WO2023046157A1 - 由中继ue执行的处理方法及用户设备 - Google Patents

由中继ue执行的处理方法及用户设备 Download PDF

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Publication number
WO2023046157A1
WO2023046157A1 PCT/CN2022/121290 CN2022121290W WO2023046157A1 WO 2023046157 A1 WO2023046157 A1 WO 2023046157A1 CN 2022121290 W CN2022121290 W CN 2022121290W WO 2023046157 A1 WO2023046157 A1 WO 2023046157A1
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Prior art keywords
relay
remote
paging
relay service
service
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PCT/CN2022/121290
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English (en)
French (fr)
Inventor
张崇铭
刘仁茂
山田升平
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夏普株式会社
张崇铭
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Publication of WO2023046157A1 publication Critical patent/WO2023046157A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to the technical field of wireless communication, and more specifically, the present invention relates to a processing method performed by a relay UE and a corresponding base station and user equipment.
  • a remote UE can communicate with the base station through a relay UE (relay UE).
  • the remote UE in the idle state or inactive state may request the relay UE with which the PC5 connection is established to monitor the paging message from the base station, so as to ensure the reachability of the remote UE.
  • the relay UE no longer needs to provide the service for the remote UE.
  • the Relay UE can obtain the UE identity of the remote UE, discontinuous reception (DRX) parameters, etc. from the remote UE, and then receive the paging message on the paging control channel at the paging time corresponding to the remote UE, and detect whether it contains There is the UE identity of the remote UE. If it contains the UE identity of the remote UE, then the relay UE can forward the paging message to the remote UE.
  • DRX discontinuous reception
  • the Relay UE can also provide the obtained remote UE information to the base station.
  • the base station When a paging message arrives at the base station side, the base station is responsible for distributing the paging message of the remote UE to the relay UE, and then the relay UE forwards it to the remote UE.
  • the base station needs to know in a timely manner which remote UE's paging messages can be directly distributed to corresponding relay UEs, and which remote UE's paging messages need to be transmitted on the paging control channel. In order to ensure the transmission efficiency of the paging message, a corresponding solution needs to be provided.
  • the present invention provides a relay UE processing method and user equipment, so that the information of the remote UE provided by the relay UE with relay service can be reported to the base station in time.
  • a processing method performed by a relay UE the relay UE provides a paging relay service for at least one remote UE connected to the relay, the processing method includes: determining that the relay Whether the paging relay service between the UE and at least one remote UE provided by the relay UE with the paging relay service has changed; and if the relay UE and the paging relay service provided by the relay UE If the paging relay service between at least one remote UE of the relay service is changed, a report message is sent to the base station, and the report message includes the remote UE's remote information related to the change of the paging relay service terminal UE information, where the remote UE information at least includes UE identification information used for paging of the corresponding remote UE.
  • the paging relay service includes receiving a paging message from the base station for a remote UE that is relay-connected to the relay UE, and sending the paging message to the remote UE that is relay-connected to the relay
  • user equipment including: a processor; and a memory storing instructions, wherein the instructions execute the above-mentioned processing method when executed by the processor.
  • the information of the remote UE provided by the relay UE with the relay service can be reported to the base station in time, so that the base station can accurately determine which remote UE's paging messages can be directly distributed to the relay UE, for which remote UEs the paging message needs to be sent via the paging control channel.
  • FIG. 1 is a flowchart of a processing method performed by a relay UE according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a processing method performed by a relay UE according to another embodiment of the present invention.
  • FIG. 3 is a flowchart of a processing method performed by a relay UE according to another embodiment of the present invention.
  • Fig. 4 is a brief structural block diagram of the user equipment involved in the present invention.
  • I-RNTI Inactive Radio Network Temporary Identifier Inactive Radio Access Network Temporary Identifier
  • the NR mobile communication system and its subsequent evolution versions are taken as an example application environment, and a base station and UE equipment supporting NR are taken as examples to describe multiple embodiments of the present invention in detail.
  • the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as eLTE, a communication system, or an NB-Iot system, or an LTE-M system.
  • it can be applied to other base stations and UE equipment, such as base stations and UE equipment supporting eLTE/NB-Iot/LTE-M.
  • the state of the UE can be divided into RRC idle state (IDLE), RRC connected state and RRC inactive state (INACTIVE).
  • RRC inactive state although the UE has no connection on the air interface, the UE's access layer context (AS context) is reserved on the base station and the UE side, and the UE is assigned an I-RNTI, which is used by the UE to restore The identity of the RRC connection.
  • AS context access layer context
  • This intermediate state can be considered as a connection suspend state, or it can be considered as a connection inactive (Inactive) state.
  • a UE can have two UE identities according to its RRC status:
  • the upper layer of the UE When the UE is in the RRC IDLE state (idle state), the upper layer of the UE, mainly the non-access layer, will indicate UE ID 1 to the RRC layer of the UE.
  • the RRC layer can determine whether the UE is being paged (paging) by the network side through the identifier.
  • the core network will trigger a paging message identified by UE ID 1 .
  • the UE receives the paging message it confirms whether the received paging message contains the UE ID 1 indicated by the upper layer. If so, the UE indicates this UE identity to the upper layer.
  • the upper layer can trigger the UE to initiate a connection establishment procedure.
  • the S-TMSI is taken as an example, and the S-TMSI is used as the UE identity 1 indicated to the UE by the upper layer, but the UE identity 1 is not limited to the S-TMSI, and may be other identities.
  • UE ID 2 When the UE is in the RRC INACTIVE state (inactive state), the RRC layer of the UE stores the UE ID 2. The RRC layer can determine whether the UE is paged by the network side through the identifier. Usually, the access network will trigger a paging message identified by UE ID 2 . For example, when the UE receives the paging message, it confirms whether the received paging message contains the UE identity 2 saved by itself. If so, the UE will initiate an RRC connection recovery procedure.
  • I-RINT is taken as an example, and I-RNTI is used as the UE identity 2 stored in the RRC layer of the UE, but the UE identity 2 is not limited to the I-RNTI, and may be other identities.
  • the received paging message includes the UE identity 1 indicated by the upper layer, for example, S-TMIS.
  • the UE indicates the UE identity S-TMIS to the upper layer, and then enters the RRC idle state.
  • the relay UE Since the remote UE at the far end cannot be directly connected to the base station, the relay UE is required to provide relay services for it.
  • the relay service that the relay UE can provide is mainly the paging relay service.
  • Such paging relay service refers to that the Relay UE receives a paging message from the base station for a remote UE connected to its relay, and sends the paging message to the remote UE connected to its relay.
  • the Relay UE there are two ways for the Relay UE to receive the paging message from the base station with the remote UE as the paging object:
  • Method 1 The relay UE receives the paging message on the public paging control channel, and confirms whether it contains the paging identifier of the remote UE. If it receives the paging message containing the paging identifier of the remote UE, it can forward or Indicated to the remote UE.
  • the relay UE receives dedicated signaling from the base station, which is used to indicate or convey the arrival of the paging message of the remote UE, and at least the paging identifier of the remote UE is included in the signaling . After receiving the signaling, the relay UE can indicate to the remote UE that it is paged by the network/base station, or indicate that a paging message from the remote UE arrives.
  • the base station needs to know the relay UE that provides the paging relay service for the remote UE, so as to ensure that the base station sends the paging message of the remote UE to the correct relay UE.
  • the UE identity used by the base station/network side for paging the remote UE may be the above-mentioned UE identity 1 (such as S-TMIS) or the above-mentioned UE identity 2 (such as I-RNTI).
  • the relay between the Remote UE and the relay UE can usually be a PC5 connection, or a sidelink connection.
  • the Remote UE can initiate a request to the relay UE connected to the PC5, requesting the relay UE to monitor and receive paging messages for it, that is, to provide a paging relay service.
  • the Remote UE provides the relay UE with information related to its paging reception, such as the UE identity of the remote UE, DRX configuration parameters, cycle settings, etc., through the PC5RRC message, such as the RRCReconfigurationSidelink message.
  • the relay UE can calculate the paging occasion of the remote UE, and receive the paging message at the corresponding paging occasion, and then detect whether the received paging message contains the remote UE UE ID, that is, the paging message of the remote UE is obtained through the above method 1. If the UE ID of the remote UE exists, the relay UE can notify the remote UE through the PC5 connection.
  • the Relay UE can also provide the acquired relevant information for the remote UE to receive paging to the base station.
  • the base station is responsible for distributing the paging message of the remote UE to the corresponding relay UE, and then the relay UE forwards it to the remote UE, that is, the paging message of the remote UE is obtained through the second method above.
  • the near field communication method mentioned in this article mainly refers to a side link (sidelink) connection. It can also be a WIFI connection, or other connection methods.
  • the reference point (reference point) based on the sidelink connection between the UE and the UE is called PC5, so the connection between the remote UE and the relayUE can be called a PC5 connection.
  • PC5 connection can be identified by a pair of Layer-2IDs, usually including a Source Layer-2ID and a Destination Layer-2ID. Or it may be simply referred to as a PC5 connection, a sidelink connection, etc. aimed at or corresponding to a certain address.
  • the UE can determine that a radio link failure has occurred for a specific address (specific destination) side link connection:
  • a specific address corresponds to a PC5 connection, so it can be considered that the PC5 connection corresponding to this address has SL RLF.
  • FIG. 1 is a flowchart of a processing method performed by a relay UE according to an embodiment of the present invention.
  • the paging relay service includes receiving a paging message from the base station for a remote UE that is relay-connected to the relay UE, and sending the paging message to the remote UE that is relay-connected to the relay UE.
  • the change of the paging relay service may include adding a paging relay service and/or deleting a paging relay service between the relay UE and at least one remote UE that is provided with the paging relay service by the relay UE .
  • the change of the paging relay service may be a change of the relay connection between the remote UE and the relay UE, for example, when a paging relay service request is received, a new relay connection is added, and for example, when it is determined that there is no need for the relay connection When the relay connection is provided by the remote UE that has been relayed, the relay connection with the remote UE is disconnected.
  • the former belongs to adding a paging trunk connection, and the latter belongs to deleting a paging trunk connection. It should be noted that, in the present invention, when a remote UE has established a relay connection with a relay UE, but receives a new paging relay service request from the remote UE, it also belongs to Added paging relay service.
  • the paging relay service may be determined that the paging relay service has been changed to delete the paging relay service in any of the following situations: (1) the at least one remote end of the paging relay service provided by the relay UE The relay connection between the remote UE in the UE and the relay UE is released; (2) the remote UE in at least one remote UE that is provided with the paging relay service by the relay UE enters a connected state; (3 ) An indication of stopping the paging relay service is received from a remote UE among at least one remote UE that provides the paging relay service by the relay UE, and the stopping of the paging relay service is used to indicate to the relay UE that no longer Provide paging relay service for the remote UE.
  • a report message is sent to the base station.
  • the report message includes the remote UE information of the remote UE related to the change of the paging relay service.
  • the remote UE information at least includes UE identification information for paging of the corresponding remote UE.
  • the base station can determine which remote UEs can send the paging message to the relay directly through the dedicated channel with the relay UE based on the UE identification information of the remote UE in the report message UE, and determine which remote UEs the paging message is sent via the paging control channel. For example, after receiving the report message, the base station sends the paging message of the remote UE to the remote UE whose paging relay service is currently provided by the relay UE through the dedicated channel with the relay UE in the report message sent to the relay UE, and then forwarded to the remote UE by the relay UE.
  • the report message may not be sent to the base station. Because the base station itself can know that the corresponding remote UE has entered the connected state at this time, and then can send a paging message through the RRC connection with the remote UE, so there is no need to send a report message to the base station.
  • FIG. 2 is a flowchart of a processing method performed by a relay UE according to another embodiment of the present invention.
  • the report message includes the list information of the remote UEs currently being provided with the paging relay service by the relay UE, and the list information is stored in the relay UE.
  • the list information is modified according to the change of the paging relay service. For example, if the change of the paging relay service is to add a paging relay service, the remote UE information of the remote UE corresponding to the newly added paging relay service is added to the list information. If the change of the paging relay service is to delete the paging relay service, the remote UE information of the remote UE corresponding to the deleted paging relay service is deleted from the list information.
  • FIG. 3 is a flowchart of a processing method performed by a relay UE according to another embodiment of the present invention.
  • the change is a new paging relay service
  • the change is to delete the paging relay service
  • the relay UE may also be determined whether the relay UE has undergone cell handover.
  • the list information of the remote UEs that the relaying UE provides the relaying service stored at the relaying UE can be sent to the base station.
  • whether the relay UE undergoes cell handover and whether the paging relay service is changed may also be regarded as independent events, and when the relay UE undergoes cell handover and the paging relay service changes , sending a report message including the information of the relayed remote UE to the base station to which the handed over cell belongs.
  • the process described above with reference to FIGS. 1 to 3 may also send a report message including remote UE information of the relayed remote UE to the base station when it is determined that the relay UE is enabled to send a report message to the base station.
  • the process from S102, the process from S202, or the process from S302 may be started.
  • whether the relay UE is enabled to send the report message may be determined according to whether the relay UE is configured with common paging parameters. If the relay UE is configured with common paging parameters, it may be determined that the relay UE is enabled to send a report message to the base station.
  • Relay UE establishes and maintains the variable varPagingDeliveryList.
  • the specific maintenance operations are as follows:
  • Operation 1 When the relay UE receives a request from the remote UE to request the relay UE to monitor and receive paging messages for it, the relay UE adds an entry for the remote UE in the variable varPagingDeliveryList.
  • This record contains at least the UE identity of the remote UE.
  • the record may also include address information corresponding to the PC5 connection between the relay UE and the remote UE.
  • the UE ID contained in the record may be UE ID 1 or 2, or two UE IDs of the remote UE are saved at the same time.
  • Such requests may be explicit requests, or implicit.
  • the PC5RRC message sent by the remote UE to the relay UE carries indication information, which indicates that the relay UE is requested to monitor the paging message for it, and optionally, also carries relevant information for the remote UE to receive the paging message , such as the UE identity of the remote UE, DRX parameter settings, etc.
  • the remote UE carries relevant information for receiving the paging message of the remote UE in the PC5RRC message sent to the relay UE, thereby implicitly instructing the relay UE to monitor the paging message for it.
  • Operation 2 When the PC5 connection between the relay UE and the remote UE is released, if there is a record corresponding to the remote UE in the variable varPagingDeliveryList, then the relay UE can delete (delete) or remove (remove) it in the variable varPagingDeliveryList the record.
  • Case 1 The upper layer (upper layer) of the relay UE requests to release the PC5-RRC connection corresponding to a certain destination (address) (the PC5-RRC connection release for the specific destination is requested by upper layers).
  • the relay UE can delete (delete) or remove (remove) the record in the variable varPagingDeliveryList .
  • the relay UE detects that a radio link failure (radio link failure) occurs in the PC5 connection to a certain address. In this case, if the address corresponds to the remote UE, and there is a record corresponding to the remote UE in the variable varPagingDeliveryList, then the relay UE can delete (delete) or remove (remove) the record in the variable varPagingDeliveryList .
  • Operation 3 When the remote UE enters the connection state, if there is a record corresponding to the remote UE in the variable varPagingDeliveryList, then the relay UE can delete (delete) or remove (remove) the record in the variable varPagingDeliveryList.
  • the Relay UE can determine or learn that the remote UE has entered the connected state in the following situations:
  • the indication information indicates that the remote UE enters the connected state, and then determines that the remote UE enters the connected state;
  • the relay UE can determine that the remote UE enters the connected state, and the local identifier can be the UE identifier carried in the adaptive layer;
  • the relay UE can determine that the remote UE enters the connected state, for example, the RRC reconfiguration message received by the relay UE from the base station contains information for this Configuration information of the RLC transmission channel or logical channel of the remote UE, etc.
  • Operation 4 When the relay UE receives the request or indication sent by the remote UE, the request or indication indicates that the relay UE does not need to monitor or receive paging messages for the remote UE. Then based on the indication, if there is a record corresponding to the remote UE in the variable varPagingDeliveryList, then the relay UE can delete (delete) or remove (remove) the record in the variable varPagingDeliveryList.
  • the relay UE can consider that the variable varPagingDeliveryList has changed (change) or updated (update), and then initiate (initiate) a process for reporting UE information to the base station, such as Sidelink UE information for NR sidelink communication.
  • This report message can be the existing SidelinkUEInformationNR message, or other RRC messages.
  • the UE may include the information element sl-PagingDeliveryList, and set the value of this IE as the value of the variable varPagingDeliveryList. Or carry the variable varPagingDeliveryList in the report message.
  • the base station After receiving the report message, the base station can learn the latest information about the paging remote UE that needs to be monitored, so as to make correct operations.
  • the relay UE may consider that when the maintenance operation 3) occurs, there is no need to start the transmission of the report message.
  • the relay UE can initiate (initiate) a process for reporting UE information to the base station; and when maintenance operation 3 occurs, the relay UE does not need to initiate The reporting process.
  • the relay UE only when any one of maintenance operation 1, operation 2, and operation 4 occurs, the relay UE considers that the variable varPagingDeliveryList has changed (change) or updated (update), and then initiates (initiate) a method for reporting UE to the base station information; and when the maintenance operation 3 occurs, the relay UE does not need to start the reporting process, or does not consider that the variable varPagingDeliveryList has changed (change) or updated (update).
  • Embodiment 1 On the basis of Embodiment 1, when the UE is configured (configured) or enabled (enabled) when the function of reporting the relevant information of the remote UE for receiving paging messages, the UE performs the maintenance in Embodiment 1. Operation; if the UE is not configured or is disabled (disabled) to report the relevant information of the remote UE for receiving paging messages, then the UE does not perform the maintenance operation in Embodiment 1.
  • the function of "reporting the relevant information of the remote UE for receiving the paging message” is essentially the function of the relay UE providing the remote UE information to the base station.
  • the provided remote UEs are mainly those remote UEs that need to be monitored by the relay UE for paging messages, or remote UEs that have sent a request to the relay UE to monitor their paging messages; the provided remote UE information is at least used for Paging the UE ID of the remote UE.
  • it is referred to as the function of reporting remote UE paging in the following.
  • Such a configuration or enabling operation may be an explicit operation, for example, the base station sends an RRC message to the relay UE indicating that the relay UE reports the paging information of the remote UE.
  • Such a configuration or enabling operation can also be an implicit operation. For example, whether to enable the operation can be determined according to whether the relay UE is configured with one or more of the following parameters:
  • PSS paging search space
  • the relay UE when the relay UE is configured with a common search space, the relay UE does not need to report the paging information of the remote UE, or the relay UE is disabled to report the paging information of the remote UE;
  • the relay UE When the relay UE is not configured with a common search space, the relay UE needs to report the paging information of the remote UE, or the relay UE is enabled to report the remote UE paging function, and then needs to perform the maintenance operation in Embodiment 1 .
  • the relay UE When the relay UE can receive the paging control channel, the relay UE does not need to report the paging information of the remote UE, or the function of reporting the paging of the remote UE is disabled;
  • the relay UE When the relay UE cannot receive the paging control channel, the relay UE needs to report the paging information of the remote UE, or enable the function of reporting the paging of the remote UE.
  • the relay UE When the relay UE can think that the variable varPagingDeliveryList has changed (change) or updated (update), only when the UE is configured (configured) or enabled (enabled) reports the remote UE's information for receiving paging messages function, the relay UE initiates (initiate) the process for reporting UE information to the base station described in Embodiment 1, and performs the following operations.
  • the process for reporting the UE information to the base station will not be started.
  • the relay UE When the UE is configured (configured) or enabled (enabled) to report the remote UE's function for receiving paging message related information, only when the relay UE thinks that the variable varPagingDeliveryList has changed (change) or updated (update ), the relay UE initiates (initiate) the process for reporting UE information to the base station described in Embodiment 1, and performs the following operations.
  • the UE When the UE is not configured or disabled (disabled) to report the relevant information of the remote UE for receiving paging messages, even if the relay UE thinks that the variable varPagingDeliveryList has changed (change) or updated (update), it will not start using The process of reporting UE information to the base station
  • the relay UE can start the process of reporting UE information to the base station described in Embodiment 1, and start the transmission of the report message.
  • the information element sl-PagingDeliveryList is included in the message, and the value of the IE is set as the value of the variable varPagingDeliveryList. Or carry the variable varPagingDeliveryList in the report message.
  • the relay UE when the relay UE successfully completes the RRC connection re-establishment, the relay UE can also start the process of reporting UE information to the base station described in Embodiment 1, and start the transmission of the report message.
  • the relay UE side no longer maintains a variable, but when the remote UE that the relay UE needs to monitor changes, the relay UE starts the process of reporting UE information to the base station, and according to different situations, in Report messages set differently for IE.
  • the specific implementation is as follows:
  • the relay UE When the relay UE receives a request from the remote UE to request the relay UE to monitor and receive paging messages for it, it may specifically be when it receives relevant information for receiving paging messages from the remote UE, such as the UE ID of the remote UE, etc. , the relay UE includes the IE Paging_delivery_addition_list in the report message, and sets the value of this IE as the UE identifier of the received remote UE. If the relay UE receives UE identities sent by multiple remote UEs at the same time, it can set the IE Paging_delivery_addition_list in the form of a list. Then send the report message.
  • the relay UE When the PC5 connection between the relay UE and the remote UE is released, the relay UE includes the IE Paging_delivery_release-list in the report message, and sets the value of this IE as the UE identifier of the remote UE of the released remote UE.
  • the PC5 connection between the relay UE and the remote UE is released under the circumstances described in Embodiment 1.
  • the relay UE When the relay UE is handed over, or performs a reconfiguration operation (reconfiguration with sync) to synchronize to a new cell, preferably, the relay UE successfully completes the handover (upon successful handover) or synchronizes to the new cell (upon After successful reconfiguration with sync), or when the RRC connection re-establishment is successfully completed, the relay UE includes the IE Paging_delivery_addition_list in the report message, and sets the value of this IE to the remote UE that has a PC5 connection with the relay UE UE ID.
  • the Relay UE starts the process of reporting UE information to the base station.
  • the relay UE When the relay UE receives a request from the remote UE to request the relay UE to monitor and receive paging messages for it, it may specifically be when it receives relevant information for receiving paging messages from the remote UE, such as the UE ID of the remote UE, etc. ;
  • the relay UE When the relay UE is handed over, or performs a reconfiguration operation (reconfiguration with sync) to synchronize to a new cell, preferably, the relay UE successfully completes the handover (upon successful handover) or synchronizes to the new cell (upon After successful reconfiguration with sync), or when the RRC connection re-establishment is successfully completed.
  • a reconfiguration operation reconfiguration with sync
  • the relay UE transmits a report message.
  • This report message can be the existing SidelinkUEInformationNR message, or other RRC messages.
  • the information carries or includes information related to the paging of the remote UE that needs to be monitored by the relay UE, such as the UE identity of the remote UE.
  • a step of determining whether the remote UE corresponding to the new paging relay service is consistent with any remote UE in the existing list information UEs are the same. If the remote UE corresponding to the newly added paging relay service is the same as any remote UE in the existing list information, update the UE identification information of any remote UE in the list information to the new The UE identification information corresponding to the paging relay service is added. This example will be described with reference to Embodiment 7.
  • the relay UE may first receive the request from the remote UE, which carries the identifier 1 of the remote UE. Then the relay UE receives the remote UE's request again, which carries the identity 2 of the remote UE. In this case, the relay UE can first delete the record corresponding to the identity 1, and then add a new record containing the identity 2 Information. Or the relay UE modifies or updates the information corresponding to the identity 1 to the identity 2.
  • the Relay UE can use the same address to determine that the two identities are from the same remote UE.
  • a request from a remote UE is received on the PC5 link corresponding to a certain address, which carries the identifier 1 of the remote UE.
  • the relay UE receives a request from the remote UE on the PC5 link corresponding to the address, which carries the identifier 2 of the remote UE.
  • the relay UE can determine that the two identities or the two requests correspond to the corresponding remote UE, so that the record corresponding to the id 1 can be deleted first, and then a new record including the information of the id 2 can be added.
  • the relay UE modifies or updates the information corresponding to the identity 1 to the identity 2.
  • a request from a remote UE is received on the PC5 link corresponding to a certain address, which carries the ID 1 and ID 2 of the remote UE. Then the relay UE receives a request from the remote UE on the PC5 link corresponding to the address, which carries the identifier 1 of the remote UE. Then the relay UE can determine that these two identities or the two requests correspond to the same remote UE, then the relay UE can delete the record corresponding to both id 1 and id 2, and then add a new record containing only id 1 Information. Or the relay UE modifies or updates the record corresponding to both the identity 1 and the identity 2 to include only the identity 1.
  • the Relay UE can also use the same UE ID to determine that the two requests come from the same remote UE.
  • the relay UE receives the request from the remote UE, which carries the ID 1 and ID 2 of the remote UE. Then the relay UE receives the request from the remote UE, which carries the identifier 1 of the remote UE.
  • This ID 1 is the same as the ID 1 received before, then the relay UE can determine that the two requests correspond to the same remote UE, then the relay UE can delete the record corresponding to both ID 1 and ID 2, and then add a new one
  • the records of only contain the information of ID 1.
  • the relay UE modifies or updates the record corresponding to both the identity 1 and the identity 2 to include only the identity 1.
  • Fig. 4 is a brief structural block diagram of the user equipment involved in the present invention.
  • the user equipment 400 includes at least a processor 401 and a memory 402 .
  • the processor 401 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like.
  • the memory 402 may include, for example, a volatile memory (such as random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as flash memory), or other memory systems.
  • Memory 402 has program instructions stored thereon. When the instruction is executed by the processor 401, one or several steps in the processing method for relaying UE described above in FIGS. 1-3 of the present disclosure may be executed.
  • the user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and can be used for the base station, MME, or UE, and the like.
  • the various identifiers shown above are only exemplary rather than restrictive, and the present disclosure is not limited to specific information elements as examples of these identifiers. Numerous variations and modifications may be made by those skilled in the art in light of the teachings of the illustrated embodiments.
  • various components inside the base station and user equipment in the above embodiments can be implemented by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Devices, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), etc.
  • DSP digital signal processing
  • ASICs Application Specific Integrated Circuits
  • FPGAs Field Programmable Gate Arrays
  • CPLDs Programmable Logic Devices
  • the program running on the device according to the present invention may be a program that causes a computer to realize the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • a program for realizing the functions of the various embodiments of the present invention can be recorded on a computer-readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs.
  • the so-called “computer system” here may be a computer system embedded in the device, which may include an operating system or hardware (such as peripheral devices).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium in which a short-term dynamic storage program is stored, or any other recording medium readable by a computer.
  • circuits for example, single-chip or multi-chip integrated circuits.
  • Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSPs digital signal processors
  • ASICs application-specific integrated circuits
  • FPGAs field-programmable gate arrays
  • a general-purpose processor can be a microprocessor, or it can be any existing processor, controller, microcontroller, or state machine.
  • the above-mentioned circuits may be digital circuits or analog circuits. Where advances in semiconductor technology have resulted in new integrated circuit technologies that replace existing integrated circuits, one or more embodiments of the invention may also be implemented using these new integrated circuit technologies.
  • the present invention is not limited to the above-described embodiments. Although various examples of the embodiments have been described, the present invention is not limited thereto.
  • Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

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Abstract

本发明提供一种由中继UE执行的处理方法及用户设备。提供由中继UE执行的处理方法，所述中继UE为与其中继连接的至少一个远端UE提供寻呼中继服务，该处理方法包括：确定所述中继UE与由所述中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务是否发生了变更；以及如果所述中继UE与由所述中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务发生了变更，则向基站发送报告消息，所述报告消息包括与所述寻呼中继服务的变更相关的远端UE的远端UE信息，所述远端UE信息至少包括相应远端UE的用于寻呼的UE标识信息。寻呼中继服务包括从基站处接收针对与中继UE中继连接的远端UE的寻呼消息，并将寻呼消息发送给与所述中继UE中继连接的远端UE。

Description

由中继UE执行的处理方法及用户设备 技术领域
本发明涉及无线通信技术领域，更具体地，本发明涉及由中继UE执行的处理方法以及相应的基站和用户设备。
背景技术
一个远端UE(remote UE)可以通过一个中继UE(relay UE)和基站进行通讯连接。处于空闲态或者非激活态的远端UE可以请求与其建立了PC5连接的中继UE为其监听来自基站的寻呼消息，从而保证远端UE的可达性。当remote UE和relay UE之间的PC5连接被释放时，则relay UE不再需要为remote UE提供该服务。
Relay UE可以从remote UE处获取remote UE的UE标识、不连续接收(DRX)参数等，然后在对应于remote UE的寻呼时刻，在寻呼控制信道上接收寻呼消息，并检测其中是否包含有remote UE的UE标识。如果包含有remote UE的UE标识，那么relay UE可以向remote UE转发该寻呼消息。
Relay UE还可以将获取的remote UE的信息提供给基站。当基站侧有寻呼消息到达时，由基站负责将remote UE的寻呼消息分发给relay UE，然后再由relay UE转发给remote UE。在这种情况下，基站需要及时的知晓哪些remote UE的寻呼消息可以直接分发给对应的relay UE，而哪些remote UE的寻呼消息需要在寻呼控制信道上传输。为了保证寻呼消息的传递效率，需要提供相应的解决方案。
发明内容
为了解决上述问题，本发明提供一种中继UE的处理方法及用户设备，以使得能够及时向基站报告由中继UE提供中继服务的远端UE的信息。
根据本发明的一个方面，提供由中继UE执行的处理方法，所述中 继UE为与其中继连接的至少一个远端UE提供寻呼中继服务，该处理方法包括：确定所述中继UE与由所述中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务是否发生了变更；以及如果所述中继UE与由所述中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务发生了变更，则向基站发送报告消息，所述报告消息包括与所述寻呼中继服务的变更相关的远端UE的远端UE信息，所述远端UE信息至少包括相应远端UE的用于寻呼的UE标识信息。所述寻呼中继服务包括从基站处接收针对与所述中继UE中继连接的远端UE的寻呼消息，并将所述寻呼消息发送给与所述中继UE中继连接的远端UE。
根据本发明的另一方在，还提供用户设备，包括：处理器；以及存储器，存储有指令，其中，所述指令在由所述处理器运行时执行如上所述的处理方法。
根据本发明的方法，能够及时向基站报告由中继UE提供中继服务的远端UE的信息，使基站能够据此准确地判断出针对哪些远端UE的寻呼消息可以直接分发给中继UE，针对哪些远端UE的寻呼消息需要经由寻呼控制信道来发送。
附图说明
图1是根据本发明的一个实施方式的由中继UE执行的处理方法的流程图。
图2是根据本发明的另一实施方式的由中继UE执行的处理方法的流程图。
图3是根据本发明的另一实施方式的由中继UE执行的处理方法的流程图。
图4是本发明所涉及的用户设备的简要结构框图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细阐述。应当注意，本发明不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本发明没有直接关联的公知技术的详细描述，以防止对本发明的理解造成混淆。
在具体描述之前，先对本发明中提到的若干术语做如下说明。除非另有指出，本发明中涉及的术语都具有下文的含义
UE  User Equipment用户设备
NR  New Radio新一代无线技术
LTE  Long Term Evolution长期演进技术
eLTE  Enhaced Long Term Evolution增强的长期演进技术
RRC  Radio Resource Control无线资源控制(层)
MAC  Medium Access Control媒体接入控制(层)
MAC CE  MAC Control Element MAC控制元素
SDAP Service Data Adaptation Protocol业务数据自适应层协议
S-TMSI  Serving Temporary Mobile Subscriber Identity临时移动用户服务标识
I-RNTI  Inactive Radio Network Temporary Identifier非激活态无线接入网临时标识
DRX  Discontinuous Reception不连续接收
DTX  Discontinuous Transmission不连续发送
RLC  Radio Link Control无线链路层控制
PDCP  Packet Data Convergence Protocol分组数据汇聚协议
HARQ  Hybrid Automatic Repeat Request混合自动重传请求
SRB  Signalling Radio Bearer信令无线承载
IE  Information Element信息元素
CORESET  Control resource set控制资源集合
PCCH Paging Control Channel寻呼控制信道
下文以NR移动通信系统及其后续的演进版本作为示例应用环境，以支持NR的基站和UE设备为例，具体描述了根据本发明的多个实施方式。然而，需要指出的是，本发明不限于以下实施方式，而是可适用于更多其它的无线通信系统，例如eLTE，通信系统，或者是NB-Iot系统，又或者是LTE-M系统。而且可以适用于其他基站和UE设备，例如支持eLTE/NB-Iot/LTE-M的基站和UE设备。
在NR接入技术中，根据UE在空口的连接状态，UE的状态可以分为RRC空闲态(IDLE)、RRC连接态以及RRC非激活态(INACTIVE)。 在RRC非激活态下，UE虽然在空口上无连接，但是UE的接入层上下文(AS context)被保留在基站和UE侧，并且UE被分配了I-RNTI，该标识是UE用来恢复RRC连接的身份标识。这种中间态可以认为是一种连接暂停(suspend)的状态，又或者可以认为是连接非激活(Inactive)状态。
一个UE根据其RRC的状态不同，可以有两种UE标识：
UE标识1：当UE处于RRC IDLE态(空闲态)时，UE的上层，主要是非接入层，会将UE标识1指示给UE的RRC层。RRC层通过该标识可以判定该UE是否被网络侧寻呼(paging)。通常，核心网会触发以UE标识1为标识的寻呼消息。例如，UE在接收寻呼消息时，确认所收到的寻呼消息中是否有包含上层指示的UE标识1。如果有，那么UE将这个UE标识指示给上层。相应地，上层可以触发UE发起连接建立流程。本申请中以S-TMSI为例，将S-TMSI作为上层指示给UE的UE标识1，但是UE标识1不限于S-TMSI，还可能是其他的标识。
UE标识2：当UE处于RRC INACTIVE态(非激活态)时，UE的RRC层保存着UE标识2。RRC层通过该标识可以判定该UE是否被网络侧寻呼。通常，接入网会触发以UE标识2为标识的寻呼消息。例如，UE在接收寻呼消息时，确认所收到的寻呼消息中是否有包含自己保存的UE标识2。如果有，那么UE将发起RRC连接恢复流程。本申请中以I-RINT为例，将I-RNTI作为UE的RRC层保存的UE标识2，但是UE标识2不限于I-RNTI，还可能是其他的标识。
特殊地，如果UE在INACTIVE态时，接收到的寻呼消息中包含了上层指示的UE标识1，例如，S-TMIS。这种情况下，UE将这个UE标识S-TMIS指示给上层，然后进入RRC空闲态。
处于远端的remote UE因为无法与基站直接相连，需要relay UE为其提供中继服务。对于处在RRC IDLE态或者RRC INACTIVE态的remote UE，relay UE可以提供的中继服务主要是寻呼中继服务。这样的寻呼中继服务是指Relay UE从基站处接收针对与其中继相连的远端UE的寻呼消息，并将所述寻呼消息发送给与其中继连接的远端UE。
其中，Relay UE接收来自基站的、以远端UE为寻呼对象的寻呼消息的方式有两种：
方式一：relay UE在公共寻呼控制信道上接收寻呼消息，确认其中是否包含有远端UE的寻呼标识，如果接收到含有远端UE的寻呼标识的寻呼消息，那么可以转发或者指示给远端UE。
方式二：relay UE接收来自基站的专有信令(dedicated signaling)，该信令用于指示或传递远端UE的寻呼消息到达，在该信令中至少包含了远端UE的寻呼标识。在接收到该信令之后，relay UE可以向该远端UE指示其被网络/基站寻呼，或者是指示有远端UE的寻呼消息到达。
在方式二中，基站需要知晓为远端UE提供寻呼中继服务的中继UE，这样才能保证基站将远端UE的寻呼消息送到正确的relay UE。
基站/网络侧用于寻呼remote UE的UE标识可以是上述UE标识1(例如S-TMIS)或者是上述UE标识2(例如I-RNTI)。
Remote UE和relay UE之间的中继通常可以是PC5连接，或者称为侧链路sidelink连接。Remote UE可以向与其存在PC5连接的的relay UE发起请求，请求relay UE为其监听并接收寻呼消息，即提供寻呼中继服务。Remote UE通过PC5RRC消息，例如RRCReconfigurationSidelink消息，向relay UE提供与其寻呼接收相关的信息，例如remote UE的UE标识，DRX配置参数，周期设置等等。
基于这些信息，relay UE可以计算出remote UE的寻呼时机(paging occasion)，并在对应的寻呼时机上接收寻呼消息，然后检测被其接收到的寻呼消息中是否有包含remote UE的UE ID，即通过上述的方式一获得remote UE的寻呼消息。如果存在remote UE的UE ID，那么relay UE可以通过PC5连接通知remote UE。
此外，Relay UE还可以将获取的、用于remote UE的寻呼接收的相关信息提供给基站。当基站侧有寻呼消息到达时，由基站负责将remote UE的寻呼消息分发给对应的relay UE，然后再由relay UE转发给remote UE，即通过上述方式二获得remote UE的寻呼消息。
近场通信
Remote UE和relay UE通过近场通信的方式进行无线连接/中继连接，以实现数据或信令的传输。在本文中提到的近场通信方式主要是指侧链路(sidellink)连接。还可以是WIFI连接，或者其他连接方式。UE和 UE之间基于sidelink连接的参考点(reference point)被称为PC5，因此remote UE和relayUE之间的连接可以被称为PC5连接。这样的PC5连接可以由一对层2标识(a pair of Layer-2ID)来标识，通常包括源层2标识(Source Layer-2ID)和目的层2标识(Destination Layer-2ID)。或者可以简称为针对或者对应于某一地址的PC5连接、sidelink连接等。
侧链路无线链路失败(sidelink radio link failure，SL RLF)
在下述情况下，UE可以判定针对特定的地址(specific destination)侧链路连接发生了无线链路失败：
当接收到sidelink RLC实体指示针对于特定的地址达到了最大重传次数(upon indication from sidelink RLC entity that the maximum number of retransmissions for a specific destination has been reached)；
当针对于特定的地址的定时器T400运行超时(upon T400 expiry for a specific destination)；
当接收到MAC实体的指示，指示针对特定地址的检测的连续的HARQ DTX达到了最大次数(upon indication from MAC entity that the maximum number of consecutive HARQ DTX for a specific destination has been reached)
当针对于特定地址的、用于sidelink信令承载的PDCP实体指示发生了完整性保护校验失败(upon integrity check failure indication from sidelink PDCP entity concerning SL-SRB for a specific destination)。
在侧链路连接或者PC5连接中，一个特定的地址对应着一个PC5连接，因此可以认为对应于该地址的PC5连接发生了SL RLF。
以下参照图1～3对本发明的方法进行说明。
图1是根据本发明的一个实施方式的由中继UE执行的处理方法的流程图。
如图1所示，在S102中，确定中继UE与由中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务是否发生了变更。在本发明中，寻呼中继服务包括从基站处接收针对与所述中继UE中继连接的远端UE的寻呼消息，并将寻呼消息发送给与其中继连接的远端UE。
寻呼中继服务的变更可以包括在中继UE与由中继UE提供寻呼中继服务的至少一个远端UE之间发生的新增寻呼中继服务和/或删除寻呼中继服务。寻呼中继服务的变更可以是远端UE与中继UE之间的中继连接的变更，例如在接收到寻呼中继服务请求时新增中继连接，再例如在确定不需要再为已中继连接的远端UE提供中继服务的情况下，断开与该远端UE之间的中继连接。前者属于新增寻呼中继连接，后者属于删除寻呼中继连接。需要说明的是，在本发明中，在某个远端UE已与中继UE建立了中继连接，但又从该远端UE接收到了新的寻呼中继服务请求的情况下，也属于新增寻呼中继服务。
作为示例，可以在以下中的任一情况下，确定寻呼中继服务发生了删除寻呼中继服务的变更：(1)由中继UE提供寻呼中继服务的所述至少一个远端UE中的远端UE与中继UE之间的中继连接被释放；(2)由中继UE提供寻呼中继服务的至少一个远端UE中的远端UE进入了连接态；(3)从由中继UE提供寻呼中继服务的至少一个远端UE中的远端UE接收到了停止寻呼中继服务指示，停止寻呼中继服务用于向所述中继UE指示不再为该远端UE提供寻呼中继服务。
如果中继UE与由中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务发生了变更，则在S104，向基站发送报告消息。该报告消息包括与寻呼中继服务的变更相关的远端UE的远端UE信息。远端UE信息至少包括相应远端UE的用于寻呼的UE标识信息。
基站在接收到报告消息后，可以基于报告消息中的远端UE的UE标识信息来判断针对哪些远端UE的寻呼消息可以直接经由与中继UE之间的专有信道来发送给中继UE，以及判断针对哪些远端UE的寻呼消息经由寻呼控制信道发送。例如，基站接收到报告消息后，针对报告消息中表示当前由中继UE提供寻呼中继服务的远端UE，将该远端UE的寻呼消息通过与中继UE之间的专有信道发送给中继UE，然后由中继UE转发给该远端UE。
作为示例，寻呼中继服务是由上述情况(2)引起的删除寻呼中继服务时，可以不向基站发送报告消息。因为此时基站本身能够获知相应远端UE已进入了连接态，进而可以通过与该远端UE之间的RRC连接来 发送寻呼消息，因而不需要向基站发送报告消息。
图2是根据本发明的另一实施方式的由中继UE执行的处理方法的流程图。在该实施方式中，报告消息包括当前处于由中继UE提供寻呼中继服务的状态的远端UE的名单信息，名单信息被保存在中继UE中。
如图2所示，在S202中，确定中继UE与由中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务是否发生了变更。
如果发生了变更，则在S204中，根据寻呼中继服务的变更，修改名单信息。例如，如果寻呼中继服务的变更是新增寻呼中继服务，则将该新增寻呼中继服务所对应的远端UE的远端UE信息追加到所述名单信息中，如果寻呼中继服务的变更是删除寻呼中继服务，则从名单信息中删除删除寻呼中继服务所对应的远端UE的远端UE信息。
然后，在S206，将修改后的名单信息携带在报告消息中发送给基站。
图3是根据本发明的另一实施方式的由中继UE执行的处理方法的流程图。
如图3所示，在S302，确定中继UE与由中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务是否发生了变更。
如果发生了变更，则在S304，确定所发生的变更的种类，即确定是新增寻呼中继服务还是删除寻呼中继服务。
如果该变更是新增寻呼中继服务，则在S306，将该新增寻呼中继服务所对应的远端UE的远端UE信息记录为新增名单信息，新增名单信息包括在上次发送报告消息之后发生的新增寻呼中继服务所对应的远端UE的远端UE信息。
如果该变更是删除寻呼中继服务，则在S306，将该新增寻呼中继服务所对应的远端UE的远端UE信息记录为删除名单信息，删除名单信息包括在上次发送报告消息之后发生的删除寻呼中继服务所对应的远端UE的远端UE信息。
此外，虽然附图中没有示出，也可以确定中继UE是否发生了小区切换。在一个示例中，可以在中继UE发生了小区切换的情况下，认为由中继UE向至少一个远端UE提供的寻呼中继服务发生了变更。此时，可以将中继UE处保存的由其提供中继服务的远端UE的名单信息发送 给基站。在发生了小区切换的情况下，可能有新的远端UE加入中继连接或已中继连接的远端UE离开中继连接，因而可以视为发生了寻呼中继服务的变更。
在另一示例中，也可以将中继UE是否发生小区切换和是否发生寻呼中继服务的变更视为独立事件，并在中继UE发生了小区切换并且寻呼中继服务发生了变更时，向切换后的小区所属的基站发送包括被中继远端UE信息的报告消息。
上述参照图1～图3所描述的过程也可以在确定中继UE被使能了向基站发送报告消息的情况下，向基站发送包括被中继远端UE的远端UE信息的报告消息。例如，可以在确定中继UE被使能了向基站发送报告消息的情况下，开始执行从S102起的流程、从S202起的流程或从S302起的流程。在另一示例中，也可以确定发生了寻呼中继服务的变更的情况下，确定是否被中继UE被使能了向基站发送报告消息，如果中继UE被使能了向基站发送报告消息，则发送报告消息。在一个示例中，可以根据中继UE是否被配置了公共寻呼参数来确定其是否被使能了发送报告消息。如果中继UE被配置了公共寻呼参数，则可以确定为中继UE被使能了向基站发送报告消息。
以下将列举出具体的实施例来说明本发明的处理方法。
实施例1
Relay UE建立并维护变量varPagingDeliveryList。具体的维护操作如下：
操作一：当relay UE接收到来自remote UE的请求，请求relay UE为其监听并接收寻呼消息时，relay UE在变量varPagingDeliveryList中为该remote UE增加一个记录(entry)。该记录至少包含该remote UE的UE标识。可选的，在该记录中还可以包括该对应于relay UE与该remote UE的PC5连接的地址信息等。特别的，该记录中包含的UE标识可以是UE标识1或者2，或者同时保存了该remote UE的两个UE标识。
这样的请求可以是显示的请求，或者隐式的。例如在remote UE发送给relay UE的PC5RRC消息中携带指示信息，该信息指示了请求relay UE为其监听寻呼消息，以及可选的，还携带了用于remote UE的寻呼消息接收的相关信息，例如remote UE的UE标识，DRX参数设置等。或者是remote UE在发送给relay UE的PC5RRC消息中携带了用于remote UE的寻呼消息接收的相关信息，从而隐式地指示relay UE为其监听寻呼消息。
操作二：当relay UE与remote UE之间的PC5连接被释放时，如果在变量varPagingDeliveryList中存在对应于该remote UE的记录，那么relay UE可以在变量varPagingDeliveryList中删除(delete)或者移除(remove)该记录。
上述relay UE与remote UE之间的PC5连接被释放可以是在下述情况下
情况1：relay UE的上层(upper layer)请求释放对应于某一destination(地址)的PC5RRC连接(the PC5-RRC connection release for the specific destination is requested by upper layers)。在这种情况下，如果对应于该地址的是remote UE，并且在变量varPagingDeliveryList中存在对应于该remote UE的记录，那么relay UE可以在变量varPagingDeliveryList中删除(delete)或者移除(remove)该记录。
情况2：relay UE检测到针对某一地址的PC5连接发生了无线链路失败(radio link failure)。在这种情况下，如果对应于该地址的是remote UE，并且在变量varPagingDeliveryList中存在对应于该remote UE的记录，那么relay UE可以在变量varPagingDeliveryList中删除(delete)或者移除(remove)该记录。
操作三：当remote UE进入连接态时，如果在变量varPagingDeliveryList中存在对应于该remote UE的记录，那么relay UE可以在变量varPagingDeliveryList中删除(delete)或者移除(remove)该记录。
Relay UE可以在下述情况下判定或者获知remote UE进入连接态：
-基于接收到的、来自remote UE的指示信息，该指示信息指示remote UE进入连接态，进而判定remote UE进入连接态；
-当基站/网络为给remote UE分配了本地标识时，relay UE可以判定remote UE进入连接态，该本地标识可以是携带在自适应层的UE标识；
-当relay UE接收到用于配置该remote UE传输的RRC配置信息时，relay UE可以判定remote UE进入连接态，例如在relay UE接收到的、来自基站的RRC重配置消息中包含了用于该remote UE的RLC传输通道或者是逻辑信道的配置信息等。
操作四：当relay UE接收到remote UE发送的请求或者指示，该请求或指示指示了relay UE不需要为该remote UE监听或者接收寻呼消息的信息。那么基于该指示，如果在变量varPagingDeliveryList中存在对应于该remote UE的记录，那么relay UE可以在变量varPagingDeliveryList中删除(delete)或者移除(remove)该记录。
当发生了上述操作任意之一，relay UE可以认为变量varPagingDeliveryList发生了变更(change)或者更新(update)，进而启动(initiate)一个用于向基站报告UE信息的过程，例如Sidelink UE information for NR sidelink communication。
在这一过程中，UE启动报告消息的传输(initiate transmission of the reporting message)。这个报告消息可以是现有的SidelinkUEInformationNR消息，或者其它RRC消息。
在这个报告消息中，UE可以包含信息元素sl-PagingDeliveryList，并且将该IE的取值设置为变量varPagingDeliveryList的取值。或者是在该报告消息中携带变量varPagingDeliveryList。
基站在接收到该报告消息后，可以获知最新的、需要监听的寻呼的remote UE的信息，从而做出正确的操作。
实施例2
在实施例1的基础上，relay UE可以认为当维护操作3)发生时，不需要启动报告消息的传输。
或者是，在维护操作一、操作二、操作四中任意一个发生时，relay UE可以启动(initiate)一个用于向基站报告UE信息的过程；而在维护操作三发生时，relay UE不需要启动该报告过程。
或者说是，只有在维护操作一、操作二、操作四中任意一个发生时，relay UE认为变量varPagingDeliveryList发生了变更(change)或者更新(update)，进而启动(initiate)一个用于向基站报告UE信息的过程；而在维护操作三发生时，relay UE不需要启动该报告过程，或者是不认为变量varPagingDeliveryList发生了变更(change)或者更新(update)。
实施例3
在实施例1的基础上，当UE被配置(configured)了或者被使能(enabled)了报告remote UE的用于接收寻呼消息的相关信息的功能时，UE才执行实施例1中的维护操作；如果UE没有被配置或者被去使能(disabled)了报告remote UE的用于接收寻呼消息的相关信息，那么UE不执行实施例1中的维护操作。
这里，“报告remote UE的用于接收寻呼消息的相关信息”这一功能其实质是relay UE向基站提供remote UE信息的功能。其中，被提供的remote UE主要是那些需要由relay UE监听寻呼消息的remote UE，或者是向relay UE发送过请求监听其寻呼消息的remote UE；被提供的remote UE的信息至少是用于寻呼remote UE的UE标识。为简化起见，下文中简称为报告remote UE寻呼的功能。
这样的配置或者使能操作可以是一个显示的操作，例如，基站给relay UE发送RRC消息中指示了让relay UE报告remote UE寻呼的信息。
这样的配置或者使能操作还可以是一个隐式的操作，例如，可以根据relay UE是否被配置了下述参数之一或者多来判定是否使能该操作：
公共搜索空间(common search space，CSS)；
寻呼搜索空间(paging search space，PSS)；
公共CORESET等。
以公共搜索空间为例，当relay UE被配置了公共搜索空间时，relay UE不需要报告remote UE的寻呼信息，或者是relay UE被去使能了报告remote UE寻呼的功能；
当relay UE没有被配置了公共搜索空间时，relay UE则需要报告remote UE的寻呼信息，或者是relay UE被使能了报告remote UE寻呼的功能，进而需要执行实施例1中的维护操作。
又例如，还可以根据relay UE是否能接收寻呼控制信道来判断：
当relay UE能够接收寻呼控制信道，那么relay UE不需要报告remote UE的寻呼信息，或者是去使能了报告remote UE寻呼的功能；
当relay UE无法接收寻呼控制信道，那么relay UE需要报告remote UE的寻呼信息，或者是使能了报告remote UE寻呼的功能。
在实施例1的基础上，本实施例的又一实现方法可以是
当relay UE可以认为变量varPagingDeliveryList发生了变更(change)或者更新(update)，只有当UE被配置(configured)了或者被使能(enabled)了报告remote UE的用于接收寻呼消息的相关信息的功能时，relay UE才启动(initiate)实施例1中所述的用于向基站报告UE信息的过程，并执行接下来的操作。
如果UE没有被配置或者被去使能(disabled)了报告remote UE的用于接收寻呼消息的相关信息，那么即使变量varPagingDeliveryList发生了变更，也不启动用于向基站报告UE信息的过程。
或者是
当UE被配置(configured)了或者被使能(enabled)了报告remote UE的用于接收寻呼消息的相关信息的功能时，只有当relay UE认为变量varPagingDeliveryList发生了变更(change)或者更新(update)，relay UE才启动(initiate)实施例1中所述的用于向基站报告UE信息的过程，并执行接下来的操作。
当UE没有被配置或者被去使能(disabled)了报告remote UE的用于接收寻呼消息的相关信息，即使relay UE认为变量 varPagingDeliveryList发生了变更(change)或者更新(update)，也不启动用于向基站报告UE信息的过程
实施例4
在实施例1-3的基础上，如果relay UE发生了切换，或者是执行了同步到新小区的重配置操作(reconfiguration with sync)，优选的，relay UE在成功完成了切换(upon successful handover)或者是同步到新小区的操作(upon successful reconfiguration with sync)之后，那么relay UE可以启动实施例1中所述的向基站报告UE信息的过程，并启动报告消息的传输。在该消息中包含信息元素sl-PagingDeliveryList，并且将该IE的取值设置为变量varPagingDeliveryList的取值。或者是在该报告消息中携带变量varPagingDeliveryList。
此外，在relay UE成功完成了RRC连接重建立的情况下，relay UE也可以启动实施例1中所述的向基站报告UE信息的过程，并启动报告消息的传输。
实施例5
与实施例1-4不同，relay UE侧不再维护一个变量，而是当relay UE需要监听的remote UE的发生变化时，relay UE启动向基站报告UE信息的过程，并根据不同的情况，在报告消息设置不同的IE。具体实现方式如下：
当relay UE接收到来自remote UE的请求，请求relay UE为其监听并接收寻呼消息时，具体可以是接收到用于接收remote UE的寻呼消息的相关信息时，例如remote UE的UE标识等，relay UE在报告消息中包含IE Paging_delivery_addition_list，且设置该IE的取值为接收到的remote UE的UE标识。如果relay UE同时收到多个remote UE发送的UE标识，那么可以以列表的形式设置IE Paging_delivery_addition_list。然后发送报告消息。
当relay UE与remote UE之间的PC5连接被释放时，relay UE在报告消息中包含IE Paging_delivery_release-list，且设置该IE的取值为被释 放的remote UE的remote UE的UE标识。relay UE与remote UE之间的PC5连接被释放可以是在实施例1所述情况下释放。
当relay UE发生了切换，或者是执行了同步到新小区的重配置操作(reconfiguration with sync)，优选的，relay UE在成功完成了切换(upon successful handover)或者是同步到新小区的操作(upon successful reconfiguration with sync)之后，或者时是成功完成了RRC连接重建立的情况下，relay UE在报告消息中包含IE Paging_delivery_addition_list，并且设置该IE的取值为与该relay UE存在PC5连接的remote UE的UE标识。
实施例6
在下述任一情况下，Relay UE启动向基站报告UE信息的过程。
当relay UE接收到来自remote UE的请求，请求relay UE为其监听并接收寻呼消息时，具体可以是接收到用于接收remote UE的寻呼消息的相关信息时，例如remote UE的UE标识等；
当relay UE与remote UE之间的PC5连接被释放时。其中relay UE与remote UE之间的PC5连接被释放可以是在实施例1所述情况下释放；
当relay UE发生了切换，或者是执行了同步到新小区的重配置操作(reconfiguration with sync)，优选的，relay UE在成功完成了切换(upon successful handover)或者是同步到新小区的操作(upon successful reconfiguration with sync)之后，或者时是成功完成了RRC连接重建立的情况下。
在启动向基站报告UE信息的过程中，relay UE传输报告消息。这个报告消息可以是现有的SidelinkUEInformationNR消息，或者其它RRC消息。在该信息中携带或者包含了需要relay UE监听的、和remote UE的寻呼相关的信息，例如remote UE的UE标识。
如果寻呼中继服务的变更是新增寻呼中继服务，则可以进行一步确定新增寻呼中继服务所对应的远端UE是否与既有的所述名单信息中的任一远端UE相同。如果新增寻呼中继服务所对应的远端UE与既有的名单信息中的任一远端UE相同，则将该任一远端UE在所述名单信息 中的UE标识信息更新为新增寻呼中继服务所对应的UE标识信息。以一参照实施例7来对该示例进行说明。
实施例7
在前述实施例1-3中，relay UE可以首先接收到来自remote UE的请求，里面携带着remote UE的标识1。然后relay UE再次接收到该remote UE的请求，里面携带着remote UE的标识2.在这种情况下，relay UE可以先删除对应于标识1的记录，然后再增加一个新的记录，包含标识2的信息。或者是relay UE将对应于标识1的信息修改或者更新为标识2。
Relay UE可以通过相同的地址来确定两个标识来自同一个remote UE。
例如在对应于某个地址的PC5链路上接收到了来自remote UE的请求，里面携带着remote UE的标识1。接着relay UE在对应于该地址的PC5链路上又接收到了来自remote UE的请求，里面携带着remote UE的标识2。那么relay UE可以确定这两个标识或者这两次请求对应于对应个remote UE，从而可以先删除对应于标识1的记录，然后再增加一个新的记录，包含标识2的信息。或者是relay UE将对应于标识1的信息修改或者更新为标识2。
又或者在对应于某个地址的PC5链路上接收到了来自remote UE的请求，里面携带着remote UE的标识1以及标识2。接着relay UE在对应于该地址的PC5链路上又接收到了来自remote UE的请求，里面携带着remote UE的标识1。那么relay UE可以确定这两个标识或者这两次请求对应于同一个remote UE，那么relay UE可以删除对应于同时包含标识1以及标识2的记录，然后再增加一个新的记录，仅包含标识1的信息。或者是relay UE将对应于同时包含标识1以及标识2的记录修改或者更新为仅包含标识1。
Relay UE还可以通过相同的UE标识来确定两次请求自同一个remote UE。
例如，relay UE接收到了来自remote UE的请求，里面携带着remote UE的标识1以及标识2。接着relay UE又接收到了来自remote UE的请 求，里面携带着remote UE的标识1。这个标识1和之前收到的标识1相同，那么relay UE可以确定这两次请求对应于同一个remote UE，那么relay UE可以删除对应于同时包含标识1以及标识2的记录，然后再增加一个新的记录，仅包含标识1的信息。或者是relay UE将对应于同时包含标识1以及标识2的记录修改或者更新为仅包含标识1。
图4是本发明所涉及的用户设备的简要结构框图。
如图4所示，该用户设备400至少包括处理器401和存储器402。处理器401例如可以包括微处理器、微控制器、嵌入式处理器等。存储器402例如可以包括易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统等。存储器402上存储有程序指令。该指令在由处理器401运行时，可以执行本公开的上述图1～3所描述的中继UE的处理方法中的一个或几个步骤。
上文已经结合优选实施例对本公开的方法和涉及的设备进行了描述。本领域技术人员可以理解，上面示出的方法仅是示例性的，而且以上说明的各实施例在不发生矛盾的情况下能够相互组合。本发明的方法并不局限于上面示出的步骤和顺序。
上面示出的用户设备可以包括更多的模块，例如还可以包括可以开发的或者将来开发的可用于基站、MME、或UE的模块等等。上文中示出的各种标识仅是示例性的而不是限制性的，本公开并不局限于作为这些标识的示例的具体信元。本领域技术人员根据所示实施例的教导可以进行许多变化和修改。
应该理解，本公开的上述实施例可以通过软件、硬件或者软件和硬件两者的结合来实现。例如，上述实施例中的基站和用户设备内部的各种组件可以通过多种器件来实现，这些器件包括但不限于：模拟电路器件、数字电路器件、数字信号处理(DSP)电路、可编程处理器、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、可编程逻辑器件(CPLD)， 等等。
此外，运行在根据本发明的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本发明的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本发明各实施例功能的程序可以记录在计算机可读记录介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况下，本发明的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本发明并不局限于上述实施例。尽管已经描述了所述实施例的各种示例，但本发明并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作终端设备或通信设备，如AV设备、厨房设备、清洁设备、空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本发明的实施例进行了详细描述。但是，具体的结构并不局限于上述实施例，本发明也包括不偏离本发明主旨的任何设计改动。另外，可以在权利要求的范围内对本发明进行多种改动， 通过适当地组合不同实施例所公开的技术手段所得到的实施例也包含在本发明的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (10)

  1. 一种由中继UE执行的处理方法，所述中继UE为与其中继连接的至少一个远端UE提供寻呼中继服务，该处理方法包括：
    确定所述中继UE与由所述中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务是否发生了变更；以及
    如果所述中继UE与由所述中继UE提供寻呼中继服务的至少一个远端UE之间的寻呼中继服务发生了变更，则向基站发送报告消息，所述报告消息包括与所述寻呼中继服务的变更相关的远端UE的远端UE信息，所述远端UE信息至少包括相应远端UE的用于寻呼的UE标识信息，
    所述寻呼中继服务包括从基站处接收针对与所述中继UE中继连接的远端UE的寻呼消息，并将所述寻呼消息发送给与所述中继UE中继连接的远端UE。
  2. 根据权利要求1所述的处理方法，其中，所述寻呼中继服务的变更包括在所述中继UE与由所述中继UE提供寻呼中继服务的至少一个远端UE之间发生的新增寻呼中继服务和/或删除寻呼中继服务。
  3. 根据权利要求2所述的处理方法，其中，在接收到来自远端UE的寻呼中继服务请求时，确定发生了新增寻呼中继服务的变更，所述寻呼中继服务请求用于向所述中继UE请求为该远端UE提供寻呼中继服务，
    和/或
    在以下中的任一情况下，确定所述寻呼中继服务发生了删除寻呼中继服务的变更：
    由所述中继UE提供寻呼中继服务的所述至少一个远端UE中的远端UE与所述中继UE之间的中继连接被释放；
    由所述中继UE提供寻呼中继服务的所述至少一个远端UE中的远端UE进入了连接态；
    从由所述中继UE提供寻呼中继服务的所述至少一个远端UE中的远端UE接收到了停止寻呼中继服务指示，所述停止寻呼中继服务用于向所 述中继UE指示不再为该远端UE提供寻呼中继服务。
  4. 根据权利要求3所述的处理方法，其中，在所述寻呼中继服务的变更是因由所述中继UE提供寻呼中继服务的所述至少一个远端UE中的远端UE进入了连接态而发生时，不执行向基站发送所述报告消息的操作。
  5. 根据权利要求2-4中任一项所述的处理方法，其中，所述报告消息包括当前处于由所述中继UE提供寻呼中继服务的状态的远端UE的名单信息，所述名单信息被保存在所述中继UE中，所述处理方法还包括：
    在由所述中继UE提供向至少一个远端UE提供的寻呼中继服务发生了变更时，根据所述寻呼中继服务的变更，修改所述名单信息，
    其中，根据所述寻呼中继服务的变更，修改所述名单信息包括：
    如果所述寻呼中继服务的变更是新增寻呼中继服务，则将该新增寻呼中继服务所对应的远端UE的远端UE信息追加到所述名单信息中；和/或
    如果所述寻呼中继服务的变更是删除寻呼中继服务，则从所述名单信息中删除所述删除寻呼中继服务所对应的远端UE的远端UE信息。
  6. 根据权利要求2-4中任一项所述的处理方法，其中，所述报告消息包括新增名单信息/或删除名单信息，所述处理方法还包括：在由所述中继UE提供向至少一个远端UE提供的寻呼中继服务发生了变更时，
    如果所述变更是新增寻呼中继服务，则将该新增寻呼中继服务所对应的远端UE的远端UE信息记录为新增名单信息，所述新增名单信息包括在上次发送所述报告消息之后发生的新增寻呼中继服务所对应的远端UE的远端UE信息；和/或
    如果所述变更是删除寻呼中继服务，则将该新增寻呼中继服务所对应的远端UE的远端UE信息记录为删除名单信息，所述删除名单信息包括在上次发送所述报告消息之后发生的删除寻呼中继服务所对应的远端UE的远端UE信息。
  7. 根据权利要求1-4中任一项所述的处理方法，还包括：
    确定所述中继UE是否被使能了向所述基站发送报告消息，
    向基站发送包括被中继远端UE信息的报告消息包括：
    如果所述中继UE被使能了向所述基站发送报告消息，则向基站发送包括被中继远端UE信息的报告消息。
  8. 根据权利要求7所述的处理方法，其中，确定所述中继UE是否被使能了向所述基站发送报告消息包括：
    如果所述中继UE被配置了公共寻呼参数，则确定为所述中继UE被使能了向所述基站发送报告消息。
  9. 根据权利要求1-4中任一项所述的处理方法，其中，在所述中继UE发生了小区切换时，确定为由所述中继UE向至少一个远端UE提供的寻呼中继服务发生了变更，
    或者，
    所述处理方法还包括：
    确定所述中继UE是否发生了小区切换，并且，
    向切换后的小区所属的基站发送包括被中继远端UE信息的报告消息包括：
    在所述中继UE发生了小区切换并且所述寻呼中继服务发生了变更时，向切换后的小区所属的基站发送所述报告消息。
  10. 一种用户设备，包括：
    处理器；以及
    存储器，存储有指令，
    其中，所述指令在由所述处理器运行时执行根据权利要求1至9中任一项所述的处理方法。
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