WO2021163942A1 - Procédé et appareil de mesure d'interférences - Google Patents

Procédé et appareil de mesure d'interférences Download PDF

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Publication number
WO2021163942A1
WO2021163942A1 PCT/CN2020/075912 CN2020075912W WO2021163942A1 WO 2021163942 A1 WO2021163942 A1 WO 2021163942A1 CN 2020075912 W CN2020075912 W CN 2020075912W WO 2021163942 A1 WO2021163942 A1 WO 2021163942A1
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WIPO (PCT)
Prior art keywords
node
reference signal
information
configuration information
configuration
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PCT/CN2020/075912
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English (en)
Chinese (zh)
Inventor
刘凤威
袁世通
邱晶
窦蕴甫
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华为技术有限公司
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Priority to PCT/CN2020/075912 priority Critical patent/WO2021163942A1/fr
Publication of WO2021163942A1 publication Critical patent/WO2021163942A1/fr

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • This application relates to the field of communication technology, and in particular to an interference measurement method and device.
  • the base station establishes a connection with the core network through optical fiber.
  • the deployment cost of optical fiber is very high.
  • the wireless relay node (RN) establishes a connection with the core network through a wireless backhaul link, which can save part of the fiber deployment cost.
  • the wireless relay node establishes a wireless backhaul link with one or more upper-level nodes, and accesses the core network through the upper-level nodes.
  • the wireless relay node can provide services for multiple subordinate nodes.
  • the upper node of the relay node may be a base station or another relay node; the lower node of the relay node may be a terminal device or another wireless relay node.
  • the IAB node in NR includes two parts of functions, the mobile terminal (Mobile Termination, MT) function and the Distributed Unit (DU).
  • the MT is used for the communication between the IAB node and the upper-level node
  • the DU is used for the communication between the IAB node and the lower-level node.
  • the link between the MT and the upper-level node is called the parent BackHaul link
  • the link between the DU and the lower-level IAB node is called the child BackHaul link
  • the DU and the subordinate terminal The link through which the device communicates is called an access link.
  • the lower-level backhaul link and the access link may be collectively referred to as the access link.
  • Both the backhaul link and the access link of the IAB node may transmit in both the uplink and downlink directions. Therefore, there may be multiple types of inter-link interference between multiple IAB nodes, or cross-link interference (cross-link interference).
  • link interference, CLI may deteriorate the communication quality of the backhaul link and the access link of the IAB node, resulting in a decrease in network throughput.
  • the CLI measurement of the NR protocol mainly considers the interference measurement between the UE and the UE in the dynamic TDD scenario, and does not apply to various CLI measurements in the IAB network.
  • This application provides an interference measurement method and device, which are used to implement various CLI measurements in an IAB network.
  • an embodiment of the present application provides an interference measurement method, the method includes: a first node receives first configuration information sent by a third node, the first configuration information is used to instruct the first node to perform interference measurement on the interfered link ,
  • the third node is the host node or the superior node of the first node;
  • the first node receives the first reference signal sent by at least one second node according to the first configuration information;
  • the first node is based on the first reference signal sent by the at least one second node Signal interference measurement.
  • An IAB network interference method is proposed in the embodiments of this application. By this method, interference measurement in the IAB network can be implemented.
  • RRM radio resource management
  • the first configuration information is also used to instruct the first node to perform interference measurement on the interfered link and then report it.
  • the first node when the first node receives the first reference signal sent by the at least one second node according to the first configuration information, it may select the receiving beam to receive the first reference signal sent by the at least one second node according to the first configuration information. Signal. Compared with the beam scanning method of receiving the reference signal, the above design can more accurately determine the device that interferes with the interfered link.
  • the first configuration information includes quasi-collocation (QCL) information of the first reference signal, and the quasi-QCL information includes the reference signal identifier of the interfered link.
  • QCL quasi-collocation
  • the first configuration information includes a measurement purpose configuration
  • the measurement purpose configuration is used to instruct the first node to perform interference measurement on the interfered link.
  • the first configuration information includes QCL information of the interfered link and measurement purpose configuration
  • the measurement purpose configuration is used to instruct the first node to perform interference measurement on the interfered link.
  • the first configuration information is contained in at least one of the following first configuration information: synchronization signal/physical broadcast channel block measurement configuration (SS/PBCH Block measurement timing configuration, SMTC); measurement target configuration; measurement Configuration; measurement report configuration.
  • SS/PBCH Block measurement timing configuration SS/PBCH Block measurement timing configuration, SMTC
  • measurement target configuration SS/PBCH Block measurement timing configuration
  • measurement Configuration measurement report configuration
  • the first reference signal is a synchronization signal/physical broadcast channel block synchronization signal broadcast channel block (synchronous signal/PBCH block, SSB) or channel state information reference signal (channel state information reference signal, CSI-RS) ) Or sounding reference signal (SRS) or demodulation reference signal (DMRS).
  • SSB synchronization signal/physical broadcast channel block synchronization signal broadcast channel block
  • CSI-RS channel state information reference signal
  • SRS sounding reference signal
  • DMRS demodulation reference signal
  • the first node after the first node performs interference measurement based on the first reference signal sent by at least one second node, the first node receives one or more of the at least one second node sent by the second node
  • the second reference signal is associated with the first reference signal.
  • the first node can determine the beam direction with smaller accuracy by performing interference measurement multiple times, thereby improving the accuracy of interference measurement.
  • the first node before the first node receives the second reference signal sent by one or more of the at least one second node, the first node reports the one or more second reference signals to the third node The identifier of the first reference signal sent by the second node.
  • the third node can configure the transmission of the second reference signal according to the identifier of the first reference signal.
  • the interfered link is the receive backhaul link, or the interfered link is the receive access link.
  • the first configuration information carries identification information, and the identification information is used to identify the interfered link.
  • the identification information includes at least one of the following information: node information of the fifth node, where the fifth node and the first node are the two end points of the interfered link; The beam information of the transmitting beam used by the five nodes when sending signals; the beam information of the corresponding beam of the interfered link.
  • the beam information includes at least one of the following information: quasi co-location information, transmission configuration indication TCI state, spatial relationship, and reference signal information.
  • the second reference signal is SSB or CSI-RS or SRS or DMRS.
  • the present application provides an interference measurement method, the method includes: a second node receives second configuration information sent by a fourth node, the second configuration information is used to configure the second node to send a first reference signal, and the fourth node Is the host node or superior node of the second node; the second node sends the first reference signal according to the second configuration information; the second node receives the third configuration information sent by the fourth node, and the third configuration information is used to configure the second node to send The second reference signal; the second node sends the second reference signal according to the third configuration information; wherein, the first reference signal and the second reference signal have an association relationship.
  • An embodiment of the application proposes an interference method for an IAB network, by which interference measurement in an IAB network can be implemented, and most parameters and processes of RRM can be used to implement CLI measurement in an IAB network in an embodiment of the application.
  • a beam direction with a smaller accuracy can be determined, so that the accuracy of interference measurement can be improved.
  • the third configuration information includes the identification of the first reference signal.
  • the second node can send the second reference signal in the beam direction corresponding to the first reference signal.
  • the second node before the second node receives the third configuration information sent by the fourth node, the second node reports to the fourth node the number of second reference signals associated with the first reference signal.
  • the fourth node can obtain a more accurate quantity value of the second reference signal.
  • At least one item of the second configuration information or the third configuration information carries identification information, and the identification information is used to identify the interference link.
  • the identification information includes at least one of the following information: node information of the sixth node, where the sixth node and the second node are two end points of the interference link; the second node receives the sixth node The beam information of the receiving beam used when the node sends the signal; the beam information of the beam corresponding to the interference link.
  • the beam information includes at least one of the following information: quasi co-location information, transmission configuration indication TCI state, spatial relationship, and reference signal information.
  • the first reference signal is SSB or CSI-RS or SRS or DMRS.
  • the second reference signal is SSB or CSI-RS or SRS or DMRS.
  • the first reference signal may be different from the second reference signal.
  • an embodiment of the present application provides an interference measurement method.
  • the method includes: a fourth node sends second configuration information to a second node, the second configuration information is used to configure the second node to send the first reference signal, and the fourth node Is the host node or superior node of the second node; the fourth node sends third configuration information to the second node, and the third configuration information is used to configure the second node to send the second reference signal; where the first reference signal and the second reference The signals are related.
  • An embodiment of the application proposes an interference method for an IAB network, by which interference measurement in an IAB network can be implemented, and most parameters and processes of RRM can be used to implement CLI measurement in an IAB network in an embodiment of the application.
  • a beam direction with a smaller accuracy can be determined, so that the accuracy of interference measurement can be improved.
  • the third configuration information includes the identification of the first reference signal.
  • the second node can send the second reference signal in the beam direction corresponding to the first reference signal.
  • the fourth node before the fourth node sends the third configuration information to the second node, the fourth node receives the identifier of the first reference signal reported by the first node. Through the above design, the fourth node can configure the transmission of the second reference signal according to the identifier of the first reference signal.
  • the fourth node before the fourth node sends the third configuration information to the second node, the fourth node receives the number of second reference signals that are associated with the first reference signal reported by the second node. Through the above design, the fourth node can obtain a more accurate quantity value of the second reference signal.
  • At least one item of the second configuration information or the third configuration information carries identification information, and the identification information is used to identify the interference link.
  • the identification information includes at least one of the following information: node information of the sixth node, where the sixth node and the second node are two end points of the interference link; the second node receives the sixth node The beam information of the receiving beam used when the node sends the signal; the beam information of the beam corresponding to the interference link.
  • the beam information includes at least one of the following information: quasi co-location information, transmission configuration indication TCI state, spatial relationship, and reference signal information.
  • the first reference signal is SSB or CSI-RS or SRS or DMRS.
  • the second reference signal is SSB or CSI-RS or SRS or DMRS.
  • the first reference signal may be different from the second reference signal.
  • the present application provides an interference measurement device, which may be a communication device, or a chip or chipset in the communication device, where the communication device may be the first node, or the second node or the fourth node .
  • the device may include a processing unit and a transceiving unit.
  • the processing unit may be a processor, and the transceiving unit may be a transceiver; the device may also include a storage module, and the storage module may be a memory; the storage module is used to store instructions, and the processing unit Execute the instructions stored in the storage module to make the first node execute the corresponding function in the first aspect, or the processing unit executes the instructions stored in the storage module to make the second node execute the corresponding function in the second aspect. Or, the processing unit executes the instructions stored in the storage module, so that the fourth node executes the corresponding function in the third aspect.
  • the processing unit can be a processor, and the transceiver unit can be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage module to Make the first node execute the corresponding function in the first aspect, or the processing unit executes the instructions stored in the storage module, so that the second node executes the corresponding function in the second aspect, or the processing unit executes the storage module
  • the stored instructions enable the fourth node to perform the corresponding function in the above-mentioned third aspect.
  • the storage module may be a storage module (for example, register, cache, etc.) in the chip or chipset, or a storage module (for example, read-only memory, random access memory, etc.) located outside the chip or chipset in the network device. Fetch memory, etc.).
  • an interference measurement device which includes a processor, a communication interface, and a memory.
  • the communication interface is used to transmit information, and/or messages, and/or data between the device and other devices.
  • the memory is used to store computer-executable instructions.
  • the processor executes the computer-executable instructions stored in the memory, so that the device executes any design in the first aspect or the first aspect, or the second aspect. The method described in any one of the aspects or the second aspect, or the second aspect or the second aspect.
  • this application also provides a computer-readable storage medium having instructions stored in the computer-readable storage medium, which when run on a computer, cause the computer to execute any one of the above-mentioned first aspect or the first aspect. Design, or the second aspect or any one of the second aspects, or any one of the second or second aspects, the method described.
  • the present application also provides a computer program product including instructions, which when run on a computer, cause the computer to execute any design in the first aspect or the first aspect, or the second aspect or the second aspect. Any design, or the second aspect or the method described in any of the second aspects.
  • the present application also provides a network system including a first node, a second node, and a fourth node, wherein the first node is used to implement the function of the first node in the method described in the first aspect above , The second node is used to implement the function of the second node in the method described in the second aspect, and the fourth node is used to implement the function of the second node in the method described in the third aspect.
  • a chip provided by the present application is coupled with a memory, and executes the first aspect and any possible design of the embodiments of the present application, or any design in the second aspect or the second aspect, or the first aspect.
  • the method described in either of the second aspect or the second aspect is designed.
  • Coupled in the embodiments of the present application means that two components are directly or indirectly combined with each other.
  • FIG. 1 is an architecture diagram of an IAB system provided by an embodiment of this application.
  • FIG. 2 is a specific example diagram of an IAB system provided by an embodiment of the application.
  • FIG. 3 is a schematic structural diagram of a gNB provided by an embodiment of the application.
  • FIG. 4 is a schematic structural diagram of another gNB provided by an embodiment of the application.
  • FIG. 5 is a schematic structural diagram of an IAB node provided by an embodiment of this application.
  • FIG. 6 is a schematic diagram of connection of an IAB system provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of an IAB node transceiver unit provided by an embodiment of this application.
  • FIG. 8 is a schematic diagram of CLI in an IAB network provided by an embodiment of this application.
  • FIG. 9 is a schematic flowchart of an interference measurement method provided by an embodiment of this application.
  • FIG. 10 is a schematic diagram of a beam scanning interference measurement provided by an embodiment of this application.
  • FIG. 11 is a schematic diagram of an interference measurement process provided by an embodiment of this application.
  • FIG. 12 is a schematic diagram of an interference measurement process provided by an embodiment of this application.
  • FIG. 13 is a schematic structural diagram of an interference measurement device provided by an embodiment of this application.
  • FIG. 14 is a schematic structural diagram of an interference measurement device provided by an embodiment of the application.
  • QCL Quasi-collocation
  • Quasi co-location can also be referred to as quasi co-location or co-location.
  • the signals corresponding to the antenna ports with the QCL relationship may have the same or similar spatial characteristic parameters (or called parameters), or the spatial characteristic parameters (or called parameters) of an antenna port may be used to determine the relationship with the antenna
  • the spatial characteristic parameter (or called the parameter) difference is smaller than a certain threshold.
  • the spatial characteristic parameters of two reference signals or channels satisfying the QCL relationship are the same (or similar or similar), so that the spatial characteristic parameters of the target reference signal can be inferred based on the source reference signal resource index.
  • the spatial characteristics of the two reference signals or channels that satisfy the spatial correlation information are the same (or similar or similar), so that the spatial characteristics of the target reference signal can be inferred based on the source reference signal resource index parameter.
  • the spatial characteristic parameters include one or more of the following parameters:
  • Angle of incidence AoA
  • dominant (dominant) incident angle AoA average incident angle
  • power angular spectrum PAS
  • exit angle angle of departure, AoD
  • main exit angle Average exit angle, power angle spectrum of exit angle
  • terminal device transmit beamforming terminal device receive beamforming, spatial channel correlation, network device transmit beamforming, network device receive beamforming, average channel gain, average channel delay (average delay), delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (doppler shift), spatial reception parameters (spatial Rx parameters), etc.
  • angles may be decomposition values of different dimensions, or a combination of decomposition values of different dimensions.
  • Network equipment can configure one or more types of QCL for terminal equipment at the same time, such as QCL type A+D, C+D:
  • QCL types A Doppler shift, Doppler spread, average delay, delay spread
  • the QCL relationship refers to the QCL relationship of type D
  • it can be considered as an airspace QCL
  • the antenna port meets the spatial QCL relationship, it can be the QCL relationship between the downlink signal port and the downlink signal port, or the QCL relationship between the uplink signal port and the uplink signal port (also called spatial relation), which can be two
  • the two signals have the same AoA or AoD, which is used to indicate that they have the same receiving beam or transmitting beam.
  • the AOA and AOD of the two signals may have a corresponding relationship, or the AOD and AOA of the two signals may have a corresponding relationship, that is, the beam can be used Reciprocity
  • the uplink transmit beam is determined according to the downlink receive beam
  • the downlink receive beam is determined according to the uplink transmit beam.
  • the signal transmitted on the port with the spatial QCL relationship can also be understood as using the same spatial filter to receive or transmit the signal.
  • the spatial filter may be at least one of the following: precoding, weight of the antenna port, phase deflection of the antenna port, and amplitude gain of the antenna port.
  • the signal transmitted on the port with the spatial QCL relationship can also be understood as having a corresponding beam pair link (BPL), and the corresponding BPL includes at least one of the following: the same downlink BPL, the same uplink BPL, and the downlink BPL The corresponding uplink BPL, the downlink BPL corresponding to the uplink BPL.
  • BPL beam pair link
  • the spatial reception parameter (ie, QCL of type D) can be understood as a parameter for indicating the direction information of the reception beam.
  • TCI Transmission configuration indicator
  • TCI is used to indicate the QCL information of a signal or channel.
  • the channel can be a physical downlink control channel (PDCCH)/control resource set (CORESET) or a physical downlink shared channel (PDSCH).
  • the signal may be a channel state information reference signal (channel state information reference signal, CSI-RS), a demodulation reference signal (demodulation reference signal, DMRS), a tracking reference signal (tracking reference signal, TRS), etc.
  • TCI information means that the reference signal included in the TCI satisfies the QCL relationship with the channel or signal. It is mainly used to indicate that when a signal or channel is received, its spatial characteristic parameters and other information are the same as the spatial characteristic parameters of the reference signal included in the TCI. Similar, similar.
  • a TCI state can be configured with one or more reference signals that are referenced, and the associated QCL type (QCL type).
  • QCL types can be divided into four categories: A/B/C/D, which are different combinations or choices of ⁇ Doppler shift, Doppler spread, average delay, delay spread, and spatial Rx parameter ⁇ .
  • the TCI status includes QCL information, or the TCI status is used to indicate QCL information.
  • Synchronous signal broadcast channel block (synchronous signal/PBCH block, SS/PBCH block):
  • SS/PBCH block can also be called SSB.
  • PBCH is the abbreviation of physical broadcast channel.
  • the SSB includes at least one of a primary synchronization signal (primary synchronization signal, PSS), a secondary synchronization signal (secondary synchronization signal, SSS), and a PBCH. It is mainly used for cell search, cell synchronization, and signals that carry broadcast information.
  • the communication systems mentioned in the embodiments of this application include, but are not limited to: narrowband-internet of things (NB-IoT) system, wireless local area network (wireless local access network, WLAN) system, long term evolution, LTE) systems, fifth generation mobile networks (5th generation wireless systems, 5G) or post 5G communication systems, such as new radio (NR) systems, device to device (D2D) Communication system, etc.
  • NB-IoT narrowband-internet of things
  • WLAN wireless local area network
  • LTE long term evolution
  • 5G fifth generation mobile networks
  • 5G fifth generation wireless systems
  • post 5G communication systems such as new radio (NR) systems, device to device (D2D) Communication system, etc.
  • An IAB system suitable for the technical solution of the present application includes at least multiple IAB hosts, and one or more terminal devices served by the IAB hosts, one or more relay nodes (ie, IAB nodes), and medium One or more terminal devices served by the relay node.
  • FIG. 1 shows an architecture diagram of an IAB system suitable for the technical solution of the present application.
  • an IAB system includes at least two base stations, namely base station 100 and base station 120.
  • the IAB system may also include a terminal device (terminal) 101 served by the base station 100, an IAB node 110, and a terminal device 111 served by the IAB node 110, where the IAB node 110 is connected to the base station 100 through a wireless backhaul link 113.
  • the IAB system may also include a terminal device 201 served by the base station 200, an IAB node 210, and a terminal device 211 served by the IAB node 210, where the IAB node 210 is connected to the base station 200 through a wireless backhaul link 213.
  • the base station 100 and the base station 200 are referred to as IAB hosts.
  • the IAB host is also referred to as a donor base station, a donor node, etc. in this application.
  • the IAB system may also include multiple other IAB nodes, for example, the IAB node 120, the IAB node 130, and the IAB node 220.
  • the IAB node 120 is connected to the IAB node 110 through a wireless backhaul link 123 to access the base station 100.
  • the IAB node 130 is connected to the IAB node 110 through a wireless backhaul link 133 to access the base station 100.
  • the IAB node 220 is connected to the IAB node 210 through a wireless backhaul link 223 to access the base station 200.
  • the IAB node 220 may also be connected to the IAB node 130 through a wireless backhaul link 231 to access the base station 100.
  • the IAB node 120 serves one or more terminal devices 121
  • the IAB node 130 serves one or more terminal devices 131
  • the IAB node 220 serves one or more terminal devices 221.
  • the wireless backhaul links are all viewed from the perspective of the relay node.
  • the wireless backhaul link 113 is the backhaul link of the IAB node 110
  • the wireless backhaul link 123 is the IAB node 120.
  • Backhaul link As shown in Figure 1, an IAB node, such as 120, can be connected to another IAB node 110 through a wireless backhaul link, such as 123, to connect to the network.
  • the relay node can be connected to the network via a multi-level wireless relay node.
  • FIG. 1 is only an exemplary illustration, the IAB system may include multiple IAB hosts, and the embodiments of this application do not specifically limit the number of IAB hosts, the number of IAB nodes, the number of UEs, etc. included in the IAB system. .
  • IAB nodes can generally refer to any node or device with a relay function.
  • the use of IAB nodes and relay nodes in this application should be understood to have similar meanings.
  • the base station 100 includes but is not limited to: evolved node B (evolved node base, eNB), radio network controller (RNC), node B (node B, NB), base station controller (base station controller, BSC) , Base transceiver station (base transceiver station, BTS), home base station (home evolved NodeB, or home node B, HNB), baseband unit (baseband Unit, BBU), evolved (evolved LTE, eLTE) base station, NR base station (next generation node B (gNB), next generation eNodeB (ng-eNB), etc.
  • eNB evolved node B
  • RNC radio network controller
  • node B node B
  • base station controller base station controller
  • BSC base station controller
  • Base transceiver station base transceiver station
  • BTS home base station
  • home evolved NodeB home evolved NodeB, or home node B, HNB
  • baseband unit baseband Unit
  • evolved LTE, eLTE base
  • Terminal equipment includes but is not limited to: user equipment (UE), mobile station, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile equipment, terminal, wireless communication equipment, user agent, Station (ST), cell phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (wireless local loop, WLL) station in wireless local area network (wireless local access network, WLAN), cell phone, cordless phone, Personal digital assistant (PDA), handheld devices with wireless communication functions, computing devices, other processing devices connected to wireless modems, in-vehicle devices, wearable devices, mobile stations in the future 5G network, and public Any of the terminal devices in the public land mobile network (PLMN) network.
  • UE user equipment
  • PLMN public land mobile network
  • the IAB node is a specific name of a relay node, which does not constitute a limitation to the solution of this application. It can be one of the aforementioned base stations or terminal devices with a forwarding function, or it can be an independent device form.
  • the IAB node of the present application may also be called a relay node (RN), a transmission and reception point (transmission and reception point), a relay transmission and reception point (relaying TRP), etc.
  • Access link The link between the IAB node and the terminal device directly served by the wireless link or the link between the IAB host and the terminal directly served by the wireless link.
  • the access link includes an uplink access link and a downlink access link.
  • the uplink access link is also referred to as the uplink transmission of the access link, and the downlink access link is also referred to as the downlink transmission of the access link.
  • Backhaul link the link between the IAB node and its superior node (ie, the IAB parent node). At this time, the IAB node serves as a subordinate node (ie, IAB child node) of its IAB parent node. It should be understood that the IAB parent node may be an IAB node or an IAB host. Data transmission from the IAB node to the IAB parent node is called uplink transmission on the backhaul link. The IAB node receiving the data transmission of the IAB parent node is called the downlink transmission of the backhaul link.
  • an IAB node in the integrated access and backhaul system shown in FIG. 1, an IAB node is connected to an upper-level node.
  • an IAB node such as 120
  • the IAB node 130 in Figure 1 also It may be connected to the IAB node 120 through the backhaul link 134, that is, both the IAB node 110 and the IAB node 120 are regarded as the upper node of the IAB node 130.
  • the names of the IAB nodes 110, 120, and 130 do not limit the scenarios or networks in which they are deployed, and may be any other names such as relay and RN. The use of the IAB node in this application is only for the convenience of description.
  • the wireless links 102, 112, 122, 132, 113, 123, 133, 134, 202, 213, 222, 223, 231 can be bidirectional links, including uplink and downlink transmission links.
  • the wireless backhaul link 113, 123, 133, 134, 213, 223, 231 can be used by the upper node to provide services for the lower node, such as the upper node 100.
  • the lower-level node 110 provides a wireless backhaul service.
  • the node is not limited to whether it is a network node or a terminal device.
  • the terminal device can act as a relay node to serve other terminal devices.
  • the wireless backhaul link can be an access link in some scenarios.
  • the backhaul link 123 can also be regarded as an access link to the node 110, and the backhaul link 113 is also the access link of the node 100. link.
  • the above-mentioned upper-level node may be a base station or a relay node
  • the lower-level node may be a relay node or a terminal device with a relay function.
  • the lower-level node may also be a terminal device.
  • Figure 2 is a specific example of the IAB system.
  • the IAB system shown in FIG. 2 it includes a donor base station, IAB node 1, IAB node 2, UE1 and UE2.
  • the link between the donor base station and the IAB node 1 and the link between the IAB node 1 and the IAB node 2 are backhaul links.
  • the link between UE1 and the donor base station and the link between UE2 and IAB node 1 are access links.
  • the IAB host in the embodiment of the present application may be divided into a centralized unit (CU) and at least one distributed unit (DU).
  • the CU as a logical node in the 5G gNB, can be used to manage or control at least one DU, and it can also be referred to as a CU connected to at least one DU.
  • This structure can split the protocol layer of the wireless access network equipment in the communication system, in which part of the protocol layer functions are placed in the CU, and the remaining part of the protocol layer functions are distributed in the DU, and the CU centrally controls the DU.
  • the protocol layer of gNB includes the radio resource control (radio resource control, RRC) layer, the service data adaptation protocol (SDAP) layer, and the packet data convergence protocol (packet data).
  • the convergence protocol (PDCP) layer the radio link control (RLC) layer, the media access control sublayer (media access control, MAC) layer, and the physical layer.
  • the CU may be used to implement the functions of the RRC layer, the SDAP layer, and the PDCP layer
  • the DU may be used to implement the functions of the RLC layer, the MAC layer, and the physical layer.
  • the embodiment of this application does not specifically limit the protocol stack included in the CU and DU.
  • CU and DU can be defined and connected by the F1AP interface protocol.
  • the structure of gNB may be as shown in FIG. 3.
  • the CU in the embodiment of the present application may be further divided into a control plane (CU-control plane, CU-CP) network element and at least one user plane (CU-user plane, CU-UP) network element.
  • CU-CP can be used for control plane management
  • CU-UP can be used for user plane data transmission.
  • the application protocol layer (application protocol, AP) interface between the CU-CP and the CU-UP may be an E1 port.
  • the application protocol layer interface between CU-CP and DU can be F1-C, which is used for the transmission of control plane signaling.
  • the application protocol layer interface between CU-UP and DU can be F1-U, which is used for user plane data transmission.
  • CU-UP and CU-UP can communicate through the application protocol layer Xn-U interface for user plane data transmission.
  • the structure of gNB may be as shown in FIG. 4.
  • the IAB node can be configured as a DU
  • the IAB host can be configured as a CU.
  • the IAB node is composed of two parts: a mobile terminal (MT) and a DU.
  • the MT function can be understood as a logical module similar to the UE.
  • the MT is called a function (or module) that resides on the IAB node. Since the MT is similar to the function of an ordinary UE, it can be considered that the IAB node accesses the upper node or the IAB host through the MT.
  • the DU function is the same as the DU of a normal base station, and can be understood as a logic module similar to a base station.
  • IAB In IAB, DU is called a function (or module) that resides on the IAB node. Since the DU is similar to the function or part of the function of an ordinary base station, it can be considered that the IAB node can allow the access of lower-level nodes and terminal equipment through the DU.
  • the application protocol layer interface between the IAB host CU and the IAB node DU is the F1 interface
  • the air interface between the IAB host DU or the IAB node DU and the downstream IAB node MT is the Uu interface, as shown in FIG. 6. It should be understood that the backhaul link communication between the IAB node and the IAB host is based on the Uu interface to realize the F1 interface communication at the application protocol layer.
  • Both the MT and DU of the IAB node have a complete transceiver unit, and there is an interface between the two.
  • MT and DU are logical modules. In practice, they can share some sub-modules, for example, they can share transceiver antennas, baseband processing units, etc., as shown in Figure 7.
  • a base station when a base station performs downlink transmission, neighboring base stations may perform uplink reception.
  • two types of CLI interference may occur in the network:
  • the existing NR protocol only standardizes the interference measurement between the UE and the UE, and the interference measurement between the base station and the base station is reserved for equipment vendors to implement.
  • the interference measurement between the UE and the UE is performed through SRS.
  • the potentially interfering UE performs SRS transmission under the scheduling of the base station, and the potentially interfered UE is configured with the SRS-based interference measurement process.
  • the CLI measurement of NR mainly considers the interference measurement between UE and UE in the dynamic TDD scenario.
  • the IAB network has two types of links, backhaul and access, there are more complex inter-link interferences in the IAB network.
  • the following four types of inter-link interference may occur in the IAB network:
  • Case 2 The interference of DU transmission to MT reception, as shown in Figure 8 (b);
  • the interference measurement mechanism between the UE and the UE cannot be adapted to measure various CLIs in the IAB network.
  • the embodiments of the present application provide an interference measurement method and device, which are used to implement various CLI measurements in an IAB network.
  • the method and the device are based on the same technical concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • At least one refers to one or more, and “multiple” refers to two or more than two.
  • “And/or” describes the association relationship of the associated object, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one (item) or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • At least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c It can be single or multiple.
  • the IAB node is a specific name of a relay node, which does not constitute a limitation to the solution of this application. It can be one of the aforementioned base stations or terminal devices with a forwarding function, or it can be an independent device form.
  • the IAB node of the present application may also be called a relay node (RN), a transmission and reception point (transmission and reception point), a relay transmission and reception point (relaying TRP), etc.
  • the third node sends first configuration information to the first node, where the first configuration information is used to instruct the first node to perform interference measurement on the interfered link, and the third node is a host node or an upper-level node of the first node.
  • the first node receives the first configuration information sent by the third node.
  • the first configuration information may also be understood as being used to configure the first node to perform interference measurement and report on the interfered link.
  • the first node may be an IAB node, or a common base station or UE.
  • the interfered link may be a receiving backhaul link, or it may be understood as a link received by the MT.
  • the interfered link is the receiving access link, which can also be understood as the link receiving the DU.
  • the first reference signal may be SSB or CSI-RS or sounding reference signal (SRS) or DMRS.
  • SRS sounding reference signal
  • DMRS DMRS
  • the first configuration information may include QCL information of the first reference signal, and the quasi-QCL information includes the reference signal identifier of the interfered link.
  • the configuration information may include the TCI state configuration of the first reference signal.
  • the QCL information of the first reference signal may be indicated by the reference signal identifier of the reference signal received or sent by the first node, and the reference signal may be sent or received by the upper node of the first node, such as SS/PBCH index. , CSI-RS resource identifier, SRS resource identifier, etc.
  • the first configuration information may also include a measurement purpose configuration, and the measurement purpose configuration is used to instruct the first node to perform interference measurement on the interfered link.
  • the configuration information may include a measurement purpose, and the measurement purpose may include the first parameter.
  • the measurement purpose may be used to instruct the first node to perform interference measurement on the interfered link.
  • the measurement purpose may also be the second parameter, and when the measurement purpose includes the second parameter, the measurement purpose may be used to instruct the first node to perform RRM measurement.
  • the measurement purpose when the first parameter is defaulted, the measurement purpose may be used to instruct the first node to perform RRM measurement, that is, the RRM measurement may be the default measurement purpose.
  • the first configuration information may include QCL information of the interfered link and a measurement purpose configuration, and the measurement purpose configuration is used to instruct the first node to perform interference measurement on the interfered link.
  • the first configuration information may be included in at least one of the following configuration information:
  • Synchronization signal/physical broadcast channel block measurement configuration (SS/PBCH Block measurement timing configuration, SMTC);
  • CSI-RS-ResourceConfigMobility Mobility measurement CSI-RS configuration
  • Measurement configuration (measurement configuration, MeasConfig);
  • Measurement report configuration (reporting configuration, reportConfig).
  • the first configuration information may be included in the MO.
  • the configuration information element (information element, IE) of the MO may be as follows:
  • the first configuration information may be included in MeasConfig.
  • the configuration information element of MeasConfig may be as follows:
  • the quasi-QCL information includes the reference signal identifier of the interfered link.
  • the QCL information of the interfered link and the measurement purpose configuration may be included in different configuration information.
  • the QCL information of the interfered link may be included in the MO, and the measurement purpose configuration may be included in the MeasConfig.
  • the QCL information of the first reference signal may be indicated by the reference signal identifier of the reference signal received or sent by the first node, and the reference signal may be sent or received by the upper node of the first node, such as SS/PBCH index. , CSI-RS resource identifier, SRS resource identifier, etc.
  • the first configuration information implicitly indicates the measurement purpose, or the first configuration information implicitly indicates the QCL information for interference measurement.
  • the first configuration information indicates the identifier of the interfered link, and when the first node receives the identifier of the interfered link, the foregoing interference measurement is performed.
  • the interfered link can be identified in the following ways: upper-level node identifier, serving cell ID identifier, cell PCI, UE identifier, RNTI identifier, MT identifier, subordinate node identifier, etc.
  • the third node may also configure the interference measurement report configuration for the interference measurement report for the interfered link for the first node.
  • This interference measurement report configuration instructs the first node to perform interference measurement. At this time, the first node reuses some or all of the RRM measurement parameters when performing interference measurement.
  • the third node may also configure RRM measurement to the first node.
  • RRM measurement For example, SMTC, MO, MeasConfig or reportConfig, etc. may include RRM measurement configuration information. That is, the CLI and RRM measurement performed by the first node can share part of the configuration information.
  • the first node can select a suitable beam for interference measurement. For example, suppose that the first configuration information includes QCL information of the first reference signal, and the quasi-QCL information includes the reference signal identifier of the interfered link.
  • the first node may select a beam having a QCL relationship with the interfered link to perform interference measurement.
  • the first configuration information may carry first identification information, and the first identification information is used to identify the interfered link.
  • the first identification information may include at least one of the following information: node information of the fifth node, beam information of the transmission beam used when the first node sends a signal to the fifth node, and the link corresponding to the interference The beam information of the beam, where the fifth node and the first node are two end points of the interfered link.
  • the fifth node may be an upper node of the first node, and the first identification information may include at least one of the following information: node information of the fifth node, the first node The beam information of the transmitting beam used when the MT of one node transmits a signal, and the beam information of the receiving beam used when the MT of the first node receives the signal.
  • the spatial filter for the MT of the first node to receive the first reference signal is the same as the spatial filter for the MT to send the signal to the fifth node. .
  • the first identification information includes the beam information of the receiving beam when the MT of the first node receives, it can be understood as a spatial filter for the MT of the first node to receive the first reference signal and a spatial filter for the MT to receive the signal sent by the fifth node same.
  • the fifth node may be a subordinate node of the first node, such as a terminal device, and the first identification information may include at least one of the following information: The node information, the beam information of the transmitting beam when the DU of the first node sends a signal, and the beam information of the receiving beam when the DU of the first node receives a signal.
  • the spatial filter for the MT of the first node to receive the first reference signal is the same as the spatial filter for the DU to send the signal to the fifth node. .
  • the first identification information includes the beam information of the receiving beam when the DU of the first node is received, it can be understood as a spatial filter for the MT of the first node to receive the first reference signal and a spatial filter for the DU to receive the signal sent by the fifth node same.
  • the beam information may include at least one of the following information: QCL information, TCI state, spatial relationship (spatialRelationInfo), and reference signal information.
  • the node information of the fifth node may be, but is not limited to, node identification, interfered cell or cell group information, and so on.
  • the node identifier may be the identifier of the superior node corresponding to the interfered link.
  • the node identifier may be the identification of the terminal device corresponding to the interfered link.
  • the node identification may be a node number, cell ID, cell physical ID, RNTI, cell group identification, etc.
  • the first node may need to measure the interference on multiple interfered links, where the multiple interfered links may respectively correspond to multiple upper-level nodes and/or lower-level nodes. Therefore, through the above method, it is possible to distinguish the interference measurement on different interfered links in the multi-link scenario.
  • the first configuration information may include The node identifier of the first upper-level node indicates that the link between the first upper-level node and the first node is the interfered link to be measured; the first configuration information may include the node identifier of the second upper-level node, indicating the second upper-level node The link with the first node is the interfered link to be measured, so that the first node can distinguish the first configuration information of the two upper-level nodes, so that it can choose when measuring the interference on the corresponding links of the two upper-level nodes The right beam.
  • the first node receives, according to the first configuration information, a first reference signal sent by at least one second node.
  • the second node may be an IAB node, or may be a common base station or UE.
  • the second node is an IAB node as an example.
  • the first node may select an appropriate beam according to the first configuration information, for example, select a beam corresponding to the interfered link as a receiving beam to receive the first reference signal sent by at least one second node.
  • the beam corresponding to the interfered link is used to receive the reference signal, which can more accurately determine the device that interferes with the interfered link.
  • the first node when measuring the interference on the receive backhaul link of the first node, can use the beam corresponding to the receive backhaul link to receive the first reference signal sent by at least one second node, so that the The interference received in the beam direction corresponding to the transmission link.
  • the determined high-interference beam may not necessarily be a beam that causes high interference to the first node's reception.
  • the IAB node 1 receives the reference signals of the IAB node 2 and the IAB node 3 when the reference signal is received in the beam scanning mode, and the received signal strength of the IAB node 2 is greater.
  • the receiving beam used by the IAB node 1 when measuring the signal strength of the IAB node 3 is closer to the beam used by the IAB node 3 to receive the backhaul link. Therefore, the IAB node 3 interferes more with the MT reception of the IAB node 1.
  • the first node can select the beam received by the MT as the reference signal of the IAB node 2 and the IAB node 3, so that it can be more accurately determined that the IAB node 3 interferes with the interfered link. equipment.
  • the first node performs interference measurement based on the first reference signal sent by the at least one second node.
  • the first node can measure the signal quality of the interfered link and the signal quality of the first reference signal sent by each second node, and according to the signal quality of the interfered link and the signal quality of each second node
  • the signal quality of the first reference signal determines the nodes and beams that cause greater interference to the interfered link. For example, when the difference between the signal quality value of the interfered link minus the signal quality value of the first reference signal is less than the threshold value, it can be considered that the first reference signal causes greater interference to the interfered link.
  • the parameter used to characterize signal quality can be but not limited to reference signal received power (RSRP), and the parameter used to characterize signal quality can be, but not limited to reference signal received quality (RSRP). ).
  • RSRP reference signal received power
  • RSRP reference signal received quality
  • the first node MT measures that the RSRP of the first reference signal sent by node i is RSRP_i, and records the superior node of the first node as node 0.
  • RSRP_i the difference of RSRP_0 minus RSRP_i is less than the threshold, it can be considered that node i Interference will occur when the first node receives the backhaul link.
  • the first node may send report information to the third node after performing interference measurement based on the first reference signal sent by at least one second node.
  • the first node reports the interference measurement result.
  • the first node reports the interference measurement result.
  • the first node reports several measurement results with the largest RSRP_i and the corresponding node identifier i.
  • the first node may carry the above-mentioned first identification information in the reported information.
  • the interfered link as the receiving backhaul link as an example
  • the first node includes two upper-level nodes
  • the first node uses different beams to measure the interference on the corresponding links of different upper-level nodes
  • the first-level node reports information
  • the node identifier of the first upper-level node may be included in the first upper-level node
  • the report information of the second upper-level node may include the node identifier of the second upper-level node, so that the third node can distinguish the reported information of the two upper-level nodes.
  • An IAB network interference method is proposed in the embodiments of this application. By this method, interference measurement in the IAB network can be implemented. In addition, most of the parameters and parameters of radio resource management (RRM) can be used in the embodiments of this application. The process realizes the CLI measurement in the IAB network.
  • RRM radio resource management
  • the first node may also repeat the interference measurement.
  • the beam for sending data by the second node may not completely overlap with the beam for sending the first reference signal.
  • the beam for sending data is narrower than the beam for sending the first reference signal.
  • the first node can repeat interference measurement. Improve the accuracy of interference measurement, so that the interference beam can be determined more accurately.
  • the first node may receive the second reference signal sent by one or more of the at least one second node, and Perform interference measurement according to the second reference signal sent by the one or more second nodes.
  • the second reference signal has an associated relationship with the first reference signal, for example, the second reference signal has a QCL relationship with the first reference signal.
  • the second reference signal may be SSB or CSI-RS or SRS or DMRS.
  • the second reference signal may also be other, which will not be listed here.
  • the second reference signal may be different from the first reference signal.
  • the beam for transmitting the second reference signal has a narrower width than the beam for transmitting the first reference signal.
  • the interference measured by the first node is the interference of the second node sending the first reference signal beam.
  • the second node may use the same The beams with different signal beams perform downlink channel and signal transmission such as PDSCH.
  • the second node may further send a second reference signal, and the first node may perform a corresponding second reference signal interference measurement.
  • the second node may send the first reference signal according to the second configuration information sent by the fourth node when sending the first reference signal, and the second configuration information is used to configure the second node to send the first reference signal.
  • the sending may be performed according to the third configuration information sent by the fourth node, and the third configuration information is used to configure the second node to send the second reference signal.
  • the third configuration information may include the identifier of the first reference signal.
  • the fourth node is a host node or an upper-level node of the second node. In an example, when the second node and the first node access the same host node or access the same upper-level node, the fourth node and the third node may be the same node.
  • the second configuration information and/or the third configuration information may carry second identification information, and the second identification information is used to identify the interference link.
  • the second identification information may include at least one of the following information: node information of the sixth node, beam information of the receiving beam used when the second node receives the signal sent by the sixth node, interference link location The beam information of the corresponding beam, where the sixth node and the second node are two end points of the interference link.
  • the sixth node may be an upper-level node of the second node, and the second identification information may include at least one of the following information: node information of the sixth node, second The beam information of the transmission beam used when the MT of the node transmits a signal, and the beam information of the reception beam used when the MT of the second node receives the signal.
  • the spatial filter for the DU of the second node to send the reference signal is the same as the spatial filter for the MT to send the signal to the sixth node.
  • the second identification information includes the beam information of the receiving beam when the MT of the second node receives the MT, it can be understood that the spatial filter for the DU of the second node to send the reference signal is the same as the spatial filter for the MT to receive the signal from the sixth node.
  • the sixth node may be a subordinate node of the second node, such as a terminal device, and the second identification information may include at least one of the following information: the node of the sixth node Information, the beam information of the transmitting beam when the DU of the second node sends a signal, and the beam information of the receiving beam when the DU of the second node receives a signal.
  • the spatial filter for sending the reference signal by the DU of the second node is the same as the spatial filter for sending the signal to the sixth node by the DU.
  • the spatial filter for the DU of the second node to send the reference signal is the same as the spatial filter for the DU to receive the signal from the sixth node.
  • the beam information may include at least one of the following information: QCL information, TCI state, spatialRelationInfo, and reference signal information.
  • the node information of the sixth node is similar to the node information of the above-mentioned fifth node, and the repetition is not repeated here.
  • the first node may report the identification of the first reference signal sent by the one or more second nodes to the third node. Therefore, the fourth node can configure the third configuration information for the one or more second nodes according to the identifier. Wherein, if the fourth node and the third node are the same node, the fourth node may receive the identifier reported by the first node, so that the third configuration information may be configured according to the identifier. If the fourth node and the third node are different nodes, the fourth node may obtain the identifier from the third node, so that the third configuration information may be configured according to the identifier.
  • the first node may report the one or more second node identifiers and the second node's transmission when the first reference signal sent by the one or more second nodes has greater interference to the interfered link.
  • the identification of the first reference signal For example, suppose that the first node MT measures that the RSRP of the first reference signal sent by node i is RSRP_i, and records the superior node of the first node as node 0. When the difference of RSRP_0 minus RSRP_i is less than the threshold, it can be considered that node i It will cause greater interference to the first node to receive the backhaul link, and thus report the identity of node i and the first reference signal sent by node i to the third node.
  • the beam for sending the first reference signal by the second node is different from the beam for sending the second reference signal, and due to the difference in beam width and beam direction, one beam for sending the first reference signal may correspond to multiple beams.
  • the beam for transmitting the second reference signal, or one first reference signal resource may correspond to multiple second reference signal resources.
  • multiple second reference signal resources such as M, may be configured for the second node, where M is greater than or equal to 1.
  • An integer that is, the third configuration information may be used to instruct the second node to send M second reference signals, or the third configuration information may configure M second reference signal sending resources for the second node.
  • the configuration information of the M second reference signal resources includes the associated first reference signal information, and the first reference signal may be an SSB, that is, the third configuration information may carry an SSB identifier.
  • the second node may send M transmission beams of the second reference signal that are close to the transmission beam of the first reference signal.
  • the sending beams of the M second reference signals may include beams that may be used by the second node to transmit the PDSCH.
  • the value of M may be the number of fixed split beams of the transmission beam of the first reference signal, that is, the transmission beam of the first reference signal of the second node can always be split into M beams. Since the PDSCH of the second node may use one or more of these M beams, the beam that interferes with the interfered link can be determined more accurately through the above method.
  • the value of M may not be fixed.
  • the second node may have a different value of M according to the scheduling situation.
  • different first reference signals correspond to different values of M, and in another possible implementation, different first reference signals correspond to the same value of M.
  • the fourth node before the second node receives the third configuration information sent by the fourth node, it may also report the number of second reference signals associated with the first reference signal to the fourth node. Therefore, the fourth node can configure the third configuration information according to the number. For example, if the number of second reference signals that are associated with the first reference signal reported by the second node is K, the third configuration information can be used to configure the first reference signal.
  • the two nodes send M second reference signals.
  • the value of M can be less than or equal to K.
  • the second node may only report one value of K, and any SSB of the second node corresponds to K CSI-RS resources.
  • the second node may determine the K value corresponding to the first reference signal according to the identifier of the first reference signal, so as to report the K value corresponding to the first reference signal to the fourth node.
  • the value of K corresponding to the same SSB may change, so the second node may update and report the value of K corresponding to the first reference signal.
  • the fourth node may configure several first reference signal identifiers for the second node. When the value of K corresponding to the configured first reference signal identifier changes, the second node may update and report the K corresponding to the first reference signal identifier. The value of.
  • the third node can configure the first node to perform the corresponding second reference signal measurement, and the second reference signal measurement
  • the configuration can be similar to the measurement configuration method of the first reference signal, and the repetition is not repeated here.
  • the configuration information may carry information of the associated first reference signal, such as the identifier of the first reference signal.
  • the fourth node may send configuration information, such as first configuration information, second configuration information, etc., to the second node through interface signaling such as F1-AP, or air interface signaling such as RRC.
  • interface signaling such as F1-AP
  • RRC air interface signaling
  • the third node may send configuration information, such as first configuration information, to the first node through interface signaling such as F1-AP, or air interface signaling such as RRC.
  • interface signaling such as F1-AP
  • RRC air interface signaling
  • the first reference signal may be SSB or CSI-RS or sounding reference signal (SRS) or DMRS.
  • SRS sounding reference signal
  • DMRS DMRS
  • the fourth node can reuse the existing SSB transmission configuration (SSB transmission configuration, STC) configuration.
  • SSB transmission configuration STC
  • the DU of the IAB node 2 when the MT of the IAB node 1 receives a downlink signal from an upper-level node, the DU of the IAB node 2 is sending a downlink signal for a lower-level node (such as a UE or a lower-level IAB node). Therefore, the DU transmission of the IAB node 2 may interfere with the MT reception of the IAB node 1.
  • a lower-level node such as a UE or a lower-level IAB node
  • Example 1 Based on the scenario shown in (b) in Figure 8, the interference measurement process can be as shown in Figure 11:
  • S1101 The host node sends second configuration information to the IAB node 2.
  • the second configuration information tool can refer to the above related description, which will not be repeated here.
  • S1103 The host node sends first configuration information to the IAB node 1.
  • the first configuration information tool can refer to the above related description, which will not be repeated here.
  • the IAB node 1 receives the first reference signal sent by the IAB node 2 according to the first configuration information, and performs interference measurement.
  • the IAB node 1 may select an appropriate beam to receive the first reference signal sent by the IAB node 2 according to the first configuration information. For example, the IAB node 1 may select the beam corresponding to the MT receiving link as the receiving beam to receive the first reference signal sent by the IAB node 2 according to the first configuration information.
  • step S904 For the process of the IAB node 1 performing interference measurement on the first reference signal, reference may be made to the related description of step S904 above, and details are not repeated here.
  • S1105 The IAB node 1 reports the interference measurement result to the host node.
  • steps S1106 and S1107 may be executed after step S1105.
  • S1106 The host node performs CLI management between IAB nodes based on the interference measurement result reported by the IAB node 1.
  • S1107 The host node sends interference management information to the IAB node 2.
  • Example 2 Based on the scenario shown in (b) in Figure 8, taking the first reference signal as SSB and the second reference signal as CSI-RS as an example, the interference measurement process can also be as shown in Figure 12:
  • steps S1201 to S1204 please refer to steps S1101 to S1104, where the first reference signal in steps S1201 to S1204 may be SSB, and other repetitions will not be repeated here.
  • the IAB node 1 reports the identity of the SSB1 to the host node.
  • SSB1 may be one of the SSBs sent by IAB node 2 that causes greater interference to the MT reception of IAB node 1.
  • the signal quality of the signal received by the MT of IAB node 1 minus the signal quality of SSB1 is greater than the threshold. .
  • S1206 The host node triggers the IAB node 2 to report the number of CSI-RS associated with SSB1.
  • step S1206 There is no strict sequence between step S1206 and step S1205.
  • Step S1205 can be executed first and then step S1206, or step S1206 can be executed first and then step S1205, or steps S1205 and S1206 can be executed simultaneously.
  • the IAB node 2 reports to the host node that the number of CSI-RS associated with SSB1 is K, and K is an integer greater than or equal to 1.
  • the host node sends third configuration information to the IAB node 2, where the third configuration information is similar to the second configuration information, except that the third configuration information is used to configure M CSI-RS transmissions, and the second configuration information is used to SSB transmission is configured, and the third configuration information may carry the identifier of SSB1, and the repetition will not be repeated.
  • M is an integer greater than or equal to 1.
  • M can be less than or equal to K.
  • the IAB node 2 sends M CSI-RSs.
  • the host node sends fourth configuration information to the IAB node 1, where the fourth configuration information is used to configure the IAB node 1 to perform CSI-RS interference measurement on the interfered link.
  • step S1205 can be performed first and then step S1210, or step S1210 can be performed first and then step S1205, or steps S1205 and S1210 can be performed simultaneously.
  • the IAB node 1 performs interference measurement based on M CSI-RSs.
  • the process of IAB node 1 performing interference measurement based on M CSI-RS is similar to step S1104, except that the reference signal measured by S1204 is SSB, and the reference signal measured by S1211 is CSI-RS.
  • the embodiment of the present application provides an interference measurement device.
  • the structure of the resource indicating device may be as shown in FIG. 13, including a communication unit 1301 and a processing unit 1302.
  • the interference measurement device may be specifically used to implement the method executed by the first node in the embodiments of FIG. 9 to FIG. 12.
  • the device may be the first node itself, or the chip or chip in the first node. A part of a group or chip used to perform related method functions.
  • the communication unit 1301 is configured to receive first configuration information sent by a third node, the first configuration information is used to instruct the first node to perform interference measurement on the interfered link, and the third node is the host node or superior of the first node node.
  • the processing unit 1302 is configured to receive the first reference signal sent by the at least one second node through the communication unit 1301 according to the first configuration information; and perform interference measurement based on the first reference signal sent by the at least one second node.
  • the first configuration information includes QCL information of the first reference signal, and the QCL information includes the reference signal identifier of the interfered link.
  • the first configuration information includes a measurement purpose configuration
  • the measurement purpose configuration is used to instruct the first node to perform interference measurement on the interfered link.
  • the first configuration information is included in at least one of the following first configuration information: SMTC; measurement target configuration; measurement configuration; measurement report configuration.
  • the first reference signal is SSB or CSI-RS or SRS or DMRS.
  • the communication unit 1301 may be further configured to: after the processing unit 1302 performs interference measurement based on the first reference signal sent by the at least one second node, receive a second reference sent by one or more of the at least one second node Signal, the second reference signal has an associated relationship with the first reference signal.
  • the communication unit 1301 may be further configured to: before receiving the second reference signal sent by the one or more second nodes, report the identification of the first reference signal sent by the one or more second nodes to the third node.
  • the interfered link is a receive backhaul link, or the interfered link is a receive access link.
  • the first configuration information carries identification information, and the identification information is used to identify the interfered link.
  • the identification information includes at least one item of the following information: node information of a fifth node, where the fifth node and the first node are two end points of the interfered link; the first node The beam information of the sending beam used when sending a signal to the fifth node; the beam information of the beam corresponding to the interfered link, where the fifth node and the first node are two end points of the interfered link.
  • the beam information includes at least one of the following information: quasi co-location information, TCI state, spatial relationship, and reference signal information.
  • the interference measurement device may be specifically used to implement the method executed by the second node in the embodiments of FIG. 9 to FIG. 12.
  • the device may be the second node itself, or the chip or chip in the second node. A part of a group or chip used to perform related method functions.
  • the communication unit 1301 is configured to send and receive signals; the processing unit 1302 is configured to perform through the communication unit 1301: receiving second configuration information sent by the fourth node, and the second configuration information is used to configure the second node to send the first reference signal,
  • the fourth node is the host node or superior node of the second node; sends the first reference signal according to the second configuration information; receives the third configuration information sent by the fourth node, and the third configuration information is used to configure the second node to send the second reference Signal; send the second reference signal according to the third configuration information; wherein, the first reference signal and the second reference signal have an association relationship.
  • the third configuration information includes the identifier of the first reference signal.
  • the processing unit 1302 may be further configured to: before receiving the third configuration information sent by the fourth node through the communication unit 1301, report to the fourth node the number of second reference signals associated with the first reference signal.
  • At least one item of the second configuration information or the third configuration information carries identification information, and the identification information is used to identify the interference link.
  • the identification information includes at least one item of the following information: node information of a sixth node, where the sixth node and the second node are two end points of the interference link;
  • the beam information of the corresponding beam of the interference link is the beam information of the corresponding beam of the interference link.
  • the beam information includes at least one of the following information: quasi co-location information, TCI state, spatial relationship, and reference signal information.
  • the interference measurement device may be specifically used to implement the method executed by the fourth node in the embodiments of FIG. 9 to FIG. 12.
  • the device may be the fourth node itself, or the chip or chip in the fourth node. A part of a group or chip used to perform related method functions.
  • the communication unit 1301 is used to send and receive signals; the processing unit 1302 is used to perform through the communication unit 1301: send second configuration information to the second node, the second configuration information is used to configure the second node to send the first reference signal,
  • the four node is the host node or the upper node of the second node; sends third configuration information to the second node, and the third configuration information is used to configure the second node to send the second reference signal; wherein, the first reference signal and the second reference signal Have an association relationship.
  • the third configuration information includes the identifier of the first reference signal.
  • the processing unit 1302 may be further configured to: before sending the third configuration information to the second node through the communication unit 1301, receive the identifier of the first reference signal reported by the first node through the communication unit 1301, where the first node is the The victim node of the second node.
  • the processing unit 1302 may be further configured to: before sending the third configuration information to the second node through the communication unit 1301, receive the number of second reference signals that are associated with the first reference signal reported by the second node through the communication unit 1301 .
  • At least one item of the second configuration information or the third configuration information carries identification information, and the identification information is used to identify the interference link.
  • the identification information includes at least one of the following information: node information of the sixth node, where the sixth node and the second node are two end points of the interference link;
  • the beam information of the corresponding beam of the interference link is the beam information of the corresponding beam of the interference link.
  • the beam information includes at least one of the following information: quasi co-location information, transmission configuration indication TCI state, spatial relationship, and reference signal information.
  • the division of modules in the embodiments of this application is illustrative, and it is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of this application can be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It can be understood that the function or implementation of each module in the embodiment of the present application may further refer to the related description of the method embodiment.
  • the resource indicating device may be as shown in FIG. 14, and the device may be a network device or a chip in the network device.
  • the device may include a processor 1401, a communication interface 1402, and a memory 1403.
  • the processing unit 1302 may be a processor 1401.
  • the communication unit 1301 may be a communication interface 1402.
  • the processor 1401 may be a central processing unit (CPU), or a digital processing unit, and so on.
  • the communication interface 1402 may be a transceiver, an interface circuit such as a transceiver circuit, etc., or a transceiver chip, and so on.
  • the device also includes a memory 1403, which is used to store a program executed by the processor 1401.
  • the memory 1403 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., and may also be a volatile memory, such as random access memory (random access memory). -access memory, RAM).
  • the memory 1403 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the processor 1401 is configured to execute the program code stored in the memory 1403, and is specifically configured to execute the actions of the above-mentioned processing unit 1302, which will not be repeated here in this application.
  • the communication interface 1402 is specifically configured to perform the actions of the above-mentioned communication unit 1301, which will not be repeated here in this application.
  • the embodiment of the present application does not limit the specific connection medium between the communication interface 1402, the processor 1401, and the memory 1403.
  • the memory 1403, the processor 1401, and the communication interface 1402 are connected by a bus 1404.
  • the bus is represented by a thick line in FIG. , Is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 14, but it does not mean that there is only one bus or one type of bus.
  • the embodiment of the present invention also provides a computer-readable storage medium for storing computer software instructions required to execute the above-mentioned processor, which contains a program required to execute the above-mentioned processor.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un procédé et un appareil de mesure d'interférence, pour la mise en œuvre de la mesure de diverses CLI dans un réseau IAB. Ledit procédé comprend les étapes suivantes : un premier nœud reçoit des premières informations de configuration envoyées par un troisième nœud, les premières informations de configuration étant utilisées pour ordonner au premier nœud d'effectuer une mesure d'interférence sur une liaison subissant une interférence, et le troisième nœud étant un nœud hôte ou un nœud de niveau supérieur du premier nœud ; le premier nœud reçoit, en fonction des premières informations de configuration, un premier signal de référence envoyé par au moins un deuxième nœud ; et le premier nœud effectue une mesure d'interférence sur la base du premier signal de référence envoyé par l'au moins un deuxième nœud.
PCT/CN2020/075912 2020-02-19 2020-02-19 Procédé et appareil de mesure d'interférences WO2021163942A1 (fr)

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