o. É | yr 270 e Ft 8: É PAãs at INSS o 5 PE z <3 ã 2 E at <s 8 = - v 2 SH E = s É zÚ 8 2 Ê ã z 'E Ê 5 ã 3 &
- o —- ao o <s o s | = = Ns 2: Links: | Ss e 8 é) / 8 |) | ês & é Ê: 2 2 = $ if with NS) 888 if the 8 s EU fee ã 2 os. sSES SO = o SE = o> E 8 ê $ ÊS not you s & FE sº E 8 S sos 3 ds ã “E ê E | o º =) 8 2 & = o o = DD - o Tr & ”= (O) | | 3 “e 3> 2 ã 2 & õ FE | 2nd E | E | oO v 2 o ”õ sc> << 8 E Ss E Dr o = 3 & = & oO is | 8 / | 3 |) | the 8th = Lu.
L ———— = 2 s 2 S o 2 z <so PD == oO DER QE / O = o & E o o e | º 3 Ss Oo mr qd <= 2 o ã z ã - <7 ”s ã % É ôlz a 5 Ss 3 6 ló [e E É 2 = õ É 2 O) 8 ES $ go 68 “e E 8 5 = Ss vv <ê ã É 3 3 2 | 3 & 3 * E E q 's E T 8 o N a o
. . Macro 1 Macro 2 | | ev | S51 | ENB / RNC1 | eNB2 / “RNC2 8 É Idle MDT configuration + measurement and registration configuration CH o NO ME S $ 52-1 Measurement, csc registration EEE (non-member) H cell reselection / update eNB / HNB
LC
O 8 CSG cell detection (non-member) o] sas en refers to and flights O | CH detection, "OOS" register S55 Lo 2. ss7 [CO = ns: S58 Measurement, v register | S59 record recovery
Recorded MDT Recorded (LTE EXAMPLE) Ew! [| | to |% 22 | RSRP / RSRQ RSRP RSRP / RSRQ RSRP 2 | - joos leo RSsRP = | RSRPRSRa | and | RSRP - | FIG21A Ge »SS” - (ECGHAIPEIA) (FCGM22IFCIA2): t3 1 2 sa. DL ONE) Is CO o): O.
Non-member CSG cell '(ECGIH200 / PCIH20) FIG.21B and «>» «E» [Jensicétua 1 monthly Cover hole N 3 vE E oscillating ”A, tl and t = to: FIG.22 2
"ae i" i nu o l | 23/23 | and v | | («<S)" <& X Cell Cell É) Í Pp es Té. SAN ER à e CSG Cell not member (not allowed for this EU) FIG.23A Co »“ FP Cell 1 and Em É). Í TOS Cell 2, LEAR ns
ON y SE E o 9 = AE Blacklist ax cell (not allowed for this EU) FIG.23B -

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引用文献:

---

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

---

---

US6445917B1|1999-05-19|2002-09-03|Telefonaktiebolaget Lm Ericsson |Mobile station measurements with event-based reporting|

---

US8175587B2|2003-07-10|2012-05-08|Motorola Mobility, Inc.|Obtaining service when in a no-coverage area of a communication system|

---

US7437176B1|2005-03-15|2008-10-14|Sprint Spectrum L.P.|Method and system for reducing pilot pollution by systematically adjusting sector power allocations|

---

JP4758294B2|2006-07-10|2011-08-24|株式会社日立製作所|Area quality information acquisition system|

---

CN101420711A|2007-10-22|2009-04-29|华为技术有限公司|Method, the Apparatus and system of metrical information, detection covering problem are provided|

---

EP2219413A1|2007-12-05|2010-08-18|Panasonic Corporation|Communication system, resource management device, wireless base station and wireless communication terminal|

---

US8260206B2|2008-04-16|2012-09-04|Qualcomm Incorporated|Methods and apparatus for uplink and downlink inter-cell interference coordination|

---

EP2351410B1|2008-10-10|2015-01-14|Nokia Solutions and Networks Oy|Apparatuses, methods and program providing a confidence estimation of coverage hole detection|

---

WO2010109302A1|2009-03-23|2010-09-30|Nokia Corporation|Measurement configuration and reporting of csg cells in connected mode|

---

US20100311421A1|2009-06-05|2010-12-09|Tomasz Mach|Methods and Apparatus for Communications Terminal Enabling Self Optimizing Networks in Air Interface Communications Systems|

---

KR101707683B1|2009-06-24|2017-02-16|엘지전자 주식회사|Method of transmitting a measurement report in a wireless communication system|

---

KR102008781B1|2010-01-07|2019-08-08|닛본 덴끼 가부시끼가이샤|Radio terminal, radio base station, method of radio terminal, and method of radio base station|

---

EP2604064B1|2010-08-12|2016-10-26|LG Electronics Inc.|Apparatus and method of reporting logged measurement in wireless communication system|US20110090820A1|2009-10-16|2011-04-21|Osama Hussein|Self-optimizing wireless network|

---

US9185580B2|2010-10-10|2015-11-10|Lg Electronics Inc.|Method and device for performing a logged measurement in a wireless communication system|

---

WO2012093583A1|2011-01-07|2012-07-12|三菱電機株式会社|Communication system|

---

US20130094374A1|2011-10-14|2013-04-18|Qualcomm Incorporated|Method and apparatus for virtual adaptive uplink attenuation|

---

WO2013066679A1|2011-11-04|2013-05-10|Interdigital Patent Holdings, Inc.|Methods, apparatus and systems for minimization of drive testsbased on qos verifications|

---

US9258719B2|2011-11-08|2016-02-09|Viavi Solutions Inc.|Methods and apparatus for partitioning wireless network cells into time-based clusters|

---

HUE047508T2|2012-09-19|2020-04-28|Nokia Solutions & Networks Oy|Providing a reason for suspending minimization of drive testsmeasurements from a user equipment to a base station|

---

US8818351B1|2012-10-30|2014-08-26|Onasset Intelligence, Inc.|Method and apparatus for tracking a transported item while accommodating communication gaps|

---

JP6164847B2|2013-01-09|2017-07-19|株式会社Ｎｔｔドコモ|Wireless base station|

---

JPWO2014162711A1|2013-04-01|2017-02-16|日本電気株式会社|Radio parameter control method and apparatus, network operation management apparatus, and radio base station|

---

WO2014162722A1|2013-04-01|2014-10-09|日本電気株式会社|Wireless-parameter control method and system, network operation/management device, and wireless station|

---

WO2014198013A1|2013-06-09|2014-12-18|华为技术有限公司|Wireless communication method, user equipment and network node|

---

US20160205575A1|2013-08-15|2016-07-14|Lg Electronics Inc.|Method for making quality measurement report by terminal and terminal using same|

---

CN104581777A|2013-10-28|2015-04-29|中国移动通信集团公司|Method, device and system for measuring minimization of drive tests|

---

IN2014CH00236A|2014-01-20|2015-07-31|Samsung R & D Inst India Bangalore|

---

US20170251512A1|2014-01-31|2017-08-31|Nokia Technologies Oy|Configured condition for radio resource control connection re-establishment procedure|

---

EP3122091A4|2014-03-20|2017-10-11|Kyocera Corporation|Mobile station, measurement control method, processor, and base station|

---

US10075866B2|2014-12-08|2018-09-11|Industrial Technology Research Institute|Accessing failure event reporting method, user equipment, method for adjusting access control mechanism, control node|

---

JP6415688B2|2014-12-15|2018-10-31|華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ．|Processing method and apparatus for implementing high-frequency communication, and device|

---

JP6493416B2|2015-01-15|2019-04-03|株式会社リコー|Control system, communication terminal, communication system, control method, and program|

---

JP6536068B2|2015-02-19|2019-07-03|株式会社リコー|Control system, communication system, control method, and program|

---

US9113353B1|2015-02-27|2015-08-18|ReVerb Networks, Inc.|Methods and apparatus for improving coverage and capacity in a wireless network|

---

US9596609B2|2015-03-11|2017-03-14|Wipro Limited|Methods and systems for determining radio coverage in wireless communication networks|

---

US20180014212A1|2015-06-16|2018-01-11|Mitsubishi Electric Corporation|Satellite communication device, management device, monitoring system, and monitoring method|

---

US9913154B2|2015-07-21|2018-03-06|Symbol Technologies, Llc|Wireless local area network coverage hole detection using mobile communication devices|

---

US10993131B2|2015-09-24|2021-04-27|Lg Electronics Inc.|Method for performing logging by terminal in wireless communication system and terminal using same|

---

TWI625064B|2016-03-07|2018-05-21|財團法人工業技術研究院|Method, apparatus and system for managing transmission of notification messages|

---

CN107343291B|2016-04-28|2021-11-12|中兴通讯股份有限公司|Antenna feeder system detection method, device and base station|

---

CN107645392B|2016-07-20|2020-07-10|电信科学技术研究院|Communication method and device between user equipment, and communication control method and device|

---

GB2568842B|2016-10-04|2020-08-05|Reliance Jio Infocomm Ltd|A system and method for mitigating a coverage hole from a coverage area|

---

KR101915469B1|2016-11-29|2018-11-06|에스케이텔레콤 주식회사|Method for providing of streamming service and apparatus for the same|

---

US10856163B2|2017-07-07|2020-12-01|Lg Electronics Inc.|Method for performing measurement and device supporting the same|

---

CN110035567B|2018-01-11|2021-05-28|维沃移动通信有限公司|Reference signal measuring method and user terminal|

---

CN111937427A|2018-04-02|2020-11-13|Lg 电子株式会社|Method for constructing recorded measurement entries and device for supporting the method|

---

CN108990095B|2018-07-28|2020-10-16|华中科技大学|Wireless network coverage blind area detection method|

---

GB2576918A|2018-09-06|2020-03-11|Tcl Communication Ltd|Network reporting in a cellular network|

---

EP3952412A1|2019-03-27|2022-02-09|Ntt Docomo, Inc.|Terminal|

---

WO2021145805A1|2020-01-17|2021-07-22|Telefonaktiebolaget Lm Ericsson |Communication methods and related communication devices and nodes|

法律状态:
2020-11-10| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04W 24/10 , H04W 16/18 , H04W 84/10 Ipc: H04W 24/10 (2009.01), H04W 24/08 (2009.01) |

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2020-11-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-02-23| B11B| Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements|

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2021-12-07| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

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申请号 | 申请日 | 专利标题

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JP2010224388|2010-10-01|

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JP2010-224388|2010-10-01|

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PCT/JP2011/072570|WO2012043796A1|2010-10-01|2011-09-30|Wireless communication system and method, wireless terminal, wireless station, and operation management server device|

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