WO2020192653A1 - Procédé de réglage du temps d'émission de liaison descendante et dispositif de communication - Google Patents

Procédé de réglage du temps d'émission de liaison descendante et dispositif de communication Download PDF

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Publication number
WO2020192653A1
WO2020192653A1 PCT/CN2020/080875 CN2020080875W WO2020192653A1 WO 2020192653 A1 WO2020192653 A1 WO 2020192653A1 CN 2020080875 W CN2020080875 W CN 2020080875W WO 2020192653 A1 WO2020192653 A1 WO 2020192653A1
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WIPO (PCT)
Prior art keywords
node
downlink transmission
transmission timing
timing
timer
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PCT/CN2020/080875
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English (en)
Chinese (zh)
Inventor
卓义斌
刘凤威
戴明增
刘菁
朱元萍
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华为技术有限公司
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Publication of WO2020192653A1 publication Critical patent/WO2020192653A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • This application relates to the field of communications, and more specifically, to a method and a communication device for adjusting downlink transmission timing.
  • an IAB node In an integrated access and backhaul (IAB) network, an IAB node (IAB node) can provide wireless access services for terminal devices.
  • the service data of the terminal equipment is connected to the donor node or the donor base station by the IAB node through the wireless backhaul link.
  • the IAB network supports multi-hop and multi-connection networking, so there may be multiple transmission paths between the terminal device and the donor base station.
  • On a transmission path there is a definite hierarchical relationship between IAB nodes, as well as between IAB nodes and the donor base station serving the IAB nodes.
  • Each IAB node regards the node providing the backhaul service as the parent node. Accordingly, each An IAB node can be regarded as a child node of its parent node.
  • the synchronization error of the entire network between IAB devices needs to be within the range defined by the standard.
  • how the IAB node performs downlink transmission timing is an urgent problem to be solved.
  • the present application provides a method and a communication device for adjusting the downlink transmission timing, which can prevent the IAB node from adjusting the downlink transmission timing too frequently, and improve the accuracy and precision of the IAB node in adjusting the downlink transmission timing.
  • a method for adjusting downlink transmission timing includes: a first node maintains a timer for controlling a time interval between two adjustments of downlink transmission timing, and the downlink transmission timing is the second The moment when a node sends a downlink signal to the second node; if the timer expires, the first node adjusts the downlink transmission timing and restarts the timer; wherein, the first node is a relay node in a wireless relay system, The second node is a child node of the first node in the wireless relay system.
  • the first node adjusts the timing of downlink transmission only when the timer expires according to the limit of the timer. During the running of the timer or when it has not expired, the downlink transmission timing is not adjusted. Therefore, it is possible to prevent the first node from adjusting the downlink transmission timing too frequently. For example, even if the timing adjustment information is received, it is possible that the downlink transmission timing is not adjusted. It can be avoided that the first node adjusts the downlink transmission timing every time it obtains the timing adjustment information. Therefore, the receiving performance of all terminal devices and sub-nodes served by the first node is improved.
  • the accuracy and precision of adjusting the downlink transmission timing by the first node are improved, thereby improving the efficiency of the downlink transmission timing in the IAB scenario.
  • using a timer as a condition to restrict the time or opportunity for the first node to adjust the downlink transmission timing is easy to implement and has high accuracy.
  • the method further includes: the first node receives configuration information from a third node, the configuration information is used to configure the timer; the third node is the wireless relay system The parent node of the first node or the host node in the wireless relay system.
  • the timer is used to control the time interval between two adjacent adjustments of the downlink transmission timing.
  • the adjusting the downlink transmission timing twice adjacently includes adjusting the downlink transmission timing for the first time and adjusting the downlink transmission timing for the second time; the method further includes: adjusting the downlink transmission timing for the first time After the downlink transmission timing, the first node starts or restarts the timer; if the timer expires, the first node adjusts the downlink transmission timing and restarts the timer, including: if the timer expires, the first node Adjust the downlink transmission timing for the second time, and restart the timer.
  • the method further includes: before the timer expires, the first node receives first indication information from a fourth node, the first indication information is used to instruct to adjust the downlink Transmission timing; before the timer expires, the first node adjusts the downlink transmission timing according to the first indication information, and restarts the timer; the fourth node is the parent node of the first node in the wireless relay system .
  • the method further includes: before the timer expires, the first node receives first indication information from a fourth node, the first indication information is used to instruct to adjust the downlink Transmission timing; if the timer expires, the first node adjusts the downlink transmission timing and restarts the timer, including: after the timer expires, the first node adjusts the downlink transmission timing according to the first indication information, and Restart the timer; the fourth node is the parent node of the first node in the wireless relay system.
  • the method further includes: after the timer expires, the first node receives first indication information from the fourth node, where the first indication information is used to instruct to adjust the downlink Transmission timing; if the timer expires, the first node adjusts the downlink transmission timing and restarts the timer, including: after the timer expires, the first node adjusts the downlink transmission timing according to the first indication information, and Restart the timer; the fourth node is the parent node of the first node in the wireless relay system.
  • the method further includes: the first node receives timing adjustment information from the fourth node, and the first indication information is used to instruct to adjust the downlink according to the timing adjustment information. Send timing.
  • the method further includes: after the first node adjusts the downlink transmission timing, the first node sends second indication information to the second node, the second indication information It is used to indicate one or more of the following: the first node has adjusted the downlink transmission timing, the adjustment amount of the downlink transmission timing, the effective time of the downlink transmission timing, and the second node adjusts the second node to the second node The moment when a node's child node sends a downlink signal.
  • a method for adjusting downlink transmission timing including: a mobile terminal MT unit of a first node maintains a timer, and the timer is used to control the time interval between two timing adjustments for determining downlink transmission timing; If the timer expires, the MT unit determines the timing adjustment amount and restarts the timer; the MT unit sends the timing adjustment amount information to the distributed unit DU of the first node; the DU adjusts the timing adjustment amount according to the timing adjustment amount Downlink transmission timing; where the downlink transmission timing is the moment when the first node sends a downlink signal to the second node, the first node is a relay node in a wireless relay system, and the second node is the wireless relay system The child node of this first node.
  • the MT unit of the first node determines the timing adjustment amount and restarts the timer when the timer expires according to the limit of the timer.
  • the timing adjustment amount is uncertain. Therefore, it is possible to avoid the timing adjustment value of the MT unit too frequently, and to send the determined timing adjustment value to the DU, which avoids the DU from adjusting the downlink transmission timing according to the timing adjustment value too frequently. It can be avoided that the MT unit obtains the timing adjustment information every time to determine the timing adjustment amount. Therefore, the receiving performance of all terminal devices and sub-nodes served by the first node is improved.
  • the accuracy and precision of the DU adjusting the downlink transmission timing are improved, thereby improving the efficiency of the downlink transmission timing in the IAB scenario.
  • using a timer as a condition to restrict the time or timing of the MT unit to determine the timing adjustment amount is easy to implement and has high accuracy.
  • the method further includes: the MT unit receives configuration information from a third node, where the configuration information is used to configure the timer; and the third node is in the wireless relay system The parent node of the first node or the host node in the wireless relay system.
  • the timer is used to control the time interval between the MT unit determining the timing adjustment amount twice.
  • the determining the timing adjustment amount twice consecutively includes determining a first timing adjustment amount and determining a second timing adjustment amount
  • the method further includes: the MT unit determines the first timing adjustment amount. Timing adjustment; the MT unit sends the first timing adjustment to the DU unit and starts or restarts the device; if the timer expires, the MT unit determines the timing adjustment and restarts the timer, including: If the timer expires, the MT unit determines the second timing adjustment amount and restarts the timer; the DU adjusts the downlink transmission timing according to the timing adjustment amount, including: the DU unit adjusts the downlink transmission timing according to the second timing adjustment amount Downlink transmission timing.
  • the method includes: before the timer expires, the MT unit receives third indication information from a fourth node, where the third indication information is used to instruct the MT unit to determine the Timing adjustment amount; before the timer expires, the MT unit determines the timing adjustment amount according to the first indication information, and restarts the timer; the fourth node is the parent node of the first node in the wireless relay system .
  • the method further includes: after the DU unit adjusts the downlink transmission timing, the DU unit sends fourth indication information to the second node, where the fourth indication information is used for Indicate one or more of the following: the DU unit has adjusted the downlink transmission timing, the adjustment amount of the downlink transmission timing, the effective time of the downlink transmission timing, and the second node adjusts the second node's child to the second node The moment when the node sends the downlink signal
  • a communication device which includes a unit for executing the steps in the above first aspect or any possible implementation of the first aspect.
  • a communication device in a fourth aspect, includes a unit for executing the above second aspect or any possible implementation of the second aspect.
  • a communication device in a fifth aspect, includes a processor coupled with a memory, and the memory is used to store a computer program or instruction, and the processor runs the computer program or instruction so that the foregoing first aspect or The method in any possible implementation of the first aspect is executed, and the communication device may further include the memory.
  • a communication device in a sixth aspect, includes a processor coupled with a memory, the memory is used to store a computer program or instruction, and the processor runs the computer program or instruction so that the second aspect or The method in any possible implementation manner of the second aspect is executed, and the communication device may further include the memory.
  • a relay node in a seventh aspect, includes the communication device provided in the foregoing third aspect, or the relay node includes the communication device provided in the foregoing fifth aspect.
  • a relay node is provided, and the relay node includes the communication device provided in the foregoing fourth aspect, or the relay node includes the communication device provided in the foregoing sixth aspect.
  • an embodiment of the present application provides a chip that includes a processor and an interface circuit, the interface circuit is coupled to the processor, and the processor is used to run a computer program or instruction to implement aspects such as the first aspect to the first aspect.
  • the interface circuit is used to communicate with other modules outside the chip.
  • a computer program product includes a computer program.
  • the computer program product includes a computer program.
  • the computer program is executed by a processor, it is used to execute the method in the first aspect or any possible implementation of the first aspect, Or execute the method in the second aspect or any possible implementation of the second aspect.
  • a computer-readable storage medium stores a computer program, and when the computer program is executed, it is used to execute the first aspect or any possible implementation manner of the first aspect Or implement the second aspect or any possible implementation of the second aspect.
  • FIG. 1 is a schematic diagram of the architecture of a mobile communication system applicable to an embodiment of the present application.
  • Figure 2 is a schematic diagram of uplink synchronization timing and downlink synchronization timing between a base station and a UE.
  • Figure 3 is a schematic diagram of synchronization timing in an IAB scenario.
  • FIG. 4 is a schematic interaction diagram of a method for adjusting downlink transmission timing provided by an embodiment of the present application.
  • FIG. 5 is a schematic interaction diagram of another method for adjusting downlink transmission timing according to an embodiment of the present application.
  • FIG. 6 is a schematic interaction diagram of another method for adjusting downlink transmission timing according to an embodiment of the present application.
  • FIG. 7 is a schematic interaction diagram of another method for adjusting downlink transmission timing according to an embodiment of the present application.
  • FIG. 8 is a schematic interaction diagram of another method for adjusting downlink transmission timing according to an embodiment of the present application.
  • FIG. 9 is a schematic interaction diagram of another method for adjusting downlink transmission timing provided by an embodiment of the present application.
  • FIG. 10 is a schematic interaction diagram of another method for adjusting downlink transmission timing according to an embodiment of the present application.
  • FIG. 11 is a schematic interaction diagram of another method for adjusting downlink transmission timing according to an embodiment of the present application.
  • FIG. 12 is a schematic interaction diagram of another method for adjusting downlink transmission timing according to an embodiment of the present application.
  • Fig. 13 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • FIG. 14 is a schematic diagram of another example of a communication device provided by an embodiment of the present application.
  • Fig. 15 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • FIG. 16 is a schematic diagram of another example of a communication device provided by an embodiment of the present application.
  • FIG. 17 is a schematic diagram of another example of a communication device provided by an embodiment of the present application.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD LTE Time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • the terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device.
  • the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and a wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (PLMN) Terminal equipment, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • PLMN public land mobile network
  • Terminal equipment can be virtual reality (VR) terminal equipment, augmented reality (augmented reality, AR) terminal equipment, wireless terminal in industrial control, wireless terminal in unmanned driving (selfdriving), remote surgery Wireless terminal in (remote medical surgery), wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, and smart home Wireless terminal and so on.
  • VR virtual reality
  • AR augmented reality
  • wireless terminal in industrial control wireless terminal in unmanned driving (selfdriving)
  • remote surgery Wireless terminal in remote surgery
  • wireless terminal in smart grid wireless terminal in transportation safety
  • wireless terminal in smart city and smart home Wireless terminal and so on.
  • the embodiment of the application does not limit this.
  • the access network equipment in the embodiments of the present application may be equipment used to communicate with terminal equipment.
  • the access network equipment may be a global system for mobile communications (GSM) system or code division multiple access (code division multiple).
  • GSM global system for mobile communications
  • code division multiple code division multiple
  • the base transceiver station (BTS) in access, CDMA) can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolution of the LTE system Evoled NodeB (eNB or eNodeB), it can also be a wireless controller in the cloud radio access network (CRAN) scenario, or it can be the next-generation base station in a 5G access technology communication system.
  • CRAN cloud radio access network
  • the access network device may be a relay station, an access point, an in-vehicle device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network, etc., embodiments of the present application Not limited.
  • the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution subject of the methods provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided according to the embodiments of the application.
  • the execution subject of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute the program.
  • computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CDs), digital versatile discs (digital versatile discs, DVDs) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • magnetic storage devices for example, hard disks, floppy disks, or tapes, etc.
  • optical disks for example, compact discs (CDs), digital versatile discs (digital versatile discs, DVDs) Etc.
  • smart cards and flash memory devices for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • the 5G communication system puts forward more stringent requirements in all aspects of network performance indicators. For example, the capacity index is increased by 1000 times, wider coverage requirements, ultra-high reliability and ultra-low latency, etc.
  • the capacity index is increased by 1000 times, wider coverage requirements, ultra-high reliability and ultra-low latency, etc.
  • the use of high-frequency small stations to network is becoming more and more popular.
  • the high-frequency carrier has poor propagation characteristics, severe attenuation due to obstruction, and limited coverage. Therefore, a large number of densely deployed small stations are required. Accordingly, providing optical fiber backhaul for these densely deployed small stations is expensive and difficult to construct.
  • IAB integrated access and backhaul
  • a relay node in an IAB network, can provide wireless access services for user equipment (UE).
  • UE user equipment
  • the service data of the UE is connected to a donor node (donor node) by the IAB node through a wireless backhaul link, and the donor node may also be referred to as a donor (donor) base station.
  • the donor base station can be the donor next-generation base station (donor gNodeB, DgNB), and in the LTE system (or 4G system), the donor base station can be (donor eNodeB, DeNB).
  • the donor base station can also be referred to as gNB or eNB for short.
  • DgNB can be an access network element with a complete base station function, or an access network device in the form of a centralized unit (CU) and a distributed unit (DU) that are separated.
  • the donor base station is connected to The core network (for example, connected to the 5G core network) network element served by the UE, and provides the wireless backhaul function for the IAB node.
  • the centralized unit of the host node can be referred to as "donor CU” for short, and the distributed unit of the host node can be referred to as "donor DU" for short.
  • the donor CU may also be a form in which the control plane (CP) and the user plane (UP) are separated.
  • the CU may be composed of one CU-CP and one (or more) CU-UPs.
  • IAB nodes can be made to support dual connectivity (DC) or multi-connectivity to deal with possible abnormal situations in the backhaul link. For example, abnormalities such as link interruption or blockage and load fluctuations can improve the reliability of transmission.
  • DC dual connectivity
  • multi-connectivity to deal with possible abnormal situations in the backhaul link. For example, abnormalities such as link interruption or blockage and load fluctuations can improve the reliability of transmission.
  • the IAB network supports multi-hop and multi-connection networking, so there may be multiple transmission paths between the terminal device and the donor base station.
  • On a transmission path there is a definite hierarchical relationship between IAB nodes, as well as between IAB nodes and the donor base station serving the IAB nodes.
  • Each IAB node regards the node providing the backhaul service as the parent node. Accordingly, each An IAB node can be regarded as a child node of its parent node.
  • Fig. 1 is a schematic diagram of a wireless relay system networking.
  • the parent node of IAB node (node) 1 is DgNB
  • IAB node 1 is the parent node of IAB node 2 and IAB node 3
  • IAB node 2 and IAB node 3 are the parent nodes of IAB node 4.
  • the parent node of IAB node 5 is IAB node 3.
  • the link between the terminal device and the IAB node is an access link
  • the link between the IAB node and between the IAB node and the donor base station is a backhaul link.
  • the uplink data packet of the terminal device may be transmitted to the donor base station DgNB via one or more IAB nodes, and then sent by the DgNB to the mobile gateway device (for example, the user plane function (UPF) in the 5G core network). After the downlink data packet is received by the DgNB from the mobile gateway device, it is sent to the terminal device through the IAB node.
  • the DgNB There are two available paths for data transmission between terminal device 1 and DgNB, path 1: terminal device 1 ⁇ IAB node4 ⁇ IAB node3 ⁇ IAB node1 ⁇ DgNB.
  • Path 2 Terminal device 1 ⁇ IAB node4 ⁇ IAB node2 ⁇ IAB node1 ⁇ DgNB. There are three available paths for data transmission between terminal device 2 and DgNB.
  • path 3 terminal device 2 ⁇ IAB node4 ⁇ IAB node3 ⁇ IAB node1 ⁇ DgNB
  • path 4 terminal device 2 ⁇ IAB node4 ⁇ IAB node2 ⁇ IAB node1 ⁇ DgNB
  • Path 5 Terminal device 2 ⁇ IABnode5 ⁇ IAB node2 ⁇ IAB node1 ⁇ DgNB.
  • FIG. 1 is only an example, and is only used to facilitate the understanding of the multi-hop and multi-connection networking supported by the IAB network. It should not impose any restrictions on the networking architecture of the IAB network.
  • the IAB network may also include more relay nodes, and the DgNB and the IAB node under another DgNB may form a dual connection to serve terminal devices, etc., which is not limited in the embodiment of the present application.
  • the synchronization timing between a network device (using a base station as an example) and a terminal device (using a UE as an example) in LTE or NR mainly includes downlink reception timing and uplink transmission timing.
  • Figure 2 is a schematic diagram of uplink synchronization timing and downlink synchronization timing between a base station and a UE.
  • the UE obtains the downlink reception timing of the UE by detecting the downlink synchronization signal sent by the base station, and the synchronization operation of the downlink reception timing is performed on the UE side.
  • the difference between the downlink reception timing on the UE side and the downlink transmission timing on the base station side is approximately the propagation delay T P between the base station and the UE.
  • the uplink transmission timing can be adjusted in the following two ways:
  • the first method The UE initiates a random access process to the base station, and the base station determines the timing advance (TA) value by measuring the preamble (preamble) pilot signal received during the random access process.
  • the media access control random access response (MAC RAR) signal in the access process carries the timing advance command (TAC) field and sends the TA value to the UE, and the UE sends the TA value to the UE according to the received
  • the TA value adjusts the uplink transmission timing. As shown in Figure 2, the UE's uplink transmission timing is TA relative to the downlink reception timing advance.
  • the second method In the radio resource control (RRC) connection state, the base station also needs to maintain TA information, which is used to continuously update the UE's uplink synchronization timing, for example, because of the UE's movement, crystal shift, etc. Caused by the upstream synchronization drift, etc.
  • the base station will send a MAC control element (MAC CE) carrying the TA adjustment value to the UE.
  • the field carrying the TA adjustment value may be the TAC field in the MAC CE.
  • the UE fine-tunes the original uplink synchronization timing according to the received TA adjustment value.
  • the base station can send many MAC CEs to the UE, that is, the base station can send TAs to the UE many times, and the UE can continuously perform uplink transmission timing according to the received MAC CE (TA included in the MAC CE).
  • the above solution is aimed at the uplink and downlink synchronization process between the terminal device and the network device, and does not involve the IAB node (relay node) in the IAB scenario.
  • the above scheme can also determine the downlink reception timing and uplink transmission timing between the IAB node and the parent node, between the terminal device and the IAB node, and between the terminal device and the donor base station.
  • this solution cannot determine whether the IAB node is Downlink transmission timing between child nodes.
  • the downlink transmission timing between the IAB node and the child node can be understood as the time or time when the IAB node sends a signal to its child node
  • the synchronization timing of the IAB node is achieved through uplink and downlink synchronization with its parent node.
  • a downlink synchronization scheme for IAB nodes is the difference between the donor base station and all the IAB nodes it serves. Downstream transmission timing is aligned.
  • FIG. 3 is a schematic diagram of synchronization timing in an IAB scenario.
  • node 1 is the parent node of node 2
  • node 2 is the parent node of node 3.
  • node 1 may be the base station shown in FIG. 2
  • node 2 may be the UE shown in FIG. 2.
  • the method for determining the downlink reception timing and uplink transmission timing of the node 2 is the same as the method of the UE downlink reception timing and uplink transmission timing shown in FIG. 2 above.
  • the downlink sending timing of node 2 can be understood as the time or time when node 2 sends a signal to node 3.
  • Node 2 can be based on the received RAR signaling and MAC CE signaling sent by node 1
  • the TA information contained in the TAC field determines the adjustment amount of the downlink transmission timing.
  • a simple implementation is to advance TA/2+offset based on the downlink receiving timing of node 2, and the offset value offset can be configured by node 1.
  • the downlink transmission timing of node 2 can be determined in this way.
  • node 2 because node 2 will continuously receive MAC CE, or, node 2 will also receive MAC RAR during cell handover. Therefore, node 2 uses the TA contained in the TAC field in each received RAR signaling and MAC CE signaling to adjust the downlink transmission timing too frequently, which affects the receiving performance of all terminal devices and sub-nodes served by node 2.
  • node 2 adjusts the downlink transmission timing according to the received TA every time. Since the downlink transmission timings of all the child nodes of node 2 (including node 3) need to be aligned, the child nodes of node 2 also need to continuously adjust the downlink transmission timing. Send timing. In addition, considering that the TA obtained during initial access may not be accurate enough, if node 2 adjusts the downlink transmission timing adjustment according to the received TA information at this time, it may cause a large synchronization error.
  • this application provides a method for adjusting the timing of downlink transmission.
  • the IAB node can according to preset conditions (such as time threshold and/or indication information), after receiving the timing adjustment information sent by the parent node, according to the preset
  • the set conditions determine whether to adjust the downlink transmission timing, and only when the preset conditions are met, the downlink transmission timing is adjusted. This can prevent the IAB node from adjusting the downlink transmission timing too frequently, improve the accuracy and precision of the IAB node in adjusting the downlink transmission timing, thereby improving the efficiency of the downlink transmission timing in the IAB scenario, and improving all terminal equipment and sub-nodes served by the IAB node The receiving performance.
  • the first node is a relay node in a wireless relay system
  • the second node is a child node of the first node in the wireless relay system
  • the third node is a relay node of the first node in the wireless relay system.
  • the fourth node is the parent node of the first node in the wireless relay system.
  • the third node and the fourth node may be the same node.
  • the wireless relay system may include the wireless relay system shown in FIG. 1.
  • the second node can be IAB node 2 or IAB node 3, and the third node can be DgNB shown in Figure 1, and the fourth node can also be DgNB shown in 1.
  • the first node is IAB node 3 shown in FIG. 1
  • the second node may be IAB node 4
  • the third node may be IAB node 1 or DgNB shown in FIG. 1.
  • the fourth node may be the IAB node 1 shown in FIG. 1.
  • the child node may determine whether to adjust the downlink transmission timing according to a time threshold. For example, after the child node receives the timing adjustment information (such as TA) sent by its parent node, it will determine whether to adjust the downlink transmission timing according to the time threshold.
  • the time threshold can be the length of a time period, or it can be an expiration time or expiration timestamp. For example, the time threshold is an expiration time. Before the time expiration time, the first node even receives the parent node's The timing adjustment information does not adjust the downlink transmission timing, and only after the time expires, the first node adjusts the downlink transmission timing.
  • the child node can be controlled to adjust the frequency of the downlink transmission timing, or the child node can be controlled to adjust the time interval between the downlink transmission timing multiple times, thereby avoiding the IAB node from adjusting the downlink transmission timing too frequently, and improving the downlink transmission in the IAB scenario Timing efficiency.
  • FIG. 4 is a schematic flowchart of a method 200 for adjusting downlink transmission timing according to an embodiment of the present application.
  • the method 200 may be applied in the scenario shown in FIG. Of course, it can also be applied in other communication scenarios, and the embodiments of the present application are not limited herein.
  • the method of each embodiment is described by taking the node as the execution subject of the execution method of each embodiment as an example.
  • the execution subject of the execution method may also be a chip applied to the node.
  • the method 200 shown in FIG. 4 may include S210 to S220.
  • the method 200 may further include S208 and S209. The steps in the method 200 are described in detail below in conjunction with FIG. 4.
  • the method 200 includes:
  • the first node maintains a timer, where the timer is used to control the time interval between the first node to adjust the downlink transmission timing twice.
  • the downlink sending timing is the moment or time when the first node sends a downlink signal to the second node.
  • the first node continuously obtains timing adjustment information, and the timing adjustment information is used by the first node to adjust the downlink transmission timing.
  • the parent node of the first node (for example, the third node or the fourth node) will send timing adjustment information to the first node.
  • the timing adjustment information may carry a timing adjustment amount, and the timing adjustment amount may be a timing advance amount or a timing delay amount.
  • the timing adjustment information may be MAC RAR or MAC CE sent to the first node by the parent node of the first node in the wireless relay system. Further, the timing adjustment amount may be TA carried in MAC RAR or MAC CE.
  • the adjustment of the downlink sending timing by the first node may be understood as the first node adjusting the time or moment of sending the downlink signal to the second node.
  • the first node may maintain a timer, and the timer is used to control the time interval between the first node to adjust the downlink transmission timing twice. Among them, the first node maintains the timer. Maintenance can be understood as starting, restarting, resetting and other timer-related operations, etc., which can all be called maintenance timers.
  • the first node uses the start time and timeout time of the timer to determine a time period. If the timer is used to control the first node to adjust the time interval between two adjacent downlink transmission timings, then within this time period, the first The node cannot adjust the downlink transmission timing, and adjusts the downlink transmission timing after the timer expires.
  • the timer can be started after the downlink transmission timing is adjusted for the first time among the two downlink transmission timing adjustments.
  • the first node starts the timer after adjusting the downlink transmission timing for the Nth time.
  • the timer is used to control the time interval between the Nth and N+1th adjustments of the next timing by the first node, that is, to control the first
  • the node adjusts the time of the next timing for the N+1th time.
  • the first node adjusts the next timing for the N+1th time. If the timer is used to control the time interval between the first node not adjusting the downlink transmission timing twice adjacently, then within this time period, the first node can adjust the downlink times equal to or less than the preset times. Send timing.
  • the downlink transmission timing can be adjusted at most once within the time period during which the timer is running.
  • the first node starts the timer after adjusting the downlink transmission timing for the Nth time, and the timing The device is used to control the time interval between the Nth time and the N+2th adjustment of the next timing of the first node, that is, control the N+2th time of the first node to adjust the time of the next timing, within the time period of the timer running ,
  • the first node can adjust the downlink transmission timing at most once.
  • the adjustment performed here at most once does not include the adjustment when the timer expires, that is, the N+2th adjustment of the next timing is not included.
  • an example will be described by controlling the time interval between the first node to adjust the downlink transmission timing twice.
  • the first node adjusts the downlink transmission timing and restarts the timer. That is to say, while the timer is running, even if the first node receives the timing adjustment information sent by the parent node, it does not adjust (perform) the downlink transmission timing. Only when the timer is in the non-running period or after it times out, the first node adjusts the downlink transmission timing. It should be understood that when the timer expires, it can be understood as the time when the timer expires, that is, at the time when the timer expires, the first node immediately adjusts the downlink transmission timing; or when the timer expires, it can be understood as the time or time after the time when the timer expires. After the timing expires, the first node adjusts the downlink transmission timing.
  • the first node adjusts the downlink transmission timing and starts the timer. If the timer only stops (stops the watch) during the timeout timer, and does not automatically return to the initial value, the first node will restart the timer after adjusting the downlink transmission timing.
  • the first node adjusts the timing of downlink transmission only when the timer expires according to the limit of the timer. During the running of the timer or when it has not expired, the downlink transmission timing is not adjusted. Therefore, it is possible to prevent the first node from adjusting the downlink transmission timing too frequently. For example, even if the timing adjustment information is received, it is possible that the downlink transmission timing is not adjusted. It can be avoided that the first node adjusts the downlink transmission timing every time it obtains the timing adjustment information. Therefore, the receiving performance of all terminal devices and sub-nodes served by the first node is improved.
  • the accuracy and precision of adjusting the downlink transmission timing by the first node are improved, thereby improving the efficiency of the downlink transmission timing in the IAB scenario.
  • using a timer as a condition to restrict the time or opportunity for the first node to adjust the downlink transmission timing is easy to implement and has high accuracy.
  • the timer duration (initial value) may be greater than the duration of the two consecutive MAC CE intervals sent by the parent node of the first node to the first node, or the timer duration may be greater than that of the parent node of the first node.
  • the length of the interval between the MAC RAR and the MAC CE sent by the first node both carry the adjustment amount information for the first node to adjust the downlink transmission timing. For example, MAC RAR and MAC CE both carry TA amount.
  • the first node in addition to using a timer to achieve the time threshold, other methods can also be used to control the first node to adjust the downlink transmission timing twice.
  • the first node can be controlled to adjust the downlink transmission timing twice through the displayed instruction information.
  • the first node is instructed to adjust the downlink transmission timing through the indication information. If the indication information is not received, the downlink transmission timing is not adjusted.
  • the first node may also be predefined or configured to adjust the downlink transmission timing or time. The first node adjusts the downlink transmission timing only at the defined or configured time or time, and this application does not limit it here.
  • the method S200 may further include S208.
  • the first node receives configuration information from a third node, where the configuration information is used to configure the timer; the third node is a parent node of the first node in the wireless relay system or a host node in the wireless relay system.
  • the first node may receive configuration information from the third node, and the configuration information is used to configure the timer.
  • the timer is used to control the time interval between the first node adjusting the downlink transmission timing twice.
  • the configuration information may include the duration of the timer, the start time of the timer, or the opening conditions.
  • the first node may maintain the timer according to the configuration information. For example, the start condition, restart or reset condition of the timer is determined according to the configuration information to start, restart or reset the timer.
  • the timing can also be implemented in a predefined manner.
  • the third node may not send the configuration information to the first node for configuring the timer.
  • the configuration information of the timer can also be predefined by the protocol.
  • the first node itself stores the configuration information.
  • the method S200 may further include S209.
  • S209 The first node receives timing adjustment information from the fourth node.
  • the first node may receive timing adjustment information from the fourth node.
  • the timing adjustment information may carry a timing adjustment, and the timing adjustment may be a timing advance or a timing delay.
  • the timing adjustment information may be MAC RAR or MAC CE sent by the fourth node to the first node. Further, the timing adjustment amount may be TA carried in MAC RAR or MAC CE. E.g. TA can be carried in the TAC field in MAC RAR or MAC CE.
  • the first node adjusts the downlink transmission timing, and may adjust the downlink transmission timing according to the timing adjustment amount information.
  • adjusting the downlink transmission timing twice adjacently includes adjusting the downlink transmission timing for the first time by the first node and adjusting the downlink transmission timing for the second time.
  • the first time and the second time are adjacent two adjustments of downlink transmission timing.
  • FIG. 5 is a schematic interaction diagram of a method for adjusting downlink transmission timing in some embodiments of the present application: the method 300 shown in FIG. 5 includes: S310 and S320, Optionally, the method 300 further includes S308 and S309.
  • the first node adjusts the downlink sending timing for the first time, and starts or restarts the timer.
  • the first adjustment of the downlink transmission timing here refers to the previous adjustment of the downlink transmission timing relative to the second adjustment of the downlink transmission timing. For example, if the second adjustment of the downlink transmission timing is the fourth adjustment of the downlink transmission timing, the first adjustment of the downlink transmission timing is the third adjustment of the downlink transmission timing.
  • adjusting the downlink transmission timing twice may include adjusting the downlink transmission timing for the first time by the first node and adjusting the downlink transmission timing for the second time.
  • the first time to adjust the downlink transmission timing can be that the first node adjusts the downlink transmission timing according to the TA in the MAC RAR when initially accessing the network
  • the second time adjustment of the downlink transmission timing can be the first node to access the network according to the MAC RAR.
  • the TA in the received MAC CE adjusts the downlink transmission timing.
  • the first node After the first node adjusts the downlink transmission timing for the first time, the first node starts or restarts the timer.
  • the first node may adjust the downlink transmission timing according to the TA in the MAC RAR, and start the timer after adjusting the downlink transmission timing.
  • the first node receives the timing adjustment information (for example, MAC CE) sent by the third node during the time period after the timer is started, it will not adjust the downlink transmission timing according to the TA in the MAC CE. If the timer expires, the first node adjusts the downlink transmission timing for the second time, and restarts or starts the timer.
  • the first node does not adjust the downlink transmission timing.
  • the steps shown in FIG. 5 may further include S308: the first node receives configuration information from the third node, the configuration information is used to configure the timer, and the first node may maintain the timer according to the configuration information.
  • S308 the first node receives configuration information from the third node, the configuration information is used to configure the timer, and the first node may maintain the timer according to the configuration information.
  • the steps shown in FIG. 5 may further include S309, where the first node receives timing adjustment information from the fourth node.
  • S309 For the description of S309, reference may be made to the above description of S209, which is not repeated here.
  • the first node may adjust the downlink transmission timing for the second time according to the timing adjustment amount information.
  • FIG. 6 is a schematic interaction diagram of a method for adjusting downlink transmission timing in some embodiments of the present application.
  • the method 400 shown in FIG. Including: S410 and S420.
  • the method 400 further includes S408-S409.
  • the first node Before the timer expires, if the first node receives first indication information from the fourth node, the first indication information is used to instruct to adjust the downlink transmission timing.
  • the fourth node is the parent node of the first node in the wireless relay system.
  • the first node adjusts the downlink transmission timing according to the first indication information, and restarts the timer.
  • the first node receives the first indication information sent by the fourth node, and the first indication information is used to instruct the first node to adjust the sending synchronization timing.
  • the fourth node is the parent node of the first node in the wireless relay system.
  • the first node adjusts the downlink transmission timing according to the first indication information, and restarts or starts the timer. That is to say, during the timer operation period, if the first node receives the first indication information sent by the parent node for instructing the first node to adjust the downlink transmission timing, then during the timer operation period, the first node adjusts the downlink transmission timing. And restart or start the timer.
  • the first node can continue to maintain the timer. For example, if the timer expires, the first node adjusts the downlink transmission timing and restarts the timer. Or, before the timer expires, the first instruction information sent by the fourth node is received, then before the timer expires, the first node adjusts the downlink transmission timing according to the first instruction information, and restarts the timer .
  • the combination of the timer and the first indication information is used as a condition to restrict whether the first node adjusts the downlink transmission timing, and the accuracy is further improved.
  • the first node may be notified to adjust the downlink transmission timing by means of indication information, so that the timer is not limited by the timer, so that the first node can adjust the downlink transmission timing more flexibly.
  • the accuracy and precision of the relay node in adjusting the downlink transmission timing are improved, thereby improving the efficiency of the relay node in adjusting the downlink transmission timing.
  • the steps shown in FIG. 6 may further include S408: the first node receives configuration information from the third node, the configuration information is used to configure the timer, and the first node may maintain the timer according to the configuration information.
  • S408 refer to the above description of S208, which is not repeated here.
  • the steps shown in FIG. 6 may further include S409, where the first node receives timing adjustment information from the fourth node.
  • S409 For the description of S409, reference may be made to the above description of S409, which will not be repeated here.
  • the first node may adjust the downlink transmission timing according to the timing adjustment amount information.
  • the first indication information may also be used to instruct the first node to adjust the downlink transmission timing according to the timing adjustment amount included in the timing adjustment amount information. That is, in S420, before the timer expires, the first node may adjust the downlink transmission timing according to the timing adjustment amount information indicated by the first indication information.
  • the first indication information may also include a timing adjustment amount used by the first node to adjust the downlink transmission timing.
  • the first node may according to the timing adjustment amount carried in the first indication information. Adjust the downlink transmission timing.
  • the first indication may not carry the timing adjustment amount, and the first indication information may also instruct the first node to adjust the downlink transmission timing according to the timing adjustment information received before or after the timer expires.
  • FIG. 7 is a schematic interaction diagram of a method for adjusting downlink transmission timing in some embodiments of the present application.
  • the method 500 shown in FIG. Including: S510 and S520.
  • the method 500 further includes S508 and S509.
  • the first node Before the timer expires, the first node receives first indication information from the fourth node, where the first indication information is used to instruct to adjust the downlink transmission timing;
  • the first node adjusts the downlink transmission timing according to the first indication information, and restarts the timer.
  • the first node receives the first indication information sent by the fourth node, where the first indication information is used to instruct the first node to adjust the downlink transmission timing.
  • the first node adjusts the downlink transmission timing according to the first indication information, and restarts or starts the timer. That is to say, during the running period of the timer, if the first node receives the first instruction information sent by the parent node for instructing the first node to adjust the downlink transmission timing, after the timer expires, the first node can follow the One indication information, adjust the downlink transmission timing, and restart or start the timer.
  • the first indication information may further include a timing adjustment amount used by the first node to adjust the downlink transmission timing.
  • the first indication information may also be used to instruct the first node to adjust the downlink transmission timing according to the timing adjustment amount.
  • the first indication may not carry the timing adjustment amount, and the first indication information may also instruct the first node to adjust the downlink transmission timing according to the timing adjustment information received before or after the timer expires.
  • the first node may also receive the first indication information from the fourth node after the timer expires, that is, before the timer expires, the first node does not receive the first indication information sent by the fourth node. After the timer times out, the first node receives the first indication information from the fourth node. Then execute S520: After the timer expires, the first node adjusts the downlink transmission timing according to the first indication information, and restarts or starts the timer.
  • steps shown in FIG. 7 may also include S508: the first node receives configuration information from the third node, the configuration information is used to configure the timer, and the first node may maintain the timer according to the configuration information .
  • S508 the first node receives configuration information from the third node, the configuration information is used to configure the timer, and the first node may maintain the timer according to the configuration information .
  • the steps shown in FIG. 7 may further include S509, where the first node receives timing adjustment information from the fourth node.
  • S509 For the description of S509, reference may be made to the above description of S209, which is not repeated here.
  • the first node may adjust the downlink transmission timing according to the timing adjustment amount information.
  • the first indication information may also be used to instruct the first node to adjust the downlink transmission timing according to the timing adjustment amount included in the timing adjustment amount information. That is, in S520, after the timer expires, the first node may adjust the downlink transmission timing according to the timing adjustment amount information indicated by the first indication information.
  • the first indication information may also include a timing adjustment amount used by the first node to adjust the downlink transmission timing.
  • the first node may according to the timing adjustment amount carried in the first indication information Adjust the downlink transmission timing.
  • the first indication may not carry the timing adjustment amount, and the first indication information may also instruct the first node to adjust the downlink transmission timing according to the timing adjustment information received before or after the timer expires.
  • the timing adjustment amount information may be received first, and the first indication information may be received after the timing adjustment amount information is received.
  • the first indication information may be received first, and then the timing adjustment amount information may be received. This application does not limit the order of the first indication information and the timing adjustment amount information.
  • timing adjustment amount information may be MAC RAR or MAC CE sent by the fourth node to the first node.
  • the timing adjustment amount information may also be the timing adjustment amount of the first node calculated by the fourth node.
  • the first indication information may also carry a timing adjustment amount.
  • the downlink transmission timing may be adjusted according to the timing adjustment amount carried in the timing adjustment amount information.
  • the downlink transmission timing may also be adjusted according to the first indication information including the timing adjustment amount. For example, when the first instruction information sent by the fourth node is received before the timer expires or during operation, and the first downlink transmission timing is performed, the first node may carry out the timing adjustment information according to the received timing. The time adjustment amount adjusts the downlink transmission timing.
  • the downlink transmission timing may also be adjusted according to the first indication information including the timing adjustment amount.
  • the timing adjustment amount carried in the timing adjustment information is TA
  • the first node determines TA/2+offset as the adjustment amount of the downlink transmission timing, and adjusts to the third node according to TA/2+offset
  • the time for sending the downlink signal and the offset value offset can be configured by the fourth node.
  • the timing adjustment amount carried in the first indication information may be the adjustment amount calculated by the fourth node according to the timing adjustment amount carried in the timing adjustment information, or it may also be the TA sent by the fourth node to the first node last time. Or, it may also be the timing adjustment amount determined by the fourth node according to the TA sent to the first node last time.
  • the first node may receive a lot of timing adjustment information, and only when it needs to adjust the downlink transmission timing, it determines how much downlink transmission timing needs to be adjusted and adjusts according to the timing adjustment amount.
  • the first indication information may be carried in the MAC RAR, MAC CE, adaptation layer information, downlink control information (downlink control information, DCI), sent by the fourth node to the first node. Any type of information in broadcast information.
  • the first indication information may also be carried in other possible signaling sent by the fourth node to the first node. This application is not restricted here.
  • first indication information and the timing adjustment amount information may be sent in the same piece of signaling.
  • MAC RAR or MAC CE may carry first indication information and timing adjustment information.
  • the first indication information may be carried on bits reserved in the MAC RAR, and the TAC field in the MAC RAR carries the timing adjustment information.
  • the first indication information and the timing adjustment amount information may be sent in different signaling. That is, the fourth node sends the first indication information and the timing adjustment amount information to the first node respectively.
  • the first node may also send second indication information to the second node, and the second indication information is used to indicate one or more of the following: Item: The first node has adjusted the downlink transmission timing, the adjustment amount of the downlink transmission timing, the effective time of the downlink transmission timing, and the second node adjusted the second node to send downlink signals to the child nodes of the second node time.
  • the first node may also send indication information (second indication information) to its child node (second node).
  • the second indication information is used to indicate to the second node that the first node has completed the adjustment of the first downlink transmission timing, the adjustment amount of the downlink transmission timing performed by the first node, the effective time of the first downlink transmission timing, Instruct the second node to adjust at least one of the downlink transmission timing and the second node to adjust the timing adjustment amount of the downlink transmission timing.
  • the second node can determine the time when it adjusts the downlink transmission timing with its child nodes, or it can also determine the adjustment amount of the downlink transmission timing by itself.
  • the second node can accurately adjust the downlink transmission timing, which can prevent the second node from adjusting the downlink transmission timing every time it receives the timing adjustment information sent by the first node. Therefore, the receiving performance of all terminal devices and sub-nodes served by the second node is improved. The accuracy and precision of the second node in adjusting the timing of downlink transmission are improved.
  • the timer may also control the first node to adjust the downlink receiving timing twice, or the timer may also control the first node to adjust the uplink twice
  • the specific control method for sending timing is similar to the method for controlling the first node to adjust the downlink sending timing twice.
  • the timer may not be used to control the first node to adjust the downlink reception timing twice and adjust the uplink transmission timing twice.
  • the specific process of adjusting the downlink reception timing and uplink transmission timing by the first node refer to the UE and base station shown in Figure 2 The specific description of the process of adjusting the downlink reception timing and the uplink transmission timing between, for brevity, will not be repeated here.
  • the adjustment of the downlink reception timing by the first node can be understood as the moment when the first node adjusts to receive the downlink signal sent by its parent node.
  • the adjustment of the uplink transmission timing by the first node may be understood as the moment when the first node adjusts the uplink signal sent to its parent node.
  • the first node includes a mobile terminal (MT) unit and a distributed unit (DU).
  • the MT unit mainly completes functions or steps similar to terminal equipment
  • the DU unit mainly completes functions or steps similar to base stations.
  • FIG. 8 is a schematic flowchart of a method 600 for adjusting downlink transmission timing according to an embodiment of the present application. As shown in FIG. 8, the method 600 shown in FIG. 8 may include S610 to S640. The steps in the method 600 are described in detail below in conjunction with FIG. 8.
  • the method 600 includes:
  • the MT unit of the mobile terminal of the first node maintains a timer, which is used to control the time interval between the MT unit twice determining the timing adjustment amount of the downlink transmission timing.
  • the MT unit sends the timing adjustment amount information to the distributed unit DU of the first node.
  • the timing adjustment information includes the timing adjustment determined by the MT unit in S620.
  • the DU adjusts the downlink transmission timing according to the timing adjustment amount.
  • the downlink transmission timing is the moment when the first node sends a downlink signal to the second node, the first node is a relay node in the wireless relay system, and the second node is the first node in the wireless relay system.
  • the child nodes of the node are the moment when the first node sends a downlink signal to the second node, the first node is a relay node in the wireless relay system, and the second node is the first node in the wireless relay system.
  • the first node may include an MT unit and a DU.
  • the MT unit is used to determine the timing adjustment amount of the downlink transmission timing of the first node, and send the timing adjustment amount to the DU, and the DU adjusts the downlink according to the timing adjustment amount.
  • Send timing is the moment or time when the first node sends a downlink signal to the second node
  • the first node is a relay node in the wireless relay system
  • the second node is the Child node of the first node.
  • the MT unit of the first node maintains a timer.
  • Maintenance can be understood as starting, restarting, resetting and other timer-related operations, etc., which can all be called maintenance timers.
  • the timer is used to control the time interval between the MT unit twice determining the timing adjustment amount of the downlink transmission timing.
  • the time interval can be understood as a time threshold.
  • the time threshold judgment condition of the MT unit determines whether to determine the timing adjustment amount of the downlink transmission timing.
  • the timing adjustment amount of the downlink transmission timing is time information used by the DU to adjust the downlink transmission timing.
  • the time threshold may be a time period or a timestamp, or may also be an end time of a time.
  • the MT unit may determine whether to determine the timing adjustment amount of the downlink transmission timing according to the first time threshold.
  • the time threshold is the expiration time of a time, before the expiration time of the time, the MT unit is uncertain of the timing adjustment amount. Only after the time expires, the MT unit determines the timing adjustment amount. That is, the time threshold is a preset determination condition for the MT unit to determine whether to determine the timing adjustment amount.
  • the time threshold can be implemented by means of a timer. That is, in S610, the MT unit may maintain a timer, which is used to control the time interval between the MT unit determining the timing adjustment amount of the downlink transmission timing twice. During this period of time when the timer is running, the MT unit does not determine the timing adjustment amount. After the timer expires, the MT unit determines the timing adjustment amount.
  • the MT unit determines the timing adjustment amount and restarts the timer. That is to say, during the running of the timer, even if the MT unit receives the timing adjustment information sent by the parent node, the timing adjustment amount is not determined. Only when the timer is in the non-running period or after it has timed out, the MT unit determines the timing adjustment amount. It should be understood that when the timer expires, it can be understood as the time when the timer expires, or when the timer expires, it can be understood as the time after the timer expires.
  • the MT unit sends the timing adjustment amount information to the DU, that is, the MT unit sends the timing adjustment amount information to the DU of the first node.
  • the DU adjusts the downlink transmission timing according to the timing adjustment amount. Specifically, the DU adjusts the time or time for sending the downlink signal to the second node according to the timing adjustment amount.
  • the MT unit of the first node determines the timing adjustment amount and restarts the timer when the timer expires according to the limit of the timer.
  • the timing adjustment amount is uncertain. Therefore, it is possible to avoid the timing adjustment value of the MT unit too frequently, and to send the determined timing adjustment value to the DU, which avoids the DU from adjusting the downlink transmission timing according to the timing adjustment value too frequently. It can avoid determining the timing adjustment amount every time the MT unit obtains the timing adjustment information. Therefore, the receiving performance of all terminal devices and sub-nodes served by the first node is improved.
  • the accuracy and precision of the DU adjusting the downlink transmission timing are improved, thereby improving the efficiency of the downlink transmission timing in the IAB scenario.
  • using a timer as a condition to restrict the time or timing of the MT unit to determine the timing adjustment amount is easy to implement and has high accuracy.
  • the method S600 may further include S608.
  • the MT unit receives configuration information from the third node, where the configuration information is used to configure the timer.
  • the MT unit may receive configuration information from the third node, and the configuration information is used to configure the timer.
  • the third node is the parent node of the first node in the wireless relay system or the host node in the wireless relay system.
  • the MT unit can maintain a timer according to the configuration information. For example, the start condition, restart or reset condition of the timer is determined according to the configuration information to start, restart or reset the timer.
  • the timing can also be implemented in a predefined manner.
  • the third node may not send the configuration information to the MT unit for configuring the timer.
  • the configuration information can also be predefined by the protocol.
  • the MT unit itself stores the configuration information.
  • the method 600 may further include S609.
  • S609 The MT unit receives timing adjustment information from the fourth node.
  • the MT unit may receive timing adjustment information from a fourth node, which is the parent node of the first node in the wireless relay system.
  • the timing adjustment amount information may carry a timing adjustment amount, and the timing adjustment amount may be a timing advance amount or a timing delay amount.
  • the timing adjustment information may be MAC RAR or MAC CE sent by the fourth node to the MT unit. Further, the timing adjustment amount may be TA carried in MAC RAR or MAC CE. E.g. TA can be carried in the TAC field in MAC RAR or MAC CE.
  • the timing adjustment amount may be determined according to the timing adjustment amount information.
  • the MT unit determines the timing adjustment amount.
  • the timer can be started after determining the timing adjustment twice for the first time. If the timer is used to control the time interval between the MT unit not determining the timing adjustment twice, in this time period, the MT unit can determine the timing adjustment amount equal to or less than the preset number of times .
  • determining the timing adjustment amount by the MT unit twice includes determining the first timing adjustment amount and determining the second timing adjustment amount.
  • the first timing adjustment amount and the second timing adjustment amount are the two adjacent timing adjustment amounts of the MT unit.
  • FIG. 9 is a schematic interaction diagram of a method for adjusting downlink transmission timing in some embodiments of the present application.
  • the method 700 shown in FIG. 9 includes: S710 to S740, optional , The method 700 further includes S708 and S709.
  • the MT unit determines a first timing adjustment amount, and sends the first timing adjustment amount to the DU unit, and the MT unit starts or restarts the device;
  • S730 The MT unit sends the second timing adjustment information to the distributed unit DU.
  • the DU unit adjusts the downlink transmission timing according to the second timing adjustment amount.
  • the MT unit determining the timing adjustment twice includes determining the first timing adjustment and determining the second timing Adjustment amount.
  • the MT unit determines the first timing adjustment amount, and sends the first timing adjustment amount to the DU unit. The MT unit starts or restarts the device.
  • the MT unit does not determine the timing adjustment amount during the time period after the timer is started. If the timer expires, the MT unit determines the second timing adjustment amount, and restarts or starts the timer.
  • the MT unit sends the second timing adjustment information to the distributed unit DU.
  • the DU unit adjusts the downlink transmission timing according to the second timing adjustment amount.
  • the steps shown in FIG. 9 may further include S708: the first node receives configuration information from the third node, the configuration information is used to configure the timer, and the MT unit may maintain the timer according to the configuration information.
  • S708 the first node receives configuration information from the third node, the configuration information is used to configure the timer, and the MT unit may maintain the timer according to the configuration information.
  • the steps shown in FIG. 5 may further include S709, where the MT unit receives timing adjustment information from the fourth node.
  • S709 For the description of S709, reference may be made to the above description of S609, which is not repeated here.
  • the first node may determine the second timing adjustment amount according to the timing adjustment amount information.
  • FIG. 10 is a schematic interaction diagram of a method 800 for adjusting downlink transmission timing in some embodiments of the present application.
  • the method shown in FIG. 800 includes: S810 to S840.
  • method 800 further includes S808 and S809.
  • the MT unit Before the timer expires, the MT unit receives third indication information from the fourth node, where the third indication information is used to instruct the MT unit to determine the timing adjustment amount;
  • the MT unit determines the timing adjustment amount according to the third indication information, and restarts the timer; the fourth node is the parent node of the first node in the wireless relay system.
  • the MT unit sends the timing adjustment amount information to the distributed unit DU of the first node.
  • S840 The DU adjusts the downlink transmission timing according to the timing adjustment amount.
  • the MT unit receives the third indication information sent by the fourth node, and the third indication information is used to instruct the MT unit to determine the timing adjustment amount.
  • the MT unit determines the timing adjustment amount according to the third indication information, and restarts or starts the timer. Then the determined timing adjustment is sent to the DU, and the DU adjusts the downlink transmission timing according to the timing adjustment. That is to say, during the operation of the timer, if the MT unit receives the third indication information sent by the parent node for instructing the MT unit to determine the timing adjustment amount, the MT unit determines the timing adjustment amount during the timer operation. And restart or start the timer.
  • the steps shown in FIG. 10 may further include S808: the MT unit receives configuration information from the third node, the configuration information is used to configure the timer, and the MT unit may maintain the timer according to the configuration information.
  • S808 refer to the above description of S608, which is not repeated here.
  • the steps shown in FIG. 10 may further include S809, where the MT unit receives timing adjustment information from the fourth node.
  • S809 refer to the above description of S609, which is not repeated here.
  • the MT unit may determine the timing adjustment amount according to the timing adjustment amount information.
  • the third indication information may also be used to instruct the MT unit to determine the timing adjustment amount according to the timing adjustment amount information. That is, in S820, before the timer expires, the MT unit may determine the timing adjustment amount according to the timing adjustment amount information indicated by the first indication information.
  • the first indication information may further include a reference timing adjustment amount.
  • the MT unit may determine the timing adjustment amount according to the reference timing adjustment amount carried in the third indication information.
  • the third indication may not carry the reference timing adjustment amount, and the third indication information may also instruct the MT unit to determine the timing adjustment amount according to the timing adjustment information received before or after the timer expires.
  • FIG. 11 is a schematic interaction diagram of a method 900 for adjusting downlink transmission timing in some embodiments of the present application.
  • the method 900 may further include: S910 to S940, optionally Yes, the method 900 further includes S908 and S909.
  • the MT unit Before the timer expires, the MT unit receives third indication information from the fourth node, where the third indication information is used to instruct the MT unit to determine the timing adjustment amount.
  • the MT unit determines the timing adjustment amount according to the first indication information, and restarts the timer; the fourth node is the parent node of the first node in the wireless relay system.
  • the MT unit sends the timing adjustment amount information to the distributed unit DU of the first node.
  • the DU adjusts the downlink transmission timing according to the timing adjustment amount.
  • the MT unit receives the third indication information sent by the fourth node, and the third indication information is used to instruct the MT unit to determine the timing adjustment amount.
  • the fourth node is the parent node of the first node in the wireless relay system.
  • the MT unit determines the timing adjustment amount according to the third indication information, and restarts or starts the timer. That is to say, during the running period of the timer, if the MT unit receives the third indication information sent by the parent node for indicating the determination of the timing adjustment amount, the MT unit may use the third indication information after the timer expires. Determine the timing adjustment, and restart or start the timer.
  • the MT unit may receive the third indication information from the fourth node after the timer expires, that is, the MT unit does not receive the third indication information sent by the fourth node before the timer expires, After the timer expires, the MT unit receives the third indication information from the fourth node. After the timer expires, the MT unit determines the timing adjustment amount according to the third indication information, and restarts or starts the timer.
  • the steps shown in FIG. 11 may also include S908: the first node receives configuration information from the third node, the configuration information is used to configure the timer, and the MT unit may maintain the timer according to the configuration information.
  • S908 please refer to the above description of S708, which is not repeated here.
  • the steps shown in FIG. 11 may further include S909, where the first node receives timing adjustment information from the fourth node.
  • S909 For the description of S909, reference may be made to the above description of S209, which will not be repeated here.
  • the first node may determine the timing adjustment amount according to the timing adjustment amount information.
  • the third indication information may also be used to instruct the MT unit to determine the timing adjustment amount according to the timing adjustment amount information. That is, in S920, after the timer expires, the MT unit may determine the timing adjustment amount according to the timing adjustment amount information indicated by the first indication information.
  • the third indication information may further include a reference timing adjustment amount.
  • the MT unit may determine the timing adjustment amount according to the reference timing adjustment amount carried in the first indication information.
  • the first indication may not carry the reference timing adjustment amount, and the first indication information may also instruct the MT unit to determine the timing adjustment amount according to the timing adjustment information received before or after the timer expires.
  • the timing adjustment amount information may be received first, and the third indication information may be received after the timing adjustment amount information is received.
  • the third indication information may be received first, and then the timing adjustment amount information may be received. This application does not limit the order of the third indication information and the timing adjustment amount information.
  • timing adjustment amount information may be MAC RAR or MAC CE sent by the fourth node to the MT unit.
  • the timing adjustment amount information may also include the timing adjustment amount that the MT unit calculated by the fourth node needs to determine.
  • the timing adjustment amount may be determined according to the timing adjustment amount information, or the timing adjustment amount may also be determined according to the third indication information including the reference timing adjustment amount.
  • the MT unit may receive a lot of timing adjustment information, and only when the timing adjustment amount needs to be determined, does it determine how much downlink transmission timing needs to be adjusted according to the timing adjustment amount information.
  • the reference timing adjustment amount carried in the third indication information may be the adjustment amount calculated by the fourth node according to the timing adjustment amount carried in the timing adjustment information, or it may also be the TA sent by the fourth node to the MT unit last time. Or, it may also be the timing adjustment amount determined by the fourth node according to the TA sent to the MT unit last time.
  • the third indication information may be carried in any one of MAC RAR, MAC CE, adaptation layer information, DCI, and broadcast information sent by the fourth node to the MT unit.
  • the third indication information may also be carried in other possible signaling sent by the fourth node to the MT unit. This application is not restricted here.
  • the third indication information and the timing adjustment amount information may be sent in the same piece of signaling.
  • the third indication information and the timing adjustment amount information may be sent in different signaling. That is, the fourth node sends the third indication information and timing adjustment information to the MT unit respectively.
  • the DU unit sends fourth indication information to the second node, and the fourth indication information is used to indicate One or more of the following: the DU unit has adjusted the downlink transmission timing, the adjustment amount of the downlink transmission timing, the effective time of the downlink transmission timing, and the second node adjusts the second node to the child node of the second node The moment when the downlink signal is sent.
  • the second node can determine the time when it adjusts the downlink transmission timing with its own child nodes, or it can also determine the adjustment amount of the downlink transmission timing by itself. Therefore, the receiving performance of all terminal devices and sub-nodes served by the second node is improved. The accuracy and precision of the second node in adjusting the timing of downlink transmission are improved.
  • the first node includes MT unit and DU.
  • FIG. 12 is a schematic flowchart of a method 1000 for adjusting downlink transmission timing according to an embodiment of the present application. As shown in FIG. 12, the method 1000 shown in FIG. 12 may include S1010 to S1020. The steps in the method 1000 are described in detail below in conjunction with FIG. 12. The method 1000 includes:
  • the MT unit sends the timing adjustment value of the downlink transmission timing to the DU.
  • the DU determines whether to adjust the downlink transmission timing according to the timing adjustment amount.
  • the downlink transmission timing is the moment when the first node sends a downlink signal to the second node, the first node is a relay node in the wireless relay system, and the second node is the first node in the wireless relay system. Node's children
  • the MT unit may send the timing adjustment amount of the downlink transmission timing to the DU.
  • the MT unit may receive timing adjustment amount information or indication information sent by the parent node of the first node, where the timing adjustment amount information or indication information includes the timing adjustment amount.
  • the timing adjustment information may be MAC RAR or MAC CE, and the timing adjustment information may be TA carried in MAC RAR or MAC CE.
  • the MT unit may send the timing adjustment to the DU.
  • the DU performs or does not perform the downlink transmission timing according to the timing adjustment.
  • the DU may determine whether to adjust the downlink transmission timing by means such as a time threshold (timer), displayed indication information, and the like.
  • the specific judging process is similar to the process of determining and adjusting the downlink transmission timing by the first node in methods 200 to 500.
  • a time threshold timer
  • the specific description please refer to the description of adjusting the downlink transmission timing by the first node in methods 200 to 500. For brevity, here No longer.
  • the MT unit of the first node sends the acquired timing adjustment information to the DU of the first node, and the DU determines by itself whether to adjust the downlink transmission timing. For example, the DU determines whether to adjust the downlink transmission timing according to a timer and/or indication information. It can avoid adjusting the downlink transmission timing every time the DU receives timing adjustment information. Therefore, the receiving performance of all terminal devices and sub-nodes served by the first node is improved. Improved the accuracy and precision of DU adjusting the timing of downlink transmission.
  • the DU may send fourth indication information to the second node, and the fourth indication information is used to indicate one or more of the following: the DU has adjusted the downlink transmission timing , The adjustment amount of the downlink transmission timing, the effective time of the downlink transmission timing, and the second node adjusts the time when the second node sends the downlink signal to the child node of the second node.
  • the second node can determine the time when it adjusts the downlink transmission timing with its own child nodes, or it can also determine the adjustment amount of the downlink transmission timing by itself. Therefore, the receiving performance of all terminal devices and sub-nodes served by the second node is improved. The accuracy and precision of the second node in adjusting the timing of downlink transmission are improved.
  • the first node or DU determines whether to adjust the downlink transmission timing in addition to using a timer and indication information. , You can also use the timing adjustment threshold to determine whether to adjust the downlink transmission timing.
  • the first node or the DU in the first node this time Adjust the timing of downlink transmission;
  • the first node adjusts the downlink transmission timing this time.
  • the first threshold is equivalent to a timing adjustment threshold.
  • the first node receives multiple timing adjustments sent by the third node, and when the sum of the multiple timing adjustments (or the sum of absolute values) is greater than or When it is equal to the first threshold, the first node will adjust the downlink transmission timing for the N+1th time. Otherwise, the N+1th adjustment of the downlink transmission timing is not performed.
  • the first, the second, etc. are only used to indicate that multiple objects are different.
  • the first node and the second node are just to show different nodes. It should not have any influence on the node itself, and the above-mentioned first, second, etc. should not cause any limitation to the embodiments of the present application.
  • pre-set and pre-defined can be pre-stored in the device (for example, including terminal equipment and access network equipment). This application does not limit the specific implementation method.
  • FIG. 13 it is a schematic structural diagram of an apparatus 1200 provided by an embodiment of this application.
  • the device 1200 may correspond to the first node described in the foregoing method 200 to method 500, or may be a chip or component applied to the first node, and each module or unit in the device 1200 is used to execute the foregoing method 200 to method respectively
  • the various actions or processing procedures performed by the first node in 500 are shown in FIG.
  • the processing unit 1210, the communication unit 1220, and the storage unit 1230 are connected by a communication bus.
  • the processing unit 1210 is configured to maintain a timer, and the timer is used to control the time interval between two adjustments of the downlink transmission timing, and the downlink transmission timing is the time when the communication device sends a downlink signal to the second node;
  • the processing unit 1210 is further configured to: if the timer expires, adjust the downlink transmission timing and restart the timer; wherein, the communication device is a relay node in a wireless relay system, and the second node is the wireless relay system The child node of this communication device.
  • the communication device adjusts the downlink transmission timing only when the timer expires according to the limit of the timer. During the running of the timer or when it has not expired, the downlink transmission timing is not adjusted. Therefore, it is possible to prevent the communication device from adjusting the downlink transmission timing too frequently. This improves the receiving performance of all terminal equipment and sub-nodes served by the communication device. The accuracy and precision of the communication device in adjusting the timing of downlink transmission are improved.
  • the communication unit 1220 is configured to: receive configuration information from a third node, and the configuration information is used to configure the timer; the third node is the communication in the wireless relay system The parent node of the device or the host node in the wireless relay system.
  • the timer is used to control the communication device to adjust the time interval between the downlink transmission timing twice.
  • the adjusting the downlink transmission timing twice adjacently includes adjusting the downlink transmission timing for the first time and adjusting the downlink transmission timing for the second time; the processing unit 1210 is further configured to: After adjusting the downlink transmission timing for the second time, start or restart the timer; if the timer expires, adjust the downlink transmission timing for the second time and restart the timer.
  • the communication unit 1220 is further configured to: before the timer expires, receive first indication information from the fourth node, where the first indication information is used to instruct to adjust the downlink transmission timing ;
  • the processing unit 1210 is specifically configured to: before the timer expires, adjust the downlink transmission timing according to the first indication information, and restart the timer; the fourth node is the parent node of the communication device in the wireless relay system.
  • the communication unit 1220 is further configured to: before the timer expires, receive first indication information from the fourth node, where the first indication information is used to instruct to adjust the downlink transmission timing
  • the processing unit 1210 is specifically configured to: after the timer expires, adjust the downlink transmission timing according to the first indication information, and restart the timer; the fourth node is the parent of the first node in the wireless relay system node.
  • the communication unit 1220 is further configured to: the communication unit 1220 is further configured to: after the timer expires, receive first indication information from the fourth node, and the first indication information is used In the instruction to adjust the downlink transmission timing; the processing unit 1210 is specifically configured to: after the timer expires, adjust the downlink transmission timing according to the first indication information, and restart the timer; the fourth node is the wireless relay system The parent node of the first node in.
  • the communication unit 1220 is further configured to: receive timing adjustment information from the fourth node, and the first indication information is used to instruct to adjust the downlink transmission timing according to the timing adjustment information .
  • the communication unit 1220 is further configured to: after the communication device adjusts the downlink transmission timing, send second indication information to the second node, where the second indication information is used to indicate One or more of the following: the communication device has adjusted the downlink transmission timing, the adjustment amount of the downlink transmission timing, the effective time of the downlink transmission timing, and the second node adjusts the second node to the child node of the second node The moment when the downlink signal is sent.
  • the communication apparatus 1200 may be the first node in the embodiment of the present application.
  • the communication unit 1220 of the apparatus 1200 may include an antenna and a transceiver of the first node, for example, an antenna and a transceiver.
  • the communication unit 1220 may also include a network interface of the first node device.
  • the communication device 1200 may be a chip in the first node in the embodiment of the present application.
  • the communication unit 1220 may be an input or output interface, pin or circuit, or the like.
  • the storage unit 1230 may store a computer execution instruction of the method on the first node side, so that the processing unit 1210 executes the method on the first node side in the foregoing embodiment.
  • the storage unit 1230 can be a register, a cache or RAM, etc.
  • the storage unit 1230 can be integrated with the processing unit 1210; the storage unit 1230 can be a ROM or other types of static storage devices that can store static information and instructions.
  • the storage unit 1230 can be integrated with The processing unit 1210 is independent.
  • the transceiver may be integrated on the communication device 1200, for example, the communication unit 1220 integrates the transceiver and the network interface.
  • the communication unit 1220 may be a transceiver, an input/output interface, or an interface circuit.
  • the storage unit 1230 may be a memory.
  • the processing unit 1210 may be implemented by a processor. As shown in FIG. 14, the communication device 1300 may include a processor 1310, a memory 1320, and a transceiver 1330.
  • the communication device 1200 shown in FIG. 13 or the communication device 1300 shown in FIG. 14 can implement various embodiments of the foregoing method 200 to method 500 and the steps performed by the first node in the embodiments shown in FIGS. 4 to 7 .
  • the communication device 1200 shown in FIG. 13 or the communication device 1300 shown in FIG. 14 may be a relay node.
  • FIG. 15 it is a schematic structural diagram of an apparatus 1400 provided by an embodiment of this application.
  • the apparatus 1400 may correspond to the first node described in the foregoing method 600 to method 1000. Or, the MT unit or DU described in Method 600 to Method 1000.
  • the communication device includes an MT unit and a DU. It may also be a chip or component applied to the first node, or it may also be a chip or component applied to an MT unit or DU.
  • each module or unit in the device 1400 is used to execute each action or process performed by the MT unit and the DU in the above method 600 to method 1000.
  • the communication device 1400 may include: a processing unit 1410 And communication unit 1420.
  • the communication device 1400 further includes a storage unit 1430. The processing unit 1410, the communication unit 1420, and the storage unit 1430 are connected by a communication bus.
  • Processing unit 1410 used to maintain a timer, which is used to control the time interval between two timing adjustments for determining downlink transmission timing;
  • the processing unit 1410 is further configured to: if the timer expires, determine the timing adjustment amount, and restart the timer;
  • the communication unit 1420 is configured to: send the timing adjustment information to the DU;
  • the processing unit 1410 is further configured to: adjust the downlink transmission timing according to the timing adjustment amount;
  • the downlink transmission timing is the moment when the first node sends a downlink signal to the second node, the first node is a relay node in the wireless relay system, and the second node is the first node in the wireless relay system.
  • the child nodes of the node are the moment when the first node sends a downlink signal to the second node, the first node is a relay node in the wireless relay system, and the second node is the first node in the wireless relay system.
  • the communication unit 1420 is further configured to: receive configuration information from a third node, where the configuration information is used to configure the timer; the third node is the wireless relay system The parent node of the communication device or the host node in the wireless relay system.
  • the timer is used to control the time interval between the MT unit determining the timing adjustment twice.
  • determining the timing adjustment amount twice consecutively includes determining a first timing adjustment amount and determining a second timing adjustment amount
  • the processing unit 1410 is specifically configured to: determine the first timing Adjustment
  • the communication unit 1420 is specifically used for. Send the first timing adjustment to the DU unit, and start or restart the device; the processing unit 1410 is specifically configured to determine the second timing adjustment if the timer expires, and restart the timer; the processing unit 1410 specifically uses Yu: Adjust the downlink transmission timing according to the second timing adjustment amount.
  • the communication unit 1420 is further configured to: before the timer expires, receive third indication information from the fourth node, where the third indication information is used to indicate the determination of the timing adjustment amount
  • the processing unit 1410 is specifically configured to: before the timer expires, determine the timing adjustment amount according to the first indication information, and restart the timer; the fourth node is the parent node of the communication device in the wireless relay system .
  • the communication unit 1420 is further configured to: after adjusting the downlink sending timing, send fourth indication information to the second node, where the fourth indication information is used to indicate the following: Or multiple items: the downlink transmission timing, the adjustment amount of the downlink transmission timing, the effective time of the downlink transmission timing, and the second node adjusts the time when the second node sends the downlink signal to the child node of the second node.
  • the communication device 1400 may be the first node in the embodiment of the present application.
  • the communication unit 1420 of the apparatus 1400 may include an antenna and a transceiver of the first node, for example, an antenna and a transceiver.
  • the communication unit 1420 may also include a network interface of the first node device.
  • the communication device 1400 may be a chip in the first node in the embodiment of the present application, or a chip or component applied to an MT unit or a DU.
  • the communication unit 1420 may be an input or output interface, pin or circuit, or the like.
  • the storage unit 1430 may store computer-executable instructions of the MT unit and the DU method, so that the processing unit 1410 executes the MT unit and the DU method in the foregoing embodiment.
  • the storage unit 1430 can be a register, a cache or RAM, etc.
  • the storage unit 1430 can be integrated with the processing unit 1410; the storage unit 1430 can be a ROM or other types of static storage devices that can store static information and instructions.
  • the storage unit 1430 can be integrated with The processing unit 1410 is independent.
  • the transceiver may be integrated on the communication device 1400, for example, the communication unit 1420 integrates the transceiver and the network interface.
  • the communication unit 1420 may be a transceiver, an input/output interface, or an interface circuit.
  • the storage unit 1430 may be a memory.
  • the processing unit 1410 may be implemented by a processor. As shown in FIG. 16, the communication device 1500 may include a processor 1510, a memory 1520, and a transceiver 1530.
  • the communication device 1400 shown in FIG. 15 or the communication device 1500 shown in FIG. 16 can implement the various embodiments of the foregoing method 600 to method 1000 and the execution of the MT unit and the DU in the embodiments shown in FIG. 8 to FIG. step.
  • the description in the corresponding method please refer to the description in the corresponding method. To avoid repetition, I won’t repeat them here.
  • FIG. 17 is a schematic structural diagram of a communication device 1600.
  • the communication device may be the aforementioned first node.
  • the communication device is the aforementioned MT unit or DU.
  • the MT unit or the DU includes the communication device.
  • the communication device 1600 includes at least one processor 1611, at least one memory 1612, at least one transceiver 1613, at least one network interface 1614, and one or more antennas 1615.
  • the processor 1611, the memory 1612, the transceiver 1613 and the network interface 1614 are connected, for example, by a bus.
  • the antenna 1616 is connected to the transceiver 1613.
  • the network interface 1614 is used to connect the communication device to other communication devices through a communication link. In the embodiment of the present application, the connection may include various interfaces, transmission lines, or buses, which are not limited in this embodiment.
  • the memory 1612 may exist independently and is connected to the processor 1611.
  • the memory 1612 may also be integrated with the processor 1611, for example, integrated in a chip.
  • the memory 1612 can store program codes for executing the technical solutions of the embodiments of the present application, and is controlled by the processor 1611 to execute.
  • Various types of computer program codes that are executed can also be regarded as drivers of the processor 1611.
  • the processor 1611 is configured to execute the computer program code stored in the memory 1612, so as to implement the technical solutions in the embodiments of the present application.
  • the transceiver 1613 may be used to support the reception or transmission of radio frequency signals between the communication device and its child nodes or parent nodes, and the transceiver 1613 may be connected to the antenna 1616.
  • the transceiver 1613 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1616 can receive radio frequency signals, and the receiver Rx of the transceiver 1613 is used to receive the radio frequency signals from the antennas, and convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and convert the digital baseband signals.
  • the signal or digital intermediate frequency signal is provided to the processor 1611, so that the processor 1611 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing.
  • the transmitter Tx in the transceiver 1613 is also used to receive the modulated digital baseband signal or digital intermediate frequency signal from the processor 1611, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass it through a Or multiple antennas 1616 transmit the radio frequency signal.
  • the receiver Rx can selectively perform one or multiple down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal.
  • the sequence of the down-mixing processing and the analog-to-digital conversion processing is The order is adjustable.
  • the transmitter Tx can selectively perform one or multiple up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal.
  • the order of precedence is adjustable.
  • Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.
  • each unit in the above device can all be implemented in the form of software called by processing elements; they can also be implemented in the form of hardware; part of the units can be implemented in the form of software called by the processing elements, and some of the units can be implemented in the form of hardware.
  • each unit can be a separately established processing element, or it can be integrated in a certain chip of the device for implementation.
  • it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device.
  • the processing element may also be called a processor, and may be an integrated circuit with signal processing capability.
  • each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or implemented in a form of being called by software through a processing element.
  • the unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (ASIC), or, one or Multiple digital signal processors (digital signal processors, DSP), or, one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuits.
  • ASIC application specific integrated circuits
  • DSP digital signal processors
  • FPGA field programmable gate arrays
  • the unit in the device can be implemented in the form of a processing element scheduler
  • the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • Each of the above device embodiments can completely correspond to the first node or MT unit and DU in the method embodiment, and the corresponding module or unit executes the corresponding steps.
  • the receiving unit can It is the interface circuit used by the chip to receive signals from other chips or devices.
  • the above sending unit is an interface circuit of the device for sending signals to other devices.
  • the sending unit is the chip for sending signals to other chips or devices. The interface circuit.
  • An embodiment of the present application also provides a communication system, which includes the above-mentioned first node, second node, third node, and fourth node.
  • the embodiment of the present application also provides a computer-readable medium for storing computer program code, and the computer program includes instructions for executing the method for adjusting downlink transmission timing in the foregoing method 200 to method 1000 of the embodiment of the present application.
  • the readable medium may be read-only memory (ROM) or random access memory (RAM), which is not limited in the embodiment of the present application.
  • the computer program product includes instructions. When the instructions are executed, the first node, the MT unit, and/or perform the corresponding operations in the foregoing method.
  • the embodiment of the present application also provides a system chip.
  • the system chip includes a processing unit and a communication unit.
  • the processing unit may be, for example, a processor, and the communication unit may be, for example, an input/output interface, a pin, or a circuit.
  • the processing unit can execute computer instructions so that the chip in the communication device executes any of the methods for adjusting the timing of downlink transmission provided in the foregoing embodiments of the present application.
  • the computer instructions are stored in a storage unit.
  • the storage unit is a storage unit in the chip, such as a register, a cache, etc.
  • the storage unit may also be a storage unit in the terminal located outside the chip, such as a read-only memory (ROM).
  • ROM read-only memory
  • RAM random access memory
  • the processor mentioned in any one of the above may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits used to control the execution of the program of the above feedback information transmission method.
  • the processing unit and the storage unit can be decoupled, respectively set on different physical devices, and connected in a wired or wireless manner to realize the respective functions of the processing unit and the storage unit, so as to support the system chip to implement the above-mentioned embodiments Various functions in.
  • the processing unit and the memory may also be coupled to the same device.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be ROM, programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM) , EEPROM) or flash memory.
  • Volatile memory can be RAM, which acts as an external cache.
  • RAM static RAM
  • dynamic RAM dynamic RAM
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate Synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous link dynamic random access memory direct memory bus random access Access memory
  • direct rambus RAM direct rambus RAM
  • At least one refers to one or more.
  • Multiple means two or more.
  • And/or describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, both A and B exist, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are in an “or” relationship.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • At least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • words such as “first” and “second” are used to distinguish the same items or similar items with substantially the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • system and "network” in this article are often used interchangeably in this article.
  • character “/” in this text generally indicates that the associated objects before and after are in an “or” relationship.
  • uplink and downlink appearing in this application are used to describe the direction of data/information transmission in a specific scenario.
  • the "uplink” direction generally refers to the direction or distribution of data/information from the terminal to the network side.
  • the “downlink” direction generally refers to the direction in which data/information is transmitted from the network side to the terminal, or the direction from the centralized unit to the distributed unit.
  • uplink and downlink “It is only used to describe the direction of data/information transmission.
  • the specific start and end equipment of the data/information transmission is not limited.
  • the methods in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • the computer program or instruction can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server integrated with one or more available media.

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

La présente invention concerne un procédé de réglage du temps d'émission de liaison descendante. Le procédé comprend les étapes suivantes : un premier nœud maintient un temporisateur, le temporisateur étant utilisé pour commander un intervalle de temps entre deux réglages du temps d'émission de liaison descendante, et le temps d'émission de liaison descendante étant un moment où le premier nœud émet un signal de liaison descendante à un deuxième nœud ; si le temporisateur expire, le premier nœud règle le temps d'émission de liaison descendante et redémarre le temporisateur ; le premier nœud étant un nœud de relais dans un système de relais sans fil, et le deuxième nœud étant un sous-nœud du premier nœud dans le système de relais sans fil. Selon le procédé de réglage du temps d'émission de liaison descendante fourni dans la présente invention, un nœud IAB est empêché de régler fréquemment le temps d'émission de liaison descendante, et l'exactitude et la précision du réglage du temps d'émission de liaison descendante par le nœud IAB sont améliorées.
PCT/CN2020/080875 2019-03-28 2020-03-24 Procédé de réglage du temps d'émission de liaison descendante et dispositif de communication WO2020192653A1 (fr)

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