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    • 专利摘要:
    COMMUNICATIONS DEVICE AND DATA COMMUNICATION METHODA communications device communicates data over a mobile radio network. The communications device includes a transmitter and receiver unit for communicating data to and / or a mobile radio network via a wireless access interface, and a module for storing information that identifies the communications device to the mobile radio network, where the information stored in the module includes the same common identifier as that provided to each of an associated group of communications devices, the common identifier being used to establish a communications session, which communications session can be used to communicate data to or any of the associated communications devices. The group of communication devices can be for communicating machine type (MTC) communications for a particular application such as for example, being arranged in a vehicle such as a car in order to report certain parameters. As such, because of the spatial proximity of each of the communications devices, each can receive signaling data from the control plane and therefore the communication of the signaling data is as if broadcasting to a local environment in which the group of devices communications is willing. As a result, there is an economy in bandwidth of communications that is proportional to the number of devices in the group.
    公开号:BR112013010001A2
    申请号:R112013010001-0
    申请日:2011-10-03
    公开日:2020-07-28
    发明作者:Robert Zakrzewski
    申请人:Sca Ipla Holdings Inc.；
    IPC主号:
    专利说明:

    . “COMMUNICATIONS DEVICE, AND, DATA COMMUNICATION METHOD” 'Field of the Invention The present invention relates to communications systems - which are arranged to communicate data with mobile communications devices via a wireless access interface.
    The present invention also relates to communications devices that communicate data with mobile radio networks, infrastructure equipment for mobile radio networks and methods for communicating data with mobile radio networks.
    Background to the Invention Mobile communication systems have evolved over the last ten years from the GSM System (Global System for - Mobile) to the 3G system and now include packet data communications as well as circuit switched communications.
    The third generation design society (3GPP) has now started to develop a mobile communication system called Long Term Evolution (LTE), in which a core network part has been evolved to form a more simplified architecture based on a fusion of components from previous mobile radio network architectures and a radio access interface that is based on Orthogonal Frequency Division Multiplexing (OFDM) on the downlink and Single Carrier Frequency Division Multiple Access (SC-FDMA) on the uplink.
    At the moment, mobile communications services are dominated by human-to-human (H2H) communications, that is, - data that is transmitted by one human to another human or at least data that is transmitted for presentation to a human being.
    It is now recognized that there is a desire to satisfy communications to and / or machines that are generally referred to as machine-type communications (MTC) or machine-to-machine communications (M2M).
    . TCM communications can be characterized as communicating data that was generated from a source automatically, for example in response to: some other stimulus or event informing some machine attribute or some monitored parameter or called intelligent measurement.
    Thus, S while human communications such as voice can be characterized as being communications requiring a few minutes' communications session with data being generated in several milliseconds with pauses in between or video can be characterized as streaming data at a substantially bit rate Constantly, MTC communications can be characterized as generally communicating sporadically small amounts of data although it would be appreciated that there is also a wide variety of possible MTC communications.
    As will be appreciated, it is generally desirable to provide mobile communications using a 15th radio communications bandwidth and core network resources as effectively as possible, with. which MTC communications, for example, can provide a significant challenge.
    Summary of the Invention In accordance with the present invention, a communication device for communicating data over a mobile radio network is provided, the communication device including a transmitter and receiver unit for communicating data to and / or a mobile radio network via a wireless access interface, and a module for storing information that identifies the communications device for the mobile radio network.
    The information stored in the module includes the same common identifier as that provided to each of an associated group of communications devices, the common identifier being used to establish communications sessions, which communications sessions can be used to communicate data to and from any communications devices
    Associated R. As such, the communications device may operate as a member of a group of associated communications devices, each of the group's associated communications devices including the same identifier with respect to which communications sessions can be established to communicate data over the network. mobile radio network of any of the associated communications devices.
    The inventor of the present invention has recognized that a plurality of communication devices can be associated with each other, which can be efficient for example when communicating MTC communications. For example, a plurality of associated communication devices can be spatially arranged over a vehicle, such as a car, in order to monitor parameters or events of interest such as engine performance, temperature, vehicle speed, direction guidance and actually the location of the vehicle. Each of these parameters can be served by a separate communications device that periodically reports on the parameters that are detected by an associated sensor. In another example, communication devices can be arranged along a public transport vehicle such as a train or bus and can report on things a number of passengers present in the vehicle, the amount of sales that have been made, the position of the vehicle and engine performance. Other examples can be devised when applying embodiments of the invention.
    Embodiments of the present invention provide each of the | communications devices in a group with the same identifier, for example reproducing the same Subscriber Identity Module (SIM) or for LTE, the same Universal SIM (U-SIM). As such, although communications devices can be identified individually, for example, in the physical layer or in the radio access layer of a mobile radio network, to a higher layer, for example the control layer of
    'media access (MAC) or application layer, communications devices can be addressed using a unique identifier to establish a communications session or address. In one example, the identifier is an International Mobile Equipment Identity - (IMED. As such, all control and signaling plan data that is communicated to the group's communication devices will be communicated as if the mobile radio network were communicating with a single device. Control plan or signaling data can be, for example, mobility management signaling within the evolved packet system. As such, because of the spatial proximity of each of the communications devices, each can receive the control plane signaling data and therefore the signaling data communication is as if broadcasting to a local environment in which the group of communications devices is arranged. Therefore, there is an economy in the bandwidth of communications which is proportional to the number of devices in the group.
    In order to establish a communications session or to switch communications devices between a connected state and an Evolved Packet System (EPS) Connection Management (ECM) state, a first of the group's communications devices is arranged in operation for establish the communications session by transmitting signaling information including an identifier that is common to the group of communications devices for the mobile radio network by one or more of the base stations. Each of the associated communication devices in the group is then - arranged to receive signaling information communicated from the mobile radio network on the downlink in response to the signaling information | transmitted by the first communications device on the uplink.
    Arranging for one of the communications devices to transmit signaling information to establish a
    - communications, each of the associated communications devices within the group can transmit data to the mobile radio network and / or receive data from the 'mobile radio network using a communications carrier established by the first communications device using the identifier that is common to S - all associated communication devices in the group.
    Thus, one of | group communications devices acts as a “master” to perform all Stratum No Access (NAS) communications to the network, while all of the group's associated communications devices are arranged to receive signaling information as per NAS data from the network. mobile radio.
    Thus, the associated group of devices is configured such that one of these devices acts as a master to transmit uplink signaling data to the network and while the home subscriber server (HSS) can store data that identifies each of the communications devices using the Mobile Equipment Identifier | International (IMEIJ), the Media Access Layer (MAC) will respond as if the communication regarding signaling and control plan information came from a single communications device.
    Therefore, an efficiency in the communication of data from control and signaling plan can be realized.
    In one example, in relation to authentication and registration of the group of associated communications devices, transmission of information is done by the master device only.
    In some embodiments, the mobile radio network is arranged to communicate data to and from communications devices using a wireless access interface that includes a random access communication channel for signaling data uplink transmission, and each of the communications devices of the associated communications device group a predefined time is allocated between the device group to access the random access communication channel.
    Per
    . Therefore, since the communications devices are associated with each other, they can be arranged to access the 'random access communication' channel on a split time basis for the purpose that containment to access the random access communications channel. can be reduced at least. | In some examples, the device group is subdivided into subgroups, each subgroup being allocated to one of the predefined times. In this example, the time distribution for accessing random access can be made as short as possible, while still reducing the amount of contention when accessing the random access channel. Therefore, while in some instances, each of the group's communications devices could be allocated time to access the radio access channel, this could result in the devices having to wait a long time to transmit a request for uplink resources. Therefore, by subdividing the device group and allocating each of the subgroups the same time to access the random access channel, a balance can be struck between the probability of some containment access and the time that the communications devices have to wait before access the random access channel.
    In other embodiments, each of the communications devices within the group of associated communications devices is |
    It is provided with one of a set of data strings for use in identifying the communications device when transmitting data saved to the mobile radio network via the wireless access interface. Each of the data streams can be used, for example, as a preamble, medium or suffix in a transmission to identify a source of the transmission when resolving contention access. The group of data strings is associated exclusively with the group of communications devices. Alternatively, the data stream can be a spreading code.
    . The mobile radio network can be arranged to determine which of the communications devices of the associated group transmitted a data salvo and in response to grant access to uplink resources by transmitting an indication of the provision of uplink resources on a communications channel. downlink.
    To identify the device that is being allocated uplink resources, the data stream that has been allocated to that communications device is included in the signaling data granting the uplink resources, which are transmitted on the downlink for example as a preamble, middle or suffix or a scatter code.
    Thus, embodiments of the present invention provide an arrangement in which the group of associated communications devices is allocated a predefined sequence that could for example be used as a preamble to transmit data saves through the physical layer, for example the random access communications channel.
    The mobile radio network can then identify which of the communication devices transmitted the data on the random access channel.
    Therefore, when granting uplink resources, the mobile radio network communicates a grant message that includes the same preamble that it received in the request for uplink resources.
    All communications devices are arranged to listen to the control plan message by allocating the uplink resources and using knowledge of the predefined data sequence allocated to the communications device, which requested uplink resources, | can identify itself as being granted these resources.
    Therefore, | for example, contention can be resolved between devices | mobile communications that are allocated to the same subgroup and that can transmit on the same random access channel. ! According to some embodiments, the master communications device is arranged to communicate all communications from
    . NAS for the group. However, if one of the slave communication devices in the group is communicating with the mobile radio network, when the network 'considers that a transfer of passage to another base station should be made (transfer of passage directed by a network) or the device itself - of communications considers that a transfer of passage should be made (transfer of passenger directed by mobile), then this slave device communicates the signaling data of the associated AS to execute the transfer of passage for the group. The other devices within the group listen for downlink and uplink AS communications so that they can receive any message required to attach to the targeted base station. If the group's communications devices return to an idle mode, then the master device communicates all of the NAS signaling that is required for mobility.
    Additional aspects and features of the present invention are defined in the appended claims and include a | communications to form an associated group of communications devices and a data communication method.
    Brief Description of the Drawings Example embodiments of the present invention will be - described now with reference to the accompanying drawings, in which the same parts have the same designated references, and in which: Figure 1 is a schematic block diagram of a mobile radio network and a plurality of user equipment that form a communication system that operates according to the 3GPP Evolution standard - Long Term (LTE); Figure 2 is a schematic representation of a group of devices that are communicating with the wireless access network shown in Figure 1; Figure 3 is a schematic representation of a car that
    . includes a plurality of communications devices that are reporting data generated by sensors arranged along the car; Figure 4 is a schematic block diagram of a bus that includes a plurality of communication devices arranged on the bus - which is reporting information generated by sensors associated with each of the communication devices;
    Figure 5 is a schematic block diagram of three communications devices that form an associated group;
    Figure 6 is a schematic representation of the process by which a virtual multiplexing is performed on the uplink between the group of communications devices;
    Figure 7 is a flow chart illustrating a process performed by a first or master communications device in a group and the other devices in the group connecting to the mobile radio network; | Figure 8 is a schematic representation of a physical layer channel including a physical random access channel;
    Figure 9 is a schematic diagram illustrating the logical arrangement of the physical random access channel shown in Figure 7 with respect to subgroups of the communication devices;
    Figure 10 is a representation of a data salvo transmitted by the communication devices shown in Figure 8;
    Figure 11 is a diagram illustrating a message exchange between one of a group's mobile communications devices with a base station in order to gain access to connecting communications resources
    - ascending;
    Figure 12 is a flow chart illustrating the operation of a master communications device when accessing the random access channel to request uplink resources;
    Figure 13 is a diagram illustrating a message exchange
    : between a first or master communications device in a group for contentionless access to uplink communications resources; e] Figure 14 is a flowchart illustrating the operation of a master communications device when accessing the random access channel - to stop uplink resources. Description of Example Embodiments Embodiments of the present invention will now be described with reference to an implementation that uses a mobile radio network operating in accordance with the 3GPP Long Term Evolution (LTE) standard. Figure 1 provides an example architecture for an LTE network. As shown in Figure 1 and as with a conventional mobile radio network, mobile communications devices designated as user equipment (UE) | are arranged to communicate data to and from base stations 2 which are referred to in LTE as Enhanced NodeBs (eNodeB). As shown in Figure 1, each of the mobile communications devices 1 includes a Universal Subscriber Identity Module (USIM) that includes information and parameters that allow mobile communications devices to access the mobile radio network and be authenticated for services to which users have subscribed.
    The base stations or eNodeBs 2 are connected to an S-GW 6 service portal that is arranged to perform routing and administration of mobile communications services to communications devices 1 when they roam along the mobile radio network. In order to maintain mobility management and connectivity, a mobility management entity (MME) 8 manages enhanced packet service (EPS) connections with communications devices | using subscriber information stored on a home subscriber server (HSS) 10. Other core network components include the load and feature policy (PCRF) function 12, a packet data portal (P-GW)
    : 14 that connects to an Internet network 16 and finally to an external server
    20. More information can be gleaned for the LTE architecture from the book 'entitled “LTE for UMTS OFDN and SC-FDMA based radio access”, Holma H. and Toskala A., page 25 ff. - Communications with a Group of UEs Embodiments of the present invention provide an arrangement in which a plurality of communication devices can be associated with each other and grouped to communicate data from different sources. It is idealized that these data sources can include data generated by shape machines - that data can be generated automatically by sensor readings or events that require registration or other data that are generated by machines rather than by human interaction. Embodiments of the present invention therefore find application with TCM communications. An example of the device group is illustrated in Figure 2, where mobile communications devices | are associated with a group 22 and each is able to communicate with the wireless access network shown in 24.
    Examples where it might be appropriate to group devices as shown in Figure 2 are provided in Figures 3 and 4. Figure 3 provides an example of a car that includes a plurality of sensors A1, A2, A3, A4 - that are receiving stimulation from other components within of the car such as inside the engine, monitoring car speed or tire pressure, etc. Any data generated by the sensors A1, A2, A3, A4 is fed to the mobile communication devices 32, which can be spatially arranged along the carriage 30.
    Another example is shown in Figure 4, which can be a bus, for example a bus providing public transport. The bus can also include a plurality of sensors B1, B2, B3, B4 and for example it can also include a GPS 45 device, which automatically generates information to represent the location of the bus 40. As for the example shown in Figure 3, each one of the sensors B1, B2, B3, B4, 45 shown in Figure 4 has an associated communications device 46 to 'transmit the data generated by these sensors B1, B2, B3, B4, 45 to an application program running on a server that is connected to the Internet.
    - The data is communicated to that application program over a mobile radio network. | For the examples shown in Figures 3 and Figure 4, since the plurality of communication devices are generally located, embodiments of the present invention aim to use that common location to reduce the amount of signaling cost that is required to establish a communications session and communicate data from these communications devices over the mobile radio network. Embodiments of the present invention have therefore been devised to achieve such use and improved efficiency.
    Figure 5 provides a schematic illustration of three communication devices that are adapted to form an associated group of devices that can be used for example for the example applications illustrated in Figures 3 and 4. Each of the three devices 50 shown in Figure 5 includes a transmitter and receiver that are arranged to communicate data to and from a base station of the mobile radio network 52. Each of the communications devices includes a U-SIM module 54 and an application processor 56, which is arranged to run an application program to communicate data to a corresponding application server connected to the mobile radio network.
    As will be appreciated in some embodiments, the application processor 56 may be a very simple device or may not be included in the communications devices 50, because the function provided by the communications device 50 is only required to communicate data generated by the sensors through an input receiver 58.
    According to embodiments of the present invention, U-SIM 54 for each of the communications devices 50 contains the same 'identifier that identifies the communications devices to the network for the purpose of establishing a communications carrier. Thus, U-SIM can —include international mobile subscriber identity number (IMSI) or GUTI which is common for the communications device group. Thus, as shown in the table below, the group of communications devices 50 shown in Figure 5 can be addressed using various identifiers depending on whether it is an Access Stratum communication or a No Access Stratum (NAS / AS) communication. For AS communication, the temporary cellular radio network identifier (CRNTI) can be used to establish a communications session for all members of the group. Also shown below is a table providing an indication of the various ways in which the group or grouping of mobile devices can be addressed including how a higher layer identification can be made using a unique URL / URI or IP address for the group or grouping.
    m IMEI per loved device Highest RL / URI, etc., per device m IP address per group / grouping Cluster Identifiers The communication devices 50 shown in Figure 5 may also include an uplink receiver 60, which is arranged for detect and recover data transmitted by other communications devices of the group on the reverse link to the mobile radio network using transceivers 52.
    As will be appreciated from the following explanation in other embodiments, the uplink receiver 60 can be omitted. As will be explained in the following paragraphs, in order to realize an efficiency gain by reducing the control plan signaling, one of the devices in the group acts as a master device and performs the - transmission of signaling and information on the uplink to the network. mobile radio to establish a communications session and maintain a communication session in accordance with an enhanced packet system mobility function and ECM / EMM connection management), while the other devices in the group only listen to downlink communications. Thus, part of the improvement in utilization and efficiency of reducing communications and control plan information is that only one of the devices in the group is transmitting control plan information on the uplink.
    Figure 6 provides a system-level organization of the devices in the group. As illustrated by box 70, as far as higher layer network functions are concerned, such as the radio access layer, all of the communications devices in the group can be considered as a single communications device. Each of the devices in the group acts as a passive or "slave" device and one of the - devices in the group acts as a master device. When none of the devices in the group are transmitting or receiving data, then the communication devices enter an inactive state of ECM 72. However, in relation to communicating either AS or NAS data, any of the n communication devices in the group can enter a connected state —ECEC 74,76,78, in which case one of the devices is transmitting on the uplink and the other communications devices are receiving. Thus, all of the group's communications devices can enter a connected ECM state, but only one of the devices can be granted uplink resources at a time. However, all of the devices in the group enter the connected state of ECM so that they can receive downlink transmissions as in effect point-to-multipoint communication.
    Generally, the master communications device transmits all uplink messages to establish a communications carrier, which is associated with NAS communications.
    Figure 6 provides a flowchart that illustrates a process by which the master communications device establishes a communication session for the group of associated communications devices shown in Figure 5. The flowchart is summarized as follows: S1: One of the communications devices of the group acts as a master or UE communications device and establishes a communications session communicating signaling information for example via the i random access channel in order to carry out the necessary communication with the | mobile radio network.
    For example, the master UE can execute a request for | PDP context activation, or PDN connection request to establish! communications bearer or a similar bearer ordering protocol.
    The master UE uses IMSI / GUTI or another identifier that is common to all members of the group.
    The master UE can for example be the first UE of the group that wants to communicate data over the mobile radio network, in which case - it acts as the master UE to establish the communications session.
    The other UEs can detect the control plan data using the uplink receiver 60. Alternatively, one of the group members of the group's communication devices can be pre-designated as the master UE and therefore programmed, in which case the uplink receiver 60 can be omitted to form a more simplified architecture.
    S2: The other communications devices in the group that are associated together listen for the downlink signaling information that is provided in response to the uplink transmissions from the master UE. Downlink signaling information will include data required for mobility management and all 'Stratum Without Access' (NAS) information. S4: Although not part of the process of establishing communications sessions, the master communications device continues to perform authentication and other NAS-type communications for the device group. Correspondingly, all devices in the group monitor downlink communications to receive the | necessary information as if the communications device itself had — uplink communication performed.
    S6: All other communications devices monitor and decode the control plan signaling to detect when the group is moved from an ECM IDLE state to an ECM CONNECTED state.
    In accordance with embodiments of the present invention, the following 15th adaptations are applied to a group of communications devices to function as a group so that improvements in NAS control / communications plan efficiency can be achieved: - The group / cluster is identified by a single C-RNTI and —GUTI / IMSI common to all communications devices in the group.
    - Communications from the mobile radio network to the group on the downlink appear as broadcast transmission without modulation and adaptive encoding.
    - For downlink communications for the group of - radiolocation devices is supported.
    For uplink communications, a communications device must reserve uplink resources for a broadcast broadcast.
    - Only the master communications device can be re-authenticated and other NAS procedures are performed.
    - Slave devices can implement a subset of procedures that are mandatory for the master group device.
    Identification of the Group's Associated Communication Devices In some embodiments, devices that form a group / grouping are indexed or identifiable separately from each other. As indicated above for the explanation of Figure 6, this can be done during the connection procedure when the explicit authentication procedure is invoked (asking for IMEI) or implicitly when this information is administered through subscription information (USIM data). In the previous case, a standard procedure is used and C-RNTI per device is allocated during the transition to the ECM CONNECTED state (reserved preambles are used in the random access (RA) procedure). After transitioning to ECM-IDLE, the following applies:
    1. Devices that form a group / grouping must be indexed. This can be done during connection when the explicit authentication procedure is invoked by the network (the network asks for IMEI that uniquely identifies the device in the cluster and the index can then be allocated) or implicitly when this information is administered through subscription information (the USIM data). In the previous case, the master device connects to the network. In the previous case, a standard connection procedure is used by all devices in the cluster and one of them becomes the master device. After the connection procedure is completed, all devices transition to the ECM-IDLE state, so the following applies.
    2. “After having all the devices in the group registered, the system can radiolocate the entire group (devices are in ECM IDLE / EMM REGISTERED).
    3. "A device in the group is marked as a master device (for example, the device that was first powered on or has special capabilities in the case when slave devices are simplified). This device responds to the radiolocation message and is also the anchor device for | NAS procedures ie reauthentication, the TAU procedure, etc.
    4. The device that wants to initiate the uplink transmission uses its unique preamble to invoke the AR procedure (message 1). Once its preamble is echoed in message 2 and possible containment is resolved in message 4, the temporary RNTI is promoted as the group C-RNTI.
    5. Other devices passively listen to AR procedure messages in order to obtain parameters such as the group C-RNTI. This is done by searching for the group NAS identity (in message 4) and optionally group preambles (in message 2). The timing advance parameter could also be used, however, it might not be accurate for scattered devices. The TA correction will be obtained later when the MTC device invokes the RA procedure).
    6. To save energy, the ECM IDLE MTC device is | allowed to invoke the AR procedure at time intervals | predefined according to a function eg f (device / index number, IMSI) = radio hyperframe / subframe / TTI number, etc. This is required to prevent slave devices from constant monitoring of the PDCCH to obtain C-RNTI. Conventional LTE devices can activate the AR procedure at any time, other devices in the cluster must detect this in order to obtain the C-RNTI group. This would be inefficient from an energy saving point of view to require all devices to monitor the PDCCH constantly. This principle i is similar to listening to the radiolocation occasions. Alternatively, predefined rules can be used to select the PRACH resources to be accessed by the group and this information will enable MTC devices to choose timing occasions when the PDCCH needs to be monitored).
    7. After the master device is activated by the radiolocation message, other slave devices passively decode - any transmission - of DL by constantly monitoring the PDCCH. |
    8. A pseudo-random function is defined: fand (hyperframe number, device / index number, preamble group) = preamble index. The function is used to ensure that all devices in the group use a different preamble when the contention-based AR procedure is invoked. Since the AR response message may be delayed, the function may not name the same preamble indices for X frames / TTIs. This is necessary to distinguish between two AR attempts from devices belonging to the same group / grouping (a contention resolution will not work for these devices as they have the same NAS identifier). Please note that devices can conflict in the group and this is addressed by the use of unique preambles. Any contention with UEFEs that do not belong to the group is resolved by means of NAS identifiers.
    9. Once the MTC device has been granted UL resources, message 3 is sent (see Annex 1). After any contention has been resolved (with devices that do not belong to the group / grouping), the grouping device begins transmitting UL data. '10. Other devices in the group / cluster do not attempt to initiate UL transmission until there is no allocation in the PDCCH for the group C-RNTI (an inactivity timer must also expire) or the transmitting and clustering device is moved to ECM IDLE. The former requires the L2 protocols to be kept in sync (eg, sequence numbers, etc.), the latter requires passive AS signal decoding to detect when the RRC connection release message is sent. This approach blocks other devices as long as the transmitting device has data to send. Alternatively, the transmitting device stops after, for example, Y TTIs / ms so that the transmitting device is moved to ECM IDLE allowing other devices to request UL resources (through RA access) and start transmitting. This is effectively implied (without signaling) intermediation of UL transmission between clustering devices.
    11. L2 synchronization can be achieved explicitly by monitoring or implicitly restarting L2 protocols to a preset state after there is no allocation on the PDCCH for a predefined time (ie, the inactivity timer expires).
    12. TCM devices can also be restricted as | how much data are they allowed to transmit once they are | take the transmitting device regardless of whether | L2 synchronization or transition to ECM-IDLE status is used to indicate to other devices that they are allowed to start!
    the UL transmission.
    13. Only the master device can be re-authenticated and perform other NAS procedures.
    14. Slave devices can implement a subset of procedures that are mandatory for the master group device.
    15. Devices that join the group later may need to initiate the connection procedure that will be operated by the MME differently for the first connection, that is, the IMEI is always requested from the MTC device, the device is authenticated and security functions are activated (new security credentials i are passed to the entire group). No new PDP context is established, only existing PDP context information is passed.
    16. The concept of virtual UL multiplexing using a random access procedure (preamble and NAS containment resolutions) used to transfer data to terminals belonging to the group is illustrated in Figure 6.
    Uplink Communication by Group Communications Device As will be appreciated from the explanation provided above, only the master communications device is arranged to transmit signaling information to establish a communications session. However, any of the devices in the group can at some point transmit data on the uplink and therefore will require uplink capabilities.
    This is conventionally arranged by the mobile communications device transmitting a random access signal on a random access channel such as, for example, the LTE system's PRACH. The base station receiving the random access signal includes an arrangement to resolve contention between
    : two mobile communications devices transmitting a random access signal on the same uplink PRACH. However, according to the present technique, the communications device group is arranged to reduce a probability of contention by dividing the group's S - communications devices into device subgroups and pre-allocating a time when the subgroup's communications devices can access PRACH. As explained above, each of the devices in the group or at least the subgroup is provided with a unique data string to use as a preamble, medium or suffix, which can be used to solve - contention.
    As explained above in some embodiments, predefined sequences are allocated to the group of associated communication devices, which are unique to each of the communication devices in that group or at least within a subgroup, which are allocated the same 15th times to allocate the channel uplink random access. Therefore, in the event of contentious access to the | random access, the mobile radio network can respond by identifying if possible | which of the communications devices has successfully accessed the random access communication channel. This arrangement is illustrated in Figures 8, 9 and 10.
    Figure 8 provides an illustrative representation of the SC-FDMA uplink transmission scheme for the physical layer that includes a plurality of time slots that are divided from a 10 millisecond frame into 0.5 millisecond intervals. More detail is provided according to the LTE standard as explained in chapter 5 of - “LTE for UMTS OFDMA and SC-FDMA based radio access” by Holma H. and Toskala A. on page 83 ff. In addition, the frequency band is divided so that a matrix arrangement provides the UEs with a plurality of physical communications channels that are allocated by the mobile radio network to the UE on request. The request for an uplink resource allocation is provided by transmitting a signal on a physical random access channel (PRACH). A logical arrangement of access to the 'PRACH random access channel is shown in Figure 9.
    According to the present technique, in order to avoid contention - between the group's communication devices, each device is allocated a time when it can, if necessary, access the PRACH according to a function (fand) of the hyperframe number, the radio frame number, the device number or its index (the cell phone number being the same for all communications devices in the group) and the TTI, which was - explained above. Thus, each of the communication devices within the group is provided with a predefined time interval in order to access the PRACH. As shown in Figure 9, each of two communication devices, UE1, UE3 is allocated the same time 100 between a first subframe 102 when it can transmit, if necessary, a random access signal on a PRACH channel. A second device subgroup UE2, UFA is allocated a second time 104 in a subsequent frame 106 | when any device can transmit a random access signal. By subdividing the group's devices into subgroups, the likelihood of contention between the group's communications devices is reduced.
    In order to balance a probability of their containment in the PRACH and the time that each of the communications devices has to wait before they can request uplink resources, more than one communications device can be allocated to the same PRACH. That is to say, the device group is divided into subgroups and each of these groups is allocated the same PRACH, within a programmed PRACH access time share. Therefore, there is no limit on the size of the group with respect to a minimum time to access a PRACH or a PRACH capability. However, as a result, contention access will occur. Therefore, containment resolution is required. To this end,
    each of the group's communications devices is provided with a unique data stream which it uses as a preamble to transmit on the PRACH.
    Figure 10 illustrates a set of information that can be transmitted on the PRACH and includes a preamble field 90 and a Stratum - No Access (NAS) 92 identifier. Each communication device is provided with a unique data sequence from one of 64 possible data strings for use as a preamble.
    As illustrated in Figure 10, each of the devices in the group is provided with a unique preamble while other devices within the cell connected to the base station are provided with a different set of preamble sequences or another group of communications devices is provided with a set different from preamble sequences of the 64 preambles available.
    Since each of the devices within the group is provided with a unique preamble, when one of the communications devices transmits a salvo in the PRACH, then the mobile radio network can identify that the uplink features are required by the particular communications device.
    Therefore, when granting uplink resources, the mobile radio network and more particularly the base station / eNodeB perhaps in combination with the S-GW or the MME responds with the - single preamble of that communication device so that when listening to the uplink resource allocation, that communications device can identify which uplink communications resources have been allocated to this.
    A representation of contentious access for uplink communications resources for the group of communications devices is provided by the message flow shown in Figure 11, is reproduced from TS 36.300 and is presented here to help understand the embodiments of the present technique.
    The message exchange illustrated in Figure 11 provides four messages, which are explained as follows:
    1) RACH random access preamble on uplink: A communications device in the communications device group uses a preamble that was derived from the fand function. The preamble uniquely identifies the communications device within the group. Contention may still exist for access to the random access channel.
    If another communications device in the same subgroup also transmits at the same time on random channel access, then loss of path can be used to determine which group a preamble is selected from. The - group to which a preamble belongs provides an indication of message size 3 and the radio conditions to the UE. The preamble group information along with the necessary thresholds are broadcast in system information.
    2) Random Access Response generated by the Media Access Layer (MAC) on the shared downlink channel (DL-SCH): The communications device identifies that the uplink resource lease is for it using the preamble identifier of single random access.
    This communication is semi-synchronous with message 1, because it is within a flexible window of which the size is one or more transmission time intervals (TTI). There is no HARQ, the message is addressed to the RA-RNTI in the PDCCH. This message carries at least the random access preamble identifier, Alignment information - Timing, initial uplink granting and Temporary C-RNTI appointment, which may or may not be made permanent in the Containment Resolution. This is planned for a variable number of UEs in a DL-SCH message.
    3) First uplink transmission programmed in the
    . uplink shared channel: This message is sent by the communications device 'that recognized its unique preamble in message 2. The message has the following characteristics: e Stamping uses Hybrid Automatic Repeat Request (H-ARQ); * The size of the transport blocks depends on the uplink lease loaded in step 2 and is at least 80 bits.
    e This message carries the Radio Resource Connection (RRC) Connection Request generated by the RRC layer and transmitted by CCCH; e This message carries at least one NAS UE identifier, but no NAS messages; * RLCTM: no segmentation; e For RRC Connection Reestablishment procedure (only by the master communications device); and —Stamping carries the RRC Connection Reestablishment Request generated by the RRC layer and transmitted through the Common Control Channel (CCCH); * —RLCTM: no segmentation; * —The message does not contain any NAS messages.
    * —Stamping is communicated after transfer of passage, from the base station in the target cell, but only from the master communications device; e This message carries Confirm Passage Transfer of RRC encrypted and protected in integrity generated by the RRC layer and transmitted by DCCH; e This message loads the UE's C-RNTI by sending this as established when requesting uplink resources or following one |
    Passage Transfer Command; * —TIncluium Uplink Status Report when possible. and For other events, this message is sent by the communications device that recognized its random access preamble in message 2. 4) Downlink Containment Resolution: All communications devices in the group listen to message 4 including the communications device that recognized its random access preamble identifier communicated in message 2. This message is characterized by the following attributes: e Early containment resolution is used since eNodeB does not wait for a NAS response before resolving contention; e Estamensagem is not synchronized with message 3; | and Stamping uses Hybrid Automatic Repeat Request (H-ARQ);
    and Stamping is addressed to the Temporary C-RNTI in the PDCCH for initial access and after a radio link failure to the C-RNTI in PDCCH for UE in RRC CONNECTED;
    and H-ARQ feedback is transmitted only by the UE that detects its own UE preamble identifier, as provided in message 3, which is provided in response to the Containment Resolution message;
    e For initial access and Resetting procedure
    RRC connection, no segmentation is used (RLC-TM);
    and Temporary OCRNTI is promoted to C-RNTI for a UE that detects success of random access and no longer has a C-RNTI; is overthrown by others.
    A UE that detects success of random access and already has a C-RNTI, resumes using its C-RNTI.
    In summary, Figure 12 provides a flowchart indicating the operation of the communications device group when gaining access to the uplink resources. The steps illustrated in Figure 12 are summarized as follows: S20: The communication device waits in turn to transmit on the uplink PRACH according to the pre-arranged time division of the available PRACH time intervals the list of other communication devices. The communications device uses its unique random access preamble to transmit a request to have - uplink capabilities to the mobile radio network transmitting a salvo of signals using the preamble in PRACH. However, this can be contemporary with another communications device in the same subgroup or actually another communications device not within the group of associated communications devices. This is because the random access procedure is used by devices that belong to the subgroup as well as devices that do not belong to the group. There are two levels of contention, which are resolved both by anyone using the preambles allocated by the group device and final resolution by a NAS identifier. The devices in the subgroup use preambles that are unique within the - subgroup. The first containment resolution is used to discriminate between devices in the subgroup. If they are not in the subgroup, but belong to the device group, contention should not occur because each subgroup is allocated a different time slot in order to avoid contention in the first place. However in both cases, it is possible that - devices that do not belong to the device group will attempt uplink access and this is the case when the second contention is resolved with the help of NAS identifiers.
    822: If an eNodeB can resolve one of the PRACH random access transmission, eNodeB can respond by providing a response from the MAC or eNodeB downlink shared channel and uses the random access preamble identifier of the i communications device that it transmitted on PRACH.
    Thus, eNodeB can uniquely identify the communications device from within the subgroup to which it is granting uplink capabilities using the preamble named for that communications device.
    Obviously, if the random access transmission was through a communications device that is outside the group, then contention is resolved in the usual way as mentioned above.
    S24: Having received a response from eNodeB, the communications device schedules its uplink transmissions according to the uplink resources allocated as long as there was no contention for the uplink PRACH when it transmitted its salvo. 826: If there was contention when the communications device transmitted the random access transmission in step S20 on the PRACH, because another communications device in the subgroup or a device outside the device group transmitted a random access transmission on the PRACH and eNodeB cannot resolve the transmissions, then eNodeB will respond immediately to indicate that there was contention on the random access channel.
    Thus, the base station indicates that the transmission of the random access communication request in PRACH was unsuccessful.
    Consequently, the communications device identifies that its attempt to gain uplink resources was unsuccessful and therefore retransmits a random access salvo in PRACH when its scheduled return arrives again. - Access without Containment of Uplink Resources Used by UE Master A non-contention based random access procedure is only used by the transmitting communications device during pass-through or by the master device when positioning data is requested.
    As with the other communications devices in the group, the master communications device is provided with a preamble that is unique to that device.
    In addition, random access is not contentious because the master communications device or the communications device responsible for passing through is allocated time to access the PRACH that is not shared with other communications devices.
    Therefore, there is no contention access resolution required for the master communications devices, and so the request for uplink resources explained above is modified for the master communications device as explained below:
    The three steps of the non-contention based random access procedure are represented by the message flowchart in Figure 13, and summarized as follows:
    0) Nomination of Preamble of Random Access by dedicated signaling in DL:
    ENodeB assigns the UE a Preamble of Random Access without contention.
    This is a Preamble of Random Access that is not within the set of preambles that are sent to other UEs within the group for broadcast signaling use.
    This Preamble of Random Access without contention is signaled to the master UE using either:
    * A Pass Transfer command generated by targeted eNodeB and sent from the source eNodeB for pass transfer, which is operated by the master UE; or e Using the PDCCH in case of downlink or positioning data arrival, which is being operated again by the master UE in the group, although the other devices in the group also detect the message; |
    1) Preamble of RACH Random Access in connection | ascending, which is transmitted by the group's master communications device. This message is transmitted by the master UE using the Random Access Preamble without contention. 2) Random Access Response on the shared downlink channel (DL-SCH): This message is transmitted in a semi-synchronous manner to the message | within a flexible window whose size is two or more TTIs. The message has the following attributes: e This message does not use Hybrid Auto Retry Request (H-ARQ); e The message is addressed to RA-RNTI in PDCCH; and Stamping carries at least timing alignment information and initial uplink grant for pass-through, timing alignment information for downlink data arrival; the random access preamble identifier.
    e This message is planned for one or multiple UEs in one | shared downlink message (DL-SCH). ; As illustrated in Figure 14, the following steps are taken — to the master device to secure uplink features: S30: The master device receives a random access preamble for use when ordering uplink features from this service base station.
    832: The master communications device transmits a - request for uplink resources using the non-contentious random access preamble.
    S34: The service base station responds by providing uplink resources on the shared downlink channel.
    M — s »—s -» - »s» - »-» s »-» ..—— [. 2 5 S5S51Á5UDp [—2p — zeoos —— »- ssoecsppotoss RR —— 32 How it will be appreciated from the example embodiments described above, some or all of the embodiments can provide the following advantages]: - "A grouping of communication devices can be addressed by a C-RNTI / IMSI. A grouping of communication devices can receive data simultaneously by the downlink. Broadcast transmissions are applied to a cell for localized delivery to a grouping of communications devices.The unidiffusion radiolocation procedure is used to enable downlink reception on a grouping of devices.
    - In known systems, the UE selects a preamble identifier at random. According to embodiments, random access preambles are used to discriminate between communications devices in a cluster.
    - - Any device in the cluster can request uplink capabilities to send data despite having the same NAS identifier (also C-RNTT). This is enabled by defining an implicit intermediation function that prevents other devices from interfering by uncoordinated uplink transmission. E-UTRAN cannot distinguish which collation device is transmitting.
    - An energy-saving means is defined for other communications devices in the device cluster to limit monitoring of PDCCH in ECM IDLE. Operation of the Associated Communication Devices As can be understood from the explanation of the example embodiments presented above, the following advantages are provided: - - Authorization and loading can be established for a group / grouping of communication devices instead of for each individual device; - - Communications and NAS procedures by group / grouping are operated by a named master device providing a reduction in signaling communications; o Implementation of the group's communication devices apart from the master device can be simplified (light weight slave devices); - The group of communications devices can use a C-RNTI / IMSI; - - Uplink data communications from the device group will be aggregated by the group making communications for the most efficient session.
    In order to achieve these advantages, it will be necessary for all communications devices in the group to monitor and decode control plan signaling and consequently the communications devices may include an uplink receiver 60. For example, the communications devices in the group are arranged in one embodiment to detect when the group is moved to EMC IDLE (no need to keep Layer 2 in sync as L2 is reinstated on retransmission to ECM CONNECTED) and / or Layer 2 needs to be synchronized in order to be able to initiate the link transmission ascending by other clustering devices while in ECM CONNECTED. This requires monitoring of transmission to the group C-RNTI. In addition, - adaptive modulation and coding cannot be used for communications | downlink, all devices in the group / grouping must | have the same hardware capabilities including security functions, etc. In addition, in some embodiments, the following modifications are made to the mobile radio network infrastructure: |
    - - A programming function in eNodeB is modified in order to enable transmission “as broadcast” for selected C-RNTIs'; - - eNodeB must be pre-provided with information that a group of communication devices form a grouping. ENodeB marks the allocated C-RNTI as used for group communication with the grouping.
    - If the connection procedure is used through slave devices, the MME is provided with an identification that subsequent connections are activated by devices that form a group / grouping.
    - - If connection-oriented protocols for higher layers are used, some restrictions and limitations could apply in the scenario when an IP address is allocated to a cluster.
    Various modifications can be made to the embodiments described above without departing from the scope of the present invention as defined in the appended claims. In particular, although embodiments of the invention have been described with reference to an LTE mobile radio network, it will be appreciated that the present invention can be applied to other forms of network such as 3G, GSM, UMTS, CDMA2000, etc. The term communications device as used here can be replaced with user equipment (UE), mobile communications device, mobile terminal, etc. In addition, although the term base station has been used interchangeably with eNodeB, it should be understood that there is no difference in - functionality between these network entities and that in other architectures, the base station will combine with a radio network controller to perform some of the functions that were performed by the Base Station / eNodeB in the previous description and therefore corresponding changes could be made when applying the previous invention to GPRS, 3G or other architectures.
    权利要求:
    Claims (24)
    [1]
    1. Communication device for communicating data over a mobile radio network, characterized by the fact that it comprises: a transmitter and receiver unit for communicating data to and / or from a mobile radio network via a wireless access interface, and a module for store information that identifies the communications device to the mobile radio network, where the information stored in the module includes the same common identifier as that provided to each of an associated group of communications devices, the common identifier being used to establish a session communications, which communications session can be used to communicate data to or from any of the associated communications devices.
    [2]
    2. Communication system according to claim 1, characterized by the fact that the module is a subscriber identifier module or universal subscriber identity module, which includes the same common identifier for each module.
    [3]
    3. Communications device according to claim 2 or 3, characterized in that the identifier is a temporary network identifier or is used to generate a unique resource location or unique resource identifier.
    [4]
    4. Communications device according to claim 1, characterized in that the module includes an equipment identification number, the equipment identification number being used by a radio link layer of the mobile radio network to identify each one of the communications devices within the communications device group.
    [5]
    Communications device according to any of claims 1 to 4, characterized in that the communications device is arranged to be a master communications device and the transmitter and receiver unit is arranged in operation to establish a communication session for the group of communications devices transmitting signaling information including the common identifier for the mobile network, the other associated communication devices in the group being arranged to enter a listening mode in which signaling information communicated from the mobile radio network can be received in response to the signaling information transmitted by the communications device, with the effect that each of the associated communications devices can transmit data to the mobile radio network and - receive data from the mobile radio network using the communications session established by the communication device communications using the common identifier.
    [6]
    6. Communications device according to any of the claims | to 4, characterized by the fact that the communications device is arranged to be a slave communications device and the transmitter and receiver unit is arranged in operation to detect a transmission of signaling information including the common identifier for the mobile network of a device group master communications to establish a communication session for the group of communications devices, and enter a listening mode in which signaling information communicated from the mobile radio network can be received in response to the signaling information transmitted by the communication device. master communications, with the effect that the communications device can transmit data to the mobile radio network and receive data from the mobile radio network using the communications carrier established by the communications device group using the common identifier.
    [7]
    Communications device according to claim 5 or 6, characterized in that the signaling information received from the mobile radio network in response to the first communications device includes information required for administration and mobility connection.
    [8]
    8. Communications device according to any preceding claim, characterized by the fact that the mobile radio network provides a wireless access interface that includes a random access communication channel for uplink transmission of a salvo, the transmitter and receiver unit is arranged to transmit a random access salvo on the random access communication channel according to a predetermined arrangement.
    [9]
    Communications device according to claim 8, characterized in that the predetermined arrangement includes allocating a time to the communications device in relation to the other communications devices in the group, when the transmitter and receiver unit can transmit the salvo random access on the random access communication channel.
    [10]
    Communications device according to claim 8 or 9, characterized in that the communications device is provided with a single set of predefined data sequences for use in forming the random access salvo for transmission on the transmission channel. random access of the wireless access interface, in which the transmitting and receiving unit is arranged to receive a signaling message in response to the random access salvo, using the unique data stream that was used to form the random access salvo.
    [11]
    Communications device according to claim 10, characterized by the fact that the random signal salvo includes data representing a request for uplink resources and the transmission and reception device is arranged to receive, following the transmission of the random access salvo, a signaling message granting uplink capabilities to the communications device, which is identified using the same unique predefined sequence used to form the random access salvo transmitted by the communications device.
    [12]
    Communications device according to claim 10 or 11, characterized in that the transmission and reception unit is arranged to: detect a transmission of a random access salvo on the uplink random access channel by another of the devices group communications, in response to the detected transmission, enter a listening state to detect data transmitted to the other from the devices by a packet data communications channel of the radio access interface, and wait a predetermined time after not detecting data transmitted by the packet data communications channel before attempting to transmit the random access salvo on the uplink random access channel.
    [13]
    13. Data communication method using a communications device over a mobile radio network, characterized by the fact that it comprises: providing a module to store information that identifies the communications device to the mobile radio network, in which the information stored in the module includes the same common identifier as that provided to each of an associated group of communications devices, use the common identifier to establish a communications session to communicate data over the mobile radio network, which communications session can be used to communicate data to or from any of the associated communications devices, and communicate data to and / or from a mobile radio network over the mobile radio network using the established communications session.
    [14]
    14. Method according to claim 13, characterized in that the module is a subscriber identifier module or universal subscriber identity module, which includes the same common identifier for each module.
    [15]
    15. Method according to claim 13 or 14, 5 characterized by the fact that the identifier is a temporary network identifier or is used to generate a unique resource location or unique resource identifier.
    [16]
    16. Method according to claim 13, characterized in that the module includes an equipment identification number, and the method includes: using the equipment identification number to identify the communications device within the group of communications devices.
    [17]
    17. Method according to any of claims 13 to 16, characterized in that the communications device is arranged to be a master communications device, and the method includes: establishing the communications session for the group of communications devices transmitting signaling information including the common identifier for the mobile network, the other associated communication devices in the group being arranged to enter a listening mode in which signaling information communicated from the mobile radio network can be received in response to the signaling information transmitted by the communications device, and transmit data to the mobile radio network and receive data from the radio network using the communications session established by the communications device using the common identifier.
    [18]
    18. Method according to any of claims 13 to 17, characterized in that the communications device is arranged to be a slave communications device, and the method includes: detecting a transmission of signaling information including the common identifier for the mobile radio network of a group master communications device to establish a communication session for the group of communications devices, enter a listening mode in which signaling information communicated from the mobile radio network can be received in response to the information signaling transmitted by the master communications device, and transmitting data to the mobile radio network and receiving data from the mobile radio network using the communications session established by the communications device group using the common identifier.
    [19]
    19. Method according to claim 17 or 18, characterized in that the signaling information received from the mobile radio network in response to the master communications device includes information required for administration and mobility connection.
    [20]
    20. Method according to any of claims 13 to 19, characterized by the fact that the mobile radio network provides a wireless access interface that includes a random access communication channel for uplink transmission of a signal salvo, and the method includes: transmitting a random access salvo on the random access communication channel according to a predetermined arrangement.
    [21]
    21. Method according to claim 20, characterized in that the predetermined arrangement includes allocating a time to the communications device in relation to the other communications devices in the group, and the transmission includes transmitting the random access salvo on the communication channel random access.
    [22]
    22. The method of claim 20 or 21,
    characterized by the fact that it comprises: providing the communications device with a single set of predefined data streams, using the single data stream to form the random access salvo for transmission on the random access channel of the wireless access interface, and receiving a signaling message in response to the random access salvo, using the unique data string that was used to form the random access salvo.
    [23]
    23. The method of claim 22, characterized in that using the unique data stream to form the random access salvo for transmission includes forming the signal random access salvo with data representing a request for uplink resources, and the method includes: receiving, following the transmission of the random access salvo, a signaling message granting uplink capabilities to the communications device, which is identified using the same unique predefined sequence used to form the random access salvo transmitted by the device communications.
    [24]
    24. Method according to claim 22 or 23, characterized in that it comprises: detecting a transmission of a random access salvo in the uplink random access channel by another of the group's communication devices, in response to the detected transmission, enter a listening state to detect data transmitted to the other device by a packet data communications channel from the radio access interface, and wait a predetermined time after not detecting data transmitted by the packet data communications channel before attempting to transmit a random access salvo on the uplink random access channel.
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    法律状态:
    2020-08-04| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-08-04| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04W 8/26 , H04L 29/12 Ipc: H04W 4/08 (2009.01), H04W 4/70 (2018.01), H04W 8/2 |
    2021-11-03| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2021-11-09| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2022-03-03| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    GB1017979.4A|GB2484921B|2010-10-25|2010-10-25|Communications device and method|
    GB1017979.4|2010-10-25|
    PCT/GB2011/051869|WO2012056209A1|2010-10-25|2011-10-03|Communications device and method|
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