WO2022237646A1 - 一种传输系统信息si的方法和装置 - Google Patents

一种传输系统信息si的方法和装置 Download PDF

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Publication number
WO2022237646A1
WO2022237646A1 PCT/CN2022/091229 CN2022091229W WO2022237646A1 WO 2022237646 A1 WO2022237646 A1 WO 2022237646A1 CN 2022091229 W CN2022091229 W CN 2022091229W WO 2022237646 A1 WO2022237646 A1 WO 2022237646A1
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Prior art keywords
terminal device
message
messages
sib
relay
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PCT/CN2022/091229
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English (en)
French (fr)
Inventor
潘晓丹
高云龙
彭文杰
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP22806612.2A priority Critical patent/EP4329340A1/en
Publication of WO2022237646A1 publication Critical patent/WO2022237646A1/zh
Priority to US18/504,881 priority patent/US20240080644A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information

Definitions

  • the present application relates to the field of communications, and more specifically, to a method and device for transmitting system information SI in the field of communications.
  • the relay technology from terminal equipment to network equipment is introduced, that is, the "UE-to-Network relay" communication system, which can include wireless access equipment, remote user equipment (remote user equipment, remote UE) and relay equipment (relay UE), etc.
  • a communication connection is established between the relay UE and the wireless access device, and a sidelink (sidelink, SL) connection is established between the remote UE and the relay UE, and the remote UE can establish a connection with the wireless access device through the relay UE to obtain Internet service.
  • the relay UE and the wireless access device can communicate through the Uu interface, and the remote UE and the relay UE can communicate through the PC5 interface.
  • the base station is used as the wireless access device, and the base station can broadcast system information (system information, SI) to the relay UE.
  • SI system information
  • the remote UE can request the relay UE to obtain the SI through the PC5 interface radio resource control (PC5 radio resource control, PC5-RRC) message or PC5-S signaling (PC5-S signaling, PC5-S) , that is, the "on-demand SI" method, and then the relay UE requests the SI from the base station. After the relay UE obtains the SI broadcast by the base station, it sends the SI to the remote UE through unicast communication on the SL.
  • PC5 interface radio resource control PC5 radio resource control, PC5-RRC
  • PC5-S signaling PC5-S signaling
  • each remote UE When a relay UE is connected to multiple remote UEs, and multiple remote UEs request the same SI from the relay UE, each remote UE needs to request the SI from the relay UE through the PC5-RRC message, and then the relay UE needs to send the same SI On the SL, it is sent to each remote UE through unicast communication.
  • the SI transmission process needs to allocate sidelink resources for the unicast communication between the relay UE and each remote UE, which may occupy more SL resources, resulting in waste of SL resources and low transmission efficiency. Therefore, how the relay UE forwards the SI to the remote UE is an urgent problem to be solved at present.
  • the present application provides a method and device for transmitting system information SI.
  • the method can transmit the SI on the SL in a multicast or broadcast manner, which improves the transmission efficiency and update efficiency of the SI.
  • a method for transmitting information is provided, wherein the method is applied to a system including a first terminal device and one or more second terminal devices, and the first terminal device and each of the second terminal devices Two terminal devices establish a side link SL connection, and each second terminal device obtains network services of a target cell through the first terminal device, and the target cell is a serving cell of the first terminal device, so
  • the methods described include:
  • the first terminal device receives a first request message sent by the one or more second terminal devices, where the first request message is used to request acquisition of M system information block SIBs or system information SI messages of the target cell ;
  • the first terminal device determines N target identifiers corresponding to the M SIB or SI messages, where N is an integer greater than or equal to 1 and N ⁇ M;
  • the first terminal device sends a second message to the one or more second terminal devices in a broadcast or multicast manner, the second message includes the M SIB or SI messages, and the second message Include the corresponding target ID.
  • the remote UE may send a first request message to the relay UE to request to obtain the system information it needs.
  • the first request message may be used for M SI messages required by one or more remote UE requests, or the first request message may be used for M SIBs required by one or more remote UE requests, each
  • the system message requested by a remote UE may be one or more SI messages in the M SI messages, or the system message requested by each remote UE may be one or more SIBs in the M SIBs. Not limited.
  • the second message may represent a message, for example, the second message is a broadcast message, that is, the broadcast message includes all M SIB or SI messages requested by the one or more second terminal devices.
  • the second message may also represent multiple messages, for example, the second message corresponds to multiple multicast messages, that is, the multiple multicast messages include all M
  • Each multicast message may include one or several SIB or SI messages requested by the current second terminal device, and the SIB and SI contained in each multicast message belong to the same group.
  • sending the second message and “sending M SIB or SI messages” have the same meaning, that is, the first terminal device sends one or more messages to the one or more Multiple second terminal devices send the requested SIB or SI message. It should be understood that whether the second message is taken as one message or corresponds to multiple independent different messages, all fall within the scope of protection of the embodiments of the present application, and details will not be described later.
  • the relay UE can send an SI message or send an SIB to one or more remote UEs in the form of a multicast message or a broadcast message.
  • the relay UE sends an SI message or SIB to one or more remote UEs in the form of a broadcast message, it prevents the relay UE from occupying more SL resources through unicast communication to send system information to multiple remote UEs , thereby saving communication resources.
  • the relay UE when the relay UE receives SI requests sent by one or more remote UEs and requests to obtain SI messages or SIBs, the relay UE can group all SI messages or SIBs into one group and assign a multicast identifier L2ID to the group, and Send this multicast identifier L2ID to each remote UE by unicast. Or, classify all SI messages or SIBs into multiple groups (such as N groups) and assign a multicast identifier L2ID to each group, and pass this multicast identifier L2ID and SI message or SIB in a unicast manner The first mapping relationship is sent to each remote UE.
  • groups such as N groups
  • Subsequent relay UEs can send SI to the one or more remote UEs by sending a multicast message on the SL, which improves the efficiency of SI transmission.
  • the relay UE can also maintain information about the first mapping relationship between the multicast identifier L2ID and the SI message or SIB, and notify the relevant remote through unicast on the SL The UE further improves the transmission efficiency and update efficiency of the SI.
  • the first request message may pass radio resource control RRC signaling on the sidelink, or media access control (media access control, MAC)-control element (control element, CE), or pass Sidelink control information (SCI), or PC5-S signaling (PC5-S signaling) is sent.
  • RRC radio resource control
  • MAC media access control
  • CE control element
  • SCI pass Sidelink control information
  • PC5-S signaling PC5-S signaling
  • the remote UE can send a system message request to the relay UE through PC5-RRC signaling.
  • the first terminal device determining the N target identities corresponding to the M SIB or SI messages includes:
  • the first terminal device determines that the M SIB or SI messages correspond to the same target identifier, and the target identifier indicates that the M SIB or SI messages are sent by broadcast; or
  • the first terminal device determines that each of the M SIB or SI messages corresponds to a different target identifier, and the target identifier indicates that the M SIB or SI messages are sent in a multicast manner; or
  • the first terminal device determines that K SIBs or SI messages in the M SIBs or SI messages correspond to the same target identifier, 1 ⁇ K ⁇ M, and the target identifier indicates that the M SIBs or SI messages are sent in multicast mode. SIB or SI message.
  • the application layer will provide the information of the multicast ID, and the relay UE can convert the multicast ID into a DST ID; if the information of the multicast ID is not provided, the relay UE can use the service type in the broadcast mechanism To determine the mapping relationship to DST ID.
  • the relay UE when the remote UE requests SI from the relay UE in an on-demand manner, the relay UE can send the SI to the remote UE through multicast, and the remote UE can send all the M SIs requested by the relay UE
  • the message is divided into N groups, and a multicast identifier L2ID is assigned to each group, so that the remote UE can use the different multicast identifier L2ID to receive SI messages of different groups.
  • the base station can also perform grouping according to historical system message request information. For example, the base station can divide system messages that are usually requested together into a group according to historical information, and then inform the relay UE of the grouping information, and then the relay UE will Different groups are assigned L2IDs, and the base station can also assign L2IDs, and inform the relay UE of the correspondence between groups and L2IDs. Finally, the relay UE directly applies the mapping relationship configured by the base station.
  • the relay UE can also update the grouping method as needed. For example, according to the current or recent system message request status of the remote UE, the SIB messages or SI messages requested by the remote UE at the same time are divided into a group as much as possible, so that they can be grouped together at the same time.
  • a multicast message can be delivered to remote UEs. For example, remote UE1 requests SI message 1 and SI message 2, and remote UE2 requests SI message 2 and SI message 3, then SI message1, SI message2 and SI message3 can be divided into a group. If after a period of time, the relay UE finds that the remote UE no longer requests SI message 1 and SI message 2 or SI message 2 and SI message 3 at the same time, it will update the grouping and mapping relationship accordingly.
  • the target identifier is a preset identifier.
  • the second message when the M SIB or SI messages correspond to the same target identifier, the second message further includes the identifier of the first terminal device .
  • all remote UEs connected under the relay UE can be assigned a broadcast identifier L2ID for broadcast transmission.
  • the relay UE will use the same broadcast identifier L2ID to send broadcast messages to all remote UEs, correspondingly , the remote UE will use the broadcast identifier L2ID to receive the broadcast message of the relay UE, and the broadcast message may include M SIBs or M SI messages requested by one or more remote UEs.
  • the relay UE can send SI messages or SIBs to one or more remote UEs in the form of broadcast messages.
  • the relay UEs are prevented from communicating through unicast Occupy more SL resources to send system information to multiple remote UEs, thus saving communication resources.
  • the method further includes:
  • the first terminal device sends information about a first mapping relationship to the one or more second terminal devices, where the first mapping relationship is used to indicate the relationship between the M SIB or SI messages and the N target identifiers Correspondence between.
  • the method further includes:
  • the first terminal device sends information about the updated first mapping relationship to the second terminal device; and/or
  • the first terminal device When a third terminal device accesses the first terminal device, the first terminal device sends information about the first mapping relationship to the third terminal device.
  • the relay UE can directly send the first mapping relationship to the remote UE, or, when the remote UE receives the first request message sent by the relay UE, the relay UE The first mapping relationship can be directly sent to the remote UE, which is not limited in this embodiment of the present application.
  • the first terminal device when the first mapping relationship changes, the first terminal device sends updated information about the first mapping relationship to the second terminal device.
  • the relay UE may send the new remote UE (such as a third terminal device) the Information about the first mapping relationship.
  • the method further includes: the first A terminal device sends information about a target identifier corresponding to the second message to the one or more second terminal devices, where the target identifier is determined by the first terminal device according to a first mapping relationship, and the first The mapping relationship is used to indicate the corresponding relationship between the M SIB or SI messages and the N target identifiers.
  • the relay UE when the remote UE requests SI from the relay UE in an on-demand manner, the relay UE can send the SI to the remote UE through multicast, and the remote UE can send the M SI messages requested by the relay UE as N groups, and assign a multicast identifier L2ID to each group.
  • the relay UE can inform the remote UE of the multicast identifier L2ID corresponding to the currently requested SI message, or inform the remote UE of the correspondence between the SI message and the multicast identifier, or inform the remote UE of the correspondence between the SIB and the multicast identifier UE, so that the remote UE uses the multicast identifier L2ID corresponding to each group of SI messages to receive the requested SI.
  • the The method further includes: the first terminal device receiving the M SIB or SI messages periodically broadcast by the network device; and/or the first terminal device sending the first request message to the network device; the The first terminal device receives the M SIB or SI messages sent by the network device.
  • the first terminal device sends the second message to the one or more second terminal devices in a broadcast or multicast manner, including:
  • the first terminal device periodically sends the second message to the one or more second terminal devices.
  • the multicast period of the relay UE can also refer to the period configuration in SIB1, for example, determine the multicast period in combination with the period in SI-SchedulingInfo.
  • the relay UE may reconfigure a multicast period and inform the remote UE of it. Or, it can also be configured according to the new timer.
  • the first request message is sent through radio resource control RRC signaling or medium access control MAC CE signaling or sidelink control information SCI.
  • the method further includes: the first terminal device receiving a feedback message sent by the one or more second terminal devices, the feedback message Used to indicate whether the second message is received successfully; the first terminal device stops sending the second message.
  • the process of sending feedback messages may correspond to different implementation processes.
  • the first terminal device sends the second message to one or more second terminal devices by broadcasting a message
  • the first terminal device receives the second message from one or more second terminal devices Feedback messages from all the second terminal devices in the system, and according to the feedback message, when it is determined that all the second terminal devices in the one or more second terminal devices have successfully received the second message, the first terminal device stops sending broadcast message.
  • the first terminal device sends the second message to one or more second terminal devices by means of a multicast message, because different groups send different multicast messages (for example, N groups send N different multicast messages), then when the first terminal device receives the feedback messages of all the second terminal devices corresponding to each group that sent the first request message, and determines according to the feedback message When all the second terminal devices corresponding to each group that have sent the first request message have successfully received the second message, the first terminal device stops sending the multicast message.
  • different groups For example, N groups send N different multicast messages
  • the method may preset the number of times the first terminal device sends broadcast messages and multicast messages to the second terminal device.
  • the relay UE may only send a multicast message or a broadcast message to one or more remote UEs three times, and then stop sending, which is not limited in this embodiment of the present application.
  • a second aspect provides a method for transmitting information, wherein the method is applied to a system including a first terminal device and one or more second terminal devices, and the first terminal device and each of the second terminal devices Two terminal devices establish a side link SL connection, and each second terminal device obtains network services of a target cell through the first terminal device, and the target cell is a serving cell of the first terminal device, so
  • the methods described include:
  • the one or more second terminal devices send a first request message to the first terminal device, where the first request message is used to request acquisition of M system information block SIBs or system information SI messages of the target cell;
  • the one or more second terminal devices receive the second message sent by the first terminal device in a broadcast or multicast manner, where the second message includes the M SIB or SI messages, and the M One SIB or SI message corresponds to N target identifiers, and the second message includes the corresponding target identifiers, N is an integer greater than or equal to 1 and N ⁇ M.
  • the M SIB or SI messages correspond to a same target identifier, and the target identifier instructs the first terminal device to send the M SIB or SI messages in a broadcast manner.
  • SI message or
  • Each of the M SIB or SI messages corresponds to a different target identifier, and the target identifier instructs the first terminal device to send the M SIB or SI messages in a multicast manner;
  • K SIBs or SI messages in the M SIBs or SI messages correspond to the same target identifier, 1 ⁇ K ⁇ M, and the target identifier instructs the first terminal device to send the M SIBs in multicast mode or SI messages.
  • the target identifier is a preset identifier.
  • the second message when the M SIB or SI messages correspond to the same target identifier, the second message further includes the identifier of the first terminal device , and the method further includes:
  • the one or more second terminal devices receive the second message sent by the first terminal device and including the identifier of the first terminal device;
  • the method further includes:
  • the one or more second terminal devices receive the first mapping relationship information sent by the first terminal device, and the first mapping relationship is used to indicate the M SIB or SI messages and the N target identifiers Correspondence between;
  • the one or more second terminal devices determine, according to the information of the first mapping relationship, a target identifier for receiving the second message sent by the first terminal device;
  • the one or more second terminal devices receive the second message including the target identifier sent by the first terminal device;
  • the method further includes: when the first mapping relationship changes, the one or more second terminal devices receive the first terminal Information about the updated first mapping relationship sent by the device; and/or when a third terminal device accesses the first terminal device, the first terminal device sends the first mapping to the third terminal device relationship information.
  • the method further includes: the one or more second terminal devices receiving the information corresponding to the second message sent by the first terminal device Information about target identities, where the target identities are determined by the first terminal device according to a first mapping relationship, and the first mapping relationship is used to indicate the relationship between the M SIB or SI messages and the N target identities corresponding relationship.
  • the one or more second terminal devices receive the M SIBs or SIBs sent by the first terminal device through broadcast or multicast.
  • the SI message includes: the one or more second terminal devices periodically receive the M SIB or SI messages sent by the first terminal device in a broadcast or multicast manner.
  • the first request message is sent through radio resource control RRC signaling or medium access control MAC CE signaling or sidelink control information SCI.
  • the method further includes: the one or more second terminal devices sending a feedback message to the first terminal device, and the feedback message uses To indicate whether the second message is successfully received; the one or more second terminal devices stop receiving the second message sent by the first terminal device.
  • an apparatus for transmitting information wherein the apparatus establishes a side link SL connection with each second terminal equipment among one or more second terminal equipments, and each of the The second terminal device obtains the network service of the target cell through the device, the target cell is the serving cell of the device, and the device includes:
  • a communication unit configured to receive a first request message sent by the one or more second terminal devices, where the first request message is used to request acquisition of M system information block SIBs or system information SI messages of the target cell;
  • a determining unit configured to determine N target identifiers corresponding to the M SIB or SI messages, where N is an integer greater than or equal to 1 and N ⁇ M;
  • the communication unit is further configured to send a second message to the one or more second terminal devices in a broadcast or multicast manner, where the second message includes the M SIB or SI messages, and the first Two messages include corresponding target identifications.
  • the determining unit is further configured to determine that the M SIB or SI messages correspond to the same target identifier, and the target identifier indicates that the M SIB or SI messages are sent by broadcasting. SIB or SI messages; or
  • the determining unit is also used to determine that each of the M SIB or SI messages corresponds to a different target identifier, and the target identifier indicates that the M SIB or SI messages are sent by multicast; or
  • the determination unit is also used to determine that K SIBs or SI messages in the M SIBs or SI messages correspond to the same target identifier, 1 ⁇ K ⁇ M, and the target identifier indicates that the M A SIB or SI message.
  • the target identifier is a preset identifier.
  • the second message when the M SIB or SI messages correspond to a same target identifier, the second message further includes the device identifier of the apparatus.
  • the communication unit is further configured to send information about a first mapping relationship to the one or more second terminal devices, and the first mapping relationship The relationship is used to indicate the corresponding relationship between the M SIB or SI messages and the N target identifiers.
  • the communication unit when the first mapping relationship changes, is further configured to send the updated first mapping relationship to the second terminal device information; and/or
  • the communication unit is further configured to send information about the first mapping relationship to the third terminal device.
  • the communication unit is further configured to send a message to the one or a plurality of second terminal devices sending the information of the target identifier corresponding to the second message, the target identifier is determined by the apparatus according to the first mapping relationship, and the first mapping relationship is used to indicate the M SIBs Or the correspondence between the SI message and the N target identifiers.
  • the communication unit before the communication unit sends the second message to the one or more second terminal devices through broadcast or multicast, it is further configured to receive The M SIB or SI messages periodically broadcast by the network device; and/or, the communication unit is also used for:
  • the communication unit is further configured to periodically send the second message to the one or more second terminal devices.
  • the first request message is sent through radio resource control RRC signaling or medium access control MAC CE signaling or sidelink control information SCI.
  • the communication unit is further configured to receive a feedback message sent by the one or more second terminal devices, where the feedback message is used to indicate whether the receiving the second message;
  • the determining unit is further configured to stop sending the second message.
  • an apparatus for transmitting information wherein each of the one or more apparatuses establishes a sidelink SL connection with the first terminal device, and each of the apparatuses uses the The first terminal device acquires network services of a target cell, where the target cell is a serving cell of the first terminal device, and the apparatus includes:
  • a communication unit configured to send a first request message to the first terminal device, where the first request message is used to request acquisition of M system information block SIBs or system information SI messages of the target cell;
  • the communication unit is further configured to receive the second message sent by the first terminal device through broadcast or multicast, the second message includes the M SIB or SI messages, and the M SIB Or the SI message corresponds to N target identifiers, and the second message includes the corresponding target identifiers, N is an integer greater than or equal to 1 and N ⁇ M.
  • the M SIB or SI messages correspond to a same target identifier, and the target identifier instructs the first terminal device to send the M SIB or SI messages in a broadcast manner.
  • SI message or
  • Each of the M SIB or SI messages corresponds to a different target identifier, and the target identifier instructs the first terminal device to send the M SIB or SI messages in a multicast manner;
  • K SIBs or SI messages in the M SIBs or SI messages correspond to the same target identifier, 1 ⁇ K ⁇ M, and the target identifier instructs the first terminal device to send the M SIBs in multicast mode or SI messages.
  • the target identifier is a preset identifier.
  • the second message when the M SIB or SI messages correspond to the same target identifier, the second message further includes the identifier of the first terminal device , and the communication unit is further configured to receive the second message sent by the first terminal device and including the identifier of the first terminal device;
  • the determining unit is further configured to acquire a corresponding SIB or SI message according to the second message.
  • the communication unit is further configured to receive information about a first mapping relationship sent by the first terminal device, where the first mapping relationship is used to indicate Correspondence between the M SIB or SI messages and the N target identifiers;
  • the determining unit is further configured to determine a target identifier for receiving the second message sent by the first terminal device according to the information of the first mapping relationship;
  • the communication unit is further configured to receive the second message including the target identifier sent by the first terminal device;
  • the determining unit is further configured to acquire a corresponding SIB or SI message according to the second message.
  • the communication unit when the first mapping relationship changes, is further configured to receive an updated first mapping sent by the first terminal device and/or when a third terminal device accesses the first terminal device, the communication unit is further configured to send information about the first mapping relationship to the third terminal device.
  • the communication unit is further configured to receive information about a target identifier corresponding to the second message sent by the first terminal device, and the target identifier It is determined by the first terminal device according to the first mapping relationship, where the first mapping relationship is used to indicate the correspondence between the M SIB or SI messages and the N target identifiers.
  • the communication unit is further configured to receive the M SIB or SI messages sent by the first terminal device in a broadcast or multicast manner, include:
  • the communication unit is further configured to periodically receive the M SIB or SI messages sent by the first terminal device in a broadcast or multicast manner.
  • the first request message is sent through radio resource control RRC signaling or medium access control MAC CE signaling or sidelink control information SCI.
  • the communication unit is further configured to send a feedback message to the first terminal device, where the feedback message is used to indicate whether each of the apparatuses is successful receiving the second message;
  • the determining unit is further configured to stop receiving the second message sent by the first terminal device.
  • a fifth aspect provides an apparatus, where the communication apparatus has a function of implementing the first terminal device in the method design of the first aspect. These functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware.
  • the hardware or software includes one or more units corresponding to the above functions.
  • a sixth aspect provides an apparatus, where the communication apparatus has a function of implementing the second terminal device in the method design of the second aspect above. These functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware.
  • the hardware or software includes one or more units corresponding to the above functions.
  • a terminal device including a transceiver and a processor.
  • the terminal device further includes a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the terminal device performs any one of the first aspect or the first aspect.
  • the method in an implementation manner, or causing the terminal device to execute the method in the second aspect or any possible implementation manner of the second aspect.
  • a network device including a transceiver and a processor.
  • the network device further includes a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the network device implements any possibility in the first aspect or the second aspect above The steps performed by the network device in the implementation manner.
  • a ninth aspect provides a communication system, and the system includes the first terminal device of the third aspect and the second terminal device of the fourth aspect; or, the system may further include the network device of the eighth aspect.
  • a communication device is provided, and the communication device may be the terminal device designed by the above method, or a chip set in the terminal device.
  • the communication device includes: a processor, coupled with a memory, and can be used to execute instructions in the memory, so as to implement the method performed by the first terminal device in any possible implementation manner of the above first aspect or the first aspect, or to implement The method performed by the second terminal device in the above second aspect or any possible implementation manner of the second aspect.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, and the processor is coupled to the communication interface.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a communication device in an eleventh aspect, is provided, and the communication device may be the network device designed in the above method, or a chip set in the network device.
  • the communications apparatus includes: a processor, coupled to a memory, and configured to execute instructions in the memory, so as to implement the method performed by the network device in any possible implementation manner of the first aspect or the second aspect above.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, and the processor is coupled to the communication interface.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a computer program product comprising: computer program code, when the computer program code is run on a computer, the computer is made to execute the methods in the above aspects.
  • a computer-readable medium stores program codes, and when the computer program codes run on a computer, the computer executes the methods in the above aspects.
  • Fig. 1 is a schematic structural diagram of a mobile communication system applicable to the embodiment of the present application.
  • Fig. 2 is a schematic flowchart of a method for transmitting system information SI provided by an embodiment of the present application.
  • Fig. 3 is a schematic flow chart of another example of a method for transmitting system information SI provided by an embodiment of the present application.
  • Fig. 4 is a schematic block diagram of an example of an apparatus for transmitting system information SI provided by an embodiment of the present application.
  • Fig. 5 is a schematic block diagram of another example of an apparatus for transmitting system information SI provided by an embodiment of the present application.
  • Fig. 6 is a schematic block diagram of another example of an apparatus for transmitting system information SI provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of an example of a terminal device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of another example of a terminal device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of an example of a network device provided by an embodiment of the present application.
  • first”, “second” and “third” in the embodiments of the present application are only for distinction and shall not constitute any limitation to the present application.
  • first terminal device “second terminal device” and “third terminal device” in the embodiments of the present application refer to different terminal devices in the mobile communication system.
  • sequence numbers of the processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • preset and “predefined” can be used to indicate related information, and this application does not limit its specific implementation, such as the preset identification in the embodiment of this application.
  • feedback information may also be referred to as “negative acknowledgment (NACK)", “acknowledgment (ACK)” or other information, etc., the embodiment of the present application There is no limit to this.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • 5G fifth generation mobile communication system
  • new radio new radio, NR
  • Fig. 1 is a schematic structural diagram of a mobile communication system applicable to the embodiment of the present application.
  • the wireless communication system 100 may include at least two terminal devices (such as a terminal device 110 and a terminal device 120, etc.), a wireless access network device 130, and the like.
  • the terminal device 120 may be connected to the radio access network device 130 through wireless access.
  • the terminal device 110 and the terminal device 120 may be fixed-position devices, or may be mobile devices.
  • the wireless access network device 130 is an access device for the terminal device 120 to access the mobile communication system through wireless means.
  • the wireless access network device 130 may be: a base station, an evolved base station (evolved node B, eNB), a home base station, an access point (access point, AP) in a wireless fidelity (wireless fidelity, WIFI) system, a wireless Relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP), etc.
  • a wireless fidelity wireless fidelity
  • WIFI wireless fidelity
  • TP transmission point
  • TRP transmission and reception point
  • the gNB in the NR system
  • the gNB can also be a component or part of the base station Equipment, such as a central unit (central unit, CU), a distributed unit (distributed unit, DU) or a baseband unit (baseband unit, BBU), etc.
  • the embodiment of the present application uses specific technologies and specific The device form
  • a gNB may include a centralized unit (CU) and a distributed unit (DU).
  • the gNB may also include an active antenna unit (AAU).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and realizing the functions of radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layer.
  • the DU is responsible for processing physical layer protocols and real-time services, realizing the functions of the radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer and physical (physical, PHY) layer.
  • the AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , or, sent by DU+AAU.
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in an access network (radio access network, RAN), and the CU can also be divided into network devices in a core network (core network, CN), which is not limited in this application.
  • the radio access network device 130 may be referred to as "network device” for short. Unless otherwise specified, in the embodiment of the present application, the network device refers to the radio access network device. In this embodiment of the present application, the network device may refer to the network device itself, or may be a chip applied to the network device to complete the wireless communication processing function.
  • the terminal equipment 110 and the terminal equipment 120 in the wireless communication system 100 may also be referred to as terminals, user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) and so on.
  • the terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, or it may be applied to virtual reality (virtual reality, VR), augmented reality (augmented reality, AR) ), industrial control, self driving, remote medical, smart grid, transportation safety, smart city and smart home ) and other wireless terminals in scenarios.
  • virtual reality virtual reality
  • AR augmented reality
  • industrial control self driving
  • remote medical smart grid
  • transportation safety smart city and smart home
  • FIG. 1 is only a schematic diagram, and the wireless communication system 100 may also include other network devices, such as core network devices, wireless relay devices, and wireless backhaul devices, which are not shown in FIG. 1 .
  • the embodiment of the present application does not limit the number and type of devices included in the wireless communication system 100 .
  • a link used to carry uplink control information and/or uplink data is called an uplink (uplink, UL).
  • the physical uplink channel may include a physical uplink control channel (physical uplink) defined in the LTE protocol or the NR protocol. control channel, PUCCH), physical uplink shared channel (physical uplink share channel, PUSCH), and other uplink channels with the above functions defined as the network evolves.
  • the link used to carry downlink control information and/or downlink data is called a downlink (downlink, DL).
  • the physical downlink channel may include a physical downlink control channel (physical downlink control channel, PDCCH), a physical uplink shared channel (physical downlink share channel, PDSCH) and other downlink channels with the above functions defined as the network evolves, which are not limited in this embodiment of the present application.
  • PDCCH physical downlink control channel
  • PDSCH physical uplink shared channel
  • data communication can also be performed between the terminal device 110 and the terminal device 120 in the wireless communication system 100, that is, the terminal device 110 and the terminal device 120 can directly perform communication between the terminal device 110 and the terminal device 120 without using network devices. data communication between them.
  • the interface between the terminal device 110 and the terminal device 120 is called a PC5 interface
  • the link between the terminal device 110 and the terminal device 120 is called a sidelink (sidelink, SL).
  • the wireless communication system 100 described above including the wireless access network device 130, the terminal device 120, and the terminal device 110 may be called a "UE-to-Network relay" system, the terminal device 120 may be called a "relay UE", and the terminal device 110 Can be called “remote UE”.
  • the base station is used as the wireless access network device 130, a connection is established between the base station and the terminal device 120, and an SL connection is established between the terminal device 120 and the terminal device 110, and the terminal device 120 can help the terminal device 110 access the base station to obtain network services.
  • the terminal device 120 may forward the data obtained from the base station to the terminal device 110 .
  • the terminal device 120 can obtain data from the terminal device 110 and forward it to the base station. This technology can improve the coverage of the cell.
  • the terminal device 110 resides in the target cell under the radio access network device 130 through the terminal device 120 and has no data service.
  • V2X vehicle to everything
  • vehicle network system is a typical "UE-to-Network relay" system.
  • V2X is a new generation of information and communication technology that connects vehicles to everything, where V represents a vehicle, and X represents any object that interacts with a vehicle, such as vehicles, people, traffic roadside infrastructure, and networks.
  • V2X is one of the fields with the most industrial potential and the clearest market demand in the Internet of Things system. It has the characteristics of wide application space, great industrial potential and strong social benefits.
  • the Internet of Vehicles collects vehicle information through on-board sensors, on-board terminals and other equipment, and realizes vehicle-to-vehicle (Vehicle-to-Vehicle, V2V), vehicle-to-Pedestrian (V2P), vehicle-to-roadside communication technology through V2X communication technology.
  • V2V vehicle-to-Vehicle
  • V2P vehicle-to-Pedestrian
  • V2X vehicle-to-roadside communication technology
  • the communication between the infrastructure Vehicle-to-Infrastructure, V2I
  • the vehicle and the network Vehicle-to-Network, V2N
  • the Internet of Vehicles will become the basic component of the intelligent transportation system in the future.
  • each vehicle can be understood as a terminal device, which can be called "V2X UE".
  • the NR PC5 interface is a direct communication interface between V2X UEs.
  • both the terminal device 110 and the terminal device 120 can be used as "V2X UE”
  • the direct communication link between the terminal device 110 and the terminal device 120 is an SL link
  • the terminal device 110 and the terminal device 120 Data transmission can be directly performed between terminal devices 120 through SL, and data transmission does not need to be performed through a network, which can effectively reduce communication delay.
  • the wireless communication system 100 may also include a V2X application server, etc., and the terminal device 120 may also send V2X-related data to the base station 130 through the NR Uu interface, and the base station 130 then sends the V2X-related data to the V2X
  • the application server performs processing, and then forwards the processed data to the terminal device 110 of the recipient via the terminal device 120, which is not limited in this embodiment of the present application.
  • the embodiments of the present application can also be applied to other more device-to-device (D2D) data transmissions, and the embodiments of the present application do not limit the application scenarios .
  • D2D device-to-device
  • the SL link between the terminal device 110 (remote UE) and the terminal device 120 (relay UE) may support broadcast, unicast, and multicast communication.
  • the terminal device 120 may send unencrypted broadcast service data to the outside.
  • the terminal equipment 120 can be used as a transmitting equipment (transmitting equipment, TX), and any other terminal equipment within the effective receiving range of the terminal equipment 120 can be used as a receiving equipment (receiving equipment, RX), such as a terminal
  • TX transmitting equipment
  • RX receiving equipment
  • the device 110 and the like can receive the data of the broadcast service if they are interested in the broadcast service.
  • Unicast communication requires the establishment of a unicast connection between two terminal devices (such as TX and RX). After the two terminal devices establish a unicast connection, data communication can be performed based on the negotiated identifier. The data can be encrypted or encrypted. Can be unencrypted. Compared with broadcast communication, in unicast communication, the unicast communication can only be performed between two terminal devices that have established a unicast connection. The unicast communication is similar to the data communication process performed after a radio resource control (radio resource control, RRC) connection is established between the terminal device and the network device, and will not be repeated here.
  • RRC radio resource control
  • Multicast communication refers to the communication between all terminal devices in a communication group. Any terminal device in the group can be used as TX or RX to receive or send the data of the multicast service. Terminal devices that do not belong to the communication group do not It will receive and analyze the data of the multicast service.
  • SI system information
  • SI System information
  • the SI can be broadcast by the base station to the terminal equipment, and the SI contains the minimum system information (minimum system
  • MSI mobile information
  • OSI other system information
  • the MSI includes the master information block (MIB) of basic information for initial access, and the scheduling information of system information block 1 (system information block 1, SIB1). SIB1 can also be called (remaining minimum SI, RMSI).
  • the MIB defines the most basic system information of the cell and the parameters required for decoding SIB1, and the MIB is transmitted on a physical broadcast channel (PBCH).
  • SIB1 contains some parameters necessary for random access, such as cell selection parameters, access control parameters, channel configuration information related to initial access, system message request configuration information, scheduling configuration of other system messages, etc., that is, SIB1 contains other SIBs Scheduling information.
  • the terminal equipment cannot camp in this cell.
  • the scheduling period of the MSI is fixed, wherein the period of the MIB is 80 milliseconds (millisecond, ms) and the period of the SIB1 is 160 ms.
  • OSI includes all other SIBs except MSI, that is, SIB2 to SIBn, and is carried on the physical downlink control channel (PDSCH), supports periodic broadcast, mainly includes cell reselection parameters, public safety and other parameters Wait.
  • PDSCH physical downlink control channel
  • OSI scheduling is sent in units of system information messages (SI messages).
  • SI messages system information messages
  • Each SI message includes one or more SIBs with the same scheduling requirements except SIB1, and all SIBs included in an SI message have the same transmission period.
  • Table 1 shows a possible mapping relationship between SI message and SIB.
  • the mapping relationship between SI message and SIB is included in SIB1 and indicated in the information element SI-schedulingInfo.
  • the SI-schedulingInfo information element contains multiple schedulingInfo, and each schedulingInfo contains a mapping relationship between SI message and SIB.
  • schedulingInfo 1 indicates that SIB2 and SIB3 are mapped to SI message 1; schedulingInfo 2 indicates that SIB4 and SIB5 are mapped to SI message 2; schedulingInfo 3 indicates that SIB6 and SIB7 are mapped to SI message 3, etc.
  • mapping relationship between SIB and SI message follows the following rules:
  • SIBs of the same transmission period can be mapped to the same SI message, or can be mapped to different SI messages, and each SIB is only included in one SI message.
  • SI-windows system information-windows
  • One SI message can be associated with one SI-window, and only this SI message can be sent in this SI-window and can be sent repeatedly.
  • the specific number of sending times, which time slots (slots) to send, etc., may depend on the implementation of the base station, but other SI messages cannot be sent within one SI-window.
  • Each SI message contains at least one SIB, and SIBs of the same scheduling period can be transmitted in the same SI message.
  • the gNB tells the UE which SI messages there are through SIB1, which SIBs each SI message contains, which SI-window these SI messages will be sent, and the time domain position and length of the SI-window. In addition, the gNB will not tell the UE which subframes in the SI window the SI message is scheduled for.
  • SI-RNTI system information-radio network temporary identifier
  • the UE will use the system information-radio network temporary identifier (SI-RNTI) in each subframe of the SI-window associated with the SI message corresponding to the SIB to try to decode Downlink control information (DCI) until the SI message is successfully received. For example, starting from the initial subframe of the SI-window, try to decode the DCI within SI-window Length subframes except for subframes in which the SI cannot be scheduled.
  • SI-RNTI system information-radio network temporary identifier
  • the UE can also obtain the OSI in an on-demand manner, that is, request other system information (on demand other system information, ODOSI).
  • OSI on demand other system information
  • Whether to use on-demand SI can be indicated by the SI-BroadcastStatus signaling in SchedulingInfo. If it is notBroadcasting, it means on-demand SI.
  • the terminal device when the terminal device is in the radio resource control connection state (radio resource control CONNECT, RRC CONNECT), it can request to obtain the OSI through the RRC dedicated signaling DedicatedSIBRequest, and the minimum request
  • the granularity is SIB.
  • SIB1 indicates that ODOSI is supported, and the SI-SchedulingInfo field includes SI-RequestConfig or SI-RequestConfigSUL, it indicates that the on- demand process to obtain OSI.
  • This field is configured with SI request-specific random access resources, including the correspondence between SI and preamble, that is, the preamble corresponding to the requested SI is selected when sending random access.
  • RRC will trigger the MAC layer to use the PRACH preamble(s) and PRACH resource(s) contained in the SI-RequestConfig message to initiate the initial random access process.
  • the UE notifies the network side by using Msg1 to request OSI.
  • SI-SchedulingInfo in SIB1 does not contain SI-RequestConfig or SI-RequestConfigSUL, the UE shall trigger the RRC signaling RRCSystemInfoRequest to notify the base station to obtain these system information.
  • OSI is requested through MSG3 (message 3 for competitive random access).
  • the base station After receiving the request message from the UE, the base station instructs the UE to receive it in the corresponding SI-window through the PDCCH DCI.
  • SI transmission described in the embodiment of the present application can be understood as a transmission process mainly for OSI, that is, in the "UE-to-Network relay" system, the process of transmitting OSI between the relay UE and the remote UE.
  • Fig. 2 is a schematic flowchart of a method for transmitting system information SI provided by an embodiment of the present application.
  • the method 200 may be applied to the wireless communication system 100 including the first terminal equipment (relay UE), the second terminal equipment (remote UE) and the network equipment (base station), wherein the first terminal equipment (relay UE) and a or multiple second terminal devices (remote UEs) establish a sidelink SL connection, and each of the second terminal devices obtains the network service of the target cell through the first terminal device, and the target cell is the second terminal device A serving cell of a terminal device.
  • the second terminal device in this embodiment of the present application may be in a connected state or a non-connected state.
  • the method 200 includes the following:
  • One or more second terminal devices send a first request message to the first terminal device, where the first request message is used to request to obtain M system information blocks (SIBs) or system information SI messages of the serving cell; correspondingly, the first request message
  • SIBs system information blocks
  • a terminal device receives the first request message sent by the one or more second terminal devices.
  • the remote UE may send a first request message to the relay UE to request to obtain the SI it needs.
  • the first request message can be used for M SI messages required by one or more remote UE requests, or the first request message can be used for one or more remote UE requests.
  • M SIBs the system message requested by each remote UE may be one or more SI messages in the M SI messages, or the system message requested by each remote UE may be one or more SIBs in the M SIBs, This embodiment of the present application does not limit it.
  • the first request message may pass radio resource control RRC signaling on the sidelink, or media access control (media access control, MAC)-control element (control element, CE), or pass Sidelink control information (SCI), or PC5-S signaling (PC5-S signaling) is sent.
  • RRC radio resource control
  • MAC media access control
  • CE control element
  • SCI pass Sidelink control information
  • PC5-S signaling PC5-S signaling
  • the remote UE can send a system message request to the relay UE through PC5-RRC signaling.
  • the first terminal device determines N target identities corresponding to the M SIBs or SI messages, where N is an integer greater than or equal to 1 and N ⁇ M.
  • an SL connection is established between the remote UE and the relay UE, and the SL can support broadcast, multicast, and unicast communication modes.
  • the three communication modes are mainly determined by the source identification in the access layer (access stotum, AS) (source layer-2 ID, SRC ID) and destination identification (destination layer-2 ID, DST ID), or called "source address” and "destination address”.
  • Table 2 is a simplified format of one possible message.
  • DST IDs can be assigned according to different communication methods such as broadcast, multicast, and unicast on the SL.
  • the DST ID can be set as a unicast, multicast or broadcast target identifier for receiving by the receiving end device.
  • the SRC ID is used to identify the identity (identity, ID) of the sending device.
  • the SRC ID can be assigned by the terminal device itself.
  • the SRC ID can be the device identifier of the relay UE, or the source L2ID used by the relay UE for unicast communication with the remote UE on the SL, or the source identifier specially allocated for system message multicast or broadcast, etc.
  • Frame type is used to identify the type of data frame.
  • the content of Frame Type can be used to indicate that the message content is a system message request.
  • the "target ID” can be understood as the DST ID in the message, or called “DST L2ID”.
  • the relay UE After the relay UE receives the first request message sent by one or more remote UEs, it can analyze the content of the first request message and accurately know the M SI messages required by all remote UEs, or all remote UEs. M SIBs, the relay UE then determines the corresponding different L2 IDs for M SI messages or M SIBs.
  • the first terminal device sends a second message to the one or more second terminal devices in a broadcast or multicast manner, where the second message includes the M SIB or SI messages, and the second message Include the corresponding target ID.
  • the second message may represent a message, for example, the second message is a broadcast message, that is, the broadcast message includes all M SIBs requested by the one or more second terminal devices or SI message.
  • the second message may also represent multiple messages, for example, the second message corresponds to multiple multicast messages, that is, the multiple multicast messages include all M SIB or SI message, and each multicast message may include one or several SIB or SI messages requested by the current second terminal device, and the SIB and SI contained in each multicast message belong to the same group, for example , SIB2 and SIB3 in Table 4, and for another example, SI message 1 and SI message 2 in Table 6.
  • the one or more second terminal devices receive the second message sent by the first terminal device in a broadcast or multicast manner.
  • the remote UE may use a discontinuous reception (DRX) reception mode to receive SI, and the listening timing is adapted to the transmission period of the relay UE, so as to achieve more energy saving.
  • DRX discontinuous reception
  • the M SIBs or SI messages sent described in the embodiment of this application can be understood as only broadcasting all the M SIBs requested by multiple second terminal devices to the multiple second terminal devices as a broadcast message. a second terminal device.
  • the M SIB or SI messages sent can be understood as the first terminal device directly broadcasts all the SI broadcast by the gNB to the multiple second terminal devices, in other words, the first terminal device sends the message to the second terminal device
  • the broadcast message may also include other SIB or SI messages.
  • the other SIB or SI messages may not be requested by the first request message, which is not limited in this embodiment of the present application.
  • the first terminal device may periodically send the M SIB or SI messages to the one or more second terminal devices, and correspondingly, the one or more second terminal devices may Periodically receive the M SIB or SI messages sent by the first terminal device in a broadcast or multicast manner.
  • the period may be a period agreed between the first terminal device and the second terminal device, and the period may be determined by the first terminal device, and sent to the second terminal through RRC messages on the sidelink, PC5-S signaling, etc.
  • the device indication is not limited in this embodiment of the application.
  • the M SIBs or SI messages may correspond to the same target identifier, and the target identifier instructs the first terminal device to send the M SIBs to one or more second terminal devices by broadcasting or SI messages.
  • all remote UEs connected under the relay UE can be assigned a broadcast identifier L2ID for broadcast transmission.
  • the relay UE will use the same broadcast identifier L2ID to send broadcast messages to all remote UEs, correspondingly , the remote UE will use the broadcast identifier L2ID to receive the broadcast message of the relay UE, and the broadcast message may include M SIBs or M SI messages requested by one or more remote UEs.
  • the target identifier may be a preset identifier.
  • the M SIBs or SI messages correspond to a broadcast identifier L2ID, and the broadcast identifier L2ID may be specified by a protocol.
  • the relay UE when the relay UE broadcasts system information including M SIBs or M SI messages, the system information carries a SRC ID and a DST ID, where the DST ID is the broadcast identifier L2ID specified in the above protocol. Since the broadcast identifier L2ID is pre-specified in the protocol, the remote UE and the relay UE can know that the L2ID is used to receive the broadcast of system information, so the relay UE does not need to inform the remote UE of the broadcast identifier L2ID. When the remote UE receives the broadcast message, it can receive system information including M SIBs or M SI messages according to the L2ID in the broadcast message.
  • the M SIB or SI messages correspond to the same target identifier, that is, the first terminal device sends the M SIB or SI messages to one or more second terminal devices in a broadcast manner
  • the The M SIB or SI messages also include the identifier of the first terminal device.
  • the remote UE may receive broadcast messages sent by multiple relay UEs around it.
  • the remote UE can also judge whether the broadcast message comes from the relay UE connected to it according to the SRC ID carried in the multiple broadcast messages received, that is, judge whether the broadcast message comes from the SRC ID in the message structure listed in Table 2.
  • the relay UE connected to itself.
  • remote UE 1 when remote UE 1 receives 5 broadcast messages sent by 5 relay UEs, remote UE 1 can obtain the SRC ID carried in each broadcast message.
  • the SRC ID is the device identifier of the relay UE connected to itself, Judging that the broadcast message is required by the remote UE 1, and analyzing the content of the broadcast message, and then obtaining the requested M SIB or SI messages.
  • the identifier of the above-mentioned first terminal device may be the device identifier of the relay UE, or the source L2ID used by the relay UE for unicast communication with the remote UE on the SL, or a source identifier specially allocated for system message multicast or broadcast, etc.
  • the embodiment of the application does not limit this.
  • the configuration of the broadcast identifier L2ID depends on the V2X service.
  • the broadcast identifier L2ID can be pre-configured by the application layer of the relay UE (such as the V2X layer), or can be Pre-configured by the V2X application server, or the packet control function (PCF) of the 5G core network can provide the mapping relationship between the V2X service type and the DST ID for the relay UE, and pre-configure different broadcast identifiers L2ID according to different service types , which is not limited in this embodiment of the present application.
  • PCF packet control function
  • the broadcast of the system message can be issued in the form of Uu information transfer (information transfer), that is, all AS messages on the base station side (such as paging messages, SI messages, etc.) are included in the Uu information transfer in the form of RRC containers In the RRC message, it is sent to the remote UE according to the allocated broadcast identifier L2ID.
  • Uu information transfer information transfer
  • AS messages on the base station side such as paging messages, SI messages, etc.
  • the RRC container containing the AS message is AS-RRC-message.
  • the relay UE After the relay UE receives the AS-RRC-message, it carries the AS-RRC-message in the UuInformationTransfer on the SL and sends it to the remote UE.
  • UuInformationTransfer may be a PC5-RRC message used to forward AS layer signaling on the SL.
  • PC5-RRC message used to forward AS layer signaling on the SL.
  • the relay UE may already have the system information requested by the remote UE, for example, the relay UE already has the M SIB or SI messages requested by the remote UE, then the relay UE can directly pass the broadcast message introduced above Send the system information including the M SIBs or SI messages to the remote UE in a manner.
  • the relay UE may not include the system information requested by the remote UE, for example, the relay UE does not have the M SIB or SI messages requested by the remote UE, then the relay UE can obtain the described information in the following two ways M SIB or SI messages. Then, before S230, the method 200 may also include steps corresponding to the following manner 1 and/or manner 2:
  • the first terminal device receives the M SIB or SI messages periodically broadcast by the network device.
  • the gNB may broadcast SI to the relay UE according to the configuration of the information element SI-SchedulingInfo in SIB1.
  • the relay UE determines the requested M SIBs or SI messages, waits for the SI broadcast by the gNB, and then executes S230 until the M SIBs or SI messages are obtained.
  • the relay UE does not need to occupy additional resources to request the network device to obtain the SI, which can reduce signaling overhead.
  • the first terminal device sends the first request message to the network device; correspondingly, the network device receives the first request message.
  • the network device sends the M SIB or SI messages to the first terminal device according to the first request message, and correspondingly, the first terminal device receives the M SIB or SI messages sent by the network device.
  • mode 1 and mode 2 can be used simultaneously or separately.
  • the remote UE requests SI message 1, SI message 2 and SI message 3 from the relay UE, and the relay UE receives the SI message 2 periodically broadcast by the gNB, and can only Then request SI message 1 and SI message 3 to the gNB, which is not limited in this embodiment of the present application.
  • the "first request message" in S220-2 and S220-3 may be the first request message in S210, that is, it is used to request the M SIBs or SI messages.
  • both the "first request message” in S220-2 and S220-3 and the first request message in S210 are used to request the M SIB or SI messages, but may have different message forms or message structures, etc., Specifically, it is determined according to the specific implementation between the first terminal device and the network device.
  • the "first request message” in S220-2 and S220-3 and the “first request message” in S210 are used to request different SIB or SI messages, for example, the "first request message” in S210 is used to request SI message 1, SI message 2, and SI message 3, the "first request message” in S220-2 and S220-3 is used to request SI message 1 and SI message 3, which is not limited in this embodiment of the present application.
  • the relay UE may send the first request message to the gNB, and the request content is the M SIB or SI messages requested by the remote UE, or part of the M SIB or SI messages (the remaining part is any SIB or SI message).
  • the gNB After receiving the first request message, the gNB sends the requested SIB or SI message to the relay UE.
  • S220-2 and S220-3 included in the second method can refer to the existing SI request process. It is simple and will not be repeated here.
  • the relay UE may send the requested M SIB or SI messages to the remote UE in the form of broadcast
  • other more remote UEs may receive the broadcast message even though they do not request it.
  • Many remote UEs can also receive the broadcast message, that is, directly receive M SIB or SI messages, and reserve them for subsequent use, etc., which is not limited in this embodiment of the present application.
  • the relay UE can send SI messages or SIBs to one or more remote UEs in the form of broadcast messages.
  • the relay UEs are prevented from communicating through unicast Occupy more SL resources to send system information to multiple remote UEs, thus saving communication resources.
  • the relay UE may also send an SI message or send an SIB to one or more remote UEs in a multicast manner.
  • the relay UE can determine different multicast identifiers for one or more remote UEs according to different rules or scenarios.
  • a predetermined period can be set for the relay UE, and within each predetermined period or each time the timer expires, the SI message or SIB requested by one or more remote UEs received before the timer expires is processed Grouping, no further details will be given later.
  • all the SIB or SI messages in the M SIB or SI messages correspond to the same target identifier, and the target identifier instructs the first terminal device to send the message to one or more second terminal devices in a multicast manner.
  • the M SIB or SI messages are configured to send the message to one or more second terminal devices in a multicast manner.
  • the relay UE can group all M SI messages into one group and assign a unique multicast identifier L2ID, that is, M SI messages correspond to one multicast identifier L2ID; or in other words, all M SIBs They are divided into one group and assigned a unique multicast identifier L2ID, that is, M SIBs correspond to one multicast identifier L2ID.
  • the multicast identifier L2ID may be allocated by the AS layer of the relay UE, or allocated by the V2X layer based on the service request of the AS layer, or selected by the AS layer from multiple L2IDs provided in advance by the V2X layer. The embodiment does not limit this.
  • Table 3 lists the multicast identifiers allocated in a possible multicast mode. As shown in Table 3, SI message 1, SI message 2 and SI message 3 all correspond to a multicast identifier L2ID 1, or SIB2-SIB7 All correspond to a multicast identifier L2ID 1.
  • the relay UE when the remote UE requests SI from the relay UE in an on-demand manner, the relay UE can send the SI to the remote UE through multicast, and the remote UE can send all the SI messages requested by the relay UE as A group, and assign a multicast identifier L2ID.
  • the relay UE may inform the remote UE of the multicast identifier L2ID, so that the remote UE uses the multicast identifier L2ID to receive SI.
  • the multicast identifier L2ID may be notified to the remote UE when the remote UE accesses the relay UE; or notified to the remote UE after the remote UE sends the first request to the relay UE.
  • each SIB or SI message in the M SIB or SI messages is regarded as a group, and each group corresponds to a different target identifier, and the target identifier instructs the first terminal device to send a message to a or multiple second terminal devices to send the M SIB or SI messages.
  • the relay UE may divide all M SI messages into M groups and assign a unique multicast identifier L2ID to each group, that is, M SI messages correspond to M multicast identifiers L2ID; All the M SIBs are divided into M groups and a unique multicast ID L2ID is assigned to each group, that is, M SIBs correspond to M multicast IDs L2ID.
  • the multicast identifier L2ID can be allocated by the AS layer of the relay UE, or allocated by the application layer (such as the V2X layer, etc.) based on the service request of the AS layer, or multiple L2IDs provided in advance by the AS layer at the application layer selected, which is not limited in this embodiment of the present application.
  • Table 4 lists the multicast identification assigned in a possible multicast mode. As shown in Table 4, SI message 1 (SIB2, SIB3) corresponds to a multicast identification L2ID 1, and SI message 2 (SIB4, SIB5) corresponds to A multicast identifier L2ID 2, SI message 3 (SIB6, SIB7) corresponds to a multicast identifier L2ID 3.
  • the relay UE when the remote UE requests SI from the relay UE in an on-demand manner, the relay UE can send the SI to the remote UE through multicast, and the remote UE can send the M SI messages requested by the relay UE as M groups, and assign a multicast identifier L2ID to each group.
  • the relay UE can inform the remote UE of the multicast identifier L2ID of each group, or inform the remote UE of the correspondence between the SI message and the multicast identifier, or inform the remote UE of the correspondence between the SIB and the multicast identifier, so that The remote UE uses the multicast identifier L2ID corresponding to each group of SI messages to receive SI.
  • the K SIBs or SI messages in the M SIBs or SI messages correspond to the same target identifier, 1 ⁇ K ⁇ M, and the target identifier indicates that the first terminal device broadcasts to One or more second terminal devices send the M SIB or SI messages.
  • the relay UE may divide all M SI messages into N groups and assign a unique multicast identifier L2ID to each group, that is, M SI messages correspond to N multicast identifiers L2ID; All the M SIBs are divided into N groups and a unique multicast ID L2ID is assigned to each group, that is, the M SIBs correspond to N multicast IDs L2ID.
  • Table 5 lists the multicast identification assigned in a possible multicast mode, as shown in Table 5, SI message 1 (SIB2, SIB3) and SI message 2 (SIB4, SIB5) correspond to a multicast identification L2ID 1, SI message 3 (SIB6, SIB7) corresponds to a multicast identifier L2ID 3.
  • the relay UE when the remote UE requests SI from the relay UE in an on-demand manner, the relay UE can send the SI to the remote UE through multicast, and the remote UE can send the M SI messages requested by the relay UE as N groups, and assign a multicast identifier L2ID to each group.
  • the relay UE can inform the remote UE of the multicast identifier L2ID corresponding to the currently requested SI message, or inform the remote UE of the correspondence between the SI message and the multicast identifier, or inform the remote UE of the correspondence between the SIB and the multicast identifier UE, so that the remote UE uses the multicast identifier L2ID corresponding to each group of SI messages to receive the requested SI.
  • the principle of grouping M SI messages or SIBs by the relay UE can be flexibly designed.
  • the relay UE can divide multiple remote UEs that request the same SIB into a group, thereby reducing the SL resources required by the relay UE to send the multicast message and the size of the multicast message.
  • the relay UE can also be grouped according to the content of the SI message.
  • all system messages related to sidelink configuration that is, SIB12, SIB13, and SIB14 in the 5G system
  • SIB12, SIB13, and SIB14 in the 5G system can be divided into a group, and corresponding L2IDs can be configured.
  • the base station can also perform grouping according to historical system message request information. For example, the base station can divide system messages that are usually requested together into a group according to historical information, and then inform the relay UE of the grouping information, and then the relay UE will Different groups are assigned L2IDs, and the base station can also assign L2IDs, and inform the relay UE of the correspondence between groups and L2IDs. Finally, the relay UE directly applies the mapping relationship configured by the base station.
  • the relay UE can also update the grouping method as needed. For example, according to the current or recent system message request status of the remote UE, the SIB messages or SI messages requested by the remote UE at the same time are divided into a group as much as possible, so that they can be grouped together at the same time.
  • a multicast message can be delivered to remote UEs. For example, remote UE1 requests SI message 1 and SI message 2, and remote UE2 requests SI message 2 and SI message 3, then SI message1, SI message2 and SI message3 can be divided into a group. If after a period of time, the relay UE finds that the remote UE no longer requests SI message 1 and SI message 2 or SI message 2 and SI message 3 at the same time, it will update the grouping and mapping relationship accordingly.
  • Table 6 lists the multicast identifier allocated in a possible multicast mode, as shown in Table 6, assuming that in the gNB configuration, the mapping relationship between SIB and SI message is: SIB2, SIB3 correspond to SI message1 , SIB4 and SIB5 correspond to SI message2, and SIB6 and SIB7 correspond to SI message3.
  • relay UE can divide SI message1 and SI message2 into one group, assign multicast ID L2ID1, assign SI message3 to another group, and assign multicast ID L2ID2.
  • the relay UE directly performs grouping in units of SIBs.
  • SI is sent in units of SI messages at the Uu port, it can be directly sent in units of SIBs at the PC5 port, so when grouping, it can be directly in units of SIBs are grouped for granularity.
  • relay UE can combine SIB2, SIB3, SIB4 is divided into a group and assigned a multicast identifier. In addition, it is no longer considered to map SIB4 and SIB5 in one SI message, but divide SIB4 and SIB5 into two groups, and assign multicast identifiers respectively.
  • Table 7 the grouping result of the relay UE can be shown in Table 7 below, which will not be repeated here.
  • the relay UE when the remote UE requests SI from the relay UE in an on-demand manner, the relay UE can send the SI to the remote UE through multicast, and the remote UE can obtain the M according to one or more remote UE requests.
  • a SI message, M SIBs, the number of remote UEs, etc., can be grouped flexibly, and a multicast identifier L2ID is assigned to each group.
  • the relay UE can inform the remote UE of the multicast identifier L2ID of each group, or inform the remote UE of the correspondence between the SI message and the multicast identifier, or inform the remote UE of the correspondence between the SIB and the multicast identifier, so that The remote UE uses the multicast identifier L2ID corresponding to each group of SI messages to receive SI, which improves the efficiency of sending and updating SI.
  • sending the M SIB or SI messages to the one or more second terminal devices by the first terminal device may be to periodically send the one or more second terminal devices to The M SIB or SI messages are sent in a multicast manner.
  • the M SIB or SI messages requested by the remote UE may be combined into one message, for example, combined into a new SI message, and send it to remote UE through multicast.
  • the relay UE may periodically multicast to the remote UE the M SIB or SI messages requested by the remote UE, where the multicast period may be configured by the relay UE, or configured by the gNB and sent to the relay UE, and Inform the remote UE by broadcasting, multicasting or unicasting.
  • the relay UE can only multicast the obtained SIB or SI messages requested by the remote UE.
  • the relay UE will continue to wait for the gNB to send them , and perform multicast in a subsequent period, which is not limited in this embodiment of the present application.
  • the multicast period of the relay UE can also refer to the period configuration in SIB1, for example, determine the multicast period in combination with the period in SI-SchedulingInfo.
  • the relay UE may reconfigure a multicast period and inform the remote UE of it. Or, it can also be configured according to the new timer.
  • the relay UE may also send the multicast message immediately after obtaining the first request message sent by the remote UE.
  • the relay UE may already have the system information requested by the remote UE, for example, the relay UE already has the M SIB or SI messages requested by the remote UE, then the relay UE can directly pass the broadcast message introduced above Send the system information including the M SIBs or SI messages to the remote UE in a manner.
  • the relay UE may not include the system information requested by the remote UE, for example, the relay UE does not have the M SIB or SI messages requested by the remote UE, then the relay UE can obtain the described information in the following two ways M SIB or SI messages. Then, before S230, the method 200 may also include S220-1 corresponding to the aforementioned method 1, and/or 220-2 and 220-3 corresponding to the second method. repeat.
  • the relay UE when the remote UE requests SI from the relay UE in an on-demand manner, the relay UE can send the SI to the remote UE through multicast, and the remote UE can send all the M SIs requested by the relay UE
  • the message is divided into N groups, and a multicast identifier L2ID is assigned to each group, so that the remote UE can use the different multicast identifier L2ID to receive SI messages of different groups.
  • the application layer will provide the information of the multicast ID, and the relay UE can convert the multicast ID into a DST ID; if the information of the multicast ID is not provided, the relay UE can use the service type in the broadcast mechanism To determine the mapping relationship to DST ID.
  • the first terminal device may send information about the first mapping relationship to the one or more second terminal devices, so that The first mapping relationship is used to indicate the corresponding relationship between the M SIB or SI messages and the N target identifiers.
  • the one or more second terminal devices receive the information about the first mapping relationship sent by the first terminal device, and receive the information about the first mapping relationship sent by the first terminal device according to the information about the first mapping relationship. M SIB or SI messages.
  • the first mapping relationship may be a correspondence between any SI message and a multicast identifier as listed in Table 3 to Table 5, or a correspondence between an SIB and a multicast identifier, which is not described here repeat.
  • the relay UE can directly send the first mapping relationship to the remote UE, or, when the remote UE receives the first request message sent by the relay UE, the relay UE The first mapping relationship can be directly sent to the remote UE, which is not limited in this embodiment of the present application.
  • the first terminal device when the first mapping relationship changes, the first terminal device sends updated information about the first mapping relationship to the second terminal device.
  • the relay UE may send the new remote UE (such as a third terminal device) the Information about the first mapping relationship.
  • the relay UE may directly update the information of the mapping relationship, the information of the mapping relationship update, or the mapping Send the information of relationship deletion to the remote UE, and instruct the remote UE to update, modify or delete the corresponding mapping relationship; or, the relay UE can directly send the modified information of the new first mapping relationship to the remote UE.
  • This application implements Examples are not limited to this.
  • the relay UE when the relay UE receives the SI change indication from the gNB, indicating that some system message content has changed, the relay UE receives the updated SI broadcast by the gNB, and then sends the updated SI to the remote UE through multicast or broadcast .
  • the first terminal device after the first terminal device determines the N target identifiers corresponding to the M SIB or SI messages, the first terminal device sends a message to the one or more second terminal devices Information about the target identifier corresponding to each SIB or SI message in the M SIBs or SI messages.
  • the one or more second terminal devices receive the target identifier information corresponding to each of the M SIB or SI messages sent by the first terminal device.
  • the relay UE may send target identification information to the remote UE through the PC5 interface.
  • the relay UE can use a default DST ID to establish a unicast connection with the remote UE, and the default DST ID is also associated with the service type. It should be understood that during the unicast communication process, the relay UE at both ends of the SL can also periodically update the L2ID with the remote UE to ensure communication security, which will not be repeated here.
  • the relay UE needs to reassign the multicast identifier L2ID according to the SI message or SIB re-requested by the remote UE.
  • the relay UE when the relay UE determines that the remote UE is currently requesting SI message 1, and the relay UE determines that the multicast identifier corresponding to SI message 1 is L2ID 1 , then the relay UE can send the multicast identifier L2ID 1 to the remote UE without sending the information of the first mapping relationship.
  • the relay UE sending the multicast identifier L2ID 1 to the remote UE may occur after sending the first request message, and the relay UE sending the remote UE sending the first mapping relationship may occur before or after sending the first request message, Or, when a new remote UE establishes a connection with the relay UE, the relay UE directly sends the information of the multicast identifier L2ID 1 or the first mapping relationship to the new remote UE through unicast.
  • the information of the multicast identifier L2ID 1 or the first mapping relationship may be carried to the remote UE in the discovery message, or may be transmitted through PC5-RRC signaling after the unicast connection is established. Not limited.
  • the remote UE may send a feedback message to the relay UE to tell the relay UE whether it has successfully received the M SIB or SI messages information. Then, in this scenario, the method 200 may also include:
  • One or more second terminal devices send a feedback message to the first terminal device, and correspondingly, the first terminal device receives the feedback message, where the feedback message is used to indicate whether the Second message.
  • the first terminal device may stop sending the M SIBs or SI messages.
  • the relay UEs confirm that all the remote UEs in one or more remote UEs have received the SI, they stop sending the multicast message or the broadcast message.
  • S250 may correspond to different implementation processes.
  • the first terminal device stops sending broadcast messages.
  • the first terminal device stops sending the multicast message.
  • the method 200 may not include the process of S250, for example, the number of times the first terminal device sends a broadcast message and the multicast message to the second terminal device is preset.
  • the relay UE may only send a multicast message or a broadcast message to one or more remote UEs three times, and then stop sending, which is not limited in this embodiment of the present application.
  • the relay UE when the SI changes, for example, the relay UE receives an indication of the SI change sent by the gNB through paging downlink control information (DCI), indicating that the corresponding relationship between the SI message and SIB1 changes , at this time, the relay UE does not need to update the target ID, and can continue to send multicast messages or broadcast messages with the previously allocated target ID.
  • DCI downlink control information
  • the relay UE can send an SI message or SIB to one or more remote UEs in the form of a multicast message.
  • the relay UE receives an SI request sent by one or more remote UEs, To request to obtain SI message or SIB, the relay UE can group all SI messages or SIBs into one group and assign a multicast identifier L2ID to the group, and send the multicast identifier L2ID to each remote UE through unicast.
  • the first mapping relationship is sent to each remote UE.
  • Subsequent relay UEs can send SI to the one or more remote UEs by sending a multicast message on the SL, which improves the efficiency of SI transmission.
  • the relay UE can also maintain information about the first mapping relationship between the multicast identifier L2ID and the SI message or SIB, and notify the relevant remote through unicast on the SL The UE further improves the transmission efficiency and update efficiency of the SI.
  • the relay UE can receive the first request message sent by the remote UE, but the relay UE only acts as a relay device, does not analyze the content of the first request message, and forwards the first request message to the gNB.
  • FIG. 3 is a schematic flowchart of another example of the method for transmitting system information SI provided in the embodiment of the present application.
  • the method 300 may be applied to the wireless communication system 100 including the first terminal equipment (relay UE), the second terminal equipment (remote UE) and the network equipment (base station), wherein the first terminal equipment (relay UE) ) and one or more second terminal equipment (remote UE) to establish a sidelink SL connection.
  • the method 300 includes the following:
  • One or more second terminal devices send a first request message to the first terminal device.
  • the first terminal device receives the first request message sent by the one or more second terminal devices, and sends the The first request message is sent to the network device.
  • the first request message is used to request to obtain M SIB or SI messages of the serving cell.
  • the remote UE in the connected state can directly send the first request message to the gNB through RRC signaling, because the relay UE performs the request through the radio link control (radio link control, RLC) layer below Relay, the RRC message is high-level signaling, so the relay UE cannot know the content of the first request message of the remote UE, that is, the relay UE cannot know the M SIBs or SI messages requested by the remote UE.
  • RLC radio link control
  • the gNB may forward the M SIBs or SI messages requested by the remote UE to the relay UE.
  • the relay UE obtains the requested M SIBs or SI messages in the following three ways:
  • the network device sends first indication information to the first terminal device, where the first indication information is used to indicate one or more second terminal devices sending the first request message and the requested M SIBs or SI messages.
  • the remote UE may directly send the first request message to the gNB through RRC signaling, and the gNB sends the first indication information to the relay UE corresponding to the remote UE according to the first request message, and the first indication information is used for Indicate the M SIB or SI messages, and which remote UE below the M SIB or SI messages are requested. Then the gNB can send the M SIB or SI messages to the relay UE through a separate message.
  • the first indication information includes the contents of multiple groups (remote UE ID—requested SIB or SI message).
  • the relay UE can clearly determine the SIB or SI message requested by each of the one or more remote UEs according to the content of the first indication information.
  • the SIB or SI message requested by each remote UE may be one or more of the M SIB or SI messages.
  • the ID of the remote UE may be the ID assigned by the remote UE itself, and told to the relay UE during the establishment of the unicast connection; or it may be the temporary ID information assigned by the relay UE to the remote UE, or it may be the ID of the remtoe UE
  • the cell temporary identifier (such as C-RNTI) is not limited in this embodiment of the present application.
  • the first terminal device determines the information of the one or more second terminal devices and the M SIB or SI messages according to the first indication information.
  • the network device sends the M SIB or SI messages to the first terminal device.
  • the network device sends first indication information to the first terminal device, where the first indication information is used to indicate one or more second terminal devices sending the first request message and the requested M SIBs or SI messages.
  • the first terminal device according to the first indication information, the information of the one or more second terminal devices, and the M SIB or SI messages.
  • the first terminal device monitors the M SIB or SI messages periodically broadcast by the network device.
  • mode 2 the difference between mode 2 and mode 1 is that after the gNB sends the first indication information to the relay UE corresponding to the remote UE, it no longer actively sends the M SIB or SI messages to the relay UE, but Continue to periodically broadcast SI to the relay UE until the relay UE obtains the M SIBs or SI messages, and then execute S320. This method can reduce signaling overhead.
  • the network device sends the M SIB or SI messages and first indication information to the first terminal device, where the first indication information is used to indicate one or more second terminals that send the first request message The device and the M SIB or SI messages requested.
  • the remote UE may directly send the first request message to the gNB through the RRC signaling, and the gNB sends the first request message to the relay UE corresponding to the remote UE through the RRC signaling according to the first request message, and at the same time
  • the first indication information will be carried, and the first indication information is used to indicate which remote UE below the M SIB or SI messages are requested.
  • the first indication information may be ID information of the remote UE, for example, 1-bit indication information.
  • the relay UE can know the M SIB or SI messages requested by one or more remote UEs. Carry out the process of following S320-S350 again:
  • the first terminal device sends the M SIB or SI messages to the one or more second terminal devices in a broadcast or multicast manner according to the N target identifiers.
  • the first terminal device sends a second message to the one or more second terminal devices in a broadcast or multicast manner, where the second message includes the M SIB or SI messages, and the second message Include the corresponding target ID.
  • the one or more second terminal devices receive the second message sent by the first terminal device in a broadcast or multicast manner.
  • One or more second terminal devices send a feedback message to the first terminal device, and correspondingly, the first terminal device receives the feedback message, where the feedback message is used to indicate whether the Second message.
  • the first terminal device may determine whether each of the second terminal devices has successfully received the requested SIB or SI message according to the feedback message.
  • one or more second terminal devices send a feedback message to the network device through the relay of the first terminal device, and the network device judges whether each second terminal device The M SIB or SI messages are successfully received.
  • the above method can provide more ways, so that the relay UE can obtain the SI request sent by one or more remote UEs, and determine the SI message or SIB requested by the one or more remote UEs, and the relay UE can combine the aforementioned methods,
  • the SI is sent to one or more remote UEs in a broadcast or multicast manner, which improves the sending efficiency of the SI.
  • FIG. 4 is a schematic block diagram of an example of an apparatus for transmitting system information SI provided by an embodiment of the present application.
  • the apparatus 400 may correspond to the first terminal equipment (relay UE) described in the above-mentioned methods 200 and 300, or may be applied to the first terminal equipment (relay UE).
  • the first terminal device establishes a sidelink SL connection with each second terminal device, and each second terminal device obtains network services of a target cell through the first terminal device, and the target cell is the serving cell of the first terminal device.
  • the communication device 400 may include: a communication unit 410 and a determination unit 420 .
  • the communication unit 410 is configured to receive a first request message sent by the one or more second terminal devices, where the first request message is used to request to acquire M system information blocks (SIBs) or system information SI messages of a serving cell.
  • SIBs system information blocks
  • the determining unit 420 is configured to determine N target identities corresponding to the M SIBs or SI messages, where N is an integer greater than or equal to 1 and N ⁇ M.
  • the communication unit 410 is further configured to send a second message to the one or more second terminal devices in a broadcast or multicast manner, where the second message includes the M SIB or SI messages, and the first Two messages include corresponding target identifications.
  • the determining unit 420 is further configured to determine that the M SIB or SI messages correspond to a same target identifier, and the target identifier indicates that the M SIB or SI messages are sent by broadcast.
  • the determining unit 420 is further configured to correspond to a different target identifier for each of the M SIB or SI messages, and the target identifier indicates that the M SIB or SI messages are sent in a multicast manner .
  • the determination unit 420 is further configured to determine that K SIBs or SI messages in the M SIBs or SI messages correspond to the same target identifier, 1 ⁇ K ⁇ M, and the target identifier indicates that the multicast method Send the M SIB or SI messages.
  • the target identifier is a preset identifier.
  • the second message when the M SIB or SI messages correspond to a same target identifier, the second message further includes the identifier of the first terminal device.
  • the communication unit 410 is further configured to send information about a first mapping relationship to the one or more second terminal devices, where the first mapping relationship is used to indicate that the M SIBs or Correspondence between the SI message and the N target identifiers.
  • the communication unit 410 is further configured to send updated information of the first mapping relationship to the second terminal device.
  • the communication unit 410 is further configured to send information about the first mapping relationship to the third terminal device.
  • the communication unit 410 is further configured to send the one or more second terminal devices sending the information of the target identifier corresponding to the second message, the target identifier is determined by the first terminal device according to the first mapping relationship, and the first mapping relationship is used to indicate the M SIB or SI messages and Correspondence among the N target identifiers.
  • the communication unit 410 before the communication unit 410 sends the M SIB or SI messages to the one or more second terminal devices, it is further configured to receive the M SIB or SI messages periodically broadcast by the network device. SIB or SI message.
  • the communication unit 410 is further configured to send the first request message to the network device, and receive the M SIB or SI messages sent by the network device.
  • the communication unit 410 is further specifically configured to periodically send the M SIB or SI messages to the one or more second terminal devices in a broadcast or multicast manner.
  • the first request message is sent through radio resource control RRC signaling or medium access control MAC CE signaling or sidelink control information SCI.
  • the communication unit 410 is further specifically configured to receive a feedback message sent by the one or more second terminal devices, where the feedback message is used to indicate whether the M SIBs or SI message; and when the determining unit 420 determines that each second terminal device has successfully received the M SIB or SI messages, the communication unit 410 stops sending the M SIB or SI messages.
  • the communication unit 410 is used to perform processes such as S210, S230, and S250 in the method 200, and the determining unit 420 is used to perform processes such as S220 in the method 200, or the communication unit 410 is used to perform the processes in the method 300 Processes such as S310, S330, and S350, the determination unit 420 is used to execute processes such as S320 in the method 300, and the specific processes for each unit to perform the above-mentioned corresponding steps have been described in detail in the methods 200 and 300, and are not repeated here for the sake of brevity. .
  • FIG. 5 is a schematic block diagram of another example of an apparatus for transmitting system information SI provided by an embodiment of the present application.
  • This apparatus 500 may correspond to (for example, be applicable to or be itself) the second terminal device described in the above-mentioned methods 200 and 300. (remote UE), and each module or unit in the apparatus 500 is respectively configured to execute each action or process performed by the second terminal device (remote UE) in the method 200 above, wherein the first terminal device and each Each second terminal device establishes a side link SL connection, and each second terminal device obtains network services of a target cell through the first terminal device, and the target cell is a serving cell of the first terminal device .
  • the communication device 500 may include: a communication unit 510 and a determination unit 520 .
  • the communication unit 510 is configured to send a first request message to the first terminal device, where the first request message is used to request acquisition of M system information blocks (SIBs) or system information SI messages of the serving cell.
  • SIBs system information blocks
  • the communication unit 510 is further configured to receive the second message sent by the first terminal device through broadcast or multicast, the second message includes the M SIB or SI messages, and the M SIB or The SI message corresponds to N target identifiers, and the second message includes the corresponding target identifiers, N is an integer greater than or equal to 1 and N ⁇ M.
  • the M SIB or SI messages correspond to a same target identifier, and the target identifier instructs the first terminal device to send the M SIB or SI messages in a broadcast manner.
  • each of the M SIB or SI messages corresponds to a different target identifier, and the target identifier instructs the first terminal device to send the M SIB or SI messages in a multicast manner.
  • the K SIB or SI messages in the M SIB or SI messages correspond to the same target identifier, 1 ⁇ K ⁇ M, and the target identifier instructs the first terminal device to send the M SIB or SI messages.
  • the target identifier is a preset identifier.
  • the M SIB or SI messages when the M SIB or SI messages correspond to the same target identifier, the M SIB or SI messages further include the identifier of the first terminal device, and the communication unit 510 It is further configured to receive the second message sent by the first terminal device and includes the identifier of the first terminal device; the determining unit 520 is further configured to acquire a corresponding SIB or SI message according to the second message.
  • the communication unit 510 is further configured to receive information about a first mapping relationship sent by the first terminal device, where the first mapping relationship is used to indicate the M SIB or SI messages and the The corresponding relationship between the N target identifiers.
  • the determining unit 520 is further configured to determine the target identifier for receiving the second message sent by the first terminal device according to the information of the first mapping relationship; the communication unit 510 is also configured to receive the The second message sent by the device that includes the target identifier; the determining unit 520 is further configured to acquire a corresponding SIB or SI message according to the second message.
  • the communication unit 510 is further configured to receive information about the updated first mapping relationship sent by the first terminal device; and/or when the third When the terminal device accesses the first terminal device, the one or more second terminal devices receive the updated first mapping relationship information sent by the first terminal device.
  • the communication unit 510 is further configured to receive information about a target identifier corresponding to each SIB or SI message in the second message sent by the first terminal device, where the target identifier is Determined by the first terminal device according to the first mapping relationship, where the first mapping relationship is used to indicate the correspondence between the M SIB or SI messages and the N target identifiers.
  • the communication unit 510 is further specifically configured to periodically receive the second message sent by the first terminal device in a broadcast or multicast manner.
  • the first request message is sent through radio resource control RRC signaling or medium access control MAC CE signaling or sidelink control information SCI.
  • the communication unit 510 is further configured to send a feedback message to the first terminal device, where the feedback message is used to indicate whether the M SIB or SI messages are successfully received; and when the When the determining unit 520 determines that the second message is successfully received, the communication unit 510 stops receiving the second message sent by the first terminal device.
  • the communication unit 510 is used to perform processes such as S210, S230, and S250 in the method 200, and the determination unit 520 is used to perform processes such as S240 in the method 200, or the communication unit 510 is used to perform the processes in the method 300 Processes such as S310, S330, and S350, the determination unit 520 is used to execute processes such as S340 in the method 300, and the specific processes for each unit to perform the above-mentioned corresponding steps have been described in detail in the methods 200 and 300, and for the sake of brevity, details are not repeated here .
  • FIG. 6 is a schematic block diagram of another example of an apparatus for transmitting system information SI provided by an embodiment of the present application.
  • the apparatus 600 may correspond to (for example, be applicable to or be) the network device (gNB) described in the above-mentioned methods 200 and 300. ), and each module or unit in the apparatus 600 is respectively used to execute the actions or processing procedures performed by the network equipment (gNB) in the above-mentioned methods 200 and 300, as shown in FIG. 6 , the communication apparatus 600 may include: communication Unit 610 and determination unit 620.
  • the determining unit 620 is used to execute processes such as S220-1 in the method 200
  • the communication unit 610 is used to execute the processes such as S220-2 and S220-3 in the method 200
  • the determining unit 620 is used to execute the processes of the method 300
  • the communication unit 610 is used to execute the processes of S320-1, S320-3, S320-4, and S320-7 in the method 300.
  • the specific process of each unit performing the above corresponding steps is in The methods 200 and 300 have been described in detail, and for the sake of brevity, details are not repeated here.
  • FIG. 7 is a schematic structural diagram of an example of a terminal device provided by an embodiment of the present application.
  • the terminal device 700 includes a processor 710 and a transceiver 720 .
  • the terminal device 700 further includes a memory 730 .
  • the processor 710, the transceiver 720, and the memory 730 communicate with each other through an internal connection path to transmit control and/or data signals, the memory 730 is used to store computer programs, and the processor 710 is used to call from the memory 730 And run the computer program to control the transceiver 720 to send and receive signals.
  • the processor 710 and the memory 730 may be combined into a processing device, and the processor 710 is used to execute the program code stored in the memory 730 to realize the functions of the first terminal device (relay UE) in the above method embodiment.
  • the memory 730 may also be integrated in the processor 710 , or be independent of the processor 710 .
  • the transceiver 720 may be implemented by means of a transceiver circuit.
  • the above-mentioned terminal device may further include an antenna 740 for sending the uplink data or uplink control signaling output by the transceiver 720 through wireless signals, or sending the received downlink data or downlink control signaling to the transceiver 720 for further processing.
  • the terminal device 700 may correspond to the first terminal device (relay UE) in the method 200 or 300 according to the embodiment of the present application, and the terminal device 700 may also be a chip applied to the first terminal device (relay UE) or components. Moreover, each module in the terminal device 700 implements the corresponding process in the method 200 or 300, and the specific process for each unit to perform the above corresponding steps has been described in detail in the method 200 or 300, and for the sake of brevity, details are not repeated here.
  • FIG. 8 is a schematic structural diagram of another example of a terminal device provided by an embodiment of the present application.
  • the terminal device 800 includes a processor 810 and a transceiver 820 .
  • the terminal device 800 further includes a memory 830 .
  • the processor 810, the transceiver 820, and the memory 830 communicate with each other through an internal connection path to transmit control and/or data signals, the memory 830 is used to store computer programs, and the processor 810 is used to call from the memory 830 And run the computer program to control the transceiver 820 to send and receive signals.
  • the processor 810 and the memory 830 may be combined into a processing device, and the processor 810 is used to execute the program code stored in the memory 830 to realize the functions of the second terminal equipment (remote UE) in the above method embodiment.
  • the memory 830 may also be integrated in the processor 810, or be independent of the processor 810.
  • the transceiver 820 may be implemented by means of a transceiver circuit.
  • the above-mentioned terminal device may further include an antenna 840 for sending the uplink data or uplink control signaling output by the transceiver 820 through wireless signals, or sending the received downlink data or downlink control signaling to the transceiver 820 for further processing.
  • the terminal device 800 may correspond to the second terminal device (remote UE) in the method 200 or 300 according to the embodiment of the present application, and the terminal device 800 may also be a chip applied to the second terminal device (remote UE) or components. Moreover, each module in the terminal device 800 implements the corresponding process in the method 200 or 300, and the specific process for each unit to perform the above corresponding steps has been described in detail in the method 200 or 300, and will not be described here for brevity.
  • FIG. 9 is a schematic structural diagram of an example of a network device provided by an embodiment of the present application.
  • the network device 900 (such as a base station) includes a processor 910 and a transceiver 920 .
  • the network device 900 further includes a memory 930 .
  • the processor 910, the transceiver 920, and the memory 930 communicate with each other through an internal connection path to transmit control and/or data signals, the memory 930 is used to store computer programs, and the processor 910 is used to call from the memory 930 And run the computer program to control the transceiver 920 to send and receive signals.
  • the foregoing processor 910 and memory 930 may be combined into a processing device, and the processor 910 is configured to execute program codes stored in the memory 930 to implement functions of the base station in the foregoing method embodiments.
  • the memory 930 may also be integrated in the processor 910 , or be independent of the processor 910 .
  • the transceiver 920 may be implemented by means of a transceiver circuit.
  • the above-mentioned network device may also include an antenna 940, configured to send the downlink data or downlink control signaling output by the transceiver 920 through wireless signals, or send the received uplink data or uplink control signaling to the transceiver 820 for further processing.
  • an antenna 940 configured to send the downlink data or downlink control signaling output by the transceiver 920 through wireless signals, or send the received uplink data or uplink control signaling to the transceiver 820 for further processing.
  • the apparatus 900 may correspond to the base station in the methods 200 and 300 according to the embodiments of the present application, and the apparatus 900 may also be a chip or a component applied to a base station. Moreover, each module in the device 900 implements the corresponding processes in 200 and 300, and the specific process for each unit to perform the above corresponding steps has been described in detail in the methods 200 and 300, and for the sake of brevity, details are not repeated here.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative, and the division of the units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be combined.
  • the mutual coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices or units.
  • each functional unit in each embodiment of the present application may be integrated into one physical entity, or each unit may correspond to one physical entity, or two or more units may be integrated into one physical entity.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

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Abstract

本申请提供了一种传输系统信息SI的方法和装置，该方法应用于包括第一终端设备和一个或多个第二终端设备的系统中，第一终端设备和每个第二终端设备建立侧行链路SL连接，该方法包括：第一终端设备接收一个或多个第二终端设备发送的第一请求消息，第一请求消息用于请求获取服务小区的M个系统信息块SIB或系统信息SI消息；第一终端设备确定M个SIB或SI消息对应的N个目标标识，N为大于或等于1的整数且N≤M；第一终端设备根据N个目标标识通过广播或组播的方式向一个或多个第二终端设备发送M个SIB或SI消息。该方法可以在SL上通过组播或广播的方式传输SI，提升了SI的传输效率和更新效率。

Description

一种传输系统信息SI的方法和装置
本申请要求于2021年05月09日提交国家知识产权局、申请号为202110504160.X、申请名称为“一种传输系统信息SI的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及通信领域中一种传输系统信息SI的方法和装置。
背景技术
为了提高小区的覆盖，引入了终端设备到网络设备的中继技术，即“UE-to-Network relay”的通信系统，该通信系统可以包括无线接入设备、远端设备(remote user equipment，remote UE)以及中继设备(relay UE)等。其中，relay UE和无线接入设备之间建立通信连接，remote UE和relay UE之间建立侧行链路(sidelink，SL)连接，且remote UE可以通过relay UE和无线接入设备建立连接，获取网络服务。relay UE和无线接入设备之间可以通过Uu接口进行通信，remote UE和relay UE之间通过PC5接口进行通信。
示例性的，以基站作为无线接入设备，基站可以向relay UE广播系统信息(system information，SI)，remote UE如何从relay UE获取SI是当前需要解决的问题。
一种可能的实现方式中，remote UE可以通过PC5接口的无线资源控制(PC5radio resource control，PC5-RRC)消息或PC5-S信令(PC5-S signling,PC5-S)向relay UE请求获取SI，即“on-demand SI”的方式，再由relay UE向基站请求SI，relay UE得到基站广播的SI后，将SI通过SL上的单播通信发送给remote UE。
当一个relay UE连接了多个remote UE，多个remote UE向relay UE请求相同的SI时，每个remote UE都需要通过PC5-RRC消息向relay UE请求该SI，然后relay UE需要将同样的SI在SL上，通过单播通信的方式发送给每一个remote UE。该SI的传输过程需要为relay UE和每个remote UE的单播通信分配sidelink资源，这可能会占用较多的SL资源，造成SL资源浪费，且传输效率低下。因此，relay UE如何向remote UE转发SI，是当前亟需解决的问题。
发明内容
本申请提供了一种传输系统信息SI的方法和装置，该方法可以在SL上通过组播或广播的方式传输SI，提升了SI的传输效率和更新效率。
第一方面，提供了一种传输信息的方法，其特征在于，所述方法应用于包括第一终端设备和一个或多个第二终端设备的系统中，所述第一终端设备和每个第二终端设备建立侧行链路SL连接，且所述每个第二终端设备通过所述第一终端设备获取目标小区的网络服务，所述目标小区是所述第一终端设备的服务小区，所述方法包括：
所述第一终端设备接收所述一个或多个第二终端设备发送的第一请求消息，所述第一请求消息用于请求获取所述目标小区的M个系统信息块SIB或系统信息SI消息；
所述第一终端设备确定所述M个SIB或SI消息对应的N个目标标识，N为大于或等 于1的整数且N≤M；
所述第一终端设备通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息，所述第二消息包括所述M个SIB或SI消息，且所述第二消息包括对应的目标标识。
应理解，remote UE可以向relay UE发送第一请求消息，用于请求获取自己所需要的系统信息。具体地，该第一请求消息可以用于一个或多个remote UE请求所需要的M个SI message，或者该第一请求消息可以用于一个或多个remote UE请求所需要的M个SIB，每个remote UE请求的系统消息可以是M个SI message中的一个或多个SI message，或者每个remote UE请求的系统消息可以是M个SIB中的一个或者多个SIB，本申请实施例对此不作限定。
可选地，所述第二消息可以代表一个消息，例如第二消息是一个广播消息，即广播消息中包括所述一个或多个第二终端设备请求的所有的M个SIB或SI message。
或者，所述第二消息还可以代表多个消息，例如所述第二消息对应多个组播消息，即多个组播消息中包括所述一个或多个第二终端设备请求的所有的M个SIB或SI message，且每一个组播消息可能包括当前的第二终端设备请求的某个或者某几个SIB或SI message，每个组播消息中包含的SIB和SI同属于一个分组。
在本申请的相关描述中，“发送所述第二消息”和“发送M个SIB或SI message”表达相同的含义，即第一终端设备通过发送一个或多个消息的方式向所述一个或多个第二终端设备发送所请求的SIB或SI message。应理解，不论是第二消息作为一个消息，或者对应多个独立的不同消息，均落入本申请实施例的保护范围，后续不再赘述。
综上所述，通过本申请提供的方法，relay UE可以以组播消息的方式或广播消息的方式向一个或多个remote UE发送的SI message或者发送SIB。示例性的，当relay UE以广播消息的方式向一个或多个remote UE发送的SI message或者发送SIB时，避免了relay UE通过单播通信占用更多的SL资源向多个remote UE发送系统信息，从而节省通信资源。
或者，当relay UE接收到一个或多个remote UE发送的SI请求，请求获取SI message或SIB，relay UE可以将所有的SI message或SIB归为一组并为该组分配组播标识L2ID，并通过单播的方式将此组播标识L2ID发送给每一个remote UE。或者，将所有的SI message或SIB归为多个组(例如N组)并为每一组分配一个组播标识L2ID，并通过单播的方式将此组播标识L2ID和SI message或SIB之间的第一映射关系发送给每一个remote UE。后续relay UE可以通过在SL上发送组播消息的方式向该一个或多个remote UE发送SI，提升了SI的发送效率。此外，当组播标识发生变化或SI发生变化时，relay UE还可以维护组播标识L2ID和SI message或SIB之间的第一映射关系的信息，在SL上通过单播的方式通知相关的remote UE，进一步提升了SI的发送效率和更新效率。
一种可能的实现方式中，第一请求消息可以通过侧行链路上的无线资源控制RRC信令，或媒体访问控制(media access control，MAC)-控制元素(control element，CE)，或通过侧行链路控制信息(sidelink control information，SCI)，或PC5-S信令(PC5-S signaling)发送。例如，remote UE可以通过PC5-RRC信令给relay UE发送系统消息请求。
结合第一方面，在某些可能的实现方式中，所述第一终端设备确定所述M个SIB或SI消息对应的N个目标标识，包括：
所述第一终端设备确定所述M个SIB或SI消息对应一个相同的目标标识，所述目标 标识指示通过广播方式发送所述M个SIB或SI消息；或者
所述第一终端设备确定所述M个SIB或SI消息中的每一个SIB或SI消息对应不同的目标标识，所述目标标识指示通过组播方式发送所述M个SIB或SI消息；或者
所述第一终端设备确定所述M个SIB或SI消息中的K个SIB或SI消息对应一个相同的目标标识，1≤K<M，所述目标标识指示通过组播方式发送所述M个SIB或SI消息。
对于组播来说，应用层会提供该组播标识的信息，relay UE可以将该组播标识转换成DST ID；如果未提供该组播标识的信息，则relay UE可以使用广播机制中业务类型到DST ID的映射关系来进行确定。
通过上述方式，当remote UE以on-demand的方式向relay UE请求获取SI时，relay UE可以通过组播方式向remote UE下发SI，其中remote UE可以将relay UE请求获取的所有的M个SI message划分为N组，并为每一组分配一个组播标识L2ID，以便remote UE使用该不同的组播标识L2ID接收不同组的SI message。
可选地，还可以由基站根据历史系统消息请求信息进行分组，例如，基站可以根据历史信息将通常一起请求的系统消息划分为一个组，再将分组信息告知给relay UE，再由relay UE为不同的分组分配L2ID，也可以由基站分配L2ID，并将分组和L2ID的对应关系告知给relay UE，最后，relay UE直接应用该基站配置的映射关系。
另外，relay UE还可以按需更新分组方式，例如根据当前或者最近一段时间内的remote UE的系统消息请求情况，将remote UE同时请求的SIB消息或者SI消息尽量划分为一个组，以便于在同一个组播消息中能够下发给remote UE。例如，remote UE1请求了SI message 1和SI message 2，remote UE2请求了SI message 2和SI message 3，则可以将SI message1、SI message2和SI message3划分为一个组。若是过了一段时间，relay UE发现remote UE不再同时请求SI message 1和SI message 2或者SI message 2和SI message 3，则将分组以及映射关系进行相应更新。
结合第一方面和上述实现方式，在某些可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述目标标识是预设的标识。
结合第一方面和上述实现方式，在某些可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述第二消息还包括所述第一终端设备的标识。
示例性的，可以为relay UE下连接的所有remote UE分配用于广播发送的广播标识L2ID，在该方式中，relay UE将应用该相同的广播标识L2ID向所有的remote UE发送广播消息，相应地，remote UE将应用该广播标识L2ID来接收relay UE的广播消息，该广播消息可以包括一个或多个remote UE请求的M个SIB或M个SI message。
通过上述实现方式，relay UE可以以广播消息的方式向一个或多个remote UE发送的SI message或者发送SIB，当多个remote UE向relay UE请求获取系统信息时，避免了relay UE通过单播通信占用更多的SL资源向多个remote UE发送系统信息，从而节省通信资源。
结合第一方面和上述实现方式，在某些可能的实现方式中，所述方法还包括：
所述第一终端设备向所述一个或多个第二终端设备发送第一映射关系的信息，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
结合第一方面和上述实现方式，在某些可能的实现方式中，所述方法还包括：
当所述第一映射关系变化时，所述第一终端设备向所述第二终端设备发送更新后的第 一映射关系的信息；和/或
当第三终端设备接入所述第一终端设备时，所述第一终端设备向所述第三终端设备发送所述第一映射关系的信息。
可选地，当remote UE和relay UE建立连接的时候，relay UE就可以直接将第一映射关系发送给remote UE，或者，当remote UE接收到relay UE发送的第一请求消息的时候，relay UE就可以直接将第一映射关系发送给remote UE，本申请实施例对此不作限定。
或者，一种可能的情况中，当所述第一映射关系变化时，所述第一终端设备向所述第二终端设备发送更新后的第一映射关系的信息。
又或者，另一种可能的情况中，当有新的remote UE(例如第三终端设备)接入所述该relay UE时，relay UE可以向新的remote UE(例如第三终端设备)发送所述第一映射关系的信息。
结合第一方面和上述实现方式，在某些可能的实现方式中，所述第一终端设备确定所述M个SIB或SI消息对应的N个目标标识之后，所述方法还包括：所述第一终端设备向所述一个或多个第二终端设备发送所述第二消息对应的目标标识的信息，所述目标标识是所述第一终端设备根据第一映射关系确定的，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
通过上述方式，当remote UE以on-demand的方式向relay UE请求获取SI时，relay UE可以通过组播方式向remote UE下发SI，其中remote UE可以将relay UE请求获取的M个SI message为N组，并为每一个组分配一个组播标识L2ID。relay UE可以将当前请求的SI message对应的该组播标识L2ID告知remote UE，或者将SI message和组播标识之间的对应关系告知remote UE，或者SIB和组播标识之间的对应关系告知remote UE，以便remote UE使用每一组SI message对应的组播标识L2ID进行所请求的SI的接收。
结合第一方面和上述实现方式，在某些可能的实现方式中，所述第一终端设备通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息之前，所述方法还包括：所述第一终端设备接收网络设备周期性广播的所述M个SIB或SI消息；和/或所述第一终端设备向所述网络设备发送所述第一请求消息；所述第一终端设备接收所述网络设备发送的所述M个SIB或SI消息。
结合第一方面和上述实现方式，在某些可能的实现方式中，所述第一终端设备通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息，包括：
所述第一终端设备周期性地向所述一个或多个第二终端设备发送所述第二消息。
可选地，relay UE的组播周期还可以参考SIB1中的周期配置，例如结合SI-SchedulingInfo中的周期确定该组播周期。或者，也可以由relay UE重新配置一个组播周期并将其告诉remote UE。又或者，也可以根据新的timer进行配置。
结合第一方面和上述实现方式，在某些可能的实现方式中，所述第一请求消息通过无线资源控制RRC信令或媒体访问控制MAC CE信令或侧行链路控制信息SCI发送的。
结合第一方面和上述实现方式，在某些可能的实现方式中，所述方法还包括：所述第一终端设备接收所述一个或多个第二终端设备发送的反馈消息，所述反馈消息用于指示是否成功接收所述第二消息；所述第一终端设备停止发送所述第二消息。
应理解，对于广播和组播的不同方式，发送反馈消息的过程可以对应的不同的实现过 程。
一种可能的实现方式中，如果第一终端设备通过广播消息的方式向一个或多个第二终端设备发送所述第二消息时，当第一终端设备接收到一个或多个第二终端设备中所有的第二终端设备的反馈消息，并根据该反馈消息确定一个或多个第二终端设备中所有的第二终端设备都成功地接收了所述第二消息时，第一终端设备停止发送广播消息。
另一种可能的实现方式中，如果第一终端设备通过组播消息的方式向一个或多个第二终端设备发送所述第二消息时，因为不同的分组发送的是不同的组播消息(例如N个分组发送的是N个不同的组播消息)，那么当第一终端设备接收到每个分组对应发送过第一请求消息的所有第二终端设备的反馈消息，并根据该反馈消息确定该每个分组对应发送过第一请求消息的所有第二终端设备都成功地接收了所述第二消息时，第一终端设备停止发送组播消息。
可选地，该方法可以预先设定第一终端设备向第二终端设备发送广播消息和组播消息的次数等。示例性的，relay UE可以仅向一个或多个remote UE发送3次组播消息或广播消息，之后就停止发送，本申请实施例对此不作限定。
第二方面，提供了一种传输信息的方法，其特征在于，所述方法应用于包括第一终端设备和一个或多个第二终端设备的系统中，所述第一终端设备和每个第二终端设备建立侧行链路SL连接，且所述每个第二终端设备通过所述第一终端设备获取目标小区的网络服务，所述目标小区是所述第一终端设备的服务小区，所述方法包括：
所述一个或多个第二终端设备向所述第一终端设备发送第一请求消息，所述第一请求消息用于请求获取所述目标小区的M个系统信息块SIB或系统信息SI消息；
所述一个或多个第二终端设备接收所述第一终端设备通过广播或组播的方式发送的所述第二消息，所述第二消息包括所述M个SIB或SI消息，所述M个SIB或SI消息对应N个目标标识，且所述第二消息包括对应的目标标识，N为大于或等于1的整数且N≤M。
结合第二方面，在某些可能的实现方式中，所述M个SIB或SI消息对应一个相同的目标标识，所述目标标识指示所述第一终端设备通过广播方式发送所述M个SIB或SI消息；或者
所述M个SIB或SI消息中的每一个SIB或SI消息对应不同的目标标识，所述目标标识指示所述第一终端设备通过组播方式发送所述M个SIB或SI消息；或者
所述M个SIB或SI消息中的K个SIB或SI消息对应一个相同的目标标识，1≤K<M，所述目标标识指示所述第一终端设备通过组播方式发送所述M个SIB或SI消息。
结合第二方面和上述实现方式，在某些可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述目标标识是预设的标识。
结合第二方面和上述实现方式，在某些可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述第二消息还包括所述第一终端设备的标识，以及所述方法还包括：
所述一个或多个第二终端设备接收所述第一终端设备发送的包括所述第一终端设备的标识的所述第二消息；
根据所述第二消息，获取对应的SIB或SI消息。
结合第二方面和上述实现方式，在某些可能的实现方式中，所述方法还包括：
所述一个或多个第二终端设备接收所述第一终端设备发送的第一映射关系的信息，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系；
所述一个或多个第二终端设备根据所述第一映射关系的信息，确定接收所述第一终端设备发送的所述第二消息的目标标识；
所述一个或多个第二终端设备接收所述第一终端设备发送的包括所述目标标识的所述第二消息；
根据所述第二消息，获取对应的SIB或SI消息。
结合第二方面和上述实现方式，在某些可能的实现方式中，所述方法还包括：当所述第一映射关系变化时，所述一个或多个第二终端设备接收所述第一终端设备发送的更新后的第一映射关系的信息；和/或当第三终端设备接入所述第一终端设备时，所述第一终端设备向所述第三终端设备发送所述第一映射关系的信息。
结合第二方面和上述实现方式，在某些可能的实现方式中，所述方法还包括：所述一个或多个第二终端设备接收所述第一终端设备发送的所述第二消息对应的目标标识的信息，所述目标标识是所述第一终端设备根据第一映射关系确定的，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
结合第二方面和上述实现方式，在某些可能的实现方式中，所述一个或多个第二终端设备接收所述第一终端设备通过广播或组播的方式发送的所述M个SIB或SI消息，包括：所述一个或多个第二终端设备周期性地接收所述第一终端设备通过广播或组播的方式发送的所述M个SIB或SI消息。
结合第二方面和上述实现方式，在某些可能的实现方式中，所述第一请求消息通过无线资源控制RRC信令或媒体访问控制MAC CE信令或侧行链路控制信息SCI发送的。
结合第二方面和上述实现方式，在某些可能的实现方式中，所述方法还包括：所述一个或多个第二终端设备向所述第一终端设备发送反馈消息，所述反馈消息用于指示是否成功接收所述第二消息；所述一个或多个第二终端设备停止接收所述第一终端设备发送的所述第二消息。
第三方面，提供了一种传输信息的装置，其特征在于，所述装置和一个或多个第二终端设备中的每个第二终端设备建立侧行链路SL连接，且所述每个第二终端设备通过所述装置获取目标小区的网络服务，所述目标小区是所述装置的服务小区，所述装置包括：
通信单元，用于接收所述一个或多个第二终端设备发送的第一请求消息，所述第一请求消息用于请求获取所述目标小区的M个系统信息块SIB或系统信息SI消息；
确定单元，用于确定所述M个SIB或SI消息对应的N个目标标识，N为大于或等于1的整数且N≤M；
所述通信单元，还用于通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息，所述第二消息包括所述M个SIB或SI消息，且所述第二消息包括对应的目标标识。
结合第三方面，在某些可能的实现方式中，所述确定单元还用于确定所述M个SIB或SI消息对应一个相同的目标标识，所述目标标识指示通过广播方式发送所述M个SIB或SI消息；或者
所述确定单元还用于确定所述M个SIB或SI消息中的每一个SIB或SI消息对应不 同的目标标识，所述目标标识指示通过组播方式发送所述M个SIB或SI消息；或者
所述确定单元还用于确定所述M个SIB或SI消息中的K个SIB或SI消息对应一个相同的目标标识，1≤K<M，所述目标标识指示通过组播方式发送所述M个SIB或SI消息。
结合第三方面和上述实现方式，在某些可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述目标标识是预设的标识。
结合第三方面和上述实现方式，在某些可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述第二消息还包括所述装置的设备标识。
结合第三方面和上述实现方式，在某些可能的实现方式中，所述确通信单元还用于向所述一个或多个第二终端设备发送第一映射关系的信息，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
结合第三方面和上述实现方式，在某些可能的实现方式中，当所述第一映射关系变化时，所述通信单元还用于向所述第二终端设备发送更新后的第一映射关系的信息；和/或
当第三终端设备接入所述装置时，所述通信单元还用于向所述第三终端设备发送所述第一映射关系的信息。
结合第三方面和上述实现方式，在某些可能的实现方式中，所述确定单元确定所述M个SIB或SI消息对应的N个目标标识之后，所述通信单元还用于向所述一个或多个第二终端设备发送所述第二消息对应的目标标识的信息，所述目标标识是所述装置根据第一映射关系确定的，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
结合第三方面和上述实现方式，在某些可能的实现方式中，所述通信单元通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息之前，还用于接收网络设备周期性广播的所述M个SIB或SI消息；和/或，所述通信单元还用于：
向所述网络设备发送所述第一请求消息；
接收所述网络设备发送的所述M个SIB或SI消息。
结合第三方面和上述实现方式，在某些可能的实现方式中，所述通信单元还用于周期性地向所述一个或多个第二终端设备发送所述第二消息。
结合第三方面和上述实现方式，在某些可能的实现方式中，所述第一请求消息通过无线资源控制RRC信令或媒体访问控制MAC CE信令或侧行链路控制信息SCI发送的。
结合第三方面和上述实现方式，在某些可能的实现方式中，所述通信单元还用于接收所述一个或多个第二终端设备发送的反馈消息，所述反馈消息用于指示是否成功接收所述第二消息；
所述确定单元还用于停止发送所述第二消息。
第四方面，提供了一种传输信息的装置，其特征在于，一个或多个装置中的每个所述装置和第一终端设备建立侧行链路SL连接，且每个所述装置通过所述第一终端设备获取目标小区的网络服务，所述目标小区是所述第一终端设备的服务小区，所述装置包括：
通信单元，用于向所述第一终端设备发送第一请求消息，所述第一请求消息用于请求获取所述目标小区的M个系统信息块SIB或系统信息SI消息；
所述通信单元，还用于接收所述第一终端设备通过广播或组播的方式发送的所述第二消息，所述第二消息包括所述M个SIB或SI消息，所述M个SIB或SI消息对应N个目 标标识，且所述第二消息包括对应的目标标识，N为大于或等于1的整数且N≤M。
结合第四方面，在某些可能的实现方式中，所述M个SIB或SI消息对应一个相同的目标标识，所述目标标识指示所述第一终端设备通过广播方式发送所述M个SIB或SI消息；或者
所述M个SIB或SI消息中的每一个SIB或SI消息对应不同的目标标识，所述目标标识指示所述第一终端设备通过组播方式发送所述M个SIB或SI消息；或者
所述M个SIB或SI消息中的K个SIB或SI消息对应一个相同的目标标识，1≤K<M，所述目标标识指示所述第一终端设备通过组播方式发送所述M个SIB或SI消息。
结合第四方面和上述实现方式，在某些可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述目标标识是预设的标识。
结合第四方面和上述实现方式，在某些可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述第二消息还包括所述第一终端设备的标识，以及所述通信单元还用于接收所述第一终端设备发送的包括所述第一终端设备的标识的所述第二消息；
所述确定单元还用于根据所述第二消息，获取对应的SIB或SI消息。
结合第四方面和上述实现方式，在某些可能的实现方式中，所述通信单元还用于接收所述第一终端设备发送的第一映射关系的信息，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系；
所述确定单元还用于根据所述第一映射关系的信息，确定接收所述第一终端设备发送的所述第二消息的目标标识；
所述通信单元还用于接收所述第一终端设备发送的包括所述目标标识的所述第二消息；
所述确定单元还用于根据所述第二消息，获取对应的SIB或SI消息。
结合第四方面和上述实现方式，在某些可能的实现方式中，当所述第一映射关系变化时，所述通信单元还用于接收所述第一终端设备发送的更新后的第一映射关系的信息；和/或当第三终端设备接入所述第一终端设备时，所述通信单元还用于向所述第三终端设备发送所述第一映射关系的信息。
结合第四方面和上述实现方式，在某些可能的实现方式中，所述通信单元还用于接收所述第一终端设备发送的所述第二消息对应的目标标识的信息，所述目标标识是所述第一终端设备根据第一映射关系确定的，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
结合第四方面和上述实现方式，在某些可能的实现方式中，所述通信单元还用于接收所述第一终端设备通过广播或组播的方式发送的所述M个SIB或SI消息，包括：
所述通信单元还用于周期性地接收所述第一终端设备通过广播或组播的方式发送的所述M个SIB或SI消息。
结合第四方面和上述实现方式，在某些可能的实现方式中，所述第一请求消息通过无线资源控制RRC信令或媒体访问控制MAC CE信令或侧行链路控制信息SCI发送的。
结合第四方面和上述实现方式，在某些可能的实现方式中，所述通信单元还用于向所述第一终端设备发送反馈消息，所述反馈消息用于指示每一个所述装置是否成功接收所述 第二消息；
所述确定单元还用于停止接收所述第一终端设备发送的所述第二消息。
第五方面，提供了一种装置，该通信装置具有实现上述第一方面的方法设计中的第一终端设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第六方面，提供了一种装置，该通信装置具有实现上述第二方面的方法设计中的第二终端设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第七方面，提供一种终端设备，包括收发器和处理器。可选地，该终端设备还包括存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该终端设备执行上述第一方面或第一方面任意一种可能的实现方式中的方法，或者使得该终端设备执行上述第二方面或第二方面任意一种可能的实现方式中的方法。
第八方面，提供一种网络设备，包括收发器和处理器。可选地，该网络设备还包括存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该网络设备执行上述第一方面或第二方面中任意一种可能的实现方式中网络设备所执行的步骤。
第九方面，提供了一种通信系统，该系统包括上述第三方面的第一终端设备以及第四方面的第二终端设备；或者，该系统还可以包括上述第八方面的网络设备。
第十方面，提供一种通信装置，该通信装置可以为上述方法设计中的终端设备，或者为设置在终端设备中的芯片。该通信装置包括：处理器，与存储器耦合，可用于执行存储器中的指令，以实现上述第一方面或第一方面任意一种可能的实现方式中第一终端设备所执行的方法，或者以实现上述第二方面或第二方面任意一种可能的实现方式中第二终端设备所执行的方法。可选地，该通信装置还包括存储器。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。
当该通信装置为终端设备时，该通信接口可以是收发器，或，输入/输出接口。
当该通信装置为配置于终端设备中的芯片时，该通信接口可以是输入/输出接口。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第十一方面，提供了一种通信装置，该通信装置可以为上述方法设计中的网络设备，或者为设置在网络设备中的芯片。该通信装置包括：处理器，与存储器耦合，可用于执行存储器中的指令，以实现上述第一方面或第二方面任意一种可能的实现方式中网络设备所执行的方法。可选地，该通信装置还包括存储器。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。
当该通信装置为网络设备时，该通信接口可以是收发器，或，输入/输出接口。
当该通信装置为配置于网络设备中的芯片时，该通信接口可以是输入/输出接口。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第十二方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
第十三方面，提供了一种计算机可读介质，所述计算机可读介质存储有程序代码，当 所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
附图说明
图1是适用于本申请实施例的移动通信系统的架构示意图。
图2是本申请实施例提供的一例传输系统信息SI的方法的示意性流程图。
图3是本申请实施例还提供的另一例传输系统信息SI的方法的示意性流程图。
图4是本申请实施例提供的一例传输系统信息SI的装置的示意性框图。
图5是本申请实施例提供的另一例传输系统信息SI的装置的示意性框图。
图6是本申请实施例提供的另一例传输系统信息SI的装置的示意性框图。
图7是本申请实施例提供的一例终端设备的结构示意图。
图8是本申请实施例提供的另一例终端设备的结构示意图。
图9是本申请实施例提供的一例网络设备的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
应理解，本申请实施例中的方式、情况、类别以及实施例的划分仅是为了描述的方便，不应构成特别的限定，各种方式、类别、情况以及实施例中的特征在不矛盾的情况下可以相结合。
还应理解，本申请实施例中的“第一”、“第二”以及“第三”仅为了区分，不应对本申请构成任何限定。例如，本申请实施例中的“第一终端设备”、“第二终端设备”和“第三终端设备”等，表示移动通信系统中的不同终端设备。
还应理解，在本申请的各种实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
还需要说明的是，本申请实施例中，“预设”、“预先定义”可以通过在设备(例如，包括终端设备和网络设备等)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定，例如本申请实施例中预设标识等。
还需要说明的是，在本申请实施例中，“反馈信息”也可以称为“否定应答(negative acknowledgement，NACK)”、“肯定应答(acknowledgement，ACK)”或者其他信息等，本申请实施例对此不作限定。
还需要说明的是，“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。下面将结合附图详细说明本申请提供的技术方案。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、第五代(5th generation，5G)移动通信系统或新无线(new radio，NR)通信系统以及未来的移动通信系统等。
图1是适用于本申请实施例的移动通信系统的架构示意图。如图1所示，该无线通信系统100可以包括至少两个终端设备(例如终端设备110和终端设备120等)和无线接入网设备130等。其中，终端设备120可以通过无线接入的方式与无线接入网设备130相连。 终端设备110和终端设备120可以是固定位置的设备，也可以是可移动的设备。
在无线通信系统100中，无线接入网设备130是终端设备120通过无线方式接入到该移动通信系统中的接入设备。该无线接入网设备130可以是：基站、演进型基站(evolved node B，eNB)、家庭基站、无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为NR系统中的gNB，或者，还可以是构成基站的组件或一部分设备，如汇聚单元(central unit，CU)、分布式单元(distributed unit，DU)或基带单元(baseband unit，BBU)等，本申请实施例对无线接入网设备130所采用的具体技术和具体设备形态不做限定。
在一些部署中，gNB可以包括集中式单元(centralized unit,CU)和分布式单元(distributed unit,DU)。gNB还可以包括有源天线单元(active antenna unit,AAU)。CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，网络设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为接入网(radio access network，RAN)中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，本申请对此不做限定。
应理解，无线接入网设备130可以简称为“网络设备”，如果无特殊说明，在本申请实施例中，网络设备均指无线接入网设备。在本申请实施例中，网络设备可以是指网络设备本身，也可以是应用于网络设备中完成无线通信处理功能的芯片。
该无线通信系统100中的终端设备110和终端设备120也可以称为终端、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。本申请实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑，还可以是应用于虚拟现实(virtual reality，VR)、增强现实(augmented reality，AR)、工业控制(industrial control)、无人驾驶(self driving)、远程医疗(remote medical)、智能电网(smart grid)、运输安全(transportation safety)、智慧城市(smart city)以及智慧家庭(smart home)等场景中的无线终端。本申请中将前述终端设备及可应用于前述终端设备的芯片统称为终端设备。应理解，本申请实施例对终端设备所采用的具体技术和具体设备形态不做限定。
还应理解，图1只是示意图，该无线通信系统100中还可以包括其它网络设备，如还可以包括核心网设备、无线中继设备和无线回传设备等，在图1中未画出。本申请的实施例对该无线通信系统100中包括的设备数量和设备类型不作限定。
如图1所示，在无线通信系统100中，终端设备120和网络设备130之间可以通过Uu接口进行通信。其中，用于承载上行控制信息和/或上行数据的链路称为上行链路 (uplink，UL)，例如，该物理上行信道可以包括LTE协议或NR协议中定义的物理上行控制信道(physical uplink control channel，PUCCH)、物理上行共享信道(physical uplink share channel，PUSCH)以及随着网络演变而定义的具有上述功能的其他上行信道。用于承载下行控制信息和/或下行数据的链路称为下行链路(downlink，DL)，例如，该物理下行信道可以包括物理下行控制信道(physical downlink control channel，PDCCH)、物理上行共享信道(physical downlink share channel，PDSCH)以及随着网络演变而定义的具有上述功能的其他下行信道等，本申请实施例对此不作限定。
此外，该无线通信系统100中的终端设备110和终端设备120之间也可以进行数据通信，即终端设备110和终端设备120之间可以不借助网络设备，直接进行终端设备110和终端设备120之间的数据通信。具体地，将终端设备110和终端设备120之间的接口称为PC5接口，终端设备110和终端设备120之间的链路称为侧行链路(sidelink，SL)。
上述介绍的包括无线接入网设备130、终端设备120、终端设备110的无线通信系统100可以称为“UE-to-Network relay”系统，终端设备120可以称为“relay UE”，终端设备110可以称为“remote UE”。以基站作为无线接入网设备130，基站与终端设备120之间建立连接，终端设备120与终端设备110之间建立SL连接，终端设备120可以帮助终端设备110接入基站获取网络服务。以下行通信过程为例，终端设备120可以将从基站获取的数据转发给终端设备110。以上行通信过程为例，终端设备120可以从终端设备110获取数据后，转发给基站，该技术可以提升小区覆盖范围。或者，也有可能终端设备110通过终端设备120驻留在无线接入网设备130下面的目标小区，并无数据服务。
一种可能的应用场景中，车用无线通信(vehicle to everything，V2X)系统(或者称为车辆网系统)就是一种典型的“UE-to-Network relay”系统。具体地，V2X是将车辆与一切事物相连接的新一代信息通信技术，其中V代表车辆，X代表任何与车交互信息的对象，例如包含车、人、交通路侧基础设施和网络等。V2X是物联网体系中最有产业潜力、市场需求最明确的领域之一，具有应用空间广、产业潜力大、社会效益强的特点。车联网通过车载传感器、车载终端等设备收集车辆信息，并通过V2X通信技术实现车与车(Vehicle-to-Vehicle，V2V)、车与人(Vehicle-to-Pedestrian，V2P)、车与路边基础设施(Vehicle-to-Infrastructure，V2I)以及车与网络(Vehicle-to-Network，V2N)之间的通信，车联网将成为未来实现智能交通系统的基础组成部分。
在V2X业务中，每个车可以理解为一个终端设备，可以称为“V2X UE”，以NR通信为例，NR PC5接口是V2X UE之间的直连通信接口。示例性的，如图1所示，终端设备110和终端设备120都可以作为“V2X UE”，终端设备110和终端设备120之间的直连通信链路即为SL链路，终端设备110和终端设备120之间可以通过SL直接进行数据传输，且不需要经过网络进行数据传输，可以有效地减少通信时延。
此外，对于V2X业务，该无线通信系统100中还可以包括V2X应用服务器等，终端设备120也可以通过NR Uu接口将V2X相关的数据发送到基站130，基站130再将V2X相关的数据发送至V2X应用服务器进行处理，再将处理后的数据经由终端设备120转发给接收方的终端设备110，本申请实施例对此不作限定。
应理解，除了前述介绍的V2X的场景之外，本申请的实施例还可以适用于其他更多的设备到设备(device to device，D2D)的数据传输，本申请的实施例对应用场景不作限 定。
还应理解，终端设备110(remote UE)和终端设备120(relay UE)之间的SL链路上可以支持广播、单播、组播的方式进行通信。
广播通信的过程中，终端设备120可以对外发送不加密的广播业务数据。其中，该终端设备120可以作为发送端设备(transmitting equipment，TX)，对于任何一个在该终端设备120的有效接收范围内的其他终端设备都可以作为接收端设备(receiving equipment，RX)，例如终端设备110等，如果对该广播的业务感兴趣都可以接收该广播业务的数据。
单播通信需要两个终端设备(例如TX和RX)之间先建立单播连接，在两个终端设备建立单播连接之后，可以基于协商的标识进行数据通信，该数据可以是加密的，也可以是不加密的。相比于广播通信，在单播通信中，只能是建立了单播连接的两个终端设备之间才能进行该单播通信。该单播通信类似于终端设备与网络设备之间建立无线资源控制(radio resource control，RRC)连接之后进行的数据通信的过程，此处不再赘述。
组播通信是指一个通信组内所有终端设备之间的通信，组内任意一个终端设备都可以作为TX或者RX，接收或发送该组播业务的数据，不属于该通信组内的终端设备不会接收并解析该组播业务的数据。
下面将结合图1所示的无线通信系统100，介绍在该系统100中传输系统信息(system information，SI)的方法。为方便理解，下面先介绍与SI的传输相关的几个概念：
1.系统信息(system information，SI)
一般SI可以由基站广播给终端设备，SI包含最小系统信息(minimum system
information，MSI)和其他系统信息(other system information，OSI)。MSI包含初始接入的基本信息的主信息块(master information block，MIB)，以及系统信息块1(system information block 1，SIB1)的调度信息，SIB1也可以称为(remaining minimum SI，RMSI)。
其中，MIB定义了小区最基本的系统信息以及解码SIB1所需要的参数，MIB在物理广播信道(physical broadcast channel，PBCH)上传输。SIB1包含随机接入所必须的一些参数，例如小区选择参数、接入控制参数、初始接入相关的信道配置信息、系统消息请求配置信息、其他系统消息的调度配置等，即SIB1包含其他SIB的调度信息。对于不广播SIB1的小区，终端设备不能驻留在该小区里。
在NR中，MSI的调度周期是固定的，其中，MIB的周期是80毫秒(millisecond，ms)周期，SIB1的周期是160ms。
2.OSI的调度
OSI包含除了MSI外的其他所有的SIBs，即SIB2至SIBn，并且承载在物理下行控制信道(physical downlink control channel，PDSCH)上，支持周期性的广播，主要包含小区重选参数，公共安全等参数等。
OSI的调度以系统信息消息(system information message，SI message)为单位进行发送。每个SI message包含一个或者多个除SIB1外的拥有相同调度需求的SIB，一个SI message包含的所有SIB具有相同的传输周期。表1示出了一种可能的SI message和SIB的映射关系。SI message和SIB的映射关系包含在SIB1中，在信元SI-schedulingInfo中指示。SI-schedulingInfo信元中包含了多个schedulingInfo，每个schedulingInfo包含了一个SI message和SIB的映射关系。示例性的，如表1所示，例如schedulingInfo 1指示SIB2 和SIB3映射到SI message 1；schedulingInfo 2指示SIB4和SIB5映射到SI message 2；schedulingInfo 3指示SIB6和SIB7映射到SI message 3等。
表1
Figure PCTCN2022091229-appb-000001
其中，SIB和SI message之间的映射关系遵循以下规则：
(1)相同传输周期的SIBs可以映射到相同的SI message中，也可以映射到不同的SI message中，每个SIB只包含在一个SI message中。
(2)不同传输周期的SIBs映射到不同SI message中。
3.OSI的发送
OSI的发送方式有两种，一种是基于广播调度的方式，另一种是基于“on-demand”的方式。其中，对于广播调度的方式，基站在系统信息窗口(system information-windows，SI-windows)中广播OSI，且每个SI message只在一个SI窗口中传输。具体地，遵循以下规则：
(1)一个SI message可以和一个SI-window相关联，该SI-window内只能发这个SI message且可以重复发送多次。具体的发送次数、在哪些时隙(slot)上发送等，可以取决于基站的实现，但一个SI-window内不能发送其它SI message。
(2)SI-window之间是紧挨着的，对于任意两个相邻的SI-window，既不重叠，也不会有空隙。
(3)所有SI message的SI-window长度都相同。
(4)不同SI message的周期是相互独立的。
(5)每个SI message至少包含1个SIB，相同调度周期的SIB可以在同一个SI message中传输。
gNB通过SIB1告诉UE有哪些SI message，每个SI message包含了哪些SIB，这些SI message会在哪个SI-window发送以及SI-window的时域位置和长度。此外，gNB不会告诉UE在SI窗口的哪些子帧调度了该SI message。当UE需要某个SIB时，它就会在该SIB对应的SI message关联的SI-window的每个子帧使用系统信息无线网络临时标识(system information-radio network temporary identifier，SI-RNTI)去尝试解码下行控制信息(downlink control information，DCI)，直到成功接收到SI message为止。例如，从SI-window的起始子帧开始，除了不能调度SI的子帧之外，在SI-window Length个子帧内去尝试解码DCI。
此外，UE还可以用on-demand方式获取OSI，即请求其他系统信息(on demand other system information，ODOSI)。对于是否采用on-demand SI，可以由SchedulingInfo中的SI-BroadcastStatus信令指示，若为notBroadcasting则表示是on demand SI。
可选地，以终端设备和基站的通信过程为例，当终端设备处于无线资源控制连接态 (radio resource control CONNECT，RRC CONNECT)时，可以通过RRC专用信令DedicatedSIBRequest来请求获取OSI，请求的最小粒度是SIB。
应理解，当终端设备处于空闲态(RRC IDLE)或非连接态(RRC INACTIVE)时，如果SIB1中指示支持ODOSI，并且SI-SchedulingInfo字段包括SI-RequestConfig或者SI-RequestConfigSUL，那么表明可以通过on-demand流程来获取OSI。该字段配置了SI request专用随机接入资源，包含SI和preamble的对应关系，即发送随机接入时选择所请求的SI对应的前导码preamble。RRC会触发MAC层利用SI-RequestConfig消息中包含的PRACH preamble(s)和PRACH resource(s)发起初始随机接入流程，此时UE通过使用Msg1通知网络侧来请求OSI。
若SIB1中的SI-SchedulingInfo未包含SI-RequestConfig或SI-RequestConfigSUL，UE应触发RRC信令RRCSystemInfoRequest来通知基站获取这些系统消息。通过MSG3(竞争随机接入的message 3)请求OSI。
基站接收到UE的请求消息后，通过PDCCH DCI指示UE在相应的SI-window中进行接收。
还应理解，本申请实施例所介绍的传输SI可以理解为主要针对OSI的传输过程，即在“UE-to-Network relay”系统中，relay UE和remote UE之间传输OSI的过程。
图2是本申请实施例提供的一例传输系统信息SI的方法的示意性流程图。该方法200可以应用于上述包括第一终端设备(relay UE)、第二终端设备(remote UE)和网络设备(基站)的无线通信系统100中，其中，第一终端设备(relay UE)和一个或多个第二终端设备(remote UE)建立侧行链路SL连接，且所述每个第二终端设备通过所述第一终端设备获取目标小区的网络服务，所述目标小区是所述第一终端设备的服务小区。应理解，本申请实施例的第二终端设备可以是连接态或者非连接态。
如图2所示，该方法200包括以下内容：
S210，一个或多个第二终端设备向第一终端设备发送第一请求消息，所述第一请求消息用于请求获取服务小区的M个系统信息块SIB或系统信息SI消息；相应地，第一终端设备接收所述一个或多个第二终端设备发送的第一请求消息。
应理解，remote UE可以向relay UE发送第一请求消息，用于请求获取自己所需要的SI。其中，根据前述关于SI的介绍，该第一请求消息可以用于一个或多个remote UE请求所需要的M个SI message，或者该第一请求消息可以用于一个或多个remote UE请求所需要的M个SIB，每个remote UE请求的系统消息可以是M个SI message中的一个或多个SI message，或者每个remote UE请求的系统消息可以是M个SIB中的一个或者多个SIB，本申请实施例对此不作限定。
一种可能的实现方式中，第一请求消息可以通过侧行链路上的无线资源控制RRC信令，或媒体访问控制(media access control，MAC)-控制元素(control element，CE)，或通过侧行链路控制信息(sidelink control information，SCI)，或PC5-S信令(PC5-S signaling)发送。例如，remote UE可以通过PC5-RRC信令给relay UE发送系统消息请求。
S220，第一终端设备确定所述M个SIB或SI消息对应的N个目标标识，N为大于或等于1的整数且N≤M。
应理解，remote UE和relay UE之间建立了SL连接，SL上可以支持广播、组播、单 播的通信方式，三种通信方式主要是由接入层(access stotum，AS)中的源标识(source layer-2 ID，SRC ID)和目标标识(destination layer-2 ID，DST ID)来实现，或者称为“源地址”和“目标地址”。
表2是一种可能的消息的简化格式。如表2所示，DST ID可以根据SL上广播、组播、单播等不同的通信方式进行分配。可选地，DST ID可以设置成单播、组播或者广播的目标标识，用于接收端设备的接收。
SRC ID用于标识发送端设备的身份标识(identity，ID)。可选地，SRC ID可以由终端设备自己分配。例如对于relay UE，SRC ID可以是relay UE的设备标识，或者relay UE用于和remote UE在SL上进行单播通信的源L2ID，或者专门为系统消息组播或广播分配的源标识等。
Frame type用于标识数据帧的类型，可选地，可以用Frame Type的内容指示该消息内容为系统消息请求。
表2
SRC ID DST ID Frame type Frame payload
在本申请实施例中，“目标标识”可以理解为消息中的DST ID，或者称为“DST L2ID”。当relay UE接收到一个或多个remote UE发送的第一请求消息之后，可以解析第一请求消息的内容，并准确获知所有的remote UE所需要的M个SI message，或者所有的remote UE所需要的M个SIB，relay UE再为M个SI message或者M个SIB确定其对应的不同的L2 ID。
S230，第一终端设备通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息，所述第二消息包括所述M个SIB或SI消息，且所述第二消息包括对应的目标标识。
可选地，在本申请中，所述第二消息可以代表一个消息，例如第二消息是一个广播消息，即广播消息中包括所述一个或多个第二终端设备请求的所有的M个SIB或SI message。
或者，所述第二消息还可以代表多个消息，例如所述第二消息对应多个组播消息，即多个组播消息中包括所述一个或多个第二终端设备请求的所有的M个SIB或SI message，且每一个组播消息可能包括当前的第二终端设备请求的某个或者某几个SIB或SI message，每个组播消息中包含的SIB和SI同属于一个分组，例如，表4中的SIB2和SIB3，再如，表6中的SI消息1和SI消息2。
在后续实施例的描述中，“发送所述第二消息”和“发送M个SIB或SI message”表达相同的含义，即第一终端设备通过发送一个或多个消息的方式向所述一个或多个第二终端设备发送所请求的SIB或SI message。应理解，不论是第二消息作为一个消息，或者对应多个独立的不同消息，均落入本申请实施例的保护范围，后续不再赘述。
S240，所述一个或多个第二终端设备接收所述第一终端设备通过广播或组播的方式发送的所述第二消息。
可选的，remote UE可以采用非连续性接收(discontinuous reception，DRX)的接收方式进行SI的接收，监听时机适配relay UE的发送周期，以实现更多的节能。
可选地，本申请实施例中所描述的“发送的所述M个SIB或SI消息”可以理解为仅将多个第二终端设备请求的所有的M个SIB作为广播消息，广播给该多个第二终端设备。或者，“发送的所述M个SIB或SI消息”可以理解为第一终端设备直接将gNB广播的SI 全部广播给该多个第二终端设备，换言之，第一终端设备发送给第二终端设备的广播消息除了所述M个SIB或SI消息之外，还可能包括其他的SIB或SI消息，该其他的SIB或SI消息可能不是第一请求消息请求的，本申请实施例对此不作限定。
可选地，S240中，第一终端设备可以周期性地向所述一个或多个第二终端设备发送所述M个SIB或SI消息，相应地，所述一个或多个第二终端设备可以周期性地接收所述第一终端设备通过广播或组播的方式发送的所述M个SIB或SI消息。应理解，该周期可以是第一终端设备和第二终端设备约定好的周期，该周期可以由第一终端设备确定，并通过sidelink上的RRC消息、PC5-S信令等方式向第二终端设备指示，本申请实施例对此不作限定。
一种可能的方式中，所述M个SIB或SI消息可以对应一个相同的目标标识，所述目标标识指示第一终端设备通过广播方式向一个或多个第二终端设备发送所述M个SIB或SI消息。
示例性的，可以为relay UE下连接的所有remote UE分配用于广播发送的广播标识L2ID，在该方式中，relay UE将应用该相同的广播标识L2ID向所有的remote UE发送广播消息，相应地，remote UE将应用该广播标识L2ID来接收relay UE的广播消息，该广播消息可以包括一个或多个remote UE请求的M个SIB或M个SI message。
可选地，当所述M个SIB或SI消息对应一个相同的目标标识时，所述目标标识可以是预设的标识。例如，所述M个SIB或SI消息对应一个广播标识L2ID，该广播标识L2ID可以由协议规定。
具体地，relay UE在广播包括M个SIB或M个SI message的系统信息时，该系统信息携带有SRC ID和DST ID，其中DST ID即为上述协议规定的广播标识L2ID。由于该广播标识L2ID是协议中预先规定的，remote UE和relay UE就可以知道应用该L2ID接收系统信息的广播，因此不需要relay UE再告知remote UE该广播标识L2ID。当remote UE接收到广播消息，可以根据广播消息中的L2ID接收包括M个SIB或M个SI message的系统信息。
可选地，当所述M个SIB或SI消息对应一个相同的目标标识时，即第一终端设备通过广播方式向一个或多个第二终端设备发送所述M个SIB或SI消息，所述M个SIB或SI消息还包括所述第一终端设备的标识。
应理解，当remote UE在多个relay UE的信号覆盖范围内时，remote UE可能会接收到周边多个relay UE发送的广播消息，为了识别该广播消息是自己所连接的relay UE发送的，remote UE还可以根据接收的多个广播消息中携带的SRC ID来判断该广播消息是否来自于自己所连接的relay UE，即根据表2列举的消息结构中的SRC ID来判断该广播消息是否来自于自己所连接的relay UE。
示例性的，当remote UE 1接收到5个relay UE发送的5种广播消息，remote UE 1可以获取每一个广播消息中携带的SRC ID，当SRC ID为自己连接的relay UE的设备标识时，判断该广播消息是remote UE 1所需要的，并解析该广播消息的内容，进而获取请求的M个SIB或SI消息。
上述第一终端设备的标识可以是relay UE的设备标识，或者relay UE用于和remote UE在SL上进行单播通信的源L2ID，或者专门为系统消息组播或广播分配的源标识等，本申 请实施例对此不作限定。
以V2X场景为例，广播方式的具体实现过程中，广播标识L2ID(例如DST ID)的配置依赖于V2X服务，该广播标识L2ID可以由relay UE的应用层(例如V2X层)预配置，或者可以由V2X应用服务器预配置，又或者5G核心网的分组控制功能(packet control function，PCF)可以为relay UE提供V2X业务类型和DST ID的映射关系，根据不同的业务类型预配置不同的广播标识L2ID，本申请实施例对此不作限定。
可选的，该系统消息的广播可以以Uu信息转移(information transfer)的形式下发，即所有基站侧的AS消息(例如paging消息、SI消息等)以RRC container的形式包含在Uu information transfer的RRC消息中，然后按照分配的该广播标识L2ID下发给remote UE。
具体地，作为一个RRC container的示例，假设包含AS消息的RRC container为AS-RRC-message。relay UE接收到AS-RRC-message之后，将AS-RRC-message承载在SL上的UuInformationTransfer中，发送给remote UE。其中，UuInformationTransfer可以为在SL上用于转发AS层信令的PC5-RRC消息。一种可能的形式为：
UuInformationTransfer-IEs::＝SEQUENCE{
AS-RRC-Message OCTET STRING OPTIONAL,
}
一种可能的情况中，relay UE中可能已经有remote UE请求的系统信息，例如relay UE中已经有remote UE请求的所述M个SIB或SI消息，那么relay UE可以直接通过前述介绍的广播消息的方式将包括所述M个SIB或SI消息的系统信息发送给remote UE。
另一种可能情况中，relay UE中可能不包括remote UE请求的系统信息，例如relay UE中没有remote UE请求的所述M个SIB或SI消息，那么relay UE可以通过以下两种方式获取所述M个SIB或SI消息。那么，在S230之前，方法200还可以包括以下方式一和/或方式二对应的步骤：
方式一
S220-1，第一终端设备接收网络设备周期性广播的所述M个SIB或SI消息。
示例性的，在图1所示的无线通信系统100中，gNB可以按照SIB1中信元SI-SchedulingInfo的配置，向relay UE广播SI。当relay UE在收到第一请求消息之后，确定所请求的所述M个SIB或SI消息，等待gNB广播的SI，直到获取了所述M个SIB或SI消息，再执行S230。该方式中，relay UE不需要占用额外的资源向网络设备请求获取SI，可以减少信令的开销。
方式二
S220-2，第一终端设备向网络设备发送所述第一请求消息；相应地，网络设备接收所述第一请求消息。
S220-3，网络设备根据所述第一请求消息，向第一终端设备发送所述M个SIB或SI消息，相应地，第一终端设备接收网络设备发送的所述M个SIB或SI消息。
应理解，方式一和方式二的方法可以同时或单独使用，例如，remote UE向relay UE请求SI message 1、SI message 2和SI message 3，relay UE接收gNB周期性广播的SI message 2，可以仅向gNB再请求SI message 1和SI message 3，本申请实施例对此不作限定。
可选地，S220-2和S220-3中的“第一请求消息”可以是S210中的第一请求消息，即用于请求所述M个SIB或SI消息。或者，S220-2和S220-3中的“第一请求消息”和S210中的第一请求消息都用于请求所述M个SIB或SI消息，但是可以具有不同的消息形式或消息结构等，具体根据第一终端设备和网络设备之间的具体实现决定。或者，S220-2和S220-3中的“第一请求消息”和S210中的“第一请求消息”用于请求的SIB或SI消息不同，例如S210中的“第一请求消息”用于请求SI message 1、SI message 2和SI message 3，S220-2和S220-3中的“第一请求消息”用于请求SI message 1和SI message 3，本申请实施例对此不作限定。
示例性的，relay UE可以向gNB发送该第一请求消息，请求内容为remote UE所请求的M个SIB或SI消息，或者M个SIB或SI消息中的部分消息(剩余部分为relay UE自身已有的SIB或SI消息)。gNB收到该第一请求消息后，给relay UE下发所请求的SIB或SI消息，具体的，该方式二中包括的S220-2和S220-3可以参照现有的请求SI的过程，为了简便，此处不再赘述。
可选地，对于relay UE通过广播的形式向remote UE发送所请求的M个SIB或SI消息的过程，其他更多的remote UE虽然没有请求但也有可能收到该广播消息，此时该其他更多的remote UE也可以接收该广播消息，即直接接收M个SIB或SI消息，保留后续使用等，本申请实施例对此不作限定。
通过上述实现方式，relay UE可以以广播消息的方式向一个或多个remote UE发送的SI message或者发送SIB，当多个remote UE向relay UE请求获取系统信息时，避免了relay UE通过单播通信占用更多的SL资源向多个remote UE发送系统信息，从而节省通信资源。
或者，又一种可能的方式中，除了上述介绍的广播的方式，relay UE还可以以组播的方式向一个或多个remote UE发送的SI message或者发送SIB。relay UE可以根据不同的规则或场景为一个或多个remote UE确定不同的组播标识。
应理解，在一个或多个remote UE向relay UE发送请求的过程中，可能一个或多个remote UE并不是一起发送第一请求消息的。可选地，可以为relay UE设置预定时段(timer)，每个预订时段内或每次timer到期时，对该timer到期前收到的一个或多个remote UE请求的SI message或者SIB进行分组，后续不再赘述。
可选地，所述M个SIB或SI消息中的所有的SIB或SI消息对应一个相同的目标标识，所述目标标识指示第一终端设备通过组播方式向一个或多个第二终端设备发送所述M个SIB或SI消息。
示例性的，relay UE可以将所有的M个SI message分为一组并分配一个唯一的组播标识L2ID，即M个SI message对应1个组播标识L2ID；或者说，将所有的M个SIB分为一组并分配一个唯一的组播标识L2ID，即M个SIB对应1个组播标识L2ID。其中，该组播标识L2ID可以是由relay UE的AS层分配的，或者由V2X层基于AS层的服务请求分配的，或者由AS层在V2X层预先提供的多个L2ID中选择的，本申请实施例对此不作限定。表3列举了一种可能的组播方式的中分配的组播标识，如表3所示，SI message 1、SI message 2和SI message 3都对应一个组播标识L2ID 1，或者说SIB2-SIB7都对应一个组播标识L2ID 1。
表3
Figure PCTCN2022091229-appb-000002
通过上述方式，当remote UE以on-demand的方式向relay UE请求获取SI时，relay UE可以通过组播方式向remote UE下发SI，其中remote UE可以将relay UE请求获取的所有的SI message为一组，并分配一个组播标识L2ID。relay UE可以将该组播标识L2ID告知remote UE，以便remote UE使用该组播标识L2ID进行SI的接收。该组播标识L2ID可以在remote UE接入relay UE时就告知给remote UE；或者在remote UE给relay UE发送第一请求之后，告知给remote UE。
或者，可选地，所述M个SIB或SI消息中的每一个SIB或SI消息作为一组，每一组对应不同的目标标识，所述目标标识指示第一终端设备通过组播方式向一个或多个第二终端设备发送所述M个SIB或SI消息。
示例性的，relay UE可以将所有的M个SI message分为M组并为每一组都分配一个唯一的组播标识L2ID，即M个SI message对应M个组播标识L2ID；或者说，将所有的M个SIB分为M组并为每一组都分配一个唯一的组播标识L2ID，即M个SIB对应M个组播标识L2ID。其中，该组播标识L2ID可以是由relay UE的AS层分配的，或者由应用层(例如V2X层等)基于AS层的服务请求分配的，或者由AS层在应用层预先提供的多个L2ID中选择的，本申请实施例对此不作限定。表4列举了一种可能的组播方式的中分配的组播标识，如表4所示，SI message 1(SIB2、SIB3)对应一个组播标识L2ID 1，SI message 2(SIB4、SIB5)对应一个组播标识L2ID 2，SI message 3(SIB6，SIB7)对应一个组播标识L2ID 3。
表4
Figure PCTCN2022091229-appb-000003
通过上述方式，当remote UE以on-demand的方式向relay UE请求获取SI时，relay UE可以通过组播方式向remote UE下发SI，其中remote UE可以将relay UE请求获取的M个SI message为M组，并为每一个组分配一个组播标识L2ID。relay UE可以将每一组的该组播标识L2ID告知remote UE，或者将SI message和组播标识之间的对应关系告知remote UE，或者SIB和组播标识之间的对应关系告知remote UE，以便remote UE使用每一组SI message对应的组播标识L2ID进行SI的接收。
又或者，可选地，所述M个SIB或SI消息中的K个SIB或SI消息对应一个相同的目标标识，1≤K<M，所述目标标识指示第一终端设备通过组播方式向一个或多个第二终端 设备发送所述M个SIB或SI消息。
示例性的，relay UE可以将所有的M个SI message分为N组并为每一组都分配一个唯一的组播标识L2ID，即M个SI message对应N个组播标识L2ID；或者说，将所有的M个SIB分为N组并为每一组都分配一个唯一的组播标识L2ID，即M个SIB对应N个组播标识L2ID。表5列举了一种可能的组播方式的中分配的组播标识，如表5所示，SI message 1(SIB2、SIB3)和SI message 2(SIB4、SIB5)对应一个组播标识L2ID 1，SI message 3(SIB6，SIB7)对应一个组播标识L2ID 3。
表5
Figure PCTCN2022091229-appb-000004
通过上述方式，当remote UE以on-demand的方式向relay UE请求获取SI时，relay UE可以通过组播方式向remote UE下发SI，其中remote UE可以将relay UE请求获取的M个SI message为N组，并为每一个组分配一个组播标识L2ID。relay UE可以将当前请求的SI message对应的该组播标识L2ID告知remote UE，或者将SI message和组播标识之间的对应关系告知remote UE，或者SIB和组播标识之间的对应关系告知remote UE，以便remote UE使用每一组SI message对应的组播标识L2ID进行所请求的SI的接收。
又或者，relay UE对M个SI message或SIB进行分组的原则可灵活设计。可选地，relay UE可以将请求相同SIB的多个remote UE划分为一个组，从而减少relay UE发送组播消息所需的SL资源以及组播消息的大小。
可选地，relay UE还可以根据SI message的内容分组，例如可以将全部和sidelink配置相关的系统消息(即5G系统中的SIB12、SIB13、SIB14)划分为一个组，并配置相应的L2ID。
可选地，还可以由基站根据历史系统消息请求信息进行分组，例如，基站可以根据历史信息将通常一起请求的系统消息划分为一个组，再将分组信息告知给relay UE，再由relay UE为不同的分组分配L2ID，也可以由基站分配L2ID，并将分组和L2ID的对应关系告知给relay UE，最后，relay UE直接应用该基站配置的映射关系。
另外，relay UE还可以按需更新分组方式，例如根据当前或者最近一段时间内的remote UE的系统消息请求情况，将remote UE同时请求的SIB消息或者SI消息尽量划分为一个组，以便于在同一个组播消息中能够下发给remote UE。例如，remote UE1请求了SI message 1和SI message 2，remote UE2请求了SI message 2和SI message 3，则可以将SI message1、SI message2和SI message3划分为一个组。若是过了一段时间，relay UE发现remote UE不再同时请求SI message 1和SI message 2或者SI message 2和SI message 3，则将分组以及映射关系进行相应更新。
示例性的，表6列举了一种可能的组播方式的中分配的组播标识，如表6所示，假设gNB的配置中，SIB和SI message的映射关系为：SIB2、SIB3对应SI message1，SIB4、 SIB5对应SI message2，SIB6、SIB7对应SI message3。
如果remote UE1请求SIB2、SIB3，remote UE2请求SIB3、SIB4，remote UE3和remote UE4都请求SIB6、SIB7，remote UE5请求SIB5。根据SIB和SI messgae之前的映射关系，relay UE可以将SI message1和SI message2划分为一组，分配组播标识L2ID1，将SI message3分配为另一组，分配组播标识L2ID2。
表6
remote UE(s) SIB(s) SI message 组播标识
UE1、UE2、UE5 SIB2、SIB3、SIB4、SIB5 SI message1、SI message2 L2ID1
UE3、UE4 SIB6、SIB7 SI message3 L2ID2
或者，示例性的，relay UE直接以SIB为单位进行分组，虽然在Uu口发送SI是以SI message为单位，但是在PC5口可以直接以SIB为单位进行发送，因此在分组的时候可以直接以SIB为粒度进行分组。
仍然以上述表6为例，由于remote UE 1和remote UE 2有相同的对于SIB3的需求，同时为了满足remote UE 1对于SIB2的需求以及remote UE2对于SIB4的需求，relay UE可以将SIB2、SIB3、SIB4分为一组，并分配组播标识。另外，不再考虑将SIB4和SIB5映射在一个SI message中，而将SIB4和SIB5分为两个组，并分别分配组播标识。最后，relay UE的分组结果可以如下表7所示，此处不再赘述。
表7
remote UE(s) SIB(s) 组播标识
UE1、UE2 SIB2、SIB3、SIB4 L2ID1
UE3、UE4 SIB6、SIB7 L2ID2
UE5 SIB5 L2ID3
通过上述方式，当remote UE以on-demand的方式向relay UE请求获取SI时，relay UE可以通过组播方式向remote UE下发SI，其中remote UE可以根据一个或多个remote UE请求获取的M个SI message、M个SIB、remote UE的数量等，灵活地进行分组，并为每一个组分配一个组播标识L2ID。relay UE可以将每一组的该组播标识L2ID告知remote UE，或者将SI message和组播标识之间的对应关系告知remote UE，或者SIB和组播标识之间的对应关系告知remote UE，以便remote UE使用每一组SI message对应的组播标识L2ID进行SI的接收，提升了SI的发送效率以及更新效率。
一种可能的实现方式中，第一终端设备向所述一个或多个第二终端设备发送所述M个SIB或SI消息可以是周期性地向所述一个或多个第二终端设备，以组播方式发送所述M个SIB或SI消息。
可选地，relay UE从gNB处获取到remote UE请求的所述M个SIB或SI消息之后，可以将remote UE请求的所述M个SIB或SI消息组合为一个消息，例如组合为一个新的 SI message，并通过组播的方式发送给remote UE。
可选地，relay UE可以周期性地向remote UE组播发送remote UE请求的所述M个SIB或SI消息，其中组播周期可以由relay UE配置，或者由gNB配置并发送给relay UE，并且通过广播或者组播或者单播的方式告知给remote UE。在周期性地发送组播消息时，relay UE可以只组播已经获得的remote UE请求的SIB或SI消息，对于有些未获得的remote UE请求的SIB或SI消息，relay UE将继续等待gNB发送之后，在后续周期内再进行组播，本申请实施例对此不作限定。
可选地，relay UE的组播周期还可以参考SIB1中的周期配置，例如结合SI-SchedulingInfo中的周期确定该组播周期。或者，也可以由relay UE重新配置一个组播周期并将其告诉remote UE。又或者，也可以根据新的timer进行配置。
可选的，relay UE也可以在获取到remote UE发送的第一请求消息之后立即下发组播消息。
一种可能的情况中，relay UE中可能已经有remote UE请求的系统信息，例如relay UE中已经有remote UE请求的所述M个SIB或SI消息，那么relay UE可以直接通过前述介绍的广播消息的方式将包括所述M个SIB或SI消息的系统信息发送给remote UE。
另一种可能情况中，relay UE中可能不包括remote UE请求的系统信息，例如relay UE中没有remote UE请求的所述M个SIB或SI消息，那么relay UE可以通过以下两种方式获取所述M个SIB或SI消息。那么，在S230之前，方法200还可以包括前述介绍的方式一对应的S220-1，和/或方式二对应的220-2和220-3，具体参考前述相关介绍，为了简便，此处不再赘述。
通过上述方式，当remote UE以on-demand的方式向relay UE请求获取SI时，relay UE可以通过组播方式向remote UE下发SI，其中remote UE可以将relay UE请求获取的所有的M个SI message划分为N组，并为每一组分配一个组播标识L2ID，以便remote UE使用该不同的组播标识L2ID接收不同组的SI message。
对于组播来说，应用层会提供该组播标识的信息，relay UE可以将该组播标识转换成DST ID；如果未提供该组播标识的信息，则relay UE可以使用广播机制中业务类型到DST ID的映射关系来进行确定。
可选地，第一终端设备确定所述M个SIB或SI消息对应的N个目标标识之后，第一终端设备可以向所述一个或多个第二终端设备发送第一映射关系的信息，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。相应地，所述一个或多个第二终端设备接收所述第一终端设备发送的第一映射关系的信息，并根据所述第一映射关系的信息接收所述第一终端设备发送的所述M个SIB或SI消息。
示例性的，第一映射关系可以是如表3至表5中列举的任意一种SI message和组播标识之间的对应关系，或者SIB和组播标识之间的对应关系，此处不再赘述。
可选地，当remote UE和relay UE建立连接的时候，relay UE就可以直接将第一映射关系发送给remote UE，或者，当remote UE接收到relay UE发送的第一请求消息的时候，relay UE就可以直接将第一映射关系发送给remote UE，本申请实施例对此不作限定。
或者，一种可能的情况中，当所述第一映射关系变化时，所述第一终端设备向所述第二终端设备发送更新后的第一映射关系的信息。
又或者，另一种可能的情况中，当有新的remote UE(例如第三终端设备)接入所述该relay UE时，relay UE可以向新的remote UE(例如第三终端设备)发送所述第一映射关系的信息。
可选地，当relay UE更新了第一映射关系或者接收到SI change indication指示SI message和SIB之间的映射关系改变时，relay UE可以直接将映射关系修改的信息、映射关系更新的信息或映射关系删除的信息发送给remote UE，并指示remote UE进行相应的映射关系更新、修改或删除；或者，relay UE可以直接将修改后的新的第一映射关系的信息发送给remote UE，本申请实施例对此不作限定。
可选地，当relay UE收到gNB的SI变更指示，指示某些系统消息内容改变后，relay UE接收gNB广播的更新后的SI，再通过组播或者广播方式向remote UE发送更新后的SI。
另一种可能的实现方式中，所述第一终端设备确定所述M个SIB或SI消息对应的N个目标标识之后，所述第一终端设备向所述一个或多个第二终端设备发送所述M个SIB或SI消息中每一个SIB或SI消息对应的目标标识的信息。相应地，所述一个或多个第二终端设备接收所述第一终端设备发送的所述M个SIB或SI消息中每一个SIB或SI消息对应的目标标识的信息。
可选地，relay UE可以通过PC5接口向remote UE发送目标标识的信息。或者，relay UE可以应用一个default DST ID来建立和remote UE的单播连接，该default DST ID同样和业务类型相关联。应理解，在单播通信过程中，SL两端的relay UE可以在和remote UE还可以定期地更新L2ID，以保证通信的安全，此处不再赘述。
可选地，当remote UE感兴趣的SI message或SIB发生变更，并发起新的系统消息请求时，relay UE需要根据remote UE重新请求的SI message或SIB重新分配组播标识L2ID。
应理解，与上述relay UE向remote UE发送第一映射关系的信息的过程不同，当relay UE确定remote UE当前请求的是SI message 1，且relay UE确定SI message 1对应的组播标识为L2ID 1，那么relay UE可以将该组播标识L2ID 1发送给remote UE，而不需要再发送第一映射关系的信息。
还应理解，relay UE向remote UE发送该组播标识L2ID 1可以发生在发送第一请求消息之后，relay UE向remote UE发送该发送第一映射关系可以发生在发送第一请求消息之前或之后，或者，当有新的remote UE和relay UE建立连接时，relay UE直接通过单播方式向新的remote UE发送该组播标识L2ID 1或第一映射关系的信息。
可选的，该组播标识L2ID 1或第一映射关系的信息可以在discovery消息中携带给remote UE，或者可以在单播连接建立之后，通过PC5-RRC信令传输，本申请实施例对此不作限定。
一种可能的实现方式中，当remote UE收到relay UE发送的所述M个SIB或SI消息之后，可以向relay UE发送反馈消息，以告诉relay UE是否成功接收了所述M个SIB或SI消息。那么，该场景下，方法200还可以包括：
S250，一个或多个第二终端设备向所述第一终端设备发送反馈消息，相应地，所述第一终端设备接收所述反馈消息，其中，所述反馈消息用于指示是否成功接收所述第二消息。
可选地，当所述第一终端设备根据所述反馈消息确定每一个所述第二终端设备都成功 地接收所述第二消息时，所述第一终端设备可以停止发送所述M个SIB或SI消息。示例性的，当所有的relay UE确认一个或多个remote UE中所有remote UE都收到SI之后，停止发送组播消息或广播消息。
应理解，对于广播和组播的不同方式，S250可以对应的不同的实现过程。
一种可能的实现方式中，如果S230中，第一终端设备通过广播消息的方式向一个或多个第二终端设备发送所述第二消息时，当第一终端设备接收到一个或多个第二终端设备中所有的第二终端设备的反馈消息，并根据该反馈消息确定一个或多个第二终端设备中所有的第二终端设备都成功地接收了所述第二消息时，第一终端设备停止发送广播消息。
另一种可能的实现方式中，如果S230中，第一终端设备通过组播消息的方式向一个或多个第二终端设备发送所述第二消息时，因为不同的分组发送的是不同的组播消息(例如N个分组发送的是N个不同的组播消息)，那么当第一终端设备接收到每个分组对应发送过第一请求消息的所有第二终端设备的反馈消息，并根据该反馈消息确定该每个分组对应发送过第一请求消息的所有第二终端设备都成功地接收了所述第二消息时，第一终端设备停止发送组播消息。可选地，该方法200也可以不包括S250的过程，例如预先设定第一终端设备向第二终端设备发送广播消息和组播消息的次数等。示例性的，relay UE可以仅向一个或多个remote UE发送3次组播消息或广播消息，之后就停止发送，本申请实施例对此不作限定。
此外，在本申请实施例中，当SI发生改变时，例如relay UE通过寻呼下行控制信息(downlink control information，DCI)收到gNB发送的SI变更的指示，指示SI message和SIB1对应关系发生改变，此时relay UE可以无需更新目标标识，可以继续以此前分配的目标标识发送组播消息或广播消息。
综上所述，通过上述方法200，relay UE可以以组播消息的方式向一个或多个remote UE发送的SI message或者发送SIB，当relay UE接收到一个或多个remote UE发送的SI请求，请求获取SI message或SIB，relay UE可以将所有的SI message或SIB归为一组并为该组分配组播标识L2ID，并通过单播的方式将此组播标识L2ID发送给每一个remote UE。或者，将所有的SI message或SIB归为多个组(例如N组)并为每一组分配一个组播标识L2ID，并通过单播的方式将此组播标识L2ID和SI message或SIB之间的第一映射关系发送给每一个remote UE。后续relay UE可以通过在SL上发送组播消息的方式向该一个或多个remote UE发送SI，提升了SI的发送效率。此外，当组播标识发生变化或SI发生变化时，relay UE还可以维护组播标识L2ID和SI message或SIB之间的第一映射关系的信息，在SL上通过单播的方式通知相关的remote UE，进一步提升了SI的发送效率和更新效率。
在另一种可能的实现方式中，relay UE可以接收remote UE发送的第一请求消息，但是relay UE仅仅作为中继设备，不解析该第一请求消息的内容，将该第一请求消息转发给gNB。
在该场景中，本申请实施例还提供了另一例传输系统信息SI的方法，图3是本申请实施例还提供的另一例传输系统信息SI的方法的示意性流程图。应理解，该方法300可以应用于上述包括第一终端设备(relay UE)、第二终端设备(remote UE)和网络设备(基站)的无线通信系统100中，其中，第一终端设备(relay UE)和一个或多个第二终端设 备(remote UE)建立侧行链路SL连接。
如图3所示，该方法300包括以下内容：
S310，一个或多个第二终端设备向第一终端设备发送第一请求消息，相应地，第一终端设备接收所述一个或多个第二终端设备发送的第一请求消息，并将所述第一请求消息发送给网络设备。其中，所述第一请求消息用于请求获取服务小区的M个SIB或SI消息。
可选地，在relay UE的中继下，连接态的remote UE可以通过RRC信令将第一请求消息直接发给gNB，由于relay UE通过无线链路控制(radio link control，RLC)层以下进行中继，RRC消息为高层的信令，因此relay UE无法知道remote UE的第一请求消息的内容，即relay UE无法知道remote UE请求的M个SIB或SI message。
因此，可以由gNB将remote UE请求的所述M个SIB或SI message转告给relay UE，此时relay UE获取所述请求的M个SIB或SI message的方式有以下三种：
方式一
S320-1，网络设备向第一终端设备发送第一指示信息，所述第一指示信息用于指示发送所述第一请求消息的一个或多个第二终端设备和请求的所述M个SIB或SI消息。
示例性的，remote UE可以通过RRC信令将第一请求消息直接发给gNB，gNB根据第一请求消息，向该remote UE对应的relay UE发送该第一指示信息，该第一指示信息用于指示所述M个SIB或SI消息，以及所述M个SIB或SI消息为其下面的哪一个remote UE所请求的。然后gNB可以再通过一个单独的消息向relay UE发送所述M个SIB或SI消息。
可选地，第一指示信息包括多组(remote UE ID—所请求的SIB或者SI消息)的内容。relay UE可以根据第一指示信息的内容，即可以明确确定一个或多个remote UE中的每一个remote UE所请求的SIB或者SI消息。其中，每一个remote UE所请求的SIB或者SI消息可以是M个SIB或SI消息中的一个或者多个。
可选地，remote UE的ID可能是remote UE自己分配的ID，并且在单播连接建立过程中告诉了relay UE；或者是relay UE为remote UE分配的临时ID信息，或者也可能是remtoe UE的小区临时标识(如C-RNTI)，本申请实施例对此不作限定。
S320-2，第一终端设备根据第一指示信息，确定所述一个或多个第二终端设备的信息，以及所述M个SIB或SI消息。
S320-3，网络设备向第一终端设备发送所述M个SIB或SI消息。
方式二
S320-4，网络设备向第一终端设备发送第一指示信息，所述第一指示信息用于指示发送所述第一请求消息的一个或多个第二终端设备和请求的所述M个SIB或SI消息。
S320-5，第一终端设备根据第一指示信息，所述一个或多个第二终端设备的信息，以及所述M个SIB或SI消息。
S320-6，第一终端设备监听网络设备周期性广播的所述M个SIB或SI消息。
应理解，方式二和方式一的不同之处在于，gNB向该remote UE对应的relay UE发送该第一指示信息之后，不再主动地向relay UE发送所述M个SIB或SI消息，而是继续周期性向relay UE广播SI，直到relay UE获取了所述M个SIB或SI消息，再执行S320。该方法可以减少信令开销。
方式三
S320-7，网络设备向第一终端设备发送该M个SIB或SI消息，以及第一指示信息，所述第一指示信息用于指示发送所述第一请求消息的一个或多个第二终端设备和请求的所述M个SIB或SI消息。
示例性的，remote UE可以通过RRC信令将第一请求消息直接发给gNB，gNB根据第一请求消息，将第一请求消息通过RRC信令下发给该remote UE对应的relay UE，同时还会携带上该第一指示信息，该第一指示信息用于指示所述M个SIB或SI消息为其下面的哪一个remote UE所请求的。
可选地，该第一指示信息可以是remote UE的ID信息，例如为1bit的指示信息。
应理解，通过上述方式一至方式三中的任意一种方式，relay UE就可以知道一个或多个remote UE请求的M个SIB或SI消息。再执行下述S320-S350的过程：
S320，第一终端设备根据所述N个目标标识通过广播或组播的方式向所述一个或多个第二终端设备发送所述M个SIB或SI消息。
S330，第一终端设备通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息，所述第二消息包括所述M个SIB或SI消息，且所述第二消息包括对应的目标标识。
S340，所述一个或多个第二终端设备接收所述第一终端设备通过广播或组播的方式发送的所述第二消息。
S350，一个或多个第二终端设备向所述第一终端设备发送反馈消息，相应地，所述第一终端设备接收所述反馈消息，其中，所述反馈消息用于指示是否成功接收所述第二消息。第一终端设备可以根据所述反馈消息判断每一个所述第二终端设备是否成功接收所请求的SIB或SI消息。
或者，S350中，一个或多个第二终端设备通过所述第一终端设备的中继，将反馈消息发送给网络设备，由网络设备根据所述反馈消息判断每一个所述第二终端设备是否成功接收所述M个SIB或SI消息。
应理解，该S320-S350的过程可以参照前述方法200的S220-S250的实现过程，为了简便，此处不再赘述。
上述方法可以提供更多的方式，使得relay UE可以获取一个或多个remote UE发送的SI请求，并确定该一个或多个remote UE请求的SI message或SIB，relay UE再结合前述介绍的方式，通过广播或组播的方式该一个或多个remote UE发送SI，提升了SI的发送效率。
以上结合图1至图3对本申请实施例的传输系统信息SI的方法做了详细说明。以下，结合图4至图9对本申请实施例的传输系统信息SI的装置进行详细说明。
图4是本申请实施例提供的一例传输系统信息SI的装置的示意性框图，该装置400可以对应上述方法200和300中描述的第一终端设备(relay UE)，也可以是应用于该第一终端设备(relay UE)的芯片或组件，并且，该装置400中各模块或单元分别用于执行上述方法400中第一终端设备(relay UE)所执行的各动作或处理过程。其中，所述第一终端设备和每个第二终端设备建立侧行链路SL连接，且所述每个第二终端设备通过所述第一终端设备获取目标小区的网络服务，所述目标小区是所述第一终端设备的服务小区。
如图4所示，该通信装置400可以包括：通信单元410和确定单元420。
所述通信单元410用于接收所述一个或多个第二终端设备发送的第一请求消息，所述第一请求消息用于请求获取服务小区的M个系统信息块SIB或系统信息SI消息。
所述确定单元420用于确定所述M个SIB或SI消息对应的N个目标标识，N为大于或等于1的整数且N≤M。
所述通信单元410还用于通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息，所述第二消息包括所述M个SIB或SI消息，且所述第二消息包括对应的目标标识。
一种可能的实现方式中，所述确定单元420还用于确定所述M个SIB或SI消息对应一个相同的目标标识，所述目标标识指示通过广播方式发送所述M个SIB或SI消息。
或者，所述确定单元420还用于所述M个SIB或SI消息中的每一个SIB或SI消息对应不同的目标标识，所述目标标识指示通过组播方式发送所述M个SIB或SI消息。
又或者，所述确定单元420还用于确定所述M个SIB或SI消息中的K个SIB或SI消息对应一个相同的目标标识，1≤K<M，所述目标标识指示通过组播方式发送所述M个SIB或SI消息。
一种可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述目标标识是预设的标识。
另一种可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述第二消息还包括所述第一终端设备的标识。
一种可能的实现方式中，所述通信单元410还用于向所述一个或多个第二终端设备发送第一映射关系的信息，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
一种可能的实现方式中，当所述第一映射关系变化时，所述通信单元410还用于向所述第二终端设备发送更新后的第一映射关系的信息。
或者，当第三终端设备接入所述装置时，所述通信单元410还用于向所述第三终端设备发送所述第一映射关系的信息。
一种可能的实现方式中，当所述确定单元420确定所述M个SIB或SI消息对应的N个目标标识之后，所述通信单元410还用于向所述一个或多个第二终端设备发送所述第二消息对应的目标标识的信息，所述目标标识是所述第一终端设备根据第一映射关系确定的，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
又一种可能的实现方式中，所述通信单元410向所述一个或多个第二终端设备发送所述M个SIB或SI消息之前，还用于接收网络设备周期性广播的所述M个SIB或SI消息。
或者，所述通信单元410还用于向网络设备发送所述第一请求消息，以及接收所述网络设备发送的所述M个SIB或SI消息。
又一种可能的实现方式中，所述通信单元410还具体用于周期性地通过广播或组播的方式向所述一个或多个第二终端设备发送所述M个SIB或SI消息。
可选地，所述第一请求消息是通过无线资源控制RRC信令或媒体访问控制MAC CE信令或侧行链路控制信息SCI发送的。
又一种可能的实现方式中，所述通信单元410还具体用于接收所述一个或多个第二终 端设备发送的反馈消息，所述反馈消息用于指示是否成功接收所述M个SIB或SI消息；以及当所述确定单元420确定每一个第二终端设备都成功接收所述M个SIB或SI消息时，所述通信单元410停止发送所述M个SIB或SI消息。
具体地，该通信单元410用于执行方法200中的S210、S230和S250等过程，该确定单元420用于执行方法200中的S220等过程，或者，该通信单元410用于执行方法300中的S310、S330和S350等过程，该确定单元420用于执行方法300中的S320等过程，各单元执行上述相应步骤的具体过程在方法200和300中已经详细说明，为了简洁，此处不加赘述。
图5是本申请实施例提供的另一例传输系统信息SI的装置的示意性框图，该装置500可以对应(例如，可以应用于或本身即为)上述方法200和300中描述的第二终端设备(remote UE)，并且，该装置500中各模块或单元分别用于执行上述方法200中第二终端设备(remote UE)所执行的各动作或处理过程，其中，所述第一终端设备和每个第二终端设备建立侧行链路SL连接，且所述每个第二终端设备通过所述第一终端设备获取目标小区的网络服务，所述目标小区是所述第一终端设备的服务小区。
如图5所示，该通信装置500可以包括：通信单元510和确定单元520。
该通信单元510用于向所述第一终端设备发送第一请求消息，所述第一请求消息用于请求获取服务小区的M个系统信息块SIB或系统信息SI消息。
该通信单元510还用于接收所述第一终端设备通过广播或组播的方式发送的所述第二消息，所述第二消息包括所述M个SIB或SI消息，所述M个SIB或SI消息对应N个目标标识，且所述第二消息包括对应的目标标识，N为大于或等于1的整数且N≤M。
一种可能的实现方式中，所述M个SIB或SI消息对应一个相同的目标标识，所述目标标识指示所述第一终端设备通过广播方式发送所述M个SIB或SI消息。
或者，所述M个SIB或SI消息中的每一个SIB或SI消息对应不同的目标标识，所述目标标识指示所述第一终端设备通过组播方式发送所述M个SIB或SI消息。
又或者，所述M个SIB或SI消息中的K个SIB或SI消息对应一个相同的目标标识，1≤K<M，所述目标标识指示所述第一终端设备通过组播方式发送所述M个SIB或SI消息。
另一种可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述目标标识是预设的标识。
又一种可能的实现方式中，当所述M个SIB或SI消息对应一个相同的目标标识时，所述M个SIB或SI消息还包括所述第一终端设备的标识，以及该通信单元510还用于接收所述第一终端设备发送的包括所述第一终端设备的标识的所述第二消息；该确定单元520还用于根据所述第二消息，获取对应的SIB或SI消息。
一种可能的实现方式中，该通信单元510还用于接收所述第一终端设备发送的第一映射关系的信息，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
所述确定单元520还用于根据所述第一映射关系的信息，确定接收所述第一终端设备发送的所述第二消息的目标标识；该通信单元510还用于接收所述第一终端设备发送的包括所述目标标识的所述第二消息；所述确定单元520还用于根据所述第二消息，获取对应的SIB或SI消息。
一种可能的实现方式中，当所述第一映射关系变化时，该通信单元510还用于接收所述第一终端设备发送的更新后的第一映射关系的信息；和/或当第三终端设备接入所述第一终端设备时，所述一个或多个第二终端设备接收所述第一终端设备发送的更新后的第一映射关系的信息。
另一种可能的实现方式中，所述通信单元510还用于接收所述第一终端设备发送的所述第二消息中每一个SIB或SI消息对应的目标标识的信息，所述目标标识是所述第一终端设备根据第一映射关系确定的，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
又一种可能的实现方式中，所述通信单元510还具体用于周期性地接收所述第一终端设备通过广播或组播的方式发送的所述第二消息。
可选地，所述第一请求消息是通过无线资源控制RRC信令或媒体访问控制MAC CE信令或侧行链路控制信息SCI发送的。
另一种可能的实现方式中，所述通信单元510还用于向所述第一终端设备发送反馈消息，所述反馈消息用于指示是否成功接收所述M个SIB或SI消息；以及当所述确定单元520确定成功接收所述第二消息时，所述通信单元510停止接收所述第一终端设备发送的所述第二消息。
具体地，该通信单元510用于执行方法200中的S210、S230和S250等过程，该确定单元520用于执行方法200中的S240等过程，或者，该通信单元510用于执行方法300中的S310、S330和S350等过程，该确定单元520用于执行方法300中的S340等过程，各单元执行上述相应步骤的具体过程在方法200和300中已经详细说明，为了简洁，此处不加赘述。
图6是本申请实施例提供的另一例传输系统信息SI的装置的示意性框图，该装置600可以对应(例如，可以应用于或本身即为)上述方法200和300中描述的网络设备(gNB)，并且，该装置600中各模块或单元分别用于执行上述方法200和300中网络设备(gNB)所执行的各动作或处理过程，如图6所示，该通信装置600可以包括：通信单元610和确定单元620。
具体地，确定单元620用于执行方法200中的S220-1等过程，通信单元610用于执行方法200中的S220-2和S220-3等过程，或者，该确定单元620用于执行方法300中的S320-2和S320-5等过程，通信单元610用于执行方法300中的S320-1、S320-3和S320-4、S320-7等过程，各单元执行上述相应步骤的具体过程在方法200和300中已经详细说明，为了简洁，在此不加赘述。
图7是本申请实施例提供的一例终端设备的结构示意图。如图7所示，该终端设备700包括处理器710和收发器720。可选地，该终端设备700还包括存储器730。其中，处理器710、收发器720和存储器730之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器730用于存储计算机程序，该处理器710用于从该存储器730中调用并运行该计算机程序，以控制该收发器720收发信号。
上述处理器710和存储器730可以合成一个处理装置，处理器710用于执行存储器730中存储的程序代码来实现上述方法实施例中第一终端设备(relay UE)的功能。具体实现时，该存储器730也可以集成在处理器710中，或者独立于处理器710。收发器720 可以通过收发电路的方式来实现。
上述终端设备还可以包括天线740，用于将收发器720输出的上行数据或上行控制信令通过无线信号发送出去，或者将下行数据或下行控制信令接收后发送给收发器720进一步处理。
应理解，该终端设备700可对应于根据本申请实施例的方法200或300中的第一终端设备(relay UE)，该终端设备700也可以是应用于第一终端设备(relay UE)的芯片或组件。并且，该终端设备700中的各模块实现方法200或300中的相应流程，各单元执行上述相应步骤的具体过程在方法200或300中已经详细说明，为了简洁，在此不加赘述。
图8是本申请实施例提供的另一例终端设备的结构示意图。如图8所示，该终端设备800包括处理器810和收发器820。可选地，该终端设备800还包括存储器830。其中，处理器810、收发器820和存储器830之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器830用于存储计算机程序，该处理器810用于从该存储器830中调用并运行该计算机程序，以控制该收发器820收发信号。
上述处理器810和存储器830可以合成一个处理装置，处理器810用于执行存储器830中存储的程序代码来实现上述方法实施例中第二终端设备(remote UE)的功能。具体实现时，该存储器830也可以集成在处理器810中，或者独立于处理器810。收发器820可以通过收发电路的方式来实现。
上述终端设备还可以包括天线840，用于将收发器820输出的上行数据或上行控制信令通过无线信号发送出去，或者将下行数据或下行控制信令接收后发送给收发器820进一步处理。
应理解，该终端设备800可对应于根据本申请实施例的方法200或300中的第二终端设备(remote UE)，该终端设备800也可以是应用于第二终端设备(remote UE)的芯片或组件。并且，该终端设备800中的各模块实现方法200或300中的相应流程，各单元执行上述相应步骤的具体过程在方法200或300中已经详细说明，为了简洁，在此不加赘述。
图9是本申请实施例提供的一例网络设备的结构示意图。如图9所示，该网络设备900(例如基站)包括处理器910和收发器920。可选地，该网络设备900还包括存储器930。其中，处理器910、收发器920和存储器930之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器930用于存储计算机程序，该处理器910用于从该存储器930中调用并运行该计算机程序，以控制该收发器920收发信号。
上述处理器910和存储器930可以合成一个处理装置，处理器910用于执行存储器930中存储的程序代码来实现上述方法实施例中基站的功能。具体实现时，该存储器930也可以集成在处理器910中，或者独立于处理器910。收发器920可以通过收发电路的方式来实现。
上述网络设备还可以包括天线940，用于将收发器920输出的下行数据或下行控制信令通过无线信号发送出去，或者将上行数据或上行控制信令接收后发送给收发器820进一步处理。
应理解，该装置900可对应于根据本申请实施例的方法200和300中的基站，该装置900也可以是应用于基站的芯片或组件。并且，该装置900中的各模块实现200和300中的相应流程，各单元执行上述相应步骤的具体过程在方法200和300中已经详细说明，为 了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合的方式来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不加赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合。另一点，所显示或讨论的相互之间的耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接。
另外，在本申请各个实施例中的各功能单元可以集成在一个物理实体中，也可以是各个单元单独对应一个物理实体，也可以两个或两个以上单元集成在一个物理实体中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (24)

  1. 一种传输信息的方法，其特征在于，所述方法应用于包括第一终端设备和一个或多个第二终端设备的系统中，所述第一终端设备和每个第二终端设备建立侧行链路SL连接，且所述每个第二终端设备通过所述第一终端设备获取目标小区的网络服务，所述目标小区是所述第一终端设备的服务小区，所述方法包括：
    所述第一终端设备接收所述一个或多个第二终端设备发送的第一请求消息，所述第一请求消息用于请求获取所述目标小区的M个系统信息块SIB或系统信息SI消息；
    所述第一终端设备确定所述M个SIB或SI消息对应的N个目标标识，N为大于或等于1的整数且N≤M；
    所述第一终端设备通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息，所述第二消息包括所述M个SIB或SI消息，且所述第二消息包括对应的目标标识。
  2. 根据权利要求1所述的方法，其特征在于，所述第一终端设备确定所述M个SIB或SI消息对应的N个目标标识，包括：
    所述第一终端设备确定所述M个SIB或SI消息对应一个相同的目标标识，所述目标标识指示通过广播方式发送所述M个SIB或SI消息；或者
    所述第一终端设备确定所述M个SIB或SI消息中的每一个SIB或SI消息对应不同的目标标识，所述目标标识指示通过组播方式发送所述M个SIB或SI消息；或者
    所述第一终端设备确定所述M个SIB或SI消息中的K个SIB或SI消息对应一个相同的目标标识，1≤K<M，所述目标标识指示通过组播方式发送所述M个SIB或SI消息。
  3. 根据权利要求1或2所述的方法，其特征在于，当所述M个SIB或SI消息对应一个相同的目标标识时，所述目标标识是预设的标识。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，当所述M个SIB或SI消息对应一个相同的目标标识时，所述第二消息还包括所述第一终端设备的标识。
  5. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备向所述一个或多个第二终端设备发送第一映射关系的信息，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    当所述第一映射关系变化时，所述第一终端设备向所述第二终端设备发送更新后的第一映射关系的信息；和/或
    当第三终端设备接入所述第一终端设备时，所述第一终端设备向所述第三终端设备发送所述第一映射关系的信息。
  7. 根据权利要求1或2所述的方法，其特征在于，所述第一终端设备确定所述M个SIB或SI消息对应的N个目标标识之后，所述方法还包括：
    所述第一终端设备向所述一个或多个第二终端设备发送所述第二消息对应的目标标识的信息，所述目标标识是所述第一终端设备根据第一映射关系确定的，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，所述第一终端设备通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息之前，所述方法还包括：
    所述第一终端设备接收网络设备周期性广播的所述M个SIB或SI消息；和/或
    所述第一终端设备向所述网络设备发送所述第一请求消息；
    所述第一终端设备接收所述网络设备发送的所述M个SIB或SI消息。
  9. 根据权利要求1至8中任一项所述的方法，其特征在于，所述第一终端设备通过广播或组播的方式向所述一个或多个第二终端设备发送第二消息，包括：
    所述第一终端设备周期性地向所述一个或多个第二终端设备发送所述第二消息。
  10. 根据权利要求1至9中任一项所述的方法，其特征在于，所述第一请求消息通过无线资源控制RRC信令或媒体访问控制MAC CE信令或侧行链路控制信息SCI发送的。
  11. 根据权利要求1至10中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备接收所述一个或多个第二终端设备发送的反馈消息，所述反馈消息用于指示是否成功接收所述第二消息；
    所述第一终端设备停止发送所述第二消息。
  12. 一种传输信息的方法，其特征在于，所述方法应用于包括第一终端设备和一个或多个第二终端设备的系统中，所述第一终端设备和每个第二终端设备建立侧行链路SL连接，且所述每个第二终端设备通过所述第一终端设备获取目标小区的网络服务，所述目标小区是所述第一终端设备的服务小区，所述方法包括：
    所述一个或多个第二终端设备向所述第一终端设备发送第一请求消息，所述第一请求消息用于请求获取所述目标小区的M个系统信息块SIB或系统信息SI消息；
    所述一个或多个第二终端设备接收所述第一终端设备通过广播或组播的方式发送的所述第二消息，所述第二消息包括所述M个SIB或SI消息，所述M个SIB或SI消息对应N个目标标识，且所述第二消息包括对应的目标标识，N为大于或等于1的整数且N≤M。
  13. 根据权利要求12所述的方法，其特征在于，所述M个SIB或SI消息对应一个相同的目标标识，所述目标标识指示所述第一终端设备通过广播方式发送所述M个SIB或SI消息；或者
    所述M个SIB或SI消息中的每一个SIB或SI消息对应不同的目标标识，所述目标标识指示所述第一终端设备通过组播方式发送所述M个SIB或SI消息；或者
    所述M个SIB或SI消息中的K个SIB或SI消息对应一个相同的目标标识，1≤K<M，所述目标标识指示所述第一终端设备通过组播方式发送所述M个SIB或SI消息。
  14. 根据权利要求12或13所述的方法，其特征在于，当所述M个SIB或SI消息对应一个相同的目标标识时，所述目标标识是预设的标识。
  15. 根据权利要求12至14中任一项所述的方法，其特征在于，当所述M个SIB或SI消息对应一个相同的目标标识时，所述第二消息还包括所述第一终端设备的标识，以及所述方法还包括：
    所述一个或多个第二终端设备接收所述第一终端设备发送的包括所述第一终端设备的标识的所述第二消息；
    根据所述第二消息，获取对应的SIB或SI消息。
  16. 根据权利要求12或13所述的方法，其特征在于，所述方法还包括：
    所述一个或多个第二终端设备接收所述第一终端设备发送的第一映射关系的信息，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系；
    所述一个或多个第二终端设备根据所述第一映射关系的信息，确定接收所述第一终端设备发送的所述第二消息的目标标识；
    所述一个或多个第二终端设备接收所述第一终端设备发送的包括所述目标标识的所述第二消息；
    根据所述第二消息，获取对应的SIB或SI消息。
  17. 根据权利要求16所述的方法，其特征在于，所述方法还包括：
    当所述第一映射关系变化时，所述一个或多个第二终端设备接收所述第一终端设备发送的更新后的第一映射关系的信息；和/或
    当第三终端设备接入所述第一终端设备时，所述第一终端设备向所述第三终端设备发送所述第一映射关系的信息。
  18. 根据权利要求12或13所述的方法，其特征在于，所述方法还包括：
    所述一个或多个第二终端设备接收所述第一终端设备发送的所述第二消息对应的目标标识的信息，所述目标标识是所述第一终端设备根据第一映射关系确定的，所述第一映射关系用于指示所述M个SIB或SI消息和所述N个目标标识之间的对应关系。
  19. 根据权利要求12至18中任一项所述的方法，其特征在于，所述一个或多个第二终端设备接收所述第一终端设备通过广播或组播的方式发送的所述M个SIB或SI消息，包括：
    所述一个或多个第二终端设备周期性地接收所述第一终端设备通过广播或组播的方式发送的所述M个SIB或SI消息。
  20. 根据权利要求12至19中任一项所述的方法，其特征在于，所述第一请求消息通过无线资源控制RRC信令或媒体访问控制MAC CE信令或侧行链路控制信息SCI发送的。
  21. 根据权利要求12至20中任一项所述的方法，其特征在于，所述方法还包括：
    所述一个或多个第二终端设备向所述第一终端设备发送反馈消息，所述反馈消息用于指示是否成功接收所述第二消息；
    所述一个或多个第二终端设备停止接收所述第一终端设备发送的所述第二消息。
  22. 一种传输信息的装置，其特征在于，包括处理器和存储器，所述处理器与所述存储器耦合，所述存储器用于存储计算机程序或指令，所述处理器用于执行存储器中的所述计算机程序或指令，使得权利要求1至21中任一项所述的方法被执行。
  23. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被执行时，实现如权利要求1至21任意一项所述的方法。
  24. 一种芯片系统，其特征在于，所述芯片系统包括：
    存储器，用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得安装有所述芯片系统的装置执行如权利要求1至21中任意一项所述的方法。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110945936A (zh) * 2017-05-04 2020-03-31 弗劳恩霍夫应用研究促进协会 Ue组，ue组管理者ue和ue组成员ue
WO2021064183A1 (en) * 2019-10-04 2021-04-08 Nokia Technologies Oy Sidelink advanced notification
WO2021134162A1 (en) * 2019-12-30 2021-07-08 Mediatek Singapore Pte. Ltd. Methods and apparatus of system information delivery for sidelink relay
WO2022022208A1 (en) * 2020-07-30 2022-02-03 Telefonaktiebolaget Lm Ericsson (Publ) Terminal device, network node and methods therein for handling system information

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110945936A (zh) * 2017-05-04 2020-03-31 弗劳恩霍夫应用研究促进协会 Ue组，ue组管理者ue和ue组成员ue
WO2021064183A1 (en) * 2019-10-04 2021-04-08 Nokia Technologies Oy Sidelink advanced notification
WO2021134162A1 (en) * 2019-12-30 2021-07-08 Mediatek Singapore Pte. Ltd. Methods and apparatus of system information delivery for sidelink relay
WO2022022208A1 (en) * 2020-07-30 2022-02-03 Telefonaktiebolaget Lm Ericsson (Publ) Terminal device, network node and methods therein for handling system information

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZTE: "Summary document of AI 8.7.4.1", 3GPP DRAFT; R2-2104503, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. electronic; 20210412 - 20210420, 12 April 2021 (2021-04-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051995185 *

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