WO2022104679A1 - 一种中继终端装置选择的方法、数据传输的方法以及装置 - Google Patents

一种中继终端装置选择的方法、数据传输的方法以及装置 Download PDF

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Publication number
WO2022104679A1
WO2022104679A1 PCT/CN2020/130369 CN2020130369W WO2022104679A1 WO 2022104679 A1 WO2022104679 A1 WO 2022104679A1 CN 2020130369 W CN2020130369 W CN 2020130369W WO 2022104679 A1 WO2022104679 A1 WO 2022104679A1
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Prior art keywords
terminal device
relay terminal
measurement
target
communication
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PCT/CN2020/130369
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English (en)
French (fr)
Inventor
刘荣宽
张鹏
许华
彭文杰
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华为技术有限公司
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Priority to PCT/CN2020/130369 priority Critical patent/WO2022104679A1/zh
Publication of WO2022104679A1 publication Critical patent/WO2022104679A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method for selecting a relay terminal device, a method and a device for data transmission.
  • D2D Device-to-device
  • the application of D2D technology can reduce the burden of cellular networks, reduce battery power consumption of user equipment, increase data rates, and can well meet the needs of proximity services.
  • the D2D technology allows multiple D2D-enabled user equipments (User Equipment, UE) to perform direct discovery and direct communication with or without network infrastructure.
  • UE User Equipment
  • Wireless relay communication is a form of wireless communication networking, which can effectively expand the coverage of the network, in which there may be one or more relay nodes to forward the data in the transmission from the source to the sink.
  • it may include UE-to-Network relay transmission and UE-to-UE relay transmission from user equipment to user equipment.
  • Sidelink is usually required in relay transmission.
  • the sidelink relay terminal device selection/reselection mechanism needs to use the Physical Sidelink Discovery Channel (PSDCH) and The sidelink discovery reference signal received power (Sidelink Discovery Reference Signal Received Power, SD-RSRP) measurement result is used for relay terminal device selection/reselection.
  • PSDCH Physical Sidelink Discovery Channel
  • SD-RSRP Sidelink Discovery Reference Signal Received Power
  • the embodiments of the present application provide a method for selecting a relay terminal device, a method and a device for data transmission, which are used in the fields of D2D, V2X, Internet of Vehicles, intelligent driving or assisted driving, etc., when no PDSCH is available.
  • Relay terminal device selection thereby improving the reliability of relay terminal device selection.
  • the present application provides a method for selecting a relay terminal device.
  • the method may be executed by a terminal device, or may also be executed by a chip configured in the terminal device, which is not limited in this application.
  • the method includes: the terminal device is on at least one channel in a Physical Sidelink Control Channel (Physical Sidelink Control Channel, PSCCH) and a Physical Sidelink Shared Channel (Physical Sidelink Shared Channel, PSSCH), for N relay terminals
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • the first measurement quantity of the device is measured to obtain a first measurement result set, N is a positive integer, the PSSCH is indicated by the PSCCH, and then M pieces of discovery indication information are received from the N relay terminal apparatuses, and the M pieces of discovery indication information are used for Indicates that M relay terminal devices in the N relay terminal devices are M first candidate relay terminal devices, and M is less than or equal to N, and M is a positive integer, and then measure one of the first measurement result sets.
  • the first measurement result is filtered to obtain a first filter result set, and then a first target relay terminal device is selected from the M first candidate relay terminal devices according to the first filter result set.
  • the terminal device may filter the latest first measurement result in the first measurement result set to obtain the first filter result set, and according to the selection from the M first candidate relay terminal devices Select the first target relay terminal device.
  • the terminal device selects the first filter results from the plurality of first filter result sets.
  • the result set determines the latest obtained first filter result set for selecting the first target relay terminal device.
  • the specific manner of acquiring the first filtering result set is not limited here.
  • the first measurement quantity is PSCCH physical sidelink control channel reference signal received power (Physical Sidelink Control Channel Reference Signal Received Power, PSCCH-RSRP), or, the first measurement The amount is the physical sidelink shared channel reference signal received power (Physical Sidelink Shared Channel Reference Signal Received Power, PSSCH-RSRP) of the PSSCH indicated by the PSCCH, or the first measurement amount is the PSCCH and the PSSCH indicated by the PSCCH.
  • the linear average value of the resource element (Resource Element, RE) power occupied by all demodulation reference signals (Demodulation Reference Signal, DMRS), or the first measurement quantity is the PSCCH-RSRP of the PSCCH and the PSSCH-RSRP of the PSSCH indicated by the PSCCH Weighted average of RSRP.
  • the first measurement quantity may be a different measurement quantity related to at least one of PSCCH or PSSCH, thereby improving the flexibility of measuring the first measurement quantity.
  • At least one item in the PSSCH is related, so the first measurement result set obtained by the terminal device measuring on at least one channel of the PSCCH and the PSSCH can be more accurate, thereby improving the accuracy of the subsequent determination of the first filtering result set and improving the selection of the first target. Accuracy of the relay terminal device.
  • the weighted average coefficient of the weighted average is configured by the network device, or, pre-configured, or, the first preset value.
  • the weighted average coefficient of the weighted average can be configured or set in different ways. , to improve the flexibility of the first measurement quantity, thereby improving the flexibility of this solution.
  • the terminal device receives PSSCHs indicated by N PSCCHs, wherein M PSSCHs in the N PSSCHs carry discovery indication information.
  • a method for receiving the discovery indication information in which there is at least one PSSCH in the PSSCH indicated by the PSCCH received by the terminal device that carries the discovery indication information, that is, the terminal device can determine that the discovery indication information is received by This enhances the feasibility of this scheme.
  • the terminal device receives N sidelink sidelink control information (Sidelink Sidelink Control Information, SL SCI), wherein M SL SCIs in the N SL SCIs include display indications field, the display indication field is used to indicate that M relay terminal apparatuses among the N relay terminal apparatuses are M first candidate relay terminal apparatuses.
  • the display indication field can be indicated by 1 bit in the SL SCI. When the value of the display indication field of 1 bit is 1, it can be determined that the SL SCI is used for the discovery function of the relay terminal device, that is, the terminal device can determine according to the discovery indication information.
  • the relay terminal device that sends the SL SCI is the first candidate relay terminal device.
  • the terminal device can determine that the relay terminal device sending the SL SCI is not the first candidate relay terminal device according to the indication information.
  • the terminal device receives N SL SCIs, wherein M SL SCIs in the N SL SCIs include a descrambling field, and the descrambling field is used to indicate that M relay terminal devices in the N relay terminal devices are M
  • the descrambling field is obtained by descrambling the field in the SL SCI.
  • the implicit indication field can be indicated by descrambling with 1 bit in the SL SCI.
  • the terminal device can determine, according to the discovery indication information, that the relay terminal device that sends the SL SCI is the first candidate relay terminal device. Secondly, when the descrambling field is 0 obtained after the last 1 bit of descrambling, it can be determined that the SL SCI is used for the communication function based on the descrambling field, that is, the terminal device can determine according to the indication information that the relay terminal device sending the SL SCI is not the first standby device. Select the relay terminal device.
  • another method of receiving discovery indication information is provided, and there is at least one SL SCI in the SL SCI received by the terminal device that carries a display indication field, that is, the terminal device can determine that the discovery indication information is received, or, In the SL SCI received by the terminal device, there is at least one SL SCI that carries a descrambling field, and the terminal device can also determine that the discovery indication information is received. This enhances the feasibility of the solution and enhances the flexibility of the solution.
  • the SL SCI includes the first stage side link side row control information 1st stage SCI and/or the second stage side link side row control information 2nd stage SCI.
  • the terminal device can receive the discovery indication information through the 1st stage SCI, or receive the discovery indication information through the 2nd stage SCI, or through the 1st stage SCI and the 2nd stage SCI.
  • the stage SCI receives discovery indication information, thereby improving the flexibility of this scheme.
  • the terminal device caches the first measurement result set in the physical layer, so when the terminal device receives M pieces of discovery indication information from N relay terminal devices, Obtain a first set of measurement results.
  • the terminal device caches the first set of measurement results in the physical layer, so when the terminal device receives M pieces of discovery indication information from N relay terminal devices, it obtains the first set of measurement results from the physical layer, and then The first set of measurement results is filtered to obtain the first set of filtering results.
  • the terminal device does not receive the discovery indication information, no filtering process is performed, thereby reducing the processing power of the terminal device and further reducing the power consumption of this solution.
  • the terminal device may continuously filter multiple first measurement results in the first measurement result set, so as to obtain multiple first measurement results. filter result set, and then cache multiple filter result sets to the upper layer, and when the terminal device receives the discovery indication information, directly obtain the latest first filter result set from the higher layer.
  • the high layer introduced in this implementation manner may be layer two (Layer 2, L2) or layer three (Layer 3, L3), which is not specifically limited here. Specifically, L2 is the MAC layer, and L3 is the RRC layer.
  • the terminal device caches the first set of filtering results to the upper layer, so when the terminal device receives M pieces of discovery indication information from N relay terminal devices, it directly obtains the first set of filtering results from the higher layer, thereby improving the present invention. program reliability.
  • the cache time corresponding to the cache is configured by the network device, or is pre-configured, or is a second preset value.
  • the cache time corresponding to the cache includes a minimum value, which is used to indicate the shortest time that the first measurement result set can be stored in the physical layer. In this case, if the cache time is 50 milliseconds (ms), that is, Indicates that the first set of measurement results needs to be stored at the physical layer for at least 50ms.
  • the cache time corresponding to the cache includes a maximum value, which is used to indicate the longest time that the first measurement result set can be stored in the physical layer.
  • the cache time corresponding to the cache includes a minimum value and a maximum value, and the maximum value and the minimum value can indicate the time range in which the first measurement result set is stored in the physical layer.
  • the minimum value of the buffering time is 50ms
  • the maximum value of the buffering time is 500ms, which indicates that the first measurement result set can be stored in the physical layer for 50ms to 500ms.
  • the cache time corresponding to the cache can be determined in different ways to improve the feasibility of this solution. Secondly, by including the maximum value and/or the minimum value of the cache time, the storage range of the cache time can be determined to avoid the terminal. The device saves the first measurement result set for a long time during the caching process, which occupies unnecessary memory and improves the memory utilization of the terminal device.
  • the terminal device determines the first filtering result with the largest filtering value in the first filtering result set as the first target filtering result, and selects the first filtering result from the M first candidate relay terminals
  • the first candidate relay terminal device corresponding to the first target filtering result is determined as the first target relay terminal device.
  • the terminal device selects the relay terminal device that satisfies the relay terminal device candidate criteria and has the best PC5 link quality as the first target relay terminal device.
  • the PC5 link quality is measured by the first filtering result set, and the first filtering result corresponding to the best PC5 link quality has the largest filtering value.
  • a method for determining the first target relay terminal device is provided. Since the filter value of the first filter result corresponding to the best PC5 link quality is the largest, the first filter result with the largest filter value corresponds to The first candidate relay terminal device is determined to be the first target relay terminal device, that is, the PC5 link quality of the first target relay terminal device is the best, which can better establish communication with the terminal device and transmit data, thereby improving the feasibility and reliability of the scheme.
  • the terminal device obtains M first filtering results corresponding to the M first candidate relay terminal devices from the first filtering result set, and when the M first filtering results are among the M first filtering results If there is a second target filtering result greater than the first threshold, the terminal device determines that the first candidate relay terminal device corresponding to the second target filtering result is the first target relay terminal device.
  • the first threshold is q-RxLevMin, and when the terminal device is in the coverage (in coverage) state, the first threshold is included in the reselectionInfoIC field of the radio resource control layer (Radio Resource Control, RRC) signaling, and secondly, the terminal device In the out of coverage state, the first threshold is included in the reselectionInfoOoC of the RRC signaling.
  • RRC Radio Resource Control
  • the first target relay terminal device is determined by comparison with a first threshold value, and when the terminal device is in different states, the first threshold value includes In different fields, from enhancing the flexibility of this scheme.
  • the terminal device is in the sidelink second mode SL Mode 2, and the terminal device can perform resource sensing according to the first measurement result set.
  • the terminal device when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result The set obtains the first set of filtering results, thereby improving the feasibility of the present solution.
  • the terminal device is a terminal device whose service frequency for sidelink SL communication is out of coverage, or the terminal device is a service frequency used for SL communication and resides on A terminal device whose received power measurement of the cell or primary cell is lower than a second threshold value, the second threshold value being threshHigh, and the second threshold value being preconfigured.
  • the terminal device since the terminal device is a terminal device that satisfies at least one of the above conditions, the terminal device becomes a remote UE (remote UE) or a source UE, that is, enters a remote UE state or a source UE state. Therefore, the terminal device is in the relay UE discovery phase, and can receive the PSCCH sent by N relay terminal devices and the PSSCH indicated by the PSCCH, so that the terminal device can perform measurement on at least one channel of the PSCCH and the PSSCH. Feasibility of this improvement plan.
  • the discovery indication information is an announcement message, a response message, a direct communication accept message, a field of the sidelink media intervention control layer control unit SL MAC CE or an indication field of the SL MAC CE. either.
  • the terminal device can determine that the discovery indication information is received from various forms of messages, fields or indication fields, thereby improving the flexibility of the solution.
  • the present application provides a method for data transmission.
  • the method may be executed by the relay terminal device, or may also be executed by a chip configured in the relay terminal device, which is not limited in this application.
  • the method includes: the relay terminal device sends discovery indication information to the terminal device, where the discovery indication information is used to indicate that the relay terminal device is the first candidate relay terminal device, and when the terminal device selects the relay terminal device as the first target When relaying the terminal device, the relay terminal device transmits the data sent by the terminal device to the target device, wherein the first target relay terminal device is selected from the M first candidate relay terminal devices according to the first filtering result set , the first filter result set is obtained by filtering a first measurement result in the first measurement result set, and the first measurement result set is obtained in the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH On at least one channel, N and M are both positive integers obtained by measuring the first measurement quantities of N relay terminal devices, and M is less than or equal to N.
  • the selected relay terminal device can establish a communication connection with the terminal device, so as to transmit the terminal device transmission to the target device. data, thereby improving the reliability of data transmission.
  • the first measurement quantity is PSCCH-RSRP of PSCCH, or, the first measurement quantity is PSSCH-RSRP of PSSCH indicated by PSCCH, or the first measurement quantity is PSCCH and this
  • the linear average of the RE power occupied by all DMRSs on the PSSCH indicated by the PSCCH, or the first measurement quantity is the weighted average of the PSCCH-RSRP of the PSCCH and the PSSCH-RSRP of the PSSCH indicated by the PSCCH.
  • the first measurement quantity may be a different measurement quantity related to at least one of PSCCH or PSSCH, thereby improving the flexibility of measuring the first measurement quantity.
  • At least one item in the PSSCH is related, so the first measurement result set obtained by the terminal device measuring on at least one channel of the PSCCH and the PSSCH can be more accurate, thereby improving the accuracy of the subsequent determination of the first filtering result set and improving the selection of the first target. Accuracy of the relay terminal device.
  • the weighted average coefficient of the weighted average is configured by the network device, or, pre-configured, or, the first preset value.
  • the weighted average coefficient of the weighted average can be configured or set in different ways. , to improve the flexibility of the first measurement quantity, thereby improving the flexibility of this solution.
  • the relay terminal device sends a PSSCH indicated by the PSCCH to the terminal device, where the PSSCH carries discovery indication information.
  • a method for receiving discovery indication information is provided, and there is at least one PSSCH in the PSSCH indicated by the PSCCH sent by the relay terminal device that carries the discovery indication information, so that the terminal device can determine that the discovery indication information is received , thereby enhancing the feasibility of the scheme.
  • the relay terminal device sends an SL SCI to the terminal device, where the SL SCI includes a display indication field, and the display indication field is used to indicate that the relay terminal device is the first candidate relay terminal device , or, the relay terminal device sends the SL SCI to the terminal device, where the SL SCI includes a descrambling field, the descrambling field is used to indicate that the relay terminal device is the first candidate relay terminal device, and the descrambling field is a response to the SL SCI obtained by descrambling the fields in .
  • another method of receiving the discovery indication information is provided, and there is at least one SL SCI in the SL SCI sent by the relay terminal device that carries the display indication field, so that the terminal device can determine that the discovery indication information is received , or, in the SL SCI sent by the terminal device, there is at least one SL SCI that carries a descrambling field, so that the terminal device can determine that the discovery indication information has been received, so that it can judge whether the discovery indication information is received based on the display indication field and the descrambling field. Indicative information, thereby improving the feasibility of the scheme and improving the flexibility of the scheme.
  • the SL SCI includes a 1st stage SCI and/or a 2nd stage SCI.
  • the terminal device can receive the discovery indication information through the 1st stage SCI, or receive the discovery indication information through the 2nd stage SCI, or through the 1st stage SCI and the 2nd stage SCI.
  • the stage SCI receives discovery indication information, thereby improving the flexibility of this scheme.
  • the first target relay terminal device is a first candidate relay terminal device corresponding to the first target filtering result
  • the first target filtering result is the filtering result in the first filtering result set The first filter result with the largest value.
  • the PC5 link quality is measured by the first filtering result set, and the first filtering result corresponding to the best PC5 link quality has the largest filtering value.
  • the filter value of the first filter result corresponding to the best PC5 link quality is the largest
  • the first candidate relay terminal device corresponding to the first filter result with the largest filter value is determined to be in the first target
  • the PC5 link quality of the relay terminal device, that is, the first target relay terminal device is the best, so the relay terminal device can better establish communication with the terminal device and transmit data, thereby improving the feasibility and reliability of the solution.
  • the first target relay terminal device is the first candidate relay terminal device corresponding to the second target filtering result, and the second target filtering result is greater than the first threshold.
  • the first threshold is q-RxLevMin, and when the terminal device is in the coverage (in coverage) state, the first threshold is included in the reselectionInfoIC field of the radio resource control layer (Radio Resource Control, RRC) signaling, and secondly, the terminal device In the out of coverage state, the first threshold is included in the reselectionInfoOoC of the RRC signaling.
  • RRC Radio Resource Control
  • the first target relay terminal device is determined by comparison with the first threshold, and when the terminal device is in different states, the first threshold is included in different fields, thereby improving the flexibility of the solution.
  • the terminal device is a terminal device whose service frequency for sidelink SL communication is out of coverage, or the terminal device is a service frequency used for SL communication and resides on A terminal device whose received power measurement of the cell or primary cell is lower than a second threshold value, the second threshold value being threshHigh, and the second threshold value being preconfigured.
  • the terminal device since the terminal device is a terminal device that satisfies at least one of the above conditions, the terminal device becomes a remote UE (remote UE) or a source UE, that is, enters a remote UE state or a source UE state. Therefore, the terminal device is in the discovery phase of the relay UE, and the relay terminal device can send the PSCCH and the PSSCH indicated by the PSCCH to the terminal device, so that the terminal device can perform measurement on at least one channel of the PSCCH and the PSSCH, thereby Improve the feasibility of the program.
  • the terminal device since the terminal device is a terminal device that satisfies at least one of the above conditions, the terminal device becomes a remote UE (remote UE) or a source UE, that is, enters a remote UE state or a source UE state. Therefore, the terminal device is in the discovery phase of the relay UE, and the relay terminal device can send the PSCCH and the PSSCH indicated by the PSCCH to the terminal device,
  • the discovery indication information is an announcement message, a response message, a direct communication accept message, a field of the sidelink media intervention control layer control unit SL MAC CE or an indication field of the SL MAC CE. either.
  • the relay terminal device can carry the discovery indication information from various forms of messages, fields or indication fields, thereby improving the flexibility of this solution.
  • the target device transmission includes a receiving terminal device and/or a network device.
  • the receiving terminal device is a destination UE (destination UE). Specifically, if it is applied to the UE-to-Network relay transmission scenario, the relay terminal device transmits data to the network device. -UE relay) transmission scenario, the relay terminal device transmits data to the receiving terminal device.
  • the relay terminal device transmits data sent by the terminal device to the receiving terminal device and/or the network device based on the application scenario and the system to improve the feasibility of this solution.
  • a communication device has part or all of the functions for implementing the first aspect and the terminal device described in any possible implementation manner of the first aspect.
  • the function of the device may have the function of some or all of the embodiments of the terminal device in this application, and may also have the function of independently implementing any one of the embodiments of this application.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the structure of the communication device may include a processing module and a communication module, and the processing module is configured to support the communication device to perform the corresponding functions in the above method.
  • the communication module is used to support communication between the communication device and other devices.
  • the communication device may further include a storage module for coupling with the processing module and the communication module, which stores necessary program instructions and data for the communication device.
  • the communication device includes:
  • the processing module is configured to measure the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH to obtain a first measurement result set , where N is a positive integer;
  • a transceiver module configured to receive M pieces of discovery indication information from N relay terminal apparatuses, wherein the M pieces of discovery indication information are used to indicate that M relay terminal apparatuses in the N relay terminal apparatuses are M first candidates Relay terminal device, M is less than or equal to N, and M is a positive integer;
  • the processing module is further configured to select the first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set, wherein the first filtering result set is a result of the first measurement result set.
  • a first measurement is obtained by filtering.
  • the processing module may be a processor or a processing unit
  • the transceiver module may be a transceiver
  • the storage module may be a memory or a storage unit.
  • the communication device may include:
  • a processor configured to measure the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain a first measurement result set , where N is a positive integer;
  • a transceiver configured to receive M pieces of discovery indication information from N relay terminal apparatuses, wherein the M pieces of discovery indication information are used to indicate that M relay terminal apparatuses in the N relay terminal apparatuses are M first candidates Relay terminal device, M is less than or equal to N, and M is a positive integer;
  • the processor is further configured to select a first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set, wherein the first filtering result set is a result of the first measurement result set.
  • a first measurement is obtained by filtering.
  • the processor may be used to perform, for example but not limited to, baseband related processing
  • the transceiver may be used to perform, for example but not limited to, radio frequency transceiving.
  • the above-mentioned devices may be respectively arranged on chips that are independent of each other, or at least part or all of them may be arranged on the same chip.
  • processors can be further divided into analog baseband processors and digital baseband processors.
  • the analog baseband processor can be integrated with the transceiver on the same chip, and the digital baseband processor can be set on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip.
  • a digital baseband processor can be integrated with a variety of application processors (such as but not limited to graphics processors, multimedia processors, etc.) on the same chip.
  • application processors such as but not limited to graphics processors, multimedia processors, etc.
  • Such a chip may be called a System on Chip. Whether each device is independently arranged on different chips or integrated on one or more chips often depends on the needs of product design. The embodiments of the present application do not limit the implementation form of the foregoing device.
  • a communication apparatus including a processor.
  • the processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in any one of the possible implementations of the first aspect above.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, the processor is coupled to the communication interface, the communication interface is used for inputting and/or outputting information, and the information includes at least one of instructions and data.
  • the communication device is a terminal device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the communication device is a chip or a chip system configured in the terminal device.
  • the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, and the like.
  • the processor may also be embodied as a processing circuit or a logic circuit.
  • a communication device has part or all of the functions of the relay terminal device described in the second aspect and any possible implementation manner of the second aspect.
  • the function of the device may have the function of some or all of the embodiments of the relay terminal device in this application, and may also have the function of independently implementing any one of the embodiments of this application.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the structure of the communication device may include a processing module and a transceiver module, and the processing module is configured to support the communication device to perform the corresponding functions in the above method.
  • the transceiver module is used to support communication between the communication device and other devices.
  • the communication device may further include a storage module, which is used for coupling with the processing module and the transceiver module, and stores necessary program instructions and data of the communication device.
  • the communication device includes:
  • a transceiver module configured to send discovery indication information to the terminal device, wherein the discovery indication information is used to indicate that the communication device is the first candidate relay terminal device;
  • the transceiver module is further configured to transmit the data sent by the terminal device to the target device when the terminal device selects the communication device as the first target relay terminal device, wherein the first target relay terminal device is based on the first filtering result set from the Selected from the M first candidate relay terminal devices, the first filter result set is obtained by filtering one first measurement result in the first measurement result set, and the first measurement result set is obtained on the physical side link
  • the first measurement quantities of N communication devices are measured and obtained, N and M are both positive integers, and M is less than or equal to N.
  • the processing module may be a processor or a processing unit
  • the transceiver module may be a transceiver
  • the storage module may be a memory or a storage unit.
  • the communication device may include:
  • a transceiver configured to send discovery indication information to the terminal device, wherein the discovery indication information is used to indicate that the communication device is the first candidate relay terminal device;
  • the transceiver is further configured to transmit the data sent by the terminal device to the target device when the terminal device selects the communication device as the first target relay terminal device, wherein the first target relay terminal device is based on the first filter result set from the Selected from the M first candidate relay terminal devices, the first filter result set is obtained by filtering one first measurement result in the first measurement result set, and the first measurement result set is obtained on the physical side link
  • the first measurement quantities of N communication devices are measured and obtained, N and M are both positive integers, and M is less than or equal to N.
  • a communication apparatus including a processor.
  • the processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in any of the possible implementations of the second aspect above.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, the processor is coupled to the communication interface, the communication interface is used for inputting and/or outputting information, and the information includes at least one of instructions and data.
  • the communication device is a relay terminal device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the communication device is a chip or a chip system configured in the relay terminal device.
  • the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, and the like.
  • the processor may also be embodied as a processing circuit or a logic circuit.
  • a processor including: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any one of the possible implementations of the first aspect and the second aspect.
  • the above-mentioned processor may be a chip
  • the input circuit may be an input pin
  • the output circuit may be an output pin
  • the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver
  • the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter
  • the circuit can be the same circuit that acts as an input circuit and an output circuit at different times.
  • the embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.
  • a communication apparatus including a communication interface and a processor.
  • the communication interface is coupled with the processor.
  • the communication interface is used to input and/or output information.
  • the information includes at least one of instructions and data.
  • the processor is configured to execute a computer program to cause the communication device to perform the method in any of the possible implementations of the first aspect and the second aspect.
  • processors there are one or more processors and one or more memories.
  • a communication device including a processor and a memory.
  • the processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter, so that the apparatus performs the method in any one of the possible implementations of the first aspect and the second aspect.
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • the memory can be a non-transitory memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be separately set in different On the chip, the embodiment of the present application does not limit the type of the memory and the setting manner of the memory and the processor.
  • ROM read only memory
  • sending indication information may be a process of outputting indication information from the processor
  • receiving indication information may be a process of inputting received indication information to the processor.
  • the information output by the processing can be output to the transmitter, and the input information received by the processor can be from the receiver.
  • the transmitter and the receiver may be collectively referred to as a transceiver.
  • the communication device in the eighth aspect and the ninth aspect may be a chip, and the processor may be implemented by hardware or software.
  • the processor When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when When implemented by software, the processor can be a general-purpose processor, and is implemented by reading software codes stored in a memory, which can be integrated in the processor or located outside the processor and exist independently.
  • a computer program product comprising: a computer program (also referred to as code, or instructions), which, when the computer program is executed, causes a computer to execute the first aspect and the first aspect above.
  • a computer program also referred to as code, or instructions
  • the method in any possible implementation manner of the two aspects.
  • a computer-readable storage medium stores a computer program (also referred to as code, or instruction) when it runs on a computer, causing the computer to execute the above-mentioned first A method of any possible implementation of the aspect and the second aspect.
  • a computer program also referred to as code, or instruction
  • a communication system including the aforementioned terminal device and the relay terminal device.
  • the present application provides a chip system, the chip system includes a processor and an interface, the interface is used to obtain a program or an instruction, and the processor is used to call the program or instruction to implement or support a terminal device To implement the functions involved in the first aspect, for example, to determine or process at least one of the data and information involved in the above method.
  • the chip system further includes a memory for storing necessary program instructions and data of the terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a chip system, the chip system includes a processor and an interface, the interface is used to obtain a program or an instruction, and the processor is used to call the program or instruction to implement or support relaying
  • the terminal device implements the functions involved in the second aspect, for example, determining or processing at least one of the data and information involved in the above method.
  • the chip system further includes a memory for storing necessary program instructions and data of the relay terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the terminal device measures the first measurement quantities of N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, and obtains The first set of measurement results, and then receive M pieces of discovery indication information from N relay terminal apparatuses, where the M pieces of discovery indication information are used to indicate that M relay terminal apparatuses in the N relay terminal apparatuses are M first candidates
  • the relay terminal device finally selects the first target relay terminal device from the M first candidate relay terminal devices according to the first filter result set obtained by filtering the first measurement result set, thereby completing the D2D field, In the fields of V2X, Internet of Vehicles, intelligent driving or assisted driving, if no PDSCH is available, select the relay terminal device.
  • FIG. 1 is a schematic diagram of a system framework in an embodiment of the application.
  • FIG. 2 is a schematic diagram of the architecture of a relay transmission system from user equipment to a network in an embodiment of the present application;
  • FIG. 3 is a schematic diagram of the architecture of a relay transmission system from user equipment to user equipment in an embodiment of the present application
  • FIG. 6 is a schematic diagram of a direct communication process in an embodiment of the present application.
  • FIG. 7 is a schematic diagram of an embodiment of a method for selecting a relay terminal device in an embodiment of the present application.
  • FIG. 8 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application.
  • FIG. 10 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application.
  • FIG. 11 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application.
  • FIG. 12 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application.
  • FIG. 13 is a schematic diagram of an embodiment of a communication device in an embodiment of the present application.
  • FIG. 14 is a schematic diagram of another embodiment of the communication device in the embodiment of the present application.
  • 15 is a schematic block diagram of a communication device in an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: LTE system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile communication system (universal mobile telecommunication system, UMTS).
  • LTE system LTE frequency division duplex (FDD) system
  • LTE time division duplex (TDD) LTE time division duplex
  • UMTS universal mobile communication system
  • 5G fifth generation
  • NR new radio
  • future networks such as 6G systems or even future systems
  • M2M machine to machine
  • the network device in the communication system can be any device with a wireless transceiver function or a chip that can be provided in the device, and the device includes but is not limited to: an evolved Node B (evolved Node B, eNB), Radio Network Controller (RNC), Node B (Node B, NB), Base Station Controller (Base Station Controller, BSC), Base Transceiver Station (Base Transceiver Station, BTS), home base station (such as , Home evolved NodeB, or Home Node B, HNB), baseband unit (BaseBand Unit, BBU), wireless fidelity (Wireless Fidelity, WIFI) system in the access point (Access Point, AP), wireless relay node, wireless The backhaul node, transmission point (TP) or transmit and receive point (TRP), etc., can also be devices used in 5G, 6G and even future systems, such as base stations (gNodeB or gNB) or transceiver points ( transmission receiving point/transmission receiving point, TRP), etc., can
  • the base station can be: a macro base station, a micro base station, a pico base station, a small base station, a relay station, or a balloon station.
  • it can also be a network node that constitutes a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), or a picocell (Picocell), or a femtocell (Femtocell), or, Vehicle to everything (V2X) or roadside unit (RSU) in intelligent driving scenarios.
  • BBU baseband unit
  • DU distributed unit
  • Picocell picocell
  • Femtocell femtocell
  • V2X Vehicle to everything
  • RSU roadside unit
  • Multiple base stations may support the above-mentioned networks of the same technology, or may support the above-mentioned networks of different technologies.
  • a base station may contain one or more co-sited or non-co-sited TRPs.
  • the network device may also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario.
  • the network device may also be a server, a wearable device, or a vehicle-mounted device.
  • the following description takes the network device as the base station as an example.
  • the multiple network devices may be base stations of the same type, or may be base stations of different types.
  • the base station may communicate with the terminal apparatus, or may communicate with the terminal apparatus through the relay station.
  • the terminal device can communicate with multiple base stations of different technologies.
  • the terminal device can communicate with the base station supporting the LTE network, and can also communicate with the base station supporting the 5G network, and can also support communication with the base station of the LTE network and the base station of the 5G network. Dual connection.
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include a radio unit (RU).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU implements the functions of the radio resource control (RRC) layer and the packet data convergence protocol (PDCP) layer
  • the DU implements the functions of the radio resource control (RRC) layer.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • the network device may be a CU node, a DU node, or a device including a CU node and a DU node.
  • the CU may be divided into network devices in the access network RAN, and the CU may also be divided into network devices in the core network CN, which is not limited herein.
  • the device for implementing the function of the network device may be a network device; it may also be a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device.
  • the terminal device in the communication system is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); It can also be deployed in the air (eg on airplanes, balloons, satellites, etc.).
  • the terminal can be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, industrial control (industrial) wireless terminals in control), in-vehicle terminal equipment, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ), wireless terminals in smart cities, wireless terminals in smart homes, wearable terminal devices, wireless terminals in the aforementioned V2X Internet of Vehicles or RSUs of the wireless terminal type, etc. .
  • the embodiments of the present application do not limit application scenarios.
  • a terminal device may also sometimes be referred to as terminal equipment, UE, access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, Wireless communication equipment, UE proxy or UE device, etc.
  • Terminals can also be stationary or mobile.
  • FIG. 1 is a schematic diagram of a system framework in an embodiment of the application. As shown in FIG. 1 , in (A) of FIG.
  • the communication system in this scenario includes a terminal device A, a terminal device B, and a network device.
  • the terminal device A needs to search for the relay terminal device, and communicate with the network device through the selected relay terminal device (for example, the terminal device B).
  • the communication system in this scenario includes a terminal device A, a terminal device B and a terminal device C, wherein the terminal device A needs to search for a relay terminal device, and through the selected relay terminal device (For example, the terminal device B) communicates with the terminal device C.
  • the network elements in the UE-to-Network relay system include remote UE, relay UE, and network equipment.
  • Relay UE can help remote UE access network equipment to obtain network services, including data transmission between remote UE and gNB.
  • network elements in the UE-to-UE relay system include source UE, relay UE, and destination UE.
  • the PC5 interface is between the source UE and the relay UE, and the PC5 interface is between the relay UE and the destination UE.
  • Relay UE can help source UE and destination UE perform data transmission.
  • the Discovery procedure is used to discover and be discovered between adjacent UEs through the PC5 interface.
  • discovery procedure can be used for discovery between remote UE (or source UE) and relay UE.
  • the Discovery procedure has two modes, namely Mode A (Mode A) and Mode B (Mode B).
  • Figure 4 is a schematic diagram of Mode A in the discovery process in the embodiment of the present application.
  • the relay UE in Mode A is shown in the figure.
  • An announcement message (Announcing message) can be sent, so that the monitoring remote UE A and remote UE B can discover the relay UE through the Announcing message.
  • FIG. 5 is a schematic diagram of Mode B in the discovery process in the embodiment of the application.
  • the remote UE in Mode B can send a Solicitation message. If the relay UE A can help the remote UE to forward data , the relay UE A will send a Response message to the remote UE.
  • the UE direct communication process can realize the direct discovery of the UE, which is used for the discovery between the UE and the UE.
  • 6 is a schematic diagram of the direct communication process in the embodiment of the application. As shown in the figure, UE A sends a direct communication request (Direct Communication Request) message to UE B and UE C. If UE C sends a direct communication accept ( Direct Communication Accept) message to complete the direct connection establishment between UE A and UE C.
  • Direct Communication Request Direct Communication Request
  • UE C sends a direct communication accept ( Direct Communication Accept) message to complete the direct connection establishment between UE A and UE C.
  • L3 Filtering instructs the UE to use formula (1) to filter the measurement results before it is used to evaluate reporting criteria or measurement reports:
  • Fn indicates the updated filtered measurement result used to evaluate the reporting criteria or measurement report
  • Mn indicates the latest measurement result of the physical layer
  • Fn-1 indicates the old filtered measurement result
  • k or ki indicates a filter coefficient
  • the embodiments of the present application provide a method for selecting a relay terminal device and a method for data transmission, which are used in the D2D field, V2X, Internet of Vehicles, intelligent driving or assisted driving and other fields, when no PDSCH is available.
  • select the relay terminal device select the relay terminal device.
  • the terminal device may receive the discovery indication information in different ways, that is, receive the discovery indication information through the PSSCH, or receive the discovery indication information through the SL SCI. The following will describe the embodiments of the present application based on different ways of receiving the discovery indication information. The method used to select the relay terminal device is described in detail.
  • FIG. 7 is a schematic diagram of an embodiment of a method for selecting a relay terminal device in an embodiment of the present application. As shown in the figure, the method for selecting a relay terminal device includes the following steps.
  • the terminal device measures the first measurement quantities of N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain a first measurement result set, Among them, N is a positive integer.
  • the terminal device is a terminal device whose serving frequency for sidelink SL communication is out of coverage, or the terminal device is a serving frequency used for SL communication, and the received power of the camping cell or the primary cell is Measure terminal devices below a second threshold, the second threshold being threshHigh, and the second threshold being preconfigured.
  • the terminal device becomes the remote UE or the source UE, that is, it enters the remote UE state or the source UE state.
  • the terminal device is in the relay UE discovery phase, so the N relay terminal devices will send the PSCCH to the terminal device, and also send the PSSCH indicated by the PSCCH to the terminal device.
  • the terminal device will be on at least one of the PSCCH and PSSCH channels. Measure the first measurement quantity to obtain a first measurement result set, where N is a positive integer, that is, the number of relay terminal apparatuses in this embodiment is at least 1.
  • the first measurement quantity is PSCCH-RSRP of the PSCCH.
  • the first measurement quantity is the PSSCH-RSRP of the PSSCH indicated by the PSCCH.
  • the first measurement quantity is the linear average value of the RE power occupied by all DMRSs on the PSCCH and the PSSCH of the PSSCH indicated by the PSCCH.
  • the first measurement quantity is the weighted average of the PSCCH-RSRP of the PSCCH and the PSSCH-RSRP of the PSSCH indicated by the PSCCH, and the weighted average of the PSCCH-RSRP of the PSCCH and the PSSCH-RSRP of the PSSCH indicated by the PSCCH can be obtained by Formula (2) is calculated to get:
  • Y indicates the PSCCH-RSRP of the PSCCH and the weighted average of the PSSCH-RSRP of the PSSCH indicated by the PSCCH
  • a indicates the first weighted average coefficient
  • b indicates the second weighted average coefficient
  • the first weighted average coefficient and the second weighted average coefficient of the weighted average are configured by the network device, or, pre-configured, or, the first preset value, which is not specifically limited here.
  • the relay terminal device may periodically send the PSCCH, and the configuration for periodically sending the PSCCH may be configured by the network device or pre-configured, which is not limited here.
  • the configuration for periodically sending the PSCCH includes a start time T0 and a period T, and the start time T0 and the period T are used for the relay terminal device discovery process of the terminal device.
  • the terminal device may also be in the second sidelink mode SL Mode 2, and the terminal device may perform resource sensing according to the first measurement result set.
  • the resource sensing that the terminal device can perform according to the first measurement result set is configured or pre-configured by the network device, which is not specifically limited here.
  • the terminal device receives M pieces of discovery indication information from N relay terminal apparatuses, where the M pieces of discovery indication information are used to indicate that M relay terminal apparatuses among the N relay terminal apparatuses are among the M first candidates Following the terminal device, M is less than or equal to N, and M is a positive integer.
  • M relay terminal devices among the N relay terminal devices send discovery indication information to the terminal device, where the discovery indication information is used to indicate that the relay terminal device is the first candidate relay terminal device, and the first relay terminal device is the first candidate relay terminal device.
  • the alternative relay terminal device is a terminal device that can help the terminal device to perform data forwarding. Therefore, the terminal device can receive M pieces of discovery indication information from the N relay terminal apparatuses, and determine M first candidate relay terminal apparatuses based on the M pieces of discovery indication information, where M is less than or equal to N, and M is positive Integer.
  • the terminal apparatus receives the PSSCH indicated by the N PSCCHs, and M PSSCHs in the N PSSCHs carry the discovery indication information.
  • the terminal device needs to receive/decode N PSCCHs, then receive PSSCHs indicated by the N PSCCHs, and decode the N PSSCHs, and then the upper layer of the terminal device determines that there are M PSSCHs in the N PSSCHs that carry the discovery
  • the high layer introduced in this implementation may be Layer 2 (Layer 2, L2) or L3, which is not specifically limited here.
  • L2 is the MAC layer
  • L3 is the RRC layer.
  • the 4 relay terminal devices are respectively relay terminal device A, relay terminal device B, relay terminal device C, and relay terminal device D as examples for description.
  • A, relay terminal device B, relay terminal device C, and relay terminal device D all send PSSCH to the terminal device, and the PSSCH sent by relay terminal device A and relay terminal device B carries discovery indication information, so the terminal The apparatus determines relay terminal apparatus A and relay terminal apparatus B as the first candidate relay terminal apparatus.
  • the discovery indication information when the terminal device is in Mode A of the Discovery procedure, is announcement message. In another possible implementation manner, when the terminal device is in Mode B of the Discovery procedure, the discovery indication information is response message. In another possible implementation manner, when the terminal device is in the UE direct communication process, it is found that the indication information is a direct communication accept message.
  • the discovery indication information may also be a field or an indication field of a sidelink media access control layer control element (Sidelink Media Access Control Element, SL MAC CE).
  • the terminal device selects a first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set, where the first filtering result set is a first target relay terminal device in the first measurement result set A measurement result is filtered.
  • the terminal device may filter the latest first measurement result in the first measurement result set to obtain the first filter result set, and obtain the first filter result set according to the data obtained from the M first candidate relay terminals.
  • the first target relay terminal device is selected from among the devices.
  • the terminal device selects the first filter results from the plurality of first filter result sets.
  • the result set determines the latest obtained first filter result set for selecting the first target relay terminal device.
  • the specific manner of acquiring the first filtering result set is not limited here.
  • the filtering can be layer two filtering (L2 Filtering) or layer three filtering.
  • L2 filtering is performed in L2, while L3 filtering is performed in L3.
  • the specific operation calculation process of L2 filtering is similar to that of L3 filtering operation. It has been introduced in the foregoing embodiments and will not be repeated here.
  • the terminal device when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2 and performs relay UE selection/reselection
  • the terminal device can select the first target relay terminal device from the M first candidate relay terminal devices in different ways. method is introduced.
  • the terminal device determines the first filtering result with the largest filtering value in the first filtering result set as the first target filtering result, and selects the M first candidate relay terminal devices from the first filtering result.
  • the first candidate relay terminal device corresponding to the first target filtering result is determined to be the first target relay terminal device.
  • the terminal device selects the relay terminal device that satisfies the relay terminal device candidate criteria and has the best PC5 link quality as the first target relay terminal device.
  • the PC5 link quality is measured by the first filtering result set, and the first filtering result corresponding to the best PC5 link quality has the largest filtering value.
  • M first candidate relay terminal devices correspond to M first filtering results
  • the first candidate relay terminal devices are relay terminal device A and relay terminal device B
  • relay terminal device A corresponds to the first filtering result B.
  • the filtering value of the first filtering result B is greater than the filtering value of the first filtering result A
  • the first filtering result B can be determined as the first target.
  • the filtering result, and the corresponding relay terminal device B is the first target relay terminal device.
  • the terminal device obtains M first filtering results corresponding to the M first candidate relay terminal devices from the first filtering result set, and determines whether there is a first filtering result in the M first filtering results.
  • the second target filtering result is greater than the first threshold, and if it exists, the first candidate relay terminal device corresponding to the second target filtering result greater than the first threshold is regarded as the first target relay terminal device.
  • the first threshold is q-RxLevMin, and when the terminal device is in the in coverage state, the first threshold is included in the reselectionInfoIC field of the RRC signaling. Secondly, when the terminal device is in the out of coverage state, the first threshold is included in the RRC signaling. Make the reselectionInfoOoC.
  • the terminal device selects the first candidate relay terminal device (relay terminal device B), and then obtains the first filtering result corresponding to the first candidate relay terminal device from the first filtering result set, if The first filtering result is greater than the first threshold, that is, the first filtering result is the second target filtering result, and the corresponding relay terminal device B is the first target relay terminal device.
  • the terminal device needs to continue to select among the M first candidate relay terminal devices until the first candidate relay terminal device whose corresponding first filtering result is greater than the first threshold is selected, and is determined as one of the first target relay terminal devices. follow the terminal device.
  • the terminal device establishes a communication connection with the first target relay terminal device.
  • the terminal device may establish a communication connection with the first target relay terminal device. For example, if the relay terminal device B is determined to be the first target relay terminal device in step S103 , the terminal device and the relay terminal device B establish a communication connection.
  • the relay terminal device transmits the data sent by the terminal device to the target device.
  • the terminal device when the terminal device needs to transmit data to the target device, it needs to first transmit the data to the relay terminal device determined as the first target relay terminal device, and then the relay terminal device transmits the data to the target device. , thereby completing the data transmission from the terminal device to the target device.
  • the relay terminal device B is determined to be the first target relay terminal device through step S103, after the terminal device and the relay terminal device B are established in communication connection through step S104, when the terminal device needs to transmit data to the target device, The terminal device will send data to the relay terminal device B, and then the relay terminal device B will transmit the data to the target device.
  • the target device transmission is a receiving terminal device and/or a network device, where the receiving terminal device is the sink UE introduced in the foregoing embodiment.
  • the relay terminal device transmits data to the network device, and if applied to the UE-to-UE relay transmission scenario, the relay terminal device transmits data to the receiving terminal device.
  • the SL SCI includes the 1st stage SCI and/or the 2nd stage SCI, so the discovery indication information can be received through the 1st stage SCI, or the discovery indication information can be received through the 2nd stage SCI, or the discovery indication information can be received through the 1st stage SCI and the 2nd stage SCI , the following will introduce two ways in which SL SCI includes 1st stage SCI and SL SCI includes 2nd stage SCI.
  • the specific implementation method and 1st stage SCI and 2nd stage SCI are received respectively. The way of discovering the indication information is similar and will not be described here.
  • SL SCI includes 1st stage SCI
  • FIG. 8 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application. As shown in the figure, the method for selecting a relay terminal device includes the following steps.
  • the terminal device measures the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain a first measurement result set, Among them, N is a positive integer.
  • the terminal device is a terminal device whose serving frequency for sidelink SL communication is out of coverage, or the terminal device is a serving frequency used for SL communication, and the received power of the camping cell or the primary cell is Measure terminal devices below a second threshold, the second threshold being threshHigh, and the second threshold being preconfigured.
  • the specific manner in which the terminal device obtains the first measurement result set is similar to step S101, and details are not described herein again.
  • the terminal device receives M pieces of discovery indication information from N relay terminal apparatuses, where the M pieces of discovery indication information are used to indicate that M relay terminal apparatuses among the N relay terminal apparatuses are among the M first candidates Following the terminal device, M is less than or equal to N, and M is a positive integer;
  • the terminal device when the terminal device receives M pieces of discovery indication information, the terminal device receives N pieces of 1ST STAGE SCI, and M pieces of 1ST STAGE SCI among the N pieces of 1ST STAGE SCI include a display indication field, and the display indication field is used to indicate that among the N pieces of 1ST STAGE SCI M relay terminal apparatuses in the relay terminal apparatuses are M first candidate relay terminal apparatuses, and the indication information is found to be a display indication field at this time.
  • the 1ST STAGE SCI use 1 bit to distinguish whether the 1ST STAGE SCI is used for the discovery function of the relay terminal device or the communication function, that is, to distinguish whether the terminal device can determine the first candidate relay terminal according to the discovery indication information. device.
  • the display indication field can be indicated by 1 bit in the SL SCI.
  • the value of the display indication field of 1 bit is 1, it can be determined that the SL SCI is used for the discovery function of the relay terminal device, that is, the terminal device can determine according to the discovery indication information.
  • the relay terminal device that sends the SL SCI is the first candidate relay terminal device.
  • the value of the display indication field of 1 bit is 0, it can be determined that the SL SCI is used for the communication function, that is, the terminal device can determine that the relay terminal device sending the SL SCI is not the first candidate relay terminal device according to the indication information.
  • the 4 relay terminal devices are respectively relay terminal device A, relay terminal device B, relay terminal device C, and relay terminal device D as examples for description.
  • A, relay terminal device B, relay terminal device C and relay terminal device D all send 1ST STAGE SCI to the terminal device, and the 1ST STAGE SCI sent by relay terminal device B and relay terminal device C includes a display instruction Therefore, the terminal device determines relay terminal device B and relay terminal device C as the first candidate relay terminal device.
  • the terminal device receives M pieces of discovery indication information
  • the terminal device receives N pieces of 1ST STAGE SCI
  • the N pieces of 1ST STAGE SCI include a descrambling field
  • the descrambling field is used to indicate M relays in the N relay terminal devices
  • the terminal devices are M first candidate relay terminal devices, and the descrambling field is obtained by descrambling the fields in the 1ST STAGE SCI.
  • the indication information is the descrambling field.
  • the implicit indication field can be indicated by descrambling with 1 bit in the SL SCI.
  • the SL SCI used for the relay terminal device can be determined based on the descrambling field.
  • Discovery function that is, the terminal device can determine that the relay terminal device sending the SL SCI is the first candidate relay terminal device according to the discovery indication information.
  • the descrambling field is 0 obtained after the last 1 bit of descrambling, it can be determined that the SL SCI is used for the communication function based on the descrambling field, that is, the terminal device can determine according to the indication information that the relay terminal device sending the SL SCI is not the first standby device. Select the relay terminal device.
  • the 4 relay terminal devices are respectively relay terminal device A, relay terminal device B, relay terminal device C, and relay terminal device D as examples for description.
  • A, relay terminal device B, relay terminal device C and relay terminal device D all send 1ST STAGE SCI to the terminal device, and the 1ST STAGE SCI sent by relay terminal device B and relay terminal device D includes descrambling field, so the terminal device determines relay terminal device B and relay terminal device D as the first candidate relay terminal device.
  • the terminal device selects a first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set, where the first filtering result set is a first target relay terminal device in the first measurement result set.
  • a measurement result is filtered.
  • the specific manner in which the terminal device selects the first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set is similar to step S103, and details are not repeated here.
  • the terminal device establishes a communication connection with the first target relay terminal device.
  • step S104 the specific manner in which the terminal device establishes the communication connection with the first target relay terminal device is similar to step S104, and details are not described herein again.
  • the relay terminal device transmits the data sent by the terminal device to the target device.
  • step S105 the specific manner in which the relay terminal device transmits the data sent by the terminal device to the target device is similar to step S105, and details are not repeated here.
  • FIG. 9 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application. As shown in the figure, the method for selecting a relay terminal device includes the following steps.
  • the terminal device measures the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain a first measurement result set, Among them, N is a positive integer.
  • the terminal device measures the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain the first measurement
  • the manner of the result set is similar to that of step S101, and details are not described herein again.
  • the terminal device receives M pieces of discovery indication information from N relay terminal apparatuses, where the M pieces of discovery indication information are used to indicate that M relay terminal apparatuses in the N relay terminal apparatuses are among the M first candidates Following the terminal device, M is less than or equal to N, and M is a positive integer;
  • the terminal device when the terminal device receives M pieces of discovery indication information, the terminal device receives N 2nd stage SCIs, and M 2nd stage SCIs in the N 2nd stage SCIs include a display indication field, and the display indication field is used to indicate N among the N 2nd stage SCIs.
  • M relay terminal apparatuses in the relay terminal apparatuses are M first candidate relay terminal apparatuses, and the indication information is found to be a display indication field at this time.
  • the 2nd stage SCI use 1 bit to distinguish whether the 2nd stage SCI is used for the discovery function of the relay terminal device or for the communication function, that is, to distinguish whether the terminal device can determine the first alternative relay terminal according to the discovery instruction information. device.
  • the display indication field can be indicated by 1 bit in the SL SCI.
  • the value of the display indication field of 1 bit is 1, it can be determined that the SL SCI is used for the discovery function of the relay terminal device, that is, the terminal device can determine according to the discovery indication information.
  • the relay terminal device that sends the SL SCI is the first candidate relay terminal device.
  • the value of the display indication field of 1 bit is 0, it can be determined that the SL SCI is used for the communication function, that is, the terminal device can determine that the relay terminal device sending the SL SCI is not the first candidate relay terminal device according to the indication information.
  • the 4 relay terminal devices are respectively relay terminal device A, relay terminal device B, relay terminal device C, and relay terminal device D as examples for description.
  • A, relay terminal device B, relay terminal device C and relay terminal device D all send 2nd stage SCI to the terminal device, and the 2nd stage SCI sent by relay terminal device B and relay terminal device C includes a display indication Therefore, the terminal device determines relay terminal device B and relay terminal device C as the first candidate relay terminal device.
  • the terminal device receives M pieces of discovery indication information
  • the terminal device receives N 2nd stage SCIs
  • the N 2nd stage SCIs include a descrambling field
  • the descrambling field is used to indicate M relays in the N relay terminal devices.
  • the terminal devices are M first candidate relay terminal devices, and the descrambling field is obtained by descrambling the fields in the 2nd stage SCI.
  • the indication information is the descrambling field.
  • the descramble field is used to distinguish whether the 2nd stage SCI is used for the discovery function of the relay terminal device or the It is used for the communication function, that is, to distinguish whether the terminal device can determine the first candidate relay terminal device according to the discovery indication information.
  • the implicit indication field can be indicated by descrambling with 1 bit in the SL SCI.
  • the terminal device can determine, according to the discovery indication information, that the relay terminal device that sends the SL SCI is the first candidate relay terminal device. Secondly, when the descrambling field is 0 obtained after the last 1 bit of descrambling, it can be determined that the SL SCI is used for the communication function based on the descrambling field, that is, the terminal device can determine according to the indication information that the relay terminal device sending the SL SCI is not the first standby device. Select the relay terminal device.
  • the 4 relay terminal devices are respectively relay terminal device A, relay terminal device B, relay terminal device C, and relay terminal device D as examples for description.
  • A, relay terminal device B, relay terminal device C and relay terminal device D all send 2nd stage SCI to the terminal device, and the 2nd stage SCI sent by relay terminal device B and relay terminal device D includes descrambling field, so the terminal device determines relay terminal device B and relay terminal device D as the first candidate relay terminal device.
  • the terminal device selects a first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set, where the first filtering result set is a A measurement result is filtered.
  • the specific manner in which the terminal device selects the first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set is similar to step S103, and details are not repeated here.
  • the terminal device establishes a communication connection with the first target relay terminal device.
  • step S104 the specific manner in which the terminal device establishes the communication connection with the first target relay terminal device is similar to step S104, and details are not described herein again.
  • the relay terminal device transmits the data sent by the terminal device to the target device.
  • step S105 the specific manner in which the relay terminal device transmits the data sent by the terminal device to the target device is similar to step S105, and details are not repeated here.
  • the terminal device may obtain the first set of filtering results in different ways.
  • the terminal device continuously filters the first measurement results in the first set of measurement results to obtain multiple filter results.
  • the filtering result set is determined, and after the discovery indication information is received, the latest filtering result set among the multiple filtering result sets is determined as the first filtering result set.
  • the terminal device caches the first measurement result set in the physical layer, and when the terminal device receives the discovery indication information, obtains the latest first measurement result set from the physical layer, and then performs the first measurement The measurement result set is filtered to obtain a first filter result set.
  • the terminal device after acquiring the first measurement result set, the terminal device continuously filters multiple first measurement results in the first measurement result set, thereby obtaining multiple first filtering result sets, and then filters the multiple first measurement result sets. Multiple filtering result sets are buffered to the upper layer, and when the terminal device receives the discovery indication information, it directly obtains the latest first filtering result set from the upper layer.
  • the method for selecting a relay terminal device used in this embodiment of the present application will be described in detail below based on different ways of obtaining the first filtering result set.
  • FIG. 10 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application. As shown in the figure, the method for selecting a relay terminal device includes the following steps.
  • the terminal device measures the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain a first measurement result set, Among them, N is a positive integer.
  • the terminal device measures the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain the first measurement
  • the manner of the result set is similar to that of step S101, and details are not described herein again.
  • the terminal device continuously filters the first measurement results in the first measurement result set to obtain multiple filter result sets.
  • the terminal device performs physical layer measurement on the first measurement quantity in step S401 to obtain a first measurement result set, and continuously filters the first measurement results in the first measurement result set.
  • multiple filter result sets are obtained.
  • the terminal device performs physical layer measurement on the first measurement quantity at the 1st ms, the 3rd ms, and the 5th ms as an example for description.
  • a first measurement result set can be obtained, and each first measurement result corresponds to a time point.
  • the first measurement result set includes the first measurement result A, the first measurement result B, and the first measurement result C.
  • the first measurement result A is obtained by the terminal device performing physical layer measurement on the first measurement quantity at the 1st ms
  • the first measurement result B is obtained by the terminal device performing physical layer measurement on the first measurement quantity at the 3rd ms.
  • the measurement result C is obtained by performing physical layer measurement on the first measurement quantity by the terminal device at the 5th ms.
  • the terminal device filters the first measurement result A, and can obtain the filter result set A corresponding to the first measurement result A. Similarly, it can obtain the filter result set B corresponding to the first measurement result B, and obtain the filter result set B corresponding to the first measurement result B.
  • the filter result set C corresponding to the first measurement result C, and the filter result set A, the filter result set B, and the filter result set C are obtained by continuous filtering by the terminal device, and each filter result set corresponds to a time point.
  • the time interval for continuous filtering may be configured by the network device, or pre-configured.
  • the filtering can be L2 Filtering or L3 Filtering.
  • L2 Filtering is performed in L2, while L3 Filtering is performed in L3.
  • the specific operation calculation process of L2 Filtering is similar to the L3 Filtering operation calculation process, and L3 Filtering has been performed in the foregoing embodiment. The introduction will not be repeated here.
  • the terminal device when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2 and performs relay UE selection/reselection
  • the terminal device receives M pieces of discovery indication information from N relay terminal apparatuses, where the M pieces of discovery indication information are used to indicate that M relay terminal apparatuses among the N relay terminal apparatuses are among the M first candidates Following the terminal device, M is less than or equal to N, and M is a positive integer;
  • the manner in which the terminal device receives M pieces of discovery indication information from the N relay terminal devices may be the method described in step S102, the method described in step S202, or the method described in step S302. , and will not be repeated here. And the specific method used is not limited here.
  • the terminal device determines a first set of filtering results from multiple sets of filtering results.
  • the terminal device since the terminal device has received the discovery indication information, at this time, the terminal device may determine the first filter result set from the multiple filter result sets obtained in step S402. Specifically, the first filtering result set is the latest filtering result set among the multiple filtering result sets.
  • the terminal device performs physical layer measurement on the first measurement quantity at the 1st ms, 3rd ms, and 5th ms as an example for description.
  • the first measurement result A is obtained by performing physical layer measurement on the first measurement quantity by the terminal device at the 1st ms
  • the first measurement result B is obtained by performing physical layer measurement on the first measurement quantity by the terminal device at the 3rd ms.
  • the first measurement result C is obtained by performing physical layer measurement on the first measurement quantity by the terminal device at the 5th ms.
  • the first measurement result A corresponds to the filter result set A
  • the first measurement result B corresponds to the filter result set B
  • the first measurement result C corresponds to the filter result set C.
  • the terminal device selects a first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set.
  • the specific manner in which the terminal device selects the first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set is similar to step S103, and details are not repeated here.
  • the terminal device establishes a communication connection with the first target relay terminal device.
  • step S104 the specific manner in which the terminal device establishes the communication connection with the first target relay terminal device is similar to step S104, and details are not described herein again.
  • the relay terminal device transmits the data sent by the terminal device to the target device.
  • step S105 the specific manner in which the relay terminal device transmits the data sent by the terminal device to the target device is similar to step S105, and details are not repeated here.
  • FIG. 11 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application. As shown in the figure, the method for selecting a relay terminal device includes the following steps.
  • the terminal device measures the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain a first measurement result set, Among them, N is a positive integer.
  • the terminal device measures the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain the first measurement
  • the manner of the result set is similar to that of step S101, and details are not described herein again.
  • the terminal device buffers the first measurement result set to the physical layer.
  • the terminal device caches the obtained first measurement result set to the physical layer.
  • the buffering time corresponding to the buffering of the first measurement result set by the terminal device is configured by the network device, or is pre-configured, or is the second preset value.
  • the cache time corresponding to the cache includes a minimum value, which is used to indicate the shortest time that the first measurement result set can be stored in the physical layer. In this case, if the cache time is 50ms, it indicates the first measurement result set. The result set needs to be kept at the physical layer for at least 50ms.
  • the cache time corresponding to the cache includes a maximum value, which is used to indicate the longest time that the first measurement result set can be stored in the physical layer.
  • the cache time corresponding to the cache includes a minimum value and a maximum value, and the maximum value and the minimum value can indicate the time range in which the first measurement result set is stored in the physical layer.
  • the minimum value of the buffering time is 50ms
  • the maximum value of the buffering time is 500ms, which indicates that the first measurement result set can be stored in the physical layer for 50ms to 500ms.
  • the terminal device receives M pieces of discovery indication information from N relay terminal apparatuses, where the M pieces of discovery indication information are used to indicate that M relay terminal apparatuses among the N relay terminal apparatuses are among the M first candidates Following the terminal device, M is less than or equal to N, and M is a positive integer;
  • the manner in which the terminal device receives M pieces of discovery indication information from the N relay terminal devices may be the method described in step S102, the method described in step S202, or the method described in step S302. , and will not be repeated here. And the specific method used is not limited here.
  • the terminal device obtains a first measurement result set from the physical layer, and filters one first measurement result in the first measurement result set to obtain a first filtering result set.
  • the terminal device since the terminal device has received the discovery indication information, the terminal device can obtain the first set of measurement results from the physical layer at this time, and filter the first set of measurement results to obtain the first set of filter results.
  • the filtering can be L2 Filtering or L3 Filtering.
  • L2 Filtering is performed in L2, while L3 Filtering is performed in L3.
  • the specific operation calculation process of L2 Filtering is similar to the L3 Filtering operation calculation process, and L3 Filtering has been performed in the foregoing embodiment. The introduction will not be repeated here.
  • the terminal device when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2 and performs relay UE selection/reselection
  • the terminal device selects a first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set.
  • the specific manner in which the terminal device selects the first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set is similar to step S103, and details are not repeated here.
  • the terminal device establishes a communication connection with the first target relay terminal device.
  • step S104 the specific manner in which the terminal device establishes the communication connection with the first target relay terminal device is similar to step S104, and details are not described herein again.
  • the relay terminal device transmits the data sent by the terminal device to the target device.
  • step S105 the specific manner in which the relay terminal device transmits the data sent by the terminal device to the target device is similar to step S105, and details are not repeated here.
  • FIG. 12 is a schematic diagram of another embodiment of a method for selecting a relay terminal device in an embodiment of the present application. As shown in the figure, the method for selecting a relay terminal device includes the following steps.
  • the terminal device measures the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain a first measurement result set, Among them, N is a positive integer.
  • the terminal device measures the first measurement quantities of the N relay terminal devices on at least one of the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, to obtain the first measurement
  • the manner of the result set is similar to that of step S101, and details are not described herein again.
  • the terminal device filters multiple first measurement results in the first measurement result set to obtain multiple first filtering result sets, and buffers the multiple first filtering result sets to a higher layer.
  • the terminal device performs filtering on multiple first measurement results in the first measurement result set to obtain multiple first filtering result sets. Then, the terminal device buffers the obtained multiple first filtering result sets to a higher layer.
  • the high layer introduced in this implementation may be L2 or L3, which is not specifically limited here.
  • L2 is the MAC layer
  • L3 is the RRC layer.
  • the filtering can be L2 Filtering or L3 Filtering.
  • L2 Filtering is performed in L2, while L3 Filtering is performed in L3.
  • the specific operation calculation process of L2 Filtering is similar to the L3 Filtering operation calculation process, and L3 Filtering has been performed in the foregoing embodiment. The introduction will not be repeated here. It can be understood that the foregoing examples are only used to understand the present solution, and the specific filtering result set and filtering method need to be flexibly determined according to the actual situation, which is not limited in the present solution.
  • the terminal device when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2, the terminal device can obtain the first measurement result set, and when the terminal device is in SL Mode 2 and performs relay UE selection/reselection, the terminal device can use the first measurement result set to obtain.
  • the first set of filtering results when the terminal device is in SL Mode 2 and performs relay UE selection/reselection
  • the buffering time corresponding to the buffering of the first filtering result set by the terminal device is configured by the network device, or is pre-configured, or is the second preset value.
  • the cache time corresponding to the cache includes a minimum value, which is used to indicate the shortest time that the first filter result set can be stored in the high layer. In this case, if the cache time is 50ms, it indicates the first filter result. Collections need to be kept at the high level for at least 50ms.
  • the cache time corresponding to the cache includes a maximum value, which is used to indicate the maximum time that the first filter result set can be stored in the high layer.
  • the cache time corresponding to the cache includes a minimum value and a maximum value, and the maximum value and the minimum value can indicate the time range in which the first filter result set is stored in the high layer.
  • the cache The minimum value of the time is 50ms
  • the maximum value of the cache time is 500ms, which indicates that the first filtering result set can be stored in the upper layer for 50ms to 500ms.
  • the terminal device receives M pieces of discovery indication information from N relay terminal apparatuses, where the M pieces of discovery indication information are used to indicate that M relay terminal apparatuses among the N relay terminal apparatuses are among the M first candidates Following the terminal device, M is less than or equal to N, and M is a positive integer;
  • the manner in which the terminal device receives M pieces of discovery indication information from the N relay terminal devices may be the method described in step S102, the method described in step S202, or the method described in step S302. , which will not be repeated here. And the specific method used is not limited here.
  • the terminal device obtains the first set of filtering results from the upper layer.
  • the terminal device since the terminal device has received the discovery indication information, at this time, the terminal device can obtain the first filter result set from the upper layer, and the obtained first filter result set is the latest first filter result set obtained from the multiple first filter result sets. A collection of filtering results.
  • the terminal device caches the first filter result set at the 10th, 20th, and 30th ms, and the buffering time corresponding to the cache includes the maximum value, indicating that the first filter result set can be stored in the upper layer for 10ms as an example. Be explained. If the first filter result set A is cached at the 10th ms, the first filter result set B is cached after 10ms (ie, the 20th ms), and the first filter result set C is cached after 10 ms (ie, the 30th ms).
  • the high-level cache is the first filtering result set C, so the terminal device obtains the first filtering result set C, and then selects the first target relay based on the first filtering result set C. Steps for the terminal device. It should be understood that the foregoing examples are only used for understanding the present solution, and the first filtering result set to be obtained specifically needs to be determined according to the buffering time and the time at which the discovery indication information is specifically received.
  • the terminal device selects a first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set.
  • the specific manner in which the terminal device selects the first target relay terminal device from the M first candidate relay terminal devices according to the first filtering result set is similar to step S103, and details are not repeated here.
  • the terminal device establishes a communication connection with the first target relay terminal device.
  • step S104 the specific manner in which the terminal device establishes the communication connection with the first target relay terminal device is similar to step S104, and details are not described herein again.
  • the relay terminal device transmits the data sent by the terminal device to the target device.
  • step S105 the specific manner in which the relay terminal device transmits the data sent by the terminal device to the target device is similar to step S105, and details are not repeated here.
  • the communication apparatus includes corresponding hardware structures and/or software modules for executing each function.
  • the present application can be implemented in hardware or in the form of a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • This embodiment of the present application may divide the communication device into functional modules based on the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.
  • FIG. 13 is a schematic diagram of an embodiment of the communication device in the embodiment of the present application.
  • the communication device 600 includes a processing module 601 and a transceiver module 602 .
  • the communication device 600 may correspond to the terminal device in the above method embodiments, for example, may be a terminal device, or a component (such as a circuit, a chip or a chip system, etc.) configured in the terminal device.
  • the communication apparatus 600 may correspond to the method in FIG. 7 , or the method in FIG. 8 , or the method in FIG. 9 , or the method in FIG. 10 , or the method in FIG. 11 according to an embodiment of the present application
  • the method in FIG. 12 , or the method in FIG. 12 the communication apparatus 600 may include a method for performing the method in FIG. 7 , or the method in FIG. 8 , or the method in FIG. 9 , or the method in FIG. 10 , or, a unit of the method performed by the terminal device in the method in FIG. 11 .
  • each unit in the communication device 600 and the above-mentioned other operations and/or functions are to implement the method in FIG. 7 , or the method in FIG. 8 , or the method in FIG. 9 , or the method in FIG. 10 , respectively.
  • the method in FIG. 11 or, the corresponding flow of the method in FIG. 12 .
  • the transceiver module 602 can be used to execute steps S102 , S104 and S105 of the method in FIG. 7
  • the processing module 601 can be used to execute the steps of the method in FIG. 7 .
  • Step S101 and Step S103 It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 602 can be used to execute steps S202 , S204 and S205 of the method in FIG. 8
  • the processing module 601 can be used to execute step S201 of the method in FIG. 8 . and step S203.
  • the transceiver module 602 can be used to execute steps S302 , S304 and S305 of the method in FIG. 9
  • the processing module 601 can be used to execute step S301 of the method in FIG. 9 . and step S303. It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 602 can be used to execute steps S403 , S406 and S407 of the method in FIG. 10
  • the processing module 601 can be used to execute step S401 of the method in FIG. 10 . , step S402, step S404 and step S405. It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 602 can be used to execute steps S503 , S506 and S507 of the method in FIG. 11
  • the processing module 601 can be used to execute step S501 of the method in FIG. 11 . , step S502, step S504 and step S505. It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 602 can be used to execute steps S903 , S906 and S907 of the method in FIG. 12
  • the processing module 601 can be used to execute step S901 of the method in FIG. 12 .
  • the transceiver module 602 in the communication device 600 may be implemented by a transceiver, for example, it may correspond to the transceiver 820 in the communication device 800 shown in FIG. 15 or the transceiver 820 in FIG. 16 .
  • the processing module 601 in the communication device 600 may be implemented by at least one processor, for example, it may correspond to the processor 810 in the communication device 800 shown in FIG. 15 or the processor 810 in FIG. 16 .
  • the transceiver module 602 in the communication device 600 can be implemented through input/output interfaces, circuits, etc., and the processing module 601 in the communication device 600 It can be implemented by a processor, microprocessor or integrated circuit integrated on the chip or chip system.
  • FIG. 14 is a schematic diagram of another embodiment of the communication device according to the embodiment of the present application.
  • the communication device 700 includes a transceiver module 701 .
  • the communication apparatus 700 may correspond to the relay terminal apparatus in the above method embodiments, for example, may be a relay terminal apparatus, or a component (such as a circuit, a chip or a chip system) configured in the relay terminal apparatus Wait).
  • the communication device 700 may correspond to the method in FIG. 7 , or the method in FIG. 8 , or the method in FIG. 9 , or the method in FIG. 10 , or the method in FIG. 11 according to an embodiment of the present application.
  • the method in FIG. 12 , or the method in FIG. 12 the communication apparatus 700 may include a method for performing the method in FIG. 7 , or the method in FIG. 8 , or the method in FIG. 9 , or the method in FIG. 10 , or, a unit of the method performed by the relay terminal device in the method in FIG. 11 .
  • each unit in the communication device 700 and the above-mentioned other operations and/or functions are to implement the method in FIG. 7 , or the method in FIG. 8 , or the method in FIG. 9 , or the method in FIG. 10 , respectively.
  • the method in FIG. 11 or, the corresponding flow of the method in FIG. 12 .
  • the transceiver module 701 can be used to execute step S101 , step S102 , step S104 and step S105 of the method in FIG. 6 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 701 can be used to execute step S201 , step S202 , step S204 and step S205 of the method in FIG. 8 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 701 can be used to execute step S301 , step S302 , step S304 and step S305 of the method in FIG. 9 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 701 can be used to execute step S401 , step S403 , step S406 and step S407 of the method in FIG. 10 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 701 can be used to execute step S501 , step S503 , step S506 and step S507 of the method in FIG. 11 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 701 can be used to execute step S901 , step S903 , step S906 and step S907 of the method in FIG. 12 . It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above-mentioned method embodiments, and for the sake of brevity, it will not be repeated here.
  • the transceiver module 702 in the communication device 700 may be implemented by a transceiver, for example, it may correspond to the transceiver 820 in the communication device 800 shown in FIG. 15 or the transceiver 820 in FIG. 16 .
  • the processing module 701 in the communication device 700 may be implemented by at least one processor, for example, it may correspond to the processor 810 in the communication device 800 shown in FIG. 15 or the processor 810 in FIG. 16 .
  • the transceiver module 702 in the communication device 700 can be implemented through input/output interfaces, circuits, etc., and the processing module 701 in the communication device 700 It can be implemented by a processor, microprocessor or integrated circuit integrated on the chip or chip system.
  • FIG. 15 is a schematic block diagram of a communication apparatus 800 in an embodiment of the present application.
  • the communication device 800 includes a processor 810 , a transceiver 820 and a memory 830 .
  • the processor 810, the transceiver 820 and the memory 830 communicate with each other through an internal connection path, the memory 830 is used to store instructions, and the processor 810 is used to execute the instructions stored in the memory 830 to control the transceiver 820 to send signals and / or receive signals.
  • the communication device 800 may correspond to the terminal device or the relay terminal device in the above method embodiments, and may be used to execute various steps and/or processes performed by the relay terminal device or the terminal device in the above method embodiments.
  • the memory 830 may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory.
  • the memory 830 can be a separate device or can be integrated in the processor 810 .
  • the processor 810 may be configured to execute the instructions stored in the memory 830, and when the processor 810 executes the instructions stored in the memory, the processor 810 is configured to execute the above method embodiments corresponding to the relay terminal device or the terminal device the individual steps and/or processes.
  • the communication device 800 is the terminal device in the foregoing embodiment.
  • the communication device 800 is the relay terminal device in the foregoing embodiment.
  • the transceiver 820 may include a transmitter and a receiver.
  • the transceiver 820 may further include antennas, and the number of the antennas may be one or more.
  • the processor 810, the memory 830 and the transceiver 820 may be devices integrated on different chips.
  • the processor 810 and the memory 830 may be integrated in the baseband chip, and the transceiver 820 may be integrated in the radio frequency chip.
  • the processor 810, the memory 830 and the transceiver 820 may also be devices integrated on the same chip. This application does not limit this.
  • the communication device 800 is a component configured in a terminal device, such as a circuit, a chip, a chip system, and the like.
  • the communication device 800 is a component configured in a relay terminal device, such as a circuit, a chip, a chip system, and the like.
  • the transceiver 820 may also be a communication interface, such as an input/output interface, a circuit, and the like.
  • the transceiver 820, the processor 810 and the memory 820 can be integrated in the same chip, such as a baseband chip.
  • FIG. 16 is a schematic structural diagram of a terminal device 3000 provided by an embodiment of the present application.
  • the terminal device 3000 can be applied to the system shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiments.
  • the terminal device 3000 includes a processor 3010 and a transceiver 3020 .
  • the terminal device 3000 further includes a memory 3030 .
  • the processor 3010, the transceiver 3020 and the memory 3030 can communicate with each other through an internal connection path to transmit control and/or data signals.
  • the computer program is invoked and executed to control the transceiver 3020 to send and receive signals.
  • the terminal device 3000 may further include an antenna 3040 for sending the uplink data or uplink control signaling output by the transceiver 3020 through wireless signals.
  • the above-mentioned processor 3010 and the memory 3030 can be combined into a communication device, and the processor 3010 is configured to execute the program codes stored in the memory 3030 to realize the above-mentioned functions.
  • the memory 3030 may also be integrated in the processor 3010 or independent of the processor 3010 .
  • the processor 3010 may correspond to the processing module 602 in FIG. 13 or the processor 810 in FIG. 15 .
  • the transceiver 3020 described above may correspond to the transceiver module 601 in FIG. 13 or the transceiver 820 in FIG. 15 .
  • the transceiver 3020 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Among them, the receiver is used for receiving signals, and the transmitter is used for transmitting signals.
  • the terminal device 3000 shown in FIG. 16 can implement the method embodiment shown in FIG. 7 , or the method embodiment shown in FIG. 8 , or the method embodiment shown in FIG. 9 , or the method embodiment shown in FIG. 10 .
  • the method embodiment shown in FIG. 11 , or the method embodiment shown in FIG. 12 involves various processes of a terminal device or a relay terminal device.
  • the operations and/or functions of each module in the terminal device 3000 are respectively to implement the corresponding processes in the foregoing method embodiments.
  • the above-mentioned processor 3010 may be used to perform the actions described in the foregoing method embodiments that are implemented inside the terminal device, and the transceiver 3020 may be used to perform the foregoing method embodiments. The action received by the device. For details, please refer to the descriptions in the foregoing method embodiments, which will not be repeated here.
  • the above-mentioned terminal device 3000 may further include a power supply 3050 for providing power to various devices or circuits in the terminal device.
  • the terminal device 3000 may further include one or more of an input unit 3060, a display unit 3070, an audio circuit 3080, a camera 3090, a sensor 3100, etc., the audio circuit Speakers 3082, microphones 3084, etc. may also be included.
  • FIG. 17 is a schematic structural diagram of a network device provided by an embodiment of the present application, which may be, for example, a schematic structural diagram of a base station.
  • the base station 4000 can be applied to the system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiments.
  • the base station 4000 may include one or more radio frequency units, such as an RRU 4100 , and one or more baseband units (BBUs) (also referred to as distributed units (DUs)) 4200 .
  • BBUs baseband units
  • DUs distributed units
  • the RRU 4100 may be referred to as a transceiver unit.
  • the RRU 4100 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 4101 and a radio frequency unit 4102.
  • the RRU 4100 may include a receiving unit and a sending unit, the receiving unit may correspond to a receiver (or called a receiver, a receiving circuit), and the sending unit may correspond to a transmitter (or called a transmitter, a sending circuit).
  • the part of the RRU 4100 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending indication information to terminal devices.
  • the part of the BBU 4200 is mainly used to perform baseband processing and control the base station.
  • the RRU 4100 and the BBU 4200 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 4200 is the control center of the base station, which can also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, and so on.
  • the BBU processing unit
  • the BBU may be used to control the base station to perform the operation procedure of the network device in the foregoing method embodiments, for example, to generate the foregoing indication information and the like.
  • the BBU 4200 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as an LTE network) of a single access standard, or may respectively support a wireless access network of different access standards.
  • Wireless access network (such as LTE network, 5G network or other network).
  • the BBU 4200 also includes a memory 4201 and a processor 4202.
  • the memory 4201 is used to store necessary instructions and data.
  • the processor 4202 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation flow of the network device in the foregoing method embodiments.
  • the memory 4201 and the processor 4202 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • the base station 4000 shown in FIG. 17 can implement the method embodiment shown in FIG. 7 , or the method embodiment shown in FIG. 8 , or the method embodiment shown in FIG. 9 , or the method embodiment shown in FIG. 10 , Or, the method embodiment shown in FIG. 11 or the method embodiment shown in FIG. 12 involves each process of the network device, that is, the process of receiving data sent by the terminal device.
  • the operations and/or functions of each module in the base station 4000 are respectively to implement the corresponding processes in the foregoing method embodiments.
  • the above-mentioned BBU 4200 can be used to perform the actions described in the previous method embodiments that are implemented inside the network device, and the RRU 4100 can be used to perform the actions that the network device described in the previous method embodiments sends to the terminal device and the relay terminal device, or an action received from a relay terminal device.
  • the RRU 4100 can be used to perform the actions that the network device described in the previous method embodiments sends to the terminal device and the relay terminal device, or an action received from a relay terminal device.
  • the base station 4000 shown in FIG. 17 is only a possible form of the network device, and should not constitute any limitation to the present application.
  • the method provided in this application can be applied to other forms of network devices.
  • it includes AAU, may also include CU and/or DU, or includes BBU and adaptive radio unit (ARU), or BBU; may also be customer premises equipment (CPE), or may be
  • AAU may also include CU and/or DU, or includes BBU and adaptive radio unit (ARU), or BBU; may also be customer premises equipment (CPE), or may be
  • CPE customer premises equipment
  • the CU and/or DU may be used to perform the actions implemented by the network device described in the foregoing method embodiments, and the AAU may be used to execute the network device described in the foregoing method embodiments to send to the terminal device and the relay terminal device. action, or action received from the relay terminal device.
  • the AAU may be used to execute the network device described in the foregoing method embodiments to send to the terminal device and the relay terminal device. action, or action received from the relay terminal device.
  • the present application also provides a communication device, including at least one processor, where the at least one processor is configured to execute a computer program stored in a memory, so that the communication device executes the terminal device or relay in any of the foregoing method embodiments A method performed by a terminal device.
  • the above communication device may be one or more chips.
  • the communication device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or a It is a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller unit). , MCU), it can also be a programmable logic device (PLD) or other integrated chips.
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • SoC system on chip
  • MCU microcontroller unit
  • MCU programmable logic device
  • PLD programmable logic device
  • the embodiments of the present application also provide a communication apparatus, including a processor and a communication interface.
  • the communication interface is coupled with the processor.
  • the communication interface is used to input and/or output information.
  • the information includes at least one of instructions and data.
  • the processor is configured to execute a computer program, so that the communication device executes the method executed by the terminal device or the relay terminal device in any of the above method embodiments.
  • An embodiment of the present application also provides a communication device, including a processor and a memory.
  • 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 communication device executes the execution of the terminal device or the relay terminal device in any of the above method embodiments. method.
  • each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the aforementioned processors may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components .
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • the methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on a computer, the computer is made to execute the steps shown in FIGS. 7 to 12 .
  • the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores program codes, and when the program codes are run on a computer, the computer executes 7 to FIG. 12 The method performed by the terminal device in the illustrated embodiment or the method performed by the relay terminal device.
  • the present application further provides a system, which includes the aforementioned one or more terminal devices, one or more relay terminal devices, and one or more network devices.
  • the relay terminal device in each of the above device embodiments completely corresponds to the relay terminal device or terminal device in the terminal device and method embodiments, and corresponding steps are performed by corresponding modules or units, for example, a communication unit (transceiver) performs method implementation.
  • a communication unit transmits method implementation.
  • other steps other than sending and receiving can be performed by a processing unit (processor).
  • processors For functions of specific units, reference may be made to corresponding method embodiments.
  • the number of processors may be one or more.
  • the terminal device may be an example of a receiving device
  • the relay terminal device may be an example of a transmitting device.
  • both the transmitting device and the receiving device may be terminal devices or the like. This application does not limit the specific types of the sending device and the receiving device.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device may be components.
  • One or more components may reside within a process and/or thread of execution, and a component may be localized on one computer and/or distributed between 2 or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals) Communicate through local and/or remote processes.
  • data packets eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to 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 disk and other media that can store program codes .

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Abstract

本申请提供了一种中继终端装置选择的方法、数据传输的方法以及装置，适用于D2D领域、V2X、车联网、智能驾驶或辅助驾驶等领域，通过对在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上进行测量，选择第一目标中继终端装置，从而提升中继终端装置选择的可靠性。该方法包括：终端装置在PSCCH以及PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，在接收到用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置的发现M个指示信息后，根据对第一测量结果集合进行滤波得到的第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置。

Description

一种中继终端装置选择的方法、数据传输的方法以及装置 技术领域
本申请实施例涉及通信领域，尤其涉及一种中继终端装置选择的方法、数据传输的方法以及装置。
背景技术
随着无线通信技术的发展，人们对高数据速率和用户体验的需求日益增长，同时人们对了解周边人或事物并与之通信的邻近服务的需求逐渐增加，因此设备到设备(Device-to-Device，D2D)技术应运而生。D2D技术的应用，可以减轻蜂窝网络的负担、减少用户设备的电池功耗、提高数据速率，并能很好地满足邻近服务的需求。D2D技术允许多个支持D2D功能的用户设备(User Equipment，UE)在有网络基础设施或无网络基础设施的情况下进行直接发现和直接通信。无线中继通信是无线通信组网的一种形式，可以有效地扩大网络的覆盖范围，其中信源到信宿的传输可能存在一个或多个中继节点对数据进行转发。具体可以包括用户设备到网络的中继(UE-to-Network relay)传输和用户设备到用户设备的中继(UE-to-UE relay)传输，而在中继传输中通常需要进行侧行链路中继(relay)UE选择/重选。
目前，在长期演进(Long Term Evolution，LTE)系统中，侧行链路中继终端装置选择/重选机制，需要利用LTE中的物理侧行链路发现信道(Physical Sidelink Discovery Channel，PSDCH)和侧行链路发现参考信号接收功率(Sidelink Discovery Reference Signal Received Power，SD-RSRP)测量结果进行中继终端装置选择/重选。
然而，由于新空口(new radio，NR)系统协议中侧行链路(Sidelink，SL)上物理层没有PSDCH，因此无法利用PSDCH信道上对参考信号的测量来获取RSRP的测量结果，导致NR中中继终端装置选择/重选机制无法工作，从而降低中继终端装置选择的可靠性。
发明内容
本申请实施例提供了一种中继终端装置选择的方法、数据传输的方法以及装置，用于在D2D领域、V2X、车联网、智能驾驶或辅助驾驶等领域，没有PDSCH可用的情况下，进行中继终端装置选择，从而提升中继终端装置选择的可靠性。
第一方面，本申请提供了一种中继终端装置选择的方法。该方法可以由终端装置执行，或者也可以由配置于终端装置中的芯片执行，本申请对此不作限定。该方法包括：终端装置在物理侧行链路控制信道(Physical Sidelink Control Channel，PSCCH)以及物理侧行链路共享信道(Physical Sidelink Shared Channel，PSSCH)中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，N为正整数，该PSSCH是PSCCH指示的，然后从N个中继终端装置接收M个发现指示信息，M个发现指示信息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，而M小于或等于N，且M为正整数，进而对第一测量结果集合中的一个第一测量结果进行滤波得到第一滤波结果集合，再根据第一滤波结果集合，从M个第一备选中继终端装置中选择 第一目标中继终端装置。具体地，终端装置可以在接收到发现指示信息后，对第一测量结果集合中最新的第一测量结果进行滤波得到第一滤波结果集合，并根据从M个第一备选中继终端装置中选择第一目标中继终端装置。其次，当终端装置也可以一直对第一测量结果集合中的第一测量结果进行滤波，从而得到多个第一滤波结果集合，而终端装置在接收到发现指示信息后，从多个第一滤波结果集合确定最新的得到的第一滤波结果集合，用于选择第一目标中继终端装置。具体获取第一滤波结果集合的方式此处不做限定。
在该实施方式中，可以D2D领域、V2X、车联网、智能驾驶或辅助驾驶等领域，没有PDSCH可用的情况下，在PSCCH以及PSSCH中至少一个信道上进行测量，并且基于测量结果集合得到滤波结果集合，从而根据滤波结果集合进行中继终端装置选择，从而提升中继终端装置选择的可靠性。
在本申请的一种可选实施方式中，第一测量量为PSCCH的物理侧行链路控制信道参考信号接收功率(Physical Sidelink Control Channel Reference Signal Received Power，PSCCH-RSRP)，或者，第一测量量为PSCCH所指示的PSSCH的物理侧行链路共享信道参考信号接收功率(Physical Sidelink Shared Channel Reference Signal Received Power，PSSCH-RSRP)，或者，第一测量量为PSCCH以及该PSCCH所指示的PSSCH上所有解调参考信号(Demodulation Reference Signal，DMRS)所占资源粒子(Resource Element，RE)功率的线性平均值，或者，第一测量量为PSCCH的PSCCH-RSRP以及该PSCCH所指示的PSSCH的PSSCH-RSRP的加权平均值。
在该实施方式中，第一测量量可以为与PSCCH或PSSCH中至少一项相关的不同测量量，由此提升对第一测量量进行测量的灵活性，其次，由于第一测量量与PSCCH或PSSCH中至少一项相关，因此终端装置在PSCCH以及PSSCH中至少一个信道上进行测量得到的第一测量结果集合能够更准确，从而提升后续确定第一滤波结果集合的准确度，提升选择第一目标中继终端装置的准确度。
在本申请的一种可选实施方式中，加权平均值的加权平均系数为网络设备配置的，或，预配置的，或，第一预设值。
在该实施方式中，当第一测量量为PSCCH的PSCCH-RSRP以及该PSCCH所指示的PSSCH的PSSCH-RSRP的加权平均值时，加权平均值的加权平均系数可通过不同的方式进行配置或设置，提升第一测量量的灵活性，从而提升本方案的灵活性。
在本申请的一种可选实施方式中，终端装置接收N个PSCCH所指示的PSSCH，其中，N个PSSCH中有M个PSSCH携带发现指示信息。
在该实施方式中，提供了一种接收发现指示信息的方式，在终端装置所接收的PSCCH所指示的PSSCH中存在至少一个PSSCH携带发现指示信息，即终端装置可确定接收到发现指示信息，由此提升本方案的可行性。
在本申请的一种可选实施方式中，终端装置接收N个侧行链路侧行控制信息(Sidelink Sidelink Control Information，SL SCI)，其中，N个SL SCI中有M个SL SCI包含显示指示域，显示指示域用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置。例如，显示指示域可以用SL SCI中的1bit进行指示，当1bit的显示指示域值为1时，可以确定SL SCI用于中继终端装置的发现功能，即终端装置可以根据 该发现指示信息确定发送该SL SCI的中继终端装置为第一备选中继终端装置。其次，当1bit的显示指示域值为0时，可以确定SL SCI用于通信功能，即终端装置可以根据该指示信息确定发送该SL SCI的中继终端装置不是第一备选中继终端装置。
或者，终端装置接收N个SL SCI，其中，N个SL SCI中有M个SL SCI包含解扰字段，解扰字段用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，解扰字段是对SL SCI中的字段进行解扰得到的。例如，隐式指示域可以用SL SCI中的1比特通过解扰进行指示，当最后1bit解扰后得到解扰字段1时，基于解扰字段可以确定SL SCI用于中继终端装置的发现功能，即终端装置可以根据该发现指示信息确定发送该SL SCI的中继终端装置为第一备选中继终端装置。其次，最后1bit解扰后得到的解扰字段0时，基于解扰字段可以确定SL SCI用于通信功能，即终端装置可以根据该指示信息确定发送该SL SCI的中继终端装置不是第一备选中继终端装置。
在该实施方式中，提供了另一种接收发现指示信息的方式，在终端装置所接收SL SCI中存在至少一个SL SCI携带包含显示指示域，即终端装置可确定接收到发现指示信息，或者，在终端装置所接收SL SCI中存在至少一个SL SCI携带包含解扰字段，终端装置也可确定接收到发现指示信息，由此可以基于显示指示域以及解扰字段判断是否接收到发现指示信息，由此提升本方案的可行性，并且提升本方案的灵活性。
在本申请的一种可选实施方式中，SL SCI包括第一阶段侧行链路侧行控制信息1st stage SCI和/或第二阶段侧行链路侧行控制信息2nd stage SCI。
在该实施方式中，由于SL SCI包括1st stage SCI和/或2nd stage SCI，因此终端装置可以通过1st stage SCI接收发现指示信息，或者通过2nd stage SCI接收发现指示信息，或者通过1st stage SCI以及2nd stage SCI接收发现指示信息，由此提升本方案的灵活性。
在本申请的一种可选实施方式中，终端装置将第一测量结果集合缓存至物理层，因此当终端装置从N个中继终端装置接收M个发现指示信息时，则终端装置从物理层获取第一测量结果集合。
在该实施方式中，终端装置将第一测量结果集合缓存至物理层，因此当终端装置从N个中继终端装置接收M个发现指示信息时，从物理层获取第一测量结果集合，再对第一测量结果集合进行滤波得到第一滤波结果集合，在终端装置未接收发现指示信息时，不进行滤波处理，从而降低终端装置的处理功率，进而降低本方案的功率消耗。
在本申请的一种可选实施方式中，终端装置还可以在获取到第一测量结果集合后，连续对第一测量结果集合中的多个第一测量结果进行滤波，从而得到多个第一滤波结果集合，然后将多个滤波结果集合缓存至高层，当终端装置接收到发现指示信息时，直接从高层获取最新的第一滤波结果集合。在该实施方式中所介绍的高层可以为层二(Layer 2，L2)或者层三(Layer 3，L3)，具体此处不做限定。具体地，L2为MAC层，而L3为RRC层。
在该实施方式中，终端装置将第一滤波结果集合缓存至高层，因此当终端装置从N个中继终端装置接收M个发现指示信息时，直接从高层获取第一滤波结果集合，从而提升本方案的可靠性。
在本申请的一种可选实施方式中，缓存对应的缓存时间为网络设备配置的，或，预配置的，或，为第二预设值。一种可能的实现方式中，缓存对应的缓存时间包括最小值，用于指示第一测量结果集合能够在物理层保存的最短时间，在该情况下，若缓存时间为50毫秒(ms)，即指示第一测量结果集合需要在物理层至少保存50ms。另一种可能的实现方式中，缓存对应的缓存时间包括最大值，用于指示第一测量结果集合能够在物理层保存的最长时间，在该情况下，若缓存时间为500ms，即指示第一测量结果集合需要在物理层最长保存500ms。其次，另一种可能的实现方式中，缓存对应的缓存时间包括最小值以及最大值，通过最大值以及最小值可以指示第一测量结果集合在物理层保存的时间范围，在该情况下，若缓存时间最小值为50ms，而缓存时间最大值为500ms，即指示第一测量结果集合可以在物理层保存50ms至500ms。可以理解的是，前述示例仅用于理解本方案，具体缓存时间需要根据实际情况灵活确定，本方案不对此进行限定。
在该实施方式中，可以通过不同的方式确定缓存对应的缓存时间，提升本方案的可行性，其次，通过缓存时间包括最大值和/或最小值，可以确定缓存时间的保存的范围，避免终端装置在缓存过程中长时间保存第一测量结果集合，占用不必要的内存，提升终端装置的内存利用率。
在本申请的一种可选实施方式中，终端装置将第一滤波结果集合中的滤波值最大的第一滤波结果，确定为第一目标滤波结果，并从M个第一备选中继终端装置中，确定第一目标滤波结果对应的第一备选中继终端装置为第一目标中继终端装置。具体地，终端装置选定满足中继终端装置候选准则，且PC5链路质量最好的中继终端装置，作为第一目标中继终端装置。本申请实施例中，PC5链路质量用第一滤波结果集合衡量，PC5链路质量最好对应的第一滤波结果的滤波值最大。
在该实施方式中，提供了一种确定第一目标中继终端装置的方式，由于PC5链路质量最好对应的第一滤波结果的滤波值最大，因此将滤波值最大的第一滤波结果对应的第一备选中继终端装置确定为第一目标中继终端装置，即第一目标中继终端装置的PC5链路质量最好，能够更好的与终端装置建立通信并且传输数据，从而提升本方案的可行性以及可靠性。
在本申请的一种可选实施方式中，终端装置从第一滤波结果集合中，获取M个第一备选中继终端装置对应的M个第一滤波结果，当M个第一滤波结果中存在第二目标滤波结果大于第一阈值，则终端装置确定第二目标滤波结果对应的第一备选中继终端装置为第一目标中继终端装置。其中，第一阈值为q-RxLevMin，且终端装置在覆盖内(in coverage)状态时，第一阈值包含在无线资源控制层(Radio Resource Control，RRC)信令的reselectionInfoIC字段中，其次，终端装置在覆盖外(out of coverage)状态时，第一阈值包含在RRC信令的的reselectionInfoOoC中。
在该实施方式中，提供了另一种确定第一目标中继终端装置的方式，通过于第一阈值的对比确定第一目标中继终端装置，并且终端装置在不同状态时，第一阈值包含在不同字段中，从提升本方案的灵活性。
在本申请的一种可选实施方式中，终端装置处于侧行链路第二模式SL Mode 2，且终端装置可以根据第一测量结果集合进行资源感知。
在该实施方式中，当终端装置处于SL Mode 2时，终端装置可以获得第一测量结果集合，当终端装置处于SL Mode 2且进行relay UE选择/重选时，终端装置可以利用第一测量结果集合获得第一滤波结果集合，由此提升本方案的可行性。
在本申请的一种可选实施方式中，终端装置为用于侧行链路SL通信的服务频率在覆盖外的终端装置，或者，终端装置为由用于SL通信的服务频率，且驻留小区或主小区的接收功率测量低于第二阈值的终端装置，该第二阈值为threshHigh，且第二阈值为预配置的。
在该实施方式中，由于终端装置为满足以上至少一个条件的终端装置，由此终端装置成为远端UE(remote UE)或信源UE，即进入remote UE状态或source UE状态。因此，终端装置处于中继UE发现阶段，可以接收到N个中继终端装置发送的PSCCH，以及该PSCCH所指示的PSSCH，从而使得终端装置可以在PSCCH以及PSSCH中至少一个信道上进行测量，由此提升方案的可行性。
在本申请的一种可选实施方式中，发现指示信息为通告消息，应答消息，直接通信接受消息，侧行链路媒体介入控制层控制单元SL MAC CE的字段或SL MAC CE的指示域中任一项。
在该实施方式中，终端装置可以从多种形式的消息，字段或者指示域中确定接收到发现指示信息，由此提升本方案的灵活性。
第二方面，本申请提供了一种数据传输的方法。该方法可以由中继终端装置执行，或者也可以由配置于中继终端装置中的芯片执行，本申请对此不作限定。该方法包括：中继终端装置向终端装置发送发现指示信息，该发现指示信息用于指示中继终端装置为第一备选中继终端装置，当终端装置选择中继终端装置为第一目标中继终端装置时，则中继终端装置向目标装置传输终端装置发送的数据,其中，第一目标中继终端装置是根据第一滤波结果集合从M个第一备选中继终端装置中选择的，第一滤波结果集合是对第一测量结果集合中的一个第一测量结果进行滤波得到的，第一测量结果集合是在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量得到的，N、M均为正整数，M小于或等于N。
在该实施方式中，可以D2D领域、V2X、车联网、智能驾驶或辅助驾驶等领域，没有PDSCH可用的情况下，在PSCCH以及PSSCH中至少一个信道上进行测量，并且基于测量结果集合得到滤波结果集合，从而根据滤波结果集合进行中继终端装置选择，由此提升中继终端装置选择的可靠性，因此被选择的中继终端装置能够与终端装置建立通信连接，从而向目标装置传输终端装置发送的数据，从而提升数据传输的可靠性。
在本申请的一种可选实施方式中，第一测量量为PSCCH的PSCCH-RSRP，或者，第一测量量为PSCCH所指示的PSSCH的PSSCH-RSRP，或者，第一测量量为PSCCH以及该PSCCH所指示的PSSCH上所有DMRS所占RE功率的线性平均值，或者，第一测量量为PSCCH的PSCCH-RSRP以及该PSCCH所指示的PSSCH的PSSCH-RSRP的加权平均值。
在该实施方式中，第一测量量可以为与PSCCH或PSSCH中至少一项相关的不同测量量，由此提升对第一测量量进行测量的灵活性，其次，由于第一测量量与PSCCH或PSSCH中至少一项相关，因此终端装置在PSCCH以及PSSCH中至少一个信道上进行测量得到的第一测量结果集合能够更准确，从而提升后续确定第一滤波结果集合的准确度，提升选择第 一目标中继终端装置的准确度。
在本申请的一种可选实施方式中，加权平均值的加权平均系数为网络设备配置的，或，预配置的，或，第一预设值。
在该实施方式中，当第一测量量为PSCCH的PSCCH-RSRP以及该PSCCH所指示的PSSCH的PSSCH-RSRP的加权平均值时，加权平均值的加权平均系数可通过不同的方式进行配置或设置，提升第一测量量的灵活性，从而提升本方案的灵活性。
在本申请的一种可选实施方式中，中继终端装置向终端装置发送PSCCH所指示的PSSCH，其中，PSSCH携带发现指示信息。
在该实施方式中，提供了一种接收发现指示信息的方式，在中继终端装置所发送的PSCCH所指示的PSSCH中存在至少一个PSSCH携带发现指示信息，使得终端装置可确定接收到发现指示信息，由此提升本方案的可行性。
在本申请的一种可选实施方式中，中继终端装置向终端装置发送SL SCI，该SL SCI包含显示指示域，显示指示域用于指示中继终端装置为第一备选中继终端装置，或，中继终端装置向终端装置发送SL SCI，其中，SL SCI包含解扰字段，解扰字段用于指示中继终端装置为第一备选中继终端装置，解扰字段是对SL SCI中的字段进行解扰得到的。
在该实施方式中，提供了另一种接收发现指示信息的方式，在中继终端装置所发送的SL SCI中存在至少一个SL SCI携带包含显示指示域，使得终端装置可确定接收到发现指示信息，或者，在终端装置所发送的SL SCI中存在至少一个SL SCI携带包含解扰字段，使得终端装置可确定接收到发现指示信息，由此可以基于显示指示域以及解扰字段判断是否接收到发现指示信息，由此提升本方案的可行性，并且提升本方案的灵活性。
在本申请的一种可选实施方式中，SL SCI包括1st stage SCI和/或2nd stage SCI。
在该实施方式中，由于SL SCI包括1st stage SCI和/或2nd stage SCI，使得终端装置可以通过1st stage SCI接收发现指示信息，或者通过2nd stage SCI接收发现指示信息，或者通过1st stage SCI以及2nd stage SCI接收发现指示信息，由此提升本方案的灵活性。
在本申请的一种可选实施方式中，第一目标中继终端装置为第一目标滤波结果对应的第一备选中继终端装置，第一目标滤波结果是第一滤波结果集合中的滤波值最大的第一滤波结果。本申请实施例中，PC5链路质量用第一滤波结果集合衡量，PC5链路质量最好对应的第一滤波结果的滤波值最大。
在该实施方式中，由于PC5链路质量最好对应的第一滤波结果的滤波值最大，因此将滤波值最大的第一滤波结果对应的第一备选中继终端装置确定为第一目标中继终端装置，即第一目标中继终端装置的PC5链路质量最好，因此中继终端装置能更好的与终端装置建立通信并且传输数据，从而提升本方案的可行性以及可靠性。
在本申请的一种可选实施方式中，第一目标中继终端装置为第二目标滤波结果对应的第一备选中继终端装置，第二目标滤波结果大于第一阈值。其中，第一阈值为q-RxLevMin，且终端装置在覆盖内(in coverage)状态时，第一阈值包含在无线资源控制层(Radio Resource Control，RRC)信令的reselectionInfoIC字段中，其次，终端装置在覆盖外(out of coverage)状态时，第一阈值包含在RRC信令的的reselectionInfoOoC 中。
在该实施方式中，通过于第一阈值的对比确定第一目标中继终端装置，并且终端装置在不同状态时，第一阈值包含在不同字段中，从提升本方案的灵活性。
在本申请的一种可选实施方式中，终端装置为用于侧行链路SL通信的服务频率在覆盖外的终端装置，或者，终端装置为由用于SL通信的服务频率，且驻留小区或主小区的接收功率测量低于第二阈值的终端装置，该第二阈值为threshHigh，且第二阈值为预配置的。
在该实施方式中，由于终端装置为满足以上至少一个条件的终端装置，由此终端装置成为远端UE(remote UE)或信源UE，即进入remote UE状态或source UE状态。因此，终端装置处于中继UE发现阶段，中继终端装置可以向该终端装置发送PSCCH，以及该PSCCH所指示的PSSCH，从而使得终端装置可以在PSCCH以及PSSCH中至少一个信道上进行测量，由此提升方案的可行性。
在本申请的一种可选实施方式中，发现指示信息为通告消息，应答消息，直接通信接受消息，侧行链路媒体介入控制层控制单元SL MAC CE的字段或SL MAC CE的指示域中任一项。
在该实施方式中，中继终端装置可以从多种形式的消息，字段或者指示域中携带发现指示信息，由此提升本方案的灵活性。
在本申请的一种可选实施方式中，目标装置传输包括接收终端装置和/或网络装置。该接收终端装置为信宿UE(destination UE)。具体地，若应用于用户设备到网络的中继(UE-to-Network relay)传输场景，则中继终端设备向网络装置传输数据，若应用于户设备到用户设备的中继(UE-to-UE relay)传输场景，则中继终端设备向接收终端装置传输数据。
在该实施方式中，在不同的应用场景中，中继终端装置基于应用场景以及系统向接收终端装置和/或网络装置传输终端装置发送的数据，提升本方案的可行性。
第三方面，提供了一种通信装置。该通信装置具有实现上述第一方面以及第一方面中任一种可能实现方式中所述的终端装置的部分或全部功能。比如，装置的功能可具备本申请中终端装置的部分或全部实施例中的功能，也可以具备单独实施本申请中的任一个实施例的功能。所述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或模块。
在一种可能的设计中，该通信装置的结构中可包括处理模块和通信模块，所述处理模块被配置为支持通信装置执行上述方法中相应的功能。所述通信模块用于支持通信装置与其他设备之间的通信。所述通信装置还可以包括存储模块，所述存储模块用于与处理模块和通信模块耦合，其保存通信装置必要的程序指令和数据。
一种实施方式中，所述通信装置包括：
处理模块，用于在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数；
收发模块，用于从N个中继终端装置接收M个发现指示信息，其中，M个发现指示信 息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数；
处理模块，还用于根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置，其中，第一滤波结果集合是对第一测量结果集合中的一个第一测量结果进行滤波得到的。
该实施方式的相关内容可参见上述第一方面的相关内容，此处不再详述。
作为示例，处理模块可以为处理器或者处理单元，收发模块可以为收发器，通信接口或通信单元，存储模块可以为存储器或存储单元。
另一种实施方式中，所述通信装置，可包括：
处理器，用于在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数；
收发器，用于从N个中继终端装置接收M个发现指示信息，其中，M个发现指示信息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数；
处理器，还用于根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置，其中，第一滤波结果集合是对第一测量结果集合中的一个第一测量结果进行滤波得到的。
该实施方式的相关内容可参见上述第一方面的相关内容，此处不再详述。
在实现过程中，处理器可用于进行，例如但不限于，基带相关处理，收发器可用于进行，例如但不限于，射频收发。上述器件可以分别设置在彼此独立的芯片上，也可以至少部分的或者全部的设置在同一块芯片上。例如，处理器可以进一步划分为模拟基带处理器和数字基带处理器。其中，模拟基带处理器可以与收发器集成在同一块芯片上，数字基带处理器可以设置在独立的芯片上。随着集成电路技术的不断发展，可以在同一块芯片上集成的器件越来越多。例如，数字基带处理器可以与多种应用处理器(例如但不限于图形处理器，多媒体处理器等)集成在同一块芯片之上。这样的芯片可以称为系统芯片(System on Chip)。将各个器件独立设置在不同的芯片上，还是整合设置在一个或者多个芯片上，往往取决于产品设计的需要。本申请实施例对上述器件的实现形式不做限定。
第四方面，提供了一种通信装置，包括处理器。该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中任一种可能实现方式中的方法。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，所述通信接口用于输入和/或输出信息，所述信息包括指令和数据中的至少一项。
在一种实现方式中，该通信装置为终端装置。当该通信装置为终端装置时，所述通信接口可以是收发器，或，输入/输出接口。
可选地，所述收发器可以为收发电路。可选地，所述输入/输出接口可以为输入/输出电路。
在另一种实现方式中，该通信装置为配置于终端装置中的芯片或芯片系统。当该通信装置为配置于终端装置中的芯片或芯片系统时，所述通信接口可以是输入/输出接口、接口 电路、输出电路、输入电路、管脚或相关电路等。所述处理器也可以体现为处理电路或逻辑电路。
第五方面，提供了一种通信装置。该通信装置具有实现上述第二方面以及第二方面中任一种可能实现方式中所述的中继终端装置的部分或全部功能。比如，装置的功能可具备本申请中中继终端装置的部分或全部实施例中的功能，也可以具备单独实施本申请中的任一个实施例的功能。所述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或模块。
在一种可能的设计中，该通信装置的结构中可包括处理模块和收发模块，所述处理模块被配置为支持通信装置执行上述方法中相应的功能。所述收发模块用于支持通信装置与其他设备之间的通信。所述通信装置还可以包括存储模块，所述存储模块用于与处理模块和收发模块耦合，其保存通信装置必要的程序指令和数据。
一种实施方式中，所述通信装置包括：
收发模块，用于向终端装置发送发现指示信息，其中，发现指示信息用于指示通信装置为第一备选中继终端装置；
收发模块，还用于当终端装置选择通信装置为第一目标中继终端装置时，则向目标装置传输终端装置发送的数据，其中，第一目标中继终端装置是根据第一滤波结果集合从M个第一备选中继终端装置中选择的，第一滤波结果集合是对第一测量结果集合中的一个第一测量结果进行滤波得到的，第一测量结果集合是在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个通信装置的第一测量量进行测量得到的，N、M均为正整数，M小于或等于N。
该实施方式的相关内容可参见上述第二方面的相关内容，此处不再详述。
作为示例，处理模块可以为处理器或者处理单元，收发模块可以为收发器，通信接口或通信单元，存储模块可以为存储器或存储单元。
另一种实施方式中，所述通信装置，可包括：
收发器，用于向终端装置发送发现指示信息，其中，发现指示信息用于指示通信装置为第一备选中继终端装置；
收发器，还用于当终端装置选择通信装置为第一目标中继终端装置时，则向目标装置传输终端装置发送的数据，其中，第一目标中继终端装置是根据第一滤波结果集合从M个第一备选中继终端装置中选择的，第一滤波结果集合是对第一测量结果集合中的一个第一测量结果进行滤波得到的，第一测量结果集合是在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个通信装置的第一测量量进行测量得到的，N、M均为正整数，M小于或等于N。
该实施方式的相关内容可参见上述第二方面的相关内容，此处不再详述。
第六方面，提供了一种通信装置，包括处理器。该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述第二方面中任一种可能实现方式中的方法。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，所述通信接口用于输入和/或输出信息，所述信息包括指令和数据中的至少一项。
在一种实现方式中，该通信装置为中继终端装置。当该通信装置为中继终端装置时， 所述通信接口可以是收发器，或，输入/输出接口。
可选地，所述收发器可以为收发电路。可选地，所述输入/输出接口可以为输入/输出电路。
在另一种实现方式中，该通信装置为配置于中继终端装置中的芯片或芯片系统。当该通信装置为配置于中继终端装置中的芯片或芯片系统时，所述通信接口可以是输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。所述处理器也可以体现为处理电路或逻辑电路。
第七方面，提供了一种处理器，包括：输入电路、输出电路和处理电路。所述处理电路用于通过所述输入电路接收信号，并通过所述输出电路发射信号，使得所述处理器执行上述第一方面和第二方面中任一种可能实现方式中的方法。
在具体实现过程中，上述处理器可以为芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请实施例对处理器及各种电路的具体实现方式不做限定。
第八方面，提供了一种通信装置，包括通信接口和处理器。所述通信接口与所述处理器耦合。所述通信接口用于输入和/或输出信息。所述信息包括指令和数据中的至少一项。所述处理器用于执行计算机程序，以使得所述通信装置执行第一方面和第二方面中任一种可能实现方式中的方法。
可选地，所述处理器为一个或多个，所述存储器为一个或多个。
第九方面，提供了一种通信装置，包括处理器和存储器。该处理器用于读取存储器中存储的指令，并可通过接收器接收信号，通过发射器发射信号，以使得所述装置执行第一方面和第二方面中任一种可能实现方式中的方法。
可选地，所述处理器为一个或多个，所述存储器为一个或多个。
可选地，所述存储器可以与所述处理器集成在一起，或者所述存储器与处理器分离设置。
在具体实现过程中，存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
应理解，相关的信息交互过程，例如发送指示信息可以为从处理器输出指示信息的过程，接收指示信息可以为向处理器输入接收到的指示信息的过程。具体地，处理输出的信息可以输出给发射器，处理器接收的输入信息可以来自接收器。其中，发射器和接收器可以统称为收发器。
上述第八方面和第九方面中的通信装置可以是芯片，该处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来 实现，该存储器可以集成在处理器中，可以位于该处理器之外，独立存在。
第十方面，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(也可以称为代码，或指令)，当所述计算机程序被运行时，使得计算机执行上述第一方面和第二方面中任一种可能实现方式中的方法。
第十一方面，提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序(也可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述第一方面和第二方面中任一种可能实现方式中的方法。
第十二方面，提供了一种通信系统，包括前述的终端装置和中继终端装置。
第十三方面，本申请提供了一种芯片系统，该芯片系统包括处理器和接口，所述接口用于获取程序或指令，所述处理器用于调用所述程序或指令以实现或者支持终端装置实现第一方面所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。
在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存终端装置必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十四面，本申请提供了一种芯片系统，该芯片系统包括处理器和接口，所述接口用于获取程序或指令，所述处理器用于调用所述程序或指令以实现或者支持中继终端装置实现第二方面所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。
在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存中继终端装置必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
需要说明的是，本申请第三方面至第十四方面的实施方式所带来的有益效果可以参照第一方面与第二方面的实施方式进行理解，因此没有重复赘述。
通过本申请提供的技术方案，终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，再从N个中继终端装置接收M个发现指示信息，M个发现指示信息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，最后根据对第一测量结果集合进行滤波得到的第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置，从而完成在D2D领域、V2X、车联网、智能驾驶或辅助驾驶等领域，没有PDSCH可用的情况下，进行中继终端装置选择。
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图1为本申请实施例中系统框架的一个示意图；
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图4为本申请实施例中发现流程中模式A的一个示意图；
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图7为本申请实施例中中继终端装置选择的方法一个实施例的示意图；
图8为本申请实施例中中继终端装置选择的方法另一实施例的示意图；
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图13为本申请实施例中通信装置的一个实施例示意图；
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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。
本申请实施例的技术方案可以应用于各种通信系统，例如：LTE系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)。随着通信系统的不断发展，本申请的技术方案可应用于第五代(5th generation，5G)系统或新无线(new radio，NR)，还可应用于未来网络，如6G系统甚至未来系统；或者还可用于D2D系统，机器到机器(machine to machine，M2M)系统等等。
应理解，该通信系统中的网络装置可以是任意一种具有无线收发功能的设备或可设置于该设备的芯片，该设备包括但不限于：LTE系统中的演进型节点B(evolved Node B，eNB)、无线网络控制器(Radio Network Controller，RNC)、节点B(Node B，NB)、基站控制器(Base Station Controller，BSC)、基站收发台(Base Transceiver Station，BTS)、家庭基站(例如，Home evolved NodeB，或Home Node B，HNB)、基带单元(BaseBand Unit，BBU)，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(TRP)等，还可以为5G、6G甚至未来系统中使用的设备，如NR系统中的基站(gNodeB或gNB)或收发点(transmission receiving point/transmission reception point，TRP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板。且基站可以是：宏基站，微基站，微微基站，小站，中继站，或，气球站等。或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)，或微微基站(Picocell)，或毫微微基站(Femtocell)，或，车联网(vehicle to everything，V2X)或者智能驾驶场景中的路侧单元(road side unit，RSU)等。
多个基站可以支持上述提及的同一种技术的网络，也可以支持上述提及的不同技术的网络。基站可以包含一个或多个共站或非共站的TRP。网络装置还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized  unit，CU)，和/或分布单元(distributed unit,DU)。网络装置还可以是服务器，可穿戴设备，或车载设备等。以下以网络装置为基站为例进行说明。所述多个网络装置可以为同一类型的基站，也可以为不同类型的基站。基站可以与终端装置进行通信，也可以通过中继站与终端装置进行通信。终端装置可以与不同技术的多个基站进行通信，例如，终端装置可以与支持LTE网络的基站通信，也可以与支持5G网络的基站通信，还可以支持与LTE网络的基站以及5G网络的基站的双连接。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括射频单元(radio unit，RU)。CU实现gNB的部分功能，DU实现gNB的部分功能，比如，CU实现无线资源控制(radio resource control，RRC)层，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能，DU实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理层(physical layer，PHY)的功能。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层信令或PHCP层信令，也可以认为是由DU发送的，或者，由DU+RU发送的。可以理解的是，网络装置可以为CU节点、或DU节点、或包括CU节点和DU节点的设备。此外，CU可以划分为接入网RAN中的网络装置，也可以将CU划分为核心网CN中的网络装置，在此不做限制。
本申请公开的实施例中，用于实现网络装置的功能的装置可以是网络装置；也可以是能够支持网络装置实现该功能的装置，例如芯片系统，该装置可以被安装在网络装置中。
还应理解，该通信系统中的终端装置是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、车载终端设备、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、可穿戴终端设备，前述的V2X车联网中的无线终端或无线终端类型的RSU等等。本申请的实施例对应用场景不做限定。终端装置有时也可以称为终端设备、UE、接入终端设备、车载终端、工业控制终端、UE单元、UE站、移动站、移动台、远方站、远程终端设备、移动设备、UE终端设备、无线通信设备、UE代理或UE装置等。终端也可以是固定的或者移动的。
为了更好地理解本申请实施例公开的一种中继终端装置选择的方法、数据传输的方法以及装置，首先，对本发明实施例所使用的通信系统的系统架构进行描述。本发明主要应用于D2D、V2X、车联网、智能驾驶或辅助驾驶等终端装置和终端装置可以进行直接通信的系统中，且在该通信系统中允许多个终端装置在有网络基础设施或无网络基础设施的情况下进行直接发现和直接通信，因此本申请实施例公开的方法适用于有网络覆盖和无网络覆盖的通信场景。基于此，图1为本申请实施例中系统框架的一个示意图，如图1所示，在图1中(A)图中，该场景下通信系统包括终端装置A，终端装置B以及网络装置，其中终 端装置A需要搜索中继终端装置，并通过选定的中继终端装置(例如终端装置B)与网络装置进行通信。其次，在图1中(B)图中，该场景下通信系统包括终端装置A，终端装置B以及终端装置C，其中终端装置A需要搜索中继终端装置，并通过选定的中继终端装置(例如终端装置B)与终端装置C进行通信。
其次，对本申请实施例涉及到的一些术语或概念进行解释，以便于本领域技术人员理解。
一、UE-to-Network relay传输
图2为本申请实施例中用户设备到网络的中继传输系统架构的一个示意图，如图所示，UE-to-Network relay系统中的网元包括remote UE、relay UE和网络设备。其中remote UE和relay UE之间为PC5接口(PC5interface)，PC5接口指示用户设备与用户设备之间的通信接口，而relay UE和gNB之间为Uu接口(Uu interface)，e，Uu接口指用户设备与网络设备之间的通信接口。Relay UE可以帮助remote UE接入网络设备从而获取网络服务，包括remote UE和gNB之间的数据传输。
二、UE-to-UE relay传输
图3为本申请实施例中用户设备到用户设备的中继传输系统架构的一个示意图，如图所示，UE-to-UE relay系统中的网元包括source UE、relay UE和destination UE。其中source UE和relay UE之间为PC5接口，relay UE和destination UE之间为PC5接口。Relay UE可以帮助source UE与destination UE进行数据传输。
三、发现流程(Discovery procedure)
Discovery procedure用于临近UE之间通过PC5接口进行发现与被发现。在UE-to-Network relay或UE-to-UE relay中，discovery procedure可以用于remote UE(或source UE)和relay UE之间的发现。
Discovery procedure有两种模式，分别为模式A(Mode A)和模式B(Mode B)，图4为本申请实施例中发现流程中模式A的一个示意图，如图所示，Mode A中relay UE可以发送通告消息(Announcing message)，使得进行监测的remote UE A以及remote UE B可以通过Announcing message发现该relay UE。其次，图5为本申请实施例中发现流程中模式B的一个示意图，如图所示，Mode B中remote UE可以发送请求消息(Solicitation message)，若relay UE A可以帮助remote UE进行数据转发时，relay UE A会向remote UE发送应答消息(Response message)。
四、UE直接通信流程
UE直接通信流程，可以实现UE的直接发现，用于UE和UE之间的发现。图6为本申请实施例中直接通信流程的一个示意图，如图所示，UE A向UE B以及UE C发送直接通信请求(Direct Communication Request)消息，若UE C向UE A发送直接通信接受(Direct Communication Accept)消息，即可完成UE A和UE C直接的连接建立。
五、层3滤波(L3 Filtering)
L3 Filtering指示UE在用于评估报告标准或测量报告之前，利用公式(1)，对测量结果进行滤波：
F n＝(1-a)·F n-1+a·M n；    (1)
其中，F n指示用于评估报告标准或测量报告的更新的滤波后的测量结果，M n指示物理层的最新测量结果，F n-1指示旧的滤波测量结果，a＝1/2 (k/4)或a＝1/2 (ki/4)，k或ki指示滤波系数。
其次，层1(Layer 1，L1)指示协议栈中的物理层，当n为0时，F 0＝M 1指示物理层的首次获测量结果。
通过前述介绍可知，在LTE系统中的侧行链路中继终端装置选择/重选机制，需要利用在LTE中的PSDCH对SD-RSRP进行测量得到对应的测量结果才能进行中继终端装置选择/重选。然而，由于NR系统协议中SL物理层没有PSDCH，因此无法在PSDCH对SD-RSRP进行测量得到对应的测量结果，从而导致NR系统无法进行中继终端装置选择/重选机制。
为了解决上述问题，本申请实施例提供了一种中继终端装置选择的方法以及数据传输的方法，用于在D2D领域、V2X、车联网、智能驾驶或辅助驾驶等领域，没有PDSCH可用的情况下，进行中继终端装置选择。本申请实施例中，终端装置可通过不同的方式接收发现指示信息，即通过PSSCH接收发现指示信息，或者通过SL SCI接收发现指示信息，下面将基于不同接收发现指示信息的方式，对本申请实施例使用的中继终端装置选择的方法进行详细描述。
一、通过PSSCH接收发现指示信息。
请参阅图7，图7为本申请实施例中中继终端装置选择的方法一个实施例的示意图，如图所示，中继终端装置选择的方法包括如下步骤。
S101、终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数。
本实施例中，终端装置为用于侧行链路SL通信的服务频率在覆盖外的终端装置，或者，终端装置为由用于SL通信的服务频率，且驻留小区或主小区的接收功率测量低于第二阈值的终端装置，该第二阈值为threshHigh，且第二阈值为预配置的。
因此，终端装置成为remote UE或source UE，即进入remote UE状态或source UE状态。此时终端装置处于relay UE发现阶段，因此N个中继终端装置会向终端装置发送PSCCH，且还会向终端装置发送该PSCCH所指示的PSSCH，终端装置会在PSCCH以及PSSCH中至少一个信道上对第一测量量进行测量，得到第一测量结果集合，其中，N为正整数，即本实施例中中继终端装置的数量至少为1。
可选地，第一测量量为PSCCH的PSCCH-RSRP。或者，第一测量量为PSCCH所指示的PSSCH的PSSCH-RSRP。或者，第一测量量为PSCCH以及该PSCCH所指示的PSSCH的PSSCH上所有DMRS所占RE功率的线性平均值。或者，第一测量量为PSCCH的PSCCH-RSRP以及该PSCCH所指示的PSSCH的PSSCH-RSRP的加权平均值，PSCCH的PSCCH-RSRP以及该PSCCH所指示的PSSCH的PSSCH-RSRP的加权平均值可以通过公式(2)计算得到：
Y＝a*PSCCH-RSRP+b*PSSCH-RSRP；(2)
其中，Y指示PSCCH的PSCCH-RSRP以及该PSCCH所指示的PSSCH的PSSCH-RSRP的加权平均值，a指示第一加权平均系数，b指示第二加权平均系数。
具体地，该加权平均值的第一加权平均系数以及第二加权平均系数为网络设备配置的， 或，预配置的，或，第一预设值，具体此处不做限定。
可选地，中继终端装置可以周期性发送PSCCH，而周期性发送PSCCH的配置可以是网络装置配置的，或者预配置的，此处不做限定。具体地，周期性发送PSCCH的配置包括起始时刻T0和周期T，起始时刻T0和周期T用于终端装置的中继终端装置发现流程。
可选地，终端装置还可以处于侧行链路第二模式SL Mode 2，且终端装置可以根据第一测量结果集合进行资源感知。其次，终端装置可以根据第一测量结果集合进行资源感知是通过网络装置配置的或预配置的，具体此处不做限定。
S102、终端装置从N个中继终端装置接收M个发现指示信息，其中，M个发现指示信息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数。
本实施例中，N个中继终端装置中有M个中继终端装置向终端装置发送发现指示信息，发现指示信息用于指示该中继终端装置为第一备选中继终端装置，第一备选中继终端装置为可以帮助终端装置进行数据转发的终端装置。由此终端装置可以从N个中继终端装置中接收M个发现指示信息，并且基于M个发现指示信息确定M个第一备选中继终端装置，其中，M小于或等于N，M为正整数。
可选地，终端装置接收M个发现指示信息为终端装置接收N个PSCCH所指示的PSSCH，且N个PSSCH中有M个PSSCH携带发现指示信息。具体地，终端装置需要接收/译码N个PSCCH，然后再接收N个PSCCH所指示的PSSCH，并且对N个PSSCH进行译码，然后终端装置的高层确定N个PSSCH中有M个PSSCH携带发现指示信息，本实施中所介绍的高层可以为层二(Layer 2，L2)或者L3，具体此处不做限定。其次，L2为MAC层，而L3为RRC层。
示例性地，以N为4，且4个中继终端装置分别为中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D作为示例进行说明，中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D均向终端装置发送PSSCH，而中继终端装置A以及中继终端装置B所发送的PSSCH中携带发现指示信息，因此终端装置将中继终端装置A以及中继终端装置B确定为第一备选中继终端装置。
可选地，在一种可能的实现方式中，当终端装置处于Discovery procedure的Mode A时，发现指示信息为announcement message。另一种可能的实现方式中，当终端装置处于Discovery procedure的Mode B时，发现指示信息为response message。再一种可能的实现方式中，当终端装置处于UE直接通信流程时，发现指示信息为direct communication accept消息。其次，再一种可能的实现方式中，发现指示信息还可以为侧行链路媒体介入控制层控制单元(Sidelink Media Access Control Control Element，SL MAC CE)的字段或指示域。
可以理解的是，前述示例仅用于理解本方案，在不同的通信系统以及不同的应用场景中，接收发现指示信息以及发现指示信息的形态均不相同，本方案不对此进行限定。
S103、终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置，其中，第一滤波结果集合是对第一测量结果集合中的一个第一测量结果进行滤波得到的。
本实施例中，终端装置可以在接收到发现指示信息后，对第一测量结果集合中最新的 第一测量结果进行滤波得到第一滤波结果集合，并根据从M个第一备选中继终端装置中选择第一目标中继终端装置。其次，当终端装置也可以一直对第一测量结果集合中的第一测量结果进行滤波，从而得到多个第一滤波结果集合，而终端装置在接收到发现指示信息后，从多个第一滤波结果集合确定最新的得到的第一滤波结果集合，用于选择第一目标中继终端装置。具体获取第一滤波结果集合的方式此处不做限定。
具体地，滤波可以是层二滤波(L2 Filtering)，也可以是层三滤波，L2滤波在L2进行，而L3滤波在L3进行，L2滤波具体操作计算流程与L3滤波操作计算流程类似，L3滤波在前述实施例已进行介绍，在此不再赘述。
可选地，当终端装置处于SL Mode 2时，终端装置可以获得第一测量结果集合，当终端装置处于SL Mode 2且进行relay UE选择/重选时，终端装置可以利用第一测量结果集合获得第一滤波结果集合。
可选地，终端装置可以通过不同的方式从M个第一备选中继终端装置中选择第一目标中继终端装置，下面分别对本实施例中所提供的选择第一目标中继终端装置的方式进行介绍。
一种可能的实现方式中，终端装置将第一滤波结果集合中的滤波值最大的第一滤波结果，确定为第一目标滤波结果，并且从M个第一备选中继终端装置中，将第一目标滤波结果对应的第一备选中继终端装置确定为第一目标中继终端装置。具体地，终端装置选定满足中继终端装置候选准则，且PC5链路质量最好的中继终端装置，作为第一目标中继终端装置。本申请实施例中，PC5链路质量用第一滤波结果集合衡量，PC5链路质量最好对应的第一滤波结果的滤波值最大。
示例性地，M个第一备选中继终端装置对应M个第一滤波结果，且第一备选中继终端装置为中继终端装置A以及中继终端装置B，且中继终端装置A对应第一滤波结果A，中继终端装置B对应第一滤波结果B，当第一滤波结果B的滤波值大于第一滤波结果A的滤波值时，可以确定第一滤波结果B为第一目标滤波结果，且对应的中继终端装置B为第一目标中继终端装置。
另一种可能的实现方式中，终端装置从第一滤波结果集合中，获取M个第一备选中继终端装置对应的M个第一滤波结果，判断M个第一滤波结果中是否存在第二目标滤波结果大于第一阈值，若存在，将大于第一阈值的第二目标滤波结果对应的第一备选中继终端装置为第一目标中继终端装置。其中，第一阈值为q-RxLevMin，且终端装置在in coverage状态时，第一阈值包含在RRC信令的reselectionInfoIC字段中，其次，终端装置在out of coverage状态时，第一阈值包含在RRC信令的的reselectionInfoOoC中。
示例性地，终端装置选定第一备选中继终端装置(中继终端装置B)，然后从第一滤波结果集合中获取该第一备选中继终端装置对应的第一滤波结果，若第一滤波结果大于第一阈值，即该第一滤波结果为第二目标滤波结果，且对应的中继终端装置B为第一目标中继终端装置。
其次，当所选择的第一备选中继终端装置对应的第一滤波结果低于第一阈值时，或者，当高层(L2或L3)指示不使用所选择的第一备选中继终端装置时，终端装置需要继续在M个第一备选中继终端装置中进行选择，直至选择到对应的第一滤波结果大于第一阈值 的第一备选中继终端装置，并确定为第一目标中继终端装置。
可以理解的是，前述示例仅用于理解本方案，在不同的通信系统以及不同的应用场景中，选择第一目标中继终端装置的方式不相同，具体方式需要根据实际情况以及需求灵活确定，本方案不对此进行限定。
S104、终端装置与第一目标中继终端装置建立通信连接。
本实施例中，终端装置通过步骤S103确定第一目标中继终端装置后，可以与该第一目标中继终端装置建立通信连接。例如，若中继终端装置B通过步骤S103被确定为第一目标中继终端装置，则终端装置与中继终端装置B建立通信连接。
可以理解的是，前述示例仅用于理解本方案，终端装置具体与中继终端装置建立通信连接需要根据所确定的第一目标中继终端装置的实际情况确定，本方案不对此进行限定。
S105、中继终端装置向目标装置传输终端装置发送的数据。
本实施例中，当终端装置需要向目标装置传输数据时，需要先向被确定为第一目标中继终端装置的中继终端装置发送数据，然后该中继终端装置再向目标装置传输该数据，由此完成终端装置向目标装置的数据传输。例如，若中继终端装置B通过步骤S103被确定为第一目标中继终端装置，通过步骤S104使得终端装置与中继终端装置B建立通信连接后，当终端装置需要向目标装置传输数据时，终端装置会向中继终端装置B发送数据，然后中继终端装置B再向目标装置传输该数据。
可选地，目标装置传输为接收终端装置和/或网络装置，其中，接收终端装置为前述实施例中介绍的信宿UE。具体地，若应用于UE-to-Network relay传输场景，则中继终端设备向网络装置传输数据，若应用于UE-to-UE relay传输场景，中继终端设备向接收终端装置传输数据。
可以理解的是，前述示例仅用于理解本方案，终端装置具体向哪个中继终端装置发送数据需要根据所确定的第一目标中继终端装置的实际情况确定，本方案不对此进行限定。
二、通过SL SCI接收发现指示信息。
具体地，SL SCI包括1st stage SCI和/或2nd stage SCI，因此可以通过1st stage SCI接收发现指示信息，或者通过2nd stage SCI接收发现指示信息，或者通过1st stage SCI以及2nd stage SCI接收发现指示信息，下面分别对SL SCI包括1st stage SCI以及SL SCI包括2nd stage SCI的两种方式进行介绍，当SL SCI包括1st stage SCI和2nd stage SCI时，具体实施方式与1st stage SCI和2nd stage SCI分别接收发现指示信息的方式类似，在此不再进行介绍。
(1)SL SCI包括1st stage SCI
请参阅图8，图8为本申请实施例中中继终端装置选择的方法另一实施例的示意图，如图所示，中继终端装置选择的方法包括如下步骤。
S201、终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数。
本实施例中，终端装置为用于侧行链路SL通信的服务频率在覆盖外的终端装置，或者，终端装置为由用于SL通信的服务频率，且驻留小区或主小区的接收功率测量低于第二阈值 的终端装置，该第二阈值为threshHigh，且第二阈值为预配置的。其次，终端装置具体得到第一测量结果集合的方式与步骤S101类似，在此不再赘述。
S202、终端装置从N个中继终端装置接收M个发现指示信息，其中，M个发现指示信息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数；
本实施例中，终端装置接收M个发现指示信息为终端装置接收N个1ST STAGE SCI，且N个1ST STAGE SCI中有M个1ST STAGE SCI包含显示指示域，显示指示域用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，此时发现指示信息为显示指示域。示例性地，在1ST STAGE SCI中用1bit区分1ST STAGE SCI是用于中继终端装置的发现功能还是用于通信功能，即区分终端装置是否可以根据该发现指示信息确定第一备选中继终端装置。例如，显示指示域可以用SL SCI中的1bit进行指示，当1bit的显示指示域值为1时，可以确定SL SCI用于中继终端装置的发现功能，即终端装置可以根据该发现指示信息确定发送该SL SCI的中继终端装置为第一备选中继终端装置。其次，当1bit的显示指示域值为0时，可以确定SL SCI用于通信功能，即终端装置可以根据该指示信息确定发送该SL SCI的中继终端装置不是第一备选中继终端装置。
示例性地，以N为4，且4个中继终端装置分别为中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D作为示例进行说明，中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D均向终端装置发送1ST STAGE SCI，而中继终端装置B以及中继终端装置C所发送的1ST STAGE SCI中包含显示指示域，因此终端装置将中继终端装置B以及中继终端装置C确定为第一备选中继终端装置。
其次，终端装置接收M个发现指示信息为终端装置接收N个1ST STAGE SCI，且N个1ST STAGE SCI中包含解扰字段，解扰字段用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，解扰字段是对1ST STAGE SCI中的字段进行解扰得到的，此时发现指示信息为解扰字段。示例性地，隐式指示域可以用SL SCI中的1比特通过解扰进行指示，当最后1bit解扰后得到解扰字段1时，基于解扰字段可以确定SL SCI用于中继终端装置的发现功能，即终端装置可以根据该发现指示信息确定发送该SL SCI的中继终端装置为第一备选中继终端装置。其次，最后1bit解扰后得到的解扰字段0时，基于解扰字段可以确定SL SCI用于通信功能，即终端装置可以根据该指示信息确定发送该SL SCI的中继终端装置不是第一备选中继终端装置。
示例性地，以N为4，且4个中继终端装置分别为中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D作为示例进行说明，中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D均向终端装置发送1ST STAGE SCI，而中继终端装置B以及中继终端装置D所发送的1ST STAGE SCI中包含解扰字段，因此终端装置将中继终端装置B以及中继终端装置D确定为第一备选中继终端装置。
可以理解的是，前述示例仅用于理解本方案，在不同的通信系统以及不同的应用场景中，接收发现指示信息以及发现指示信息的形态均不相同，本方案不对此进行限定。
S203、终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置，其中，第一滤波结果集合是对第一测量结果集合中的一个第一测量结果 进行滤波得到的。
本实施例中，终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置的具体方式与步骤S103类似，在此不再赘述。
S204、终端装置与第一目标中继终端装置建立通信连接。
本实施例中，终端装置与第一目标中继终端装置建立通信连接的具体方式与步骤S104类似，在此不再赘述。
S205、中继终端装置向目标装置传输终端装置发送的数据。
本实施例中，中继终端装置向目标装置传输终端装置发送的数据的具体方式与步骤S105类似，在此不再赘述。
(2)SL SCI包括2nd stage SCI
请参阅图9，图9为本申请实施例中中继终端装置选择的方法另一实施例的示意图，如图所示，中继终端装置选择的方法包括如下步骤。
S301、终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数。
本实施例中，终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合的方式与步骤S101类似，在此不再赘述。
S302、终端装置从N个中继终端装置接收M个发现指示信息，其中，M个发现指示信息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数；
本实施例中，终端装置接收M个发现指示信息为终端装置接收N个2nd stage SCI，且N个2nd stage SCI中有M个2nd stage SCI包含显示指示域，显示指示域用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，此时发现指示信息为显示指示域。示例性地，在2nd stage SCI中用1bit区分2nd stage SCI是用于中继终端装置的发现功能还是用于通信功能，即区分终端装置是否可以根据该发现指示信息确定第一备选中继终端装置。例如，显示指示域可以用SL SCI中的1bit进行指示，当1bit的显示指示域值为1时，可以确定SL SCI用于中继终端装置的发现功能，即终端装置可以根据该发现指示信息确定发送该SL SCI的中继终端装置为第一备选中继终端装置。其次，当1bit的显示指示域值为0时，可以确定SL SCI用于通信功能，即终端装置可以根据该指示信息确定发送该SL SCI的中继终端装置不是第一备选中继终端装置。
示例性地，以N为4，且4个中继终端装置分别为中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D作为示例进行说明，中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D均向终端装置发送2nd stage SCI，而中继终端装置B以及中继终端装置C所发送的2nd stage SCI中包含显示指示域，因此终端装置将中继终端装置B以及中继终端装置C确定为第一备选中继终端装置。
其次，终端装置接收M个发现指示信息为终端装置接收N个2nd stage SCI，且N个2nd stage SCI中包含解扰字段，解扰字段用于指示N个中继终端装置中的M个中继终端 装置为M个第一备选中继终端装置，解扰字段是对2nd stage SCI中的字段进行解扰得到的，此时发现指示信息为解扰字段。示例性地，用1bit在2nd stage SCI的最后1bit信息进行加扰，对最后1bit信息解扰后得到解扰字段，用该解扰字段区分2nd stage SCI是用于中继终端装置的发现功能还是用于通信功能，即区分终端装置是否可以根据该发现指示信息确定第一备选中继终端装置。例如，隐式指示域可以用SL SCI中的1比特通过解扰进行指示，当最后1bit解扰后得到解扰字段1时，基于解扰字段可以确定SL SCI用于中继终端装置的发现功能，即终端装置可以根据该发现指示信息确定发送该SL SCI的中继终端装置为第一备选中继终端装置。其次，最后1bit解扰后得到的解扰字段0时，基于解扰字段可以确定SL SCI用于通信功能，即终端装置可以根据该指示信息确定发送该SL SCI的中继终端装置不是第一备选中继终端装置。
示例性地，以N为4，且4个中继终端装置分别为中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D作为示例进行说明，中继终端装置A，中继终端装置B，中继终端装置C以及中继终端装置D均向终端装置发送2nd stage SCI，而中继终端装置B以及中继终端装置D所发送的2nd stage SCI中包含解扰字段，因此终端装置将中继终端装置B以及中继终端装置D确定为第一备选中继终端装置。
可以理解的是，前述示例仅用于理解本方案，在不同的通信系统以及不同的应用场景中，接收发现指示信息以及发现指示信息的形态均不相同，本方案不对此进行限定。
S303、终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置，其中，第一滤波结果集合是对第一测量结果集合中的一个第一测量结果进行滤波得到的。
本实施例中，终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置的具体方式与步骤S103类似，在此不再赘述。
S304、终端装置与第一目标中继终端装置建立通信连接。
本实施例中，终端装置与第一目标中继终端装置建立通信连接的具体方式与步骤S104类似，在此不再赘述。
S305、中继终端装置向目标装置传输终端装置发送的数据。
本实施例中，中继终端装置向目标装置传输终端装置发送的数据的具体方式与步骤S105类似，在此不再赘述。
进一步地，基于前述实施例，终端装置可通过不同的方式获取第一滤波结果集合，一种可能的实现方式中，终端装置连续对第一测量结果集合中的第一测量结果进行滤波得到多个滤波结果集合，确定接收到发现指示信息后将多个滤波结果集合中最新的滤波结果集合确定为第一滤波结果集合。另一种可能的实现方式中，终端装置将第一测量结果集合缓存至物理层，当终端装置接收到发现指示信息时，从物理层获取最新的第一测量结果集合，然后再对该第一测量结果集合进行滤波，从而得到第一滤波结果集合。另一种可能的实现方式中，终端装置获取到第一测量结果集合后，连续对第一测量结果集合中的多个第一测量结果进行滤波，从而得到多个第一滤波结果集合，然后将多个滤波结果集合缓存至高层，当终端装置接收到发现指示信息时，直接从高层获取最新的第一滤波结果集合。下面将基于不同获取第一滤波结果集合的方式，对本申请实施例使用的中继终端装置选择的方法进 行详细描述。
一、在物理层连续对第一测量结果集合中的第一测量结果进行滤波
请参阅图10，图10为本申请实施例中中继终端装置选择的方法另一实施例的示意图，如图所示，中继终端装置选择的方法包括如下步骤。
S401、终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数。
本实施例中，终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合的方式与步骤S101类似，在此不再赘述。
S402、终端装置连续对第一测量结果集合中的第一测量结果进行滤波得到多个滤波结果集合。
本实施例中，终端装置通过步骤S401对第一测量量进行物理层测量得到第一测量结果集合，并且连续对第一测量结果集合中的第一测量结果进行滤波。从而得到多个滤波结果集合。
示例性地，以终端装置在第1ms，第3ms，第5ms均对第一测量量进行物理层测量作为一个示例进行说明。由此可以得到第一测量结果集合，且每个第一测量结果对应一个时间点，若第一测量结果集合包括第一测量结果A，第一测量结果B以及第一测量结果C。其中，第一测量结果A为终端装置在第1ms对第一测量量进行物理层测量得到的，第一测量结果B为终端装置在第3ms对第一测量量进行物理层测量得到的，第一测量结果C为终端装置在第5ms对第一测量量进行物理层测量得到的。因此，终端装置对第一测量结果A进行滤波，可以得到与第一测量结果A对应的滤波结果集合A，同理可得，得到与第一测量结果B对应的滤波结果集合B，以及得到与第一测量结果C对应的滤波结果集合C，并且滤波结果集合A，滤波结果集合B以及滤波结果集合C是终端装置连续滤波得到的，每个滤波结果集合都对应一个时间点。其中，连续滤波的时间间隔可以是网络设备配置的，或，预配置的。
具体地，滤波可以是L2 Filtering，也可以是L3 Filtering，L2 Filtering在L2进行，而L3 Filtering在L3进行，L2 Filtering具体操作计算流程与L3 Filtering操作计算流程类似，L3 Filtering在前述实施例已进行介绍，在此不再赘述。
可选地，当终端装置处于SL Mode 2时，终端装置可以获得第一测量结果集合，当终端装置处于SL Mode 2且进行relay UE选择/重选时，终端装置可以利用第一测量结果集合获得第一滤波结果集合。
可以理解的是，前述示例仅用于理解本方案，具体滤波结果集合以及滤波方式均需要根据实际情况灵活确定，本方案不对此进行限定。
S403、终端装置从N个中继终端装置接收M个发现指示信息，其中，M个发现指示信息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数；
本实施例中，终端装置从N个中继终端装置接收M个发现指示信息的方式可以为步骤 S102所介绍的方法，也可以为步骤S202所介绍的方法，还可以为步骤S302所介绍的方法，此处不再赘述。且具体所使用的方法此处不做限定。
S404、终端装置从多个滤波结果集合中确定第一滤波结果集合。
本实施例中，由于终端装置已接收到发现指示信息，此时终端装置可以从步骤S402所得到的多个滤波结果集合中确定第一滤波结果集合。具体地，第一滤波结果集合为多个滤波结果集合中最新的滤波结果集合。
示例性地，再次以终端装置在第1ms，第3ms，第5ms均对第一测量量进行物理层测量作为一个示例进行说明。基于步骤S402的示例可知，第一测量结果A为终端装置在第1ms对第一测量量进行物理层测量得到的，第一测量结果B为终端装置在第3ms对第一测量量进行物理层测量得到的，第一测量结果C为终端装置在第5ms对第一测量量进行物理层测量得到的。且第一测量结果A对应滤波结果集合A，第一测量结果B对应滤波结果集合B，第一测量结果C对应滤波结果集合C。当终端装置在第6ms确定接收到发现指示信息，与第6ms最接近的滤波结果集合为滤波结果集合C，因此滤波结果集合C为最新的滤波结果集合，由此可以将滤波结果集合C确定为第一滤波结果集合。
可以理解的是，前述示例仅用于理解本方案，具体第一滤波结果集合均需要根据多个滤波结果集合以及确定接收到发现指示信息的实际情况灵活确定，本方案不对此进行限定。
S405、终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置。
本实施例中，终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置的具体方式与步骤S103类似，在此不再赘述。
S406、终端装置与第一目标中继终端装置建立通信连接。
本实施例中，终端装置与第一目标中继终端装置建立通信连接的具体方式与步骤S104类似，在此不再赘述。
S407、中继终端装置向目标装置传输终端装置发送的数据。
本实施例中，中继终端装置向目标装置传输终端装置发送的数据的具体方式与步骤S105类似，在此不再赘述。
二、将第一测量结果集合缓存至物理层
请参阅图11，图11为本申请实施例中中继终端装置选择的方法另一实施例的示意图，如图所示，中继终端装置选择的方法包括如下步骤。
S501、终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数。
本实施例中，终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合的方式与步骤S101类似，在此不再赘述。
S502、终端装置将第一测量结果集合缓存至物理层。
本实施例中，终端装置将所得到第一测量结果集合，缓存至物理层。
具体地，终端装置对第一测量结果集合进行缓存对应的缓存时间为网络设备配置的， 或，预配置的，或，为第二预设值。一种可能的实现方式中，缓存对应的缓存时间包括最小值，用于指示第一测量结果集合能够在物理层保存的最短时间，在该情况下，若缓存时间为50ms，即指示第一测量结果集合需要在物理层至少保存50ms。另一种可能的实现方式中，缓存对应的缓存时间包括最大值，用于指示第一测量结果集合能够在物理层保存的最长时间，在该情况下，若缓存时间为500ms，即指示第一测量结果集合需要在物理层最长保存500ms。其次，另一种可能的实现方式中，缓存对应的缓存时间包括最小值以及最大值，通过最大值以及最小值可以指示第一测量结果集合在物理层保存的时间范围，在该情况下，若缓存时间最小值为50ms，而缓存时间最大值为500ms，即指示第一测量结果集合可以在物理层保存50ms至500ms。可以理解的是，前述示例仅用于理解本方案，具体缓存时间需要根据实际情况灵活确定，本方案不对此进行限定。
S503、终端装置从N个中继终端装置接收M个发现指示信息，其中，M个发现指示信息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数；
本实施例中，终端装置从N个中继终端装置接收M个发现指示信息的方式可以为步骤S102所介绍的方法，也可以为步骤S202所介绍的方法，还可以为步骤S302所介绍的方法，此处不再赘述。且具体所使用的方法此处不做限定。
S504、终端装置从物理层获取第一测量结果集合，对第一测量结果集合中的一个第一测量结果进行滤波得到第一滤波结果集合。
本实施例中，由于终端装置已接收到发现指示信息，此时终端装置可以从物理层获取第一测量结果集合，并且对第一测量结果集合进行滤波得到第一滤波结果集合。
具体地，滤波可以是L2 Filtering，也可以是L3 Filtering，L2 Filtering在L2进行，而L3 Filtering在L3进行，L2 Filtering具体操作计算流程与L3 Filtering操作计算流程类似，L3 Filtering在前述实施例已进行介绍，在此不再赘述。
可选地，当终端装置处于SL Mode 2时，终端装置可以获得第一测量结果集合，当终端装置处于SL Mode 2且进行relay UE选择/重选时，终端装置可以利用第一测量结果集合获得第一滤波结果集合。
可以理解的是，前述示例仅用于理解本方案，具体滤波结果集合以及滤波方式均需要根据实际情况灵活确定，本方案不对此进行限定。
S505、终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置。
本实施例中，终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置的具体方式与步骤S103类似，在此不再赘述。
S506、终端装置与第一目标中继终端装置建立通信连接。
本实施例中，终端装置与第一目标中继终端装置建立通信连接的具体方式与步骤S104类似，在此不再赘述。
S507、中继终端装置向目标装置传输终端装置发送的数据。
本实施例中，中继终端装置向目标装置传输终端装置发送的数据的具体方式与步骤S105类似，在此不再赘述。
三、将第一滤波结果集合缓存至高层
请参阅图12，图12为本申请实施例中中继终端装置选择的方法另一实施例的示意图，如图所示，中继终端装置选择的方法包括如下步骤。
S901、终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数。
本实施例中，终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合的方式与步骤S101类似，在此不再赘述。
S902、终端装置对第一测量结果集合中多个第一测量结果进行滤波得到多个第一滤波结果集合，将多个第一滤波结果集合缓存至高层。
本实施例中，终端装置对第一测量结果集合中多个第一测量结果进行滤波得到多个第一滤波结果集合。然后终端装置将所得到多个第一滤波结果集合，缓存至高层。本实施中所介绍的高层可以为L2或者L3，具体此处不做限定。其次，L2为MAC层，而L3为RRC层。
具体地，滤波可以是L2 Filtering，也可以是L3 Filtering，L2 Filtering在L2进行，而L3 Filtering在L3进行，L2 Filtering具体操作计算流程与L3 Filtering操作计算流程类似，L3 Filtering在前述实施例已进行介绍，在此不再赘述。可以理解的是，前述示例仅用于理解本方案，具体滤波结果集合以及滤波方式均需要根据实际情况灵活确定，本方案不对此进行限定。
可选地，当终端装置处于SL Mode 2时，终端装置可以获得第一测量结果集合，当终端装置处于SL Mode 2且进行relay UE选择/重选时，终端装置可以利用第一测量结果集合获得第一滤波结果集合。
具体地，终端装置对第一滤波结果集合进行缓存对应的缓存时间为网络设备配置的，或，预配置的，或，为第二预设值。一种可能的实现方式中，缓存对应的缓存时间包括最小值，用于指示第一滤波结果集合能够在高层保存的最短时间，在该情况下，若缓存时间为50ms，即指示第一滤波结果集合需要在高层至少保存50ms。另一种可能的实现方式中，缓存对应的缓存时间包括最大值，用于指示第一滤波结果集合能够在高层保存的最长时间，在该情况下，若缓存时间为500ms，即指示第一滤波结果集合需要在高层最长保存500ms。其次，另一种可能的实现方式中，缓存对应的缓存时间包括最小值以及最大值，通过最大值以及最小值可以指示第一滤波结果集合在高层保存的时间范围，在该情况下，若缓存时间最小值为50ms，而缓存时间最大值为500ms，即指示第一滤波结果集合可以在高层保存50ms至500ms。可以理解的是，前述示例仅用于理解本方案，具体缓存时间需要根据实际情况灵活确定，本方案不对此进行限定。
S903、终端装置从N个中继终端装置接收M个发现指示信息，其中，M个发现指示信息用于指示N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数；
本实施例中，终端装置从N个中继终端装置接收M个发现指示信息的方式可以为步骤S102所介绍的方法，也可以为步骤S202所介绍的方法，还可以为步骤S302所介绍的方法， 此处不再赘述。且具体所使用的方法此处不做限定。
S904、终端装置从高层获取第一滤波结果集合。
本实施例中，由于终端装置已接收到发现指示信息，此时终端装置可以从高层获取第一滤波结果集合，所获取的第一滤波结果集合为多个第一滤波结果集合最新得到的第一滤波结果集合。
示例性地，以终端装置在第10ms，第20ms，第30ms时对第一滤波结果集合进行缓存，且缓存对应的缓存时间包括最大值，指示第一滤波结果集合能够在高层保存10ms作为一个示例进行说明。若第10ms缓存第一滤波结果集合A，而10ms后(即第20ms)缓存第一滤波结果集合B，再10ms后(即第30ms)缓存第一滤波结果集合C，当若端设备在第35ms的时候确定接收到发现指示信息，此时高层缓存的为第一滤波结果集合C，因此终端装置从获取第一滤波结果集合C，并基于第一滤波结果集合C进行后续选择第一目标中继终端装置的步骤。应理解，前述示例仅用于理解本方案，具体获取的第一滤波结果集合需要根据缓存时间以及具体接收发现指示信息的时刻确定。
S905、终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置。
本实施例中，终端装置根据第一滤波结果集合，从M个第一备选中继终端装置中选择第一目标中继终端装置的具体方式与步骤S103类似，在此不再赘述。
S906、终端装置与第一目标中继终端装置建立通信连接。
本实施例中，终端装置与第一目标中继终端装置建立通信连接的具体方式与步骤S104类似，在此不再赘述。
S907、中继终端装置向目标装置传输终端装置发送的数据。
本实施例中，中继终端装置向目标装置传输终端装置发送的数据的具体方式与步骤S105类似，在此不再赘述。
上述主要以方法的角度对本申请实施例提供的方案进行了介绍。可以理解的是，通信装置为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的模块及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，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。
本申请实施例可以基于上述方法示例对通信装置进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，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。
下面对本申请中的通信装置进行详细描述，请参阅图13，图13为本申请实施例中通信装置的一个实施例示意图，如图所示，该通信装置600包括处理模块601以及收发模块602。
可选地，该通信装置600可对应于上文方法实施例中的终端装置，例如，可以为终端装置，或者配置于终端装置中的部件(如电路、芯片或芯片系统等)。
应理解，该通信装置600可对应于根据本申请实施例的图7中的方法，或，图8中的方法，或，图9中的方法，或，图10中的方法，或，图11中的方法，或，图12中的方法，该通信装置600可以包括用于执行图7中的方法，或，图8中的方法，或，图9中的方法，或，图10中的方法，或，图11中的方法中终端装置执行的方法的单元。并且，该通信装置600中的各单元和上述其他操作和/或功能分别为了实现图7中的方法，或，图8中的方法，或，图9中的方法，或，图10中的方法，或，图11中的方法，或，图12中的方法的相应流程。
其中，当该通信装置600用于执行图7中的方法时，收发模块602可用于执行图7中的方法的步骤S102，步骤S104以及步骤S105，处理模块601可用于执行图7中的方法的步骤S101以及步骤S103。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置600用于执行图8中的方法时，收发模块602可用于执行图8中的方法的步骤S202，步骤S204以及步骤S205，处理模块601可用于执行图8中的方法的步骤S201以及步骤S203。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置600用于执行图9中的方法时，收发模块602可用于执行图9中的方法的步骤S302，步骤S304以及步骤S305，处理模块601可用于执行图9中的方法的步骤S301以及步骤S303。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置600用于执行图10中的方法时，收发模块602可用于执行图10中的方法的步骤S403，步骤S406以及步骤S407，处理模块601可用于执行图10中的方法的步骤S401，步骤S402，步骤S404以及步骤S405。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置600用于执行图11中的方法时，收发模块602可用于执行图11中的方法的步骤S503，步骤S506以及步骤S507，处理模块601可用于执行图11中的方法的步骤S501，步骤S502，步骤S504以及步骤S505。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置600用于执行图12中的方法时，收发模块602可用于执行图12中的方法的步骤S903，步骤S906以及步骤S907，处理模块601可用于执行图12中的方法的步骤S901，步骤S902，步骤S904以及步骤S905。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
还应理解，该通信装置600为终端装置时，该通信装置600中的收发模块602可以通过收发器实现，例如可对应于图15中示出的通信装置800中的收发器820或图16中示出的终端装置3000中的收发器3020，该通信装置600中的处理模块601可通过至少一个处理器实现，例如可对应于图15中示出的通信装置800中的处理器810或图16中示出的终端装置3000中的处理器3010。
还应理解，该通信装置600为配置于终端装置中的芯片或芯片系统时，该通信装置600中的收发模块602可以通过输入/输出接口、电路等实现，该通信装置600中的处理模块601可以通过该芯片或芯片系统上集成的处理器、微处理器或集成电路等实现。
其次，请参阅图14，图14为本申请实施例中通信装置的另一实施例示意图，如图所示，通信装置700包括收发模块701。
可选地，该通信装置700可对应于上文方法实施例中的中继终端装置，例如，可以为中继终端装置，或者配置于中继终端装置中的部件(如电路、芯片或芯片系统等)。
应理解，该通信装置700可对应于根据本申请实施例的图7中的方法，或，图8中的方法，或，图9中的方法，或，图10中的方法，或，图11中的方法，或，图12中的方法，该通信装置700可以包括用于执行图7中的方法，或，图8中的方法，或，图9中的方法，或，图10中的方法，或，图11中的方法中中继终端装置执行的方法的单元。并且，该通信装置700中的各单元和上述其他操作和/或功能分别为了实现图7中的方法，或，图8中的方法，或，图9中的方法，或，图10中的方法，或，图11中的方法，或，图12中的方法的相应流程。
其中，当该通信装置700用于执行图7中的方法时，收发模块701可用于执行图6中的方法的步骤S101，步骤S102，步骤S104以及步骤S105。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置700用于执行图8中的方法时，收发模块701可用于执行图8中的方法的步骤S201，步骤S202，步骤S204以及步骤S205。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置700用于执行图9中的方法时，收发模块701可用于执行图9中的方法的步骤S301，步骤S302，步骤S304以及步骤S305。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置700用于执行图10中的方法时，收发模块701可用于执行图10中的方法的步骤S401，步骤S403，步骤S406以及步骤S407。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置700用于执行图11中的方法时，收发模块701可用于执行图11中的方法的步骤S501，步骤S503，步骤S506以及步骤S507。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
当该通信装置700用于执行图12中的方法时，收发模块701可用于执行图12中的方法的步骤S901，步骤S903，步骤S906以及步骤S907。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
还应理解，该通信装置700为终端装置时，该通信装置700中的收发模块702可以通过收发器实现，例如可对应于图15中示出的通信装置800中的收发器820或图16中示出的终端装置3000中的收发器3020，该通信装置700中的处理模块701可通过至少一个处理器实现，例如可对应于图15中示出的通信装置800中的处理器810或图16中示出的终端装置3000中的处理器3010。
还应理解，该通信装置700为配置于终端装置中的芯片或芯片系统时，该通信装置 700中的收发模块702可以通过输入/输出接口、电路等实现，该通信装置700中的处理模块701可以通过该芯片或芯片系统上集成的处理器、微处理器或集成电路等实现。
图15为本申请实施例中通信装置800的示意性框图。如图15所示，该通信装置800包括处理器810、收发器820和存储器830。其中，处理器810、收发器820和存储器830通过内部连接通路互相通信，该存储器830用于存储指令，该处理器810用于执行该存储器830存储的指令，以控制该收发器820发送信号和/或接收信号。
应理解，该通信装置800可以对应于上述方法实施例中的终端装置或中继终端装置，并且可以用于执行上述方法实施例中中继终端装置或终端装置执行的各个步骤和/或流程。可选地，该存储器830可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。存储器830可以是一个单独的器件，也可以集成在处理器810中。该处理器810可以用于执行存储器830中存储的指令，并且当该处理器810执行存储器中存储的指令时，该处理器810用于执行上述与中继终端装置或终端装置对应的方法实施例的各个步骤和/或流程。
可选地，该通信装置800是前文实施例中的终端装置。
可选地，该通信装置800是前文实施例中的中继终端装置。
其中，收发器820可以包括发射机和接收机。收发器820还可以进一步包括天线，天线的数量可以为一个或多个。该处理器810和存储器830与收发器820可以是集成在不同芯片上的器件。如，处理器810和存储器830可以集成在基带芯片中，收发器820可以集成在射频芯片中。该处理器810和存储器830与收发器820也可以是集成在同一个芯片上的器件。本申请对此不作限定。
可选地，该通信装置800是配置在终端装置中的部件，如电路、芯片、芯片系统等。
可选地，该通信装置800是配置在中继终端装置中的部件，如电路、芯片、芯片系统等。
其中，收发器820也可以是通信接口，如输入/输出接口、电路等。该收发器820与处理器810和存储器820都可以集成在同一个芯片中，如集成在基带芯片中。
图16是本申请实施例提供的终端装置3000的结构示意图。该终端装置3000可应用于如图1所示的系统中，执行上述方法实施例中终端装置的功能。如图所示，该终端装置3000包括处理器3010和收发器3020。可选地，该终端装置3000还包括存储器3030。其中，处理器3010、收发器3020和存储器3030之间可以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3030用于存储计算机程序，该处理器3010用于从该存储器3030中调用并运行该计算机程序，以控制该收发器3020收发信号。可选地，终端装置3000还可以包括天线3040，用于将收发器3020输出的上行数据或上行控制信令通过无线信号发送出去。
上述处理器3010可以和存储器3030可以合成一个通信装置，处理器3010用于执行存储器3030中存储的程序代码来实现上述功能。具体实现时，该存储器3030也可以集成在处理器3010中，或者独立于处理器3010。该处理器3010可以与图13中的处理模块602或图15中的处理器810对应。
上述收发器3020可以与图13中的收发模块601或图15中的收发器820对应。收发器 3020可以包括接收器(或称接收机、接收电路)和发射器(或称发射机、发射电路)。其中，接收器用于接收信号，发射器用于发射信号。
应理解，图16所示的终端装置3000能够实现图7所示方法实施例，或，图8所示方法实施例，或，图9所示方法实施例，或，图10所示方法实施例，或，图11所示方法实施例，或，图12所示方法实施例中涉及终端装置或者中继终端装置的各个过程。终端装置3000中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详细描述。
上述处理器3010可以用于执行前面方法实施例中描述的由终端装置内部实现的动作，而收发器3020可以用于执行前面方法实施例中描述的终端装置向中继终端装置发送或从中继终端装置接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
可选地，上述终端装置3000还可以包括电源3050，用于给终端装置中的各种器件或电路提供电源。
除此之外，为了使得终端装置的功能更加完善，该终端装置3000还可以包括输入单元3060、显示单元3070、音频电路3080、摄像头3090和传感器3100等中的一个或多个，所述音频电路还可以包括扬声器3082、麦克风3084等。
图17是本申请实施例提供的网络装置的结构示意图，例如可以为基站的结构示意图。该基站4000可应用于如图1所示的系统中，执行上述方法实施例中网络装置的功能。如图所示，该基站4000可以包括一个或多个射频单元，如RRU4100和一个或多个基带单元(BBU)(也可称为分布式单元(DU))4200。所述RRU 4100可以称为收发单元。可选地，该RRU 4100还可以称为收发机、收发电路、或者收发器等等，其可以包括至少一个天线4101和射频单元4102。可选地，RRU 4100可以包括接收单元和发送单元，接收单元可以对应于接收器(或称接收机、接收电路)，发送单元可以对应于发射器(或称发射机、发射电路)。所述RRU 4100部分主要用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端装置发送指示信息。所述BBU 4200部分主要用于进行基带处理，对基站进行控制等。所述RRU 4100与BBU 4200可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述BBU 4200为基站的控制中心，也可以称为处理单元，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等。例如所述BBU(处理单元)可以用于控制基站执行上述方法实施例中关于网络装置的操作流程，例如，生成上述指示信息等。
在一个示例中，所述BBU 4200可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如LTE网)，也可以分别支持不同接入制式的无线接入网(如LTE网，5G网或其他网)。所述BBU 4200还包括存储器4201和处理器4202。所述存储器4201用以存储必要的指令和数据。所述处理器4202用于控制基站进行必要的动作，例如用于控制基站执行上述方法实施例中关于网络装置的操作流程。所述存储器4201和处理器4202可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
应理解，图17所示的基站4000能够实现图7所示方法实施例，或，图8所示方法实 施例，或，图9所示方法实施例，或，图10所示方法实施例，或，图11所示方法实施例，或，图12所示方法实施例中涉及网络装置的各个过程，即接收终端终端设备所发送的数据过程。基站4000中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详细描述。
上述BBU 4200可以用于执行前面方法实施例中描述的由网络装置内部实现的动作，而RRU 4100可以用于执行前面方法实施例中描述的网络装置向终端装置以及中继终端装置发送的动作，或从中继终端装置接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
应理解，图17所示出的基站4000仅为网络装置的一种可能的形态，而不应对本申请构成任何限定。本申请所提供的方法可适用于其他形态的网络装置。例如，包括AAU，还可以包括CU和/或DU，或者包括BBU和自适应无线单元(adaptive radio unit，ARU)，或BBU；也可以为客户终端装置(customer premises equipment，CPE)，还可以为其它形态，本申请对于网络装置的具体形态不做限定。
其中，CU和/或DU可以用于执行前面方法实施例中描述的由网络装置内部实现的动作，而AAU可以用于执行前面方法实施例中描述的网络装置向终端装置以及中继终端装置发送的动作，或从中继终端装置接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
本申请还提供了一种通信装置，包括至少一个处理器，所述至少一个处理器用于执行存储器中存储的计算机程序，以使得所述通信装置执行上述任一方法实施例中终端装置或中继终端装置所执行的方法。
应理解，上述通信装置可以是一个或多个芯片。例如，该通信装置可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
本申请实施例还提供了一种通信装置，包括处理器和通信接口。所述通信接口与所述处理器耦合。所述通信接口用于输入和/或输出信息。所述信息包括指令和数据中的至少一项。所述处理器用于执行计算机程序，以使得所述通信装置执行上述任一方法实施例中终端装置或中继终端装置所执行的方法。
本申请实施例还提供了一种通信装置，包括处理器和存储器。所述存储器用于存储计算机程序，所述处理器用于从所述存储器调用并运行所述计算机程序，以使得所述通信装置执行上述任一方法实施例中终端装置或中继终端装置所执行的方法。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器， 闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应注意，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
根据本申请实施例提供的方法，本申请还提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码在计算机上运行时，使得该计算机执行图7至图12所示实施例中的终端装置执行的方法或中继终端装置执行的方法。
根据本申请实施例提供的方法，本申请还提供一种计算机可读存储介质，该计算机可读存储介质存储有程序代码，当该程序代码在计算机上运行时，使得该计算机执行7至图12所示实施例中的终端装置执行的方法或中继终端装置执行的方法。
根据本申请实施例提供的方法，本申请还提供一种系统，其包括前述的一个或多个终端装置，一个或多个中继终端装置以及一个或多个网络设备。
上述各个装置实施例中中继终端装置与终端装置和方法实施例中的中继终端装置或终端装置完全对应，由相应的模块或单元执行相应的步骤，例如通信单元(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元(处理器)执行。具体单元的功能可以参考相应的方法实施例。其中，处理器可以为一个或多个。
上述实施例中，终端装置可以作为接收设备的一例，中继终端装置可以作为发送设备 的一例。但这不应对本申请构成任何限定。例如，发送设备和接收设备也可以均为终端装置等。本申请对于发送设备和接收设备的具体类型不作限定。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
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，在此不再赘述。
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，例如，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或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接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，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
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处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
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。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖 在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (51)

  1. 一种中继终端装置选择的方法，其特征在于，包括：
    终端装置在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数；
    所述终端装置从所述N个中继终端装置接收M个发现指示信息，其中，所述M个发现指示信息用于指示所述N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数；
    所述终端装置根据第一滤波结果集合，从所述M个第一备选中继终端装置中选择第一目标中继终端装置，其中，所述第一滤波结果集合是对所述第一测量结果集合中的一个第一测量结果进行滤波得到的。
  2. 根据权利要求1所述的方法，其特征在于，所述第一测量量为所述PSCCH的物理侧行链路控制信道参考信号接收功率PSCCH-RSRP；
    或；
    所述第一测量量为所述PSSCH的物理侧行链路共享信道参考信号接收功率PSSCH-RSRP；
    或，
    所述第一测量量为所述PSCCH以及所述PSSCH上所有解调参考信号DMRS所占资源粒子RE功率的线性平均值；
    或，
    所述第一测量量为所述PSCCH-RSRP以及PSSCH-RSRP的加权平均值。
  3. 根据权利要求2所述的方法，其特征在于，所述加权平均值的加权平均系数为网络装置配置的，或，预配置的，或，第一预设值。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述终端装置从所述N个中继终端装置接收M个发现指示信息，包括：
    所述终端装置接收N个所述PSSCH，其中，所述N个所述PSSCH中有M个所述PSSCH携带所述发现指示信息。
  5. 根据权利要求1至3中任一项所述的方法，其特征在于，所述终端装置从所述N个中继终端装置接收M个发现指示信息，包括：
    所述终端装置接收N个侧行链路侧行控制信息SL SCI，其中，所述N个SL SCI中有M个所述SL SCI包含显示指示域，所述显示指示域用于指示所述N个中继终端装置中的所述M个中继终端装置为所述M个第一备选中继终端装置；
    或，
    所述终端装置接收所述N个SL SCI，其中，所述N个SL SCI中有M个所述SL SCI包含解扰字段，所述解扰字段用于指示所述N个中继终端装置中的所述M个中继终端装置为所述M个第一备选中继终端装置，所述解扰字段是对所述SL SCI中的字段进行解扰得到的。
  6. 根据权利要求5所述的方法，其特征在于，所述SL SCI包括第一阶段侧行链路侧行控制信息1st stage SCI和/或第二阶段侧行链路侧行控制信息2nd stage SCI。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端装置将所述第一测量结果集合缓存至物理层；
    当所述终端装置从所述N个中继终端装置接收所述M个发现指示信息时，则所述终端装置从所述物理层获取所述第一测量结果集合。
  8. 根据权利要求7所述的方法，其特征在于，所述缓存对应的缓存时间为网络装置配置的，或，预配置的，或，为第二预设值。
  9. 根据权利要求1至6中任一项所述的方法，其特征在于，所述终端装置根据第一滤波结果集合，从所述M个第一备选中继终端装置中选择第一目标中继终端装置，包括：
    所述终端装置将所述第一滤波结果集合中的滤波值最大的第一滤波结果，确定为第一目标滤波结果；
    所述终端装置从所述M个第一备选中继终端装置中，确定第一目标滤波结果对应的第一备选中继终端装置为所述第一目标中继终端装置。
  10. 根据权利要求1至6中任一项所述的方法，其特征在于，所述终端装置根据第一滤波结果集合，从所述M个第一备选中继终端装置中选择第一目标中继终端装置，包括：
    所述终端装置从所述第一滤波结果集合中，获取所述M个第一备选中继终端装置对应的M个第一滤波结果；
    当所述M个第一滤波结果中存在第二目标滤波结果大于第一阈值，则所述终端装置确定所述第二目标滤波结果对应的第一备选中继终端装置为所述第一目标中继终端装置。
  11. 根据权利要求1至10中任一项所述的方法，其特征在于，所述终端装置处于侧行链路第二模式SL Mode 2，且所述终端装置可以根据所述第一测量结果集合进行资源感知。
  12. 根据权利要求1至10中任一项所述的方法，其特征在于，所述终端装置为用于侧行链路SL通信的服务频率在覆盖外的终端装置；
    或，
    所述终端装置为由用于所述SL通信的服务频率，且驻留小区或主小区的所述接收功率测量低于第二阈值的终端装置。
  13. 根据权利要求1至10中任一项所述的方法，其特征在于，所述发现指示信息为通告消息，应答消息，直接通信接受消息，侧行链路媒体介入控制层控制单元SL MAC CE的字段或所述SL MAC CE的指示域中任一项。
  14. 一种数据传输的方法，其特征在于，包括：
    中继终端装置向终端装置发送发现指示信息，其中，所述发现指示信息用于指示所述中继终端装置为第一备选中继终端装置；
    当所述终端装置选择所述中继终端装置为第一目标中继终端装置时，则所述中继终端装置向目标装置传输所述终端装置发送的数据，其中，所述第一目标中继终端装置是根据第一滤波结果集合从M个所述第一备选中继终端装置中选择的，所述第一滤波结果集合是对第一测量结果集合中的一个第一测量结果进行滤波得到的，所述第一测量结果集合是在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个所述中继终端装置的第一测量量进行测量得到的，N、M均为正整数，M小于或等于N。
  15. 根据权利要求14所述的方法，其特征在于，所述第一测量量为所述PSCCH的物理 侧行链路控制信道参考信号接收功率PSCCH-RSRP；
    或；
    所述第一测量量为所述PSSCH的物理侧行链路共享信道参考信号接收功率PSSCH-RSRP；
    或，
    所述第一测量量为所述PSCCH以及所述PSSCH上所有解调参考信号DMRS所占资源粒子RE功率的线性平均值；
    或，
    所述第一测量量为所述PSCCH-RSRP以及PSSCH-RSRP的加权平均值。
  16. 根据权利要求15所述的方法，其特征在于，所述加权平均值的加权平均系数为网络装置配置的，或，预配置的，或，第一预设值。
  17. 根据权利要求14至16中任一项所述的方法，其特征在于，所述中继终端装置向终端装置发送发现指示信息，包括：
    所述中继终端装置向终端装置发送所述PSSCH，其中，所述PSSCH携带所述发现指示信息。
  18. 根据权利要求14至16中任一项所述的方法，其特征在于，所述中继终端装置向终端装置发送发现指示信息，包括：
    所述中继终端装置向终端装置发送发现侧行链路侧行控制信息SL SCI，其中，所述SL SCI包含显示指示域，所述显示指示域用于指示所述中继终端装置为第一备选中继终端装置；
    或，
    所述中继终端装置向终端装置发送所述SL SCI，其中，所述SL SCI包含解扰字段，所述解扰字段用于指示所述中继终端装置为第一备选中继终端装置，所述解扰字段是对所述SL SCI中的字段进行解扰得到的。
  19. 根据权利要求18所述的方法，其特征在于，所述SL SCI包括第一阶段侧行链路侧行控制信息1st stage SCI和/或第二阶段侧行链路侧行控制信息2nd stage SCI。
  20. 根据权利要求14至19中任一项所述的方法，其特征在于，所述第一目标中继终端装置为第一目标滤波结果对应的第一备选中继终端装置，所述第一目标滤波结果是所述第一滤波结果集合中的滤波值最大的第一滤波结果。
  21. 根据权利要求14至19中任一项所述的方法，其特征在于，所述第一目标中继终端装置为第二目标滤波结果对应的第一备选中继终端装置，所述第二目标滤波结果大于第一阈值。
  22. 根据权利要求14至21中任一项所述的方法，其特征在于，所述终端装置为用于侧行链路SL通信的服务频率在覆盖外的终端装置；
    或，
    所述终端装置为由用于所述SL通信的服务频率，且驻留小区或主小区的所述接收功率测量低于第二阈值的终端装置。
  23. 根据权利要求14至21中任一项所述的方法，其特征在于，所述发现指示信息为 通告消息，应答消息，直接通信接受消息，侧行链路媒体介入控制层控制单元SL MAC CE的字段或所述SL MAC CE的指示域中任一项。
  24. 根据权利要求14至21中任一项所述的方法，其特征在于，所述目标装置传输包括接收终端装置和/或网络装置。
  25. 一种通信装置，其特征在于，包括：
    处理模块，用于在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个中继终端装置的第一测量量进行测量，得到第一测量结果集合，其中，N为正整数；
    收发模块，用于从所述N个中继终端装置接收M个发现指示信息，其中，所述M个发现指示信息用于指示所述N个中继终端装置中的M个中继终端装置为M个第一备选中继终端装置，M小于或等于N，M为正整数；
    所述处理模块，还用于根据第一滤波结果集合，从所述M个第一备选中继终端装置中选择第一目标中继终端装置，其中，所述第一滤波结果集合是对所述第一测量结果集合中的一个第一测量结果进行滤波得到的。
  26. 根据权利要求25所述的通信装置，其特征在于，所述第一测量量为所述PSCCH的物理侧行链路控制信道参考信号接收功率PSCCH-RSRP；
    或；
    所述第一测量量为所述PSSCH的物理侧行链路共享信道参考信号接收功率PSSCH-RSRP；
    或，
    所述第一测量量为所述PSCCH以及所述PSSCH上所有解调参考信号DMRS所占资源粒子RE功率的线性平均值；
    或，
    所述第一测量量为所述PSCCH-RSRP以及PSSCH-RSRP的加权平均值。
  27. 根据权利要求26所述的通信装置，其特征在于，所述加权平均值的加权平均系数为网络装置配置的，或，预配置的，或，第一预设值。
  28. 根据权利要求25至27中任一项所述的通信装置，其特征在于，所述收发模块，具体用于接收N个所述PSSCH，其中，所述N个所述PSSCH中有M个所述PSSCH携带所述发现指示信息。
  29. 根据权利要求25至27中任一项所述的通信装置，其特征在于，所述收发模块，具体用于接收N个侧行链路侧行控制信息SL SCI，其中，所述N个SL SCI中有M个所述SL SCI包含显示指示域，所述显示指示域用于指示所述N个中继终端装置中的所述M个中继终端装置为所述M个第一备选中继终端装置；
    或，
    所述收发模块，具体用于接收所述N个SL SCI，其中，所述N个SL SCI中有M个所述SL SCI包含解扰字段，所述解扰字段用于指示所述N个中继终端装置中的所述M个中继终端装置为所述M个第一备选中继终端装置，所述解扰字段是对所述SL SCI中的字段进行解扰得到的。
  30. 根据权利要求29所述的通信装置，其特征在于，所述SL SCI包括第一阶段侧行链路侧行控制信息1st stage SCI和/或第二阶段侧行链路侧行控制信息2nd stage SCI。
  31. 根据权利要求25至30中任一项所述的通信装置，其特征在于，所述处理模块，还用于将所述第一测量结果集合缓存至物理层；
    所述处理模块，还用于当所述收发模块从所述N个中继终端装置接收所述M个发现指示信息时，则从所述物理层获取所述第一测量结果集合。
  32. 根据权利要求31所述的通信装置，其特征在于，所述缓存对应的缓存时间为网络装置配置的，或，预配置的，或，为第二预设值。
  33. 根据权利要求25至30中任一项所述的通信装置，其特征在于，所述处理模块，具体用于：
    将所述第一滤波结果集合中的滤波值最大的第一滤波结果，确定为第一目标滤波结果；
    从所述M个第一备选中继终端装置中，确定第一目标滤波结果对应的第一备选中继终端装置为所述第一目标中继终端装置。
  34. 根据权利要求25至30中任一项所述的通信装置，其特征在于，所述处理模块，具体用于：
    从所述第一滤波结果集合中，获取所述M个第一备选中继终端装置对应的M个第一滤波结果；
    当所述M个第一滤波结果中存在第二目标滤波结果大于第一阈值，则确定所述第二目标滤波结果对应的第一备选中继终端装置为所述第一目标中继终端装置。
  35. 根据权利要求25至34中任一项所述的通信装置，其特征在于，所述通信装置处于侧行链路第二模式SL Mode 2，且所述通信装置可以根据所述第一测量结果集合进行资源感知。
  36. 根据权利要求25至34中任一项所述的通信装置，其特征在于，所述通信装置为用于侧行链路SL通信的服务频率在覆盖外的终端装置；
    或，
    所述通信装置为由用于所述SL通信的服务频率，且驻留小区或主小区的所述接收功率测量低于第二阈值的终端装置。
  37. 根据权利要求25至34中任一项所述的通信装置，其特征在于，所述发现指示信息为通告消息，应答消息，直接通信接受消息，侧行链路媒体介入控制层控制单元SL MAC CE的字段或所述SL MAC CE的指示域中任一项。
  38. 一种通信装置，其特征在于，包括：
    收发模块，用于向终端装置发送发现指示信息，其中，所述发现指示信息用于指示所述通信装置为第一备选中继终端装置；
    所述收发模块，还用于当所述终端装置选择所述通信装置为第一目标中继终端装置时，则向目标装置传输所述终端装置发送的数据，其中，所述第一目标中继终端装置是根据第一滤波结果集合从M个所述第一备选中继终端装置中选择的，所述第一滤波结果集合是对第一测量结果集合中的一个第一测量结果进行滤波得到的，所述第一测量结果集合是在物理侧行链路控制信道PSCCH以及物理侧行链路共享信道PSSCH中至少一个信道上，对N个 所述通信装置的第一测量量进行测量得到的，N、M均为正整数，M小于或等于N。
  39. 根据权利要求38所述通信装置，其特征在于，所述第一测量量为所述PSCCH的物理侧行链路控制信道参考信号接收功率PSCCH-RSRP；
    或；
    所述第一测量量为所述PSSCH的物理侧行链路共享信道参考信号接收功率PSSCH-RSRP；
    或，
    所述第一测量量为所述PSCCH以及所述PSSCH上所有解调参考信号DMRS所占资源粒子RE功率的线性平均值；
    或，
    所述第一测量量为所述PSCCH-RSRP以及PSSCH-RSRP的加权平均值。
  40. 根据权利要求39所述通信装置，其特征在于，所述加权平均值的加权平均系数为网络装置配置的，或，预配置的，或，第一预设值。
  41. 根据权利要求38至40中任一项所述通信装置，其特征在于，所述收发模块，具体用于向终端装置发送所述PSSCH，其中，所述PSSCH携带所述发现指示信息。
  42. 根据权利要求38至40中任一项所述通信装置，其特征在于，所述收发模块，具体用于向终端装置发送发现侧行链路侧行控制信息SL SCI，其中，所述SL SCI包含显示指示域，所述显示指示域用于指示所述通信装置为第一备选中继终端装置；
    或，
    所述收发模块，具体用于向终端装置发送所述SL SCI，其中，所述SL SCI包含解扰字段，所述解扰字段用于指示所述通信装置为第一备选中继终端装置，所述解扰字段是对所述SL SCI中的字段进行解扰得到的。
  43. 根据权利要求42所述通信装置，其特征在于，所述SL SCI包括第一阶段侧行链路侧行控制信息1st stage SCI和/或第二阶段侧行链路侧行控制信息2nd stage SCI。
  44. 根据权利要求38至43中任一项所述通信装置，其特征在于，所述第一目标中继终端装置为第一目标滤波结果对应的第一备选中继终端装置，所述第一目标滤波结果是所述第一滤波结果集合中的滤波值最大的第一滤波结果。
  45. 根据权利要求38至43中任一项所述通信装置，其特征在于，所述第一目标中继终端装置为第二目标滤波结果对应的第一备选中继终端装置，所述第二目标滤波结果大于第一阈值。
  46. 根据权利要求38至45中任一项所述通信装置，其特征在于，所述终端装置为用于侧行链路SL通信的服务频率在覆盖外的终端装置；
    或，
    所述终端装置为由用于所述SL通信的服务频率，且驻留小区或主小区的所述接收功率测量低于第二阈值的终端装置。
  47. 根据权利要求38至45中任一项所述通信装置，其特征在于，所述发现指示信息为通告消息，应答消息，直接通信接受消息，侧行链路媒体介入控制层控制单元SL MAC CE的字段或所述SL MAC CE的指示域中任一项。
  48. 根据权利要求38至45中任一项所述通信装置，其特征在于，所述目标装置传输包括接收终端装置和/或网络装置。
  49. 一种芯片，其特征在于，所述芯片包括至少一个处理器，所述至少一个处理器与至少一个存储器通信连接，所述至少一个存储器中存储有指令；所述指令被所述至少一个处理器执行权利要求1至13任一所述的方法，或，执行权利要求14至24任一所述的方法。
  50. 一种计算机可读存储介质，其中存储有指令，当所述指令在计算机上运行时，使得计算机执行如权利要求1至13任一所述的方法，或，执行权利要求14至24任一所述的方法。
  51. 一种通信系统，包括终端装置和中继终端装置，所述终端装置执行如权利要求1至13任一所述的方法，所述中继终端装置执行如权利要求14至24任一所述的方法。
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