WO2021143464A1 - 一种中继设备的选择方法、设备及计算机存储介质 - Google Patents

一种中继设备的选择方法、设备及计算机存储介质 Download PDF

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Publication number
WO2021143464A1
WO2021143464A1 PCT/CN2020/138012 CN2020138012W WO2021143464A1 WO 2021143464 A1 WO2021143464 A1 WO 2021143464A1 CN 2020138012 W CN2020138012 W CN 2020138012W WO 2021143464 A1 WO2021143464 A1 WO 2021143464A1
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WO
WIPO (PCT)
Prior art keywords
relay device
channel quality
link
information
quality information
Prior art date
Application number
PCT/CN2020/138012
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English (en)
French (fr)
Inventor
张惠英
Original Assignee
大唐移动通信设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to US17/790,507 priority Critical patent/US20230045829A1/en
Priority to EP20914496.3A priority patent/EP4093091A4/en
Publication of WO2021143464A1 publication Critical patent/WO2021143464A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H04W40/125—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality using a measured number of retransmissions as a link metric
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • 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

  • This application relates to the field of wireless communication technology, and in particular to a method for selecting a relay device, a device, and a computer storage medium.
  • Devices and devices that are close to each other allow direct communication between devices.
  • Device-to-Device (D2D) is a device-to-device direct communication mechanism.
  • 3GPP 3rd Generation partnership project
  • UE-to-Network Relay layer 3 based device-to-network relay
  • An optional method is to select relay devices for remote devices at the edge and outside coverage of the base station.
  • the relay technology can reduce system power consumption, improve the reliability of D2D transmission, and reduce base station communication. Burden, improve the coverage of D2D communication, and then enable users to get more stable services.
  • how to select a relay device for a remote device has become an urgent problem to be solved.
  • This application relates to the field of wireless communication technology, and in particular to a method for selecting a relay device, a device, and a computer storage medium. Used to select relay equipment for remote equipment.
  • an embodiment of the present application provides a method for selecting a relay device, and the method includes:
  • the remote device determines the channel quality information of the first direct link and the channel quality information of the second direct link between the remote device and at least one candidate relay device; wherein, the first direct link Is a through link through which the candidate relay device sends information to the remote device, and the second through link is a through link through which the candidate relay device receives information from the remote device;
  • the remote device selects the relay to be used from the at least one candidate relay device according to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device equipment.
  • the remote device determines the channel quality information of the first direct link between the remote device and the at least one candidate relay device according to the following manner:
  • the remote device determines the channel quality information of the first direct link according to the first measured signal sent by the candidate relay device.
  • the remote device determines the channel quality information of the second direct link between the remote device and the at least one candidate relay device according to the following manner:
  • the remote device sends a second signal under test to the candidate relay device, so that the candidate relay device determines the second direct link based on the second signal under test Channel quality information of the road;
  • the remote device receives the channel quality information of the second direct link determined according to the second signal under test returned by the candidate relay device.
  • the remote device selects from the at least one candidate relay device according to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device Relay equipment used, including:
  • the parameters included in the channel quality information of the first through link corresponding to the candidate relay device and the parameters included in the channel quality information of the second through link are set to the threshold corresponding to the parameter Compare values to determine whether the candidate relay device is a candidate relay device;
  • the relay device selected for use from the determined candidate relay devices includes:
  • At least two candidate relay devices are determined, according to the parameters included in the channel quality information of the first direct link and the parameters included in the channel quality information of the second direct link corresponding to the candidate relay devices, Describes the relay device selected for use among the at least two candidate relay devices.
  • the method further includes :
  • the remote device determines the relay device that needs to be re-selected according to the channel quality information of the third through link and the channel quality information of the fourth through link between the remote device and the currently used relay device ;
  • the third direct link is a direct link for the currently used relay device to send information to the remote device
  • the fourth direct link is a direct link for the currently used relay device to send information from the remote device.
  • the remote device determines the channel quality information of the third through link between the remote device and the relay device currently in use in the following manner:
  • the remote device determines the channel quality information of the third direct link according to the third signal under test sent by the relay device currently in use.
  • the remote device determines the channel quality information of the fourth direct link between the remote device and the relay device currently in use in the following manner:
  • the remote device sends a fourth signal under test to the relay device currently in use, so that the relay device currently in use determines the channel quality of the fourth direct link according to the fourth signal under test information;
  • the remote device receives the channel quality information of the fourth direct link determined according to the fourth signal under test returned by the relay device currently in use.
  • the remote device determines that it needs to reselect to use according to the channel quality information of the third through link and the channel quality information of the fourth through link between the remote device and the currently used relay device
  • the relay equipment includes:
  • the remote device compares the parameters included in the channel quality information of the third through link corresponding to the currently used relay device and the parameters included in the channel quality information of the fourth through link with the threshold value corresponding to the parameter, According to the comparison result, it is determined that the relay device to be used needs to be reselected.
  • the method further includes :
  • the remote device After the remote device receives the instruction information sent by the relay device currently in use, it is determined that the relay device to be used needs to be reselected;
  • the indication information is sent after the currently used relay device determines that the remote device needs to reselect the relay device to use.
  • the threshold corresponding to the parameter is pre-configured or configured to the remote device by the network side device.
  • the channel quality information includes some or all of the following parameters:
  • CSI Channel State Information
  • CQI Channel Quality Indicator
  • RI Rank Information
  • SINR Signal to Interference plus Noise Ratio
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Receiving Quality
  • RSSI Received Signal Strength Indication
  • Block Error Rate Bit Error Rate
  • Hybrid Automatic Retransmission Request Hybrid Automatic Repeat Request, HARQ
  • an embodiment of the present application provides a method for selecting a relay device, and the method includes:
  • the candidate relay device sends the first signal under test to the remote device, so that the remote device determines the first direct communication between the remote device and the candidate relay device according to the first signal under test.
  • Channel quality information of the link
  • the candidate relay device determines the channel quality information of the second through link between the candidate relay device and the remote device according to the second measured signal sent by the remote device, and sends the channel quality information to the remote device.
  • the end device sends the channel quality information of the second through link, so that the remote device is based on the channel quality information of the first through link and the channel quality of the second through link corresponding to the candidate relay device Relay equipment used for information selection;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information channel quality information, rank information, signal to interference plus noise ratio, reference signal received power, reference signal received quality, received signal strength indication, block error rate, bit error rate, hybrid automatic repeat request information.
  • an embodiment of the present application provides a method for selecting a relay device, and the method includes:
  • the relay device determines auxiliary information used to assist the remote device in determining whether to reselect the relay device to be used;
  • the relay device sends the auxiliary information to the remote device, so that the remote device determines according to the auxiliary information a relay device that needs to be re-selected for use, and according to the relationship between the remote device and at least one candidate
  • the relay device selected for the channel quality information of the first direct link and the channel quality information of the second direct link between the relay devices;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • the auxiliary information includes channel quality information of the third signal under test and the fourth direct link;
  • the sending of the auxiliary information by the relay device to the remote device includes:
  • the relay device sends a third signal under test to the remote device, and the relay device determines the channel quality information of the fourth through link according to the fourth signal under test sent by the remote device, And send the channel quality information of the fourth through link to the remote device, so that the remote device determines the channel quality information of the third through link according to the third signal under test, and according to all The channel quality information of the third through link and the channel quality information of the fourth through link determine the relay device to be used again;
  • the third through link is a through link through which the relay device sends information to the remote device
  • the fourth through link is a through link through which the relay device receives information from the remote device.
  • the auxiliary information is indication information used to indicate a relay device that needs to be reselected for use
  • the auxiliary information determined by the relay device to assist the remote device in determining whether to reselect the relay device to be used includes:
  • the relay device According to the channel quality information of the third direct link and the channel quality information of the fourth direct link between the relay device and the remote device, the relay device generates a medium used to indicate that it needs to be reselected and used. Instruction information of the relay device; wherein, the third through link is a through link for the relay device to send information to the remote device, and the fourth through link is the relay device from the The direct link through which the remote device receives information; or
  • the relay device generates the indication information according to the quality of the cellular communication link between the relay device and the network test device;
  • the relay device generates, according to the working state of the relay device, indication information for indicating that the relay device needs to be reselected for use.
  • the relay device determines the channel quality information of the third through link according to the following manner:
  • the relay device receives the channel quality information returned by the remote device to determine the third through link for the third signal under test.
  • the relay device determines the channel quality information of the fourth through link according to the following manner:
  • the relay device determines the channel quality information of the fourth through link for the fourth signal under test sent by the remote device.
  • the relay device generates information indicating the need for renewal according to the channel quality information of the third direct link and the channel quality information of the fourth direct link between the relay device and the remote device.
  • Instruction information of the relay device selected to be used including:
  • the relay device compares the parameters included in the channel quality information of the third through link and the parameters included in the channel quality information of the fourth through link with thresholds corresponding to the parameters, and generates the Instructions.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information channel quality information, rank information, signal to interference plus noise ratio, reference signal received power, reference signal received quality, received signal strength indication, block error rate, bit error rate, hybrid automatic repeat request information.
  • an embodiment of the present application provides a remote device, including a processor, a memory, and a transceiver;
  • the processor is used to read the program in the memory and execute:
  • the first direct link is the candidate medium A through link through which the relay device sends information to the remote device
  • the second through link is a through link through which the candidate relay device receives information from the remote device
  • a relay device to be used is selected from the at least one candidate relay device.
  • an embodiment of the present application provides a candidate relay device, including a processor, a memory, and a transceiver;
  • the processor is used to read the program in the memory and execute:
  • the channel quality information of the second direct link between the candidate relay device and the remote device is determined according to the second measured signal sent by the remote device, and the channel quality information is transmitted to the remote device through the transceiver
  • the device sends the channel quality information of the second through link, so that the remote device is based on the channel quality information of the first through link and the channel quality information of the second through link corresponding to the candidate relay device Choose the relay device to use;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • an embodiment of the present application provides a relay device, including a processor, a memory, and a transceiver;
  • the processor is used to read the program in the memory and execute:
  • the auxiliary information is sent to the remote device through the transceiver, so that the remote device determines the relay device that needs to be re-selected according to the auxiliary information, and according to the remote device and at least one candidate
  • the relay device selected for the channel quality information of the first direct link and the channel quality information of the second direct link between the relay devices;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • an embodiment of the present application provides a remote device, including:
  • the first determining module is configured to determine the channel quality information of the first direct link and the channel quality information of the second direct link between the remote device and the at least one candidate relay device; wherein, the first direct link A link is a through link through which the candidate relay device sends information to the remote device, and the second through link is a through link through which the candidate relay device receives information from the remote device;
  • the selection module is configured to select the relay to be used from the at least one candidate relay device according to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device equipment.
  • an embodiment of the present application provides a candidate relay device, including:
  • the sending module is configured to send a first signal under test to a remote device, so that the remote device determines the first straight line between the remote device and the candidate relay device according to the first signal under test.
  • Channel quality information of the communication link
  • the measurement module is configured to determine the channel quality information of the second direct link between the candidate relay device and the remote device according to the second measured signal sent by the remote device, and send it to the remote device
  • the device sends the channel quality information of the second through link, so that the remote device is based on the channel quality information of the first through link and the channel quality information of the second through link corresponding to the candidate relay device Choose the relay device to use;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • an embodiment of the present application provides a relay device, including:
  • the second determining module is used to determine auxiliary information used to assist the remote device in determining whether to reselect the relay device to be used;
  • the reselection module is configured to send the auxiliary information to the remote device so that the remote device determines the relay device that needs to be reselected according to the auxiliary information, and according to the remote device and at least one relay device
  • the channel quality information of the first direct link and the channel quality information of the second direct link between the candidate relay devices select the relay device to be used;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • an embodiment of the present application provides a computer storable medium on which a computer program is stored, and when the program is executed by a processor, the steps of the method described in the first aspect are implemented, or the method described in the second aspect is implemented , Or implement the steps of the method described in the third aspect above.
  • the remote device determines the channel quality information of the first direct link and the channel quality of the second direct link between the remote device and at least one candidate relay device After the information, according to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device, the relay device to be used is selected from the at least one candidate relay device. It can be seen from the above that when selecting a relay device, the remote device selects the relay device according to the channel quality information of the two-way direct link between the remote device and the candidate relay device.
  • the relay device when selecting the relay device , the channel quality information of the first direct link through which the candidate relay device sends information to the remote device and the channel quality information of the second direct link through which the remote device sends messages to the candidate relay device are both used as the selective relay According to the reference information of the device, the relay device is selected according to the channel quality information of the two-way direct link, which improves the reliability of the selected relay device.
  • FIG. 1 is a schematic diagram of a system architecture according to an embodiment of the application
  • FIG. 2 is a schematic diagram of a system for selecting a relay device according to an embodiment of the application
  • FIG. 3 is an interactive flowchart of a method for selecting a relay device according to an embodiment of this application
  • FIG. 4 is a schematic diagram of a system for determining a reselection relay device according to an embodiment of the application
  • FIG. 5 is an interactive flowchart of a method for selecting a relay device according to an embodiment of this application
  • FIG. 6 is an interaction flowchart of another method for selecting a relay device according to an embodiment of this application.
  • FIG. 7 is a schematic diagram of a remote device according to an embodiment of this application.
  • FIG. 8 is a schematic diagram of a candidate relay device according to an embodiment of the application.
  • FIG. 9 is a schematic diagram of a relay device according to an embodiment of the application.
  • FIG. 10 is a schematic diagram of another remote device according to an embodiment of the application.
  • FIG. 11 is a schematic diagram of another candidate relay device according to an embodiment of the application.
  • FIG. 12 is a schematic diagram of another relay device according to an embodiment of the application.
  • FIG. 13 is a flowchart of a method for selecting a relay device according to an embodiment of this application.
  • FIG. 14 is a flowchart of another method for selecting a relay device according to an embodiment of the application.
  • FIG. 15 is a flowchart of another method for selecting a relay device according to an embodiment of the application.
  • the acknowledgment character (Ackonwledge Character, ACK) information indicates that the received character has no error.
  • the receiving station checks the received message, and if no error is found, it sends an acknowledgment ACK to the sending station, indicating that the information has been received correctly and is ready to receive the next message.
  • the control character can be sent by the central node or by the remote node.
  • Negative Acknowledge (NACK) information the receiving station checks the received message, and if an error is found, it sends a negative answer NACK to the sending station, indicating that the message is wrong and requires retransmission.
  • GPS Global Positioning System
  • Global users provide low-cost, high-precision navigation information such as three-dimensional position, speed and precise timing.
  • Block Error Rate (Block Error Rate, BLER) refers to the percentage of error blocks in all sent blocks.
  • the block error rate is a long-term statistical average and an important indicator of network performance and service quality.
  • one device sends data to another device in blocks.
  • the sender uses the data in the block to calculate a cyclic redundancy check (Cyclic Redundancy Check, CRC), and sends it to the receiver along with the block.
  • CRC Cyclic Redundancy Check
  • Symbol Error Rate is an index that measures the accuracy of data transmission within a specified period of time.
  • Bit Error Rate bit errors in transmission/total number of transmitted codes*100%.
  • the bit error rate is also defined as a measure of the frequency of bit errors. Research on bit error rate under specific conditions is of great significance to enhancing the performance of wireless communication systems and improving the quality of data transmission.
  • HARQ is a technology that combines forward error correction coding (FEC) and automatic repeat request (ARQ).
  • FEC forward error correction coding
  • ARQ automatic repeat request
  • FIG. 1 exemplarily shows a schematic diagram of a system architecture applicable to an embodiment of the present application.
  • the terminal 101 and the terminal 102 can be connected to the core network device via the access network entity 103 104 for communication, the terminal can refer to User Equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, User agent or user device.
  • UE User Equipment
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in the future 5G network, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the access network entity may also be referred to as a radio access network ((Radio) Access Network, (R) AN) entity, which is collectively referred to as the access network entity or (R) below.
  • the AN entity is mainly responsible for providing wireless connections for the terminal 101 and the terminal 102, ensuring reliable transmission of uplink and downlink data between the terminal 101 and the terminal 102, and so on.
  • the access network entity 103 can be the next generation Node B (gNB) in the 5G system, and can be the Global System of Mobile Communication (GSM) system or Code Division Multiple Access (CDMA)
  • the base station (Base Transceiver Station, BTS), can also be the base station (NodeB, NB) in the Wideband Code Division Multiple Access (WCDMA) system, or the Long Term Evolution (LTE)
  • the evolved base station (Evolutional Node B, eNB or eNodeB) in the system, etc., optionally, the access network entity in the embodiment of the present application is a satellite base station.
  • the core network device 104 is responsible for connecting the terminal device to different networks according to the call request or data request sent by the terminal device through the access network, as well as charging, mobility management, and so on.
  • the core network equipment may be a 4G core network Evolved Packet Core (EPC) or a 5G core network equipment.
  • EPC Evolved Packet Core
  • the link through which the terminal 101 and the terminal 102 communicate with the core network device 104 via the access network entity 103 is the cellular communication link between the network and the terminal, which can also be called Uulink, and the corresponding interface is called Uu
  • the communication link between the terminal 101 and the terminal 102 is a direct communication link between the device and the device, which may also be called a Sidelink, and the corresponding wireless interface is called a direct communication interface or a Sidelink interface.
  • system architecture is only an example of the system architecture applicable to the embodiment of the present application. Compared with the system architecture shown in FIG. 1, the system architecture applicable to the embodiment of the present application can also add other entities or reduce some entities.
  • Typical direct communication scenarios include the following three:
  • a device can send the same data to all devices in a communication group at a time (also called multicast);
  • a device can send the same data to all nearby devices at one time (also called broadcast).
  • the devices that communicate directly may be all on the network, or all off the network, or some devices may be on the network and some devices may be off the network.
  • the so-called on-line means that the equipment participating in direct communication is located in the coverage of the 3GPP base station communication carrier, and the so-called offline means that the equipment participating in the direct communication is not within the coverage of the 3GPP base station communication carrier.
  • the method for the remote UE to select the relay UE is: the remote UE uses the relay UE whose RSRP value of the signal sent in the PC5 channel is higher than the configured threshold as the candidate relay UE, and then the remote UE Among the candidate relay UEs, the UE selects the candidate relay UE with the highest PSRP value of the signal transmitted in the PC5 channel as the used relay UE.
  • the relay UE is selected only by determining the RSRP value of the signal sent by each candidate relay UE on the PC5 channel, and the candidate relay with the highest PSRP value is selected.
  • the method for determining the relay UE is too limited, resulting in low reliability of the determined relay UE.
  • unicast and multicast are introduced, and feedback is introduced in unicast and multicast, that is, the receiving end can feed back CSI, and/or HARQ feedback information to the sending end.
  • the transmitting end can adjust the transmission parameters according to the CSI, and/or retransmit the parameters according to the HARQ feedback information.
  • This application combines the PC5 channel HARQ feedback, PC5 interface measurement report and other mechanisms in the NR system to invent a method for selecting a relay device.
  • the relay device selection system provided by this embodiment of the application includes: a remote device 21 and at least one candidate relay device 22;
  • the remote device 21 is used to determine the channel quality information of the first direct link and the channel quality information of the second direct link between the remote device 21 and the at least one candidate relay device 22; according to the candidate relay device 22 The corresponding channel quality information of the first direct link and the channel quality information of the second direct link select the relay device to be used from the at least one candidate relay device 22.
  • At least one candidate relay device 22 is used to send a first signal under test to the remote device 21, so that the remote device 21 determines the first signal between the remote device 21 and the candidate relay device 22 according to the first signal under test.
  • Channel quality information of the through link; and the candidate relay device 22 determines the channel quality information of the second through link between the candidate relay device 22 and the remote device 21 according to the second measured signal sent by the remote device 21 , And send the channel quality information of the second through link to the remote device 21, so that the remote device 21 can use the channel quality information of the first through link and the channel of the second through link corresponding to the candidate relay device 22
  • the quality information selects the relay device used.
  • the first direct link is a direct link for the candidate relay device 22 to send information to the remote device 21, and the second direct link is a direct link for the candidate relay device 22 to receive information from the remote device 21.
  • the The remote device does not choose the relay device to use this time, and can also re-determine the candidate relay device.
  • the remote device determines the channel quality information of the first direct link and the channel quality of the second direct link between the remote device and at least one candidate relay device After the information, according to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device, the relay device to be used is selected from the at least one candidate relay device. It can be seen from the above that when selecting a relay device, the remote device selects the relay device according to the channel quality information of the two-way direct link between the remote device and the candidate relay device.
  • the relay device when selecting the relay device , the channel quality information of the first direct link through which the candidate relay device sends information to the remote device and the channel quality information of the second direct link through which the remote device sends messages to the candidate relay device are both used as the selective relay According to the reference information of the device, the relay device is selected according to the channel quality information of the two-way direct link, which improves the reliability of the selected relay device.
  • the channel quality information includes some or all of the following parameters:
  • HARQ information can be ACK (correct response) and NACK (error response).
  • the remote device determines the channel quality information of the two-way direct link between the remote device and at least one candidate relay device, it first needs to determine the candidate relay device.
  • the embodiments of this application provide two ways to determine candidate relay devices.
  • One is that the remote device sends a relay request signal in the form of broadcast. After the relay device receives the relay request signal sent by the remote device, if Determine that it can be used by the remote device, send feedback information indicating that it can be a candidate relay device to the remote device, and the remote device will use the relay device corresponding to the received feedback information as the candidate relay device; the other is Multiple relay devices continuously broadcast the relay signal that can be used as a candidate relay device.
  • the remote device detects the relay signal when it needs to use the relay device, and uses the relay device corresponding to the detected relay signal as the candidate. Following the equipment.
  • the remote device determines at least one candidate relay device, it determines the channel quality information of the two-way direct link between the remote device and the at least one candidate relay device, and determines the channel quality information of the two-way direct link between the remote device and the at least one candidate relay device.
  • the channel quality information of the two-way direct link between the two-way direct link selects the relay device to be used from the determined at least one candidate relay device. It should be noted that, in order to facilitate the description of the relay device selection method provided in the embodiment of the present application,
  • the first direct link is used to indicate the direct link through which the candidate relay device sends information to the remote device, and the second direct link is used to indicate the direct link through which the candidate relay device receives information from the remote device.
  • An optional implementation manner is that the remote device determines the channel quality information of the first direct link between the remote device and the at least one candidate relay device in the following manner:
  • the remote device determines the channel quality information of the first direct link according to the first measured signal sent by the candidate relay device.
  • the candidate relay device sends the first signal under test to the remote device, and after receiving the first signal under test sent by the candidate device, the remote device determines the first direct link according to the first signal under test. Channel quality information.
  • the first measured signal sent by the candidate relay device to the remote device may be one of synchronization, broadcast, reference signal, signaling, and data.
  • the channel quality information of the first direct link determined by the remote device according to the first measured signal includes CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, block error rate, bit error rate, and HARQ information. At least one of (ACK, NACK).
  • the remote device determines the channel quality information of the first direct link according to the first measured signal in different ways:
  • the channel quality information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, and RSSI;
  • the remote device measures the first measured signal to obtain the channel quality information of the first direct link
  • the channel quality information includes at least one of a block error rate and a bit error rate
  • the remote device determines the channel quality information of the first direct link according to the first measured signal
  • the candidate relay device sends the first tested signal to the remote device, and the remote device determines the block error rate and the bit error rate of the first direct link according to the received first tested signal data packet.
  • the remote device counts the number of ACKs and the number of NACKs to obtain the block error rate and bit error rate of the first direct link.
  • the block error rate and the bit error rate need to be collected for a period of data statistics. If the block error rate and the bit error rate are selected as the parameters of the channel quality information, for each candidate relay device, the remote device can Calculate the correctness and error of the received first measured signal data packet sent by the candidate relay device within the preset time period, and obtain the block error rate and error code of the first direct link corresponding to the candidate relay device Rate.
  • the channel quality information includes HARQ information
  • the remote device determines the HARQ feedback corresponding to the first measured signal, and generates HARQ information
  • the HARQ information includes the number of ACKs and the number of NACKs determined by the remote device according to the first measured signal.
  • the number of ACKs and the number of NACKs in the HARQ information reflect the channel quality of the first direct link between the remote device and the candidate relay device.
  • An optional implementation manner is that the remote device determines the channel quality information of the second through link with the at least one candidate relay device according to the following manner:
  • the remote device sends the second tested signal to the candidate relay device
  • the candidate relay device determines the channel quality information of the second direct link according to the second measured signal, and returns the determined channel quality information of the second direct link to the remote device;
  • the remote device receives the channel quality information of the second through link returned by the candidate relay device.
  • the remote device sends the second signal under test to the candidate relay device.
  • the candidate relay device determines the second through link according to the second signal under test. Channel quality information, and then the candidate relay device sends the channel quality information of the second through link to the remote device, and then the remote device determines the channel quality information of the second through link with the candidate relay device.
  • the second signal under test sent by the remote device to the candidate relay device may be at least one of synchronization, broadcast, reference signal, signaling, and data.
  • the channel quality information of the second direct link determined by the candidate relay device in the embodiment of the present application according to the second measured signal includes: CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, block error rate, bit error rate, HARQ At least one of information (ACK, NACK).
  • the candidate relay device determines the channel quality information of the second through link according to the second measured signal in different ways:
  • the channel quality information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, and RSSI;
  • the candidate relay device measures the second measured signal to obtain the channel quality information of the second direct link, and sends the channel quality information of the second direct link to the remote device;
  • the channel quality information includes at least one of a block error rate and a bit error rate
  • the candidate relay device determines the channel quality information of the second through link according to the second measured signal
  • the remote device sends the second tested signal to the candidate relay device, and the candidate relay device determines the block error rate and the bit error rate of the second direct link according to the received second signal under test data packet, And send the block error rate and bit error rate of the second direct link to the remote device.
  • the candidate relay device counts the number of ACKs and the number of NACKs to obtain the block error rate and bit error rate of the second direct link, and sends the block error rate and bit error rate of the second direct link to the remote device .
  • the block error rate and the bit error rate need to be collected for a period of data statistics. If the block error rate and the bit error rate are selected as the parameters of the channel quality information, the candidate relay device can receive data within the preset time. The correctness and error of the received second measured signal data packet sent by the remote device are counted, and the block error rate and the bit error rate of the second direct link corresponding to the candidate relay device are obtained.
  • the block error rate and bit error rate of the second direct link can also be determined through the remote device:
  • the remote device sends the second signal under test to the candidate relay device, the candidate relay device determines HARQ feedback, and performs HARQ feedback to the remote device, and the remote device determines the error block of the second through link based on the HARQ feedback Rate, bit error rate.
  • the remote device counts the number of ACKs and the number of NACKs to obtain the block error rate and the bit error rate of the second direct link.
  • the channel quality information includes HARQ information
  • the candidate relay device determines the HARQ feedback corresponding to the second measured signal, and generates HARQ information
  • the HARQ information of the second through link may also be determined through the remote device
  • the candidate relay device determines the HARQ feedback corresponding to the second measured signal, and sends the HARQ feedback corresponding to the second measured signal to the remote device, and the remote device performs statistics based on the HARQ feedback received within a preset time period Generate HARQ information.
  • the HARQ information includes the number of ACKs and the number of NACKs determined by the candidate relay device according to the second measured signal.
  • the number of ACKs and the number of NACKs in the HARQ information reflect the channel quality of the second direct link between the remote device and the candidate relay device.
  • an optional implementation manner is to send the Sidelink to the remote device through the HARQ feedback of the PC5 channel or the PC5 interface measurement report.
  • CSI report or SL (Sidelink)-RSRP report or HARQ feedback the remote device obtains the channel quality information of the second direct link according to the received Sidelink CSI report or SL-RSRP report or HARQ feedback.
  • the remote device determines the channel quality information of the first direct link and the channel quality information of the second direct link between the remote device and the at least one candidate relay device according to the above-mentioned method
  • the channel quality information of the second direct link is determined from the at least one candidate relay device. Select the relay device to be used.
  • An optional implementation manner is that, for any candidate relay device, the parameters included in the channel quality information of the first through link and the parameters included in the channel quality information of the second through link corresponding to the candidate relay device , Compare with the threshold value corresponding to the parameter to determine whether the candidate relay device is a candidate relay device; select the relay device to be used from the determined candidate relay devices.
  • the parameters included in the channel quality information of the first through link corresponding to the candidate relay device are compared with the corresponding threshold, and the second through link corresponding to the candidate relay device is compared.
  • the parameters included in the channel quality information of the link are compared with corresponding thresholds to determine whether the candidate relay device is a candidate relay device, and then the relay device to be used is selected from the determined candidate relay devices.
  • the parameter included in the channel quality information of the first direct link corresponding to the candidate relay device is compared with the corresponding threshold, and the channel quality information of the second direct link corresponding to the candidate relay device includes
  • the candidate relay device that meets the first preset condition is determined as the candidate relay device, where the first preset condition includes some or all of the following conditions:
  • the channel quality information includes CSI
  • the CSI of the first direct link is not less than the first threshold
  • the CSI of the second direct link is not less than the second threshold
  • the channel quality information includes CQI
  • the CQI of the first direct link is not less than the third threshold
  • the CQI of the second direct link is not less than the fourth threshold
  • the channel quality information includes RI
  • the RI of the first direct link is not less than the fifth threshold
  • the RI of the second direct link is not less than the sixth threshold
  • Condition 4 If the channel quality information includes SINR, the SINR of the first direct link is not less than the seventh threshold, and the SINR of the second direct link is not less than the eighth threshold;
  • the channel quality information includes RSRP
  • the RSRP of the first through link is not less than the ninth threshold
  • the RSRP of the second through link is not less than the tenth threshold
  • the channel quality information includes RSRQ
  • the RSRQ of the first through link is not less than the eleventh threshold
  • the RSRQ of the second through link is not less than the twelfth threshold
  • Condition 7 If the channel quality information includes RSSI, the RSSI of the first through link is not less than the thirteenth threshold, and the RSSI of the second through link is not less than the fourteenth threshold;
  • Condition 8 If the channel quality information includes the block error rate, the block error rate of the first through link is not greater than the fifteenth threshold, and the block error rate of the second through link is not greater than the sixteenth threshold;
  • Condition 9 If the channel quality information includes bit error rate, the bit error rate of the first direct link is not greater than the seventeenth threshold, and the bit error rate of the second direct link is not greater than the eighteenth threshold;
  • the channel quality information includes HARQ information
  • the number of ACKs for the first through link is not less than the nineteenth threshold, and the number of ACKs for the second through link is not less than the twentieth threshold; or ,
  • the number of NACKs of the first direct link is not greater than the twenty-first threshold, and the number of NACKs of the second direct link is not greater than the twenty-second threshold.
  • the above threshold is pre-configured or configured by the network side device to the remote device.
  • the network is configured through dedicated signaling, for on-line terminals, the network is configured through broadcast signaling, and for offline terminals, the above threshold is configured through pre-configuration. It is also possible that for any terminal, the above threshold is configured in a pre-configuration manner.
  • the embodiment of the present application does not limit the specific value of the foregoing threshold value, and may be the empirical value of a person skilled in the art.
  • the threshold value corresponding to the channel quality information of the first direct link and the threshold value corresponding to the channel quality information of the second direct link may be the same or different.
  • the first threshold value and the second threshold value may be the same or different.
  • the candidate relay device is determined to be a candidate relay device.
  • the candidate relay device determines whether the channel quality information includes CSI and block error rate. If the CSI value of the first through link corresponding to the candidate relay device is not less than the first threshold, and the second through link The value of the CSI of the link is not less than the second threshold value, and the value of the block error rate of the first direct link is not greater than the fifteenth threshold value, and the value of the block error rate of the second direct link is not greater than At the sixteenth threshold, the candidate relay device is determined to be a candidate relay device.
  • the relay device to be used is selected from the determined candidate relay devices:
  • An optional implementation manner is that if at least two candidate relay devices are determined, the parameters included in the channel quality information of the first direct link corresponding to the candidate relay devices and the second direct link are used.
  • the channel quality information includes parameters, and the relay device to be used is selected from the at least two candidate relay devices.
  • the candidate relay device is used as the relay device used
  • the candidate relay devices are comprehensively sorted according to the channel quality information of the two-way direct link corresponding to each candidate relay device, and one or more are selected as the result of the sorting Relay device used.
  • the size of the parameters included in the channel quality information of the first through link and the size of the parameters included in the channel quality information of the second through link corresponding to each candidate relay device can be Equipment sorting
  • multiple candidate relay devices can be sorted according to the following manner:
  • the channel quality information includes one of the number of ACKs in the CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, and HARQ information;
  • the value of the parameter included in the channel quality information of the first direct link corresponding to the candidate relay device is compared with that of the candidate relay device.
  • the sum of the numerical values of the parameters included in the channel quality information of the second through link corresponding to the device is used as the sorting index corresponding to the candidate relay device; according to the sorting index corresponding to each candidate relay device, the ordering index can be from largest to Sort in small order.
  • the numerical values of the channel quality information parameters on the link with the higher priority are sorted.
  • the priority of the direct link can be pre-configuration or network configuration.
  • the channel quality information includes at least two of the number of ACKs in the CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, and HARQ information;
  • the sum of the parameter values included in the channel quality information of the first through link corresponding to the candidate relay device is determined, and the device is determined Select the sum of the values of the parameters included in the channel quality information of the second through link corresponding to the relay device, and then sum the determined sums of the two through links to obtain the corresponding ranking of the candidate relay device Index: According to the sort index corresponding to each candidate relay device, it can be sorted in descending order.
  • the sum of the numerical value of the channel quality information parameters on the link with the higher priority is sorted.
  • the priority of the direct link can be pre-configuration or network configuration.
  • different weights may be assigned to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device, according to each direct link
  • the weights corresponding to the channels are summed; or, when the channel quality information includes multiple parameters, different weights can be assigned to each parameter, and the summation is performed according to the weight corresponding to each parameter.
  • candidate relay devices may also be comprehensively ranked according to other methods.
  • multiple candidate relay devices can be sorted according to the following manner:
  • the channel quality information includes one of the block error rate, the bit error rate, and the number of NACKs in the HARQ information
  • the value of the parameter included in the channel quality information of the first direct link corresponding to the candidate relay device is compared with that of the candidate relay device.
  • the sum of the numerical values of the parameters included in the channel quality information of the second through link corresponding to the device is used as the sorting index corresponding to the candidate relay device; according to the sorting index corresponding to each candidate relay device, it can be sorted from small to large. The order of sorting.
  • the numerical values of the channel quality information parameters on the link with the higher priority are sorted.
  • the priority of the direct link can be pre-configuration or network configuration.
  • the channel quality information includes at least two of the block error rate, the bit error rate, and the number of NACKs in the HARQ information;
  • the sum of the parameter values included in the channel quality information of the first through link corresponding to the candidate relay device is determined, and the device is determined Select the sum of the values of the parameters included in the channel quality information of the second through link corresponding to the relay device, and then sum the determined sums of the two through links to obtain the corresponding ranking of the candidate relay device Index: According to the sort index corresponding to each candidate relay device, it can be sorted in ascending order.
  • the sum of the numerical value of the channel quality information parameters on the link with the higher priority is sorted.
  • the priority of the direct link can be pre-configuration or network configuration.
  • different weights may be assigned to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device, according to each direct link
  • the weights corresponding to the channels are summed; or, when the channel quality information includes two parameters, different weights can be assigned to each parameter, and the summation is performed according to the weight corresponding to each parameter.
  • candidate relay devices may also be comprehensively ranked according to other methods.
  • the channel quality information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, and the number of ACKs in HARQ information, and includes at least one of block error rate, bit error rate, and the number of NACKs in HARQ information .
  • the channel quality information of the first direct link corresponding to the candidate relay device is determined including CSI, CQI, RI, SINR, RSRP, The sum of the value of at least one parameter among the number of ACKs in RSRQ, RSSI, and HARQ information and the reciprocal of the value of at least one parameter among the block error rate, bit error rate, and the number of NACKs in HARQ information, and determining the candidate
  • the value of at least one parameter among CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, and the number of ACKs in the HARQ information included in the channel quality information of the second through link corresponding to the device and the block error rate and error code The sum of the reciprocal values of at least one parameter in the number of NACKs in the HARQ information and the number of NACKs in the HARQ information, and then sum the determined sum of the two through links to obtain the ranking index corresponding to the candidate relay device;
  • the channel quality information on the link with high priority includes CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, HARQ information
  • the value of at least one parameter in the number of ACKs is sorted by the sum of the reciprocal of the value of at least one parameter among the block error rate, the bit error rate, and the number of NACKs in the HARQ information.
  • the priority of the direct link can be pre-configured or network-configured.
  • different weights may be assigned to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device, according to each direct link
  • the weights corresponding to the channels are summed; or, when the channel quality information includes multiple parameters, different weights can be assigned to each parameter, and the summation is performed according to the weight corresponding to each parameter.
  • candidate relay devices may also be comprehensively ranked according to other methods.
  • an interaction flowchart of a method for selecting a relay device provided by an embodiment of this application, where the remote device is UE1, and the candidate relay devices are UE2 and UE3 respectively as examples.
  • Step 301 UE1 sends a second signal under test to UE2 and UE3;
  • Step 302 UE2 and UE3 determine the channel quality information of the second direct link with UE1 according to the second measured signal;
  • Step 303 UE2 and UE3 send the first signal under test and the channel quality information of the second through link to UE1;
  • Step 304 UE1 determines the channel quality information of the first direct link with UE2 according to the first measured signal sent by UE2, and determines the channel of the first direct link with UE2 according to the first measured signal sent by UE3 Quality information
  • Step 305 UE1 judges whether UE2 is a candidate relay device according to the channel quality information of the first direct link corresponding to UE2 and the channel quality information of the second direct link, and according to the first direct link corresponding to UE3 To determine whether UE3 is a candidate relay device according to the channel quality information of the second direct link and the channel quality information of the second direct link;
  • Step 306 UE1 selects a relay device to be used from the determined candidate relay devices.
  • the method for selecting a relay device provided by the embodiment of the present application is suitable for the process of initially selecting the relay device for the remote device, and also applicable to the process of the remote device performing the relay reselection after determining that the relay needs to be reselected.
  • a system for determining reselection of a relay device includes: a relay device 41 and a remote device 42; wherein, the relay device 41 is the relay currently used by the remote device 42 equipment.
  • the relay device 41 is configured to determine auxiliary information used to assist the remote device 42 in determining whether to reselect the relay device to be used; and send the auxiliary information to the remote device 42;
  • the remote device 42 is used to determine the relay device to be used again according to the auxiliary information, and according to the channel quality information of the first direct link between the remote device 42 and the at least one candidate relay device and the second direct link
  • the channel quality information selects the relay device used.
  • the direct link interaction between the relay device and the remote device can be the transmission of any direct communication channel, such as the physical sidelink control channel (PSCCH) and the physical sidelink shared channel (Physical Sidelink). Shared Channel, PSSCH), Physical Sidelink Broadcast Channel (PSBCH), or synchronization signal, etc.
  • PSCCH physical sidelink control channel
  • Physical Sidelink shared channel Physical Sidelink shared channel
  • PSSCH Physical Sidelink Broadcast Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • synchronization signal etc.
  • the relay device determines the auxiliary information used to assist the remote device in determining whether to reselect the relay device to be used, and sends the auxiliary information to the remote device. After receiving the auxiliary information, the remote device determines whether it is based on the auxiliary information. Perform relay reselection.
  • the remote device in this embodiment of the present application may determine whether to perform relay reselection in the following manner.
  • Method 1 The remote device determines which relay device needs to be reselected according to the channel quality information of the third through link and the channel quality information of the fourth through link between the remote device and the currently used relay device.
  • the auxiliary information includes channel quality information of the third signal under test and the fourth direct link;
  • the relay device sends the third signal under test to the remote device, and the remote device determines the channel quality information of the third through link according to the third signal under test sent by the relay device;
  • the relay device sends the fourth signal under test to the remote device, and the relay device determines the channel quality information of the fourth through link according to the fourth signal under test sent by the remote device, and determines the channel quality of the fourth through link.
  • the quality information is sent to the remote device;
  • the remote device determines the relay device that needs to be reselected according to the channel quality information of the third direct link and the channel quality information of the fourth direct link between the remote device and the relay device.
  • the third through link is a through link for the relay device to send information to the remote device
  • the fourth through link is a through link for the relay device to receive information from the remote device.
  • the remote device sends the fourth signal under test to the relay device, the relay device determines the channel quality information of the fourth through link according to the fourth signal under test sent by the remote device, and the relay device sends the signal to the remote device.
  • the channel quality information of the fourth through link and the channel quality information of the fourth direct link are used to determine whether the relay device to be used needs to be reselected. If the relay device needs to be reselected, the relay device is performed according to the relay selection method provided in this embodiment of the application. Re-election.
  • the third signal under test and the fourth signal under test can be one of synchronization, broadcast, reference signal, signaling, and data;
  • the channel quality information of the third through link and the channel quality information of the fourth through link include: CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, block error rate, bit error rate, hybrid automatic repeat request HARQ information At least one of (ACK, NACK).
  • the remote device determines the channel quality information of the third through link according to the third measured signal in different ways:
  • the channel quality information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, and RSSI;
  • the remote device measures the third signal under test to obtain channel quality information of the third through link
  • the channel quality information includes at least one of a block error rate and a bit error rate
  • the remote device determines the channel quality information of the third through link according to the third measured signal
  • the relay device sends the third signal under test to the remote device, and the remote device determines the block error rate and the bit error rate of the third through link according to the received third signal under test data packet.
  • the remote device counts the number of ACKs and the number of NACKs to obtain the block error rate and bit error rate of the third through link.
  • the block error rate and bit error rate need to be collected for a period of data statistics. If the block error rate and bit error rate are selected as the parameters of the channel quality information, the remote device can check the received data within the preset time. The correctness and error of the third measured signal data packet sent by the relay device are counted, and the block error rate and the bit error rate of the third through link corresponding to the relay device currently in use are obtained.
  • the channel quality information includes HARQ information
  • the remote device determines the HARQ feedback corresponding to the third signal under test, and generates HARQ information
  • the HARQ information includes the number of ACKs and the number of NACKs determined by the remote device according to the third measured signal.
  • the number of ACKs and the number of NACKs in the HARQ information reflect the channel quality of the third through link between the remote device and the currently used relay device.
  • the relay device determines the channel quality information of the fourth through link according to the fourth signal under test in different ways:
  • the channel quality information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, and RSSI;
  • the relay device measures the fourth signal under test to obtain the channel quality information of the fourth direct link, and sends the channel quality information of the fourth direct link to the remote device;
  • the channel quality information includes at least one of a block error rate and a bit error rate
  • the relay device determines the channel quality information of the fourth through link according to the fourth signal under test
  • the remote device sends the fourth signal under test to the relay device, and the relay device determines the block error rate and the bit error rate of the fourth direct link according to the received fourth signal under test data packet, and compares the The block error rate and bit error rate of the four-through link are sent to the remote device.
  • the relay device counts the number of ACKs and the number of NACKs to obtain the block error rate and the bit error rate of the fourth through link.
  • the block error rate and the bit error rate need to be collected for a period of data statistics. If the block error rate and the bit error rate are selected as the parameters of the channel quality information, the relay device can check the received data within the preset time. The correctness and error of the fourth measured signal data packet sent by the remote device are counted, and the block error rate and the bit error rate of the fourth through link corresponding to the relay device currently in use are obtained.
  • the block error rate and bit error rate of the fourth direct link can also be determined through the remote device:
  • the remote device sends the fourth signal under test to the relay device, the relay device determines HARQ feedback, and performs HARQ feedback to the remote device, and the remote device determines the block error rate of the fourth through link according to the HARQ feedback, Bit error rate.
  • the remote device counts the number of ACKs and the number of NACKs to obtain the block error rate and the bit error rate of the fourth through link.
  • the channel quality information includes HARQ information
  • the relay device determines the HARQ feedback corresponding to the fourth signal under test, and generates HARQ information
  • the HARQ information of the fourth through link may also be determined through the remote device
  • the relay device determines the HARQ feedback corresponding to the fourth signal under test, and sends the HARQ feedback corresponding to the fourth signal under test to the remote device, and the remote device generates statistics based on the HARQ feedback received within a preset time period HARQ information.
  • the HARQ information includes the number of ACKs and the number of NACKs determined by the relay device according to the fourth measured signal.
  • the number of ACKs and the number of NACKs in the HARQ information reflect the channel quality of the fourth direct link between the remote device and the currently used relay device.
  • an optional implementation manner is to send Sidelink CSI to the remote device through a mechanism such as the HARQ feedback of the PC5 channel or the measurement report of the PC5 interface.
  • Report or SL-RSRP report or HARQ feedback the remote device obtains the channel quality information of the fourth through link according to the received Sidelink CSI report or SL-RSRP report or HARQ feedback.
  • the remote device After receiving the auxiliary information, the remote device judges whether to perform relay reselection according to the auxiliary information.
  • the auxiliary information is the channel quality information of the third signal under test and the fourth direct link
  • the remote device determines the third The channel quality information of the through link and the received channel quality information of the fourth through link determine whether the relay device needs to be reselected.
  • An optional implementation manner is that the remote device sets the parameters included in the channel quality information of the third through link corresponding to the relay device and the parameters included in the channel quality information of the fourth through link to thresholds corresponding to the parameters. The values are compared, and the relay device that needs to be re-selected is determined according to the comparison result.
  • the remote device compares the parameters included in the channel quality information of the third through link with corresponding thresholds, and compares the parameters included in the channel quality information of the fourth through link with the corresponding thresholds, According to the comparison result, it is judged whether it is necessary to reselect the relay device to be used.
  • the parameters included in the channel quality information of the third through link corresponding to the relay device are compared with the corresponding threshold, and the parameters included in the channel quality information of the fourth through link corresponding to the relay device are compared with After the corresponding threshold values are compared, if the comparison result meets the second preset condition, the remote device determines that the relay device to be used needs to be reselected.
  • the second preset condition includes one of the following conditions:
  • the channel quality information includes CSI
  • the CSI of the third through link is less than the twenty-third threshold
  • the CSI of the fourth through link is less than the twenty-fourth threshold
  • Condition 2 If the channel quality information includes CQI, the CQI of the third through link is less than the twenty-fifth threshold, and/or the CQI of the fourth through link is less than the twenty-sixth threshold;
  • the channel quality information includes RI
  • the RI of the third through link is less than the 27th threshold
  • the RI of the fourth through link is less than the 28th threshold
  • Condition 4 If the channel quality information includes SINR, the SINR of the third through link is less than the 29th threshold, and/or the SINR of the fourth through link is less than the 30th threshold;
  • the channel quality information includes RSRP
  • the RSRP of the third through link is less than the thirty-first threshold
  • the RSRP of the fourth through link is less than the thirty-second threshold
  • Condition 6 If the channel quality information includes RSRQ, the RSRQ of the third through link is less than the 33rd threshold, and/or the RSRQ of the fourth through link is less than the 34th threshold;
  • Condition 7 If the channel quality information includes RSSI, the RSSI of the third through link is less than the thirty-fifth threshold, and/or the RSSI of the fourth through link is less than the thirty-sixth threshold;
  • Condition 8 If the channel quality information includes the block error rate, the block error rate of the third through link is greater than the 37th threshold, and/or the block error rate of the fourth through link is greater than the 38th threshold ;
  • Condition 9 If the channel quality information includes bit error rate, the bit error rate of the third through link is greater than the 39th threshold, and/or the bit error rate of the fourth through link is greater than the fortieth threshold;
  • the channel quality information includes HARQ information
  • the number of ACKs for the third through link is less than the 41st threshold, and/or the number of ACKs for the fourth through link is less than the 42nd threshold; Or, the number of NACKs of the third through link is greater than the forty-third threshold, and the number of NACKs of the fourth through link is greater than the forty-fourth threshold.
  • the above threshold is pre-configured or configured by the network side device to the remote device.
  • the network is configured through dedicated signaling
  • the network is configured through broadcast signaling
  • the above threshold is configured through pre-configuration. It is also possible that for any terminal, the above threshold is configured in a pre-configuration manner.
  • the embodiment of the present application does not limit the specific value of the foregoing threshold value, and may be the empirical value of a person skilled in the art.
  • the relay device For the channel quality information of the two-way direct link between the currently used relay device and the remote device, when the parameters of the channel quality information in either direction meet the second preset condition, the relay device needs to be reselected. For example, for the relay device currently in use, if the channel quality information only includes RSRQ, the following three situations determine the need to reselect the relay device to be used:
  • Case 3 The RSRQ of the third through link is less than the thirty-third threshold and the RSRQ of the fourth through link is less than the thirty-fourth threshold.
  • the remote device determines not to reselect the relay device.
  • an interaction flow chart of the method for selecting a relay device provided by an embodiment of this application, where the remote device is UE1, the relay device is UE2, and the relay device UE2 is the relay device currently in use. .
  • Step 501 UE2 sends a third signal under test to UE1;
  • Step 502 UE1 determines the channel quality information of the third direct link with UE2 according to the third measured signal sent by UE2;
  • Step 503 UE1 sends a fourth signal under test to UE2;
  • Step 504 UE2 determines channel quality information of the fourth direct link with UE1 according to the fourth signal under test.
  • Step 505 UE2 sends the channel quality information of the fourth direct link to UE1.
  • Step 506 The UE1 determines the relay device to be used again according to the channel quality information of the third direct link and the channel quality information of the fourth direct link.
  • steps 501 to 502, and steps 503 to 505 are not limited. Steps 501 to 502 can be executed first and then steps 503 to 505 are executed, or steps 503 to 505 are executed first and then steps 501 to 501 are executed. 502, or steps 501 to 502, and steps 503 to 505 can be executed simultaneously;
  • UE2 can simultaneously send the third signal under test and the channel quality information of the fourth direct link to UE1.
  • Method 2 After determining that the remote device needs to reselect the relay device to be used, the relay device instructs the remote device to reselect the relay device to be used.
  • the auxiliary information is indication information used to indicate that the relay device needs to be re-selected for use.
  • the relay device can determine which relay device the remote device needs to use again according to the following methods:
  • the relay device generates an indication that the relay device needs to be reselected according to the channel quality information of the third direct link and the channel quality information of the fourth direct link between the relay device and the remote device. information.
  • the third through link is a through link for the relay device to send information to the remote device
  • the fourth through link is a through link for the relay device to receive information from the remote device.
  • the relay device When the channel quality of the third direct link or the fourth direct link for communication between the remote device and the relay device currently in use is poor, the relay device generates indication information to instruct the remote device to reselect to use Relay equipment.
  • Manner 2 The relay device generates indication information for indicating that the relay device needs to be reselected according to the quality of the cellular communication link between the relay device and the network side device.
  • the remote device is a device at the edge of the base station coverage or outside the coverage of the base station, the remote device communicates with the network side device through the relay device. If the quality of the cellular communication link Uulink is poor, the relay device generates indication information to instruct the remote device to re-select the relay device to use.
  • Mode 3 The relay device generates the instruction information for the relay device that needs to be re-selected according to the working status of the relay device.
  • the working state of the relay device can be the power, load, etc. of the relay device. If the working state of the relay device is poor, for example, the power of the relay device is low, or the relay device is communicating with the currently used relay device. In the case where the load of the currently used relay device is large due to the large number of remote devices, the relay device generates indication information to instruct the remote device to re-select the relay device to be used.
  • the remote device After receiving the instruction information sent by the relay device, the remote device determines that the relay device needs to be reselected.
  • the embodiment of the present application mainly introduces the manner in which the relay device generates the indication information according to the channel quality information of the third direct link and the channel quality information of the fourth direct link with the remote device.
  • the relay device determines whether it needs to reselect the relay device to be used according to the channel quality information of the two-way direct link. If the relay device determines that the relay device currently in use needs to be reselected, the instruction information is generated, and the relay device will The generated instruction information is sent to the remote device, and the remote device determines the relay device to be used again after receiving the instruction information.
  • An optional implementation manner is that the relay device determines the channel quality information of the third through link according to the following manner:
  • the relay device sends the third measured signal to the remote device, and the remote device determines the channel quality information of the third through link according to the third measured signal, and returns the channel quality information of the third through link to the relay device ;
  • the relay device receives the channel quality information returned by the remote device to determine the third through link based on the third signal under test.
  • the third signal under test sent by the relay device to the remote device may be at least one of synchronization, broadcast, reference signal, signaling, and data.
  • the channel quality information of the third through link determined by the remote device according to the third measured signal in the embodiment of the application includes: CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, block error rate, bit error rate, HARQ information At least one of (ACK, NACK).
  • the manner in which the remote device determines the channel quality information of the third through link according to the third signal under test, and the manner in which the relay device determines the channel quality information of the fourth through link according to the fourth signal under test may be See description above.
  • an optional implementation manner is to send sidelink CSI to the relay device through the HARQ feedback of the PC5 channel or the PC5 interface measurement report mechanism.
  • Report or SL-RSRP report or HARQ feedback the relay device obtains the channel quality information of the third through link according to the received sidelink CSI report or SL-RSRP report or HARQ feedback.
  • the relay device determines the channel quality information of the third through link and the channel quality information of the fourth through link according to the above method, it determines whether or not according to the channel quality information of the third through link and the channel quality information of the fourth through link. Generate instructions.
  • An optional implementation manner is that the relay device compares the parameters included in the channel quality information of the third through link and the parameters included in the channel quality information of the fourth through link with thresholds corresponding to the parameters And generate the indication information according to the comparison result.
  • the relay device compares the parameters included in the channel quality information of the third through link with the corresponding threshold value, and compares the parameters included in the channel quality information of the fourth through link with the corresponding threshold value, and It is determined whether the relay device to be used needs to be reselected, and if the relay device to be used needs to be reselected, the instruction information is generated.
  • the second preset condition includes one of the following conditions:
  • the channel quality information includes CSI
  • the CSI of the third through link is less than the twenty-third threshold
  • the CSI of the fourth through link is less than the twenty-fourth threshold
  • Condition 2 If the channel quality information includes CQI, the CQI of the third through link is less than the twenty-fifth threshold, and/or the CQI of the fourth through link is less than the twenty-sixth threshold;
  • the channel quality information includes RI
  • the RI of the third through link is less than the 27th threshold
  • the RI of the fourth through link is less than the 28th threshold
  • the SINR of the third through link is less than the twentieth threshold, and/or the SINR of the fourth through link is less than the thirtieth threshold;
  • the channel quality information includes RSRP
  • the RSRP of the third through link is less than the thirty-first threshold
  • the RSRP of the fourth through link is less than the thirty-second threshold
  • Condition 6 If the channel quality information includes RSRQ, the RSRQ of the third through link is less than the 33rd threshold, and/or the RSRQ of the fourth through link is less than the 34th threshold;
  • Condition 7 If the channel quality information includes RSSI, the RSSI of the third through link is less than the thirty-fifth threshold, and/or the RSSI of the fourth through link is less than the thirty-sixth threshold;
  • Condition 8 If the channel quality information includes the block error rate, the block error rate of the third through link is greater than the 37th threshold, and/or the block error rate of the fourth through link is greater than the 38th threshold ;
  • Condition 9 If the channel quality information includes bit error rate, the bit error rate of the third through link is greater than the 39th threshold, and/or the bit error rate of the fourth through link is greater than the fortieth threshold;
  • the channel quality information includes HARQ information
  • the number of ACKs for the third through link is less than the 41st threshold, and/or the number of ACKs for the fourth through link is less than the 42nd threshold; Or, the number of NACKs of the third through link is greater than the forty-third threshold, and the number of NACKs of the fourth through link is greater than the forty-fourth threshold.
  • the above threshold is pre-configured or configured by the network side device to the remote device.
  • the network is configured through dedicated signaling
  • the network is configured through broadcast signaling
  • the above threshold is configured through pre-configuration. It is also possible that for any terminal, the above threshold is configured in a pre-configuration manner.
  • the embodiment of the present application does not limit the specific value of the foregoing threshold value, and may be the empirical value of a person skilled in the art.
  • the relay device For the channel quality information of the two-way direct link between the currently used relay device and the remote device, when the parameters of the channel quality information in either direction meet the second preset condition, the relay device needs to be reselected. For example, if the channel quality information only includes the block error rate, the following three situations determine the need to reselect the relay device to be used:
  • the block error rate of the third through link is greater than the thirty-seventh threshold, and/or the block error rate of the fourth through link is greater than the thirty-eighth threshold;
  • Case 1 The block error rate of the third through link is greater than the 37th threshold, and the block error rate of the fourth through link is not greater than the 38th threshold;
  • Case 2 The block error rate of the third through link is not greater than the thirty-seventh threshold, and the block error rate of the fourth through link is greater than the thirty-eighth threshold;
  • Case 3 The block error rate of the third through link is greater than the thirty-seventh threshold and the block error rate of the fourth through link is greater than the thirty-eighth threshold.
  • the relay device determines not to perform the relay device Choose again.
  • the interaction flow chart of the method for selecting a relay device according to an embodiment of this application where the remote device is UE1, the relay device is UE2, and the relay device UE2 is the relay device currently in use. .
  • Step 601 UE2 sends a third signal under test to UE1;
  • Step 602 UE1 determines the channel quality information of the third direct link with UE2 according to the third measured signal sent by UE2;
  • Step 603 UE1 sends the channel quality information of the third through link to UE2;
  • Step 604 UE1 sends a fourth signal under test to UE2;
  • Step 605 UE2 determines channel quality information of the fourth direct link with UE1 according to the fourth signal under test;
  • Step 606 The UE2 determines the relay device to be used again according to the channel quality information of the third direct link and the channel quality information of the fourth direct link, and generates indication information;
  • Step 607 UE2 sends instruction information to UE1;
  • Step 608 After receiving the instruction information, the UE1 determines that the relay device to be used needs to be reselected.
  • steps 601 to 603 and steps 604 to 605 are not limited. Steps 601 to 603 can be performed first and then steps 604 to 605 are performed, or steps 604 to 605 are performed first and then steps 601 to 601 603, or step 601 to step 603, step 604 to step 605 can be executed simultaneously;
  • UE1 can simultaneously send the channel quality information of the third direct link and the fourth signal under test to UE2.
  • the relay device or the remote device determines whether it is necessary to reselect the relay to be used according to the channel quality information of the two-way direct link If it is determined that the device needs to reselect the relay device, the remote device is triggered to reselect the relay device. According to the channel quality information of the two-way direct link, it is judged whether to reselect the relay device, which improves the reliability of judging whether to reselect the relay device.
  • the embodiment of the present application also provides a remote device. Since the principle of the device to solve the problem is similar to the method for selecting the relay device in the embodiment of the present application, the implementation of the device can refer to the implementation of the method. The repetition will not be repeated.
  • a first terminal for feedback in an embodiment of the present application includes: a processor 700, a memory 701, a transceiver 702, and a bus interface.
  • the processor 700 is responsible for managing the bus architecture and general processing, and the memory 701 can store data used by the processor 700 when performing operations.
  • the transceiver 703 is used to receive and transmit data under the control of the processor 700.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 700 and various circuits of the memory represented by the memory 701 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein.
  • the bus interface provides the interface.
  • the processor 700 is responsible for managing the bus architecture and general processing, and the memory 701 can store data used by the processor 700 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 700 or implemented by the processor 700.
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 700 or instructions in the form of software.
  • the processor 700 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 701, and the processor 700 reads the information in the memory 701, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 700 is configured to read a program in the memory 701 and execute:
  • the first direct link is the A through link for a candidate relay device to send information to a remote device
  • the second through link is a through link for the candidate relay device to receive information from the remote device
  • a relay device to be used is selected from the at least one candidate relay device.
  • processor 700 is specifically configured to:
  • the channel quality information of the first direct link is determined according to the first measured signal sent by the candidate relay device.
  • processor 700 is specifically configured to:
  • any candidate relay device send a second signal under test to the candidate relay device through the transceiver 702, so that the candidate relay device determines the second through signal according to the second signal under test Channel quality information of the link;
  • the channel quality information of the second direct link determined according to the second signal under test returned by the candidate relay device is received through the transceiver 702.
  • processor 700 is specifically configured to:
  • the parameters included in the channel quality information of the first through link corresponding to the candidate relay device and the parameters included in the channel quality information of the second through link are set to the threshold corresponding to the parameter Compare values to determine whether the candidate relay device is a candidate relay device;
  • processor 700 is specifically configured to:
  • At least two candidate relay devices are determined, according to the parameters included in the channel quality information of the first direct link and the parameters included in the channel quality information of the second direct link corresponding to the candidate relay devices, Describes the relay device selected for use among the at least two candidate relay devices.
  • processor 700 is further configured to:
  • the relay device determine the relay device to be used again;
  • the third through link is a through link for the currently used relay device to send information to a remote device
  • the fourth through link is a through link for the currently used relay device to send information from the remote device.
  • processor 700 is specifically configured to:
  • processor 700 is specifically configured to:
  • the channel quality information of the fourth direct link determined according to the fourth signal under test returned by the currently used relay device is received through the transceiver 702.
  • processor 700 is specifically configured to:
  • processor 700 is further configured to:
  • the indication information is sent after the currently used relay device determines that the remote device needs to reselect the relay device to use.
  • the threshold corresponding to the parameter is pre-configured or configured to the remote device by the network side device.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information CSI channel state information CSI, channel quality index CQI, rank information RI, signal to interference plus noise ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, block error rate, bit error rate, mixed Automatic retransmission request HARQ information.
  • a candidate relay device in an embodiment of the present application includes: a processor 800, a memory 801, a transceiver 802, and a bus interface.
  • the processor 800 is responsible for managing the bus architecture and general processing, and the memory 801 can store data used by the processor 800 when performing operations.
  • the transceiver 802 is used to receive and transmit data under the control of the processor 800.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 800 and various circuits of the memory represented by the memory 801 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein.
  • the bus interface provides the interface.
  • the processor 800 is responsible for managing the bus architecture and general processing, and the memory 801 can store data used by the processor 800 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 800 or implemented by the processor 800.
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 800 or instructions in the form of software.
  • the processor 800 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 801, and the processor 800 reads the information in the memory 801, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 800 is configured to read a program in the memory 801 and execute:
  • the first tested signal is sent to the remote device through the transceiver 802, so that the remote device determines the first direct communication between the remote device and the candidate relay device according to the first tested signal Channel quality information of the link;
  • the channel quality information of the second direct link between the candidate relay device and the remote device is determined according to the second measured signal sent by the remote device, and the channel quality information is transmitted to the remote device through the transceiver 802.
  • the end device sends the channel quality information of the second through link, so that the remote device is based on the channel quality information of the first through link and the channel quality of the second through link corresponding to the candidate relay device Relay equipment used for information selection;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information CSI channel state information CSI, channel quality index CQI, rank information RI, signal to interference plus noise ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, block error rate, bit error rate, mixed Automatic retransmission request HARQ information.
  • a relay device in an embodiment of the present application includes: a processor 900, a memory 901, a transceiver 902, and a bus interface.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 can store data used by the processor 900 when performing operations.
  • the transceiver 902 is used to receive and transmit data under the control of the processor 900.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 900 and various circuits of the memory represented by the memory 901 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein.
  • the bus interface provides the interface.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 can store data used by the processor 900 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 900 or implemented by the processor 900.
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 900 or instructions in the form of software.
  • the processor 900 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 901, and the processor 900 reads the information in the memory 901, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 900 is configured to read a program in the memory 901 and execute:
  • the auxiliary information is sent to the remote device through the transceiver 902, so that the remote device determines the relay device that needs to be re-selected according to the auxiliary information, and according to the relationship between the remote device and at least one
  • the channel quality information of the first direct link and the channel quality information of the second direct link between the candidate relay devices select the relay device to be used;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • the auxiliary information includes channel quality information of the third signal under test and the fourth direct link;
  • the processor 900 is specifically configured to:
  • the relay device determines the channel quality information of the fourth through link according to the fourth signal under test sent by the remote device , And send the channel quality information of the fourth through link to the remote device through the transceiver 902, so that the remote device determines the third through link according to the third signal under test Channel quality information, and determine the relay device to be used again according to the channel quality information of the third through link and the channel quality information of the fourth through link;
  • the third through link is a through link through which the relay device sends information to the remote device
  • the fourth through link is a through link through which the relay device receives information from the remote device.
  • the auxiliary information is indication information used to indicate a relay device that needs to be reselected for use
  • the processor 900 is specifically configured to:
  • the third through link is a through link for the relay device to send information to the remote device
  • the fourth through link is for the relay device to receive information from the remote device Through the link
  • the relay device According to the quality of the cellular communication link between the relay device and the network side device, generating indication information for indicating that the relay device needs to be re-selected for use; or
  • the instruction information used to indicate that the relay device needs to be re-selected and used is generated.
  • the processor 900 is specifically configured to:
  • the transceiver 902 receives the channel quality information returned by the remote device to determine the third through link based on the third signal under test.
  • the processor 900 is specifically configured to:
  • the channel quality information of the fourth direct link is determined according to the fourth signal under test sent by the remote device.
  • the processor 900 is specifically configured to:
  • the parameters included in the channel quality information of the third through link and the parameters included in the channel quality information of the fourth through link are compared with thresholds corresponding to the parameters, and the indication information is generated according to the comparison result.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information CSI channel state information CSI, channel quality index CQI, rank information RI, signal to interference plus noise ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, block error rate, bit error rate, mixed Automatic retransmission request HARQ information.
  • a remote device in an embodiment of the present application includes:
  • the first determining module 1001 is configured to determine the channel quality information of the first direct link and the channel quality information of the second direct link between the remote device and at least one candidate relay device; wherein, the first direct link The through link is a through link through which the candidate relay device sends information to the remote device, and the second through link is a through link through which the candidate relay device receives information from the remote device;
  • the selection module 1002 is configured to select the one to be used from the at least one candidate relay device according to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device. Following the equipment.
  • the first determining module 1001 is specifically configured to:
  • the channel quality information of the first direct link is determined according to the first measured signal sent by the candidate relay device.
  • the first determining module 1001 is specifically configured to:
  • any candidate relay device For any candidate relay device, send a second signal under test to the candidate relay device, so that the candidate relay device determines the channel quality information of the second through link according to the second signal under test ;
  • the selection module 1002 is specifically configured to:
  • the parameters included in the channel quality information of the first through link corresponding to the candidate relay device and the parameters included in the channel quality information of the second through link are set to the threshold corresponding to the parameter Compare values to determine whether the candidate relay device is a candidate relay device;
  • the selection module 1002 is specifically configured to:
  • At least two candidate relay devices are determined, according to the parameters included in the channel quality information of the first direct link and the parameters included in the channel quality information of the second direct link corresponding to the candidate relay devices, Describes the relay device selected for use among the at least two candidate relay devices.
  • it also includes:
  • the first triggering module is configured to determine the channel quality information of the third through link and the channel quality information of the fourth through link between the remote device and the currently used relay device to determine which one needs to be reselected.
  • the third direct link is a direct link for the currently used relay device to send information to the remote device
  • the fourth direct link is a direct link for the currently used relay device to send information from the remote device.
  • the first trigger module is specifically configured to:
  • the first trigger module is specifically configured to:
  • the first trigger module is specifically configured to:
  • it also includes:
  • the second trigger module is used to determine the relay device to be used again after receiving the instruction information sent by the relay device currently in use;
  • the indication information is sent after the currently used relay device determines that the remote device needs to reselect the relay device to use.
  • the threshold corresponding to the parameter is pre-configured or configured to the remote device by the network side device.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information CSI channel state information CSI, channel quality index CQI, rank information RI, signal to interference plus noise ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, block error rate, bit error rate, mixed Automatic retransmission request HARQ information.
  • a candidate relay device in an embodiment of the present application includes:
  • a candidate relay device includes:
  • the sending module 1101 is configured to send a first signal under test to a remote device, so that the remote device determines the first signal between the remote device and the candidate relay device according to the first signal under test. Channel quality information of the through link;
  • the measurement module 1102 is configured to determine the channel quality information of the second direct link between the candidate relay device and the remote device according to the second measured signal sent by the remote device, and send it to the remote device.
  • the end device sends the channel quality information of the second through link, so that the remote device is based on the channel quality information of the first through link and the channel quality of the second through link corresponding to the candidate relay device Relay equipment used for information selection;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information CSI channel state information CSI, channel quality index CQI, rank information RI, signal to interference plus noise ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, block error rate, bit error rate, mixed Automatic retransmission request HARQ information.
  • the relay device in the embodiment of the present application includes:
  • the second determining module 1201 is configured to determine auxiliary information used to assist the remote device in determining whether to reselect the relay device to be used;
  • the reselection module 1202 is configured to send the auxiliary information to the remote device, so that the remote device determines according to the auxiliary information the relay device that needs to be reselected, and according to the relationship between the remote device and at least A relay device selected for use by the channel quality information of the first direct link and the channel quality information of the second direct link between the candidate relay devices;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • the auxiliary information includes channel quality information of the third signal under test and the fourth direct link;
  • the second determining module 1201 is specifically configured to:
  • the third signal under test is sent to the remote device, and the relay device determines the channel quality information of the fourth through link according to the fourth signal under test sent by the remote device, and combines the first
  • the channel quality information of the four direct links is sent to the remote device, so that the remote device determines the channel quality information of the third direct link according to the third signal under test, and according to the third direct link
  • the channel quality information of the channel and the channel quality information of the fourth through link determine which relay device needs to be reselected;
  • the third through link is a through link through which the relay device sends information to the remote device
  • the fourth through link is a through link through which the relay device receives information from the remote device.
  • the auxiliary information is indication information used to indicate a relay device that needs to be reselected for use
  • the second determining module 1201 is specifically configured to:
  • the third through link is a through link for the relay device to send information to the remote device
  • the fourth through link is for the relay device to receive information from the remote device Through the link
  • the relay device According to the quality of the cellular communication link between the relay device and the network side device, generating indication information for indicating that the relay device needs to be re-selected for use; or
  • the instruction information used to indicate that the relay device needs to be re-selected and used is generated.
  • the second determining module 1201 is specifically configured to:
  • the second determining module 1201 is specifically configured to:
  • the channel quality information of the fourth direct link is determined according to the fourth signal under test sent by the remote device.
  • the second determining module 1201 is specifically configured to:
  • the parameters included in the channel quality information of the third through link and the parameters included in the channel quality information of the fourth through link are compared with thresholds corresponding to the parameters, and the indication information is generated according to the comparison result.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information CSI channel state information CSI, channel quality index CQI, rank information RI, signal to interference plus noise ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, block error rate, bit error rate, mixed Automatic retransmission request HARQ information.
  • the embodiment of the present application also provides a computer storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of any of the above methods are implemented.
  • the embodiment of the application provides a method for selecting a relay device, because this method corresponds to a remote device in the system for selecting a relay device in the embodiment of the application, and the principle of the method to solve the problem is similar to the system Similar, so the implementation of this method can refer to the implementation of the system, and the repetition will not be repeated.
  • a method for selecting a relay terminal in an embodiment of the present application includes:
  • Step 1301 The remote device determines the channel quality information of the first direct link and the channel quality information of the second direct link between the remote device and at least one candidate relay device;
  • Step 1302 The remote device selects a relay device to be used from at least one candidate relay device according to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device.
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to receive information from the remote device
  • the remote device determines the channel quality information of the first direct link between the remote device and the at least one candidate relay device according to the following manner:
  • the remote device determines the channel quality information of the first direct link according to the first measured signal sent by the candidate relay device.
  • the remote device determines the channel quality information of the second direct link between the remote device and the at least one candidate relay device according to the following manner:
  • the remote device sends a second signal under test to the candidate relay device, so that the candidate relay device determines the second direct link based on the second signal under test Channel quality information of the road;
  • the remote device receives the channel quality information of the second direct link determined according to the second signal under test returned by the candidate relay device.
  • the remote device selects from the at least one candidate relay device according to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device Relay equipment used, including:
  • the parameters included in the channel quality information of the first through link corresponding to the candidate relay device and the parameters included in the channel quality information of the second through link are set to the threshold corresponding to the parameter Compare values to determine whether the candidate relay device is a candidate relay device;
  • the relay device selected for use from the determined candidate relay devices includes:
  • At least two candidate relay devices are determined, according to the parameters included in the channel quality information of the first direct link and the parameters included in the channel quality information of the second direct link corresponding to the candidate relay devices, Describes the relay device selected for use among the at least two candidate relay devices.
  • the method further includes :
  • the remote device determines the relay device that needs to be re-selected according to the channel quality information of the third through link and the channel quality information of the fourth through link between the remote device and the currently used relay device ;
  • the third direct link is a direct link for the currently used relay device to send information to the remote device
  • the fourth direct link is a direct link for the currently used relay device to send information from the remote device.
  • the remote device determines the channel quality information of the third through link between the remote device and the relay device currently in use in the following manner:
  • the remote device determines the channel quality information of the third direct link according to the third signal under test sent by the relay device currently in use.
  • the remote device determines the channel quality information of the fourth direct link between the remote device and the relay device currently in use in the following manner:
  • the remote device sends a fourth signal under test to the relay device currently in use, so that the relay device currently in use determines the channel quality of the fourth direct link according to the fourth signal under test information;
  • the remote device receives the channel quality information of the fourth direct link determined according to the fourth signal under test returned by the relay device currently in use.
  • the remote device determines that it needs to reselect to use according to the channel quality information of the third through link and the channel quality information of the fourth through link between the remote device and the currently used relay device
  • the relay equipment includes:
  • the remote device compares the parameters included in the channel quality information of the third through link corresponding to the currently used relay device and the parameters included in the channel quality information of the fourth through link with the threshold value corresponding to the parameter, According to the comparison result, it is determined that the relay device to be used needs to be reselected.
  • the method further includes :
  • the remote device After the remote device receives the instruction information sent by the relay device currently in use, it is determined that the relay device to be used needs to be reselected;
  • the indication information is sent after the currently used relay device determines that the remote device needs to reselect the relay device to use.
  • the threshold corresponding to the parameter is pre-configured or configured to the remote device by the network side device.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information CSI channel state information CSI, channel quality index CQI, rank information RI, signal to interference plus noise ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, block error rate, bit error rate, mixed Automatic retransmission request HARQ information.
  • an embodiment of the application provides a method for selecting a relay terminal, because the method corresponds to any candidate relay device in the system for selecting a relay terminal in the embodiment of the application, and the method solves the problem
  • the principle of is similar to the system, so the implementation of this method can refer to the implementation of the system, and the repetition will not be repeated.
  • a method for selecting a relay terminal in an embodiment of the present application includes:
  • Step 1401 The candidate relay device sends a first measured signal to the remote device, so that the remote device determines the channel quality of the first direct link between the remote device and the candidate relay device according to the first measured signal information;
  • Step 1402 The candidate relay device determines the channel quality information of the second direct link between the candidate relay device and the remote device according to the second measured signal sent by the remote device, and sends the second direct link to the remote device Channel quality information, so that the remote device selects the relay device to use according to the channel quality information of the first direct link and the channel quality information of the second direct link corresponding to the candidate relay device.
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information CSI channel state information CSI, channel quality index CQI, rank information RI, signal to interference plus noise ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, block error rate, bit error rate, mixed Automatic retransmission request HARQ information.
  • a method for selecting a relay terminal in an embodiment of the present application includes:
  • Step 1501 The relay device determines auxiliary information used to assist the remote device in determining whether to reselect the relay device to be used;
  • Step 1502 The relay device sends auxiliary information to the remote device, so that the remote device determines the relay device to be used again according to the auxiliary information, and according to the first line between the remote device and at least one candidate relay device
  • the relay device selected for the channel quality information of the through link and the channel quality information of the second through link;
  • the first direct link is a direct link for the candidate relay device to send information to the remote device
  • the second direct link is a direct link for the candidate relay device to send information from the remote device. Direct link for receiving information.
  • the auxiliary information includes channel quality information of the third signal under test and the fourth direct link;
  • the sending of the auxiliary information by the relay device to the remote device includes:
  • the relay device sends a third signal under test to the remote device, and the relay device determines the channel quality information of the fourth through link according to the fourth signal under test sent by the remote device, And send the channel quality information of the fourth through link to the remote device, so that the remote device determines the channel quality information of the third through link according to the third signal under test, and according to all The channel quality information of the third through link and the channel quality information of the fourth through link determine the relay device to be used again;
  • the third through link is a through link through which the relay device sends information to the remote device
  • the fourth through link is a through link through which the relay device receives information from the remote device.
  • the auxiliary information is indication information used to indicate a relay device that needs to be reselected for use
  • the auxiliary information determined by the relay device to assist the remote device in determining whether to reselect the relay device to be used includes:
  • the relay device According to the channel quality information of the third direct link and the channel quality information of the fourth direct link between the relay device and the remote device, the relay device generates a medium used to indicate that it needs to be reselected and used. Instruction information of the relay device; wherein, the third through link is a through link for the relay device to send information to the remote device, and the fourth through link is the relay device from the The direct link through which the remote device receives information; or
  • the relay device generates indication information for indicating that the relay device needs to be reselected according to the quality of the cellular communication link between the relay device and the network side device;
  • the relay device generates, according to the working state of the relay device, indication information for indicating that the relay device needs to be reselected for use.
  • the relay device determines the channel quality information of the third through link according to the following manner:
  • the relay device receives the channel quality information returned by the remote device to determine the third through link based on the third signal under test.
  • the relay device determines the channel quality information of the fourth through link according to the following manner:
  • the relay device determines the channel quality information of the fourth through link according to the fourth signal under test sent by the remote device.
  • the relay device generates information indicating the need for renewal according to the channel quality information of the third direct link and the channel quality information of the fourth direct link between the relay device and the remote device.
  • Instruction information of the relay device selected to be used including:
  • the relay device compares the parameters included in the channel quality information of the third through link and the parameters included in the channel quality information of the fourth through link with thresholds corresponding to the parameters, and generates the Instructions.
  • the channel quality information includes some or all of the following parameters:
  • Channel state information CSI channel state information CSI, channel quality index CQI, rank information RI, signal to interference plus noise ratio SINR, reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, block error rate, bit error rate, mixed Automatic retransmission request HARQ information.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

本申请涉及无线通信技术领域，特别涉及一种中继设备的选择方法、设备及计算机存储介质。用以为远端设备选择中继设备。本申请实施例远端设备确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；根据候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息，从至少一个候选中继设备中选择使用的中继设备。本申请在选择中继设备时，根据远端设备与候选中继设备之间的双向直通链路的信道质量信息进行中继设备的选择，提高了选择出的中继设备的可靠性。

Description

一种中继设备的选择方法、设备及计算机存储介质
相关申请的交叉引用
本申请要求在2020年01月15日提交中国专利局、申请号为202010043440.0、申请名称为“一种中继设备的选择方法、设备及计算机存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，特别涉及一种中继设备的选择方法、设备及计算机存储介质。
背景技术
相互靠近的设备和设备之间允许进行设备之间的直接通信，设备到设备(Device-to-Device，D2D)是设备到设备之间的直接通信机制，为了扩展网络服务的覆盖，第三代合作项目(3rd Generation partnership project，3GPP)在Rel-13引入了基于层3的设备到网络中继(UE-to-Network Relay)。
在D2D传输中，基站为其覆盖内的边缘用户设备和覆盖外的用户设备提供服务的可靠性相当差。一种可选的方式为，针对基站覆盖边缘和覆盖外的远端设备，为远端设备选择中继设备，通过中继技术能够降低系统功耗、提高D2D传输的可靠性以及减小基站通信负担、提高D2D通信的覆盖范围，进而使用户得到更稳定的服务。但是，如何为远端设备选择中继设备成为亟待解决的问题。
发明内容
本申请涉及无线通信技术领域，特别涉及一种中继设备的选择方法、设备及计算机存储介质。用以为远端设备选择中继设备。
基于上述问题，第一方面，本申请实施例提供一种中继设备的选择方法， 该方法包括：
远端设备确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路；
所述远端设备根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备。
可选的，所述远端设备根据下列方式确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息：
针对任意一个候选中继设备，所述远端设备根据所述候选中继设备发送的第一被测信号确定所述第一直通链路的信道质量信息。
可选的，所述远端设备根据下列方式确定所述远端设备与至少一个候选中继设备之间的第二直通链路的信道质量信息：
针对任意一个候选中继设备，所述远端设备向所述候选中继设备发送第二被测信号，以使所述候选中继设备根据所述第二被测信号确定所述第二直通链路的信道质量信息；
所述远端设备接收所述候选中继设备返回的根据所述第二被测信号确定的所述第二直通链路的信道质量信息。
可选的，所述远端设备根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备，包括：
针对任意一个候选中继设备，将所述候选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，判断所述候选中继设备是否为备选中继设备；
从确定出的备选中继设备中选择使用的中继设备。
可选的，所述从确定出的备选中继设备中选择使用的中继设备，包括：
若确定出至少两个备选中继设备，则根据备选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，从所述至少两个备选中继设备中选择使用的中继设备。
可选的，在所述远端设备确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息之前，还包括：
所述远端设备根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备；
其中，所述第三直通链路为所述当前使用的中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述当前使用的中继设备从所述远端设备接收信息的直通链路。
可选的，所述远端设备根据下列方式确定所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息：
所述远端设备根据所述当前使用的中继设备发送的第三被测信号确定所述第三直通链路的信道质量信息。
可选的，所述远端设备根据下列方式确定所述远端设备与当前使用的中继设备之间的第四直通链路的信道质量信息：
所述远端设备向所述当前使用的中继设备发送第四被测信号，以使所述当前使用的中继设备根据所述第四被测信号确定所述第四直通链路的信道质量信息；
所述远端设备接收所述当前使用的中继设备返回的根据所述第四被测信号确定的所述第四直通链路的信道质量信息。
可选的，所述远端设备根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备，包括：
所述远端设备将当前使用的中继设备对应的第三直通链路的信道质量信 息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果确定需要重新选择使用的中继设备。
可选的，在所述远端设备确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息之前，还包括：
所述远端设备接收到当前使用的中继设备发送的指示信息后，确定需要重新选择使用的中继设备；
其中，所述指示信息为所述当前使用的中继设备确定远端设备需要重新选择使用的中继设备后发送的。
可选的，所述参数对应的门限值为预先配置或由网络侧设备配置给所述远端设备的。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息(Channel State Information，CSI)、信道质量指标(Channel Quality Indicator，CQI)、秩信息(Rand Indication，RI)、信号与干扰加噪声比(Signal to Interference plus Noise Ratio，SINR)、参考信号接收功率(Reference Signal Receiving Power，RSRP)、参考信号接收质量(Reference Signal Receiving Quality，RSRQ)、接收的信号强度指示(Received Signal Strength Indication，RSSI)、误块率、误码率、混合自动重传请求(Hybrid Automatic Repeat Request，HARQ)信息。
第二方面，本申请实施例提供一种中继设备的选择方法，该方法包括：
候选中继设备向远端设备发送第一被测信号，以使所述远端设备根据所述第一被测信号确定所述远端设备与所述候选中继设备之间的第一直通链路的信道质量信息；以及
所述候选中继设备根据所述远端设备发送的第二被测信号确定所述候选中继设备与所述远端设备之间的第二直通链路的信道质量信息，并向所述远端设备发送所述第二直通链路的信道质量信息，以使所述远端设备根据所述候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质 量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息、信道质量指标、秩信息、信号与干扰加噪声比、参考信号接收功率、参考信号接收质量、接收的信号强度指示、误块率、误码率、混合自动重传请求信息。
第三方面，本申请实施例提供一种中继设备的选择方法，该方法包括：
中继设备确定用于辅助所述远端设备判断是否重新选择使用的中继设备的辅助信息；
所述中继设备向所述远端设备发送所述辅助信息，以使所述远端设备根据所述辅助信息确定需要重新选择使用的中继设备，并根据所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
可选的，所述辅助信息包括第三被测信号和第四直通链路的信道质量信息；
所述中继设备向所述远端设备发送所述辅助信息，包括：
所述中继设备向所述远端设备发送第三被测信号，以及所述中继设备根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息，并将所述第四直通链路的信道质量信息发送给所述远端设备，以使所述远端设备根据所述第三被测信号确定第三直通链路的信道质量信息，并根据所述第三直通链路的信道质量信息和所述第四直通链路的信道质量信息确定需要重新选择使用的中继设备；
其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路。
可选的，所述辅助信息为用于表示需要重新选择使用的中继设备的指示信息；
所述中继设备确定用于辅助所述远端设备判断是否重新选择使用的中继设备的辅助信息，包括：
所述中继设备根据所述中继设备与所述远端设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息；其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路；或
所述中继设备根据所述中继设备与网络测设备之间的蜂窝通信链路质量，生成所述指示信息；或
所述中继设备根据所述中继设备的工作状态，生成用于表示需要重新选择使用的中继设备的指示信息。
可选的，所述中继设备根据下列方式确定所述第三直通链路的信道质量信息：
所述中继设备向所述远端设备发送第三被测信号，以使所述远端设备根据所述第三被测信号确定所述第三直通链路的信道质量信息；
所述中继设备接收所述远端设备返回的对所述第三被测信号确定所述第三直通链路的信道质量信息。
可选的，所述中继设备根据下列方式确定所述第四直通链路的信道质量信息：
所述中继设备对所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息。
可选的，所述中继设备根据所述中继设备与所述远端设备之间的第三直 通链路的信道质量信息和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息，包括：
所述中继设备将所述第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果生成所述指示信息。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息、信道质量指标、秩信息、信号与干扰加噪声比、参考信号接收功率、参考信号接收质量、接收的信号强度指示、误块率、误码率、混合自动重传请求信息。
第四方面，本申请实施例提供一种远端设备，包括处理器、存储器和收发机；
其中，所述处理器，用于读取存储器中的程序并执行：
确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；其中，所述第一直通链路为所述候选中继设备向远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路；
根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备。
第五方面，本申请实施例提供一种候选中继设备，包括处理器、存储器和收发机；
其中，所述处理器，用于读取存储器中的程序并执行：
通过所述收发机向远端设备发送第一被测信号，以使所述远端设备根据所述第一被测信号确定所述远端设备与候选中继设备之间的第一直通链路的信道质量信息；以及
根据所述远端设备发送的第二被测信号确定所述候选中继设备与所述远端设备之间的第二直通链路的信道质量信息，并通过所述收发机向所述远端设备发送所述第二直通链路的信道质量信息，以使所述远端设备根据所述候 选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
第六方面，本申请实施例提供一种中继设备，包括处理器、存储器和收发机；
其中，所述处理器，用于读取存储器中的程序并执行：
确定用于辅助所述远端设备判断是否重新选择使用的中继设备的辅助信息；
通过所述收发机向所述远端设备发送所述辅助信息，以使所述远端设备根据所述辅助信息确定需要重新选择使用的中继设备，并根据所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
第七方面，本申请实施例提供一种远端设备，包括：
第一确定模块，用于确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路；
选择模块，用于根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备。
第八方面，本申请实施例提供一种候选中继设备，包括：
发送模块，用于向远端设备发送第一被测信号，以使所述远端设备根据 所述第一被测信号确定所述远端设备与所述候选中继设备之间的第一直通链路的信道质量信息；以及
测量模块，用于根据所述远端设备发送的第二被测信号确定所述候选中继设备与所述远端设备之间的第二直通链路的信道质量信息，并向所述远端设备发送所述第二直通链路的信道质量信息，以使所述远端设备根据所述候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
第九方面，本申请实施例提供一种中继设备，包括：
第二确定模块，用于确定用于辅助远端设备判断是否重新选择使用的中继设备的辅助信息；
重选模块，用于向所述远端设备发送所述辅助信息，以使所述远端设备根据所述辅助信息确定需要重新选择使用的中继设备，并根据所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
第十方面，本申请实施例提供一种计算机可存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述第一方面所述方法的步骤，或实现上述第二方面所述方法的步骤，或实现上述第三方面所述方法的步骤。
本申请实施例提供的中继设备的选择方法，远端设备在确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息后，根据候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息，从至少一个候选中继设备中选择使用的中 继设备。由上可见，在选择中继设备时，远端设备根据远端设备与候选中继设备之间的双向直通链路的信道质量信息来选择中继设备，本申请实施例在选择中继设备时，将候选中继设备向远端设备发送信息的第一直通链路的信道质量信息，以及远端设备向候选中继设备发送消息的第二直通链路的信道质量信息都作为选择中继设备的参考信息，根据双向直通链路的信道质量信息进行中继设备的选择，提高了选择出的中继设备的可靠性。
附图说明
图1为本申请实施例一种系统架构示意图；
图2为本申请实施例一种中继设备的选择系统示意图；
图3为本申请实施例一种中继设备的选择方法的交互流程图；
图4为本申请实施例一种确定重选中继设备的系统示意图；
图5为本申请实施例一种中继设备的选择方法的交互流程图；
图6为本申请实施例另一种中继设备的选择方法的交互流程图；
图7为本申请实施例一种远端设备示意图；
图8为本申请实施例一种候选中继设备示意图；
图9为本申请实施例一种中继设备示意图；
图10为本申请实施例另一种远端设备示意图；
图11为本申请实施例另一种候选中继设备示意图；
图12为本申请实施例另一种中继设备示意图；
图13为本申请实施例一种中继设备的选择方法流程图；
图14为本申请实施例另一种中继设备的选择方法流程图；
图15为本申请实施例另一种中继设备的选择方法流程图。
具体实施方式
为了使本领域普通人员更好地理解本公开的技术方案，下面将结合附图，对本公开实施例中的技术方案进行清楚、完整地描述。
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。以下示例性实施例中所描述的实施方式并不代表与本申请相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本申请的一些方面相一致的装置和方法的例子。
下面对文中出现的一些术语进行解释：
1、本申请实施例中术语“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
2、确认字符(Ackonwledge Character，ACK)信息，表示接收到的字符无错误。接收站对所收到的报文进行检查，若未发现错误，便向发送站发出确认回答ACK，表明信息已被正确接收，并准备好接收下一份报文。该控制字符可由中心结点发送，也可由远地结点发送。
3、否认字符(Negative Acknowledge，NACK)信息，接收站对所收到的报文进行检查，若发现错误，便向发送站发送否认回答NACK，表示报文有错，并要求重发。
4、全球定位系统(Global Positioning System，GPS)，利用定位卫星，在全球范围内实时进行定位、导航的系统，是一种具有全方位、全天候、全时段、高精度的卫星导航系统，能为全球用户提供低成本、高精度的三维位置、速度和精确定时等导航信息。
5、误块率(Block Error Rate，BLER)是指出错的块在所有发送的块中所占的百分比。误块率是一个长期统计平均量，是反映网络性能服务质量的一个重要指标。
在无线网络中，一个设备是按块(block)向另一个设备发送数据的。发 送端使用块中的数据计算出一个循环冗余校验(Cyclic Redundancy Check，CRC)，并随着该块一起发送到接收端。接收端根据收到的数据计算出一个CRC，并与接收到的CRC进行比较，如果二者相等，接收端就认为成功地收到了正确的数据，并向发送端回复一个ACK。如果二者不相等，接收端就认为收到了错误的数据，并向发送端回复一个NACK，要求发送端重传该块。例如，假设发送了500个block的数据，其中499个block回复ACK，1个block回复NACK，则BLER为1/500＝0.002*100％＝0.2％。
6、误码率(Symbol Error Rate，SER)是衡量数据在规定时间内数据传输精确性的指标，误码率＝传输中的误码/所传输的总码数*100％。另外，也有将误码率定义为用来衡量误码出现的频率。进行特定条件下的误码率研究，对增强无线通信系统性能，改善数据传输质量意义重大。
7、HARQ，是一种将前向纠错编码(FEC)和自动重传请求(ARQ)相结合而形成的技术。接收方在解码失败的情况下，保存接收到的数据，并要求发送方重传数据，接收方将重传的数据和先前接收到的数据进行合并后再解码。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
下面将结合附图对本申请作进一步地详细描述。
图1示例性示出了适用于本申请实施例的一种系统架构示意图，如图1所示，在未来的5G系统架构中，终端101与终端102可以经接入网实体103 与核心网设备104进行通信，终端可以指用户设备(User Equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端等。图1中为方便描述，只示例出2个终端，实际网络中，可能存在多个终端共存，在此不再赘述。
接入网(Access Network，AN)实体103，接入网实体也可以称之为无线接入网((Radio)Access Network，(R)AN)实体，以下统称为接入网实体或(R)AN实体，主要负责为终端101和终端102提供无线连接，保证终端101和终端102的上下行数据的可靠传输等。接入网实体103可为5G系统中的下一代基站(generation Node B，gNB)，可以是全球移动通讯(Global System of Mobile communication，GSM)系统或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统中的基站(NodeB，NB)，还可以是长期演进(Long Term Evolution，LTE)系统中的演进型基站(Evolutional Node B，eNB或eNodeB)等，可选的，本申请实施例中的接入网实体为卫星基站。
核心网设备104，核心网设备负责根据终端设备通过接入网发送的呼叫请求或数据请求将所述终端设备接续到不同的网络上，以及计费、移动性管理等。该核心网设备可以为4G核心网演进分组核心网(Evolved Packet Core，EPC)，或者为5G核心网设备。
其中，终端101与终端102经接入网实体103与核心网设备104进行通信的链路为网络与终端之间的蜂窝通信链路，也可以称之为Uu link，其对应的接口称为Uu接口，而终端101与终端102进行通信的链路为设备和设备之 间的直接通信链路，也可以称之为Sidelink，其对应的无线接口称为直接通信接口也称为Sidelink接口。
需要说明的是，上述系统架构仅是对本申请实施例适用系统架构的举例说明，本申请实施例适用的系统架构相比图1所示的系统架构还可以增加其它实体，或减少部分实体。
相互靠近的设备和设备之间允许进行设备之间的直接通信，典型的直接通信场景包括如下三种：
1、直接通信设备之间一对一通信(也称单播)；
2、一个设备一次可以给一个通信群组里的所有设备发送相同数据(也称组播)；
3、一个设备一次可以给所有附近的设备发送相同数据(也称广播)。
以下对两种不同的系统的直接通信的相关背景信息进行介绍：
(一)LTE系统的直接通信相关背景介绍：
直接通信的设备可以均是在网的，或者均是脱网的，还可以是部分设备在网，部分设备脱网。所谓在网即参与直接通信的设备位于3GPP基站通信载波覆盖范围内，所谓脱网即参与直接通信的设备不在3GPP基站通信载波覆盖范围内。
需要说明的是，LTE系统支持的直接通信场景只有广播。
在LTE系统的直接通信中，远端UE选择中继UE的方法是：远端UE将在PC5信道中发送信号的RSRP值高于配置的门限的中继UE作为候选中继UE，然后远端UE在候选中继UE中选择在PC5信道中发送信号的PSRP值最高的候选中继UE作为使用的中继UE。
由上可以看出，现有的远端UE选择中继UE的方法中仅通过确定各个候选中继UE在PC5信道发送的信号的RSRP值来选择中继UE，将PSRP值最高的候选中继UE作为使用的中继UE，确定中继UE的方法过于局限，导致确定出的中继UE可靠性低。
(二)新空口(New Radio，NR)系统的直接通信相关背景介绍：
NR系统的直接通信中引入了单播和组播，在单播和组播中引入反馈，即接收端可以反馈CSI，和/或，HARQ反馈信息给发送端。从而使得发送端可以根据CSI调整发送参数，和/或，根据HARQ反馈信息对参数进行重传。
本申请结合NR系统中PC5信道HARQ反馈、PC5接口测量报告等机制，发明一种中继设备的选择方法。
如图2所示，为本申请实施例提供的中继设备的选择系统，包括：远端设备21、至少一个候选中继设备22；
远端设备21，用于确定远端设备21与至少一个候选中继设备22之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；根据候选中继设备22对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息，从至少一个候选中继设备22中选择使用的中继设备。
至少一个候选中继设备22，用于向远端设备21发送第一被测信号，以使远端设备21根据第一被测信号确定远端设备21与候选中继设备22之间的第一直通链路的信道质量信息；以及候选中继设备22根据远端设备21发送的第二被测信号确定候选中继设备22与远端设备21之间的第二直通链路的信道质量信息，并向远端设备21发送第二直通链路的信道质量信息，以使远端设备21根据候选中继设备22对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备。
其中，第一直通链路为候选中继设备22向远端设备21发送信息的直通链路，第二直通链路为候选中继设备22从远端设备21接收信息的直通链路。
需要说明的是，在根据远端设备与该候选中继设备之间的第一直通链路的信道质量和第二直通链路的信道质量信息，确定候选中继设备无法满足要求时，该远端设备本次不选择使用的中继设备，还可以重新确定候选中继设备。
本申请实施例提供的中继设备的选择方法，远端设备在确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息后，根据候选中继设备对应的第一直通链路的信道质量信息 和第二直通链路的信道质量信息，从至少一个候选中继设备中选择使用的中继设备。由上可见，在选择中继设备时，远端设备根据远端设备与候选中继设备之间的双向直通链路的信道质量信息来选择中继设备，本申请实施例在选择中继设备时，将候选中继设备向远端设备发送信息的第一直通链路的信道质量信息，以及远端设备向候选中继设备发送消息的第二直通链路的信道质量信息都作为选择中继设备的参考信息，根据双向直通链路的信道质量信息进行中继设备的选择，提高了选择出的中继设备的可靠性。
其中，信道质量信息包括下列参数中的部分或全部：
CSI；
CQI；
RI；
SINR；
RSRP；
RSRQ；
RSSI；
误块率；
误码率；
HARQ信息；
其中，HARQ信息可以为ACK(正确应答)、NACK(错误应答)。
远端设备在确定远端设备与至少一个候选中继设备之间的双向直通链路的信道质量信息时，首先需要确定候选中继设备。
本申请实施例中提供两种确定候选中继设备的方式，一种是远端设备以广播的形式发送中继请求信号，中继设备在接收到远端设备发送的中继请求信号后，若确定自身可以被远端设备所使用，向远端设备发送表示可以作为候选中继设备的反馈信息，远端设备将接收到的反馈信息对应的中继设备作为候选中继设备；另一种是多个中继设备持续广播表示可以作为候选中继设备的中继信号，远端设备在需要使用中继设备时进行中继信号检测，将检测 到的中继信号对应的中继设备作为候选中继设备。
需要说明的是，上述两种确定候选中继设备的方式仅是示例的，并不构成对本申请实施例保护范围的限定。
在远端设备确定出至少一个候选中继设备后，确定远端设备与至少一个候选中继设备的之间的双向直通链路的信道质量信息，并根据远端设备与至少一个候选中继设备的之间的双向直通链路的信道质量信息从确定出的至少一个候选中继设备中选择使用的中继设备，需要说明的是，为方便说明本申请实施例提供的中继设备选择方法，用第一直通链路表示候选中继设备向远端设备发送信息的直通链路，用第二直通链路表示候选中继设备从远端设备接收信息的直通链路。
一种可选的实施方式为，远端设备根据下列方式确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息：
针对任意一个候选中继设备，远端设备根据候选中继设备发送的第一被测信号确定第一直通链路的信道质量信息。
具体的，候选中继设备向远端设备发送第一被测信号，远端设备在接收到候选设备发送的第一被测信号后，根据第一被测信号，确定第一直通链路的信道质量信息。
其中，候选中继设备向远端设备发送的第一被测信号可以是同步、广播、参考信号、信令、数据中的一种。
本申请实施例远端设备根据第一被测信号确定的第一直通链路的信道质量信息包括CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、误块率、误码率、HARQ信息(ACK、NACK)中的至少一个。
其中，针对不同类型的信道质量信息，远端设备根据第一被测信号确定第一直通链路的信道质量信息的方式不同：
1、信道质量信息包括CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI中的至少一个；
远端设备对第一被测信号进行测量得到第一直通链路的信道质量信息；
2、信道质量信息包括误块率、误码率中的至少一个；
远端设备根据第一被测信号确定第一直通链路的信道质量信息；
具体的，候选中继设备向远端设备发送第一被测信号，远端设备根据接收到的上述第一被测信号数据包，确定第一直通链路的误块率、误码率。
或远端设备对ACK的数目与NACK的数目进行统计得到第一直通链路的误块率、误码率。
需要说明的是，误块率与误码率需要进行一段时间的数据统计才能得到，若选择误块率、误码率作为信道质量信息的参数，针对每个候选中继设备，远端设备可以对预设时长内的接收到的候选中继设备发送的第一被测信号数据包的正确和错误进行统计，得到该候选中继设备对应的第一直通链路的误块率、误码率。
3、信道质量信息包括HARQ信息；
远端设备确定第一被测信号对应的HARQ反馈，并生成HARQ信息；
其中，HARQ信息中包含远端设备根据第一被测信号确定的ACK的数目以及NACK的数目。通过HARQ信息中的ACK的数目以及NACK的数目反映远端设备与该候选中继设备之间的第一直通链路的信道质量。
一种可选的实施方式为，远端设备根据下列方式确定与至少一个候选中继设备的第二直通链路的信道质量信息：
针对任意一个候选中继设备，远端设备向候选中继设备发送第二被测信号；
候选中继设备根据第二被测信号确定第二直通链路的信道质量信息，并将确定的第二直通链路的信道质量信息返回给远端设备；
远端设备接收候选中继设备返回的第二直通链路的信道质量信息。
具体的，远端设备向候选中继设备发送第二被测信号，候选中继设备在接收到远端设备发送的第二被测信号后，根据第二被测信号确定第二直通链路的信道质量信息，然后候选中继设备将第二直通链路的信道质量信息发送给远端设备，继而远端设备确定与候选中继设备的第二直通链路的信道质量 信息。
其中，远端设备向候选中继设备发送的第二被测信号可以是同步、广播、参考信号、信令、数据中的至少一种。
本申请实施例候选中继设备根据第二被测信号确定的第二直通链路的信道质量信息包括：CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、误块率、误码率、HARQ信息(ACK、NACK)中的至少一个。
其中，针对不同类型的信道质量信息，候选中继设备根据第二被测信号确定第二直通链路的信道质量信息的方式不同：
1、信道质量信息包括CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI中的至少一个；
候选中继设备对第二被测信号进行测量得到第二直通链路的信道质量信息，并将第二直通链路的信道质量信息发送给远端设备；
2、信道质量信息包括误块率、误码率中的至少一个；
候选中继设备根据第二被测信号确定第二直通链路的信道质量信息；
具体的，远端设备向候选中继设备发送第二被测信号，候选中继设备根据接收到的上述第二被测信号数据包，确定第二直通链路的误块率、误码率，并将第二直通链路的误块率、误码率发送给远端设备。
或候选中继设备对ACK的数目与NACK的数目进行统计得到第二直通链路的误块率、误码率，并将第二直通链路的误块率、误码率发送给远端设备。
需要说明的是，误块率与误码率需要进行一段时间的数据统计才能得到，若选择误块率、误码率作为信道质量信息的参数，候选中继设备可以对预设时长内的接收到的远端设备发送的第二被测信号数据包的正确和错误进行统计，得到该候选中继设备对应的第二直通链路的误块率、误码率。
或者，也可以通过远端设备确定第二直通链路的误块率、误码率：
具体的，远端设备向候选中继设备发送第二被测信号，候选中继设备确定HARQ反馈，并向远端设备进行HARQ反馈，远端设备根据HARQ反馈 确定第二直通链路的误块率、误码率。
其中，远端设备对ACK的数目与NACK的数目进行统计得到第二直通链路的误块率、误码率。
3、信道质量信息包括HARQ信息；
候选中继设备确定第二被测信号对应的HARQ反馈，并生成HARQ信息；
或者，也可以通过远端设备确定第二直通链路的HARQ信息；
具体的，候选中继设备确定第二被测信号对应的HARQ反馈，并将第二被测信号对应的HARQ反馈发送给远端设备，远端设备根据预设时长内接收到的HARQ反馈进行统计生成HARQ信息。
其中，HARQ信息中包含候选中继设备根据第二被测信号确定的ACK的数目以及NACK的数目。通过HARQ信息中的ACK的数目以及NACK的数目反映远端设备与该候选中继设备之间的第二直通链路的信道质量。
候选中继设备将第二直通链路的信道质量信息发送给远端设备时，一种可选的实施方式为，通过PC5信道的HARQ反馈或PC5接口测量报告等机制，向远端设备发送Sidelink CSI报告或SL(Sidelink)-RSRP报告或HARQ反馈，远端设备根据接收到的Sidelink CSI报告或SL-RSRP报告或HARQ反馈得到第二直通链路的信道质量信息。
远端设备根据上述方式确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息后，从至少一个候选中继设备中选择使用的中继设备。
一种可选的实施方式为，针对任意一个候选中继设备，将候选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，判断候选中继设备是否为备选中继设备；从确定出的备选中继设备中选择使用的中继设备。
具体的，针对任意一个候选中继设备，将候选中继设备对应的第一直通链路的信道质量信息包括的参数与对应的门限值进行比较，将候选中继设备对应的第二直通链路的信道质量信息包括的参数与对应的门限值进行比较， 判断该候选中继设备是否为备选中继设备，再从确定出的备选中继设备中选择使用的中继设备。
其中，在将候选中继设备对应的第一直通链路的信道质量信息包括的参数与对应的门限值进行比较，以及将候选中继设备对应的第二直通链路的信道质量信息包括的参数与对应的门限值进行比较时，将满足第一预设条件的候选中继设备确定为备选中继设备，其中，第一预设条件包括下列条件中的部分或全部：
条件1、若信道质量信息包括CSI，第一直通链路的CSI不小于第一门限值，且第二直通链路的CSI不小于第二门限值；
条件2、若信道质量信息包括CQI，第一直通链路的CQI不小于第三门限值，且第二直通链路的CQI不小于第四门限值；
条件3、若信道质量信息包括RI，第一直通链路的RI不小于第五门限值，且第二直通链路的RI不小于第六门限值；
条件4、若信道质量信息包括SINR，第一直通链路的SINR不小于第七门限值，且第二直通链路的SINR不小于第八门限值；
条件5、若信道质量信息包括RSRP，第一直通链路的RSRP不小于第九门限值，且第二直通链路的RSRP不小于第十门限值；
条件6、若信道质量信息包括RSRQ，第一直通链路的RSRQ不小于第十一门限值，且第二直通链路的RSRQ不小于第十二门限值；
条件7、若信道质量信息包括RSSI，第一直通链路的RSSI不小于第十三门限值，且第二直通链路的RSSI不小于第十四门限值；
条件8、若信道质量信息包括误块率，第一直通链路的误块率不大于第十五门限值，且第二直通链路的误块率不大于第十六门限值；
条件9、若信道质量信息包括误码率，第一直通链路的误码率不大于第十七门限值，且第二直通链路的误码率不大于第十八门限值；
条件10、若信道质量信息包括HARQ信息，第一直通链路的ACK的数目不小于第十九门限值，且第二直通链路的ACK的数目不小于第二十门限值； 或者，第一直通链路的NACK的数目不大于第二十一门限值，且第二直通链路的NACK的数目不大于第二十二门限值。
其中，上述门限值为预先配置或由网络侧设备配置给远端设备的。
例如，对于连接态终端，网络通过专用信令配置，对于在网终端，网络通过广播信令配置，对于脱网终端，通过预配置的方式配置上述门限值。也可以，对于任何终端，都是通过预配置的方式配置上述门限值。本申请实施例对上述门限值的具体数值不做限定，可以是本领域技术人员的经验数值。
并且，对于任一种信道质量信息，第一直通链路的信道质量信息对应的门限值与第二直通链路的信道质量信息对应的门限值可以相同或不同。例如，对于信道质量信息CSI，第一门限值与第二门限值可以相同或不同。
需要说明的是，在直通链路的信道指令信息包括多个参数时，则在确定每个参数满足对应的条件时，确定候选中继设备可以作为备选中继设备。
例如，对于任一候选中继设备，若信道质量信息包含CSI和误块率，当候选中继设备对应的第一直通链路的CSI的数值不小于第一门限值，且第二直通链路的CSI的数值不小于第二门限值，且第一直通链路的误块率的数值不大于第十五门限值，且第二直通链路的误块率的数值不大于第十六门限值时，确定该候选中继设备为备选中继设备。
在根据各个候选中继设备对应的双向直通链路的信道质量信息确定出备选中继设备后，从确定出的备选中继设备中选择使用的中继设备：
一种可选的实施方式为，若确定出至少两个备选中继设备，则根据备选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，从所述至少两个备选中继设备中选择使用的中继设备。
具体的，若确定出的备选中继设备只有一个，则将备选中继设备作为使用的中继设备；
若确定出至少两个备选中继设备，则根据每个备选中继设备对应的双向直通链路的信道质量信息对备选中继设备进行综合排序，根据排序结果选择 一个或多个作为使用的中继设备。
实施中，可以按照每个备选中继设备对应的第一直通链路的信道质量信息包括的参数的大小和第二直通链路的信道质量信息包括的参数的大小，对备选中继设备进行排序；
若信道质量信息包括CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、HARQ信息中的ACK数目中的至少一个，则可以根据下列方式对多个备选中继设备进行排序：
1、若信道质量信息包括CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、HARQ信息中的ACK数目中的一个；
在一种可选的实施方式中，针对任意一个备选中继设备，将该备选中继设备对应的第一直通链路的信道质量信息包括的参数的数值，与该备选中继设备对应的第二直通链路的信道质量信息包括的参数的数值求和，作为该备选中继设备对应的排序指标；根据每个备选中继设备对应的排序指标，可以按照从大到小的顺序进行排序。
或根据第一直通链路和第二直通链路的优先级，对优先级高的链路上的信道质量信息参数的数值进行排序。其中直通链路的优先级可以是预配置或网络配置。
2、若信道质量信息包括CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、HARQ信息中的ACK数目中的至少两个；
在一种可选的实施方式中，针对任意一个备选中继设备，确定该备选中继设备对应的第一直通链路的信道质量信息包括的参数的数值之和，以及确定该备选中继设备对应的第二直通链路的信道质量信息中包括的参数的数值之和，并将确定出的两个直通链路的和值再求和得到该备选中继设备对应的排序指标；根据每个备选中继设备对应的排序指标，可以按照从大到小的顺序进行排序。
或根据第一直通链路和第二直通链路的优先级，对优先级高的链路上的信道质量信息参数的数值之和进行排序。其中直通链路的优先级可以是预配 置或网络配置。
在一种可选的实施方式中，还可以为备选中继设备对应的第一直通链路的信道质量信息、第二直通链路的信道质量信息分配不同的权重，根据每个直通链路对应的权重进行求和；或者，在信道质量信息包括多个参数时，针对每个参数还可以分配不同的权重，根据每个参数对应的权重进行求和。
需要说明的是，上述对备选中继设备进行综合排序的方式仅是示例的，也可以根据其他方式对备选中继设备进行综合排序。
若信道质量信息包括误块率、误码率、HARQ信息中的NACK数目中的至少一个，则可以根据下列方式对多个备选中继设备进行排序：
1、若信道质量信息包括误块率、误码率、HARQ信息中的NACK数目中的一个；
在一种可选的实施方式中，针对任意一个备选中继设备，将该备选中继设备对应的第一直通链路的信道质量信息包括的参数的数值，与该备选中继设备对应的第二直通链路的信道质量信息包括的参数的数值求和，作为该备选中继设备对应的排序指标；根据每个备选中继设备对应的排序指标，可以按照从小到大的顺序进行排序。
或根据第一直通链路和第二直通链路的优先级，对优先级高的链路上的信道质量信息参数的数值进行排序。其中直通链路的优先级可以是预配置或网络配置。
2、若信道质量信息包括误块率、误码率、HARQ信息中的NACK数目中的至少两个；
在一种可选的实施方式中，针对任意一个备选中继设备，确定该备选中继设备对应的第一直通链路的信道质量信息包括的参数的数值之和，以及确定该备选中继设备对应的第二直通链路的信道质量信息中包括的参数的数值之和，并将确定出的两个直通链路的和值再求和得到该备选中继设备对应的排序指标；根据每个备选中继设备对应的排序指标，可以按照从小到大的顺序进行排序。
或根据第一直通链路和第二直通链路的优先级，对优先级高的链路上的信道质量信息参数的数值之和进行排序。其中直通链路的优先级可以是预配置或网络配置。
在一种可选的实施方式中，还可以为备选中继设备对应的第一直通链路的信道质量信息、第二直通链路的信道质量信息分配不同的权重，根据每个直通链路对应的权重进行求和；或者，在信道质量信息包括两个参数时，针对每个参数还可以分配不同的权重，根据每个参数对应的权重进行求和。
需要说明的是，上述对备选中继设备进行综合排序的方式仅是示例的，也可以根据其他方式对备选中继设备进行综合排序。
若信道质量信息包括CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、HARQ信息中的ACK数目中的至少一个，以及包括误块率、误码率、HARQ信息中的NACK数目中的至少一个，则可以根据下列方式对多个备选中继设备进行排序：
在一种可选的实施方式中，针对任意一个备选中继设备，确定该备选中继设备对应的第一直通链路的信道质量信息包括的CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、HARQ信息中的ACK数目中的至少一个参数的数值，与误块率、误码率、HARQ信息中的NACK数目中至少一个参数的数值的倒数之和，以及确定该备选中继设备对应的第二直通链路的信道质量信息中包括的CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、HARQ信息中的ACK数目中的至少一个参数的数值与误块率、误码率、HARQ信息中的NACK数目中至少一个参数的数值的倒数之和，并将确定出的两个直通链路的和值再求和得到该备选中继设备对应的排序指标；根据每个备选中继设备对应的排序指标，可以按照从大到小的顺序进行排序。
或根据第一直通链路和第二直通链路的优先级，对优先级高的链路上的信道质量信息包括的CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、HARQ信息中的ACK数目中的至少一个参数的数值，与误块率、误码率、HARQ信息中的NACK数目中至少一个参数的数值的倒数之和进行排序。其中直通链 路的优先级可以是预配置或网络配置的。
在一种可选的实施方式中，还可以为备选中继设备对应的第一直通链路的信道质量信息、第二直通链路的信道质量信息分配不同的权重，根据每个直通链路对应的权重进行求和；或者，在信道质量信息包括多个参数时，针对每个参数还可以分配不同的权重，根据每个参数对应的权重进行求和。
需要说明的是，上述对备选中继设备进行综合排序的方式仅是示例的，也可以根据其他方式对备选中继设备进行综合排序。
如图3所示，为本申请实施例提供的中继设备的选择方法的交互流程图，其中，以远端设备为UE1，候选中继设备分别为UE2和UE3为例。
步骤301、UE1向UE2、UE3发送第二被测信号；
步骤302、UE2、UE3根据第二被测信号确定与UE1的第二直通链路的信道质量信息；
步骤303、UE2、UE3向UE1发送第一被测信号，以及第二直通链路的信道质量信息；
步骤304、UE1根据UE2发送的第一被测信号确定与UE2的第一直通链路的信道质量信息，以及根据UE3发送的第一被测信号确定与UE2的第一直通链路的信道质量信息；
步骤305、UE1根据UE2对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息，判断UE2是否为备选中继设备，以及根据UE3对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息，判断UE3是否为备选中继设备；
步骤306、UE1从确定出的备选中继设备中选择使用的中继设备。
本申请实施例提供的中继设备的选择方法适用于为远端设备的初始选择中继设备的过程，也适用于远端设备在确定需要重选中继后进行中继重选的过程中。
如图4所示，本申请实施例提供的一种确定重选中继设备的系统，包括：中继设备41、远端设备42；其中，中继设备41为远端设备42当前使用的中 继设备。
中继设备41，用于确定用于辅助远端设备42判断是否重新选择使用的中继设备的辅助信息；并向远端设备42发送辅助信息；
远端设备42，用于根据辅助信息确定需要重新选择使用的中继设备，并根据远端设备42与至少一个候选中继设备的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备。
其中，中继设备与远端设备之间进行直通链路交互，可以是任何直通信道的传输，例如物理直通链路控制信道(Physical Sidelink Control Channel，PSCCH)、物理直通链路共享信道(Physical Sidelink Shared Channel，PSSCH)、物理直通链路广播信道(Physical Sidelink Broadcast Channel，PSBCH)、或同步信号等。
实施中，中继设备确定用于辅助远端设备判断是否重新选择使用的中继设备的辅助信息，并将辅助信息发送给远端设备，远端设备在接收到辅助信息后根据辅助信息判断是否进行中继重选。
其中，根据辅助信息类型不同，本申请实施例远端设备可以根据下列方式判断是否进行中继重选。
方法一：远端设备根据远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备。
其中，辅助信息包括第三被测信号和第四直通链路的信道质量信息；
实施中，中继设备向远端设备发送第三被测信号，远端设备根据中继设备发送的第三被测信号确定第三直通链路的信道质量信息；
以及，中继设备向远端设备发送第四被测信号，中继设备根据远端设备发送的第四被测信号确定第四直通链路的信道质量信息，并将第四直通链路的信道质量信息发送给远端设备；
远端设备根据远端设备与中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备。
其中，第三直通链路为中继设备向远端设备发送信息的直通链路，第四直通链路为中继设备从远端设备接收信息的直通链路。
具体的，远端设备向中继设备发送第四被测信号，中继设备根据远端设备发送的第四被测信号确定第四直通链路的信道质量信息，中继设备向远端设备发送第三被测信号以及第四直通链路的信道质量信息；远端设备根据中继设备发送的第三被测信号确定第三直通链路的信道质量信息；远端设备根据第三直通链路的信道质量信息和第四直通链路的信道质量信息，判断是否需要重新选择使用的中继设备，若需要重新选择中继设备，则根据本申请实施例提供的中继选择方法进行中继设备的重选。
其中，第三被测信号和第四被测信号可以是同步、广播、参考信号、信令、数据中的一种；
第三直通链路的信道质量信息和第四直通链路的信道质量信息包括：CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、误块率、误码率、混合自动重传请求HARQ信息(ACK、NACK)中的至少一个。
其中，针对不同类型的信道质量信息，远端设备根据第三被测信号确定第三直通链路的信道质量信息的方式不同：
1、信道质量信息包括CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI中的至少一个；
远端设备对第三被测信号进行测量得到第三直通链路的信道质量信息；
2、信道质量信息包括误块率、误码率中的至少一个；
远端设备根据第三被测信号确定第三直通链路的信道质量信息；
具体的，中继设备向远端设备发送第三被测信号，远端设备根据接收到的上述第三被测信号数据包，确定第三直通链路的误块率、误码率。
或远端设备对ACK的数目与NACK的数目进行统计得到第三直通链路的误块率、误码率。
需要说明的是，误块率与误码率需要进行一段时间的数据统计才能得到，若选择误块率、误码率作为信道质量信息的参数，远端设备可以对预设时长 内的接收到的中继设备发送的第三被测信号数据包的正确和错误进行统计，得到当前使用的中继设备对应的第三直通链路的误块率、误码率。
3、信道质量信息包括HARQ信息；
远端设备确定第三被测信号对应的HARQ反馈，并生成HARQ信息；
其中，HARQ信息中包含远端设备根据第三被测信号确定的ACK的数目以及NACK的数目。通过HARQ信息中的ACK的数目以及NACK的数目反映远端设备与当前使用的中继设备之间的第三直通链路的信道质量。
以及，针对不同类型的信道质量信息，中继设备根据第四被测信号确定第四直通链路的信道质量信息的方式不同：
1、信道质量信息包括CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI中的至少一个；
中继设备对第四被测信号进行测量得到第四直通链路的信道质量信息，并将第四直通链路的信道质量信息发送给远端设备；
2、信道质量信息包括误块率、误码率中的至少一个；
中继设备根据第四被测信号确定第四直通链路的信道质量信息；
具体的，远端设备向中继设备发送第四被测信号，中继设备根据接收到的上述第四被测信号数据包确定第四直通链路的误块率、误码率，并将第四直通链路的误块率、误码率发送给远端设备。
或中继设备对ACK的数目与NACK的数目进行统计得到第四直通链路的误块率、误码率。
需要说明的是，误块率与误码率需要进行一段时间的数据统计才能得到，若选择误块率、误码率作为信道质量信息的参数，中继设备可以对预设时长内的接收到的远端设备发送的第四被测信号数据包的正确和错误进行统计，得到当前使用的中继设备对应的第四直通链路的误块率、误码率。
或者，也可以通过远端设备确定第四直通链路的误块率、误码率：
具体的，远端设备向中继设备发送第四被测信号，中继设备确定HARQ反馈，并向远端设备进行HARQ反馈，远端设备根据HARQ反馈确定第四直 通链路的误块率、误码率。
其中，远端设备对ACK的数目与NACK的数目进行统计得到第四直通链路的误块率、误码率。
3、信道质量信息包括HARQ信息；
中继设备确定第四被测信号对应的HARQ反馈，并生成HARQ信息；
或者，也可以通过远端设备确定第四直通链路的HARQ信息；
具体的，中继设备确定第四被测信号对应的HARQ反馈，并将第四被测信号对应的HARQ反馈发送给远端设备，远端设备根据预设时长内接收到的HARQ反馈进行统计生成HARQ信息。
其中，HARQ信息中包含中继设备根据第四被测信号确定的ACK的数目以及NACK的数目。通过HARQ信息中的ACK的数目以及NACK的数目反映远端设备与当前使用的中继设备之间的第四直通链路的信道质量。
中继设备将第四直通链路的信道质量信息发送给远端设备时，一种可选的实施方式为，通过PC5信道的HARQ反馈或PC5接口测量报告等机制，向远端设备发送Sidelink CSI报告或SL-RSRP报告或HARQ反馈，远端设备根据接收到的Sidelink CSI报告或SL-RSRP报告或HARQ反馈得到第四直通链路的信道质量信息。
远端设备在接收到辅助信息后根据辅助信息判断是否进行中继重选，当辅助信息为第三被测信号和第四直通链路的信道质量信息时，远端设备根据确定出的第三直通链路的信道质量信息以及接收到的第四直通链路的信道质量信息判断是否需要重新选择中继设备。
一种可选的实施方式为，远端设备将中继设备对应的第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果确定需要重新选择使用的中继设备。
具体的，远端设备将第三直通链路的信道质量信息包括的参数与对应的门限值进行比较，将第四直通链路的信道质量信息包括的参数与对应的门限值进行比较，根据比较结果判断是否需要重新选择使用的中继设备。
其中，在将中继设备对应的第三直通链路的信道质量信息包括的参数与对应的门限值进行比较，以及将中继设备对应的第四直通链路的信道质量信息包括的参数与对应的门限值进行比较后，若比较结果满足第二预设条件，远端设备确定需要重新选择使用的中继设备。其中，第二预设条件包括下列条件中的一种：
条件1、若信道质量信息包括CSI，第三直通链路的CSI小于第二十三门限值，和/或第四直通链路的CSI小于第二十四门限值；
条件2、若信道质量信息包括CQI，第三直通链路的CQI小于第二十五门限值，和/或第四直通链路的CQI小于第二十六门限值；
条件3、若信道质量信息包括RI，第三直通链路的RI小于第二十七门限值，和/或第四直通链路的RI小于第二十八门限值；
条件4、若信道质量信息包括SINR，第三直通链路的SINR小于第二十九门限值，和/或第四直通链路的SINR小于第三十门限值；
条件5、若信道质量信息包括RSRP，第三直通链路的RSRP小于第三十一门限值，和/或第四直通链路的RSRP小于第三十二门限值；
条件6、若信道质量信息包括RSRQ，第三直通链路的RSRQ小于第三十三门限值，和/或第四直通链路的RSRQ小于第三十四门限值；
条件7、若信道质量信息包括RSSI，第三直通链路的RSSI小于第三十五门限值，和/或第四直通链路的RSSI小于第三十六门限值；
条件8、若信道质量信息包括误块率，第三直通链路的误块率大于第三十七门限值，和/或第四直通链路的误块率大于第三十八门限值；
条件9、若信道质量信息包括误码率，第三直通链路的误码率大于第三十九门限值，和/或第四直通链路的误码率大于第四十门限值；
条件10、若信道质量信息包括HARQ信息，第三直通链路的ACK的数目小于第四十一门限值，和/或第四直通链路的ACK的数目小于第四十二门限值；或者，第三直通链路的NACK的数目大于第四十三门限值，且第四直通链路的NACK的数目大于第四十四门限值。
其中，上述门限值为预先配置或由网络侧设备配置给远端设备的。例如，对于连接态终端，网络通过专用信令配置，对于在网终端，网络通过广播信令配置，对于脱网终端，通过预配置的方式配置上述门限值。也可以，对于任何终端，都是通过预配置的方式配置上述门限值。本申请实施例对上述门限值的具体数值不做限定，可以是本领域技术人员的经验数值。
对于当前使用的中继设备与远端设备之间的双向直通链路的信道质量信息，任一方向上的信道质量信息的参数满足第二预设条件时，需要进行中继设备的重选。例如，对于当前使用的中继设备，若信道质量信息仅包括RSRQ，下列三种情形均确定需要重新选择使用的中继设备：
情形一：第三直通链路的RSRQ小于第三十三门限值、第四直通链路的RSRQ不小于第三十四门限值；
情形二：第三直通链路的RSRQ不小于第三十三门限值、第四直通链路的RSRQ小于第三十四门限值；
情形三：第三直通链路的RSRQ小于第三十三门限值且第四直通链路的RSRQ小于第三十四门限值。
当第三直通链路的RSRQ不小于第三十三门限值、且第四直通链路的RSRQ不小于第三十四门限值时，远端设备确定不进行中继设备的重新选择。
如图5所示，为本申请实施例提供的中继设备的选择方法的交互流程图，其中，远端设备为UE1，中继设备为UE2，中继设备UE2为与当前使用的中继设备。
步骤501、UE2向UE1发送第三被测信号；
步骤502、UE1根据UE2发送的第三被测信号确定与UE2的第三直通链路的信道质量信息；
步骤503、UE1向UE2发送第四被测信号；
步骤504、UE2根据第四被测信号确定与UE1的第四直通链路的信道质量信息。
步骤505、UE2将第四直通链路的信道质量信息发送给UE1。
步骤506、UE1根据第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备。
其中，步骤501～步骤502、步骤503～步骤505执行的先后顺序不作限定，可以先执行步骤501～步骤502后执行步骤503～步骤505，或先执行步骤503～步骤505后执行步骤501～步骤502，或者步骤501～步骤502、步骤503～步骤505可以同时执行；
并且，UE2可以向UE1同时发送第三被测信号和第四直通链路的信道质量信息。
方法二：中继设备在确定远端设备需要重新选择使用的中继设备后，指示远端设备重新选择使用的中继设备。
其中，辅助信息为用于表示需要重新选择使用的中继设备的指示信息。
中继设备可以根据下列方式确定远端设备需要重新选择使用的中继设备：
方式1、中继设备根据中继设备与远端设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息生成用于表示需要重新选择使用的中继设备的指示信息。
其中，第三直通链路为中继设备向远端设备发送信息的直通链路，第四直通链路为中继设备从远端设备接收信息的直通链路。
当远端设备与当前使用的中继设备之间进行通信的第三直通链路或者第四直通链路的信道质量较差时，则中继设备生成指示信息，指示远端设备需要重新选择使用的中继设备。
方式2、中继设备根据中继设备与网络侧设备之间的蜂窝通信链路质量，生成用于表示需要重新选择使用的中继设备的指示信息。
需要说明的是，由于远端设备为基站覆盖边缘或者基站覆盖外的设备，远端设备通过中继设备与网络侧设备之间进行通信，若当前使用的中继设备与网络侧设备之间的蜂窝通信链路Uulink质量较差，则中继设备生成指示信息，指示远端设备需要重新选择使用的中继设备。
方式3、中继设备根据中继设备的工作状态，生成用于表示需要重新选择 使用的中继设备的指示信息。
其中，中继设备的工作状态可以是中继设备的电量、负荷等，若中继设备的工作状态较差，例如，中继设备的电量较低，或者与当前使用的中继设备进行通信的远端设备较多造成的当前使用的中继设备的负荷较大等情况下，则中继设备生成指示信息，指示远端设备需要重新选择使用的中继设备。
远端设备接收到中继设备发送的指示信息后，确定需要重新选择使用的中继设备。
本申请实施例主要对中继设备根据与远端设备的第三直通链路的信道质量信息和第四直通链路的信道质量信息生成指示信息的方式进行介绍。
实施中，中继设备根据双向直通链路的信道质量信息确定是否需要重新选择使用的中继设备，若中继设备确定需要重新选择当前使用的中继设备，则生成指示信息，中继设备将生成的指示信息发送给远端设备，远端设备在接收到指示信息后，确定需要重新选择使用的中继设备。
一种可选的实施方式为，中继设备根据下列方式确定第三直通链路的信道质量信息：
中继设备向远端设备发送第三被测信号，远端设备根据第三被测信号确定第三直通链路的信道质量信息，并将第三直通链路的信道质量信息返回给中继设备；
中继设备接收远端设备返回的根据第三被测信号确定第三直通链路的信道质量信息。
其中，中继设备向远端设备发送的第三被测信号可以是同步、广播、参考信号、信令、数据中的至少一种。
本申请实施例远端设备根据第三被测信号确定的第三直通链路的信道质量信息包括：CSI、CQI、RI、SINR、RSRP、RSRQ、RSSI、误块率、误码率、HARQ信息(ACK、NACK)中的至少一个。
需要说明的是，远端设备根据第三被测信号确定第三直通链路的信道质量信息的方式，以及中继设备根据第四被测信号确定第四直通链路的信道质 量信息的方式可以参见上文描述。
远端设备将第三直通链路的信道质量信息发送给中继设备时，一种可选的实施方式为，通过PC5信道的HARQ反馈或PC5接口测量报告等机制，向中继设备发送sidelink CSI报告或SL-RSRP报告或HARQ反馈，中继设备根据接收到的sidelink CSI报告或SL-RSRP报告或HARQ反馈得到第三直通链路的信道质量信息。
中继设备根据上述方式确定第三直通链路的信道质量信息和第四直通链路的信道质量信息后，根据第三直通链路的信道质量信息和第四直通链路的信道质量信息判断是否生成指示信息。
一种可选的实施方式为，中继设备将所述第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果生成所述指示信息。
具体的，中继设备将第三直通链路的信道质量信息包括的参数与对应的门限值进行比较，将第四直通链路的信道质量信息包括的参数与对应的门限值进行比较，判断是否需要重新选择使用的中继设备，若需要重新选择使用的中继设备，则生成指示信息。
其中，在将第三直通链路的信道质量信息包括的参数与对应的门限值进行比较，以及将第四直通链路的信道质量信息包括的参数与对应的门限值进行比较时，若比较结果满足第二预设条件，中继设备确定需要重新选择使用的中继设备。其中，第二预设条件包括下列条件中的一种：
条件1、若信道质量信息包括CSI，第三直通链路的CSI小于第二十三门限值，和/或第四直通链路的CSI小于第二十四门限值；
条件2、若信道质量信息包括CQI，第三直通链路的CQI小于第二十五门限值，和/或第四直通链路的CQI小于第二十六门限值；
条件3、若信道质量信息包括RI，第三直通链路的RI小于第二十七门限值，和/或第四直通链路的RI小于第二十八门限值；
条件4、若信道质量信息包括SINR，第三直通链路的SINR小于第二十 九门限值，和/或第四直通链路的SINR小于第三十门限值；
条件5、若信道质量信息包括RSRP，第三直通链路的RSRP小于第三十一门限值，和/或第四直通链路的RSRP小于第三十二门限值；
条件6、若信道质量信息包括RSRQ，第三直通链路的RSRQ小于第三十三门限值，和/或第四直通链路的RSRQ小于第三十四门限值；
条件7、若信道质量信息包括RSSI，第三直通链路的RSSI小于第三十五门限值，和/或第四直通链路的RSSI小于第三十六门限值；
条件8、若信道质量信息包括误块率，第三直通链路的误块率大于第三十七门限值，和/或第四直通链路的误块率大于第三十八门限值；
条件9、若信道质量信息包括误码率，第三直通链路的误码率大于第三十九门限值，和/或第四直通链路的误码率大于第四十门限值；
条件10、若信道质量信息包括HARQ信息，第三直通链路的ACK的数目小于第四十一门限值，和/或第四直通链路的ACK的数目小于第四十二门限值；或者，第三直通链路的NACK的数目大于第四十三门限值，且第四直通链路的NACK的数目大于第四十四门限值。
其中，上述门限值为预先配置或由网络侧设备配置给远端设备的。例如，对于连接态终端，网络通过专用信令配置，对于在网终端，网络通过广播信令配置，对于脱网终端，通过预配置的方式配置上述门限值。也可以，对于任何终端，都是通过预配置的方式配置上述门限值。本申请实施例对上述门限值的具体数值不做限定，可以是本领域技术人员的经验数值。
对于当前使用的中继设备与远端设备之间的双向直通链路的信道质量信息，任一方向上的信道质量信息的参数满足第二预设条件时，需要进行中继设备的重选。例如，若信道质量信息仅包括误块率，下列三种情形均确定需要重新选择使用的中继设备：
若信道质量信息包括误块率，第三直通链路的误块率大于第三十七门限值，和/或第四直通链路的误块率大于第三十八门限值；
情形一：第三直通链路的误块率大于第三十七门限值、第四直通链路的 误块率不大于第三十八门限值；
情形二：第三直通链路的误块率不大于第三十七门限值、第四直通链路的误块率大于第三十八门限值；
情形三：第三直通链路的误块率大于第三十七门限值且第四直通链路的误块率大于第三十八门限值。
当第三直通链路的误块率不大于第三十七门限值、第四直通链路的误块率不大于第三十八门限值时，中继设备确定不进行中继设备的重新选择。
如图6所示，为本申请实施例提供的中继设备的选择方法的交互流程图，其中，远端设备为UE1，中继设备为UE2，中继设备UE2为与当前使用的中继设备。
步骤601、UE2向UE1发送第三被测信号；
步骤602、UE1根据UE2发送的第三被测信号确定与UE2的第三直通链路的信道质量信息；
步骤603、UE1将第三直通链路的信道质量信息发送给UE2；
步骤604、UE1向UE2发送第四被测信号；
步骤605、UE2根据第四被测信号确定与UE1的第四直通链路的信道质量信息；
步骤606、UE2根据第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备，生成指示信息；
步骤607、UE2向UE1发送指示信息；
步骤608、UE1接收到指示信息后确定需要重新选择使用的中继设备。
其中，步骤601～步骤603、步骤604～步骤605执行的先后顺序不作限定，可以先执行步骤601～步骤603后执行步骤604～步骤605，或先执行步骤604～步骤605后执行步骤601～步骤603，或者步骤601～步骤603、步骤604～步骤605可以同时执行；
并且，UE1可以向UE2同时发送第三直通链路的信道质量信息和第四被测信号。
由上可见，本申请实施例提供的触发远端设备进行中继重选的方法中，由中继设备或远端设备根据双向直通链路的信道质量信息，判断是否需要重新选择使用的中继设备，若确定需要进行中继设备的重新选择，触发远端设备进行中继设备的重选。根据双向直通链路的信道质量信息判断是否进行中继设备的重选，提高了判断是否进行中继设备重选的可靠性。
基于同一发明构思，本申请实施例中还提供了一种远端设备，由于该设备解决问题的原理与本申请实施例中继设备的选择方法相似，因此该设备的实施可以参见方法的实施，重复之处不再赘述。
如图7所示，本申请实施例一种进行反馈的第一终端，包括：处理器700、存储器701、收发机702以及总线接口。
处理器700负责管理总线架构和通常的处理，存储器701可以存储处理器700在执行操作时所使用的数据。收发机703用于在处理器700的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器700代表的一个或多个处理器和存储器701代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器700负责管理总线架构和通常的处理，存储器701可以存储处理器700在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器700中，或者由处理器700实现。在实现过程中，信号处理流程的各步骤可以通过处理器700中的硬件的集成逻辑电路或者软件形式的指令完成。处理器700可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列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701，处理器700读取存储器701中的信息，结合其硬件完成信号处理流程的步骤。
具体地，处理器700，用于读取存储器701中的程序并执行：
确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；其中，所述第一直通链路为所述候选中继设备向远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路；
根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备。
可选的，所述处理器700具体用于：
针对任意一个候选中继设备，根据所述候选中继设备发送的第一被测信号确定所述第一直通链路的信道质量信息。
可选的，所述处理器700具体用于：
针对任意一个候选中继设备，通过所述收发机702向所述候选中继设备发送第二被测信号，以使所述候选中继设备根据所述第二被测信号确定所述第二直通链路的信道质量信息；
通过所述收发机702接收所述候选中继设备返回的根据所述第二被测信号确定的所述第二直通链路的信道质量信息。
可选的，所述处理器700具体用于：
针对任意一个候选中继设备，将所述候选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，判断所述候选中继设备是否为备选中继设备；
从确定出的备选中继设备中选择使用的中继设备。
可选的，所述处理器700具体用于：
若确定出至少两个备选中继设备，则根据备选中继设备对应的第一直通 链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，从所述至少两个备选中继设备中选择使用的中继设备。
可选的，所述处理器700还用于：
根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备；
其中，所述第三直通链路为所述当前使用的中继设备向远端设备发送信息的直通链路，所述第四直通链路为所述当前使用的中继设备从所述远端设备接收信息的直通链路。
可选的，所述处理器700具体用于：
根据所述当前使用的中继设备发送的第三被测信号确定所述第三直通链路的信道质量信息。
可选的，所述处理器700具体用于：
通过所述收发机702向所述当前使用的中继设备发送第四被测信号，以使所述当前使用的中继设备根据所述第四被测信号确定所述第四直通链路的信道质量信息；
通过所述收发机702接收所述当前使用的中继设备返回的根据所述第四被测信号确定的所述第四直通链路的信道质量信息。
可选的，所述处理器700具体用于：
将当前使用的中继设备对应的第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果确定需要重新选择使用的中继设备。
可选的，所述处理器700还用于：
通过所述收发机702接收到当前使用的中继设备发送的指示信息后，确定需要重新选择使用的中继设备；
其中，所述指示信息为所述当前使用的中继设备确定远端设备需要重新选择使用的中继设备后发送的。
可选的，所述参数对应的门限值为预先配置或由网络侧设备配置给所述 远端设备的。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
如图8所示，本申请实施例一种候选中继设备，包括：处理器800、存储器801、收发机802以及总线接口。
处理器800负责管理总线架构和通常的处理，存储器801可以存储处理器800在执行操作时所使用的数据。收发机802用于在处理器800的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器800代表的一个或多个处理器和存储器801代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器800负责管理总线架构和通常的处理，存储器801可以存储处理器800在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器800中，或者由处理器800实现。在实现过程中，信号处理流程的各步骤可以通过处理器800中的硬件的集成逻辑电路或者软件形式的指令完成。处理器800可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列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801，处理器800读取存储器801中的信息，结合其硬件完成信号处 理流程的步骤。
具体地，处理器800，用于读取存储器801中的程序并执行：
通过所述收发机802向远端设备发送第一被测信号，以使所述远端设备根据所述第一被测信号确定所述远端设备与候选中继设备之间的第一直通链路的信道质量信息；以及
根据所述远端设备发送的第二被测信号确定所述候选中继设备与所述远端设备之间的第二直通链路的信道质量信息，并通过所述收发机802向所述远端设备发送所述第二直通链路的信道质量信息，以使所述远端设备根据所述候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
如图9所示，本申请实施例一种中继设备，包括：处理器900、存储器901、收发机902以及总线接口。
处理器900负责管理总线架构和通常的处理，存储器901可以存储处理器900在执行操作时所使用的数据。收发机902用于在处理器900的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器900代表的一个或多个处理器和存储器901代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器900负责管理总线架构和通常的处理，存 储器901可以存储处理器900在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器900中，或者由处理器900实现。在实现过程中，信号处理流程的各步骤可以通过处理器900中的硬件的集成逻辑电路或者软件形式的指令完成。处理器900可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列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901，处理器900读取存储器901中的信息，结合其硬件完成信号处理流程的步骤。
具体地，处理器900，用于读取存储器901中的程序并执行：
确定用于辅助所述远端设备判断是否重新选择使用的中继设备的辅助信息；
通过所述收发机902向所述远端设备发送所述辅助信息，以使所述远端设备根据所述辅助信息确定需要重新选择使用的中继设备，并根据所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
可选的，所述辅助信息包括第三被测信号和第四直通链路的信道质量信息；
所述处理器900具体用于：
通过所述收发机902向所述远端设备发送第三被测信号，以及所述中继 设备根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息，并通过所述收发机902将所述第四直通链路的信道质量信息发送给所述远端设备，以使所述远端设备根据所述第三被测信号确定第三直通链路的信道质量信息，并根据所述第三直通链路的信道质量信息和所述第四直通链路的信道质量信息确定需要重新选择使用的中继设备；
其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路。
可选的，所述辅助信息为用于表示需要重新选择使用的中继设备的指示信息；
所述处理器900具体用于：
根据所述中继设备与所述远端设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息；其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路；或
根据所述中继设备与网络侧设备之间的蜂窝通信链路质量，生成用于表示需要重新选择使用的中继设备的指示信息；或
根据所述中继设备的工作状态，生成用于表示需要重新选择使用的中继设备的指示信息。
可选的，所述处理器900具体用于：
通过所述收发机902向所述远端设备发送第三被测信号，以使所述远端设备根据所述第三被测信号确定所述第三直通链路的信道质量信息；
通过所述收发机902接收所述远端设备返回的根据所述第三被测信号确定所述第三直通链路的信道质量信息。
可选的，所述处理器900具体用于：
根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质 量信息。
可选的，所述处理器900具体用于：
将所述第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果生成所述指示信息。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
如图10所示，本申请实施例一种远端设备，包括：
第一确定模块1001，用于确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路；
选择模块1002，用于根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备。
可选的，所述第一确定模块1001具体用于：
针对任意一个候选中继设备，根据所述候选中继设备发送的第一被测信号确定所述第一直通链路的信道质量信息。
可选的，所述第一确定模块1001具体用于：
针对任意一个候选中继设备，向所述候选中继设备发送第二被测信号，以使所述候选中继设备根据所述第二被测信号确定所述第二直通链路的信道质量信息；
接收所述候选中继设备返回的根据所述第二被测信号确定的所述第二直通链路的信道质量信息。
可选的，所述选择模块1002具体用于：
针对任意一个候选中继设备，将所述候选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，判断所述候选中继设备是否为备选中继设备；
从确定出的备选中继设备中选择使用的中继设备。
可选的，所述选择模块1002具体用于：
若确定出至少两个备选中继设备，则根据备选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，从所述至少两个备选中继设备中选择使用的中继设备。
可选的，还包括：
第一触发模块，用于根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备；
其中，所述第三直通链路为所述当前使用的中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述当前使用的中继设备从所述远端设备接收信息的直通链路。
可选的，所述第一触发模块具体用于：
根据所述当前使用的中继设备发送的第三被测信号确定所述第三直通链路的信道质量信息。
可选的，所述第一触发模块具体用于：
向所述当前使用的中继设备发送第四被测信号，以使所述当前使用的中继设备根据所述第四被测信号确定所述第四直通链路的信道质量信息；
接收所述当前使用的中继设备返回的根据所述第四被测信号确定的所述第四直通链路的信道质量信息。
可选的，所述第一触发模块具体用于：
将当前使用的中继设备对应的第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果确定需要重新选择使用的中继设备。
可选的，还包括：
第二触发模块，用于接收到当前使用的中继设备发送的指示信息后，确定需要重新选择使用的中继设备；
其中，所述指示信息为所述当前使用的中继设备确定远端设备需要重新选择使用的中继设备后发送的。
可选的，所述参数对应的门限值为预先配置或由网络侧设备配置给所述远端设备的。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
如图11所示，本申请实施例一种候选中继设备，包括：
一种候选中继设备，包括：
发送模块1101，用于向远端设备发送第一被测信号，以使所述远端设备根据所述第一被测信号确定所述远端设备与所述候选中继设备之间的第一直通链路的信道质量信息；以及
测量模块1102，用于根据所述远端设备发送的第二被测信号确定所述候选中继设备与所述远端设备之间的第二直通链路的信道质量信息，并向所述远端设备发送所述第二直通链路的信道质量信息，以使所述远端设备根据所述候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号 强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
如图12所示，本申请实施例中继设备，包括：
第二确定模块1201，用于确定用于辅助所述远端设备判断是否重新选择使用的中继设备的辅助信息；
重选模块1202，用于向所述远端设备发送所述辅助信息，以使所述远端设备根据所述辅助信息确定需要重新选择使用的中继设备，并根据所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
可选的，所述辅助信息包括第三被测信号和第四直通链路的信道质量信息；
所述第二确定模块1201具体用于：
向所述远端设备发送第三被测信号，以及所述中继设备根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息，并将所述第四直通链路的信道质量信息发送给所述远端设备，以使所述远端设备根据所述第三被测信号确定第三直通链路的信道质量信息，并根据所述第三直通链路的信道质量信息和所述第四直通链路的信道质量信息确定需要重新选择使用的中继设备；
其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路。
可选的，所述辅助信息为用于表示需要重新选择使用的中继设备的指示信息；
所述第二确定模块1201具体用于：
根据所述中继设备与所述远端设备之间的第三直通链路的信道质量信息 和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息；其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路；或
根据所述中继设备与网络侧设备之间的蜂窝通信链路质量，生成用于表示需要重新选择使用的中继设备的指示信息；或
根据所述中继设备的工作状态，生成用于表示需要重新选择使用的中继设备的指示信息。
可选的，所述第二确定模块1201具体用于：
向所述远端设备发送第三被测信号，以使所述远端设备根据所述第三被测信号确定所述第三直通链路的信道质量信息；
接收所述远端设备返回的根据所述第三被测信号确定所述第三直通链路的信道质量信息。
可选的，所述第二确定模块1201具体用于：
根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息。
可选的，所述第二确定模块1201具体用于：
将所述第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果生成所述指示信息。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
需要说明的是，本申请实施例中提供的中继设备中功能模块的划分仅是示例的，如图11、图12所示的功能划分方式用于体现中继设备在不同场景下所实现的功能，本申请实施例中提供的中继设备还可以具有图11、图12所示 的中继设备的部分或全部功能模块。
本申请实施例还提供一种计算机可存储介质，其上存储有计算机程序，该程序被处理器执行时实现如上述任一方法的步骤。
基于同一发明构思，本申请实施例中提供中继设备的选择方法，由于该方法对应的是本申请实施例中继设备的选择系统中的远端设备，并且该方法解决问题的原理与该系统相似，因此该方法的实施可以参见系统的实施，重复之处不再赘述。
如图13所示，本申请实施例一种中继终端的选择方法，包括：
步骤1301、远端设备确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；
步骤1302、远端设备根据候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息，从至少一个候选中继设备中选择使用的中继设备。
其中，第一直通链路为候选中继设备向远端设备发送信息的直通链路，第二直通链路为候选中继设备从远端设备接收信息的直通链路。
可选的，所述远端设备根据下列方式确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息：
针对任意一个候选中继设备，所述远端设备根据所述候选中继设备发送的第一被测信号确定所述第一直通链路的信道质量信息。
可选的，所述远端设备根据下列方式确定所述远端设备与至少一个候选中继设备之间的第二直通链路的信道质量信息：
针对任意一个候选中继设备，所述远端设备向所述候选中继设备发送第二被测信号，以使所述候选中继设备根据所述第二被测信号确定所述第二直通链路的信道质量信息；
所述远端设备接收所述候选中继设备返回的根据所述第二被测信号确定的所述第二直通链路的信道质量信息。
可选的，所述远端设备根据候选中继设备对应的所述第一直通链路的信 道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备，包括：
针对任意一个候选中继设备，将所述候选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，判断所述候选中继设备是否为备选中继设备；
从确定出的备选中继设备中选择使用的中继设备。
可选的，所述从确定出的备选中继设备中选择使用的中继设备，包括：
若确定出至少两个备选中继设备，则根据备选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，从所述至少两个备选中继设备中选择使用的中继设备。
可选的，在所述远端设备确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息之前，还包括：
所述远端设备根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备；
其中，所述第三直通链路为所述当前使用的中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述当前使用的中继设备从所述远端设备接收信息的直通链路。
可选的，所述远端设备根据下列方式确定所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息：
所述远端设备根据所述当前使用的中继设备发送的第三被测信号确定所述第三直通链路的信道质量信息。
可选的，所述远端设备根据下列方式确定所述远端设备与当前使用的中继设备之间的第四直通链路的信道质量信息：
所述远端设备向所述当前使用的中继设备发送第四被测信号，以使所述当前使用的中继设备根据所述第四被测信号确定所述第四直通链路的信道质 量信息；
所述远端设备接收所述当前使用的中继设备返回的根据所述第四被测信号确定的所述第四直通链路的信道质量信息。
可选的，所述远端设备根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备，包括：
所述远端设备将当前使用的中继设备对应的第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果确定需要重新选择使用的中继设备。
可选的，在所述远端设备确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息之前，还包括：
所述远端设备接收到当前使用的中继设备发送的指示信息后，确定需要重新选择使用的中继设备；
其中，所述指示信息为所述当前使用的中继设备确定远端设备需要重新选择使用的中继设备后发送的。
可选的，所述参数对应的门限值为预先配置或由网络侧设备配置给所述远端设备的。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
基于同一发明构思，本申请实施例中提供一种中继终端的选择方法，由于该方法对应的是本申请实施例中继终端的选择系统中的任一候选中继设备，并且该方法解决问题的原理与该系统相似，因此该方法的实施可以参见系统的实施，重复之处不再赘述。
如图14所示，本申请实施例一种中继终端的选择方法，包括：
步骤1401、候选中继设备向远端设备发送第一被测信号，以使远端设备根据第一被测信号确定远端设备与候选中继设备之间的第一直通链路的信道质量信息；
步骤1402、候选中继设备根据远端设备发送的第二被测信号确定候选中继设备与远端设备之间的第二直通链路的信道质量信息，并向远端设备发送第二直通链路的信道质量信息，以使远端设备根据候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备。
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
如图15所示，本申请实施例一种中继终端的选择方法，包括：
步骤1501、中继设备确定用于辅助远端设备判断是否重新选择使用的中继设备的辅助信息；
步骤1502、中继设备向远端设备发送辅助信息，以使远端设备根据辅助信息确定需要重新选择使用的中继设备，并根据远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
可选的，所述辅助信息包括第三被测信号和第四直通链路的信道质量信息；
所述中继设备向所述远端设备发送所述辅助信息，包括：
所述中继设备向所述远端设备发送第三被测信号，以及所述中继设备根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息，并将所述第四直通链路的信道质量信息发送给所述远端设备，以使所述远端设备根据所述第三被测信号确定第三直通链路的信道质量信息，并根据所述第三直通链路的信道质量信息和所述第四直通链路的信道质量信息确定需要重新选择使用的中继设备；
其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路。
可选的，所述辅助信息为用于表示需要重新选择使用的中继设备的指示信息；
所述中继设备确定用于辅助所述远端设备判断是否重新选择使用的中继设备的辅助信息，包括：
所述中继设备根据所述中继设备与所述远端设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息；其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路；或
所述中继设备根据所述中继设备与网络侧设备之间的蜂窝通信链路质量，生成用于表示需要重新选择使用的中继设备的指示信息；或
所述中继设备根据所述中继设备的工作状态，生成用于表示需要重新选择使用的中继设备的指示信息。
可选的，所述中继设备根据下列方式确定所述第三直通链路的信道质量信息：
所述中继设备向所述远端设备发送第三被测信号，以使所述远端设备根据对所述第三被测信号确定所述第三直通链路的信道质量信息；
所述中继设备接收所述远端设备返回的根据所述第三被测信号确定所述第三直通链路的信道质量信息。
可选的，所述中继设备根据下列方式确定所述第四直通链路的信道质量信息：
所述中继设备根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息。
可选的，所述中继设备根据所述中继设备与所述远端设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息，包括：
所述中继设备将所述第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果生成所述指示信息。
可选的，所述信道质量信息包括下列参数中的部分或全部：
信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图 一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (64)

  1. 一种中继设备的选择方法，其特征在于，该方法包括：
    远端设备确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路；
    所述远端设备根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备。
  2. 如权利要求1所述的方法，其特征在于，所述远端设备根据下列方式确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息：
    针对任意一个候选中继设备，所述远端设备根据所述候选中继设备发送的第一被测信号确定所述第一直通链路的信道质量信息。
  3. 如权利要求1所述的方法，其特征在于，所述远端设备根据下列方式确定所述远端设备与至少一个候选中继设备之间的第二直通链路的信道质量信息：
    针对任意一个候选中继设备，所述远端设备向所述候选中继设备发送第二被测信号，以使所述候选中继设备根据所述第二被测信号确定所述第二直通链路的信道质量信息；
    所述远端设备接收所述候选中继设备返回的根据所述第二被测信号确定的所述第二直通链路的信道质量信息。
  4. 如权利要求1所述的方法，其特征在于，所述远端设备根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备，包括：
    针对任意一个候选中继设备，将所述候选中继设备对应的第一直通链路 的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，判断所述候选中继设备是否为备选中继设备；
    从确定出的备选中继设备中选择使用的中继设备。
  5. 如权利要求4所述的方法，其特征在于，所述从确定出的备选中继设备中选择使用的中继设备，包括：
    若确定出至少两个备选中继设备，则根据备选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，从所述至少两个备选中继设备中选择使用的中继设备。
  6. 如权利要求1所述的方法，其特征在于，在所述远端设备确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息之前，还包括：
    所述远端设备根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备；
    其中，所述第三直通链路为所述当前使用的中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述当前使用的中继设备从所述远端设备接收信息的直通链路。
  7. 如权利要求6所述的方法，其特征在于，所述远端设备根据下列方式确定所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息：
    所述远端设备根据所述当前使用的中继设备发送的第三被测信号确定所述第三直通链路的信道质量信息。
  8. 如权利要求6所述的方法，其特征在于，所述远端设备根据下列方式确定所述远端设备与当前使用的中继设备之间的第四直通链路的信道质量信息：
    所述远端设备向所述当前使用的中继设备发送第四被测信号，以使所述当前使用的中继设备根据所述第四被测信号确定所述第四直通链路的信道质 量信息；
    所述远端设备接收所述当前使用的中继设备返回的根据所述第四被测信号确定的所述第四直通链路的信道质量信息。
  9. 如权利要求6所述的方法，其特征在于，所述远端设备根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备，包括：
    所述远端设备将当前使用的中继设备对应的第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果确定需要重新选择使用的中继设备。
  10. 如权利要求1所述的方法，其特征在于，在所述远端设备确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息之前，还包括：
    所述远端设备接收到当前使用的中继设备发送的指示信息后，确定需要重新选择使用的中继设备；
    其中，所述指示信息为所述当前使用的中继设备确定远端设备需要重新选择使用的中继设备后发送的。
  11. 如权利要求4或9所述的方法，其特征在于，所述参数对应的门限值为预先配置或由网络侧设备配置给所述远端设备的。
  12. 如权利要求1～10任一项所述的方法，其特征在于，所述信道质量信息包括下列参数中的部分或全部：
    信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
  13. 一种中继设备的选择方法，其特征在于，该方法包括：
    候选中继设备向远端设备发送第一被测信号，以使所述远端设备根据所述第一被测信号确定所述远端设备与所述候选中继设备之间的第一直通链路的信道质量信息；以及
    所述候选中继设备根据所述远端设备发送的第二被测信号确定所述候选中继设备与所述远端设备之间的第二直通链路的信道质量信息，并向所述远端设备发送所述第二直通链路的信道质量信息，以使所述远端设备根据所述候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
    其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
  14. 如权利要求13所述的方法，其特征在于，所述信道质量信息包括下列参数中的部分或全部：
    信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
  15. 一种中继设备的选择方法，其特征在于，该方法包括：
    中继设备确定用于辅助远端设备判断是否重新选择使用的中继设备的辅助信息；
    所述中继设备向所述远端设备发送所述辅助信息，以使所述远端设备根据所述辅助信息确定需要重新选择使用的中继设备，并根据所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
    其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
  16. 如权利要求15所述的方法，其特征在于，所述辅助信息包括第三被测信号和第四直通链路的信道质量信息；
    所述中继设备向所述远端设备发送所述辅助信息，包括：
    所述中继设备向所述远端设备发送第三被测信号，以及所述中继设备根 据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息，并将所述第四直通链路的信道质量信息发送给所述远端设备，以使所述远端设备根据所述第三被测信号确定第三直通链路的信道质量信息，并根据所述第三直通链路的信道质量信息和所述第四直通链路的信道质量信息确定需要重新选择使用的中继设备；
    其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路。
  17. 如权利要求15所述的方法，其特征在于，所述辅助信息为用于表示需要重新选择使用的中继设备的指示信息；
    所述中继设备确定用于辅助所述远端设备判断是否重新选择使用的中继设备的辅助信息，包括：
    所述中继设备根据所述中继设备与所述远端设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息；其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路；或
    所述中继设备根据所述中继设备与网络侧设备之间的蜂窝通信链路质量，生成用于表示需要重新选择使用的中继设备的指示信息；或
    所述中继设备根据所述中继设备的工作状态，生成用于表示需要重新选择使用的中继设备的指示信息。
  18. 如权利要求17所述的方法，其特征在于，所述中继设备根据下列方式确定所述第三直通链路的信道质量信息：
    所述中继设备向所述远端设备发送第三被测信号，以使所述远端设备根据所述第三被测信号确定所述第三直通链路的信道质量信息；
    所述中继设备接收所述远端设备返回的根据所述第三被测信号确定的所述第三直通链路的信道质量信息。
  19. 如权利要求17所述的方法，其特征在于，所述中继设备根据下列方式确定所述第四直通链路的信道质量信息：
    所述中继设备根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息。
  20. 如权利要求17所述的方法，其特征在于，所述中继设备根据所述中继设备与所述远端设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息，包括：
    所述中继设备将所述第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果生成所述指示信息。
  21. 如权利要求15～20任一项所述的方法，其特征在于，所述信道质量信息包括下列参数中的部分或全部：
    信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
  22. 一种远端设备，其特征在于，包括处理器、存储器和收发机；
    其中，所述处理器，用于读取存储器中的程序并执行：
    确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；其中，所述第一直通链路为所述候选中继设备向远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路；
    根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备。
  23. 如权利要求22所述的远端设备，其特征在于，所述处理器具体用于，根据下列方式确定所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息：
    针对任意一个候选中继设备，根据所述候选中继设备发送的第一被测信号确定所述第一直通链路的信道质量信息。
  24. 如权利要求22所述的远端设备，其特征在于，所述处理器具体用于，根据下列方式确定所述远端设备与至少一个候选中继设备之间的第二直通链路的信道质量信息：
    针对任意一个候选中继设备，向所述候选中继设备发送第二被测信号，以使所述候选中继设备根据所述第二被测信号确定所述第二直通链路的信道质量信息；接收所述候选中继设备返回的根据所述第二被测信号确定的所述第二直通链路的信道质量信息。
  25. 如权利要求22所述的远端设备，其特征在于，所述处理器具体用于：
    针对任意一个候选中继设备，将所述候选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，判断所述候选中继设备是否为备选中继设备；
    从确定出的备选中继设备中选择使用的中继设备。
  26. 如权利要求25所述的远端设备，其特征在于，所述处理器具体用于：
    若确定出至少两个备选中继设备，则根据备选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，从所述至少两个备选中继设备中选择使用的中继设备。
  27. 如权利要求22所述的远端设备，其特征在于，所述处理器还用于：
    根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备；
    其中，所述第三直通链路为所述当前使用的中继设备向远端设备发送信息的直通链路，所述第四直通链路为所述当前使用的中继设备从所述远端设备接收信息的直通链路。
  28. 如权利要求27所述的远端设备，其特征在于，所述处理器具体用于：根据下列方式确定所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息：
    根据所述当前使用的中继设备发送的第三被测信号确定所述第三直通链路的信道质量信息。
  29. 如权利要求27所述的远端设备，其特征在于，所述处理器具体用于：根据下列方式确定所述远端设备与当前使用的中继设备之间的第四直通链路的信道质量信息：
    向所述当前使用的中继设备发送第四被测信号，以使所述当前使用的中继设备根据所述第四被测信号确定所述第四直通链路的信道质量信息；接收所述当前使用的中继设备返回的根据所述第四被测信号确定的所述第四直通链路的信道质量信息。
  30. 如权利要求27所述的远端设备，其特征在于，所述处理器具体用于：
    将当前使用的中继设备对应的第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果确定需要重新选择使用的中继设备。
  31. 如权利要求22所述的远端设备，其特征在于，所述处理器还用于：
    通过所述收发机接收到当前使用的中继设备发送的指示信息后，确定需要重新选择使用的中继设备；
    其中，所述指示信息为所述当前使用的中继设备确定远端设备需要重新选择使用的中继设备后发送的。
  32. 如权利要求25或31所述的远端设备，其特征在于，所述参数对应的门限值为预先配置或由网络侧设备配置给所述远端设备的。
  33. 如权利要求22～31任一项所述的远端设备，其特征在于，所述信道质量信息包括下列参数中的部分或全部：
    信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
  34. 一种中继设备，其特征在于，包括处理器、存储器和收发机；
    其中，所述处理器，用于读取存储器中的程序并执行：
    通过所述收发机向远端设备发送第一被测信号，以使所述远端设备根据所述第一被测信号确定所述远端设备与候选中继设备之间的第一直通链路的信道质量信息；以及
    根据所述远端设备发送的第二被测信号确定所述候选中继设备与所述远端设备之间的第二直通链路的信道质量信息，并通过所述收发机向所述远端设备发送所述第二直通链路的信道质量信息，以使所述远端设备根据所述候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
    其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
  35. 如权利要求34所述的中继设备，其特征在于，所述信道质量信息包括下列参数中的部分或全部：
    信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
  36. 一种中继设备，其特征在于，包括处理器、存储器和收发机；
    其中，所述处理器，用于读取存储器中的程序并执行：
    确定用于辅助远端设备判断是否重新选择使用的中继设备的辅助信息；
    通过所述收发机向所述远端设备发送所述辅助信息，以使所述远端设备根据所述辅助信息确定需要重新选择使用的中继设备，并根据所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
    其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
  37. 如权利要求36所述的中继设备，其特征在于，所述辅助信息包括第 三被测信号和第四直通链路的信道质量信息；
    所述处理器具体用于：
    通过所述收发机向所述远端设备发送第三被测信号，以及所述中继设备根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息，并通过所述收发机将所述第四直通链路的信道质量信息发送给所述远端设备，以使所述远端设备根据所述第三被测信号确定第三直通链路的信道质量信息，并根据所述第三直通链路的信道质量信息和所述第四直通链路的信道质量信息确定需要重新选择使用的中继设备；
    其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路。
  38. 如权利要求36所述的中继设备，其特征在于，所述辅助信息为用于表示需要重新选择使用的中继设备的指示信息；
    所述处理器具体用于：
    根据所述中继设备与所述远端设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息；其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路；或
    根据所述中继设备与网络侧设备之间的蜂窝通信链路质量，生成用于表示需要重新选择使用的中继设备的指示信息；或
    根据所述中继设备的工作状态，生成用于表示需要重新选择使用的中继设备的指示信息。
  39. 如权利要求38所述的中继设备，其特征在于，所述处理器具体用于，根据下列方式确定所述第三直通链路的信道质量信息：
    向所述远端设备发送第三被测信号，以使所述远端设备根据所述第三被测信号确定所述第三直通链路的信道质量信息；接收所述远端设备返回的根 据所述第三被测信号确定的所述第三直通链路的信道质量信息。
  40. 如权利要求38所述的中继设备，其特征在于，所述处理器具体用于，根据下列方式确定所述第四直通链路的信道质量信息：
    根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息。
  41. 如权利要求38所述的中继设备，其特征在于，所述处理器具体用于：
    将所述第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果生成所述指示信息。
  42. 如权利要求36～41任一所述的中继设备，其特征在于，所述信道质量信息包括下列参数中的部分或全部：
    信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
  43. 一种远端设备，其特征在于，包括：
    第一确定模块，用于确定远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息；其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路；
    选择模块，用于根据候选中继设备对应的所述第一直通链路的信道质量信息和第二直通链路的信道质量信息，从所述至少一个候选中继设备中选择使用的中继设备。
  44. 如权利要求43所述的远端设备，其特征在于，所述第一确定模块具体用于：
    针对任意一个候选中继设备，根据所述候选中继设备发送的第一被测信号确定所述第一直通链路的信道质量信息。
  45. 如权利要求43所述的远端设备，其特征在于，所述第一确定模块具 体用于：
    针对任意一个候选中继设备，向所述候选中继设备发送第二被测信号，以使所述候选中继设备根据所述第二被测信号确定所述第二直通链路的信道质量信息；
    接收所述候选中继设备返回的根据所述第二被测信号确定的所述第二直通链路的信道质量信息。
  46. 如权利要求43所述的远端设备，其特征在于，所述选择模块具体用于：
    针对任意一个候选中继设备，将所述候选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，判断所述候选中继设备是否为备选中继设备；
    从确定出的备选中继设备中选择使用的中继设备。
  47. 如权利要求46所述的远端设备，其特征在于，所述选择模块具体用于：
    若确定出至少两个备选中继设备，则根据备选中继设备对应的第一直通链路的信道质量信息包括的参数和第二直通链路的信道质量信息包括的参数，从所述至少两个备选中继设备中选择使用的中继设备。
  48. 如权利要求43所述的远端设备，其特征在于，还包括：
    第一触发模块，用于根据所述远端设备与当前使用的中继设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，确定需要重新选择使用的中继设备；
    其中，所述第三直通链路为所述当前使用的中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述当前使用的中继设备从所述远端设备接收信息的直通链路。
  49. 如权利要求48所述的远端设备，其特征在于，所述第一触发模块具体用于：
    根据所述当前使用的中继设备发送的第三被测信号确定所述第三直通链 路的信道质量信息。
  50. 如权利要求48所述的远端设备，其特征在于，所述第一触发模块具体用于：
    向所述当前使用的中继设备发送第四被测信号，以使所述当前使用的中继设备根据所述第四被测信号确定所述第四直通链路的信道质量信息；
    接收所述当前使用的中继设备返回的根据所述第四被测信号确定的所述第四直通链路的信道质量信息。
  51. 如权利要求48所述的远端设备，其特征在于，所述第一触发模块具体用于：
    将当前使用的中继设备对应的第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果确定需要重新选择使用的中继设备。
  52. 如权利要求43所述的远端设备，其特征在于，还包括：
    第二触发模块，用于接收到当前使用的中继设备发送的指示信息后，确定需要重新选择使用的中继设备；
    其中，所述指示信息为所述当前使用的中继设备确定远端设备需要重新选择使用的中继设备后发送的。
  53. 如权利要求46或51所述的远端设备，其特征在于，所述参数对应的门限值为预先配置或由网络侧设备配置给所述远端设备的。
  54. 如权利要求43～52任一所述的远端设备，其特征在于，所述信道质量信息包括下列参数中的部分或全部：
    信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
  55. 一种中继设备，其特征在于，包括：
    发送模块，用于向远端设备发送第一被测信号，以使所述远端设备根据所述第一被测信号确定所述远端设备与候选中继设备之间的第一直通链路的 信道质量信息；以及
    测量模块，用于根据所述远端设备发送的第二被测信号确定所述候选中继设备与所述远端设备之间的第二直通链路的信道质量信息，并向所述远端设备发送所述第二直通链路的信道质量信息，以使所述远端设备根据所述候选中继设备对应的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
    其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
  56. 如权利要求55所述的中继设备，其特征在于，所述信道质量信息包括下列参数中的部分或全部：
    信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
  57. 一种中继设备，其特征在于，包括：
    第二确定模块，用于确定用于辅助远端设备判断是否重新选择使用的中继设备的辅助信息；
    重选模块，用于向所述远端设备发送所述辅助信息，以使所述远端设备根据所述辅助信息确定需要重新选择使用的中继设备，并根据所述远端设备与至少一个候选中继设备之间的第一直通链路的信道质量信息和第二直通链路的信道质量信息选择使用的中继设备；
    其中，所述第一直通链路为所述候选中继设备向所述远端设备发送信息的直通链路，所述第二直通链路为所述候选中继设备从所述远端设备接收信息的直通链路。
  58. 如权利要求57所述的中继设备，其特征在于，所述辅助信息包括第三被测信号和第四直通链路的信道质量信息；
    所述第二确定模块具体用于：
    向所述远端设备发送第三被测信号，以及所述中继设备根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息，并将所述第四直通链路的信道质量信息发送给所述远端设备，以使所述远端设备根据所述第三被测信号确定第三直通链路的信道质量信息，并根据所述第三直通链路的信道质量信息和所述第四直通链路的信道质量信息确定需要重新选择使用的中继设备；
    其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路。
  59. 如权利要求57所述的中继设备，其特征在于，所述辅助信息为用于表示需要重新选择使用的中继设备的指示信息；
    所述第二确定模块具体用于：
    根据所述中继设备与所述远端设备之间的第三直通链路的信道质量信息和第四直通链路的信道质量信息，生成用于表示需要重新选择使用的中继设备的指示信息；其中，所述第三直通链路为所述中继设备向所述远端设备发送信息的直通链路，所述第四直通链路为所述中继设备从所述远端设备接收信息的直通链路；或
    根据所述中继设备与网络侧设备之间的蜂窝通信链路质量，生成用于表示需要重新选择使用的中继设备的指示信息；或
    根据所述中继设备的工作状态，生成用于表示需要重新选择使用的中继设备的指示信息。
  60. 如权利要求59所述的中继设备，其特征在于，所述第二确定模块具体用于：
    向所述远端设备发送第三被测信号，以使所述远端设备根据所述第三被测信号确定所述第三直通链路的信道质量信息；
    接收所述远端设备返回的根据所述第三被测信号确定所述第三直通链路的信道质量信息。
  61. 如权利要求59所述的中继设备，其特征在于，所述第二确定模块具体用于：
    根据所述远端设备发送的第四被测信号确定所述第四直通链路的信道质量信息。
  62. 如权利要求59所述的中继设备，其特征在于，所述第二确定模块具体用于：
    将所述第三直通链路的信道质量信息包括的参数和第四直通链路的信道质量信息包括的参数，与参数对应的门限值进行比较，根据比较结果生成所述指示信息。
  63. 如权利要求57～62任一所述的中继设备，其特征在于，所述信道质量信息包括下列参数中的部分或全部：
    信道状态信息CSI、信道质量指标CQI、秩信息RI、信号与干扰加噪声比SINR、参考信号接收功率RSRP、参考信号接收质量RSRQ、接收的信号强度指示RSSI、误块率、误码率、混合自动重传请求HARQ信息。
  64. 一种计算机可存储介质，其上存储有计算机程序，其特征在于，该程序被处理器执行时实现如权利要求1～12任一所述方法的步骤，或实现如权利要求13～14任一所述方法的步骤，或实现如权利要求15～21任一所述方法的步骤。
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WO2023208562A1 (en) * 2022-04-29 2023-11-02 Nokia Technologies Oy Mode-1 sidelink direct communication-based relay selection during path switch
WO2023225830A1 (zh) * 2022-05-23 2023-11-30 北京小米移动软件有限公司 中继连接方法及装置

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