method for processing a measurement task in a carrier aggregation system and system for processing a

专利摘要:
method for processing a measurement task in a carrier aggregation system and system for processing the measurement task in a carrier aggregation system. The present invention provides a method for processing a measurement task in a carrier aggregation system which includes: deleting all measurement tasks for a source secondary cell (scell); or delete a measurement task for a scell in a deleted source scell; or do not delete a measurement task related to the source scell when a source scell is returned to another frequency having a measurement object, and modify a measurement object corresponding to the measurement task related to the source scell to a measurement object of the frequency repaid. when a source pcell and a target pcell are at different frequency and the measurement object corresponding to the measurement task is a frequency where the source pcell is when the frequency at which the target pcell is the measurement object, the measurement object is modified to a measurement object of the frequency at which the target pcell is; and when the measurement object corresponding to the measurement task is the frequency at which the target pcell is, the measurement object is changed to a measurement object of the frequency where the primary cell (pcell) source is. the present disclosure presents a system for processing a measurement task in a carrier aggregation system. the present disclosure effectively decreases a configuration signaling of a measurement task and increases the air interface resource utilization rate.
公开号:BR112012027881B1
申请号:R112012027881-9
申请日:2011-02-15
公开日:2021-07-06
发明作者:Zhongming Chen；Yada Huang
申请人:Zte Corporation；
IPC主号:

专利说明:

TECHNICAL FIELD
The present disclosure relates to a measurement task processing technology, and particularly to a method and system for processing a measurement task in a carrier aggregation system. BACKGROUND
A Radio Resource Control (RRC) layer of a Long Term Evolution (LTE) system is fundamentally responsible for issuing, paging, radio resource control, call and management and reporting and terminal metering control. When an RRC is performing radio resource control, link and management, an RRC downlink message sent by an eNB to a User Equipment (UE) is sent to the UE on a Physical Downlink Shared Channel Scheduled resource ( PDSCH) after the PDSCH resource is dynamically scheduled through a PDSCH. In order to reduce the overall cost of the PDSCH resource of the RRC downlink message, in the LTE system, the RRC downlink message is sent by means of delta signaling setup, i.e., after receiving the RRC message, based on the information of the original configuration, the UE adds, deletes or modifies part of the configuration according to the delta signaling to acquire a completely new configuration, and most of the unmodified configuration information can be sent without using an air interface, thus saving the resource of air interface. Fig. 1 is a flowchart showing a transition in an LTE system. As shown in Fig. 1, in the LTE system, after making a transition decision to carry out the transition, the source base station sends a transition request command to a target base station via an X2 interface between the base stations or an SI interface between the base stations and a Mobility Management Entity (MME), in which context information from the UE at the source base station is carried in the command; after receiving the transition request command, the target base station sends the configuration information for the UE to the source base station via a transition request response command; after receiving the transition request response command, the source base station sends the configuration information to the UE from the target base station to the UE via a transition command; and after receiving the transition command, the UE accesses the target base station according to the configuration information in the command and sends a transition completion command to the target base station after successfully accessing the target base station. Fig. 2 is a flowchart showing an RRC reconstruction in an LTE system, as shown in Fig. 2 , when determining to perform RRC reconstruction, the UE sends an RRC reconstruction request to a serving base station; after receiving the RRC reconstruction request, the serving base station sends an RRC reconstruction command to the UE; and the UE performs the RRC reconstruction and returns an RRC reconstruction completion message to the base station after the RRC reconstruction is completed successfully; and the base station will generally perform an RRC reassignment process again after the RRC reconstruction is complete.
In an on state, a measurement-specific process is that: a network side sends a measurement control message to a UE, where the measurement control message contains a measurement identity, a measurement object, a configuration and other measurement-related attribute and the measurement identity associates the measurement object with the reporting configuration to form a complete measurement task. The measurement object contains the attributes (eg carrier frequency, a list of neighboring cells and the like) of the measurement object, only one measurement object can be configured for each carrier frequency; and the report configuration contains the attributes (for example, event trigger or periodic report, definition of a triggered event (Al, A2 . . . ) time report and the like) of the report configuration. The UE performs a measurement and an evaluation according to the measurement object and the report configuration contained in the measurement control message, generates a measurement report according to the measurement result, and transmits the measurement report next to network.
In order to reduce the overall cost of transition and the reassignment of RRC signaling after the RRC is rebuilt, the UE performs the following processing (hereinafter referred to as measurement task processing) in relation to the measurement task during the process of a pilot frequency transition or reconstruction: when a Measurement Object (MO) configured by a serving cell (a cell before the transition or reconstruction, referred to as the source side) to a UE contains the carrier frequency of a target cell (one cell after the transition or reconstruction, referred to as target side), the UE processes the carrier frequency measurement object on which the serving cell is and the carrier frequency measurement object on which the target cell is, i.e. a corresponding measurement identity to a carrier frequency measurement object in which the source serving cell is, it is made to correspond to the carrier frequency measurement object in which the target cell is after the pro. cessation of measurement task is performed and a measurement identity corresponding to a measurement object of the carrier frequency in which the target cell is is matched to the measurement object of the carrier frequency in which the source server cell is after processing the measurement task be performed, as shown in Fig.3, otherwise the measurement task corresponding to the measurement object of the carrier frequency in which the source serving cell is is deleted. Fig.3 is a flowchart showing a measurement task processing in an LTE system, and as shown in Fig. 3, the measurement task processing process being in specific as follows: the carrier frequency on which a source cell (ie, the server cell shown in Fig. 3) has two measurement tasks which are respectively MID#0 (MO#0+RC#0) and MID#1 (MO#0+RC#1), and the carrier frequency at which there is a target cell (ie, the target cell shown in Fig. 3) has a measurement task that is MID#2 (MO#1+RC#2). The process is as follows: the two measurement tasks MID#0 and MID#1 of MO#0 correspond to MO#1, that is, a new MID#0 (MO#1+RC#0) and a new MID #1 (MO#1+RC#1) ; and the measurement task MID#1 of MO#1 corresponds to MO#0, that is, a new MID#2 (MO#0+RC#2).
The measurement task processing process is briefly described taking the transition as an example. The measurement task configuration information of the UE at the source base station is performed in the transition request command sent from the source base station to the target base station, after receiving the transition request command, the target base station performs the processing. of the aforementioned measurement task if the transition request is the pilot frequency transition, and then configures a new measurement task (which is completed via delta signaling) for the UE based on the processed measurement task, where the new measurement task is contained in a command to respond to the transition request to be forwarded to the UE via the source base station; after receiving the transition command, the UE performs the measurement task processing first and then performs the new measurement task contained in the delta signaling configured by the source base station. In that way, the final measurement tasks of the UE and the target base station are consistent, moreover, as the new measurement task configured by the target base station for the UE is only a delta signaling, the air interface resource can be saved .
In order to provide a higher data throughput to a mobile user, an Advanced Long Term Evolution (LTE-A) system has proposed a Carrier Aggregation (CA) technology, the purpose of which is to provide greater bandwidth to the UE with the corresponding ability to increase the EU maximum rate. In the LTE system, the maximum downlink transmission bandwidth supported by the system is 20MHz, while AC technology aggregates two or more Component Carriers (CC) in order to support a transmission bandwidth greater than 20MHz , but less than 100 MHz. The UE of the LTE-A system with the CA capability can send and receive data from several CCs at the same time, and if not specifically mentioned, the UE described hereinafter refers to the UE of the LTE-A system. In the LTE-A system, a UE in a connected state is able to communicate with a source base station via several CCs (eg CC1, CC2) at the same time and specifically identify a carrier via a component carrier identity as CC ID The base station designates a Primary Component Carrier (PCC) to the UE through an explicit configuration or according to a protocol agreement, and other component carriers are referred to as Secondary Component Carriers (SCO; and the serving cell in the PCC is referred to as Primary Cell (Pcell) and the serving cell in the SCC is referred to as Secondary Cell (Scell) Non-Access Stratum (NAS) information is acquired (eg information such as Global Cell Identification (EGCI), Area Identity (TAI) and the like) by Pcell; and if a Radio Link Failure (RLF) occurs in a downlink Pcell, the UE has to perform RRC reconstruction. After the UE accesses a network in idle state and enters in the on state, the accessed cell is the Pcell. When the UE is in the on state, a network side can complete the transition of a Pcell through RRC reallocation or an intra-cell transition, or the network side designates the Pcell during the proc that of informing the UE to carry out the transition. Thus, a serving carrier aggregation cell and a neighboring carrier aggregation cell can both contain multiple carriers, and there is uncertainty in the principle of measurement task processing in the LTE system; however, no solution has been recorded in the current standards or proposed to solve this problem. This uncertainty can cause a difference between the measurement task configuration performed by the target base station and the measurement task configuration perceived by the UE, thus causing chaos during the measurement process, such that the base station side cannot acquiring a complete measurement result, causing waste of system resources, as the UE side performs a measurement process in error.
Measurement events defined in the LTE system are: an event Al (the serving cell signal quality is greater than a designated threshold), an event A2 (the serving cell signal quality is less than a designated threshold), an event A3 (neighbor cell signal quality is a designated deviation greater than that of the serving cell), an event A4 (neighbor cell signal quality is greater than a designated threshold) and an event A5 (signal quality from the serving cell is less than a threshold designated 1 and the signal quality of the neighboring cell is greater than a threshold designated 2); where event A4 is not related to the serving cell, as such, the definition in event A4 remains unchanged in the LTE-A system. Events Al and A2 are measurement events oriented towards a serving cell; as such, in the LTE-A system, each serving cell (Pcell or Scell) has a task of measuring event 1 and event 2; A3 and A5 events can have the following two types: an A3 co-frequency event (or referred to as an A3-SCC) or an A3/A5 event. Cofrequency event A3 is defined as follows: the frequency of the measurement object is the frequency where there is a configured component carrier (PCC and/or SCC), a reference cell is a Scell or Pcell at the frequency of a corresponding measurement object, and the signal quality of a neighboring cell is a designated deviation greater than that of the serving cell which has the same frequency point as the neighboring cell; and event A3 is defined as follows: the frequency of the measurement object refers to all frequencies (including frequencies at which a PCC and an SCC are operating), the reference cell is a Pcell, and the quality of the neighbor cell signal (if the Scell is at the frequency of the measurement object, then the Scell is treated as the neighbor cell) is a designated shift greater than that of the Pcell. Similar to the A3 co-frequency event, an A5 co-frequency event is defined as follows: the frequency of the measurement object is the frequency where the configured component carrier (PCC and/or SCC), the cell, is reference is a Scell or Pcell at the frequency of the corresponding measurement object, the signal quality of the serving cell is less than the designated threshold 1, and the signal quality of the neighboring cell is greater than the designated threshold 2; similarly to event A3, event A5 is defined as follows: the frequency of the measurement object refers to all frequencies (including frequencies where there is a PCC and a SCO, the reference cell is the Pcell, the signal quality of the serving cell is lower than the designated threshold 1, and the signal quality of the neighboring cell (if a Scell is at the frequency of the measurement object, then the Scell is treated as the neighbor cell) is higher than the designated threshold two.
As there can be multiple serving cells (only one Pcell, or one Pcell and one or more Scell) in the LTE-A system, the measurement task transition method cannot be used by a single serving cell in an LTE system during the process of transition or reconstruction. SUMMARY
With this in mind, the main objective of the present disclosure is to provide a method and a system for processing a measurement task in a carrier aggregation system, so as to allow a UE to process a measurement task on a target side and a source side in time and quickly.
To achieve the above purpose, the technical solution of the present disclosure is carried out as follows.
A method for processing a measurement task in a carrier aggregation system may include: an operation of the measurement task related to a Scell: (1) delete each measurement task related to the Scell, or (2) if an original Scell is deleted by deleting the measurement task related to the original Scell, and modifying, if the original Scell is reassigned to another frequency where there is a measurement object, the measurement object corresponding to the measurement task related to the original Scell for the object of measurement of reassigned target frequency; otherwise, deleting the Scell-related measurement task, where the deletion and reassignment assume a Scell identity (ID) as an identity; or (3) for a certain original Scell, delete the measurement task related to the certain original Scell if a new Scell is on the same frequency as a frequency where the said certain original Scell is not found after configuration, and keep the task measurement related to Scell in another scene.
Processing the measurement task related to a non-Scell can be performed as follows: (1) performing the measurement task processing for a Pcell related measurement task and keeping the measurement task related to a non-server cell ; or (2) uniformly perform non-Scell related measurement task processing; the above measurement task processing may specifically include that: modify, when the measurement object configured by the source base station for a UE contains the carrier frequency of a new Pcell and when the measurement object related to the measurement task is the frequency where there is a target Pcell, if the original Pcell and the new Pcell are at different frequencies, a corresponding measurement object for the frequency measurement object where the new Pcell is; and modify, when the measurement object related to the measurement task is the frequency where there is the source Pcell, the measurement object to a measurement object of the frequency where the new Pcell is; otherwise, delete the measurement task corresponding to the frequency where the source Pcell is.
Wherein, the above serving cell-related measurement task (Pcell or Scell) can be defined as follows: the serving cell-related measurement task may be a measurement report that is required to carry the measurement quantity of the serving cell when being reported; when the serving cell participates in the triggering of a measurement task event, for example, when the parameters that serve as the triggering condition of the measurement event (including an input condition and an output condition) include the measurement quantity of the cell server, measurement events are classified into two types of events: the measurement task reflecting the measurement result of the serving cell, and the measurement task reflecting the measurement results of the serving cell and neighboring cell. 1) when the server cell participates in triggering the measurement task event, the measurement task reflecting the server cell's measurement result reports the measurement report when the server cell's measurement result meets a condition, which it refers to, by for example, to a condition that the measurement result of the serving cell is greater or less than a threshold; the specific measurement configuration can be a measurement task that takes the frequency at which the serving cell is as the measurement object and takes event Al and A2 as reporting configuration. 2) when the server cell participates in triggering the measurement task event, the measurement task reflecting the measurement results of the serving cell and neighboring cell is a measurement task that reports a measurement report when the cell measurement results server and neighboring cell fulfill a condition and/or when the measurement result results from the neighboring cell fulfilling a condition. 2.1) the condition for reporting the measurement report when the measurement results of the serving cell and the neighboring cell meet the condition may be a condition that is met by a relative size of the measurement result of the neighbor cell in relation to a measurement result of the serving cell, or a condition which is respectively fulfilled by the measurement result of the neighboring cell and the measurement result of the serving cell. 2.1.1) the above may refer that the measurement result of the neighboring cell is a deviation greater or less than that of the serving cell, for example, a measurement task where the specific measurement object configured is frequency where there is a neighboring cell for which the reporting configuration is event A3 or event A3-SCC. 2.1.2) the above may refer to the neighboring cell's measurement result being greater than a threshold 1, while the serving cell's measurement result is less than a threshold 2, eg a measurement task that the specific measurement object configured is the frequency at which the neighboring cell is and for which the reporting configuration is event A5 or event A5-SCC. 3) when the serving cell does not participate in triggering the measurement task event, a condition to report the measurement task that carries the measurement result of the serving cell when the measurement result of the neighboring cell meets the condition is that the result of Neighbor cell measurement is greater or less than a threshold, for example, a specific configuration may be a measurement task associated with the corresponding serving cell, of which the measurement object is the frequency at which the neighboring cell is and from which the reporting setting is that neighbor cell measurement result is greater (for example, an A4 event) or smaller than a threshold, and the measurement report that carries the corresponding serving cell measurement result is reported when the neighbor cell complies the condition.
Preferably, the method may further include: maintaining a measurement task of which the measurement object is the exclusive carrier frequency of the primary carrier frequency and the secondary carrier frequency when the measurement task of which the measurement object is an exclusive carrier frequency of the primary carrier frequency and the secondary carrier frequency exists.
Preferably, the steps of maintaining a measurement task of which the measurement object is the exclusive carrier frequency of the primary carrier frequency and the secondary carrier frequency specifically when the measurement task of which the measurement object is an exclusive carrier frequency of the frequency primary carrier and the secondary carrier frequency exists may specifically include: for the secondary carrier frequency which is the same as the frequency where there is the source side Scell and the target side Scell, maintaining the measurement task of which the measurement object is the said secondary carrier frequency; and for the secondary carrier frequency which is different from the frequency where there is the source side Scell and the target side Scell, keeping the measurement task related to the Pcell in the measurement tasks at said secondary carrier frequency.
A method for processing a measurement task in a carrier aggregation system may include: deleting a measurement task for which a measurement object is a carrier frequency where there is a source-side Scell and/or a target-side Scell ; or maintain, for the secondary carrier frequencies where there is the source side Scell and the target side Scell, a measurement task for which the measurement object is said secondary carrier frequency. In specific, the method may further include: deleting the measurement task for which the measurement object is the carrier frequency at which there is the source-side Scell or the target-side Scell; or, for the secondary carrier frequencies where there is the source side Scell and the target side Scell, keep the measurement task for which the measurement object is the secondary carrier frequency and delete the measurement task for which the object measurement is the carrier frequency at which there is another Scell on the source side and another Scell on the target side.
When a source Pcell and a target Pcell are at different frequencies and the frequency at which the target Pcell is the measurement object, for the measurement task for which the measurement object is the carrier frequency at which the Pcell is on the side source, the measurement object is changed to a measurement object of the frequency where the target Pcell is, and for a measurement task for which the measurement object is the carrier frequency where the target Pcell is, the measurement object is modified for a frequency measurement object where the source Pcell is.
The previous two steps must be performed in sequence. Another measurement task except the aforementioned measurement tasks is maintained.
A system for processing a measurement task in a carrier aggregation system may include: an erasure unit, configured to erase all measurement tasks related to a source Scell; or delete a measurement task related to a Scell in a deleted source Scell.
Preferably, the system may further include a reallocation unit and a modification unit, wherein the reallocation unit is configured to reallocate the source Scell to another frequency where there is a measurement object; the erasure unit does not erase the measurement task related to the reassigned source Scell; and the modification unit is configured to modify the measurement object corresponding to the measurement task related to the source Scell to the measurement object of the reassigned frequency.
Preferably, the process in which the source Scell is erased can include that: after configuration, there is no new Scell on the same frequency as a frequency where there is an erased source Scell; or that there is no bearer identity corresponding to a source Scell.
Preferably, the process in which a source Scell is reassigned to another frequency on which the measurement object is may include that: the carrier identity of the source Scell remains unchanged and the frequency of the source Scell is changed.
Preferably, the modification unit can be further configured to: modify, when the measurement object configured by the source base station for a UE contains a carrier frequency of a new Pcell and the measurement object related to the measurement task is a frequency where there is a target Pcell, a measurement object corresponding to a frequency measurement object where there is a new Pcell; and modifying the measurement object to the frequency measurement object where there is the new Pcell when the measurement object related to the measurement task is the carrier frequency where there is a source Pcell; otherwise, delete the measurement task corresponding to the frequency at which the source Pcell is; where the source Pcell and the target Pcell are at different frequencies.
Preferably, the system may further include: a standby unit, configured to, when there is a measurement task for which the measurement object is a carrier frequency exclusive of the source primary carrier frequency and the secondary carrier frequency, to maintain the task of measurement. A system for processing a measurement task in a carrier aggregation system may include a scavenging unit, a backup unit, and a modify unit, wherein the scavenging unit is configured to delete a metric task for which a measurement object is a frequency where there is a Scell on the source side and/or a Scell on the target side; the reserve unit is configured to maintain, for the secondary carrier frequency which is the same as the frequency where there is the source side Scell and the target side Scell, the measurement task for which the measurement object is the secondary carrier frequency ; and the modification unit is configured to modify, when a frequency at which there is a Pcell is a measurement object, the measurement object to a measurement object from the frequency where there is the target Pcell for the measurement task for which the object measurement is the carrier frequency where the source-side Pcell is, and modify the measurement object to a measurement object of the frequency where a source Pcell is to the measurement task for which the measurement object is the carrier frequency where is the target Pcell; where the source Pcell and the target Pcell are at different frequencies.
A system for processing a measurement task in a carrier aggregation system may include: an erasure unit configured to, when a Scell is deleted, delete a measurement task related to the Scell, or delete a measurement task for which a measurement object is a carrier frequency where the Scell is.
In the present disclosure, by defining a rule for the measurement task processing of a source side and a target side, the problem of uncertainty in measurement task processing that exists in a carrier aggregation system during the transition process or reconstruction is resolved, furthermore, a set-up signaling for the measurement task is effectively lowered, the air interface utilization rate is improved, and a good user service experience is provided. BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a flowchart showing a transition in an LTE system; Fig. 2 is a flowchart showing an RRC reconstruction in an LTE system; Fig. 3 is a flowchart showing a process of a measurement task processing in an LTE system; Fig. 4 is a schematic diagram showing a transition of a UE from a cell 1 to a cell 2, in accordance with the present disclosure; Fig. 5a is a schematic diagram showing a process of a measurement task processing before the transition shown in Fig. 4 in accordance with the present disclosure; Fig. 5b is a schematic diagram showing a measurement task processing before the transition shown in Fig. 4 in accordance with the present disclosure; Fig. 5c is a schematic diagram showing a process of a measurement task processing after the transition shown in Fig. 4 in accordance with the present disclosure; Fig. 6 is a schematic diagram showing a reconstruction of a UE from a cell 1 to a cell 2, in accordance with the present disclosure; Fig. 7a is a schematic diagram showing a process of a measurement task processing before the reconstruction shown in Fig. 6, in accordance with the present disclosure; Fig. 7b is a schematic diagram showing a process of a measurement task processing during the reconstruction shown in Fig. 6, in accordance with the present disclosure; Fig. 7c is a schematic diagram showing a process of a measurement task processing after the reconstruction shown in Fig. 6, in accordance with the present disclosure; Fig. 8 is a schematic diagram showing a transition of a UE from a cell 1 to a cell 2, in accordance with the present disclosure; Fig. 9a is a schematic diagram showing a process of a measurement task processing before the reconstruction shown in Fig. 8, in accordance with the present disclosure; Fig. 9b is a schematic diagram showing a process of a measurement task processing during the reconstruction shown in Fig. 8, in accordance with the present disclosure; Fig. 9c is a schematic diagram showing a process of a measurement task processing after the reconstruction shown in Fig. 8, in accordance with the present disclosure; Fig. 10 is a schematic diagram showing a transition of a UE from a cell 1 to a cell 2, in accordance with the present disclosure; Fig. 11a is a schematic diagram showing a process of a measurement task processing before the reconstruction shown in Fig. 10, in accordance with the present disclosure; Fig. 11b is a schematic diagram showing a process of a measurement task processing during the reconstruction shown in Fig. 10, in accordance with the present disclosure; Fig. 11c is a schematic diagram showing a process of a measurement task processing after the reconstruction shown in Fig. 10, in accordance with the present disclosure; Fig. 12 is a schematic diagram showing a transition of a UE from a cell 1 to a cell 2, in accordance with the present disclosure; Fig. 13 is a schematic diagram showing a transition of a UE from a cell 1 to a cell 2, in accordance with the present disclosure; Fig. 14 is a structural diagram of a system for processing a measurement task in a carrier aggregation system in accordance with embodiment 1 of the present disclosure; Fig. 15 is a structural diagram of a system for processing a measurement task in a carrier aggregation system in accordance with embodiment 2 of the present disclosure; Fig. 16 is a structural diagram of a system for processing a measurement task in a carrier aggregation system in accordance with embodiment 3 of the present disclosure; Fig. 17 is a structural diagram of a system for processing a measurement task in a carrier aggregation system in accordance with embodiment 4 of the present disclosure; and Fig. 18 is a structural diagram of a system for processing a measurement task in a carrier aggregation system in accordance with embodiment 5 of the present disclosure. DETAILED DESCRIPTION
The basic idea of the present disclosure is that during a transition, reconstruction or reassignment, an operation of a measurement task related to a Scell includes: all measurement tasks related to a source server cell Scell are deleted; or the measurement task related to a Scell in an erased source Scell is erased; or when a source Scell is reassigned to another frequency where there is a measurement object, the measurement task related to the source Scell is not deleted, instead a measurement object corresponding to the measurement task related to the source Scell is modified for a reassigned frequency measurement object, otherwise the measurement task related to the Scell is deleted; and an operation of a measurement task related to a non-Scell includes: when a source Pcell and a target Pcell are at different frequencies and the frequency at which the target Pcell is a measurement object, the measurement object is changed to a measurement object of the frequency at which the target Pcell is if the measurement object corresponding to the measurement task related to the Pcell is the frequency at which the source Pcell is; and the measurement object is changed to a measurement object of the frequency where the source Pcell is, if the measurement object corresponding to the measurement task is the frequency where the target Pcell is.
Wherein, the Scell-related measurement task is defined as follows: the Scell-related measurement task is the measurement task reflecting a measurement result from Scell or measurement results from Scell and a neighboring cell; where the measurement task reflecting the measurement result of Scell reports a measurement report when the measurement result of the Scell meets a condition that refers, for example, to a condition that the measurement result of the serving cell is greater or lesser than a threshold; here the serving cell is Scell, and the specific measurement configuration might be that the frequency at which the Scell is is taken as the measurement object and the event Al and A2 is taken as the measurement task from the reporting configuration; where, the measurement task reflecting the results of the Scell and the neighboring cell reports the measurement report when the measurement results of the Scell and the neighboring cell meet a condition and/or reports the measurement task where the measurement result of the Scell is required to be transported when the measurement result from the neighboring cell fulfills a condition; the condition for reporting the measurement report when the measurement results of the Scell and the neighboring cell meet the condition can be a condition fulfilled by a relative size between the measurement result of the neighboring cell and the measurement result of the Scell, or a condition which is respectively fulfilled by the measurement result of the neighboring cell and the measurement result of the Scell; where in the previous condition the measurement result of the neighboring cell is a greater or lesser deviation than the measurement result of the serving cell, for example, the specific setting can be that of the case of a co-frequency event where the object measurement is the frequency at which the neighboring cell (ie the Scell) is, and the reporting configuration is the task of measuring the A3 or A3-SCC co-frequency event, and in the last condition the measurement result of the cell neighbor is greater than threshold 1, while the measurement result of Scell is lower than threshold 2, for example, the specific setting can be that in the event of the co-frequency event the measurement object is the frequency at which is the neighbor cell (ie the Scell) and the reporting configuration is the task of measuring the A5 or A5-SCC co-frequency event; the condition for reporting the measurement task in which the measurement result of the Scell must be carried when the measurement result of the neighboring cell meets the condition is that the measurement result of the neighboring cell is greater or less than a threshold, for example , the specific setting can be that the measurement object is the frequency at which the neighboring cell (ie Scell) is, and the reporting setting is that the measurement result of the neighboring cell is greater than a threshold ( for example, an event A4) while a measurement result of the corresponding Scell is associated, and the measurement report in which the corresponding Scell of the measurement result is carried is reported when the condition is fulfilled by the neighboring cell.
A measurement task related to a non-Scell can be defined in the following two ways: definition 1 is a measurement task reflecting the measurement result of Pcell or the measurement result of Pcell and the neighboring cell; where the specific definition is identical to the definition related to Scell above; and definition 2 is a measurement task other than the Scell related measurement task.
In order to make the object, the technical solution and the advantages of the present disclosure clearer and more evident, the present disclosure will now be described in greater detail, with reference to the embodiments in combination with the accompanying drawings.
During transition, reconstruction or reassignment, a rule for measurement task processing is defined in the present disclosure which includes: the operation of the measurement task related to Scell is that: all measurement tasks related to the source server cell Scell are deleted; or the Scell-related measurement task on the deleted source Scell is deleted; or when the source Scell is reassigned to another frequency where there is a measurement object, the measurement task related to the source Scell is not deleted, but the measurement object corresponding to the measurement task related to the source Scell is changed to the object of the reassigned frequency measurement, otherwise the measurement task related to the Scell is deleted; and the operation of the non-Scell related measurement task is that: when a source Pcell and a target Pcell belong to different frequencies and the frequency at which the target Pcell is a measurement object, in the case of the related measurement task with Pcell, the measurement object is changed to a measurement object of the frequency where the target Pcell is if the measurement object corresponding to the measurement task is the frequency where the source Pcell is, and the measurement object is changed for a measurement object of the frequency where the source Pcell is, if the measurement object corresponding to the measurement task is the frequency where the target Pcell is.
For a more uniform description, in the present disclosure, in case of a transition, a transition from a source-side cell to a target-side cell is performed; in the case of a reconstruction, the source side is a cell in which the UE is located before the reconstruction, and the target side is a cell in which the UE is located after the reconstruction; and in case of reallocation, the source side is a cell in which the UE is located before reconstruction, and the target side is a cell in which the UE is located after reconstruction. Mod 1
Fig. 4 is a schematic diagram showing a transition of a UE from a cell 1 to a cell 2, in accordance with the present disclosure; as shown in Fig. 4, the UE resides in CC2, initiates the establishment of an RRC connection 15 in CC2, accesses a carrier aggregation cell 1 after completing the establishment of the RRC connection, and then enters a connected state, thereby , according to the relevant rule for the carrier aggregation system, CC2 is a PCC and the serving cell in CC2 is a Pcell. Due to the request for services, a network side configures a CC1 for the UE to carry the carrier aggregation, as such presently the component carriers used synchronously by the UE are CC1 and CC2, where CC2 is PCC, CC1 is SCC and Scell is the serving cell in CC1. Fig. 5a is a schematic diagram 25 showing a process of a measurement task processing before the transition shown in Fig. 4, according to the present disclosure, as shown in Fig. 5a, the content of the measurement task before the transition includes: MID#1/2/3, where the carrier frequency of the measurement object is CC1 30 (i.e. the carrier frequency where the SCC is), and the measurement event is Al/A2 /co-frequency A3 of which the trigger condition are respectively that Scell is greater than a threshold or that Scell is less than a threshold or that a neighboring cell is a deviation greater than Scell and that are measurement tasks related to Scell; MID#6/7/8, where the carrier frequency of the measurement object is CC2 (i.e. a carrier frequency where the PCC is), and the measurement event is A1/A2/A3 of which the condition triggers are respectively that Pcell is greater than a threshold or that Pcell is less than a threshold or that a neighboring cell is a deviation greater than Pcell and that they are as such measurement tasks related to Pcell; MID#9, where the measurement object carrier frequency is C4 of a UMTS, the measurement event is a B2 event of which the trigger condition is that Pcell is lower than threshold 1 and a neighboring cell is higher than threshold 2 and which is also a Pcell related measurement task; and MID#4/5, where the carrier frequency of the measurement object is a CC1 (that is, the carrier frequency where the SCC is), the measurement event is A3/A4 where the trigger condition of the A3 event is that a cell in the SCC is a deviation greater than Pcell and that event A3 is a measurement task related to Pcell, and event A4 is asked to report the signal quality of the Pcell after being triggered, as such, the event A4 is also the Pcell related measurement task. All of the 'major', 'minor' and 'offset' comparisons mentioned above have the cell measurement quantity as the reference value.
When the UE advances to a carrier aggregation cell 2, the source base station evaluates the transition to the target base station and changes the UE to the carrier aggregation cell 2. The transition request message sent by the source base station to the target base station contains the task of measuring the UE at the source base station and may further contain information on the carriers presently in use by the UE, such as information about CC1 and CC2, with CC2 being the PCC and the like.
Fig. 5b is a schematic diagram showing a measurement task processing process during the transition process shown in Fig. 4, according to the present disclosure, as shown in Fig. 5b, after receiving the request message of transition from the source base station, the target base station determines that the carrier aggregation cell 2 only uses CC1 which is PCC, and the Pcell is the serving cell in CC1, i.e. the Scell in CC1 is cleared; the process of processing the measurement task related to Scell is as follows: (1) the measurement tasks (MID#l-3) related to the deleted Scell on the source side are deleted, in particular, the corresponding MID is deleted; or (2) in case the Scell is operating the measurement tasks related to those Scell can be deleted together. As there is only one Scell in this modality, the process is identical.
If the above process takes place at a base station then there is no need to send a transition request message, however the internal processing process is the same.
In case an S-Pcell (a Pcell on the source side) and a T-Pcell (a Pcell on the target side) are operating at different frequencies and the measurement object is the frequency (CC1) at which the target Pcell is , the following processing is performed for all measurement tasks (MID#4-9): for a measurement object corresponding to the measurement task (eg MID#6/7/8) which is the frequency (CC2) in which is the S-Pcell, modify the measurement object to a measurement object (MO#2) of the frequency at which the T-Pcell is; and for a measurement object corresponding to the measurement task (eg MID#4/5) which is the frequency (CC1) at which the T-Pcell is, modify the measurement object to a measurement object (MO#1 ) of the frequency at which the S-Pcell is. And another measurement task is maintained as the measurement task (MID#9) of CC4.
According to the measurement processing result shown in Fig. 5b, the target base station configures, to the UE, a delta signaling of a measurement task, for example, adding a measurement task MID#1 (A5 in CC1) , and sends the delta signaling to the source base station via a transition request response message; and upon receipt, the source base station sends it to the UE via a transition command. Through the use of a transition command, the source base station can further inform the UE to delete the Scell in CC1.
After receiving the transition command, the UE deletes the Scell and all existing Scells by itself if the transition command does not give the indication to delete the Scell in CC2 and can delete the measurement tasks related to those Scell together, if they exist. . If the transition command gives indication to delete the Scell in CC1, then the UE deletes the Scell and measurement tasks (MID#1/2/3) related to the Scell in CC1 after receiving the transition command.
After completing the measurement task processing by adopting the same operation as the base station performs first above, and then modifying the measurement configuration according to the delta signaling in the received transition command, the final measurement task result is shown in Fig. 5c.
The UE performs the measurement according to the present measurement task configuration and reports the measurement report to the network side as required, and the network side makes a related decision according to the measurement report. determine the transition from the UE to the CC3 of the target base station, or the target base station determines to set the CC3 to the UE as Pcell, then the measurement task (MID#l-3) related to the deleted Scell on the source side is deleted . In case the S-Pcell (Pcell on the source side) and the T-Pcell (Pcell on the target side) are operating at different frequencies, but there is no measurement object which is the frequency (CC3) in which a Target Pcell, the following processing is performed for all measurement tasks (MID#4-9): delete measurement tasks (eg MID#6/7/8) corresponding to a measurement object which is frequency ( CC2) in which the S-Pcell is, and keeping the other measurement task such as the measurement task (MID#9) of CC4. According to the above measurement result, the target base station configures, for the UE, the delta signaling of the measurement task, for example, adding the measurement object (MO#4=CC3) and synchronously adding the measurement task ( MID #1/2/3) of event A1/A2/A3 in MO#4, and sends the delta signaling to the source base station via the transition request response message; and upon receipt, the source base station sends it to the UE via a transition command. After completing the measurement task processing by adopting the same operation as the base station performs first above, and then modifying the measurement configuration according to the delta signaling in the received transition command, the final measurement task result is the same of the target base station result. Modality 2
Fig. 6 is a schematic diagram showing a reconstruction of a UE from a cell 1 to a cell 2, in accordance with the present disclosure, as shown in Fig. 6 , the UE resides in a CC1 and initiates the establishment of an RRC connection in CC1 accesses an aggregation cell of carrier 1 after completing the RRC connection establishment and then enters a connected state, where CC1 is a PCC and a Pcell is the serving cell in CC1. Due to the demand for services, a network side configures a CC2 for the UE to carry the carrier aggregation, as such, the component carriers currently used in sync by the UE are CC1 and CC2, where CC1 is the PCC, CC2 is the SCC and Scell is the serving cell in CC2. Fig. 7a is a schematic diagram showing a process of a measurement task processing before the reconstruction shown in Fig. 6, according to the present disclosure, as shown in Fig. 7a, the content of the measurement task before of the reconstruction includes: MID#l-3, where the carrier frequency of the measurement object is the carrier frequency where CC1 (ie PCC) is, and the measurement event is Al/A2/co-frequency A3 which can be determined as described in modality 1 and can belong to the measurement task related to Pcell; MID#4-6, where the measurement object is a carrier frequency CC2 ie the carrier frequency on which the SCC is, and the measurement event is A1/A2/CO-frequency A3 which can be determined as described in mode 1 and may belong to measurement tasks related to Scell; and MID#7-11, which can be determined by an analogous determination, to be the measurement task related to Pcell, where when performing the report, MID#11 is asked to perform a measurement quantity related to the Pcell .
The UE needs to initiate an RRC reconstruction when an RLF occurs in the carrier aggregation cell 1. The UE first performs a cell selection and selects a carrier aggregation cell 2 at a CC3 which is the only carrier frequency used in the cell of carrier aggregation 2. CC3 is the PCC, and Pcell is the serving cell in CC3 . At that time, the UE erases the Scell on the source side alone, and/or erases the measurement tasks (MID#4-6) related to the Scell, or performs a processing after receiving the reconstruction message from a target side. Then the UE mimics an RRC reconstruction request to the target side. Fig. 7b is a schematic diagram showing a measurement task during the reconstruction process shown in Fig. 6, according to the present disclosure, as shown in Fig. 7b, after receiving the RRC reconstruction request message from a UE, the target side determines not to configure a CC2 for the UE, as such, according to the rule for measurement task processing defined in the disclosure, the measurement tasks (MID#4-6) related to the Scell in the CC2 on the source side are erased.
An S-Pcell (source side Pcell) and a T-Pcell (target side Pcell) are at different frequencies and the measurement object is the frequency (CC3) at which the Pcell is, the following processing is performed for all measurement tasks (MID#l-3, and MID#7-11): for a measurement object corresponding to a measurement task (eg MID#1/2/3) which is the frequency (CC1) where is the S-Pcell, modify the measurement object to a measurement object (MO#3) of the frequency at which the T-Pcell is; and for a measurement object corresponding to the measurement task (eg MID#8/9) which is the frequency (CC3) at which the T-Pcell is, modify the measurement object to a measurement object (MO#1 ) of the frequency at which the S-Pcell is. Another measurement task is maintained as the CC4 measurement task (MID#10).
Since CC2 is not configured for UE by target side, according to the rule for measurement task processing defined in the revelation, and measurement tasks (MID#4-6) related to Scell in CC2 of source side are deleted, but other measurement tasks (MID#7 and (MID#11) which are related to the Scell and for which the carrier frequency of the measurement object is CC2 are kept. Another measurement task like the CC4 measurement task (MID#10) The target side responds to a rebuild command to the UE, and upon receipt, the UE can delete the measurement tasks (MID#4-6) related to the Scell and can still delete the Scells on the source side by yourself.
For a measurement object corresponding to a measurement task (eg MID#1/2/3) which is the frequency (CC1) at which the S-Pcell is, the measurement object is changed to a measurement object ( M0#3) of the frequency at which the T-Pcell is, and for a measurement object corresponding to a measurement task (eg MID#8/9) which is the frequency (CC3) at which the T-Pcell is , the measurement object is changed to a measurement object (MO#1) of the frequency at which the S-Pcell is. The other measurement tasks (MID#7, MID#11) are kept, whose measurement object is the Scell on the source side (the SCC is the CC2). Other measurement tasks such as the CC4 measurement task (MID#10) are kept. A rebuild completion command is returned to the target side.
According to the result shown in Fig. 7b, the target side sets up delta signaling of a measurement task to the UE, the result of the final measurement task is shown in Fig. 7c; the target side sends the delta signaling to the UE via an RRC reassignment message. The UE performs the configuration of the measurement task in delta signaling, and the result of the final measurement task is the same as shown in Fig. 7c.
If the signal quality of the Scell is requested to be reported, then the measurement task of MID #11 belongs to a measurement task related to Scell and can thus be deleted during the reconstruction process shown in Fig. 7b. Modality 3
Fig. 8 is a schematic diagram showing a transition of a UE from a cell 1 to a cell 2, in accordance with the present disclosure, as shown in Fig. 8 , the UE resides in a CC1 and initiates the establishment of an RRC connection in CC1 accesses a carrier 1 aggregation cell after completing the RRC connection establishment and then enters a connected state. At this point, CC1 is a PCC, and a Pcell is the serving cell in CC1. Due to the demand for services, a network side configures a CC2 for the UE to carry the carrier aggregation, as such, the component carriers currently used in sync by the UE are CC1 and CC2, where CC1 is the PCC, CC2 is the SCC and Scell is the serving cell in CC2.
As shown in Fig. 9a , the UE advances to a carrier aggregation cell 2, the source base station determines to perform a transition to the target base station, namely the transition from the UE to the carrier aggregation cell 2. transition request sent by the source base station to the target base station contains the task of measuring the UE at the source base station, and may further contain information of the carriers currently in use by the UE, such as information about an S-CC1 and an S- CC2, where CC1 is information such as a CCP and the like.
As shown in Fig. 9b, after receiving the transition request message from the source base station, the target base station determines to configure CC1, CC2 and CC3 in carrier aggregation cell 2 for the UE, where CC2 is the CCP. Although the target side has configured CC2 for the UE, as CC2 is the PCC, there is no Scell of the target side of which the carrier frequency is CC2, the measurement tasks related to Scell (MID#4/5/6 ) on the source side CC2 must be erased. Other measurement tasks are retained.
An S-Pcell (source side Pcell) and a T-Pcell (target side Pcell) are at different frequencies and the measurement object is the frequency (CC2) at which the Pcell is, the following processing is performed for all measurement tasks (MID#1/2/3, and MID#7-11): for a measurement object corresponding to a measurement task (eg MID#1/2/3) which is frequency (CC1) where is the S-Pcell, change the measurement object to a measurement object (M0#2) of the frequency where the T-Pcell is; and for a measurement object corresponding to a measurement task (eg MID#7/11) which is the frequency (CC2) at which the T-Pcell is, modify the measurement object to a measurement object (MO# 1) the frequency at which the S-Pcell is.
The measurement tasks (MID#8/9) of the other carrier frequencies (except the primary carrier frequency and the secondary carrier frequency) are maintained.
During the above process, once the Pcell becomes a Scell and the original Scell becomes a Pcell, the measurement tasks (MID#4/5/6) related to the S-Scell can be kept at that time; the S-Pcell (source side Pcell) and T-Pcell (target side Pcell) are at different frequencies, and the frequency (CC2) at which the target Pcell is the measurement object, the following processing is performed for all measurement tasks (MID#1/2/3, and MID#4/5/6/7-ll): for a measurement object corresponding to a measurement task (eg MID#1/2/3 ) which is the frequency (CC1) at which the S-Pcell is, modify the measurement object to a measurement object (MO#2) of the frequency at which the T-Pcell is; and for a measurement object corresponding to a measurement task (eg (MID#4/5/6/7/ll) which is the frequency (CC2) at which the T-Pcell is, modify the measurement object to a measurement object (MO#1) of the frequency at which the S-Pcell is.
According to the result of the above measurement task processing, the target base station configures, to the UE, the delta signaling of a measurement task (for example, configure MID#4/5), and sends the delta signaling to the source base station via a transition request response message; and upon receipt, the source base station sends it to the UE via a transition command.
After receiving the transition command, the UE deletes the Scell related measurement tasks (MID#4/5/6) in the source side CC2.
For a measurement object corresponding to a measurement task (eg MID#1/2/3) which is the frequency (CC1) at which the S-Pcell is, the measurement object is changed to a measurement object ( MO#2) of the frequency at which the T-Pcell is, and for a measurement object corresponding to a measurement task (eg MID#7/11) which is the frequency (CC2) at which the T-Pcell is , the measurement object is changed to a measurement object (MO#1) of the frequency at which the S-Pcell is. The measurement task (MID#8/9) of which the carrier frequency of the measurement object is the Scell of the target side (the SCC is CC3) is maintained, and the measurement tasks of a CC4 are maintained. Then, the measurement task configuration in delta signaling is performed to acquire the final measurement task configuration shown in Fig. 9c. Modality 4
Fig. 10 is a schematic diagram showing a transition of a UE from a cell 1 to a cell 2, in accordance with the present disclosure, as shown in Fig. 10 , the UE resides in a CC1 and initiates the establishment of an RRC connection in CC1 accesses a carrier 1 aggregation cell after completing the RRC connection establishment and then enters a connected state. At this point, CC1 is a PCC, and a Pcell is the serving cell in CC1. Due to the demand for services, a network side configures a CC2 for the UE to carry the carrier aggregation, as such, the component carriers currently used in sync by the UE are CC1 and CC2, where CC1 is the PCC, CC2 is the SCC and Scell is the serving cell in CC2.
As shown in Fig. 11a , the UE advances to a carrier aggregation cell 2, the source base station determines to perform a transition to the target base station, namely the transition from the UE to the carrier aggregation cell 2. transition request sent by the source base station to the target base station contains the task of measuring the UE at the source base station, and may further contain information of the carriers currently in use by the UE, such as information about an S-CC1 and an S- CC2, where CC1 is information such as a CCP and the like.
Upon receiving the transition request message from the source base station, the target base station determines to configure CC1, CC3 and CC4 in carrier aggregation cell 2 for the UE, and indicates that CC3 is the PCC. Since the target side does not configure CC2 for the UE, the measurement task related to Scell (MID#4/5/6) on the CC2 of the source side is cleared, and since the source side does not configure for the UE CC4 and CC1 configured on the target side, the measurement tasks (MID#8-11) whose measurement objects are CC4 and CC1 of the target side are kept. The measurement task (MID#12) of the other carrier frequencies (except the primary carrier frequency and the secondary carrier frequency) is maintained.
An S-Pcell (source side Pcell) and a T-Pcell (target side Pcell) are at different frequencies and the measurement object is the frequency (CC3) at which the Pcell is, the following processing is performed for all measurement tasks (MID#1/2/3, and MID#7-12): for a measurement object corresponding to a measurement task (eg MID#1/2/3) which is frequency (CC1) where is the S-Pcell, modify the measurement object to a measurement object of the frequency where is the T-Pcell; for a measurement object corresponding to the measurement task (eg MID#8/9) which is the frequency (CC3) the T-Pcell is on, modify the measurement object to a measurement object of the frequency it is on to S-Pcell.
As shown in Fig. 11b, the target base station sets the delta signaling of a measurement task (for example, increasing a Scell-related measurement task (the SCC is CC4 and CC1) configured on the target side) to the UE according to the processing result of the measurement task. It is sent to the source base station via a transition request response message, and upon receipt, the source base station sends it to the UE via a transition command.
After receiving the transition command, the UE deletes the measurement task (MID#4/5/6) related to the source Scell (the SCC is the CC2).
For a measurement object corresponding to a measurement task (eg MID#1/2/3) which is the frequency (CC1) at which the S-Pcell is, the measurement object is changed to a measurement object of the frequency at which the T-Pcell is, and for a measurement object corresponding to a measurement task (eg MID#8/9) which is the frequency (CC3) at which the T-Pcell, the measurement object is is changed to a measurement object of the frequency where the S-Pcell is. Scell measurement tasks (SCC is CC4 and CC1) configured for the target side are kept. The tasks of measuring the other carrier frequencies (except the primary carrier frequency and the secondary carrier frequency) are maintained. Then, the measurement task configuration in delta signaling is performed and the final measurement task configuration, as shown in Fig. 11c, is acquired. Modality 5
Fig. 8 is a schematic diagram showing a transition of a UE from a cell 1 to a cell 2, in accordance with the present disclosure; as shown in Fig. 8, the UE resides in a CC1 and initiates the establishment of an RRC connection on a CC1, accesses a carrier aggregation cell 2 after completing the establishment of an RRC connection and then enters a connected state, therefore, according to the relevant rule for the carrier aggregation system, CC1 is a PCC and the serving cell in CC1 is a Pcell. Due to the request to services, a network side configures a CC2 for the UE to perform a carrier aggregation, and simultaneously informs the UE that the Cell Identification (CI) of the CC2 is 1, and the CC1 may have Cl or not, such as such, the component carriers used synchronously by the current UE are CC1 and CC2, where CC1 is a PCC, CC2 is an SCC, and a Scell is a serving cell in CC2.
The base station configures, for the UE, a measurement task for which the measurement object is CC1/CC2/CC3.
During the UE movement process, the source base station finds that the signal quality of the Scell in CC2 gets worse and determines the replacement of CC2 by a CC3, and synchronously informs the UE that the CI of the CC3 is 1 via a command. RRC reassignment, synchronously modifies the measurement object corresponding to the measurement task of the original Scell (in CC2) to the reassigned target frequency (CC3), and sets the delta signaling of a measurement task configuration to the UE based on the configuration of current measurement task.
After receiving the reassignment command, the UE performs the operation related to replacing CC2 with CC3 and carries out the following processing for the measurement task: modify the measurement object corresponding to the measurement task of the original Scell (in CC2 ) to the reassigned target frequency (CC3) and then carry out delta signaling of the measurement task configuration in the RRC reassignment command. At this time, the UE measurement task configuration and the base station measurement task configuration are completely coherent.
In the above step, if the source base station determines the replacement of CC2 by a CC4 and synchronously informs the UE that the CI of the CC4 is 1 via the RRC reassignment command, it deletes the measurement task related to the Scell from the original Scell (no CC2) and sets the delta signaling of a measurement task configuration to the UE based on the current measurement task configuration. After receiving the reassignment command, the UE performs the operation related to replacing the CC2 with the CC4 and carries out the following processing for the measurement task: delete the measurement tasks related to the Scell from the original Scell (in CC2) and then carry out delta signaling of the measurement task configuration in the RRC reassignment command. At this time, the UE measurement task configuration and the base station measurement task configuration are completely coherent.
Then, the source base station finds that the signal quality of the Scell in CC3 gets worse and determines to erase the CC3, i.e. erase the Scell which has the CI of 1, inform the UE of the erasure via the RRC reassignment command, synchronously erases the measurement tasks (the RRC reassignment command can contain the MID of the task to be deleted or not) related to the original Scell (in CC3), and configure the delta signaling of a measurement task configuration to the UE based on the current measurement task configuration.
After receiving the reassignment command, the UE clears the CC3 and carries out the following processing for the measurement task: clears the measurement tasks related to the original Scell (in CC3) and then carries out delta signaling of the configuration of measurement task in the RRC reassignment command. At this time, the UE measurement task configuration and the base station measurement task configuration are completely coherent. Modality 6
As shown in Fig. 12, a UE resides in a CC1 and initiates the establishment of an RRC connection at CC1, accesses a carrier aggregation cell 1 after finishing the establishment of the RRC connection and then enters a connected state, the CC1 is a PCC, and a Pcell is a server cell in CC1. Due to the demand for services, a network side configures a CC2 for the UE to perform carrier aggregation, as such, the component carriers used synchronously by the UE are CC1 and CC2, where CC1 is the PCC, CC2 is an SCC and Scell is the serving cell in CC2. Carrier aggregation cell 1 belongs to base station 1 and is a base station of an LTE-A. The UE moves towards an LTE cell 2 that belongs to a base station 2 and is a base station of an LTE. The source base station determines to make a transition to the target base station and transitions from the UE to the LTE cell 2 using a CC3. As the target base station is an LTE system, the target base station supports only one carrier and handles the measurement task employing a processing principle used in the LTE system. As such, the source base station informs the UE to clear the SCC while sending a transition request message to the target base station, or informs the UE to clear the SCC via a transition command. Upon receiving the transition command, the UE automatically clears the SCC (if the clearing of the SCC is not explicitly informed in the transitional command, the UE can clear the SCC itself), and synchronously the UE automatically clears the measurement task related to the Scell in the SCC (CC2) or the source base station notifies the UE via an RRC signaling to delete the measurement task related to the Scell in the SCC (CC2), or the UE automatically deletes the measurement task for which the object measurement is the frequency point at which the SCC is (CC2) or the source base station notifies the UE via an RRC signaling to clear the measurement task for which the measurement object is the frequency point at which the SCC is (CC2) , thus, the UE uses only one carrier, that is, the CC1. At that time, the transition request message sent by the source base station to the target base station contains the measurement tasks of the UE at the source base station (at that time, the measurement tasks related to the SCC have been deleted, but the measurement task related to the Pcell for which the carrier frequency of the measurement object is the frequency point at which the SCC is maintained, or the measurement tasks for which the carrier frequencies of the measurement objects are all deleted), and it may further contain information about the bearer (e.g., S-CC1) currently used by the UE.
After the target base station receives the transition request message from the source base station, an S-Pcell (Pcell on the source side) and a T-Pcell (Pcell on the target side) are on different frequencies, and the frequency (CC3) on the which is the target Pcell is the measurement object, the following processing is performed for the measurement tasks related to the S-Pcell: for the measurement object corresponding to the measurement task which is the frequency (CC1) at which the S is -Pcell, modify the measurement object to the measurement object of the frequency where the T-Pcell is; and for the measurement object corresponding to the measurement task which is the frequency (CC3) where the T-Pcell is, modify the measurement object to the measurement object of the frequency where the S-Pcell is. The tasks of measuring the other carrier frequencies (except the primary carrier frequency and the secondary carrier frequency) are maintained.
The target base station configures delta signaling of a measurement task to the UE based on the result of measurement task processing above. The target base station sends the delta signaling to the source base station via a transition request response message, and upon receipt, the source base station sends it to the UE via a transition command.
After receiving the transition command by the UE, for a measurement object corresponding to a measurement task which is the frequency (CC1) at which the S-Pcell is, the measurement object is changed to a measurement object of the frequency at which is the T-Pcell, and for a measurement object corresponding to a measurement task which is the frequency (CC3) where the T-Pcell is, the measurement object is changed to a measurement object of the frequency which is the S-Pcell, and the tasks of measuring the other carrier frequencies (except the primary carrier frequency and the secondary carrier frequency) are maintained. Then, measurement task configuration in delta signaling is performed to acquire the final measurement task configuration. Modality 7
Fig. 13 is a schematic diagram showing a reconstruction of a UE from a cell 1 to a cell 2, in accordance with the present disclosure, as shown in Fig. 13,
UE resides in a CC1, initiates the establishment of an RRC connection at CC1, accesses a carrier 1 aggregation cell after completing the RRC connection establishment, and then enters a connected state, where CC1 is a PCC and a Pcell is a server cell on CC1. Due to the demand for services, a network side configures a CC2 for the UE to perform carrier aggregation, as such, the component carriers used synchronously by the current UE are CC1 and CC2, where CC1 is the PCC, CC2 is an SCC and Scell is the serving cell in CC2.
When the UE moves to a carrier aggregation cell 2, the source base station determines to make a transition to the target base station and performs the transition from the UE to the carrier aggregation cell 2, and the CC2, the CC3 and the CC4 are configured, where CC3 is the PCC. The transition request message sent by the source base station to the target base station contains the task of measuring the UE at the source base station, and may further contain information of the carriers currently in use by the UE, such as information about an S-CC1 and an S-CC2, where CC1 is information such as a PCC and the like.
After receiving the transition request message from the source base station, the target base station deletes the measurement tasks for which the frequencies carrying the measurement objects are the frequency point at which the source-side SCC is (i.e., the CC2), and erases the measurement task for which the carrying frequency of the measurement object is the frequency point at which the SCC of the target side (i.e., CC2 and CC4) is; for the measurement object corresponding to the measurement task which is the frequency (CC1) where the S-Pcell is, the measurement object is changed to a measurement object of the frequency where the T-Pcell is, and to the measurement object corresponding to the measurement task which is the frequency (CC3) which the T-Pcell is in, the measurement object is changed to the measurement object of the frequency which the S-Pcell is. The tasks of measuring the other carrier frequencies (except the primary carrier frequency and the secondary carrier frequency) are maintained.
The target base station configures delta signaling of a measurement task to the UE based on the result of measurement task processing above. The target base station sends it to the source base station via a transition request response message, and upon receipt, the source base station sends it to the UE via a transition command.
After receiving the transition command, the UE deletes the measurement task of which the frequency carrying the measurement object is the frequency point at which the source side SCC (i.e., the CC2) is, and deletes the measurement task for which the carrier frequency of the measurement object is the frequency point at which the target side SCC (i.e., CC2 and CC4) is located; for the measurement object corresponding to the measurement task which is the frequency (the CC1) in which the S-Pcell is, the measurement object is changed to a measurement object of the frequency in which the T-Pcell is; and for the measurement object corresponding to the measurement task which is the frequency (the CC3) where the T-Pcell is, the measurement object is changed to the measurement object of the frequency where the S-Pcell is. The CC4 measurement task is maintained, and then the measurement task configuration in delta signaling is performed to acquire the final measurement task configuration.
During the above process, as the source-side SCC (ie, CC2) and one of the target-side SCCs (ie, CC2 and CC4) are on the same carrier frequency (ie, CC2), the task measurement task for which the carrier frequency of the measurement object is the source-side SCC (ie CC2) is maintained and only the measurement task for which the measurement object carrier frequency is the target-side SCC ( that is, CC4) is cleared, and UE and network-side actions are consistent. The target base station configures delta signaling of a measurement task to the UE according to the result of measurement task processing above.
Fig. 14 is a structural diagram of a system for processing a measurement task in a carrier aggregation system according to embodiment 1 of the present disclosure, as shown in Fig. 14, the system for processing the measurement task in the a carrier aggregation system in accordance with the disclosure includes: a deletion unit 140, configured to delete all measurement tasks related to a source Scell; or delete a measurement task related to a Scell in a deleted source Scell.
Fig. 15 is a structural diagram of a system for processing a measurement task in a carrier aggregation system according to embodiment 2 of the present disclosure, based on the system shown in Fig. 14, the system provided in that embodiment including further a reallocation unit 141 and a modification unit 142, wherein the reallocation unit 141 is configured to reallocate a source Scell to another frequency where there is a measurement object, the deletion unit does not delete the measurement task related to the reassigned source Scell; and the modification unit 142 is configured to modify the measurement object corresponding to the measurement task related to the source Scell to a measurement object of the reassigned frequency.
The above process in which the source Scell is erased includes that: after configuration, there is no new Scell with the same frequency as the source Scell erased; or that there is no bearer identity corresponding to a source Scell serving cell. The process in which the source Scell is reassigned to another frequency on which the measurement object is includes that: the carrier identity of the source Scell remains unchanged and the frequency of the source Scell is changed.
The above modification unit 142 is further configured for: when a measurement object configured by the source base station for a UE contains the carrier frequency of a new Pcell and when the measurement object related to the measurement task is a frequency where there is a target Pcell, modify a corresponding measurement object to a frequency measurement object where the new Pcell is; and when the measurement object related to the measurement task is the frequency where the source Pcell is, modifying the measurement object to a measurement object of the frequency where the new Pcell is; otherwise, delete the measurement task corresponding to the frequency where the source Pcell is. Where source Pcell and target Pcell are at different frequencies.
Fig. 16 is a structural diagram of a system for processing a measurement task in a carrier aggregation system according to embodiment 3 of the present disclosure, based on the system shown in Fig. 14, the system for processing the task of measurement in the carrier aggregation system provided in this modality further includes: a standby unit 143, configured to maintain the measurement task when there is a measurement task for which the measurement object is a carrier frequency exclusive to the primary carrier frequency source and the secondary carrier frequency.
Fig. 17 is a structural diagram of a system for processing a measurement task in a carrier aggregation system according to embodiment 4 of the present disclosure, as shown in Fig. 17, the system for processing the measurement task in the The carrier aggregation system includes a scavenging unit 170, a backup unit 171 and a modifying unit 172, wherein the scavenging unit 170 is configured to delete a measurement task for which a measurement object is frequency at that there is a source-side Scell and/or a target-side Scell; the reserve unit 171 is configured to: for the same secondary carrier frequency as the frequency where there is the source side Scell and the target side Scell, maintain the measurement task of which the measurement object is the same secondary carrier frequency; and the modification unit 172 is configured to: when a frequency at which a Pcell is the measurement object, modify the measurement object of a measurement task to a measurement object of the frequency where the target Pcell for the task is. measurement of which the measurement object is the carrier frequency where the source-side Pcell is, and modify the measurement object to a measurement object of the frequency at which there is a source Pcell for the measurement task for which the measurement object is the carrier frequency at which the target Pcells are; where the source Pcell and the target Pcell are at different frequencies.
Fig. 18 is a structural diagram of a system for processing a measurement task in a carrier aggregation system according to embodiment 5 of the present disclosure, as shown in Fig. 18, the system for processing the measurement task in the Carrier aggregation system according to the disclosure includes: an erasure unit 180 configured to, when a Scell is erased, erase a measurement task related to the Scell, or erase a measurement task for which a measurement object is a carrier frequency where the Scell is.
It should be understood by those skilled in the art that the system for processing the measurement task in the carrier aggregation system in accordance with the disclosure is designed for the aforementioned method for processing the measurement task in the system aggregation system in accordance with the disclosure, and the function of each processing unit above can be understood by referring to the related descriptions given in the aforementioned embodiments 1-7. The function of each processing unit shown in the attached drawings can be implemented either by a program running on a processor or by a specific logic circuit.
All of the above-described embodiments are only preferred embodiments of the present disclosure, but do not have any limitation on the scope of the disclosure.

权利要求:
Claims (14)
[0001]
1. METHOD FOR PROCESSING A MEASUREMENT TASK IN A CARRIER AGGREGATION SYSTEM, characterized by comprising: the elimination, by a network element, of all measurement tasks related to a Secondary Cell, Scell, during a reassignment/transition process /rebuild, where all measurement tasks comprise: an A1 event, an A2 event, and an A3 co-frequency event; where the A3 co-frequency event is defined as follows: the frequency of a measurement object is the frequency at which there is a configured component carrier, a reference cell is a Scell, or Primary Cell, Pcell, at the frequency of a corresponding measurement object, and the signal quality of a neighboring cell is a designated deviation greater than that of the serving cell which has the same frequency point as the neighboring cell.
[0002]
2. METHOD, according to claim 1, characterized in that the network element comprises at least one User Equipment, UE, and a base station.
[0003]
3. METHOD, according to claim 1, characterized in that it further comprises: if the source Scell is reassigned to another frequency where there is a measurement object, modify the measurement object corresponding to the measurement task related to the source Scell to a reassigned frequency measurement object, instead of deleting the measurement task related to the source Scell; otherwise, delete the measurement task related to the source Scell.
[0004]
4. METHOD, according to claim 1, characterized in that the source Scell is erased in cases where there is no new Scell on the same frequency as the frequency where the source Scell is erased after configuration, or there is no carrier identity corresponding to the Scell font.
[0005]
5. METHOD, according to claim 1, characterized in that the source Scell is reassigned to another frequency in which there is a measurement object changing the frequency of the source Scell with a carrier identity of the source Scell unchanged.
[0006]
6. METHOD according to any one of claims 1 to 5, characterized in that it further comprises: when a measurement object configured by a source base station for a UE contains a carrier frequency of a new Primary Cell, Pcell, and the object of measurement related to the measurement task is frequency where there is a target Pcell, modify a corresponding measurement object to a frequency measurement object where there is a new Pcell; and if the measurement object related to the measurement task is the carrier frequency where the source Pcell is, modifying the measurement object to a frequency measurement object where the new Pcell is; otherwise, delete the measurement task corresponding to the frequency at which the source Pcell is; where the source Pcell and the target Pcell are at different frequencies.
[0007]
7. METHOD, according to claim 6, characterized in that it further comprises: perform no processing in the Pcell and Scell measurement tasks when the source Pcell becomes a Scell and the source Scell becomes a Pcell.
[0008]
8. METHOD according to claim 1, characterized in that it further comprises: maintaining the measurement task when there is a measurement task for which a measurement object is an exclusive carrier frequency of a source primary carrier frequency and a carrier frequency secondary.
[0009]
9. SYSTEM FOR PROCESSING A MEASUREMENT TASK IN A CARRIER AGGREGATION SYSTEM, characterized by comprising: an elimination unit (140) configured to erase all measurement tasks related to a Secondary Cell, Scell, source, during a process of reassignment/transition/rebuild, where all measurement tasks comprise: an A1 event, an A2 event, and an A3 co-frequency event; where the A3 co-frequency event is defined as follows: the frequency of a measurement object is the frequency at which there is a configured component carrier, a reference cell is a Scell, or Primary Cell, Pcell, at the frequency of a corresponding measurement object, and the signal quality of a neighboring cell is a designated deviation greater than that of the serving cell which has the same frequency point as the neighboring cell.
[0010]
The system of claim 9, characterized in that the system further comprises: a reallocation unit (141) and a modification unit (142), wherein the reallocation unit (141) is configured to reallocate the source Scell the other frequency where there is a measurement object; accordingly, the erasure unit (140) does not erase the measurement task related to the reassigned source Scell; and the modifying unit (142) is configured to modify the measurement object corresponding to the measurement task related to the source Scell to the reassigned frequency measurement object.
[0011]
11. SYSTEM according to claim 9, characterized in that it comprises means for performing a process in which the source Scell is erased, the process comprising: there is no new Scell at the same frequency as a frequency where there is a source Scell erased after configuration; or that there is no bearer identity corresponding to a secondary Scell source serving cell.
[0012]
12. SYSTEM according to claim 9, characterized in that the system further comprises: a reallocation unit (141), wherein the reallocation unit (141) is configured to reallocate the source Scell to another frequency where there is an object of measurement by changing the frequency of the source Scell with an unchanged source Scell carrier identity.
[0013]
13. SYSTEM according to claim 10, characterized in that the modification unit (142) is further configured to: modify, when a measurement object configured by a source base station for a UE contains a carrier frequency of a new Primary Cell, Pcell, and the measurement object related to the measurement task is a frequency where there is a target Pcell, a corresponding measurement object for a frequency measurement object where there is a new Pcell; and modifying the measurement object to the frequency measurement object where the new Pcell is when the measurement object related to the measurement task is the carrier frequency where there is a source Pcell; otherwise, delete the measurement task corresponding to the frequency at which the source Pcell is; where the source Pcell and the target Pcell are at different frequencies.
[0014]
14. SYSTEM according to claim 9, characterized in that it further comprises: a standby unit (143) configured to maintain the measurement task when there is a measurement task for which the measurement object is a frequency exclusive carrier of the frequency source primary carrier and a secondary carrier frequency.

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RU2537692C2|2015-01-10|

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EP2538715B1|2015-07-01|

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JP5878918B2|2016-03-08|

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KR20130004932A|2013-01-14|

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