WO2018228443A1 - 信号传输方法、相关装置及系统 - Google Patents

信号传输方法、相关装置及系统 Download PDF

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Publication number
WO2018228443A1
WO2018228443A1 PCT/CN2018/091109 CN2018091109W WO2018228443A1 WO 2018228443 A1 WO2018228443 A1 WO 2018228443A1 CN 2018091109 W CN2018091109 W CN 2018091109W WO 2018228443 A1 WO2018228443 A1 WO 2018228443A1
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WIPO (PCT)
Prior art keywords
link
reference signal
configuration information
relay
resource configuration
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PCT/CN2018/091109
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English (en)
French (fr)
Inventor
秦熠
吴明
栗忠峰
张弛
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP18817480.9A priority Critical patent/EP3633884B1/en
Publication of WO2018228443A1 publication Critical patent/WO2018228443A1/zh
Priority to US16/714,408 priority patent/US11438081B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H04B7/06966—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping using beam correspondence; using channel reciprocity, e.g. downlink beam training based on uplink sounding reference signal [SRS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a signal transmission method, related apparatus, and system.
  • the LTE/LTE-A system supports relay transmission.
  • the relay system there are three types of nodes: base station, relay, and terminal.
  • the link between the base station and the relay is a backhaul link (BH)
  • the link between the relay and the terminal is an access link (AC).
  • the existence of the relay is invisible to the user in consideration of the compatibility problem with the users of the early system. Therefore, the design of the AC link directly multiplexes the single-hop link design of the LTE.
  • the relay system can be a multi-hop relay system.
  • a multi-hop relay system may have multiple backhaul links and one access link.
  • the 3-hop relay system shown in FIG. 1B includes two relay nodes, the link between the base station and the relay 1 is the backhaul link 1, and the link between the relay 1 and the relay 2 is back.
  • Link 2 the link between the relay 2 and the terminal is the access link.
  • the base station configures the user to measure the CSI-RS on the channel state information reference signal (CSI-RS) resource to obtain the channel quality.
  • the base station configures the terminal to measure the strength of the interference noise on a zero-power CSI-RS (zero power CSI-RS, ZP-CSI-RS).
  • the base station only controls or indicates base-to-terminal transmissions.
  • each device can only control other devices accessing the device, it is impossible to control the transmission of other links, thereby making it impossible to perform interference measurement across links.
  • the present application provides a signal transmission method, a related device and a system, which can measure interference between links in a multi-hop relay system, and thus can avoid such interference by means of beam selection and the like.
  • the present application provides a signal transmission method, which is applied to a first device side, where the method includes: receiving, by a first device, reference signal resource configuration information sent by a second device, and then indicating, in the reference signal resource configuration information, The reference signal is transmitted or received on the reference signal resource.
  • the present application provides a signal transmission method, which is applied to a second device side, where the method includes: the second device sends reference signal resource configuration information to the first device, where the resource indicated by the reference signal resource configuration information Send or receive a reference signal.
  • the reference signal is used for interference measurement between the first link and the second link, wherein the first link is between the first device and the fourth device Link, the second link is a link between the second device and the third device, and the first device and the second device are the third device and the fourth device Relay node between.
  • the main scheme for performing interference measurement using the reference signal may include:
  • the second device may be an interference measurement configured by the first device.
  • the interference between the first link and the second link may also be measured by using a reference signal on the link between the second device and the first device (ie, the third link).
  • the main options can include:
  • the second device may configure an uplink reference signal (such as SRS) resource for the first device, where the uplink reference signal (such as SRS) is used for interference measurement of downlink transmission of the first link and downlink transmission of the second link.
  • the first device may send the uplink reference signal on the third link.
  • the second device may receive the uplink reference signal by using a receiving device corresponding to the second link, and perform channel measurement.
  • the measurement result corresponding to the uplink reference signal may be used by the second device to determine interference of the first device with the second device. That is, the downlink transmission of the first link interferes with the downlink transmission of the second link.
  • the premise of the foregoing solution 3 is that the first device transmitting the reference signal on the third link may be equivalent to the first device transmitting the reference signal on the first link.
  • This premise can be implemented by: the antenna port of the first device transmitting the reference signal on the third link and the first link is quasi co-location (QCL), or the first device is on the third link and the first The beams transmitting the reference signals on the link are the same.
  • QCL quasi co-location
  • the first device since the first device transmits the reference signal on the third link, the first device can transmit the reference signal on the first link. Therefore, the uplink reference signal received by the second device by using the receiving device corresponding to the second link may be equivalent to the interference generated by the reference signal sent by the first device on the first link to the second device. That is, the downlink transmission of the first link interferes with the downlink transmission of the second link.
  • the fourth device may configure a downlink reference signal (such as a CSI-RS) resource for the first device, where the downlink reference signal (such as CSI-RS) is used for uplink transmission of the second link to the uplink of the first link.
  • a downlink reference signal such as a CSI-RS
  • the second device may send the downlink reference signal by using a transmitting device corresponding to the second link.
  • the first device receives the uplink reference signal on the third link and performs channel measurement.
  • the measurement result corresponding to the uplink reference signal may be used by the first device to determine interference of the second device with the first device, that is, interference of the uplink transmission of the second link to the uplink transmission of the first link.
  • the premise of the foregoing scheme 4 is that the first device receiving the reference signal on the third link may be equivalent to the first device receiving the reference signal on the first link.
  • This premise can be implemented by: the antenna port of the first device receiving the reference signal on the third link and the first link is quasi co-location (QCL), or the first device is on the third link and the first The beams receiving the reference signals on the link are identical.
  • QCL quasi co-location
  • the first device since the first device receives the reference signal on the third link, the first device can receive the reference signal on the first link, the downlink reference signal received by the first device can be equivalent to the first
  • the two devices may use the transmitting device corresponding to the second link to send the interference generated by the downlink reference signal to the first device. That is, the uplink transmission of the second link interferes with the uplink transmission of the first link.
  • the first device has multi-link beam correspondence capability.
  • the multi-link beam correspondence capability of the first device may be summarized as: the first device sends or receives an antenna port with a quasi-co-located QCL relationship on the first link and the third link.
  • the multi-link beam correspondence capability of the first device may also be summarized as: the first device transmits or receives a reference signal using the same beam or the same spatial filter on the first link and the third link. ability.
  • the spatial filter can be at least one of: precoding, weight of the antenna port, phase deflection of the antenna port, and amplitude gain of the antenna port.
  • the first link of the first device is the uplink first link between the first device and the terminal
  • the back link of the first device is the uplink third link between the first device and the second device.
  • the interference measurement type corresponding to the reference signal used for interference measurement between links may include the following two types:
  • the first type of measurement the interference measurement of the downlink transmission of the access link to the downlink transmission of the backhaul link 1, or the measurement of the interference of the access link downlink transmission to the relay 1.
  • a second type of measurement the measurement of the interference of the uplink transmission of the backhaul link 1 to the uplink transmission of the access link, or the measurement of the interference of the uplink transmission of the link 1 to the relay 2.
  • the measurement type corresponding to the reference signal may be indicated in several ways:
  • the relay 1 may carry the indication information of the foregoing measurement type in the resource configuration information sent to the relay 2.
  • the reserved field in the existing resource configuration information is extended, and the extended reserved field is used to indicate the above measurement type.
  • the relay 1 may additionally send indication information to the relay 2, where the indication information is used to indicate the above measurement type.
  • the indication information may be referred to as first indication information.
  • the reference signal resource can be associated with the measurement type.
  • a reference signal mapped on a resource characterized by a "resource pattern" (or set) 1 is used for the interference measurement of the first measurement type described above, mapped to a "resource pattern (or set) 2" representation.
  • the reference signal on the resource is used for the interference measurement of the second measurement type described above.
  • the examples are merely illustrative of the application and should not be construed as limiting.
  • the association may be predefined by a protocol or static or semi-static by high-level signaling. Regarding the specific implementation of such association, the application is not limited.
  • the first device may send the first report information to the second device, for reporting whether the first device has multi-link beam correspondence capability.
  • the second device may further report, to the third device, whether the first device has multi-link beam correspondence capability.
  • the multi-link beam correspondence capability is reported to the second device by the first device, so that the second device determines whether the interference measurement method is adopted according to whether the first device has the beam correspondence capability.
  • the second device may determine whether the first device has a beam correspondence capability and adopt a solution corresponding to the above embodiment.
  • the second device may configure the first device to send the downlink reference signal (such as CSI-RS) on the first link.
  • the downlink reference signal such as CSI-RS
  • the second device may configure the first device to send an uplink reference signal (such as SRS) on the third link.
  • the second device may also configure the first device to send a downlink reference signal (such as a CSI-RS) on the first link.
  • the second device may configure the first device to receive the uplink reference signal (such as SRS), and may refer to the foregoing solution 2.
  • the uplink reference signal such as SRS
  • the second device may configure the first device to receive a downlink reference signal (such as a CSI-RS) on the third link.
  • a downlink reference signal such as a CSI-RS
  • the second device may also configure the first device to receive the uplink reference signal (such as SRS), and may refer to the foregoing solution 2.
  • the measurement result can be used for the determination of the transmit beam or the receive beam of the first device.
  • the measurement results are not limited to use for beam selection, but can also be used in other aspects. For example, it can be used for data transmission frequency resource selection. When the interference in a certain frequency band is large, the device does not schedule resources of the frequency band for data transmission. For another example, the measurement result may also be used for relay selection. When the interference between the first link and the second link is large, the terminal may directly access the second device. This application does not limit the application of interference measurement.
  • the present application provides a communication device having a function of implementing the behavior of a first device in any of the possible embodiments of the first aspect or the first aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the present application provides a communication device having a function of implementing the behavior of a second device in any of the possible embodiments of the second aspect or the second aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the present application provides a communication apparatus for performing the signal transmission method described in the first aspect.
  • the communication device can include a transmitter and a receiver.
  • a processor and a memory coupled to the processor are also included. among them:
  • the receiver is configured to receive reference signal resource configuration information sent by the second device, where the reference signal is used for interference measurement between the first link and the second link;
  • the transmitter is configured to send the reference signal on a resource indicated by the reference signal resource configuration information, or the receiver is used by the receiver to receive the reference signal; a measurement result corresponding to the reference signal is used for Determining interference between the first link and the second link;
  • the first link is a link between the first device and a fourth device
  • the second link is a link between the second device and a third device
  • the device, the second device is a relay node between the third device and the fourth device, and the link between the second device and the first device is a third link.
  • the memory may be used to store implementation code of the signal transmission method described in the first aspect
  • the processor is configured to execute program code stored in the memory, that is, to perform the method provided by the first aspect, or the first aspect A method provided by any of the possible embodiments.
  • the present application provides a communication apparatus for performing the signal transmission method described in the first aspect.
  • the communication device can include a transmitter and a receiver.
  • a processor and a memory coupled to the processor are also included. among them:
  • the transmitter is configured to send reference signal resource configuration information to the first device; the reference signal is used for interference measurement between the first link and the second link;
  • the receiver is configured to receive the reference signal by the receiver, or the transmitter is configured to send the reference signal on a resource indicated by the reference signal resource configuration information; a measurement result corresponding to the reference signal is used for Determining interference between the first link and the second link;
  • the first link is a link between the first device and a fourth device
  • the second link is a link between the second device and a third device
  • the device, the second device is a relay node between the third device and the fourth device, and the link between the second device and the first device is a third link.
  • the memory may be used to store implementation code of the signal transmission described in the second aspect
  • the processor is configured to execute program code stored in the memory, that is, to perform the method provided by the second aspect, or the second aspect may The method provided by any of the embodiments.
  • a communication system includes: a first device, a second device, a third device, and a fourth device, wherein the first device and the second device are the third device And a relay node between the fourth device, the link between the first device and the fourth device is a first link, and the link between the second device and the third device is a second a link, the link between the second device and the first device is a third link; wherein:
  • the first device receives the reference signal resource configuration information sent by the second device, and sends or receives the reference signal on the resource indicated by the reference signal resource configuration information; the measurement result corresponding to the reference signal Used to determine interference between the first link and the second link.
  • the first device may be the communication device described in the third aspect or the fifth aspect.
  • the second device may be the communication device described in the fourth aspect or the sixth aspect.
  • a computer readable storage medium having instructions thereon, when executed on a computer, causing the computer to perform the signal transmission method described in the first aspect above.
  • a ninth aspect there is provided another computer readable storage medium having instructions stored thereon that, when run on a computer, cause the computer to perform the signal transmission method described in the second aspect above.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the signal transmission method described in the first aspect above.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the signal transmission method described in the second aspect above.
  • FIG. 1A is a schematic diagram of a two-hop relay system according to the present application.
  • FIG. 1B is a schematic diagram of a three-hop relay system according to the present application.
  • FIG. 2 is a schematic diagram of a multi-hop relay system according to the present application.
  • 3A-3B are schematic diagrams of inter-link interference existing in a three-hop relay system
  • 4A-4B are schematic diagrams of two three-hop relays in a multi-hop relay system
  • FIG. 5A is a schematic diagram of a hardware architecture of a relay device according to an embodiment of the present application.
  • FIG. 5B is a schematic diagram of a hardware architecture of a relay device according to another embodiment of the present application.
  • FIG. 6 is a schematic diagram of a hardware architecture of a base station according to an embodiment of the present application.
  • FIGS. 7A-7D are schematic diagrams showing the principles of several schemes for measuring inter-link interference provided by the present application.
  • FIG. 8 is an exemplary schematic diagram of a resource allocation method provided by an embodiment of the present application.
  • FIG. 9 is an exemplary schematic diagram of a resource allocation method provided by another embodiment of the present application.
  • FIG. 10 is an exemplary schematic diagram of a resource allocation method according to still another embodiment of the present application.
  • FIG. 11 is an exemplary schematic diagram of a resource allocation method provided by still another embodiment of the present application.
  • FIG. 12 is a functional block diagram of a wireless communication system, a relay device, and a network device provided by the present application.
  • FIG. 2 shows a wireless communication system to which the present application relates.
  • the wireless communication system may be a Long Term Evolution (LTE) system, or may be a future evolution of the 5th Generation (5G) system, a new air interface (NR) system, and machine-to-machine communication ( Machine to Machine, M2M) system, etc.
  • LTE Long Term Evolution
  • 5G 5th Generation
  • NR new air interface
  • M2M machine-to-machine communication
  • the wireless communication system 100 can include a network device 101, a terminal 105, and a relay device 103.
  • the wireless communication system 100 can be a multi-hop relay system with at least two relay devices 103 between the network device 101 and the terminal 105.
  • the wireless communication system 100 may be the 3-hop relay system shown in FIG. 1B. among them:
  • the network device 101 can be a base station, and the base station can be used for communicating with one or more terminals, and can also be used for communicating with one or more base stations having partial terminal functions (such as a macro base station and a micro base station, such as an access point, Communication between).
  • the base station may be a Base Transceiver Station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, or may be an evolved base station in an LTE system (Evolutional Node B). , eNB), and the base station gNB in the 5G system, the new air interface (NR) system.
  • the base station may also be an Access Point (AP), a TransNode (Trans TRP), a Central Unit (CU), or other network entity, and may include some or all of the functions of the above network entities. .
  • Terminals 105 may be distributed throughout wireless communication system 100, either stationary or mobile.
  • terminal 105 may be a mobile device, a mobile station, a mobile unit, an M2M terminal, a wireless unit, a remote unit, a user agent, a mobile client, and the like.
  • the relay device 103 can be distributed at the edge of the cell, and the coverage of the network device 101 can be expanded.
  • the relay device 103 (also known as a relay node) may contain two physical layer entities. Among them, one entity is used to communicate with its subordinate users (ie, the terminal 105 accessing the relay device 103). Another entity has a user function (ie, a terminal function) for communication by the network device 101.
  • the relay device 103 may be a relay base station, such as a micro base station.
  • the relay device 103 can also be a relay terminal, such as an idle terminal.
  • the relay device 103 may also be a network entity such as a Relay Transceiver Node (TRP), a Customer Premise Equipment (CPE), a relay transceiver, and a relay agent.
  • TRP Relay Transceiver Node
  • CPE Customer Premise Equipment
  • relay transceiver and a relay agent.
  • an access link refers to a wireless link between the relay device 103 and the terminal 105, including an uplink (UL) or a downlink (DL) access link.
  • a backhaul link refers to a radio link between the network device 101 and the relay device 103, including an uplink (UL) or a downlink (DL) backhaul link.
  • a plurality of relay devices 103 between the network device 101 and the terminal 105 can be used to forward wireless signals between the network device 101 and the terminal 105 multiple times.
  • the multiple relay devices 103 are responsible for forwarding the wireless signals transmitted by the network device 101 multiple times, and finally transmitting the wireless signals to the terminal 105. That is, the wireless signal arrives at the terminal 105 after multi-hopping.
  • the plurality of relay devices 103 are responsible for forwarding the wireless signals transmitted by the terminal 105 multiple times, and finally transmitting the wireless signals to the network device 101. That is, the wireless signal arrives at the network device 101 after multi-hopping.
  • the wireless communication system 100 as a 3-hop relay system as an example, the following describes the interference problem between links in the multi-hop relay system.
  • the backhaul link 1 and the access link perform downlink transmission on the same time-frequency resource. It can be understood that, since the signal transmitted by the relay 2 can also be received by the relay 1, the downlink signal sent by the relay 2 on the access link interferes with the downlink signal sent by the relay 1 receiving base station. That is, the downlink transmission of the access link interferes with the downlink transmission of the backhaul link 1.
  • the backhaul link 1 and the access link perform uplink transmission on the same time-frequency resource. It can be understood that, since the signal transmitted by the relay 1 can also be received by the relay 2, the uplink signal sent by the relay 1 on the backhaul link interferes with the uplink signal sent by the relay 2 receiving terminal, that is, The uplink transmission of the backhaul link 1 interferes with the uplink transmission of the access link.
  • Figures 3A-3B are merely illustrative of the application and should not be construed as limiting. It can be seen that in a multi-hop relay system, interference measurement across links is required to ensure correct reception of signals on each link.
  • the downlink signal transmitted by the relay 2 on the backhaul link 3 interferes with the downlink signal transmitted by the relay 1 receiving base station during downlink transmission. That is, the downlink transmission of the backhaul link 3 interferes with the downlink transmission of the backhaul link 1.
  • the downlink signal transmitted by the relay 3 on the access link interferes with the downlink signal transmitted by the relay 2 receiving the relay 1 during downlink transmission. . That is, the downlink transmission of the access link interferes with the downlink transmission of the backhaul link 2.
  • any 3-hop relay can be similarly regarded as a 3-hop relay as shown in FIG. 3A-3B, and analyzed between links. Interference problem. Refer to the subsequent embodiments for how to perform interference measurement across links.
  • the wireless communication system 100 shown in FIG. 2 is only for the purpose of more clearly explaining the technical solutions of the present application, and does not constitute a limitation of the present application.
  • Those skilled in the art may know that with the evolution of the network architecture and new services, The appearance of the scenario, the technical solution provided by the present application is equally applicable to similar technical problems.
  • FIG. 5A illustrates a relay device 300 provided by some embodiments of the present application.
  • the relay device 300 can include a transmitter 305 and a receiver 306.
  • the relay device 300 may further include: one or more processors 301, a memory 302 coupled to the processor 301, a communication interface 303, a transmitter 305, a receiver 306, and a coupling. And antenna.
  • the components shown in FIG. 5A or FIG. 5B may be connected by bus 304 or other types, as exemplified by a bus connection in FIG. 5A or FIG. 5B. among them:
  • Transmitter 305 can be used to perform transmission processing, such as signal modulation, on signals output by processor 301.
  • Receiver 306 can be used to perform reception processing on the wireless signals received by the antenna. For example, signal demodulation.
  • the relay device 300 may be configured with two sets of transceiver devices, wherein one set of transceiver devices is used for links of other communication devices to the relay device 300, and another set of transceiver devices is used for The relay device 300 accesses the links of other communication devices. Taking the relay 2 in FIG. 3A-3B as an example, the relay 2 can be configured with one set of transceivers for accessing the link, and another set of transceivers for the backhaul link 2. As shown in FIG.
  • the two sets of transceiver devices shown may include: a set of transceivers formed by a first transmitter 3051 and a first receiver 3061, and another set of transceivers formed by a second transmitter 3052 and a second receiver 3062.
  • the two sets of transceivers transmit or receive wireless signals through antenna 309 and antenna 310, respectively.
  • the two transceivers can have the same or different transmission and reception characteristics.
  • the corresponding antenna ports of the two transceivers have or do not have Quasi Co-location (QCL) characteristics.
  • QCL Quasi Co-location
  • the relay device 300 may further include two or more sets of transceiver devices.
  • the two or more sets of transceivers can be integrated into one transceiver, which can exhibit different transceiving characteristics through software control.
  • the relay device 300 may also be configured with only one set of transceiver devices. Taking the relay 2 in FIG. 3A-3B as an example, the relay 2 can be configured with only one set of transceivers, which can be used for both the transmission and reception of the access link and the transmission and reception of the backhaul link 2.
  • the examples are merely illustrative of the application and should not be construed as limiting.
  • the communication interface 303 can be used by the relay device 300 to communicate with other communication devices, such as relay devices, terminals, or network devices.
  • the communication interface 303 may be a Long Term Evolution (LTE) (4G) communication interface, a communication interface of a 5G or a future air interface, or a Wireless-Fidelity (Wi-Fi) interface.
  • LTE Long Term Evolution
  • Wi-Fi Wireless-Fidelity
  • Broadband wireless interfaces such as Worldwide Interoperability for Microwave Access (wimax).
  • the relay device 300 may also be configured with a wired communication interface 303 to support wired communication, for example, the backhaul link between the relay device 300 and the network device or other relay device may be a wired communication connection.
  • Memory 302 is coupled to processor 301 for storing various software programs and/or sets of instructions.
  • memory 302 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 302 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as uCOS, VxWorks, or RTLinux.
  • the memory 302 can also store a network communication program that can be used to communicate with one or more relay devices, one or more terminal devices, one or more network devices.
  • the processor 301 can be used to perform two-part logic functions: base station functions and terminal functions.
  • the base station function is used to provide access services for the terminal or other accessed relay devices, and the terminal function is used to send and receive data on the backhaul link.
  • processor 301 can be used to read and execute computer readable instructions.
  • the processor 301 can be used to invoke a program stored in the memory 302, such as an implementation of the signal transmission method provided by one or more embodiments of the present application, and execute the instructions contained in the program.
  • the relay device 300 can be a relay device in the wireless communication system 100 shown in FIG. 2, and can be implemented as a relay base station, a relay terminal, a relay transceiver, and a relay transceiver node (TRP). Following network entities such as agents. It should be noted that the relay device 300 shown in FIG. 5A or FIG. 5B is only one implementation manner of the embodiment of the present application. In an actual application, the relay device 300 may further include more or fewer components, which are not limited herein. .
  • Base station 400 can be a network device with network access capabilities.
  • Base station 400 can be network device 101 in FIG.
  • base station 400 can include one or more processors 401, memory 402, communication interface 403, transmitter 405, receiver 406, coupler 407, and antenna 408. These components can be connected by bus 404 or other means, and FIG. 6 is exemplified by a bus connection. among them:
  • Communication interface 403 can be used by base station 400 to communicate with other communication devices, such as terminals or relay devices.
  • the communication interface 403 communication interface 203 may be a Long Term Evolution (LTE) (4G) communication interface, or may be a 5G or a future communication interface of a new air interface.
  • LTE Long Term Evolution
  • the base station 400 may be configured with a wired communication interface 403 to support wired communication.
  • the backhaul link between one base station 400 and the other base stations 400 may be a wired communication connection.
  • Transmitter 405 can be used to perform transmission processing, such as signal modulation, on signals output by processor 401.
  • Receiver 406 can be used to perform receive processing on the wireless signals received by antenna 408. For example, signal demodulation.
  • transmitter 405 and receiver 406 can be considered a wireless modem.
  • the antenna 408 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line.
  • Coupler 407 can be used to divide the mobile pass signal into multiple channels and distribute it to multiple receivers 406.
  • Memory 402 is coupled to processor 401 for storing various software programs and/or sets of instructions.
  • memory 402 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 402 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as uCOS, VxWorks, or RTLinux.
  • the memory 402 can also store a network communication program that can be used to communicate with one or more relay devices, one or more terminal devices, one or more network devices.
  • the processor 401 can be used to perform wireless channel management, implement call and communication link establishment and teardown, and provide cell handover control and the like for users in the control area.
  • the processor 401 may include: an Administration Module/Communication Module (AM/CM) (a center for voice exchange and information exchange), and a Basic Module (BM) (for completing a call). Processing, signaling processing, radio resource management, radio link management and circuit maintenance functions), code conversion and sub-multiplexer (TCSM) (for multiplexing demultiplexing and code conversion functions) Wait.
  • AM/CM Administration Module/Communication Module
  • BM Basic Module
  • TCSM code conversion and sub-multiplexer
  • processor 401 can be used to read and execute computer readable instructions. Specifically, the processor 401 can be used to invoke a program stored in the memory 402, such as an implementation of the signal transmission method provided by one or more embodiments of the present application, and execute the instructions contained in the program.
  • the base station 400 can be the network device 101 in the wireless communication system 100 shown in FIG. 2, and can be implemented as a base transceiver station, a wireless transceiver, a basic service set (BSS), and an extended service set (ESS). NodeB, eNodeB, access point or TRP, etc.
  • the base station 400 shown in FIG. 6 is only one implementation of the embodiment of the present application. In actual applications, the base station 400 may further include more or less components, which are not limited herein.
  • the embodiment of the present application provides a signal transmission method.
  • the first device and the second device involved in the following method embodiments may be the relay device 300.
  • the first device and the second device involved in the following method embodiments may also be the communication device 500 and the communication device 600 in the subsequent embodiment of FIG. 12, respectively.
  • the first device (or the second device) involved in the following method embodiments may be implemented as a base station having a relay function, may also be implemented as a terminal having a relay function, and may also be implemented as another communication device having a relay function. This application is not limited.
  • the main inventive principle of the present application may include: in the 3-hop relay system shown in FIG. 3A-3B, the relay 1 configures a reference signal resource for the relay 2 of the access relay 1, and the reference signal is used for the access chain. Interference measurement between the road and the backhaul link 1. In this way, the relay 2 can receive or transmit the reference signal on the configured resources to perform interference measurement.
  • the main scheme for performing interference measurement using the reference signal may include:
  • the relay 1 may configure a downlink reference signal (such as a CSI-RS) resource for the relay 2, and the downlink reference signal (such as a CSI-RS) is used for the downlink transmission pair return of the access link. Interference measurement for downlink transmission of link 1.
  • the relay 2 may map the downlink reference signal to the downlink reference signal resource, and then send the downlink reference signal on the access link. Since the relay 1 can also receive the downlink reference signal transmitted by the relay 2 (as shown in FIG. 3A), the relay 1 can measure the interference of the relay 2 to the relay 1, that is, the downlink of the access link. The interference of the downlink transmission of the backhaul link 1 is transmitted.
  • the relay 1 may configure an uplink reference signal (such as an SRS) resource for the relay 2, and the uplink reference signal (such as the SRS) is used for the uplink transmission of the back link 1 to the access link.
  • Interference measurement for uplink transmission The relay 1 transmits the uplink reference signal on the backhaul link 1.
  • the relay 2 can also receive the uplink reference signal transmitted by the relay 1 on the access link according to the uplink reference signal resource (as shown in FIG. 3B). Therefore, the relay 2 can measure the relay 1 pair.
  • the interference following 2 is the interference of the uplink transmission of the back link 1 to the uplink transmission of the access link.
  • the relay 2 may determine, according to the type of the reference signal, the type of interference measurement used by the reference signal. For the foregoing scheme 1 and scheme 2, it can be determined that the downlink reference signal (such as CSI-RS) is used for the interference measurement of the access link to the backhaul link 1, and the uplink reference signal (such as SRS) can be determined for the backhaul. Interference measurement of link 1 to the access link.
  • the downlink reference signal such as CSI-RS
  • SRS uplink reference signal
  • the reference signal on the link between the relay 1 and the relay 2 can also be utilized to measure the interference between the access link and the backhaul link 1.
  • the main options can include:
  • the relay 1 may configure an uplink reference signal (such as SRS) resource for the relay 2, and the uplink reference signal (such as SRS) is used for the downlink transmission of the access link to the backhaul link 1
  • the interference measurement of the downlink transmission can be Specifically, the relay 2 can send the uplink reference signal on the backhaul link 2.
  • the relay 1 can receive the uplink reference signal by using a receiving device corresponding to the backhaul link 1, and perform channel measurement.
  • the measurement result corresponding to the uplink reference signal can be used by the relay 1 to determine the interference of the relay 2 to the relay 1. That is, the interference of the downlink transmission of the access link to the downlink transmission of the backhaul link 1.
  • the premise of the foregoing scheme 3 is that the relay 2 transmitting the reference signal on the backhaul link 2 can be equivalent to the relay 2 transmitting the reference signal on the access link.
  • This premise can be achieved by the relay 2 transmitting the reference signal on the backhaul link 2 and the access link, the antenna port being quasi co-location (QCL), or the relay 2 on the backhaul link 2 and
  • the beams transmitting the reference signals on the access link are the same.
  • a beam as used in the present application refers to a radio wave having a certain direction and shape in a space formed when a wireless signal is transmitted or received by at least one antenna port.
  • the beam may be formed by adjusting the amplitude and/or phase of the wireless signal transmitted or received by the at least one antenna port, or may be formed by other methods, such as adjusting the relevant parameters of the antenna unit.
  • the beams mentioned in the subsequent content can be referred to the explanation herein.
  • the relay 2 since the relay 2 transmits the reference signal on the backhaul link 2, it can be equivalent to the relay 2 transmitting the reference signal on the access link. Therefore, the uplink reference signal received by the relay 1 by using the receiving device corresponding to the backhaul link 1 can be equivalent to the interference generated by the reference signal transmitted by the relay 2 on the access link to the relay 1. That is, the interference of the downlink transmission of the access link to the downlink transmission of the backhaul link 1.
  • the relay 1 may configure a downlink reference signal (such as a CSI-RS) resource for the relay 2, where the downlink reference signal (such as CSI-RS) is used to transmit the uplink transmission pair of the link 1 Interference measurement of uplink transmission of the access link.
  • the relay 1 can transmit the downlink reference signal by using a transmitting device corresponding to the backhaul link 1.
  • the relay 2 receives the uplink reference signal on the backhaul link 2 and performs channel measurement.
  • the measurement result corresponding to the uplink reference signal may be used by the relay 2 to determine the interference of the relay 1 to the relay 2, that is, the interference of the uplink transmission of the backhaul link 1 to the uplink transmission of the access link.
  • the premise of the foregoing scheme 4 is that the relay 2 receiving the reference signal on the backhaul link 2 can be equivalent to the relay 2 receiving the reference signal on the access link.
  • This premise can be achieved by the following: the relay 2 receives the reference signal on the backhaul link 2 and the access link, the antenna port is quasi co-location (QCL), or the relay 2 is on the backhaul link 2 and The beams receiving the reference signals on the access link are the same.
  • QCL quasi co-location
  • the relay 2 since the relay 2 receives the reference signal on the backhaul link 2, it can be equivalent to the relay 2 receiving the reference signal on the access link. Therefore, the downlink reference signal received by the relay 2 can be equivalent to The relay 1 can transmit the interference generated by the downlink reference signal to the relay 2 by using the transmitting device corresponding to the backhaul link 1. That is, the interference of the uplink transmission of the link 1 to the uplink transmission of the access link is returned.
  • the relay 2 has multi-link beam correspondence capability.
  • the multi-link beam correspondence capability of the relay 2 can be summarized as follows: the relay 2 transmits or receives a reference signal of an antenna port having a quasi-co-located QCL relationship on the access link and the backhaul link 2 ability.
  • the multilink beam correspondence capability of the relay 2 can also be summarized as follows: the relay 2 transmits or receives the reference signal on the access link and the backhaul link 2 using the same beam or the same spatial filter.
  • the spatial filter can be at least one of: precoding, weight of the antenna port, phase deflection of the antenna port, and amplitude gain of the antenna port.
  • the access link of the relay 2 is the uplink access link between the relay 2 and the terminal
  • the return link of the relay 2 is the uplink backhaul link between the relay 2 and the relay 2 .
  • the backhaul link and the access link of the relay 2 may correspond to two sets of transceivers respectively. If the transmission and reception characteristics of the two transceivers are the same, the relay 2 (or the relay 1) has the multi-link beam correspondence capability; otherwise, the relay 2 (or the relay 1) does not have the multi-link beam correspondence capability. .
  • the backhaul link and the access link of the relay 2 can share the same set of transceivers. It can be understood that since the backhaul link and the access link of the relay 2 (or the relay 1) share the same set of transceivers, the transmit (or receive) beams of the backhaul link and the access link are the same. , that is, relay 2 (or relay 1) has multi-link beam correspondence capability.
  • the relay 1 may be disregarded whether the relay 1 uses the receiving device or the backhaul link corresponding to the backhaul link 1. 2
  • the corresponding receiving device receives the SRS because the receiving beam of the relay 1 on the backhaul link 1 and the receiving beam of the relay 1 on the backhaul link 2 are identical.
  • the relay 1 has the multi-link beam correspondence capability, it may be disregarded whether the relay 1 uses the transmitting device corresponding to the backhaul link 1 or the backhaul link 2 Corresponding transmitting device to receive CSI-RS
  • the interference measurement type corresponding to the reference signal used for interference measurement between links may include the following two types:
  • the first type of measurement the interference measurement of the downlink transmission of the access link to the downlink transmission of the backhaul link 1, or the measurement of the interference of the access link downlink transmission to the relay 1.
  • the second measurement type the interference measurement of the uplink transmission of the backhaul link 1 to the uplink transmission of the access link, or the measurement of the interference of the uplink transmission of the link 1 uplink to the relay 2.
  • the relay 1 may carry the indication information of the foregoing measurement type in the resource configuration information sent to the relay 2.
  • the reserved field in the existing resource configuration information is extended, and the extended reserved field is used to indicate the above measurement type.
  • the relay 1 may additionally send indication information to the relay 2, where the indication information is used to indicate the above measurement type.
  • the indication information may be referred to as first indication information.
  • the reference signal resource can be associated with the measurement type.
  • a reference signal mapped on a resource characterized by a "resource pattern" (or set) 1 is used for the interference measurement of the first measurement type described above, mapped to a "resource pattern (or set) 2" representation.
  • the reference signal on the resource is used for the interference measurement of the second measurement type described above.
  • the examples are merely illustrative of the application and should not be construed as limiting.
  • the association may be predefined by a protocol or static or semi-static by high-level signaling. Regarding the specific implementation of such association, the application is not limited.
  • the relay 1 may also instruct the relay 2 to transmit a reference signal on the configured resources (refer to FIGS. 7A and 7C) for indicating that the relay 2 performs the access link. Interference measurement of downlink transmission of the downlink transmission of the backhaul link 1. In this way, the relay 2 can transmit the reference signal according to the indication. The relay 1 can receive the reference signal and measure the interference of the relay 2 to the relay 1.
  • the relay 1 may further instruct the relay 2 to receive a reference signal on the configured resources (refer to FIG. 7B and FIG. 7D) to instruct the relay 2 to perform the backhaul. Interference measurement of uplink transmission of link 1 for uplink transmission of the access link. In this way, the relay 2 can receive the reference signal transmitted by the relay 1 according to the indication, and measure the interference of the relay 1 to the relay 2.
  • the foregoing first indication information may also be used to indicate whether the relay 2 sends a reference signal or a reference signal on the configured resource.
  • the information indicating whether the relay 2 transmits the reference signal or receives the reference signal on the configured resource may also be carried in the resource configuration information that the relay 1 sends to the relay 2.
  • the relay 2 may be referred to as a first device
  • the relay 1 may be referred to as a second device
  • the network device eg, a base station
  • the terminal may be referred to as a fourth device.
  • the access link may be referred to as a first link
  • the backhaul link 1 may be referred to as a second link
  • the backhaul link 2 may be referred to as a third link.
  • the main inventive principles described above through the 3-hop relay system illustrated in Figures 3A-3B or Figures 7A-7D are also applicable to more hop relay systems.
  • the above-described main inventive principles can be applied to any 3-hop relay.
  • the third device may be a relay device instead of a network device.
  • the fourth device may be a relay device instead of a terminal.
  • the resource involved in the present application includes at least one of a time-frequency resource or a code domain resource, where the time-frequency resource includes a time domain resource and a frequency domain resource, and is usually a resource element (Resource Element, RE), and a resource block (Resource Block, RB), symbol, subcarrier, and Transmission Time Interval (TTI).
  • RE resource element
  • RB resource block
  • TTI Transmission Time Interval
  • the definitions of resource particles, resource blocks, and the like can be referred to the LTE standard, but are not limited to the LTE standard, and the definitions of various time-frequency resource forms in future communication standards may be different.
  • a code domain resource refers to a sequence code used for code division multiplexing.
  • the Quasi-Co-location (QCL) referred to in this application can be explained as follows:
  • the QCL means that two antenna ports have the same spatial parameter, or that the difference between the spatial parameters of the two antenna ports is less than a certain threshold.
  • the antenna port is an antenna port having different antenna port numbers, and/or an antenna port having the same antenna port number for transmitting or receiving information in different time and/or frequency and/or code domain resources, and/ Or an antenna port having different antenna port numbers for transmitting or receiving information within different time and/or frequency and/or code domain resources.
  • the spatial parameters may include delay spread, Doppler spread, Doppler shift, average delay, average gain, angle of arrival (AOA), average AOA, AOA extension, and angle of departure (angle of Departure).
  • the beam may include at least one of a precoding, a weight sequence number, and a beam sequence number.
  • the angle may be a decomposition value of a different dimension, or a combination of different dimensional decomposition values.
  • the resource identifier includes a Channel State Information Reference Signal (CSI-RS) resource identifier, or an SRS resource identifier, or a resource identifier of a synchronization signal/synchronization signal block, or a resource identifier of a preamble sequence transmitted on the PRACH. Or the resource identifier of the DMRS, which is used to indicate the beam on the resource.
  • CSI-RS Channel State Information Reference Signal
  • the spatial parameters of the other antenna port can be determined according to the parameters of one antenna port.
  • two antenna ports having a QCL relationship may mean that the two antenna ports have the same AOA or AOD when transmitting (or receiving) signals, and are used to indicate that they have the same receive beam or transmit beam.
  • the fact that the two antenna ports are QCLs may refer to the corresponding relationship between AOA and AOD when the two antenna ports transmit (or receive) signals.
  • the fact that the two antenna ports are QCLs may mean that the AOD and the AOA have a corresponding relationship when the two antenna ports transmit (or receive) signals.
  • the two antenna ports have a QCL relationship
  • the two antenna ports have beam correspondence
  • the corresponding beams include at least one of the following: the same receiving beam, the same transmitting beam, a transmitting beam corresponding to the receiving beam, A receive beam corresponding to the transmit beam. That is to say, the beam correspondence can be utilized, the uplink transmission beam is determined according to the downlink reception beam, or the downlink reception beam is determined according to the uplink transmission beam.
  • the same beam may mean that two reference signal antenna ports have a QCL relationship, and different beams may mean that two reference signal antenna ports do not have a QCL relationship.
  • the same beam can also be understood as the same spatial filter.
  • the two antenna ports are in a QCL relationship. It can also be understood that the signals transmitted by the two antenna ports have corresponding or the same beam pair link (BPL), and the corresponding BPL includes at least one of the following: the same downlink BPL.
  • BPL beam pair link
  • FIG. 8 shows a signal transmission method provided by an embodiment of the present application.
  • the first device does not have multi-link beam correspondence capabilities.
  • the first device sends the CSI-RS on the first link according to the CSI-RS resource configured by the second device, corresponding to the scenario shown in FIG. 7A.
  • the CSI-RS is used for interference measurement of downlink transmission of the first link to downlink transmission of the second link.
  • the CSI-RS may be, but is not limited to, a CSI-RS.
  • the first device sends an interference measurement request to the second device, where it is requested to measure the interference of the first device to the second device, that is, request to measure the interference of the downlink transmission of the first link to the downlink transmission of the second link, that is, Request interference measurement for the first measurement type.
  • the interference measurement request may include resource configuration parameters, such as a subcarrier spacing, a quantity of resources, and the like, corresponding to the reference signal used for the interference measurement.
  • the number of resources can be determined by the number of scanning beams. For example, when a resource corresponds to one beam, the number of resources and beams is the same.
  • the second device sends an interference measurement request to the first device, to request to measure interference of the first device to the second device, that is, request to measure interference of downlink transmission of the first link to downlink transmission of the second link.
  • the interference measurement request may include resource configuration parameters, such as a subcarrier spacing, a quantity of resources, and the like, corresponding to the reference signal used for the interference measurement.
  • the number of resources can be determined by the number of scanning beams.
  • the resource requested by S102 may be a downlink zero power resource, such as a downlink CSI-RS zero power resource (Zero-CSI-RS, ZP-CSI-RS) resource.
  • the interference measurement can also be initiated by the second device.
  • the second device may trigger the interference measurement, that is, send the interference measurement request to the third device. That is, S101 is optional.
  • the interference measurement can also be initiated by the third device.
  • the third device may trigger the interference measurement. That is, the S101-S102 is optional, and the third device can directly configure the resource for sending the reference signal for the first device, and can refer to S103.
  • the third device may send the resource configuration information to the second device, where the resource indicated by the resource configuration information may be a downlink zero power resource, for example, a ZP-CSI-RS resource, and reference may be made to S103.
  • the second device may send the resource configuration information to the first device, where the resource indicated by the resource configuration information may be a CSI-RS resource, where the first device sends the CSI-RS on the first link, and may refer to S104.
  • the CSI-RS resource may be a resource allocated by the second device from the downlink zero power resource to the CSI-RS.
  • the CSI-RS resource may include at least one of a time-frequency resource or a code domain resource (a sequence code for code division).
  • the measurement type corresponding to the CSI-RS may be the first measurement type in the following manners:
  • the resource configuration information may further include indication information of the first measurement type.
  • the resource configuration information sent by the third device may include the indication information, where the downlink zero power resource is used to perform interference measurement on the second device by the first device.
  • the resource configuration information sent by the second device may also include the indication information, where the CSI-RS resource is used to indicate that the first device sends the CSI-RS on the first link.
  • the measurement type corresponding to the CSI-RS is also the first measurement type:
  • the indication information may indicate that the CSI-RS resource configured by the second device is used to respond to the interference measurement request in S101-S102.
  • the indication information may be a CSI-RS beam group indication, which is used to indicate that the transmit beam of the CSI-RS is a beam in a downlink beam group of the first link.
  • the indication information may indicate that the CSI-RS is used to measure interference between links.
  • the indication information may indicate that the CSI-RS resource configured by the second device is used by the first device to transmit the CSI-RS.
  • the indication information may indicate that the CSI-RS resource configured by the second device belongs to the resource of the first link.
  • the example is only some embodiments provided by the present application, and the specific meaning of the indication information of the present application is not limited as long as the first measurement type corresponding to the CSI-RS can be explicitly indicated.
  • the second device may send the first indication information to the first device, where the measurement type corresponding to the CSI-RS is the first measurement type, and reference may be made to S105.
  • the measurement type corresponding to the CSI-RS is also the first measurement type:
  • the first indication information may indicate that the CSI-RS resource configured by the second device is used to respond to the interference measurement request in S101-S102.
  • the first indication information may be a CSI-RS beam group indication, which is used to indicate that the transmit beam of the CSI-RS is a beam in an uplink beam group of the third link.
  • the first indication information may indicate that the CSI-RS is used to measure interference between links.
  • the indication information may indicate that the CSI-RS resource configured by the second device is used by the first device to transmit the CSI-RS.
  • the indication information may indicate that the CSI-RS resource configured by the second device belongs to the resource of the first link.
  • the example is only some embodiments provided by the present application. The specific meaning of the first indication information is not limited in this application, as long as the first measurement type corresponding to the CSI-RS can be explicitly indicated.
  • the CSI-RS resource (or ZP-CSI-RS resource) may be the resource associated with the first measurement type.
  • the resources associated with the first measurement type can be predefined by protocol or configured by higher layer signaling.
  • the CSI-RS resource is a resource of the first link
  • the CSI-RS resource is a resource associated with the first measurement type.
  • the examples are merely examples provided by the present application, and may be different in practical applications and should not be construed as limiting.
  • the second device may also instruct the first device to transmit the CSI-RS.
  • the foregoing first indication information is also used to indicate that the first device sends the CSI-RS.
  • the information used to indicate that the first device sends the CSI-RS may also be carried in the resource configuration information that is sent by the second device to the first device.
  • the first device sends a CSI-RS on the resource indicated by the CSI-RS resource configuration information, that is, sends the CSI-RS on the first link. It can be understood that when the first device sends the CSI-RS on the first link, the second device can also receive the CSI-RS (ie, interference) transmitted by the first device, that is, the second device can detect the first device. Interference to the second device.
  • the interference is the interference of the downlink transmission of the first link to the downlink transmission of the second link.
  • the second device measures the interference, and returns a measurement result for the interference to the first device.
  • the implementation of the measurement result may include the following two types:
  • the measurement result may include an identifier of a reference signal resource (or a resource group), such as a resource indicator or a resource set ID.
  • the identifier of a resource (or resource group) may correspond to a transmit beam of a first device.
  • the identifiers of some resources (or resource groups) corresponding to the available beams (or unavailable beams) may be configured by a protocol or statically or semi-statically configured by high layer signaling. That is, the beam that the first device transmits the CSI-RS on the first link has a correspondence with the beam corresponding to the identifier of the resources (or resource groups).
  • the measurement result may include a measurement value corresponding to a resource of each CSI-RS, such as a reference signal reception power (RSRP), and a channel quality indicator (CQI) received signal strength indication.
  • RSRP reference signal reception power
  • CQI channel quality indicator
  • RSSI Received Signal Strength Indication
  • RSSRQ Reference Signal Receive Quality
  • the measurement results are not limited to the above two methods, and the measurement results may be implemented in other manners, and are not limited herein.
  • the first device selects a downlink transmit beam of the first link according to the measurement result. In this way, the first device can select a better downlink transmit beam to prevent the first device from generating interference to the second device.
  • the first device may determine, according to the identifier of the resource (or the resource group) configured by the protocol, whether the CSI-RS beam is available or not, that is, determining the CSI-RS.
  • the signal carried by the resource (or resource group) configured by the protocol has a QCL relationship or no QCL relationship.
  • the manner in which the beam is determined according to the identity of the resource (or resource group) may be specified to be valid in a predefined or base station configured resource.
  • the first device may select the downlink transmit beam of the first link according to the foregoing measurement value.
  • FIG. 9 shows a signal transmission method provided by another embodiment of the present application.
  • the first device has multi-link beam correspondence capabilities.
  • the first device transmits the uplink reference signal on the third link according to the uplink reference signal resource configured by the second device, corresponding to the scenario shown in FIG. 7C.
  • the uplink reference signal is used for interference measurement of downlink transmission of the first link to downlink transmission of the second link.
  • the uplink reference signal can be, but is not limited to, an SRS.
  • SRS SRS
  • the third device may send the resource configuration information to the second device, where the resource indicated by the resource configuration information may be an uplink zero power resource, for example, a ZP-SRS resource, and reference may be made to S203.
  • the second device may send the resource configuration information to the first device, where the resource indicated by the resource configuration information may be an SRS resource, where the first device sends the SRS on the first link, and may refer to S204.
  • the SRS resource may be a resource allocated by the second device from the uplink zero power resource (such as a ZP-SRS resource) for the SRS.
  • the SRS resource may include at least one of a time-frequency resource or a code domain resource (a sequence code for code division).
  • the measurement type corresponding to the SRS may be the first measurement type in the following manners:
  • the resource configuration information may further include indication information of the first measurement type.
  • the resource configuration information sent by the third device may include the indication information, where the downlink zero power resource is used to perform interference measurement on the second device by the first device.
  • the resource configuration information sent by the second device may also include the indication information, where the SRS resource is used to indicate that the first device sends the SRS on the first link.
  • the measurement type corresponding to the SRS may be the first measurement type:
  • the indication information may indicate that the SRS resource configured by the second device is used to respond to the interference measurement request in S201-S202.
  • the indication information may be an SRS beam group indication, which is used to indicate that the transmit beam of the SRS is a beam in an uplink beam group of a third link or a beam in a downlink beam group of the first link.
  • the indication information may indicate that the SRS is used to measure channel state information of a single link, that is, channel state information for measuring a third link.
  • the indication information may indicate that the SRS resource configured by the second device is used by the first device to transmit the SRS.
  • the indication information may indicate that the SRS resource configured by the second device belongs to the resource of the third link.
  • the example is only some embodiments provided by the present application, and the specific meaning of the indication information in the present application is not limited as long as the SRS can be explicitly indicated to correspond to the first measurement type.
  • the second device may send the first indication information to the first device, where the measurement type corresponding to the SRS is the first measurement type. For details, refer to S205.
  • the measurement type corresponding to the SRS may be the first measurement type:
  • the first indication information may indicate that the SRS resource configured by the second device is used to respond to the interference measurement request in S201-S202.
  • the first indication information may be an SRS beam group indication, which is used to indicate that the transmit beam of the SRS is a beam in an uplink beam group of a third link or a beam in a downlink beam group of the first link.
  • the first indication information may indicate that the SRS is used to measure channel state information of a single link, that is, channel state information for measuring a third link.
  • the indication information may indicate that the SRS resource configured by the second device is used by the first device to transmit the SRS.
  • the indication information may indicate that the SRS resource configured by the second device belongs to the resource of the third link.
  • the example is only some embodiments provided by the present application.
  • the specific meaning of the first indication information is not limited in this application, as long as the SRS can be explicitly indicated to correspond to the first measurement type.
  • the SRS resource (or ZP-SRS resource) may be the resource associated with the first measurement type.
  • the resources associated with the second measurement type may be predefined by a protocol or configured by higher layer signaling.
  • the second device may also instruct the first device to transmit the SRS.
  • the first indication information is also used to instruct the first device to send the SRS.
  • the information used to indicate that the first device sends the SRS may also be carried in the resource configuration information sent by the second device to the first device.
  • the first device sends an SRS on the third link.
  • the second device receives the SRS transmitted by the first device.
  • the second device uses the receiving device corresponding to the second link to receive the SRS sent by the first device.
  • the second device may receive the SRS transmitted by the first device by using the receiving device corresponding to the second link, or may receive the first device by using the receiving device corresponding to the third link.
  • the receiving device corresponding to the first link and the receiving device corresponding to the second link may be the same (or the same) receiving device.
  • the first device transmitting the reference signal on the third link may be equivalent to the first device transmitting the reference signal on the first link. Therefore, the SRS received by the second device may be equivalent to the interference generated by the first device when the reference signal is transmitted on the first link.
  • the interference is the interference of the downlink transmission of the first link to the downlink transmission of the second link.
  • the second device measures the interference and returns the measurement result to the first device.
  • the first device selects a downlink transmit beam of the first link according to the measurement result. In this way, the first device can select a better downlink transmit beam to prevent the first device from generating interference to the second device.
  • FIG. 10 shows a signal transmission method provided by still another embodiment of the present application.
  • the first device does not have multi-link beam correspondence capabilities.
  • the first device receives the uplink reference signal according to the uplink reference signal resource configured by the second device, corresponding to the scenario shown in FIG. 7B.
  • the uplink reference signal is used for interference measurement of uplink transmission of the second link to uplink transmission of the first link.
  • the uplink reference signal can be, but is not limited to, an SRS.
  • SRS SRS
  • the interference measurement request is used to request to measure the interference of the second device to the first device, that is, request to measure the interference of the uplink transmission of the second link to the uplink transmission of the first link, that is, request the second measurement type. Interference measurement.
  • S301-S302 reference may be made to S101-S103 in the embodiment of FIG. 8, which is not described herein.
  • the third device may send the resource configuration information to the second device, where the resource indicated by the resource configuration information may be a downlink zero-power resource, for example, a ZP-SRS resource, and reference may be made to S303.
  • the second device may send the resource configuration information to the first device, where the resource indicated by the resource configuration information may be an SRS resource, where the first device receives the SRS transmitted by the second device, and may refer to S304.
  • the SRS resource may be a resource allocated by the second device from the downlink zero power resource for the SRS resource.
  • the SRS resource may include at least one of a time-frequency resource or a code domain resource (a sequence code for code division).
  • the measurement type corresponding to the SRS may be the second measurement type in the following manners:
  • the resource configuration information may further include indication information of a second measurement type.
  • the resource configuration information sent by the third device may include the indication information, where the downlink zero power resource is used to perform interference measurement on the first device by the second device.
  • the resource configuration information sent by the second device may also include the indication information, where the SRS resource is used to receive the SRS by the second device.
  • the measurement type corresponding to the SRS may be the second measurement type:
  • the indication information may indicate that the SRS resource configured by the second device is used to respond to the interference measurement request in S301-S302.
  • the indication information may be an SRS beam group indication, which is used to indicate that the receiving beam of the SRS is a beam in an uplink beam group of the first link.
  • the indication information can indicate that the SRS is used to measure interference between links.
  • the indication information may indicate that the SRS resource configured by the second device is used by the second device to transmit the SRS.
  • the indication information may indicate that the SRS resource configured by the second device belongs to the resource of the second link.
  • the example is only some embodiments provided by the present application, and the specific meaning of the indication information of the present application is not limited, as long as the SRS can be explicitly indicated to correspond to the second measurement type.
  • the second device may send the first indication information to the first device, where the measurement type corresponding to the SRS is the first measurement type, and reference may be made to S305.
  • the measurement type corresponding to the SRS may be the second measurement type:
  • the first indication information may indicate that the SRS resource configured by the second device is used to respond to the interference measurement request in S101-S102.
  • the first indication information may be an SRS beam group indication, which is used to indicate that the receiving beam of the SRS is a beam in an uplink beam group of the first link.
  • the indication information can indicate that the SRS is used to measure interference between links.
  • the indication information may indicate that the SRS resource configured by the second device is used by the second device to transmit the SRS.
  • the indication information may indicate that the SRS resource configured by the second device belongs to the resource of the second link.
  • the example is only some embodiments provided by the present application. The specific meaning of the first indication information is not limited in this application, as long as the SRS can be explicitly indicated to correspond to the second measurement type.
  • the SRS resource (or ZP-SRS resource) may be a resource associated with the second measurement type.
  • the resources associated with the second measurement type may be predefined by a protocol or configured by higher layer signaling.
  • the second device may also instruct the first device to receive the SRS.
  • the first indication information is also used to indicate that the first device receives the SRS.
  • the information used to indicate that the first device receives the SRS may also be carried in the resource configuration information that is sent by the second device to the first device.
  • the second device sends an SRS on the second link. It can be understood that when the first device sends the SRS on the second link, the first device can also receive the SRS (ie, interference) transmitted by the second device, that is, the first device can detect the second device to the first device.
  • the interference generated.
  • the interference is the interference of the uplink transmission of the second link to the uplink transmission of the first link.
  • the first device measures the interference, and returns a measurement result for the interference to the second device.
  • the first device selects an uplink receiving beam of the first link according to the measurement result. In this way, the first device can select a better uplink receiving beam to prevent the second device from causing interference to the first device.
  • FIG. 11 shows a signal transmission method provided by still another embodiment of the present application.
  • the first device has multi-link beam correspondence capabilities.
  • the first device receives the downlink reference signal according to the downlink reference signal resource configured by the second device, corresponding to the scenario shown in FIG. 7D.
  • the downlink reference signal is used for interference measurement of uplink transmission of the second link to uplink transmission of the first link.
  • the downlink reference signal may be, but is not limited to, a CSI-RS.
  • the third device may send the resource configuration information to the second device, where the resource indicated by the resource configuration information may be an uplink zero-power resource, for example, a ZP-CSI-RS resource, and reference may be made to S403.
  • the second device may send the resource configuration information to the first device, where the resource indicated by the resource configuration information may be a CSI-RS resource, where the first device receives the CSI-RS on the third link, and may refer to S404.
  • the CSI-RS resource may be a resource allocated by the second device from the uplink zero power resource (such as a ZP-CSI-RS resource) for the CSI-RS.
  • the CSI-RS resource may include at least one of a time-frequency resource or a code domain resource (a sequence code for code division).
  • the measurement type corresponding to the CSI-RS may be the second measurement type in the following manners:
  • the resource configuration information may further include indication information of a second measurement type.
  • the resource configuration information sent by the third device may include the indication information, where the downlink zero power resource is used to perform interference measurement on the first device by the second device.
  • the resource configuration information sent by the second device may also include the indication information, where the CSI-RS resource is used to indicate that the first device receives the CSI-RS on the third link.
  • the measurement type corresponding to the CSI-RS is also the second measurement type:
  • the indication information may indicate that the CSI-RS resource configured by the second device is used to respond to the interference measurement request in S401-S402.
  • the indication information may be a CSI-RS beam group indication, which is used to indicate that the receiving beam of the CSI-RS is a beam in a downlink beam group of the third link or a beam in an uplink beam group of the first link.
  • the indication information may indicate that the CSI-RS is used to measure channel state information of a single link, that is, channel state information for measuring a third link.
  • the indication information may indicate that the CSI-RS resource configured by the second device is used by the second device to transmit the CSI-RS.
  • the indication information may indicate that the CSI-RS resource configured by the second device belongs to the resource of the third link.
  • the example is only some embodiments provided by the present application, and the specific meaning of the indication information in the present application is not limited as long as the CSI-RS can be explicitly indicated to correspond to the second measurement type.
  • the second device may send the first indication information to the first device, where the measurement type corresponding to the CSI-RS is the second measurement type. For details, refer to S405.
  • the measurement type corresponding to the CSI-RS is also the second measurement type:
  • the indication information may indicate that the CSI-RS resource configured by the second device is used to respond to the interference measurement request in S401-S402.
  • the indication information may be a CSI-RS beam group indication, which is used to indicate that the receiving beam of the CSI-RS is a beam in a downlink beam group of the third link or a beam in an uplink beam group of the first link.
  • the indication information may indicate that the CSI-RS is used to measure channel state information of a single link, that is, channel state information for measuring a third link.
  • the indication information may indicate that the CSI-RS resource configured by the second device is used by the second device to transmit the CSI-RS.
  • the indication information may indicate that the CSI-RS resource configured by the second device belongs to the resource of the third link.
  • the example is only some embodiments provided by the present application.
  • the specific meaning of the first indication information is not limited in this application, as long as the CSI-RS can be explicitly indicated to correspond to the second measurement type.
  • the CSI-RS resource (or ZP-CSI-RS resource) may be a resource associated with the second measurement type.
  • the resources associated with the second measurement type may be predefined by a protocol or configured by higher layer signaling.
  • the second device may also instruct the first device to receive the CSI-RS.
  • the first indication information is also used to indicate that the first device receives the CSI-RS.
  • the information used to indicate that the first device receives the CSI-RS may also be carried in the resource configuration information that is sent by the second device to the first device.
  • the second device sends the CSI-RS on the third link.
  • the first device receives the CSI-RS sent by the second device.
  • the second device transmits the CSI-RS by using the transmitting device corresponding to the second link.
  • the second device may use the transmitting device corresponding to the second link to send the CSI-RS, and may also use the transmitting device corresponding to the third link to send the CSI-RS.
  • the transmitting device corresponding to the second link and the transmitting device corresponding to the third link may be the same (or the same) transmitting device.
  • the first device receiving the reference signal on the third link may be equivalent to the first device receiving the reference signal on the first link. Therefore, the CSI-RS received by the first device may be equivalent to the interference generated by the second device when the second device sends the reference signal.
  • the interference is the interference of the downlink transmission of the first link to the downlink transmission of the second link.
  • the second device measures the interference and returns the measurement result to the first device.
  • the first device selects an uplink transmit beam of the first link according to the measurement result. In this way, the first device can select a better uplink receiving beam to prevent the second device from causing interference to the first device.
  • the first device may send the first report information to the second device, for reporting whether the first device has multi-link beam correspondence capability.
  • the second device may further report, to the third device, whether the first device has multi-link beam correspondence capability.
  • the multi-link beam correspondence capability is reported to the second device by the first device, so that the second device determines whether the interference measurement method is adopted according to whether the first device has the beam correspondence capability.
  • the second device may determine whether the first device has a beam correspondence capability and adopt a solution corresponding to the above embodiment.
  • the second device may configure the first device to send the downlink reference signal (such as CSI-RS) on the first link.
  • the downlink reference signal such as CSI-RS
  • the second device may configure the first device to send an uplink reference signal (such as SRS) on the third link, which may be referred to the FIG.
  • the second device may also configure the first device to send a downlink reference signal (such as a CSI-RS) on the first link, which may be referred to the FIG. 8 embodiment.
  • the second device may configure the first device to receive the uplink reference signal (such as SRS), which may be referred to the embodiment of FIG. .
  • the uplink reference signal such as SRS
  • the second device may configure the first device to receive the downlink reference signal (such as CSI-RS) on the third link, and may refer to the FIG. 11 embodiment.
  • the second device may also configure the first device to receive an uplink reference signal (such as an SRS), which may be referred to the FIG. 10 embodiment.
  • the measurement result is not limited to use for beam selection, and may be used in other aspects as well.
  • it can be used for data transmission frequency resource selection.
  • the measurement result may also be used for relay selection.
  • the terminal may directly access the second device. This application does not limit the application of interference measurement.
  • FIG. 12 illustrates a wireless communication system and associated communication device.
  • the wireless communication system 10 includes a communication device 500 and a communication device 600.
  • the wireless communication system 10 can be the wireless communication system 100 shown in FIG.
  • the communication device 500 and the communication device 600 are both relay nodes, and both of them may be the relay device 103 in the wireless communication system 100 shown in FIG. 2 .
  • the communication device 500 (or the communication device 600) may be a network device having a relay function or a terminal having a relay function.
  • the communication device 500 may be the relay 2
  • the communication device 600 may be the relay 1, between the communication device 500 and the terminal (or another relay device).
  • the link may be referred to as a first link, and the link between the communication device 600 and a base station (or another relay device) may be referred to as a second link.
  • the link between the communication device 500 and the communication device 600 may be referred to as a third link.
  • the communication device 500 can be the relay device 300 in the embodiment of FIG. 5A or FIG. 5B, and the communication device 600 can be the base station 400 in the embodiment of FIG.
  • Functional units included in each of the communication device 500 and the communication device 600 are separately described below.
  • the communication device 500 may include a first communication unit 401 and a second communication unit 403. among them:
  • the first communication unit 401 is configured to receive reference signal resource configuration information sent by the communication device 600.
  • the reference signal resource configuration information is usable for interference measurement between the first link and the second link.
  • the second communication unit 403 is configured to send or receive a reference signal on the resource indicated by the reference signal resource configuration information.
  • the second communication unit 403 is responsible for transmitting or receiving the reference signal
  • the first communication unit 401 is responsible for receiving some configuration information (such as resource configuration information) sent by the communication device 600 or reporting the multi-link beam corresponding to the communication device 600.
  • Some configuration information such as resource configuration information
  • the communication device 600 may include a first communication unit 501 and a second communication unit 503. among them:
  • the first communication unit 501 can be configured to transmit reference signal resource configuration information to the communication device 500.
  • the reference signal resource configuration information is usable for interference measurement between the first link and the second link.
  • the second communication unit 503 is operable to transmit or receive a reference signal on a resource indicated by the resource configuration information.
  • the second communication unit 403 is responsible for transmitting or receiving the reference signal
  • the first communication unit 401 is responsible for transmitting some configuration information (such as resource configuration information) to the communication device 500 or receiving the multi-link beam corresponding to the communication device 500.
  • Some configuration information such as resource configuration information
  • implementing the technical solution provided by the present application can measure interference between links in a multi-hop relay system, and thus can avoid such interference by means of beam selection and the like.
  • the network device chip when the embodiment of the present application is applied to a network device chip (or a terminal chip), the network device chip (or terminal chip) can implement the function of the first device device in the foregoing method embodiment. At this time, the network device chip (or terminal chip) receives the reference signal resource configuration information from other modules (such as a radio frequency module or an antenna) in the network device (or terminal).
  • the network device chip receives the reference signal resource configuration information from other modules (such as a radio frequency module or an antenna) in the network device (or terminal).
  • the network device chip (or the terminal chip) can also implement the function of the second device device in the foregoing method embodiment.
  • the network device chip transmits the reference signal resource configuration information to other modules (such as a radio frequency module or an antenna) in the network device (or terminal).
  • the communication device in the embodiment of the present application may be a network device, a terminal device, or a chip system.
  • the chip system includes at least one chip, and may also include other discrete devices.
  • the chip system can be applied to a network device or a terminal device to support the network device or the terminal device to complete the method provided in the embodiment of the present application.
  • the program can be stored in a computer readable storage medium, when the program is executed
  • the flow of the method embodiments as described above may be included.
  • the foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.

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Abstract

本申请公开了一种信号传输方法，所述方法可包括：第一设备接收第二设备发送的参考信号资源配置信息，所述参考信号用于第一链路和第二链路之间的干扰测量，其中，所述第一链路为所述第一设备与第四设备之间的链路，所述第二链路为所述第二设备与第三设备之间的链路，所述第一设备和所述第二设备是所述第三设备和所述第四设备之间的中继节点；所述第一设备在所述参考信号资源配置信息指示的参考信号资源上发送或接收参考信号。上述方案可实现在多跳中继系统中测量出链路之间的干扰，进而可以通过波束选择等措施避免这种干扰。

Description

信号传输方法、相关装置及系统 技术领域
本申请涉及无线通信技术领域，尤其涉及信号传输方法、相关装置及系统。
背景技术
为了提升基站的覆盖，LTE/LTE-A系统支持中继传输。在中继系统中，存在基站、中继、终端三类节点。如图1A所示，基站和中继之间的链路为回传链路(backhaul link，BH)，中继和终端之间的链路为接入链路(access link，AC)。在LTE系统中，考虑到与早期系统的用户的兼容性问题，中继的存在对用户不可见，因此，AC链路的设计直接复用LTE的单跳链路设计。
为了实现更广覆盖，中继系统可以是多跳中继系统。多跳中继系统可能存在多个回传链路和一个接入链路。例如，图1B所示的3跳中继系统包括2个中继节点，基站和中继1之间的链路为回传链路1，中继1和中继2之间的链路为回传链路2，中继2和终端之间的链路为接入链路。
在新空口(new radio，NR)通信系统中，引入了波束管理技术，分为上行波束管理和下行波束管理。在指示具体使用哪一个(些)波束前，需要进行信道质量或波束质量的测量。在新空口通信系统中，为了进行信道质量测量，基站会配置用户在信道状态信息参考信号(channel state information reference signal，CSI-RS)资源上测量CSI-RS，从而获取信道质量。为了让终端测量干扰，基站会配置终端在零功率的CSI-RS(zero power CSI-RS，ZP-CSI-RS)上测量干扰噪声的强度。
但是，在当前系统框架下，基站仅控制或指示基站到终端间的传输。而且，在现有的多跳中继系统中，由于每个设备仅能控制接入该设备的其他设备，因此无法控制其他链路的传输，从而无法进行跨链路的干扰测量。
发明内容
本申请提供了信号传输方法、相关装置及系统，可实现在多跳中继系统中测量出链路之间的干扰，进而可以通过波束选择等措施避免这种干扰。
第一方面，本申请提供了一种信号传输方法，应用在第一设备侧，该方法包括：第一设备接收第二设备发送的参考信号资源配置信息，然后在所述参考信号资源配置信息指示的参考信号资源上发送或接收参考信号。
第二方面，本申请提供了一种信号传输方法，应用在第二设备侧，该方法包括：第二设备向第一设备发送参考信号资源配置信息，在所述参考信号资源配置信息指示的资源上发送或接收参考信号。
结合第一方面和第二方面，所述参考信号用于第一链路和第二链路之间的干扰测量，其中，所述第一链路为所述第一设备与第四设备之间的链路，所述第二链路为所述第二设备与第三设备之间的链路，所述第一设备和所述第二设备是所述第三设备和所述第四设备之间的中继节点。
实施第一方面和第二方面描述的方法，可实现在多跳中继系统中测量出链路之间的干扰，进而可以通过波束选择等措施避免这种干扰。
结合第一方面或第二方面，利用参考信号进行干扰测量的主要方案可包括：
方案一，第二设备可以为第一设备配置的干扰测量。
另外，还可以利用第二设备与第一设备之间的链路(即第三链路)上的参考信号来测量第一链路和第二链路之间的干扰。主要方案可包括：
方案三，第二设备可以为第一设备配置上行参考信号(如SRS)资源，该上行参考信号(如SRS)用于第一链路的下行传输对第二链路的下行传输的干扰测量。具体的，第一设备可以在第三链路上发送该上行参考信号。第二设备可以利用第二链路对应的接收装置接收该上行参考信号，并进行信道测量。该上行参考信号对应的测量结果可用于第二设备确定第一设备对第二设备的干扰。即第一链路的下行传输对第二链路的下行传输的干扰。
上述方案三的前提是：第一设备在第三链路上发送参考信号可等效于第一设备在第一链路上发送参考信号。这个前提可通过下述方式实现：第一设备在第三链路和第一链路上发送参考信号的天线端口是准共址(QCL)的，或者第一设备在第三链路和第一链路上发送参考信号的波束是相同的。
可以理解的，由于第一设备在第三链路上发送参考信号可等效于第一设备在第一链路上发送参考信号。因此，第二设备利用第二链路对应的接收装置接收的该上行参考信号可等效于第一设备在第一链路上发送的参考信号对第二设备产生的干扰。即第一链路的下行传输对第二链路的下行传输的干扰。
方案四，第二设备可以为第一设备配置下行参考信号(如CSI-RS)资源，该下行参考信号(如CSI-RS)用于第二链路的上行传输对第一链路的上行传输的干扰测量。第二设备可以利用第二链路对应的发射装置发送该下行参考信号。第一设备在第三链路上接收该上行参考信号，并进行信道测量。该上行参考信号对应的测量结果可用于第一设备确定第二设备对第一设备的干扰，即第二链路的上行传输对第一链路的上行传输的干扰。
上述方案四的前提是：第一设备在第三链路上接收参考信号可等效于第一设备在第一链路上接收参考信号。这个前提可通过下述方式实现：第一设备在第三链路和第一链路上接收参考信号的天线端口是准共址(QCL)的，或者第一设备在第三链路和第一链路上接收参考信号的波束是相同的。
可以理解的，由于第一设备在第三链路上接收参考信号可等效于第一设备在第一链路上接收参考信号，因此，第一设备接收的该下行参考信号可等效于第二设备可以利用第二链路对应的发射装置发送该下行参考信号对第一设备产生的干扰。即第二链路的上行传输对第一链路的上行传输的干扰。
在上述方案三和方案四中，第一设备具有多链路波束对应性能力。本申请中，第一设备的多链路波束对应性能力可概括为：所述第一设备在所述第一链路和第三链路上发送或接收具有准共址QCL关系的天线端口的参考信号的能力。第一设备的多链路波束对应性能力还可以概括为：所述第一设备在所述第一链路和第三链路上使用相同的波束或相同的空间滤波器发送或接收参考信号的能力。空间滤波器可以为以下至少之一：预编码，天线端口的权值，天线端口的相位偏转，天线端口的幅度增益。这里，第一设备的第一链路即第 一设备和终端之间的上行第一链路，第一设备的回传链路即第一设备和第二设备之间的上行第三链路。
综合上述四种方案，用于链路间的干扰测量的参考信号对应的干扰测量类型可包括以下两种：
第一种测量类型，所述接入链路的下行传输对所述回传链路1的下行传输的干扰测量，或接入链路下行传输对中继1的干扰的测量。
第二种测量类型，所述回传链路1的上行传输对所述接入链路的上行传输的干扰测量，或回传链路1上行传输对中继2的干扰的测量。
结合第一方面或第二方面，在一些实施例中，可以通过下述几种方式来指示上述参考信号对应的测量类型：
第一种方式，中继1可以在发送给中继2的资源配置信息中携带上述测量类型的指示信息。例如，对现有的资源配置信息中的预留字段进行扩展，利用扩展的预留字段来指示上述测量类型。示例仅仅是本申请提供的一种示例，不应构成限定。
第二种方式，中继1可以另外向中继2发送指示信息，该指示信息用于指示上述测量类型。本申请中，该指示信息可称为第一指示信息。
第三种方式，参考信号资源可以关联测量类型。例如，映射在“资源图样(pattern)(或集合)1”表征的资源上的参考信号用于上述第一种测量类型的干扰测量，映射在“资源图样(pattern)(或集合)2”表征的资源上的参考信号用于上述第二种测量类型的干扰测量。示例仅仅用于解释本申请，不应构成限定。具体的，这种关联可以通过协议预定义，也可通过高层信令静态或半静态的配置。关于这种关联的具体实现，本申请不作限制。
结合第一方面或第二方面，在一些实施例中，第一设备可以向第二设备发送第一上报信息，用于上报第一设备是否具备多链路波束对应性能力。可选的，第二设备还可以向第三设备继续上报第一设备是否具备多链路波束对应性能力。关于波束对应性的说明可参考发明原理部分，这里不再赘述。
通过第一设备向第二设备上报多链路波束对应性能力，可以使得第二设备根据第一设备是否具有波束对应性能力来确定采用哪一种干扰测量方法。具体的，第二设备可以第一设备是否具有波束对应性能力确定采用上面哪个实施例对应的方案。具体可如下：
当参考信号用于第一种测量类型的干扰测量时，如果第一设备不具有波束对应性能力，则第二设备可以配置第一设备在第一链路上发送下行参考信号(如CSI-RS)，可参考上述方案一。如果第一设备具有波束对应性能力，则第二设备可以配置第一设备在第三链路上发送上行参考信号(如SRS)，可参考上述方案三。可选的，如果第一设备具有波束对应性能力，则第二设备也可以配置第一设备在第一链路上发送下行参考信号(如CSI-RS)，可参考上述方案一。
当参考信号用于第二种测量类型的干扰测量时，如果第一设备不具有波束对应性能力，则第二设备可以配置第一设备接收上行参考信号(如SRS)，可参考上述方案二。如果第一设备具有波束对应性能力，则第二设备可以配置第一设备在第三链路上接收下行参考信号(如CSI-RS)，可参考上述方案二，可参考上述方案四。可选的，如果第一设备具有波束对应性能力，则第二设备也可以配置第一设备接收上行参考信号(如SRS)，可参考上述方案 二。
结合第一方面或第二方面，在一些实施例中，在利用参考信号测量得到链路间的干扰之后，测量结果可用于第一设备的发送波束或接收波束的确定。测量结果不限于用于进行波束选择，还可以用于其他方面。例如可用于数据传输频率资源的选择，当某个频带范围内的干扰较大时，设备不调度该频带的资源用于数据传输。又例如，测量结果还可用于中继选择，当第一链路和第二链路间干扰较大时，终端可以直接接入第二设备。本申请对干扰测量的应用不作限制。
第三方面，本申请提供了一种通信装置，该通信装置具有实现上述第一方面或第一方面任一种可能的实施方式中第一设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
第四方面，本申请提供了一种通信装置，该通信装置具有实现上述第二方面或第二方面任一种可能的实施方式中第二设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
第五方面，本申请提供了一种通信装置，用于执行第一方面描述的信号传输方法。所述通信装置可包括：发送器、接收器。可选的，还可包括处理器以及与所述处理器耦合的存储器。其中：
所述接收器用于接收第二设备发送的参考信号资源配置信息；所述参考信号用于第一链路和第二链路之间的干扰测量；
所述发送器用于在所述参考信号资源配置信息指示的资源上发送所述参考信号，或者所述接收器用于所述接收器用于接收所述参考信号；所述参考信号对应的测量结果用于确定所述第一链路和所述第二链路之间的干扰；
其中，所述第一链路为所述第一设备与第四设备之间的链路，所述第二链路为所述第二设备与第三设备之间的链路；所述第一设备、所述第二设备是所述第三设备和所述第四设备之间的中继节点，所述第二设备与所述第一设备之间的链路为第三链路。
具体的，所述存储器可用于存储第一方面描述的信号传输方法的实现代码，所述处理器用于执行所述存储器中存储的程序代码，即执行第一方面所提供的方法，或者第一方面可能的实施方式中的任意一种所提供的方法。
第六方面，本申请提供了一种通信装置，用于执行第一方面描述的信号传输方法。所述通信装置可包括：发送器、接收器。可选的，还可包括处理器以及与所述处理器耦合的存储器。其中：
所述发送器用于向第一设备发送参考信号资源配置信息；所述参考信号用于第一链路和第二链路之间的干扰测量；
所述接收器用于所述接收器用于接收所述参考信号，或者所述发送器用于在所述参考信号资源配置信息指示的资源上发送所述参考信号；所述参考信号对应的测量结果用于确定所述第一链路和所述第二链路之间的干扰；
其中，所述第一链路为所述第一设备与第四设备之间的链路，所述第二链路为所述第二设备与第三设备之间的链路；所述第一设备、所述第二设备是所述第三设备和所述第四设备之间的中继节点，所述第二设备与所述第一设备之间的链路为第三链路。
具体的，所述存储器可用于存储第二方面描述的信号传输的实现代码，所述处理器用于执行所述存储器中存储的程序代码，即执行第二方面所提供的方法，或者第二方面可能的实施方式中的任意一种所提供的方法。
第七方面，提供了一种通信系统，所述通信系统包括：第一设备、第二设备、第三设备和第四设备，所述第一设备、所述第二设备是所述第三设备和所述第四设备之间的中继节点，所述第一设备与第四设备之间的链路为第一链路，所述第二设备与第三设备之间的链路为第二链路，所述第二设备与所述第一设备之间的链路为第三链路；其中：
所述第二设备向所述第一设备发送参考信号资源配置信息，所述参考信号用于第一链路和第二链路之间的干扰测量；
所述第一设备接收所述第二设备发送的所述参考信号资源配置信息，并在所述参考信号资源配置信息指示的资源上发送或接收所述参考信号；所述参考信号对应的测量结果用于确定所述第一链路和所述第二链路之间的干扰。
具体的，所述第一设备可以是第三方面或第五方面描述的通信装置。所述第二设备可以是第四方面或第六方面描述的通信装置。
第八方面，提供了一种计算机可读存储介质，所述可读存储介质上存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面描述的信号传输方法。
第九方面，提供了另一种计算机可读存储介质，所述可读存储介质上存储有指令，当其在计算机上运行时，使得计算机执行上述第二方面描述的信号传输方法。
第十方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面描述的信号传输方法。
第十一方面，提供了另一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第二方面描述的信号传输方法。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1A是本申请涉及的一种两跳中继系统的示意图；
图1B是本申请涉及的一种三跳中继系统的示意图；
图2是本申请涉及的多跳中继系统的示意图；
图3A-3B是三跳中继系统中存在的链路间干扰的示意图；
图4A-4B是多跳中继系统中的两种三跳中继的示意图；
图5A是本申请的一个实施例提供的中继装置的硬件架构示意图；
图5B是本申请的另一个实施例提供的中继装置的硬件架构示意图；
图6是本申请的一个实施例提供的基站的硬件架构示意图；
图7A-7D是本申请提供的测量链路间干扰的几种方案的原理示意图；
图8是本申请的一个实施例提供的资源分配方法的示例性示意图；
图9是本申请的另一个实施例提供的资源分配方法的示例性示意图；
图10是本申请的再一个实施例提供的资源分配方法的示例性示意图；
图11是本申请的再一个实施例提供的资源分配方法的示例性示意图；
图12是本申请的提供的无线通信系统，中继装置和网络设备的功能框图。
具体实施方式
本申请的实施方式部分使用的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请。
图2示出了本申请涉及的无线通信系统。所述无线通信系统可以是长期演进(Long Term Evolution，LTE)系统，也可以是未来演进的第五代移动通信(the 5th Generation，5G)系统、新空口(NR)系统，机器与机器通信(Machine to Machine，M2M)系统等。如图2所示，无线通信系统100可包括：网络设备101，终端105，以及中继设备103。无线通信系统100可以是多跳中继系统，网络设备101和终端105之间至少有两个中继设备103。可选的，无线通信系统100可以是图1B所示的3跳中继系统。其中：
网络设备101可以为基站，基站可以用于与一个或多个终端进行通信，也可以用于与一个或多个具有部分终端功能的基站进行通信(比如宏基站与微基站，如接入点，之间的通信)。基站可以是时分同步码分多址(Time Division Synchronous Code Division Multiple Access，TD-SCDMA)系统中的基站收发台(Base Transceiver Station，BTS)，也可以是LTE系统中的演进型基站(Evolutional Node B，eNB)，以及5G系统、新空口(NR)系统中的基站gNB。另外，基站也可以为接入点(Access Point，AP)、传输节点(Trans TRP)、中心单元(Central Unit，CU)或其他网络实体，并且可以包括以上网络实体的功能中的一些或所有功能。
终端105可以分布在整个无线通信系统100中，可以是静止的，也可以是移动的。在本申请的一些实施例中，终端105可以是移动设备、移动台(mobile station)、移动单元(mobile unit)、M2M终端、无线单元，远程单元、用户代理、移动客户端等等。
中继设备103可以分布在小区边缘，可扩大网络设备101的覆盖范围。中继设备103(又称为中继节点)可以包含两个物理层实体。其中，一个实体用于和其下属用户(即接入到中继设备103的终端105)通信。另一个实体具有用户功能(即终端功能)，用于网络设备101通信。具体实现中，中继设备103可以是中继基站，例如微基站等。中继设备103也可以是中继终端，例如空闲终端。中继设备103还可以是中继收发节点(TRP)，用户终端设备(Customer Premise Equipment，CPE)，中继收发器、中继代理等网络实体。
在无线通信系统100中，接入链路(access link)是指中继设备103与终端105之间的无线链路，包括上行(Uplink，UL)或下行(Downlink，DL)接入链路。回传链路(backhaul link)是指网络设备101与中继设备103之间的无线链路，包括上行(Uplink，UL)或下行(Downlink，DL)回传链路。
在无线通信系统100中，网络设备101和终端105之间的多个中继设备103可用于对网络设备101和终端105之间的无线信号进行多次转发。具体的，在下行传输时，这多个中继设备103负责对网络设备101发射的无线信号进行多次转发，最终传输该无线信号至终端105。即该无线信号经过多跳才到达终端105。在上行传输时，这多个中继设备103负责对终端105发射的无线信号进行多次转发，最终传输该无线信号至网络设备101。即该无线 信号经过多跳才到达网络设备101。
以无线通信系统100是3跳中继系统为例，下面说明多跳中继系统中链路之间的干扰问题。
如图3A所示，在3跳中继系统中，回传链路1和接入链路在相同的时频资源上进行下行传输。可以理解的，由于中继2发射的信号同样可以被中继1接收到，因此，中继2在接入链路上发送的下行信号会对中继1接收基站发送的下行信号产生干扰。即接入链路的下行传输会对回传链路1的下行传输产生干扰。
如图3B所示，在3跳中继系统中，回传链路1和接入链路在相同的时频资源上进行上行传输。可以理解的，由于中继1发射的信号同样可以被中继2接收到，因此，中继1在回传链路上发送的上行信号会对中继2接收终端发送的上行信号产生干扰，即回传链路1的上行传输会对接入链路的上行传输产生干扰。
图3A-3B的示例仅仅用于解释本申请，不应构成限定。可以看出，在多跳中继系统中，需要进行跨链路的干扰测量，确保各链路上的信号的正确接收。
不限于图3A-3B示出的3跳中继系统中，更多跳(如4跳、5跳等)中继系统中同样存在链路之间的干扰问题。
例如，如图4A所示，在4跳中继系统中，在下行传输时，中继2在回传链路3上发送的下行信号会对中继1接收基站发送的下行信号产生干扰。即回传链路3的下行传输会对回传链路1的下行传输产生干扰。
又例如，如图4B所示，在4跳中继系统中，在下行传输时，中继3在接入链路上发送的下行信号会对中继2接收中继1发送的下行信号产生干扰。即接入链路的下行传输会对回传链路2的下行传输产生干扰。
图4A-4B的示例仅仅用于解释本申请，不应构成限定。在图4A-4B的4跳中继系统或更多跳中继系统中，可以把其中任意3跳中继类似看作如图3A-3B所示的3跳中继，并分析链路间的干扰问题。关于如何进行跨链路的干扰测量，可参考后续实施例。
需要说明的，图2示出的无线通信系统100仅仅是为了更加清楚的说明本申请的技术方案，并不构成对本申请的限定，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，本申请提供的技术方案对于类似的技术问题，同样适用。
参考图5A，图5A示出了本申请的一些实施例提供的中继装置300。如图5A所示，中继装置300可包括：发射器305、接收器306。可选的，如图5B所示，中继装置300还可进一步的包括：一个或多个处理器301、耦合于处理器301的存储器302、通信接口303、发射器305、接收器306、耦合器和天线。图5A或图5B中示出的这些部件可通过总线304或者其他式连接，图5A或图5B中以通过总线连接为例。其中：
发射器305可用于对处理器301输出的信号进行发射处理，例如信号调制。接收器306可用于对天线接收的无线信号进行接收处理。例如信号解调。在本申请的一些实施例中，中继装置300可配置有两套收发装置，其中，一套收发装置用于其他通信设备接入到中继装置300的链路，另一套收发装置用于中继装置300接入其他通信设备的链路。以图3A-3B中的中继2为例，中继2可配置有一套用于接入链路的收发装置，还可以配置另一套用于 回传链路2的收发装置。如图5A所示，所示两套收发装置可包括：第一发射器3051和第一接收器3061构成的一套收发装置，第二发射器3052和第二接收器3062构成的另一套收发装置。这两套收发装置分别通过天线309、天线310发射或接收无线信号。具体的，这两套收发装置可具有相同或不同的收发特性，例如这两套收发装置各自对应的天线端口具备或不具备准共址(Quasi Co-location，QCL)特性。关于QCL的说明可参考后续发明原理部分。不限于图5A所示，中继装置300还可包括两套以上的收发装置。不限于图5A所示，这两套甚至多套收发装置可以集成为一个收发器，该收发器可以通过软件控制呈现出不同的收发特性。可选的，中继装置300还可仅配置有一套收发装置。以图3A-3B中的中继2为例，中继2可仅配置有一套收发装置，该收发装置既可以用于接入链路的收发，也可以用于回传链路2的收发。示例仅仅用于解释本申请，不应构成限定。
通信接口303可用于中继设备300与其他通信设备，例如中继设备、终端或网络设备，进行通信。具体的，通信接口303通信接口203可以是长期演进(LTE)(4G)通信接口，也可以是5G或者未来新空口的通信接口，还可以是无线高保真(Wireless-Fidelity，Wi-Fi)接口、全球微波互联接入(Worldwide Interoperability for Microwave Access，wimax)等宽带无线接口。不限于无线通信接口，中继设备300还可以配置有有线的通信接口303来支持有线通信，例如中继设备300与网络设备或其他中继设备之间的回程链接可以是有线通信连接。
存储器302与处理器301耦合，用于存储各种软件程序和/或多组指令。具体的，存储器302可包括高速随机存取的存储器，并且也可包括非易失性存储器，例如一个或多个磁盘存储设备、闪存设备或其他非易失性固态存储设备。存储器302可以存储操作系统(下述简称系统)，例如uCOS、VxWorks、RTLinux等嵌入式操作系统。存储器302还可以存储网络通信程序，该网络通信程序可用于与一个或多个中继设备，一个或多个终端设备，一个或多个网络设备进行通信。
处理器301可用于执行两部分逻辑功能：基站功能和终端功能。其中，基站功能用于为终端或其他接入的中继设备提供接入服务，终端功能用于在回传链路上收发数据。本申请中，处理器301可用于读取和执行计算机可读指令。具体的，处理器301可用于调用存储于存储器302中的程序，例如本申请的一个或多个实施例提供的信号传输方法的实现程序，并执行该程序包含的指令。
可以理解的，中继设备300可以是图2示出的无线通信系统100中的中继设备，可实施为中继基站，中继终端，中继收发器，中继收发节点(TRP)，中继代理等网络实体。需要说明的，图5A或图5B所示的中继设备300仅仅是本申请实施例的一种实现方式，实际应用中，中继设备300还可以包括更多或更少的部件，这里不作限制。
参考图6，图6示出了本申请的一些实施例提供的基站400。基站400可以是具有网络接入能力的网络设备。基站400可以是图2中的网络设备101。如图6所示，基站400可包括：一个或多个处理器401、存储器402、通信接口403、发射器405、接收器406、耦合器407和天线408。这些部件可通过总线404或者其他式连接，图6以通过总线连接为例。其中：
通信接口403可用于基站400与其他通信设备，例如终端或中继设备，进行通信。具体的，通信接口403通信接口203可以是长期演进(LTE)(4G)通信接口，也可以是5G或者未来新空口的通信接口。不限于无线通信接口，基站400还可以配置有有线的通信接口403来支持有线通信，例如一个基站400与其他基站400之间的回程链接可以是有线通信连接。
发射器405可用于对处理器401输出的信号进行发射处理，例如信号调制。接收器406可用于对天线408接收的无线信号进行接收处理。例如信号解调。在本申请的一些实施例中，发射器405和接收器406可看作一个无线调制解调器。在基站400中，发射器405和接收器406的数量均可以是一个或者多个。天线408可用于将传输线中的电磁能转换成自由空间中的电磁波，或者将自由空间中的电磁波转换成传输线中的电磁能。耦合器407可用于将移动通信号分成多路，分配给多个的接收器406。
存储器402与处理器401耦合，用于存储各种软件程序和/或多组指令。具体的，存储器402可包括高速随机存取的存储器，并且也可包括非易失性存储器，例如一个或多个磁盘存储设备、闪存设备或其他非易失性固态存储设备。存储器402可以存储操作系统(下述简称系统)，例如uCOS、VxWorks、RTLinux等嵌入式操作系统。存储器402还可以存储网络通信程序，该网络通信程序可用于与一个或多个中继设备，一个或多个终端设备，一个或多个网络设备进行通信。
处理器401可用于进行无线信道管理、实施呼叫和通信链路的建立和拆除，并为本控制区内的用户提供小区切换控制等。具体的，处理器401可包括：管理/通信模块(Administration Module/Communication Module，AM/CM)(用于话路交换和信息交换的中心)、基本模块(Basic Module，BM)(用于完成呼叫处理、信令处理、无线资源管理、无线链路的管理和电路维护功能)、码变换及子复用单元(Transcoder and SubMultiplexer，TCSM)(用于完成复用解复用及码变换功能)等等。
本申请中，处理器401可用于读取和执行计算机可读指令。具体的，处理器401可用于调用存储于存储器402中的程序，例如本申请的一个或多个实施例提供的信号传输方法的实现程序，并执行该程序包含的指令。
可以理解的，基站400可以是图2示出的无线通信系统100中的网络设备101，可实施为基站收发台，无线收发器，一个基本服务集(BSS)，一个扩展服务集(ESS)，NodeB，eNodeB，接入点或TRP等等。
需要说明的，图6所示的基站400仅仅是本申请实施例的一种实现方式，实际应用中，基站400还可以包括更多或更少的部件，这里不作限制。
基于前述无线通信系统100、中继装置300以及基站400分别对应的实施例，为了在多跳中继系统中实现跨链路的干扰测量，本申请实施例提供了一种信号传输方法。下述方法实施例中涉及的第一设备、第二设备可以是中继装置300。下述方法实施例中涉及的第一设备、第二设备也可以分别是后续图12实施例中的通信装置500、通信装置600。下述方法实施例中涉及的第一设备(或第二设备)可以实施成具有中继功能的基站，也可以实施成具有中继功能的终端，还可以实施成其他具有中继功能的通信装置，本申请不作限制。
本申请的主要发明原理可包括：在图3A-3B所示的3跳中继系统中，中继1为接入中继1的中继2配置参考信号资源，该参考信号用于接入链路和回传链路1之间的干扰测量。这样，中继2可以在配置的资源上接收或发送该参考信号，执行干扰测量。
具体的，利用参考信号进行干扰测量的主要方案可包括：
方案一，如图7A所示，中继1可以为中继2配置下行参考信号(如CSI-RS)资源，下行参考信号(如CSI-RS)用于接入链路的下行传输对回传链路1的下行传输的干扰测量。中继2可以将该下行参考信号映射到该下行参考信号资源上，然后在接入链路上发送该下行参考信号。由于中继1也可以接收到中继2发射的该下行参考信号(如图3A所示)，因此，中继1可以测量出中继2对中继1的干扰，即接入链路的下行传输对回传链路1的下行传输的干扰。
方案二，如图7B所示，中继1可以为中继2配置上行参考信号(如SRS)资源，上行参考信号(如SRS)用于回传链路1的上行传输对接入链路的上行传输的干扰测量。中继1在回传链路1上发送该上行参考信号。由于中继2根据该上行参考信号资源也可以在接入链路上接收到中继1发射的该上行参考信号(如图3B所示)，因此，中继2可以测量出中继1对中继2的干扰，即回传链路1的上行传输对接入链路的上行传输的干扰。
上述方案一和方案二中的干扰测量类型不同。可选的，中继2可以根据上述参考信号的类型确定出上述参考信号用于进行哪种干扰测量类型。就上述方案一和方案二来看，可以确定下行参考信号(如CSI-RS)用于接入链路对回传链路1的干扰测量，可以确定上行参考信号(如SRS)用于回传链路1对接入链路的干扰测量。
另外，还可以利用中继1与中继2之间的链路(即回传链路2)上的参考信号来测量接入链路和回传链路1之间的干扰。主要方案可包括：
方案三，如图7C所示，中继1可以为中继2配置上行参考信号(如SRS)资源，该上行参考信号(如SRS)用于接入链路的下行传输对回传链路1的下行传输的干扰测量。具体的，中继2可以在回传链路2上发送该上行参考信号。中继1可以利用回传链路1对应的接收装置接收该上行参考信号，并进行信道测量。该上行参考信号对应的测量结果可用于中继1确定中继2对中继1的干扰。即接入链路的下行传输对回传链路1的下行传输的干扰。
上述方案三的前提是：中继2在回传链路2上发送参考信号可等效于中继2在接入链路上发送参考信号。这个前提可通过下述方式实现：中继2在回传链路2和接入链路上发送参考信号的天线端口是准共址(QCL)的，或者中继2在回传链路2和接入链路上发送参考信号的波束是相同的。本申请中所述的波束(beam)，是指由至少一个天线端口发射或接收无线信号时，形成的空间中有一定方向和形状的无线电波。可以通过对至少一个天线端口所发射或者接收的无线信号进行幅度和/或相位的调整来构成波束，也可以通过其他方法，例如调整天线单元的相关参数，来构成波束。后续内容中提及的波束均可参考这里的解释。
可以理解的，由于中继2在回传链路2上发送参考信号可等效于中继2在接入链路上发送参考信号。因此，中继1利用回传链路1对应的接收装置接收的该上行参考信号可等效于中继2在接入链路上发送的参考信号对中继1产生的干扰。即接入链路的下行传输对 回传链路1的下行传输的干扰。
方案四，如图7D所示，中继1可以为中继2配置下行参考信号(如CSI-RS)资源，该下行参考信号(如CSI-RS)用于回传链路1的上行传输对接入链路的上行传输的干扰测量。中继1可以利用回传链路1对应的发射装置发送该下行参考信号。中继2在回传链路2上接收该上行参考信号，并进行信道测量。该上行参考信号对应的测量结果可用于中继2确定中继1对中继2的干扰，即回传链路1的上行传输对接入链路的上行传输的干扰。
上述方案四的前提是：中继2在回传链路2上接收参考信号可等效于中继2在接入链路上接收参考信号。这个前提可通过下述方式实现：中继2在回传链路2和接入链路上接收参考信号的天线端口是准共址(QCL)的，或者中继2在回传链路2和接入链路上接收参考信号的波束是相同的。
可以理解的，由于中继2在回传链路2上接收参考信号可等效于中继2在接入链路上接收参考信号，因此，中继2接收的该下行参考信号可等效于中继1可以利用回传链路1对应的发射装置发送该下行参考信号对中继2产生的干扰。即回传链路1的上行传输对接入链路的上行传输的干扰。
在上述方案三和方案四中，中继2具有多链路波束对应性能力。本申请中，中继2的多链路波束对应性能力可概括为：中继2在接入链路和回传链路2上发送或接收具有准共址QCL关系的天线端口的参考信号的能力。中继2的多链路波束对应性能力还可以概括为：中继2在接入链路和回传链路2上使用相同的波束或相同的空间滤波器(spatial filter)发送或接收参考信号的能力。空间滤波器可以为以下至少之一：预编码，天线端口的权值，天线端口的相位偏转，天线端口的幅度增益。这里，中继2的接入链路即中继2和终端之间的上行接入链路，中继2的回传链路即中继2和中继1之间的上行回传链路2。
可选的，中继2(或中继1)的回传链路和接入链路可以分别对应两套收发装置。如果这两套收发装置的收发特性相同，则中继2(或中继1)具有多链路波束对应性能力，否则，中继2(或中继1)不具有多链路波束对应性能力。
可选的，中继2(或中继1)的回传链路和接入链路可以共享同一套收发装置。可以理解的，由于中继2(或中继1)的回传链路和接入链路共享同一套收发装置，因此，回传链路和接入链路的发射(或接收)波束是相同的，即中继2(或中继1)具有多链路波束对应性能力。
应理解的，在图7C所示的方案三中，如果中继1具有多链路波束对应性能力，则可以不考虑中继1是利用回传链路1对应的接收装置还是回传链路2对应的接收装置来接收SRS，因为中继1在回传链路1上的接收波束和中继1在回传链路2上的接收波束是相同的。同样的，在图7D所示的方案四中，如果中继1具有多链路波束对应性能力，则可以不考虑中继1是利用回传链路1对应的发射装置还是回传链路2对应的发射装置来接收CSI-RS
综合上述四种方案，用于链路间的干扰测量的参考信号对应的干扰测量类型可包括以下两种：
第一种测量类型，所述接入链路的下行传输对所述回传链路1的下行传输的干扰测量，或接入链路下行传输对中继1的干扰的测量。
第二种测量类型，所述回传链路1的上行传输对所述接入链路的上行传输的干扰测量， 或回传链路1上行传输对中继2的干扰的测量。
本申请中，可以通过下述几种方式来指示上述参考信号对应的测量类型：
第一种方式，中继1可以在发送给中继2的资源配置信息中携带上述测量类型的指示信息。例如，对现有的资源配置信息中的预留字段进行扩展，利用扩展的预留字段来指示上述测量类型。示例仅仅是本申请提供的一种示例，不应构成限定。
第二种方式，中继1可以另外向中继2发送指示信息，该指示信息用于指示上述测量类型。本申请中，该指示信息可称为第一指示信息。
第三种方式，参考信号资源可以关联测量类型。例如，映射在“资源图样(pattern)(或集合)1”表征的资源上的参考信号用于上述第一种测量类型的干扰测量，映射在“资源图样(pattern)(或集合)2”表征的资源上的参考信号用于上述第二种测量类型的干扰测量。示例仅仅用于解释本申请，不应构成限定。具体的，这种关联可以通过协议预定义，也可通过高层信令静态或半静态的配置。关于这种关联的具体实现，本申请不作限制。
除了指示出上述第一种测量类型，中继1还可以指示中继2在配置的资源上发送参考信号(参考图7A和图7C)，用以指示中继2执行所述接入链路的下行传输对所述回传链路1的下行传输的干扰测量。这样，中继2可以根据指示发送该参考信号。中继1可以接收到该参考信号，测量出中继2对中继1的干扰。
同样的，除了指示出上述第二种测量类型，中继1还可以指示中继2在配置的资源上接收参考信号(参考图7B和图7D)，用以指示中继2执行所述回传链路1的上行传输对所述接入链路的上行传输的干扰测量。这样，中继2可以根据指示接收到中继1发送的该参考信号，测量出中继1对中继2的干扰。
可选的，上述第一指示信息也可用于指示中继2在配置的资源上是发送参考信号还是接收参考信号。可选的，这种用于指示中继2在配置的资源上是发送参考信号还是接收参考信号的信息也可以携带在中继1发送给中继2的资源配置信息中。
在图3A-3B或图7A-7D所示的3跳中继系统中，中继2可称为第一设备，中继1可称为第二设备，网络设备(如基站)可称为第三设备，终端可称为第四设备。接入链路可称为第一链路，回传链路1可称为第二链路，回传链路2可称为第三链路。
上述通过图3A-3B或图7A-7D所示的3跳中继系统描述的主要发明原理也适用更多跳中继系统。在更多跳中继系统中，可以对任意3跳中继应用上述主要发明原理。应理解的，在更多跳中继系统中，第三设备可以是中继设备，而不是网络设备。第四设备可以是中继设备，而不是终端。
本申请涉及的资源包括时频资源或码域资源中的至少一种，其中，时频资源包括时域资源和频域资源，通常以资源粒子(Resource Element，RE)，资源块(Resource Block，RB)，符号(symbol)，子载波(subcarrier)，传输间隔(Transmission Time Interval，TTI)表示。资源粒子、资源块等概念的定义可以参考LTE标准，但是不限于LTE标准，未来通信标准中关于各种时频资源形式的定义可能不同。码域资源是指用于码分复用的序列码。
本申请中涉及的准共址(QCL)可以说明如下：
QCL是指两个天线端口具有相同的空间参数，或者，是指两个天线端口的空间参数的差值小于某阈值。这里，所述的天线端口为具有不同天线端口编号的天线端口，和/或具有 相同天线端口号在不同时间和/或频率和/或码域资源内进行信息发送或接收的天线端口，和/或具有不同天线端口号在不同时间和/或频率和/或码域资源内进行信息发送或接收的天线端口。这里，空间参数可以包括时延扩展，多普勒扩展，多普勒频移，平均时延，平均增益，到达角(angle of arrival，AOA)，平均AOA、AOA扩展，离开角(angle of Departure，AOD)，平均离开角AOD、AOD扩展，接收天线空间相关性参数，发送天线空间相关性参数，发送波束，接收波束，资源标识中的至少一个。其中，所述波束可包括预编码，权值序号，波束序号中的至少一项。所述角度可以为不同维度的分解值，或不同维度分解值的组合。所述资源标识包括信道状态信息参考信号(Channel State Information Reference Signal,CSI-RS)资源标识，或SRS资源标识，或同步信号/同步信号块的资源标识，或PRACH上传输的前导序列的资源标识、或DMRS的资源标识，用于指示资源上的波束。
应理解的，如果两个天线端口是QCL的，那么可以根据一个天线端口的参数确定出另一个天线端口的空间参数。
例如，两个天线端口是具有QCL关系的可以是指这两个天线端口发射(或接收)信号时具有相同的AOA或AOD，用于表示具有相同的接收波束或发送波束。又例如，两个天线端口是QCL的可以是指这两个天线端口发射(或接收)信号时的AOA和AOD具有对应关系。再例如，两个天线端口是QCL的可以是指这两个天线端口发射(或接收)信号时的AOD和AOA具有对应关系。
两个天线端口是具有QCL关系的还可以理解为这两个天线端口具有波束对应性，对应的波束包括以下至少之一：相同的接收波束、相同的发送波束、与接收波束对应的发送波束、与发送波束对应的接收波束。也即是说，可以利用波束对应性，根据下行接收波束确定上行发送波束，或根据上行发送波束确定下行接收波束。相同波束可以是指两个参考信号天线端口具有QCL关系，不同波束可以是指两个参考信号天线端口不具有QCL关系。这里，相同波束还可以理解为相同的空间滤波器。
两个天线端口是具有QCL关系的还可以理解为这两个天线端口发射的信号具有对应的或相同波束对连接(BPL,beam pair link)，对应的BPL包括以下至少之一：相同的下行BPL，相同的上行BPL，与下行BPL对应的上行BPL，与上行BPL对应的下行BPL。
基于上述发明原理，下面通过四个实施例来详细说明本申请提供的信号传输方法。
图8示出了本申请的一个实施例提供的信号传输方法。在图8实施例中，第一设备不具有多链路波束对应性能力。第一设备根据第二设备配置的CSI-RS资源在第一链路上发送该CSI-RS，对应图7A所示场景。该CSI-RS用于第一链路的下行传输对第二链路的下行传输的干扰测量。该CSI-RS可以是但不限于是CSI-RS。下面以CSI-RS为例展开描述图8实施例：
S101-S102，发起干扰测量请求。具体如下：
S101，第一设备向第二设备发送干扰测量请求，用于请求测量第一设备对第二设备的干扰，即请求测量第一链路的下行传输对第二链路的下行传输的干扰，即请求第一种测量类型的干扰测量。可选的，该干扰测量请求可以包含用于干扰测量的参考信号对应的子载波间隔、资源数量等资源配置参数。这里，该资源数量可以通过扫描波束数量确定。例如 一个资源对应一个波束时，资源和波束的数量相同。
S102，第二设备向第一设备发送干扰测量请求，用于请求测量第一设备对第二设备的干扰，即请求测量第一链路的下行传输对第二链路的下行传输的干扰。可选的，该干扰测量请求可以包含用于干扰测量的参考信号对应的子载波间隔、资源数量等资源配置参数。这里，该资源数量可以通过扫描波束数量确定。通过S102请求的资源可以是下行零功率资源，例如下行CSI-RS零功率资源(Zero Power CSI-RS，ZP-CSI-RS)资源。
不限于S101-S102，干扰测量还可以由第二设备发起。例如在第二设备已知第一设备为中继的条件下，第二设备可以触发干扰测量，即向第三设备发送干扰测量请求。即S101是可选的。
不限于S101-S102，干扰测量还可以由第三设备发起。例如在第三设备已知第二设备、第一设备为中继的条件下，第三设备可以触发干扰测量。即S101-S102是可选的，第三设备可以直接为第一设备配置发送参考信号的资源，可参考S103。
S103-S104，分配用于干扰测量的CSI-RS资源。
具体的，第三设备可以向第二设备发送资源配置信息，该资源配置信息指示的资源可以是下行零功率资源，例如ZP-CSI-RS资源，可参考S103。然后，第二设备可以向第一设备发送资源配置信息，该资源配置信息指示的资源可以是CSI-RS资源，用于第一设备在第一链路上发送该CSI-RS，可参考S104。
这里，CSI-RS资源可以是第二设备从上述下行零功率资源中为CSI-RS分配的资源。CSI-RS资源可包括时频资源或码域资源(用于码分的序列码)中的至少一种。
具体的，可以通过下面几种方式指示CSI-RS对应的测量类型是第一种测量类型：
第一种方式，上述资源配置信息还可以包含第一种测量类型的指示信息。具体的，第三设备发送的资源配置信息可包括该指示信息，用于指示上述下行零功率资源用于第一设备对第二设备的干扰测量。具体的，第二设备发送的资源配置信息也可包括该指示信息，用于指示CSI-RS资源用于第一设备在第一链路上发送CSI-RS。
可选的，该指示信息指示下述含义时也可以表示CSI-RS对应的测量类型是第一种测量类型：
例如，该指示信息可以指示第二设备配置的CSI-RS资源用于响应S101-S102中的干扰测量请求。又例如，该指示信息可以是CSI-RS波束组指示，用于指示该CSI-RS的发送波束为第一链路的下行波束组内的波束。又例如，该指示信息可以指示该CSI-RS用于测量链路间的干扰。再例如，该指示信息可以指示第二设备配置的CSI-RS资源用于第一设备发射CSI-RS。再例如，该指示信息可以指示第二设备配置的CSI-RS资源属于第一链路的资源。示例仅仅是本申请提供的一些实施例，本申请对该指示信息的具体指示含义不作限制，只要能够明确指示CSI-RS对应的第一种测量类型即可。
第二种方式，第二设备可以向第一设备发送第一指示信息，用于指示CSI-RS对应的测量类型是第一种测量类型，可参考S105。
可选的，第一指示信息指示下述含义时也可以表示CSI-RS对应的测量类型是第一种测量类型：
例如，第一指示信息可以指示第二设备配置的CSI-RS资源用于响应S101-S102中的干 扰测量请求。又例如，第一指示信息可以是CSI-RS波束组指示，用于指示该CSI-RS的发送波束为第三链路的上行波束组内的波束。又例如，第一指示信息可以指示该CSI-RS用于测量链路间的干扰。再例如，该指示信息可以指示第二设备配置的CSI-RS资源用于第一设备发射CSI-RS。再例如，该指示信息可以指示第二设备配置的CSI-RS资源属于第一链路的资源。示例仅仅是本申请提供的一些实施例，本申请对第一指示信息的具体指示含义不作限制，只要能够明确指示CSI-RS对应的第一种测量类型即可。
第三种方式，CSI-RS资源(或ZP-CSI-RS资源)可以是第一种测量类型关联的资源。第一种测量类型关联的资源可以通过协议预定义或通过高层信令配置。
例如，如果CSI-RS资源是第一链路的资源，则该CSI-RS资源为第一种测量类型关联的资源。示例仅仅是本申请提供的一种示例，实际应用中还可以不同，不应构成限定。
除了指示出上述第一种测量类型，第二设备还可以指示第一设备发送CSI-RS。可选的，上述第一指示信息也可用于指示第一设备发送CSI-RS。可选的，这种用于指示第一设备发送CSI-RS的信息也可以携带在第二设备发送给第一设备的资源配置信息中。
关于上面几种指示第一种测量类型的方式具体可参考发明原理部分的相关内容，这里不再赘述。
S106，第一设备在CSI-RS资源配置信息指示的资源上发送CSI-RS，即在第一链路上发送CSI-RS。可以理解的，当第一设备在第一链路上发送CSI-RS时，第二设备也可以接收到第一设备发射的CSI-RS(即干扰)，即第二设备可以检测到第一设备对第二设备产生的干扰。该干扰即第一链路的下行传输对第二链路的下行传输的干扰。
S107，第二设备测量干扰，并向第一设备返回针对该干扰的测量结果。
具体的，该测量结果的实现方式可包括下述两种：
第一种方式，该测量结果可包括参考信号资源(或资源组)的标识，如资源指示符(resource indicator)或资源集合ID等。一个资源(或资源组)的标识可以对应一个第一设备的发送波束。
具体的，可以通过协议预定义，或者通过高层信令静态的或半静态的配置可用波束(或不可用波束)对应的一些资源(或资源组)的标识。即，第一设备在第一链路上发送CSI-RS的波束与这些资源(或资源组)的标识对应的波束具有对应性。
第二种方式，该测量结果可包括每个CSI-RS的资源对应的测量值，如参考信号接收功率(reference signal reception power，RSRP),信道质量指示(channel quality indicator，CQI)接收信号强度指示(Received Signal Strength Indication，RSSI)，参考信号接收质量ReferenceSignalReceivingQuality，RSRQ)或对应的量化值。
不限于上述两种方式，该测量结果还可以通过其他方式实现，这里不作限制。
S108，第一设备根据测量结果选择第一链路的下行发送波束。这样，第一设备可以选择出较优的下行发送波束，避免第一设备对第二设备产生干扰。
可选的，如果测量结果是通过上述第一种方式实现，则第一设备可以根据协议配置的资源(或资源组)的标识确定CSI-RS的波束是可用还是不可用，即确定CSI-RS和协议配置的资源(或资源组)承载的信号具有QCL关系或不具有QCL关系。可选的，可以规定这种根据资源(或资源组)的标识确定波束的方式在一段预定义的或基站配置的资源中有 效。
可选的，如果测量结果是通过上述第二种方式实现，则第一设备可以根据上述测量值选择第一链路的下行发送波束。
图9示出了本申请的另一个实施例提供的信号传输方法。在图9实施例中，第一设备具有多链路波束对应性能力。第一设备根据第二设备配置的上行参考信号资源在第三链路上发射该上行参考信号，对应图7C所示场景。该上行参考信号用于第一链路的下行传输对第二链路的下行传输的干扰测量。该上行参考信号可以是但不限于是SRS。下面以SRS为例展开描述图9实施例：
S201-S202，发起干扰测量请求。
具体可参考图8实施例中的S101-S102，这里不再赘述。
S203-S204，分配用于干扰测量的SRS资源。
具体的，第三设备可以向第二设备发送资源配置信息，该资源配置信息指示的资源可以是上行零功率资源，例如ZP-SRS资源，可参考S203。然后，第二设备可以向第一设备发送资源配置信息，该资源配置信息指示的资源可以是SRS资源，用于第一设备在第一链路上发送该SRS，可参考S204。
这里，SRS资源可以是第二设备从上述上行零功率资源(如ZP-SRS资源)中为SRS分配的资源。SRS资源可包括时频资源或码域资源(用于码分的序列码)中的至少一种。
具体的，可以通过下面几种方式指示SRS对应的测量类型是第一种测量类型：
第一种方式，上述资源配置信息还可以包含第一种测量类型的指示信息。具体的，第三设备发送的资源配置信息可包括该指示信息，用于指示上述下行零功率资源用于第一设备对第二设备的干扰测量。具体的，第二设备发送的资源配置信息也可包括该指示信息，用于指示SRS资源用于第一设备在第一链路上发送SRS。
可选的，该指示信息指示下述含义时也可以表示SRS对应的测量类型是第一种测量类型：
例如，该指示信息可以指示第二设备配置的SRS资源用于响应S201-S202中的干扰测量请求。又例如，该指示信息可以是SRS波束组指示，用于指示该SRS的发送波束为第三链路的上行波束组内的波束或第一链路的下行波束组内的波束。又例如，该指示信息可以指示该SRS用于测量单链路的信道状态信息，即用于测量第三链路的信道状态信息。再例如，该指示信息可以指示第二设备配置的SRS资源用于第一设备发射SRS。再例如，该指示信息可以指示第二设备配置的SRS资源属于第三链路的资源。示例仅仅是本申请提供的一些实施例，本申请对该指示信息的具体指示含义不作限制，只要能够明确指示SRS对应第一种测量类型即可。
第二种方式，第二设备可以向第一设备发送第一指示信息，用于指示SRS对应的测量类型是第一种测量类型，具体可参考S205。
可选的，第一指示信息指示下述含义时也可以表示SRS对应的测量类型是第一种测量类型：
例如，第一指示信息可以指示第二设备配置的SRS资源用于响应S201-S202中的干扰测 量请求。又例如，第一指示信息可以是SRS波束组指示，用于指示该SRS的发送波束为第三链路的上行波束组内的波束或第一链路的下行波束组内的波束。又例如，第一指示信息可以指示该SRS用于测量单链路的信道状态信息，即用于测量第三链路的信道状态信息。再例如，该指示信息可以指示第二设备配置的SRS资源用于第一设备发射SRS。再例如，该指示信息可以指示第二设备配置的SRS资源属于第三链路的资源。示例仅仅是本申请提供的一些实施例，本申请对第一指示信息的具体指示含义不作限制，只要能够明确指示SRS对应第一种测量类型即可。
第三种方式，SRS资源(或ZP-SRS资源)可以是第一种测量类型关联的资源。第二种测量类型关联的资源可以通过协议预定义或通过高层信令配置。
除了指示出第一种测量类型，第二设备还可以指示第一设备发送SRS。可选的，第一指示信息也可用于指示第一设备发送SRS。可选的，这种用于指示第一设备发送SRS的信息也可以携带在第二设备发送给第一设备的资源配置信息中。
关于上面几种指示第一种测量类型的方式具体可参考发明原理部分的相关内容，这里不再赘述。
S206，第一设备在第三链路上发送SRS。相应的，第二设备接收第一设备发射的SRS。参考前述发明原理部分可知，如果第二设备不具有波束对应性能力，则第二设备利用第二链路对应的接收装置来接收第一设备发送的SRS。如果第二设备具有波束对应性能力，则第二设备可以利用第二链路对应的接收装置接收第一设备发射的SRS，也可以利用第三链路对应的接收装置来接收第一设备发射的SRS。可选的，第一链路对应的接收装置和第二链路对应的接收装置可以是相同的(或同一个)接收装置。
可以理解的，由于第一设备具有多链路波束对应性能力，第一设备在第三链路上发送参考信号可等效于第一设备在第一链路上发送参考信号。因此，第二设备接收的SRS可等效于第一设备在第一链路上发送参考信号时对第二设备产生的干扰。该干扰即第一链路的下行传输对第二链路的下行传输的干扰。
S207，第二设备测量干扰，并向第一设备返回测量结果。
S208，第一设备根据测量结果选择第一链路的下行发送波束。这样，第一设备可以选择出较优的下行发送波束，避免第一设备对第二设备产生干扰。
具体的，关于测量结果的具体实现，以及根据测量结果选择波束的具体实现可参考图8实施例中的相关内容，这里不再赘述。
图10示出了本申请的再一个实施例提供的信号传输方法。在图10实施例中，第一设备不具有多链路波束对应性能力。第一设备根据第二设备配置的上行参考信号资源接收该上行参考信号，对应图7B所示场景。该上行参考信号用于第二链路的上行传输对第一链路的上行传输的干扰测量。该上行参考信号可以是但不限于是SRS。下面以SRS为例展开描述图10实施例：
S301-S302，发起干扰测量请求。
具体的，该干扰测量请求用于请求测量第二设备对第一设备的干扰，即请求测量第二链路的上行传输对第一链路的上行传输的干扰，即请求第二种测量类型的干扰测量。关于 S301-S302的具体实现可参考图8实施例中的S101-S103，这里不赘述。
S303-S304，分配用于干扰测量的SRS资源。
具体的，第三设备可以向第二设备发送资源配置信息，该资源配置信息指示的资源可以是下行零功率资源，例如ZP-SRS资源，可参考S303。然后，第二设备可以向第一设备发送资源配置信息，该资源配置信息指示的资源可以是SRS资源，用于第一设备接收第二设备发射的SRS，可参考S304。
这里，SRS资资源可以是第二设备从上述下行零功率资源中为SRS资分配的资源。SRS资源可包括时频资源或码域资源(用于码分的序列码)中的至少一种。
具体的，可以通过下面几种方式指示SRS对应的测量类型是第二种测量类型：
第一种方式，上述资源配置信息还可以包含第二种测量类型的指示信息。具体的，第三设备发送的资源配置信息可包括该指示信息，用于指示上述下行零功率资源用于第二设备对第一设备的干扰测量。具体的，第二设备发送的资源配置信息也可包括该指示信息，用于指示SRS资源用于第二设备接收SRS。
可选的，该指示信息指示下述含义时也可以表示SRS对应的测量类型是第二种测量类型：
例如，该指示信息可以指示第二设备配置的SRS资源用于响应S301-S302中的干扰测量请求。又例如，该指示信息可以是SRS波束组指示，用于指示该SRS的接收波束为第一链路的上行波束组内的波束。又例如，该指示信息可以指示该SRS用于测量链路间的干扰。再例如，该指示信息可以指示第二设备配置的SRS资源用于第二设备发射SRS。再例如，该指示信息可以指示第二设备配置的SRS资源属于第二链路的资源。示例仅仅是本申请提供的一些实施例，本申请对该指示信息的具体指示含义不作限制，只要能够明确指示SRS对应第二种测量类型即可。
第二种方式，第二设备可以向第一设备发送第一指示信息，用于指示SRS对应的测量类型是第一种测量类型，可参考S305。
可选的，第一指示信息指示下述含义时也可以表示SRS对应的测量类型是第二种测量类型：
例如，第一指示信息可以指示第二设备配置的SRS资源用于响应S101-S102中的干扰测量请求。又例如，第一指示信息可以是SRS波束组指示，用于指示该SRS的接收波束为第一链路的上行波束组内的波束。又例如，该指示信息可以指示该SRS用于测量链路间的干扰。再例如，该指示信息可以指示第二设备配置的SRS资源用于第二设备发射SRS。再例如，该指示信息可以指示第二设备配置的SRS资源属于第二链路的资源。示例仅仅是本申请提供的一些实施例，本申请对第一指示信息的具体指示含义不作限制，只要能够明确指示SRS对应第二种测量类型即可。
第三种方式，SRS资源(或ZP-SRS资源)可以是第二种测量类型关联的资源。第二种测量类型关联的资源可以通过协议预定义或通过高层信令配置。
除了指示出上述第二种测量类型，第二设备还可以指示第一设备接收SRS。可选的，第一指示信息也可用于指示第一设备接收SRS。可选的，这种用于指示第一设备接收SRS的信息也可以携带在第二设备发送给第一设备的资源配置信息中。
关于上面几种指示第二种测量类型的方式具体可参考发明原理部分的相关内容，这里不再赘述。
S306，第二设备在第二链路上发送SRS。可以理解的，当第一设备在第二链路上发送SRS时，第一设备也可以接收到第二设备发射的SRS(即干扰)，即第一设备可以检测到第二设备对第一设备产生的干扰。该干扰即第二链路的上行传输对第一链路的上行传输的干扰。
S307，第一设备测量干扰，并向第二设备返回针对该干扰的测量结果。
S308，第一设备根据测量结果选择第一链路的上行接收波束。这样，第一设备可以选择出较优的上行接收波束，避免第二设备对第一设备产生干扰。
具体的，关于测量结果的具体实现，以及根据测量结果选择波束的具体实现可参考图8实施例中的相关内容，这里不再赘述。
图11示出了本申请的再一个实施例提供的信号传输方法。在图11实施例中，第一设备具有多链路波束对应性能力。第一设备根据第二设备配置的下行参考信号资源接收该下行参考信号，对应图7D所示场景。该下行参考信号用于第二链路的上行传输对第一链路的上行传输的干扰测量。该下行参考信号可以是但不限于是CSI-RS。下面以CSI-RS为例展开描述图11实施例：
S401-S402，发起干扰测量请求。
S403-S404，分配用于干扰测量的CSI-RS资源。
具体的，第三设备可以向第二设备发送资源配置信息，该资源配置信息指示的资源可以是上行零功率资源，例如ZP-CSI-RS资源，可参考S403。然后，第二设备可以向第一设备发送资源配置信息，该资源配置信息指示的资源可以是CSI-RS资源，用于第一设备在第三链路上接收该CSI-RS，可参考S404。
这里，CSI-RS资源可以是第二设备从上述上行零功率资源(如ZP-CSI-RS资源)中为CSI-RS分配的资源。CSI-RS资源可包括时频资源或码域资源(用于码分的序列码)中的至少一种。
具体的，可以通过下面几种方式指示CSI-RS对应的测量类型是第二种测量类型：
第一种方式，上述资源配置信息还可以包含第二种测量类型的指示信息。具体的，第三设备发送的资源配置信息可包括该指示信息，用于指示上述下行零功率资源用于第二设备对第一设备的干扰测量。具体的，第二设备发送的资源配置信息也可包括该指示信息，用于指示CSI-RS资源用于第一设备在第三链路上接收CSI-RS。
可选的，该指示信息指示下述含义时也可以表示CSI-RS对应的测量类型是第二种测量类型：
例如，该指示信息可以指示第二设备配置的CSI-RS资源用于响应S401-S402中的干扰测量请求。又例如，该指示信息可以是CSI-RS波束组指示，用于指示该CSI-RS的接收波束为第三链路的下行波束组内的波束或第一链路的上行波束组内的波束。又例如，该指示信息可以指示该CSI-RS用于测量单链路的信道状态信息，即用于测量第三链路的信道状态信息。再例如，该指示信息可以指示第二设备配置的CSI-RS资源用于第二设备发射CSI-RS。 再例如，该指示信息可以指示第二设备配置的CSI-RS资源属于第三链路的资源。示例仅仅是本申请提供的一些实施例，本申请对该指示信息的具体指示含义不作限制，只要能够明确指示CSI-RS对应第二种测量类型即可。
第二种方式，第二设备可以向第一设备发送第一指示信息，用于指示CSI-RS对应的测量类型是第二种测量类型，具体可参考S405。
可选的，第一指示信息指示下述含义时也可以表示CSI-RS对应的测量类型是第二种测量类型：
例如，该指示信息可以指示第二设备配置的CSI-RS资源用于响应S401-S402中的干扰测量请求。又例如，该指示信息可以是CSI-RS波束组指示，用于指示该CSI-RS的接收波束为第三链路的下行波束组内的波束或第一链路的上行波束组内的波束。又例如，该指示信息可以指示该CSI-RS用于测量单链路的信道状态信息，即用于测量第三链路的信道状态信息。再例如，该指示信息可以指示第二设备配置的CSI-RS资源用于第二设备发射CSI-RS。再例如，该指示信息可以指示第二设备配置的CSI-RS资源属于第三链路的资源。示例仅仅是本申请提供的一些实施例，本申请对第一指示信息的具体指示含义不作限制，只要能够明确指示CSI-RS对应第二种测量类型即可。
第三种方式，CSI-RS资源(或ZP-CSI-RS资源)可以是第二种测量类型关联的资源。第二种测量类型关联的资源可以通过协议预定义或通过高层信令配置。
除了指示出第二种测量类型，第二设备还可以指示第一设备接收CSI-RS。可选的，第一指示信息也可用于指示第一设备接收CSI-RS。可选的，这种用于指示第一设备接收CSI-RS的信息也可以携带在第二设备发送给第一设备的资源配置信息中。
关于上面几种指示第二种测量类型的方式具体可参考发明原理部分的相关内容，这里不再赘述。
S406，第二设备在第三链路上发送CSI-RS。相应的，第一设备接收第二设备发送的CSI-RS。参考前述发明原理部分可知，如果第二设备不具有波束对应性能力，则第二设备利用第二链路对应的发射装置来发送CSI-RS。如果第二设备具有波束对应性能力，则第二设备可以利用第二链路对应的发射装置来发送CSI-RS，也可以利用第三链路对应的发射装置来发送CSI-RS。可选的，对于第二设备来说，第二链路对应的发射装置和第三链路对应的发射装置可以是相同的(或同一个)发射装置。
可以理解的，由于第一设备具有多链路波束对应性能力，第一设备在第三链路上接收参考信号可等效于第一设备在第一链路上接收参考信号。因此，第一设备接收的CSI-RS可等效于第二设备发送参考信号时对第一设备产生的干扰。该干扰即第一链路的下行传输对第二链路的下行传输的干扰。
S407，第二设备测量干扰，并向第一设备返回测量结果。
S408，第一设备根据测量结果选择第一链路的上行发送波束。这样，第一设备可以选择出较优的上行接收波束，避免第二设备对第一设备产生干扰。
具体的，关于测量结果的具体实现，以及根据测量结果选择波束的具体实现可参考图8实施例中的相关内容，这里不再赘述。
结合图8-11分别对应的实施例，下面进一步补充说明本申请提供的一些可选实施例。
在一些实施例中，第一设备可以向第二设备发送第一上报信息，用于上报第一设备是否具备多链路波束对应性能力。可选的，第二设备还可以向第三设备继续上报第一设备是否具备多链路波束对应性能力。关于波束对应性能力的说明可参考发明原理部分，这里不再赘述。
通过第一设备向第二设备上报多链路波束对应性能力，可以使得第二设备根据第一设备是否具有波束对应性能力来确定采用哪一种干扰测量方法。具体的，第二设备可以第一设备是否具有波束对应性能力确定采用上面哪个实施例对应的方案。具体可如下：
当参考信号用于第一种测量类型的干扰测量时，如果第一设备不具有波束对应性能力，则第二设备可以配置第一设备在第一链路上发送下行参考信号(如CSI-RS)，可参考图8实施例。如果第一设备具有波束对应性能力，则第二设备可以配置第一设备在第三链路上发送上行参考信号(如SRS)，可参考图9实施例。可选的，如果第一设备具有波束对应性能力，则第二设备也可以配置第一设备在第一链路上发送下行参考信号(如CSI-RS)，可参考图8实施例。
当参考信号用于第二种测量类型的干扰测量时，如果第一设备不具有波束对应性能力，则第二设备可以配置第一设备接收上行参考信号(如SRS)，可参考图10实施例。如果第一设备具有波束对应性能力，则第二设备可以配置第一设备在第三链路上接收下行参考信号(如CSI-RS)，可参考图11实施例。可选的，如果第一设备具有波束对应性能力，则第二设备也可以配置第一设备接收上行参考信号(如SRS)，可参考图10实施例。
在一些实施例中，在利用参考信号测量得到链路间的干扰之后，测量结果不限于用于进行波束选择，还可以用于其他方面。例如可用于数据传输频率资源的选择，当某个频带范围内的干扰较大时，设备不调度该频带的资源用于数据传输。又例如，测量结果还可用于中继选择，当第一链路和第二链路间干扰较大时，终端可以直接接入第二设备。本申请对干扰测量的应用不作限制。
参见图12，图12示出了本申请提供一种无线通信系统及相关通信装置。无线通信系统10包括：通信装置500和通信装置600。无线通信系统10可以是图2所示的无线通信系统100。其中，通信装置500和通信装置600均是中继节点，都可以是图2所示的无线通信系统100中的中继设备103。通信装置500(或通信装置600)可以是具有中继功能的网络设备，也可以是具有中继功能的终端。具体在图3A或图3B所示的3跳中继系统中，通信装置500可以是中继2，通信装置600可以是中继1，通信装置500和终端(或另一个中继设备)之间的链路可称为第一链路，通信装置600和基站(或另一个中继设备)之间的链路可称为第二链路。通信装置500和通信装置600之间的链路可称为第三链路。在硬件实现上，通信装置500可以为图5A或图5B实施例中的中继装置300，通信装置600可以为图6实施例中的基站400。下面分别描述通信装置500和通信装置600各自包含的功能单元。
如图12所示，通信装置500可包括：第一通信单元401和第二通信单元403。其中：
第一通信单元401可用于接收通信装置600发送的参考信号资源配置信息。这里，所述参考信号资源配置信息可用于第一链路和第二链路之间的干扰测量。
第二通信单元403可用于用于在所述参考信号资源配置信息指示的资源上发送或接收参考信号。
通信装置500中，第二通信单元403负责参考信号的发送或接收，第一通信单元401负责接收通信装置600发送的一些配置信息(如资源配置信息)或向通信装置600上报多链路波束对应性能力、测量结果等信息。
具体的，关于通信装置500包括的各个功能单元的具体实现可参考前述各个实施例，这里不再赘述。
如图12所示，通信装置600可包括：第一通信单元501和第二通信单元503。其中：
第一通信单元501可用于向通信装置500发送参考信号资源配置信息。这里，所述参考信号资源配置信息可用于第一链路和第二链路之间的干扰测量。
第二通信单元503可用于在所述资源配置信息指示的资源上发送或接收参考信号。
通信装置600中，第二通信单元403负责参考信号的发送或接收，第一通信单元401负责向通信装置500发送一些配置信息(如资源配置信息)或接收通信装置500上报的多链路波束对应性能力、测量结果等信息。
具体的，关于通信装置600包括的各个功能单元的具体实现可参考前述各个实施例，这里不再赘述。
综上，实施本申请提供的技术方案，可实现在多跳中继系统中测量出链路之间的干扰，进而可以通过波束选择等措施避免这种干扰。
可以理解的是，当本申请的实施例应用于网络设备芯片(或终端芯片)时，该网络设备芯片(或终端芯片)可以实现上述方法实施例中第一设备设备的功能。这时，该网络设备芯片(或终端芯片)从网络设备(或终端)中的其它模块(如射频模块或天线)接收上述参考信号资源配置信息。
当本申请的实施例应用于网络设备芯片(或终端芯片)时，该网络设备芯片(或终端芯片)也可以实现上述方法实施例中第二设备设备的功能。这时，该网络设备芯片(或终端芯片)向网络设备(或终端)中的其它模块(如射频模块或天线)发送上述参考信号资源配置信息。
本申请实施例中所述的通信装置可以是一种网络设备，也可以是一种终端设备，还可以是一种芯片系统。其中，所述芯片系统中包含至少一个芯片，还可以包含其他分立器件。所述芯片系统可以应用于网络设备或者终端设备，以支持所述网络设备或者终端设备完成本申请实施例中提供的方法。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，该流程可以由计算机程序来指令相关的硬件完成，该程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。而前述的存储介质包括：ROM或随机存储记忆体RAM、磁碟或者光盘等各种可存储程序代码的介质。

Claims (30)

  1. 一种信号传输方法，其特征在于，包括：
    第一设备接收第二设备发送的参考信号资源配置信息，所述参考信号用于第一链路和第二链路之间的干扰测量，其中，所述第一链路为所述第一设备与第四设备之间的链路，所述第二链路为所述第二设备与第三设备之间的链路，所述第一设备和所述第二设备是所述第三设备和所述第四设备之间的中继节点；
    所述第一设备在所述参考信号资源配置信息指示的参考信号资源上发送或接收参考信号。
  2. 如权利要求1所述的方法，其特征在于，所述第一设备在所述参考信号资源配置信息指示的参考信号资源上发送或接收所述参考信号，包括：
    所述第一设备根据所述参考信号资源配置信息在所述第一链路上发送或接收所述参考信号。
  3. 如权利要求1或2所述的方法，其特征在于，还包括：所述第一设备接收所述第二设备发送的第一指示信息；
    所述第一指示信息用于指示以下至少一项：所述参考信号用于所述第一链路的下行传输对所述第二链路的下行传输的干扰测量，或所述第一设备在所述参考信号资源配置信息指示的参考信号资源上发送所述参考信号。
  4. 如权利要求1或2所述的方法，其特征在于，还包括：所述第一设备接收所述第二设备发送的第一指示信息；
    所述第一指示信息用于指示以下至少一项：所述参考信号用于所述第二链路的上行传输对所述第一链路的上行传输的干扰测量，或所述第一设备在所述参考信号资源配置信息指示的参考信号资源上接收所述参考信号。
  5. 如权利要求1-4中任一项所述的方法，其特征在于，所述参考信号资源配置信息中包含：所述参考信号对应的测量类型的指示信息；其中，所述测量类型包括：所述第一链路的下行传输对所述第二链路的下行传输的干扰测量或所述第二链路的上行传输对所述第一链路的上行传输的干扰测量。
  6. 如权利要求1或2所述的方法，其特征在于，所述参考信号资源配置信息指示的参考信号资源关联有测量类型；其中，所述测量类型包括：所述第一链路的下行传输对所述第二链路的下行传输的干扰测量或所述第二链路的上行传输对所述第一链路的上行传输的干扰测量。
  7. 如权利要求1-6中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一设备向所述第二设备发送第一上报信息；所述第一上报信息用于指示所述第一设备是否具备多链路波束对应性能力；
    所述多链路波束对应性能力包括以下至少一项：
    所述第一设备在所述第一链路和第三链路上发送或接收具有准共址QCL关系的天线端口的参考信号的能力；
    所述第一设备在所述第一链路和第三链路上使用相同的波束或相同的空间滤波器发送或接收参考信号的能力；
    其中，所述第二设备与所述第一设备之间的链路为所述第三链路。
  8. 一种信号传输方法，其特征在于，包括：
    第二设备向第一设备发送参考信号资源配置信息；所述参考信号用于第一链路和第二链路之间的干扰测量；其中，所述第一链路为所述第一设备与第四设备之间的链路，所述第二链路为所述第二设备与第三设备之间的链路；所述第一设备、所述第二设备是所述第三设备和所述第四设备之间的中继节点；
    所述第二设备在所述参考信号资源配置信息指示的资源上发送或接收参考信号。
  9. 如权利要求8所述的方法，其特征在于，所述第二设备在所述参考信号资源配置信息指示的资源上发送或接收参考信号，包括：
    所述第二设备在所述第二链路上接收或发送所述参考信号。
  10. 如权利要求8或9所述的方法，其特征在于，还包括：所述第二设备向所述第一设备发送第一指示信息；
    所述第一指示信息用于指示以下至少一项：所述参考信号用于所述第一链路的下行传输对所述第二链路的下行传输的干扰测量，或所述第一设备在所述参考信号资源配置信息指示的参考信号资源上发送所述参考信号。
  11. 如权利要求8或9所述的方法，其特征在于，还包括：所述第二设备向所述第一设备发送第一指示信息；
    所述第一指示信息用于指示以下至少一项：所述参考信号用于所述第二链路的上行传输对所述第一链路的上行传输的干扰测量，或所述第一设备在所述参考信号资源配置信息指示的参考信号资源上接收所述参考信号。
  12. 如权利要求8-11中任一项所述的方法，其特征在于，所述参考信号资源配置信息中包含：所述参考信号对应的测量类型的指示信息；其中，所述测量类型包括：所述第一链路的下行传输对所述第二链路的下行传输的干扰测量或所述第二链路的上行传输对所述第一链路的上行传输的干扰测量。
  13. 如权利要求8或9所述的方法，其特征在于，所述参考信号资源配置信息指示的 参考信号资源关联有测量类型；其中，所述测量类型包括：所述第一链路的下行传输对所述第二链路的下行传输的干扰测量或所述第二链路的上行传输对所述第一链路的上行传输的干扰测量。
  14. 如权利要求8-13中任一项所述的方法，其特征在于，所述方法还包括：
    所述第二设备接收所述第一设备发送的第一上报信息；所述第一上报信息用于指示所述第一设备是否具备多链路波束对应性能力；
    所述多链路波束对应性能力包括以下至少一项：
    所述第一设备在所述第一链路和第三链路上发送或接收具有准共址QCL关系的天线端口的参考信号的能力；
    所述第一设备在所述第一链路和第三链路上使用相同的波束或相同的空间滤波器发送或接收参考信号的能力；
    其中，所述第二设备与所述第一设备之间的链路为所述第三链路。
  15. 一种通信装置，其特征在于，包括：
    第一通信单元，用于接收第二设备发送的参考信号资源配置信息；所述参考信号资源配置信息用于第一链路和第二链路之间的干扰测量；
    第二通信单元，用于在所述参考信号资源配置信息指示的资源上发送或接收参考信号；
    其中，所述第一链路为所述第一设备与第四设备之间的链路，所述第二链路为所述第二设备与第三设备之间的链路；所述第一设备、所述第二设备是所述第三设备和所述第四设备之间的中继节点。
  16. 如权利要求15所述的通信装置，其特征在于，所述第二通信单元，具体用于：根据所述参考信号资源配置信息在所述第一链路上发送或接收所述参考信号。
  17. 如权利要求15或16所述的通信装置，其特征在于，所述第一通信单元还用于接收所述第二设备发送的第一指示信息；所述第一指示信息用于指示以下至少一项：所述参考信号用于所述第一链路的下行传输对所述第二链路的下行传输的干扰测量，或所述第一设备在所述参考信号资源配置信息指示的资源上发送所述参考信号。
  18. 如权利要求15或16所述的通信装置，其特征在于，还包括：所述第一通信单元还用于接收所述第二设备发送的第一指示信息；所述第一指示信息用于指示以下至少一项：所述参考信号用于所述第二链路的上行传输对所述第一链路的上行传输的干扰测量，或所述第一设备在所述配置给所述参考信号资源配置信息指示的资源上接收所述参考信号。
  19. 如权利要求15-18中任一项所述的通信装置，其特征在于，所述参考信号资源配置信息包括：所述参考信号对应的测量类型的指示信息；其中，所述测量类型包括：所述第一链路的下行传输对所述第二链路的下行传输的干扰测量或所述第二链路的上行传输对所 述第一链路的上行传输的干扰测量。
  20. 如权利要求15或16所述的通信装置，其特征在于，所述参考信号资源配置信息指示的参考信号资源关联有测量类型；其中，所述测量类型包括：所述第一链路的下行传输对所述第二链路的下行传输的干扰测量或所述第二链路的上行传输对所述第一链路的上行传输的干扰测量。
  21. 如权利要求15-20中任一项所述的通信装置，其特征在于，所述第一通信单元还用于向所述第二设备发送第一上报信息；所述第一上报信息用于指示所述第一设备是否具备多链路波束对应性能力；
    所述多链路波束对应性能力包括以下至少一项：
    所述第一设备在所述第一链路和第三链路上发送或接收具有准共址QCL关系的天线端口的参考信号的能力；
    所述第一设备在所述第一链路和第三链路上使用相同的波束或相同的空间滤波器发送或接收参考信号的能力；
    其中，所述第二设备与所述第一设备之间的链路为所述第三链路。
  22. 一种通信装置，其特征在于，包括：
    第一通信单元，用于向第一设备发送参考信号资源配置信息；所述参考信号用于第一链路和第二链路之间的干扰测量；
    第二通信单元，用于在所述资源配置信息指示的资源上发送或接收参考信号；
    其中，所述第一链路为所述第一设备与第四设备之间的链路，所述第二链路为所述第二设备与第三设备之间的链路；所述第一设备、所述第二设备是所述第三设备和所述第四设备之间的中继节点。
  23. 如权利要求22所述的通信装置，其特征在于，所述第二通信单元，具体用于：在所述第二链路上接收或发送所述参考信号。
  24. 如权利要求22或23所述的通信装置，其特征在于，所述第一通信单元还用于向所述第一设备发送第一指示信息；所述第一指示信息用于指示以下至少一项：所述参考信号用于所述第一链路的下行传输对所述第二链路的下行传输的干扰测量，或所述第一设备在所述参考信号资源配置信息指示的资源上发送所述参考信号。
  25. 如权利要求22或23所述的通信装置，其特征在于，所述第一通信单元还用于向所述第一设备发送第一指示信息；所述第一指示信息用于指示以下至少一项：所述参考信号用于所述第二链路的上行传输对所述第一链路的上行传输的干扰测量，或所述第一设备在所述参考信号资源配置信息指示的的资源上接收所述参考信号。
  26. 如权利要求22-25中任一项所述的通信装置，其特征在于，所述参考信号资源配置信息中包含：所述参考信号对应的测量类型的指示信息；其中，所述测量类型包括：所述第一链路的下行传输对所述第二链路的下行传输的干扰测量或所述第二链路的上行传输对所述第一链路的上行传输的干扰测量。
  27. 如权利要求22或23所述的通信装置，其特征在于，所述参考信号资源配置信息指示的参考信号资源关联有测量类型；其中，所述测量类型包括：所述第一链路的下行传输对所述第二链路的下行传输的干扰测量或所述第二链路的上行传输对所述第一链路的上行传输的干扰测量。
  28. 如权利要求22-27中任一项所述的通信装置，其特征在于，所述第一通信单元还用于接收所述第一设备发送的第一上报信息；所述第一上报信息用于指示所述第一设备是否具备多链路波束对应性能力；
    所述多链路波束对应性能力包括以下至少一项：
    所述第一设备在所述第一链路和第三链路上发送或接收具有准共址QCL关系的天线端口的参考信号的能力；
    所述第一设备在所述第一链路和第三链路上使用相同的波束或相同的空间滤波器发送或接收参考信号的能力；
    其中，所述第二设备与所述第一设备之间的链路为所述第三链路。
  29. 一种通信系统，其特征在于，包括：第一设备、第二设备、第三设备和第四设备，所述第一设备、所述第二设备是所述第三设备和所述第四设备之间的中继节点，所述第一设备与第四设备之间的链路为第一链路，所述第二设备与第三设备之间的链路为第二链路，所述第二设备与所述第一设备之间的链路为第三链路；其中：
    所述第二设备向所述第一设备发送参考信号资源配置信息，所述参考信号用于第一链路和第二链路之间的干扰测量；
    所述第一设备接收所述第二设备发送的所述参考信号资源配置信息，并在所述参考信号资源配置信息指示的资源上发送或接收所述参考信号；所述参考信号对应的测量结果用于确定所述第一链路和所述第二链路之间的干扰。
  30. 一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行如权利要求1-14任意一项所述的方法。
PCT/CN2018/091109 2017-06-16 2018-06-13 信号传输方法、相关装置及系统 Ceased WO2018228443A1 (zh)

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