WO2019242755A1 - Procédé de transmission de données, dispositif de réseau, et dispositif terminal - Google Patents

Procédé de transmission de données, dispositif de réseau, et dispositif terminal Download PDF

Info

Publication number
WO2019242755A1
WO2019242755A1 PCT/CN2019/092338 CN2019092338W WO2019242755A1 WO 2019242755 A1 WO2019242755 A1 WO 2019242755A1 CN 2019092338 W CN2019092338 W CN 2019092338W WO 2019242755 A1 WO2019242755 A1 WO 2019242755A1
Authority
WO
WIPO (PCT)
Prior art keywords
network device
data
feedback
node
iab
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/092338
Other languages
English (en)
Chinese (zh)
Inventor
袁世通
朱元萍
李铕
戴明增
刘菁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2019242755A1 publication Critical patent/WO2019242755A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1621—Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a data transmission method, a network device, and a terminal device.
  • LTE relay technology is to deploy a relay node (RN) in the network to forward the base station (evolved universal terrestrial radio access to the network node (B) and user equipment (user) equipment, UE) can enhance network capacity, resolve backhaul connections between base stations, and solve coverage blind spots.
  • RN relay node
  • multi-hop wireless relay and multi-connection scenarios will be supported.
  • a multi-hop wireless relay networking scenario there are one or more relay nodes involved in data forwarding between the user equipment and the base station, and the number of relay nodes is the number of hops.
  • the relay node can be managed by hop-by-hop radio link control (RLC), that is, each relay node can directly use 5G / NR (new radio, NR)
  • RLC hop-by-hop radio link control
  • 5G / NR new radio, NR
  • ARQ Automatic Repeat Request
  • the ARQ mechanism can be hop-by-hop ARQ or end-to-end ARQ.
  • Different ARQ mechanisms operate on data differently. How to ensure effective data transmission under different ARQ mechanisms is a problem that needs to be solved. The problem.
  • the technical problem to be solved in the embodiments of the present application is to provide a data transmission method, a network device, and a terminal device, which can effectively perform data transmission under different ARQ mechanisms.
  • an embodiment of the present application provides a data transmission method.
  • a first network device receives first configuration information of a second network device, where the first configuration information includes at least one of the following information: ARQ feedback information, a node identifier of the first network device, an identifier of the first bearer, an identifier of a terminal device, a logical channel identifier, and an ARQ target node identifier; the first network device determines according to the first configuration information Whether to perform ARQ feedback.
  • the first network device determines whether to perform ARQ feedback based on the first configuration information of the second network device, and can effectively perform data transmission under different ARQ mechanisms.
  • the ARQ feedback information of the first bearer includes one of end-to-end feedback, hop-by-hop feedback, and feedback indication; the feedback indication is used to instruct the first network device to perform data on the first bearer. ARQ feedback or no ARQ feedback is performed on the data of the first bearer.
  • the ARQ feedback information of the first configuration information corresponds to one or more first bearers of the terminal device, or corresponds to all bearers of the terminal device.
  • the first configuration information may further include a transmission direction indication, and the transmission direction indication includes uplink transmission or downlink transmission.
  • whether the first network device determines whether to perform ARQ feedback according to the first configuration information includes:
  • the first network device sends the ARQ feedback.
  • the network device does not perform ARQ feedback, and forwards the data of the first bearer;
  • the first network device sends ARQ feedback when it receives data of the first bearer
  • the first network device determines whether to perform ARQ feedback on the data of the first bearer according to the feedback indication.
  • an embodiment of the present application provides a data transmission method.
  • a second network device determines first configuration information, and the second network device sends the first configuration information to the first network device.
  • the first configuration information includes the following information. At least one of the following: ARQ feedback information of a first bearer, a node identifier of the first network device, an identifier of the first bearer, an identifier of a terminal device, a logical channel identifier, and an ARQ target node identifier.
  • the second network device sends the first configuration information to the first network device, and the first network device determines whether to perform ARQ feedback based on the first configuration information, and can effectively perform data transmission under different ARQ mechanisms.
  • the ARQ feedback information of the first bearer includes one of end-to-end feedback, hop-by-hop feedback, and feedback indication; the feedback indication is used to instruct the first network device to perform data on the first bearer. ARQ feedback or no ARQ feedback is performed on the data of the first bearer.
  • the first configuration information may further include a transmission direction indication, and the transmission direction indication includes uplink transmission or downlink transmission.
  • an embodiment of the present application provides a data transmission method.
  • a first network device sends back indication information to a third network device, and the back indication information is used to notify the third network device to receive the backhaul data.
  • the return data is data belonging to a third network device that failed to be sent by the first network device; the first network device sends the return data to the third network device; the first network device Is an upper node of the third network device.
  • the third network device forwards the data to a higher-level node of the first network device via the first network device.
  • the higher-level node of the first network device fails to decode the data, and the first network device may forward the data to the third network device.
  • Sending back transmission instruction information and sending the data to the third network device, so that the third network device transmits the data to the receiving end through another path, and data retransmission recovery across multiple hops can be implemented.
  • the first network device after the first network device sends the backhaul indication information, it receives feedback information sent by the third network device.
  • the first network device stops receiving uplink data sent by the third network device.
  • an embodiment of the present application provides a data transmission method.
  • a terminal device receives third configuration information from a second network device, where the third configuration information includes retransmission instruction information, and the retransmission instruction information is used for Instruct the terminal device to perform data retransmission, and the retransmission instruction information includes a sequence number SN of a packet data unit PDU of a packet data convergence protocol PDCP layer; and the terminal device performs data retransmission of the PDCP PDU according to the retransmission instruction information. pass.
  • the second network device sends the third configuration information to the terminal device, and the terminal device performs data retransmission of the PDCP PDU according to the retransmission instruction information, which can effectively implement data retransmission and improve the utilization rate of air interface resources.
  • the retransmission indication information includes a cause value, and / or the number K of retransmission packets.
  • the performing, by the terminal device, data retransmission of PDCP and PDU according to the retransmission instruction information includes:
  • the terminal device retransmits data after all SNs according to the SN;
  • the data after all the SNs include packet data of all PDCP PDU packet data that are assigned a PDCP packet sequence number after the SN.
  • the performing, by the terminal device, data retransmission of PDCP and PDU according to the retransmission instruction information includes:
  • the terminal device retransmits the K data packets following the PDCP PDU sequence number after SN.
  • an embodiment of the present application provides a computer storage medium that stores a program, and when the program is executed, causes a terminal device to execute any one of the data transmission methods described in the first aspect.
  • an embodiment of the present application provides a computer storage medium that stores a program, and when the program is executed, causes a terminal device to execute any one of the data transmission methods described in the second aspect.
  • an embodiment of the present application provides a computer storage medium that stores a program, and when the program is executed, causes a terminal device to perform any one of the data transmission methods described in the third aspect.
  • an embodiment of the present application provides a computer storage medium that stores a program, and when the program is executed, causes a terminal device to perform any one of the data transmission methods described in the fourth aspect.
  • an embodiment of the present application provides a first network device, and the first network device has a function of implementing the behavior of the first network device in the data transmission method example described in the first aspect.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the functions described above.
  • an embodiment of the present application provides a second network device, and the second network device has a function of implementing the behavior of the second network device in the data transmission method example described in the second aspect.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the functions described above.
  • an embodiment of the present application provides a first network device, and the first network device has a function of implementing the behavior of the first network device in the data transmission method example described in the third aspect.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the functions described above.
  • an embodiment of the present application provides a terminal device that has a function of realizing the behavior of the terminal device in the data transmission method example described in the fourth aspect.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the functions described above.
  • an embodiment of the present application provides a first network device.
  • the first network device device may include a receiver, a processor, and a memory.
  • the processor is configured to support the first network device to perform the operations in the first aspect. The corresponding functions of the first network device in the data transmission method are described.
  • the receiver is used to communicate with other devices.
  • the memory is used for coupling with the processor, and it stores program instructions and data necessary for the first network device.
  • an embodiment of the present application provides a second network device.
  • the second network device device may include a transmitter, a processor, and a memory, and the processor is configured to support the second network device to perform the operations in the second aspect.
  • the corresponding functions of the second network device in the data transmission method are described.
  • the transmitter is used to communicate with other devices.
  • the memory is used for coupling with the processor, and it stores program instructions and data necessary for the second network device.
  • an embodiment of the present application provides a first network device.
  • the first network device device may include a transmitter, a processor, and a memory.
  • the processor is configured to support the first network device to perform the operations in the third aspect. The corresponding functions of the first network device in the data transmission method are described.
  • the transmitter is used to communicate with other devices.
  • the memory is used for coupling with the processor, and it stores program instructions and data necessary for the first network device.
  • an embodiment of the present application provides a terminal device.
  • the terminal device may include a receiver, a processor, and a memory.
  • the processor is configured to support the terminal device to execute the terminal device in the data transmission method according to the fourth aspect.
  • the receiver is used to communicate with other devices.
  • the memory is used for coupling with the processor, and it stores program instructions and data necessary for the first network device.
  • an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the data transmission method described in the first aspect.
  • an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the data transmission method described in the second aspect.
  • an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the data transmission method described in the third aspect.
  • an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the data transmission method described in the fourth aspect.
  • an embodiment of the present application provides a chip system.
  • the chip system includes a processor, which is used by a first network device to implement the functions involved in the first aspect, for example, generating or processing the functions described in the foregoing method.
  • the data and / or information involved are examples of the chipsets.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the first network device.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • an embodiment of the present application provides a chip system.
  • the chip system includes a processor, which is used by a second network device to implement the functions involved in the foregoing second aspect, for example, generating or processing the functions in the foregoing method.
  • the data and / or information involved are included in a twenty-second aspect.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the second network device.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • an embodiment of the present application provides a chip system.
  • the chip system includes a processor, which is used by a first network device to implement the functions involved in the third aspect, for example, generating or processing the functions described in the foregoing method.
  • the data and / or information involved are examples of the chipsets.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the first network device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • an embodiment of the present application provides a chip system.
  • the chip system includes a processor for a terminal device to implement the functions involved in the foregoing fourth aspect, for example, generating or processing the methods involved in the foregoing method. Data and / or information.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the terminal device.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • FIG. 1 is a schematic structural diagram of a data transmission system disclosed in an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a data transmission method disclosed in an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of another data transmission system disclosed in an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a user plane protocol stack disclosed in an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of another user plane protocol stack disclosed in an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another data transmission method disclosed in an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another data transmission method disclosed in an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a first network device disclosed in an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another first network device disclosed in an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a second network device disclosed in an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another second network device disclosed in an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a terminal device disclosed in an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of another terminal device disclosed in an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a data transmission system disclosed in an embodiment of the present application.
  • the data transmission system may include a terminal device, an integrated access node and a bachhaul node (IAB node), and a host base station (for example, IAB (donor), for example, the relay nodes in Figure 1 include: a first relay node (for example, IAB node 1), a second relay node (for example, IAB node 2), and a third relay node (for example, IAB node 3) Fourth relay node (for example, IAB node 4).
  • the terminal device establishes a communication connection with IAB node 1
  • IAB node 1 establishes a communication connection with IAB node 2 and IAB node 3
  • IAB node 2 establishes a communication connection with IAB node 4
  • IAB node 3 establishes a communication connection with IAB node 4
  • the IAB node establishes a communication connection with the IAB donor.
  • the link between IAB node 4 and IAB donor can be a Backhaul (BH) link
  • the link between the terminal device and IAB node 1 can be an Access (AC) link.
  • BH Backhaul
  • AC Access
  • the device transmits data or signals to the network.
  • the device includes terminals, IAB nodes, etc.
  • the device receives data or signals transmitted by the network. Similarly, the device includes a terminal, an IAB node, and so on.
  • Upper-level node A node that receives data or signals during uplink transmission, or a node that sends data or signals during downlink transmission.
  • IAB node 1 is a higher-level node of a terminal device
  • IAB node 2 is a higher-level node of IAB node 1. analogy.
  • superior nodes the nodes that forward data after the sending node are all referred to as superior nodes, that is, the superior node is not limited to the direct superior node, and the direct superior node refers to the node that directly receives data during the upstream transmission without After forwarding by other nodes, or during downlink transmission, the direct data sending node of the data receiving node, without forwarding by other nodes.
  • Lower-level nodes Nodes that send data or signals during uplink transmission, or nodes that receive data or signals during downlink transmission.
  • IAB node 1 is a lower-level node of IAB node 2
  • IAB node 2 is a lower-level node of IAB node 4.
  • all nodes that send or forward data to the data receiving node through the data sending node are called lower nodes, that is, the lower nodes are not limited to the direct lower nodes, and the direct lower nodes refer to the data sent during the uplink transmission.
  • the terminal device can transmit the data to the IAB through the IAB node1, IAB node2, and IABnode4, where IABnode1 is the terminal device's The superior node (ie, the parent node), IAB node 2 is the superior node of IAB node 1, IAB node 4 is the superior node of IAB node 2, and IAB donor is the superior node of IAB node 4.
  • the terminal device can transmit data to the IAB through IAB node 1, IAB node 3, and IAB node 4, in which IAB node1 is the upper node of the terminal device, and IAB node 3 is IAB node1 , IAB node 4 is the superior node of IAB node 3, and IAB donor is the superior node of IAB node 4.
  • the network device sends data to a User Plane Function (UPF), a serving gateway (SGW) device, or a public data network gateway (PGW) device in the 5G network.
  • UPF User Plane Function
  • SGW serving gateway
  • PGW public data network gateway
  • the IAB donor After the IAB donor receives the downlink data from the UPF, SGW device, or PGW device, it can transmit the downlink data to the terminal device. In one possible implementation, the IAB donor can sequentially pass the data through IAB node 4, IAB node 2 and IAB. Node 1 is transmitted to the terminal equipment, among which IAB node 4 is the superior node of IAB donor, IAB node 2 is the superior node of IAB node 4, IAB node 1 is the superior node of IAB node 2, and the terminal device is the superior node of IAB node 1.
  • the IAB donor can transmit data to the terminal device through IAB node 4, IAB node 3, and IAB node 1, in which IAB node 4 is the superior node of the IAB donor, and IAB node 3 is the IAB node 4 IAB node 1 is the upper node of IAB node 3, and the terminal device is the upper node of IAB node 1.
  • ARQ checks the data of the sender at the data receiver to confirm whether the transmission is correct. If the data of the sender is received correctly, it sends an Acknowledgement (ACK) signal to the sender. If the receiver cannot receive the transmission correctly, The data sent by the sender sends a Not-acknowledgement (NACK) signal to the sender. Checking the data includes performing a CRC check on the data or not receiving a certain data packet within a certain period of time. For example, if the second relay node does not successfully receive the data sent by the first relay node, it sends a NACK signal to the second node to the first node. After receiving the NACK, the first node retransmits the data through ARQ.
  • the automatic retransmission request may include hop-by-hop ARQ and end-to-end ARQ.
  • Hop-by-hop ARQ means that the transmission result is immediately fed back to the sender for each received data packet. For example, after receiving the first data from the first relay node, the second relay node will decode it. If the decoding is successful, If yes, return ACK signal; if decoding fails, return NACK signal. After the first relay node receives the ACK signal from the second relay node, it sends the second data to the second relay node, and deletes the first data from the buffer of the first relay node; When the relay node receives the NACK signal from the second relay node, the first relay node resends the first data.
  • the cache in the embodiment of the present application may be an RLC cache.
  • End-to-end ARQ means that the intermediate node does not decode and feedback the received data. After the intermediate node receives the data, it forwards the received data. After receiving the data, the destination node checks the received data. And feedback the receiving result to the sending source of the data. If the target node receiving the data fails the check or waits too long, it returns a NACK. If the data is received correctly, it returns an ACK.
  • the first relay node receives the ACK signal from the second relay node, and deletes the data that the second relay node has decoded successfully from the cache of the first relay node. If an ACK is performed, After feedback, a link abnormality occurs on the second relay node, and the data successfully decoded by the second relay node cannot continue to be sent to the superior node, that is, the data sent by the first relay node to the second relay node cannot be transmitted on the first relay node. Resume or retransmit.
  • the intermediate node does not feed back the ACK / NACK signal, only the receiving end will feed back the ACK / NACK signal. If the target node receiving the data feeds back the NACK signal, the sending end cannot determine the specific failed link. Retransmitting data to the target node through the original intermediate nodes may also cause data failure, which will result in the waste of air interface transmission resources of the intermediate nodes and reduce the utilization of air interface resources.
  • the first network device receives the first configuration information of the second network device, and the first network device determines whether to perform ARQ feedback according to the first configuration information.
  • the first network device may be the IAB node in FIG. 1, for example, it may be IAB node 1 or IAB node 4, and the second network device may be the IAB node in FIG. 1.
  • the first configuration information includes at least one of the following information: ARQ feedback information of the first bearer, a node identifier of the first network device, an identifier of the first bearer, an identifier of the terminal device, a logical channel identifier, and an ARQ target node identifier.
  • a relay node requiring ARQ feedback can be configured based on the IAB donor. Then, other relay nodes in the transmission path can directly forward the data sent by the lower node to the upper node, and can perform data retransmission recovery across multiple hops. And it is not necessary for the sending end to resend data to the receiving end through each intermediate node, thereby improving the utilization rate of air interface resources.
  • the sending end when the sending end is a terminal device, the receiving end may be an IAB donor; when the sending end is an IAB donor, the receiving end may be a terminal device.
  • GSM Global System
  • CDMA Code Division Multiple Access
  • Wideband Code Division Multiple Access Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • 5G 5th-generation mobile communication technology
  • 5G 5G New Radio (NR) communication system.
  • the IAB donor may be a device for communicating with a mobile station, and may specifically be an access point (AP) in a wireless local area network (WLAN), a global mobile communication system (AP Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) base transceiver stations (Base Transceiver Station (BTS)), Wideband Code Division Multiple Access (Wideband Code Division Multiple Access) NodeB (NB), Evolutional NodeB (eNB) in LTE system, relay station or access point, in-vehicle equipment, wearable equipment, access network equipment in future 5G networks, and future evolutionary public Any one of access network equipment in a land mobile network (Public Land Mobile Network, PLMN).
  • PLMN Public Land Mobile Network
  • the terminal equipment can also be referred to as User Equipment (UE), mobile station, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile device, terminal, wireless communication device, user agent Or a user device, etc., which may specifically be a station (Station, ST) in WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, Personal Digital Processing (PDA), handheld devices with wireless communication capabilities, computing devices, other processing devices connected to wireless modems, in-vehicle devices, wearable devices, mobile stations in the future 5G network, and future evolved PLMNs Any of the terminal devices and the like in the network.
  • UE User Equipment
  • FIG. 2 is a data transmission method provided by an embodiment of the present application. The method includes, but is not limited to, the following steps:
  • Step S201 The second network device sends the first configuration information to the first network device.
  • the first network device may be IAB node 1
  • the third network device may be IAB node 2 or IAB node 4, or the first network device may be IAB node 2, the third network device may be IAB node 4, and the third network device may be a superior node of the first network device.
  • the IAB donor can send the first configuration information to the first network device.
  • the IAB donor before the terminal device transmits uplink data to the IAB donor, the IAB donor can send to all or part of the intermediate nodes (i.e., one or more of IAB node1, IABnode2, and IABnode4).
  • the intermediate nodes i.e., one or more of IAB node1, IABnode2, and IABnode4.
  • the first network device may be IAB node 4, and the third network device may be IAB node 2 or IAB node 1; or the first network device may be IAB node 2, the third network device may be IAB node 1, and the third network device may be a lower node of the first network device.
  • the IAB donor may send the first configuration information to the IAB node 4.
  • the IAB donor before the IAB donor transmits downlink data to the terminal device, the IAB donor can send it to all or part of the intermediate nodes (that is, one or more of IAB node 4, IAB node 2, and IAB node 1). First configuration information.
  • the first configuration information may include at least one of the following information: ARQ feedback information of the first bearer, a node identifier of the first network device, an identifier of the first bearer, an identifier of a terminal device, a logical channel identifier, and an ARQ target node.
  • the first bearer may include a data radio bearer (DRB) for the terminal device, a signal radio bearer (SRB) for the terminal device, or a radio bearer (RB) for the IAB donor.
  • the node identifier of the first network device may be an Internet Protocol (IP) address or a media access control (MAC) address, etc., used to uniquely identify the first network. Equipment, this application does not limit the node identification.
  • IP Internet Protocol
  • MAC media access control
  • the identification of the first bearer may be an identification number (ID) of the first bearer, which is used to uniquely identify the first bearer.
  • the identification of the terminal device can be the IP address, MAC address, international mobile equipment identity (IMEI) of the terminal device, or international mobile subscriber identity (IMSI), etc., which is used to uniquely identify the device Terminal equipment.
  • the identification of the terminal equipment is not limited in this application.
  • the logical channel identifier may be an ID of the logical channel, which is used to uniquely identify the logical channel, and the logical channel of the terminal device corresponds to the bearer one-to-one.
  • the ARQ target node identifier may include the node identifier of an intermediate node that needs to perform ARQ feedback.
  • the node identifier may be a node name, an IP address, a MAC address, a physical cell identifier (PCI), and a global cell identifier (Cell Global Identifier). , CGI) or NR Global Cell Identifier (NCGI), etc., used to uniquely identify the intermediate node.
  • PCI physical cell identifier
  • NCGI NR Global Cell Identifier
  • the ARQ feedback information of the first bearer may include one of end-to-end feedback, hop-by-hop feedback, and feedback indication.
  • the feedback indication is used to instruct the first network device to perform ARQ feedback on the data of the first bearer or to the first bearer.
  • the data is not subjected to ARQ feedback.
  • the end-to-end feedback or the hop-by-hop feedback may be configured by the system by default, or may be configured by a second network device, which is not specifically limited by the embodiment of the present application.
  • the first configuration information is configured for the first bearer and can be configured for each IAB node, therefore, two IAB nodes can be made to be endpoints on the first bearer, that is, two IAB nodes perform ARQ feedback.
  • the sender and receiver, and the IAB node between the two IAB nodes does not need to perform ARQ feedback, only data forwarding is needed, making the configuration of ARQ more flexible.
  • IAB node 1 and IAB node 4 can be configured as receivers and senders of ARQ feedback. After receiving the first bearer data sent by IAB node 1, IAB node 4 determines to perform ARQ feedback according to the first configuration information. IAB node 1 receives the feedback sent by IAB node 4, and IAB node 2 between IAB node 1 and IAB node 4 does not require feedback, only data forwarding is required.
  • the ARQ feedback information of the first configuration information corresponds to one or more first bearers of the terminal device, or corresponds to all bearers of the terminal device.
  • the number of terminal devices in the embodiments of the present application may be one or more, which is not limited in the present application. Since a terminal device can have multiple bearers, one or a part of them can be specified to perform ARQ feedback and / or reception on an IAB node, or it can be specified to perform ARQ feedback and / or all bearers of a terminal device. Or the granularity of ARQ feedback and / or reception is configurable, depending on the implementation, which is not limited in this application.
  • Step S202 The first network device receives data from the third network device.
  • the first network device is IAB node 1
  • the third network device is the terminal device.
  • the IAB donor sends the first configuration information to the IAB node 1.
  • the IAB node 1 can receive the uplink data of the first bearer of the terminal device.
  • the terminal device transmits upstream data to the IAB through the IAB node 1, IAB node 2, and IAB node 4, the first network device is IAB node 2, the third network device is IAB node 1, and the IAB node sends the first configuration to IAB node 2. information.
  • the terminal device sends the uplink data of the first bearer to the IAB node 2 through the IAB node 1, the IAB node 2 can receive the uplink data of the first bearer of the IAB node 1.
  • the IAB donor transmits downlink data to the terminal device via IAB node 4, IAB node 2, and IAB node 1, the first network device is IAB node 4, and the third network device is IAB donor.
  • the IAB donor sends the first configuration information to the IAB node 4.
  • the IAB node 4 receives the downlink data of the first bearer of the IAB donor.
  • the IAB donor transmits downlink data to the terminal device via IAB node 4, IAB node 2, and IAB node 1, the first network device is IAB node 2, the third network device is IAB node 4, and the IAB donor sends the first configuration to IAB node 2. information. After the IAB donor sends the downlink data of the first bearer to the IAB node 2 through the IAB node 4, the IAB node 2 receives the downlink data of the first bearer of the IAB node 4.
  • Step S203 The first network device determines whether to perform ARQ feedback according to the first configuration information.
  • the first network device sends ARQ feedback, and if the identifier of the first network device and the ARQ The target node identifier is different, and the first network device does not perform ARQ feedback and forwards the data carried by the first bearer.
  • the first network device receives data sent by the third network device, according to the first configuration information, whether a bearer corresponding to the received data is configured. If the bearer corresponding to the data is configured, determine whether ARQ feedback is required according to the ARQ feedback information of the first bearer of the first bearer in the first configuration information. If feedback is required, perform ARQ ACK or NACK according to the result of data reception. Feedback; or if the ARQ target node identifier in the first configuration information is the same as the node identifier of the first network device, feedback is also required. If the first network device does not need to perform ARQ feedback on the received data, the first network device performs data forwarding according to the ARQ target node identifier in the first configuration information.
  • the ARQ feedback mode of the first network device is the default, that is, the end-to-end ARQ feedback or the hop-by-hop ARQ feedback mode is the default, as defined by the protocol, the ARQ feedback information of the first bearer is not necessary
  • the IAB node only needs to determine whether to feedback through the ARQ target node identification and the default ARQ feedback method. Specifically, if the default ARQ feedback method is end-to-end, then the node ID of the IAB node and the ARQ target node identifier are different, and the data is forwarded; if the default ARQ feedback method is hop-by-hop feedback, this IAB node will Perform ARQ feedback.
  • the IAB node 1 determines that the ARQ feedback information includes end-to-end feedback, and the ARQ target node identifier is IAB donor. After receiving the uplink data of the first bearer of the terminal device, the IAB node 1 does not perform ARQ feedback, but directly forwards the uplink data of the first bearer to the IAB node 2.
  • IAB node 2 Because IAB node 2 is not the target node, IAB node 2 does not perform ARQ feedback, but directly forwards the uplink data of the first bearer to IAB node 4. Similarly, after IAB node 4 receives the data, it forwards the data to the IAB node.
  • the IAB donor can decode the received data. If the decoding is successful, the IAB donor sends an ACK signal to the terminal device. If the decoding fails, the IAB donor sends a NACK signal to the terminal device.
  • the IAB node1 can choose a new transmission path for data retransmission. .
  • the sending end of the data since the sending end of the data stores the sent data in a cache, if a non-acknowledgment feedback is received, the data can be retransmitted to ensure the reliable transmission of the data.
  • the IAB donor transmits downlink data to the terminal device via IAB node 4, IAB node 2, and IAB node 1, the first network device is IAB node 4, and the third network device is IAB donor.
  • the IAB node 4 determines that the ARQ feedback information includes end-to-end feedback, and the ARQ target node is identified as a terminal device.
  • the IAB node 4 receives the downlink data of the first bearer of the IAB donor, the IAB node 4 does not perform ARQ feedback, but forwards the downlink data of the first bearer to the IAB node 2.
  • IAB node 2 does not perform ARQ feedback, and forwards the downlink data of the first bearer to IAB node 1. After receiving the data, IAB node 1 forwards the data to the terminal device. The terminal device decodes the received data. If the decoding is successful, the terminal device sends an ACK signal to the IAB donor. If the decoding fails, the terminal device sends the IAB donor. NACK signal. After the IAB donor receives the NACK signal, it retransmits the data.
  • the first network device sends ARQ feedback when it receives data of the first bearer.
  • a terminal device transmits uplink data to the IAB through the IAB node 1, IAB node 2, and IAB node 4, the first network device is IAB node 4, and the third network device is IAB node 2.
  • the IAB donor sends the first configuration information to the IAB node 4.
  • the IAB node 4 determines that the ARQ feedback information includes hop-by-hop feedback based on the first configuration information, and the ARQ target node identifier is the IAB donor.
  • IAB node1 sends an ACK or NACK to the terminal device.
  • IAB node1 forwards the uplink data of the first bearer to IAB node2.
  • IAB node 2 sends an ACK or NACK to IAB node 1.
  • IAB node 2 forwards the uplink data of the first bearer to IAB node 4.
  • IAB node 4 sends an ACK or NACK to IAB node 2.
  • the data is forwarded to the IAB donor.
  • each IAB node receives an ACK signal from a superior node, it deletes the corresponding data in the cache, and if it receives a NACK signal from the superior node, it resends the data.
  • the IAB donor transmits downlink data to the terminal device via IAB node 4, IAB node 2, and IAB node 1, the first network device is IAB node 1, and the IAB node sends to IAB node 1.
  • the first configuration information The IAB node 1 determines that the ARQ feedback information includes hop-by-hop feedback based on the first configuration information, and the ARQ target node is identified as a terminal device.
  • the IAB donor sends the downlink data of the first bearer to the IAB node 4
  • the IAB node 4 sends an ACK or NACK to the IAB donor. If the decoding is successful, the downlink data of the first bearer is forwarded to the IAB node 2.
  • IAB node 2 sends an ACK or NACK to IAB node 4, and if the decoding is successful, it forwards the downlink data of the first bearer to IAB node 1. After receiving data, IAB node 1 sends an ACK or NACK to IAB node 2. If the decoding is successful, the downlink data of the first bearer is forwarded to the terminal device.
  • each IAB node receives an ACK signal from a superior node, it deletes the corresponding data in the cache, and if it receives a NACK signal from the superior node, it resends the data.
  • the first network device determines whether to perform ARQ feedback on the data of the first bearer according to the feedback indication.
  • the IAB node determines whether to perform feedback on the data of the first bearer according to the feedback instruction.
  • ARQ feedback based on feedback indication can be configured for any node, and two IAB nodes can be configured as end nodes for ARQ feedback. The IAB between two end nodes does not need Perform ARQ feedback.
  • the so-called end node refers to a pair of nodes that need to perform ARQ feedback and ARQ reception.
  • the end node can be determined by the identity of the first bearer, the identity of the terminal device, and the ARQ feedback information of the first bearer. If the IAB node is configured to perform ARQ feedback on a bearer of a certain terminal device, it is an end node.
  • a terminal device transmits uplink data to the IAB through the IAB node 1, IAB node 2, and IAB node 4, the first network device is IAB node 1, and IAB node 1 is based on the first configuration.
  • the information determines that the ARQ feedback information includes a feedback indication, and the feedback indication is used to instruct the first network device to perform ARQ feedback on the first bearer of the terminal device.
  • IAB node 1 After receiving the uplink data of the first bearer of the terminal device, IAB node 1 sends an ACK or NACK to the terminal device. If the decoding is successful, IAB node 1 forwards the uplink data of the first bearer to IAB node 2 and sends the received data to the IAB node 2.
  • the data is cached. Since the feedback indication is used to instruct IAB node 2 not to perform ARQ feedback, IAB node 2 may not perform ARQ feedback, but directly forward the uplink data of the first bearer to IAB node 4. Since the feedback indication is used to instruct IAB node 4 to perform ARQ feedback, IAB node 4 can decode the received data after receiving the data. If the decoding is successful, IAB node 4 sends an ACK signal to IAB node 2 or IAB node 1; If the decoding fails, IAB node 4 sends a NACK signal to IAB node 2 or IAB node 1. IAB node 1 can choose a new transmission path for data retransmission.
  • the IAB node 4 if the IAB node 4 sends a NACK signal to the IAB node 2, the IAB node 2 can send the NACK signal to the IAB node 1, and the IAB node 1 can choose a new transmission path for data retransmission, for example, IAB node 1 Data is transmitted to IAB through IAB node 3 and IAB node 4, without the need for terminal equipment to retransmit data to IAB donor through each intermediate node, which can improve air interface resource utilization.
  • the IAB donor transmits downlink data to the terminal device via IAB node 4, IAB node 2, and IAB node 1, the first network device is IAB node 4, and IAB node 4 is based on the first configuration.
  • the information determines that the ARQ feedback information includes a feedback indication, and the feedback indication is used to instruct the first network device to perform ARQ feedback.
  • the IAB node 4 After receiving the downlink data of the first bearer of the IAB donor, the IAB node 4 sends an ACK or NACK to the IAB donor. If the IAB node 4 decodes successfully, it forwards the downlink data of the first bearer to the IAB node 2 and buffers the data.
  • IAB node 2 Since the feedback instruction is used to instruct IAB node 2 not to perform ARQ feedback, IAB node 2 may not perform ARQ feedback, but directly forward the downlink data of the first bearer to IAB node 1. Because the feedback indication is used to instruct IAB node 1 to perform ARQ feedback, IAB node 1 can decode the received data after receiving the data. If the decoding is successful, IAB node 1 sends an ACK signal to IAB node 2 or IAB node 4. If the decoding fails, IAB node 1 sends a NACK signal to IAB node 2 or IAB node 4. IAB node 4 can choose a new transmission path for data retransmission.
  • IAB node 1 sends a NACK signal to IAB node 2
  • IAB node 2 can send the NACK signal to IAB node 4
  • IAB node 4 can choose a new transmission path for data retransmission, such as IAB node 4
  • the data is transmitted to the terminal device through IAB node 3 and IAB node 1, without the need for the IAB donor to retransmit the data to the terminal device through each intermediate node, which can improve the air interface resource utilization.
  • the first configuration information may further include a transmission direction indication, and the transmission direction indication includes uplink transmission or downlink transmission. If the transmission direction indication includes uplink transmission, the first network device determines whether to perform ARQ feedback according to the first configuration information only when receiving the uplink data. If the transmission direction indication includes downlink transmission, the first network device determines whether to perform ARQ feedback according to the first configuration information only when receiving the downlink data.
  • the transmission direction indication may be configured for one bearer, multiple bearers, or all bearers of a terminal device. It should be understood that due to different transmission directions, the uplink transmission path and the downlink transmission path to the same terminal device may be different. The ARQ feedback and the data transmission direction path should be the same, but the directions are opposite. Because the path of uplink data transmission and downlink data transmission may not have the same IAB node, and the feedback is for data transmission, the path of ARQ feedback needs to be the same as the path of data transmission, but in the opposite direction.
  • the second network device sends first configuration information to the first network device, the first network device receives data from the third network device, and the first network device determines whether to perform ARQ feedback according to the first configuration information. , Can effectively achieve data retransmission and improve the utilization of air interface resources.
  • FIG. 3 is a schematic structural diagram of a data transmission system disclosed in an embodiment of the present application.
  • the data transmission system may include a terminal device, an IAB node, and a host base station (for example, an IAB donor).
  • the relay nodes include a first relay node (for example, IAB node 1), a second relay node (for example, IAB node 2), and a third relay node (for example, IAB node 3).
  • the terminal device establishes a communication connection with IAB node 3
  • IAB node 3 establishes a communication connection with IAB node 2 and IAB node 1, respectively
  • IAB node 2 establishes a communication connection with IAB donor
  • IAB node 1 establishes a communication connection with IAB donor.
  • the link between IAB node 2 and IAB donor can be a BH link
  • the link between IAB node 1 and IAB donor can be a BH link
  • the link between a terminal device and IAB node 3 can be an AC link .
  • the terminal device can transmit the data to the IAB through the IAB node 3 and IAB node 2, in which IAB node 3 is the upper node of the terminal device (that is, Parent node), IAB node 2 is the superior node of IAB node 3, and IAB donor is the superior node of IAB node 2.
  • the terminal device can transmit data to the IAB through IAB node 3 and IAB node 1, in which IAB node 3 is the upper node of the terminal device, and IAB node 1 is the upper node of IAB node 3 , IAB donor is the superior node of IAB node 1. Further, the IAB donor can send uplink data to the GW device.
  • the IAB donor After the IAB donor receives the downlink data from the gateway device, it can transmit the downlink data to the terminal device.
  • the IAB donor can transmit the data to the terminal device in turn via IAB node 2 and IAB node 3, among which IAB Node 2 is the superior node of IAB donor, IAB node 3 is the superior node of IAB node 2, and the terminal device is the superior node of IAB node 3.
  • the IAB donor can transmit data to the terminal device in turn via IAB node1 and IAB node3, where IAB node1 is the superior node of the IAB donor, and IAB node3 is the superior node of the IAB node1
  • the terminal equipment is the superior node of IAB node 3.
  • ARQ checks the data of the sender at the data receiver to confirm whether the transmission is correct. If the data of the sender is received correctly, it sends an ACK signal to the sender. If the receiver cannot correctly receive the data sent by the sender, A NACK signal is sent to the sender. Checking the data includes performing a CRC check on the data or not receiving a certain data packet within a certain period of time. For example, if the second relay node does not successfully receive the data sent by the first relay node, it sends a NACK signal to the second node to the first node. After receiving the NACK, the first node retransmits the data through ARQ.
  • the automatic retransmission request may include hop-by-hop ARQ and end-to-end ARQ.
  • Hop-by-hop ARQ means that the transmission result is immediately fed back to the sender for each received data packet. For example, after receiving the first data from the first relay node, the second relay node will decode it. If the decoding is successful, If yes, return ACK signal; if decoding fails, return NACK signal. After the first relay node receives the ACK signal from the second relay node, it sends the second data to the second relay node, and deletes the first data from the buffer of the first relay node; When the relay node receives the NACK signal from the second relay node, the first relay node resends the first data.
  • End-to-end ARQ means that the intermediate node does not decode and feedback the received data. After the intermediate node receives the data, it forwards the received data. After receiving the data, the destination node checks the received data. And feedback the receiving result to the sending source of the data. If the target node receiving the data fails the check or waits too long, it returns a NACK. If the data is received correctly, it returns an ACK.
  • the first relay node receives the ACK signal from the second relay node, and deletes the data that the second relay node has decoded successfully from the cache of the first relay node. If an ACK is performed, After feedback, a link abnormality occurs on the second relay node, and the data successfully decoded by the second relay node cannot continue to be sent to the superior node, that is, the data sent by the first relay node to the second relay node cannot be transmitted on the first relay node. Resume or retransmit.
  • the intermediate node does not feed back the ACK / NACK signal, only the receiving end will feed back the ACK / NACK signal. If the target node receiving the data feeds back the NACK signal, the sending end cannot determine the specific failed link. Retransmitting data to the target node through the original intermediate nodes may also cause data failure, which will result in the waste of air interface transmission resources of the intermediate nodes and reduce the utilization of air interface resources.
  • the first network device sends a return instruction information to the third network device, and the return instruction information is used to notify the third network device to receive the return data, and the return data belongs to the third that the first network device fails to send.
  • the first network device may be IAB node 2 in FIG. 1, and the third network device may be IAB node 3 in FIG. 1. IAB node 2 is the superior node of IAB node 3.
  • IAB node 3 sends data to IAB node 2, IAB node 2 decodes the data successfully, IAB node 2 sends an ACK signal to IAB node 3, and IAB node 3 deletes the data stored in the cache of IAB node 3 .
  • IAB node 2 forwards this data to IAB donor, IAB donor fails to decode the data, IAB donor sends NACK signal to IAB node 2, IAB node 2 can send back instruction information to IAB node 3, and send this message to IAB node 3 Data, so that IAB node 3 transmits the data to the IAB donor through other paths. For example, IAB node 3 transmits the data to the IAB donor through IAB node 1 to perform data retransmission recovery across multiple hops.
  • FIG. 4 is a data transmission method provided by an embodiment of the present application. The method includes, but is not limited to, the following steps:
  • Step S401 The first network device sends back transmission instruction information to the third network device.
  • the terminal device transmits uplink data to the IAB through the IAB node 3 and IAB node 2
  • the first network device may be IAB node 2
  • the third network device may be IAB node 3.
  • the first network device is an upper node of the third network device.
  • IAB node 3 sends uplink data to IAB node 2.
  • IAB node 2 decodes the uplink data successfully.
  • IAB node 2 sends an ACK signal to IAB node 3.
  • IAB node 3 deletes the data stored in the cache of IAB node 3.
  • IAB node 2 forwards the upstream data to the IAB donor.
  • the IAB donor fails to decode the upstream data.
  • the IAB donor sends a NACK signal to the IAB node 2.
  • the IAB node 2 can send back instruction information to the IAB node 3.
  • the return instruction information is used for The IAB node 3 is notified to receive the return data, and the return data is the above uplink data.
  • the first network device may be IAB node 2
  • the third network device may be IAB donor.
  • a network device is a lower node of a third network device.
  • the IAB donor sends the downlink data to the IAB node 2.
  • the IAB node 2 decodes the downlink data successfully.
  • the IAB node 2 sends an ACK signal to the IAB donor.
  • the IAB donor deletes the downstream data stored in the buffer of the IAB donor.
  • IAB node 2 forwards the downlink data to IAB node 3.
  • IAB node 3 fails to decode the downlink data.
  • IAB node 3 sends a NACK signal to IAB node 2.
  • IAB node 2 can send back instruction information to the IAB node. The information is used to notify the IAB donor to receive the backhaul data, and the backhaul data is the above-mentioned downlink data.
  • the first network device may receive the second configuration information forwarded by the IAB donor via the third network device, and the second configuration information includes First indication information, where the first indication information is used to instruct the first network device to send back indication information when receiving a NACK signal.
  • the IAB donor when the IAB donor determines that the link is abnormal, it may actively generate the second configuration information, transmit the second configuration information to a third network device, and the third network device transmit the second configuration information to the first network. It may also be that the first network device sends link abnormality indication information to the third network device. After the third network device forwards the link abnormality indication information to the IAB donor, the IAB donor generates second configuration information and sends the second configuration information. The configuration information is transmitted to a third network device, and the third network device transmits the second configuration information to the first network device.
  • the configuration instruction information needs to be sent to the first network device, or the first network device may have failed due to its uplink And refuses to schedule a third network device for uplink transmission.
  • the configuration instruction information may be Random Access (RACH), Scheduling Request (SR), Buffer State Report (Buffer State Report, BSR), or pre-configured UL grant), which is not specifically limited by the embodiments of the present application.
  • Step S402 The third network device sends feedback information to the first network device.
  • the IAB node 3 can detect whether the second configuration information of the IAB donor is received.
  • the second configuration information is used to indicate that the intermediate node is allowed to send the return instruction information when receiving the NACK signal. If IAB node 3 receives the second configuration information, IAB node 3 can send feedback information to IAB node 2 and IAB node 2 receives the feedback information.
  • the IAB donor transmits downlink data to the terminal device via the IAB node 2 and IAB node 3
  • the first network device is IAB node 2
  • the third network device is IAB donor
  • IAB node 2 After sending the return instruction information to the IAB donor, the IAB donor can detect whether there is second configuration information.
  • the second configuration information is used to indicate that the intermediate node is allowed to send the return instruction information when receiving the NACK signal. If the second configuration information exists, The IAB donor can send feedback information to the IAB node 2 and the IAB node 2 receives the feedback information.
  • Step S403 The first network device stops receiving data sent by the third network device.
  • the IAB donor transmits downlink data to the terminal device via the IAB node 2 and IAB node 3
  • the IAB donor sends feedback information to the IAB node 2 and the IAB node 2 can stop receiving the IAB node Downstream data.
  • Step S404 The first network device sends back data to the third network device.
  • the IAB donor transmits downlink data to the terminal device through the IAB node 2 and IAB node 3, the IAB donor sends feedback information to the IAB node 2, and the IAB node 2 can send back the IAB Data, the back data is the downlink data belonging to the IAB donor that the IAB node 2 failed to send.
  • the third network device may transmit the return data to the receiving end through another path. Specifically, the third network device may re-transmit the data according to the existing routing information on the data packet containing the return data. Configure the routing path, for example, add new routing information based on the original routing information; or delete the original routing information and replace it with new routing information.
  • the IAB node 3 can transmit the return data. The data is transmitted to the IAB donor via the IAB node1.
  • the IAB donor transmits downlink data to the terminal device via IAB node 2 and IAB node 3
  • the IAB donor can pass the returned data via IAB node 1 and IAB node 3 are transmitted to the terminal equipment.
  • the first network device may reselect the upper node according to the network topology and routing information of the existing data transmission system, and transmit the data to the receiving end through the new upper node.
  • the first network device may be an IAB node 2.
  • the terminal device sends uplink data to IAB node 3, and IAB node 3 forwards the uplink data to IAB node 2.
  • IAB node 2 fails to decode the uplink data, IAB node 2 sends a NACK signal to IAB node 3.
  • IAB node 3 can choose a higher-level node again.
  • IAB node 1 is a new higher-level node of IAB node 3.
  • IAB node 3 transmits the uplink data to IAB through IAB node 1.
  • the first network device may be the IAB node 2.
  • the IAB donor sends downlink data to the IAB node 2.
  • the IAB node 2 fails to decode the downlink data, and the IAB node 2 sends a NACK signal to the IAB donor.
  • the IAB donor can re-select lower-level nodes.
  • IAB node 1 is used as a new lower-level node of the IAB donor.
  • the IAB donor transmits the downlink data to the terminal device through IAB node 1 and IAB node 3.
  • the first network device may use a node with a higher priority as an upper node of the first network device, and the first network device may also use a neighboring node designated by the IAB donor as an upper node of the first network device. node. For example, the shorter the link distance to the IAB donor, the higher the priority of the node, the first network device may use the node with the shorter link distance to the IAB donor as the superior node of the first network device. .
  • the first network device may send a buffer status of the first network device to a new upper node of the first network device, For example, the original routing information, the cause of the link abnormality, and the cause can be indicated by a cause value.
  • the definition of the specific cause value depends on the protocol, and is not limited in this application.
  • the first network device determines whether to start the corresponding process described in FIG. 4 according to one or more of the following possible conditions: within a preset time period, the first network device determines the first network device The total amount of data of all data currently stored in the cache is greater than the preset data amount threshold; or the quality of the return link of the first network device is less than the preset quality threshold within a preset period of time; or all candidate beams are smaller than the preset beam Threshold; or beam failure; or wireless link failure.
  • the first network device sends back instruction information to the third network device
  • the third network device sends feedback information to the first network device
  • the first network device stops receiving uplink data sent by the third network device. And send back data to the third network device, which can effectively realize data retransmission.
  • FIG. 5 is a schematic structural diagram of a user plane protocol stack disclosed in an embodiment of the present application.
  • the user plane of the user plane protocol stack includes UE, IAB-node1, IAB-node2, and IAB-donor.
  • the protocol stack of the UE includes a Service Data Adaptation Protocol (SDAP) layer, a Packet Data Convergence Protocol (PDCP) layer, and a Radio Link Control (Radio Link Control). RLC) layer and MAC layer.
  • SDAP Service Data Adaptation Protocol
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • the protocol stack that IAB-node 2 communicates with the UE includes the RLC layer and the MAC layer from top to bottom, and the protocol stack that IAB-node 2 communicates with IAB-node 1 includes the RLC layer and the adaptation layer (Adaptation Layer) from top to bottom. , Adpt) and MAC layer.
  • the protocol stack that IAB-node 1 communicates with IAB-node 2 includes the RLC layer, Adapt layer, and MAC layer from top to bottom, and the protocol stack that IAB-node 1 communicates with IAB-donor includes the RLC layer and Adpt from top to bottom And MAC layer.
  • FIG. 6 is a schematic structural diagram of another user plane protocol stack disclosed in an embodiment of the present application.
  • the user plane protocol stack has a part of a layer 2 protocol stack.
  • data is between a terminal device, an L2RN, and a base station.
  • the forwarding is based on PDCP / RLC / MAC packet data unit (PDU), and the base station is, for example, the host base station (Donor NodeB, DgNB) in FIG. 5.
  • the data transmitted at the intermediate nodes can be less processed by some protocol layers, the delay is shorter, and the signaling overhead is smaller.
  • the PDCP peer entity of the terminal device is at the base station, and the peer entities such as RLC, MAC, and PHY of the terminal device are at the RN.
  • PDCP PDUs are forwarded between nodes.
  • PDCP PDUs are processed through the Adpt added between PDCP and RLC layers.
  • DgNB encapsulates the PDCP PDU into an adaptation layer PDU, and then sends it to the RLC layer.
  • the adaptation layer adds the identification of the terminal device and the identification of the first bearer.
  • the RN selects the corresponding UE DRB to process the data according to the identifier of the terminal device and the identifier of the first bearer, and then sends the data to the terminal device.
  • Adpt is used to identify the terminal device to which the data belongs and the DRB of the terminal device when forwarding data between the RN and DgNB.
  • SDAP Service Data Adaptation Protocol
  • the interface between the RN and the base station may also be F1AP, GTP tunnel, or F1 Application Protocol (AP) with extended functions.
  • F1 is the connection between the Central Unit (CU) and the Distributed Unit (DU). ) Interface, GPRS Tunneling Protocol (GPRS Tunneling Protocol, GTP) tunnel, etc.
  • General Packet Radio Service (GPRS) is a packet-based transmission.
  • Fig. 7 is another data transmission method provided by an embodiment of the present application. The method includes, but is not limited to, the following steps:
  • Step S701 The second network device sends the third configuration information to the terminal device or the fourth network device.
  • the third configuration information includes retransmission instruction information.
  • the retransmission instruction information is used to instruct the terminal device or the fourth network device to perform data retransmission.
  • the retransmission instruction information includes a PDCP layer PDU sequence number (Serial Number, SN).
  • the fourth network device includes PDCP, and can process PDCP data of its upper node or lower node.
  • the retransmission indication information may include a cause value, and / or the number K of retransmission packets.
  • the IAB donor can send third configuration information to the terminal device.
  • the second network device may send the third configuration information to the first network device, and the first network device forwards the third configuration information to the terminal device or the fourth network device.
  • the terminal device can send data to the fourth network device, the fourth network device processes the PDCP data of the terminal device, and buffers the sent data in a buffer in the PDCP layer.
  • the fourth network device does not necessarily have to be a direct superior node of the terminal device, and the direct superior node refers to the terminal device directly sending data to the fourth network device without being forwarded by other network devices.
  • Step S702 The terminal device or the fourth network device performs data retransmission of the PDCP PDU according to the retransmission instruction information.
  • the terminal device or the fourth network device may retransmit all data after the SN according to the SN.
  • the data after all the SNs include the data packets of all PDCP PDU packet data that are assigned PDCP packet sequence numbers after the SN.
  • the terminal device or the fourth network device retransmits the K data packets after the PDCP PDU sequence number is SN.
  • the PDCP layer discards the data packets in the cache only in the following two cases: the PDCP status report received by the receiving end is received, and the PDCP packets that have been successfully sent back are deleted in the report; or the timeout timer ( discardTimer) expires. That is, in the scenario of hop-by-hop feedback, if the SDU of the PDCP has not been discarded, the PDCP can be used for retransmission.
  • the second network device sends the third configuration information to the terminal device or the fourth network device, and the terminal device performs data retransmission of PDCP and PDU according to the retransmission instruction information, which can effectively implement data retransmission, and Improve the utilization of air interface resources.
  • FIG. 8 is another data transmission method provided by an embodiment of the present application.
  • the method includes, but is not limited to, the following steps:
  • Step S801 The third network device receives the fourth configuration information of the second network device.
  • the third network device may receive the fourth configuration information of the second network device.
  • the fourth configuration information includes second indication information, and the second indication information is used to instruct to configure a cache of data about the terminal device or the first bearer.
  • the third network device may be the IAB node 3
  • the second network device may be the IAB node.
  • the IAB donator may send the fourth configuration information to the IAB node 3, which is used to instruct the IAB node 3 to establish a cache for storing data about the terminal device or the first bearer data.
  • the third network device may be IAB node 2 and the second network device may be IAB donor.
  • the IAB donor may send the fourth configuration information to the IAB node 2 to instruct the IAB node 2 to establish a cache for storing data about the terminal device or the first bearer data.
  • Step S802 The third network device sends data to the first network device.
  • the IAB node 3 can send the uplink data to the IAB node. 2.
  • IAB node 2 can send the downstream data To IAB node 3.
  • Step S803 The first network device sends data to the receiving end.
  • a terminal device transmits uplink data to the IAB through the IAB node 3 and IAB node 2
  • the IAB node 2 can upload the uplink data Data is forwarded to the IAB donor.
  • IAB node 3 Take the data transmission system shown in Figure 3 as an example. If the IAB donor transmits downlink data to the terminal device via IAB node 2 and IAB node 3, after IAB node 2 sends the downlink data to IAB node 3, IAB node 3 can send the downlink data Data is forwarded to the terminal device.
  • Step S804 When the receiving end successfully decodes the data, it sends an ACK signal to the first network device.
  • the IAB node 2 forwards the uplink data to the IAB donor. If the decoding is successful, the IAB donor sends an ACK signal to the IAB node 2.
  • an IAB donor transmits downlink data to a terminal device via IAB node 2 and IAB node 3
  • the IAB node 3 forwards the downstream data to the terminal device
  • the terminal device transmits the downstream data to the terminal device
  • the decoding is successful, and the terminal device sends an ACK signal to the IAB node.
  • Step S805 The first network device forwards the ACK signal to the third network device.
  • the first network device may further receive fifth configuration information of the second network device, where the fifth configuration information includes third indication information, and the third indication information is used to indicate when the ACK signal of the receiving end is received. To forward the ACK signal to a third network device.
  • a terminal device transmits uplink data to the IAB through the IAB node 3 and IAB node 2
  • the IAB node sends an ACK signal to the IAB node 2
  • the IAB node 2 forwards the ACK signal to IAB node 3.
  • IAB donor transmits downlink data to the terminal device via IAB node 2 and IAB node 3, and after the terminal device sends an ACK signal to IAB node 3, IAB node 3 forwards the ACK signal to IAB node 2.
  • Step S806 The third network device deletes the data stored in the cache of the third network device.
  • the third network device may determine that the receiving end successfully decodes the data, and then delete the data stored in the buffer of the third network device.
  • the IAB node 2 forwards the ACK signal to the IAB node 3. After the IAB node 3 can determine the IAB The donor successfully decodes the uplink data, and then deletes the uplink data stored in the cache of the IAB node 3.
  • IAB node 2 can determine the terminal The device successfully decodes the uplink data, and then deletes the uplink data stored in the cache of the IAB node 2.
  • the third network device receives the fourth configuration information of the second network device, and after determining that the receiving end successfully decodes the data, deletes the data stored in the cache of the third network device, which can effectively implement the data Retransmission.
  • FIG. 9 is a schematic structural diagram of a first network device according to an embodiment of the present application, which is used to implement the functions of the first network device in the embodiment of FIG. 2.
  • the function blocks of the first network device may be hardware or software. Or a combination of hardware and software to implement the solution of this application.
  • the functional blocks described in FIG. 9 may be combined or separated into several sub-blocks to implement the solution of the present application. Therefore, the content described above in this application may support any possible combination or separation or further definition of the functional modules described below.
  • the first network device may include: a receiving module 901 and a processing module 902, where a detailed description of each module is as follows.
  • the receiving module 901 is configured to receive first configuration information of a second network device, where the first configuration information includes at least one of the following information: ARQ feedback information of a first bearer, and a node identifier of the first network device, The identifier of the first bearer, the identifier of the terminal device, the logical channel identifier, and the ARQ target node identifier;
  • the processing module 902 is configured to determine whether to perform ARQ feedback according to the first configuration information.
  • the ARQ feedback information of the first bearer includes: one of end-to-end feedback, hop-by-hop feedback, and feedback indication; and the feedback indication is used to instruct the first network device pair ARQ feedback is performed on the data of the first bearer or ARQ feedback is not performed on the data of the first bearer.
  • the ARQ feedback information of the first configuration information corresponds to one or more of the first bearers of the terminal device, or corresponds to all bearers of the terminal device.
  • the first configuration information may further include a transmission direction indication, and the transmission direction indication includes uplink transmission or downlink transmission.
  • the processing module 902 determines whether to perform ARQ feedback according to the first configuration information, and is specifically configured to:
  • the ARQ feedback information includes end-to-end feedback, if the identifier of the first network device and the identifier of the ARQ target node are the same, the first network device sends ARQ feedback, and if the identifier of the first network device and The ARQ target node identifiers are different, the first network device does not perform ARQ feedback, and forwards the data of the first bearer;
  • ARQ feedback information includes hop-by-hop feedback, when the first network device receives data of the first bearer, send ARQ feedback;
  • the first network device determines whether to perform ARQ feedback on the first bearer data according to the feedback indication.
  • each module may also correspond to the corresponding description of the embodiment shown in FIG. 2.
  • each functional module in the embodiment of the present application may be integrated into one processing module, or each module may exist separately physically, or two or more modules may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or software functional modules.
  • Another first network device provided in the embodiment of the present application is used to implement the functions of the first network device in the embodiment of FIG. 4.
  • the function blocks of the first network device may be implemented by hardware, software, or a combination of hardware and software. Program.
  • the functional blocks described in the embodiments of the present application may be combined or separated into several sub-blocks to implement the solution of the present application. Therefore, the content described above in this application may support any possible combination or separation or further definition of the functional modules described below.
  • the first network device may include: a sending module 903, where a detailed description of each module is as follows.
  • the sending module 903 is configured to send back indication information to a third network device, where the back indication information is used to notify the third network device to receive back data, where the back data is sent by the first network device Failed data belonging to a third network device;
  • the sending module 903 is further configured to send the backhaul data to the third network device;
  • the first network device is an upper node of the third network device.
  • the first network device further includes:
  • the receiving module 901 is configured to receive the feedback information sent by the third network device after the sending module 903 sends the return instruction information.
  • the first network device further includes:
  • the processing module 902 is configured to stop receiving the uplink data sent by the third network device after the receiving module 901 receives the feedback information.
  • each module may also correspond to the corresponding description of the embodiment shown in FIG. 4.
  • each functional module in the embodiment of the present application may be integrated into one processing module, or each module may exist separately physically, or two or more modules may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or software functional modules.
  • the first network device may include: at least one processor 1001, a bus 1002, a receiver 1003, a transmitter 1004, and a memory 1005.
  • the receiver 1003, the transmitter 1004, the memory 1005, and the processor 1001 are connected to each other through a bus 1002;
  • the bus 1002 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture , EISA) bus and so on.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the processor 1001 may be a central processing unit (CPU), a network processor (NP), a general purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (Application- Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.
  • CPU central processing unit
  • NP network processor
  • DSP digital signal processor
  • ASIC Application- Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the memory 1005 may store the program code and the first configuration information, where:
  • the receiver 1003 receives the first configuration information of the second network device, where the first configuration information includes at least one of the following information: automatic retransmission request ARQ feedback information of the first bearer, and a node identifier of the first network device The identifier of the first bearer, the identifier of the terminal device, the logical channel identifier, and the ARQ target node identifier;
  • the processor 1001 determines whether to perform ARQ feedback according to the first configuration information.
  • the ARQ feedback information of the first bearer includes: one of end-to-end feedback, hop-by-hop feedback, and feedback indication; and the feedback indication is used to instruct the first network device pair ARQ feedback is performed on the data of the first bearer or ARQ feedback is not performed on the data of the first bearer.
  • the ARQ feedback information of the first configuration information corresponds to one or more of the first bearers of the terminal device, or corresponds to all bearers of the terminal device.
  • the first configuration information may further include a transmission direction indication, and the transmission direction indication includes uplink transmission or downlink transmission.
  • the processor 1001 determines whether to perform ARQ feedback according to the first configuration information, which may specifically be:
  • the transmitter 1004 sends ARQ feedback, and if the identifier of the first network device and the ARQ The target node identifier is different, the transmitter 1004 does not perform ARQ feedback, and the receiver 1003 forwards the data of the first bearer;
  • ARQ feedback information includes hop-by-hop feedback
  • the transmitter 1004 sends ARQ feedback
  • the processor 1001 determines whether to perform ARQ feedback on the first bearer data according to the feedback instruction.
  • the first network device is only an example provided in the embodiment of the present application, and the first network device may have more or less components than those shown, two or more components may be combined, or Different configuration implementations of components are possible.
  • the first network device described in the embodiment of the present application may be used to implement part or all of the processes in the method embodiment described in conjunction with FIG. 2 of the present application.
  • the memory 1005 may store program code, return instruction information, and return data, where:
  • the transmitter 1004 sends backhaul indication information to the third network device, where the backhaul indication information is used to notify the third network device to receive backhaul data, and the backhaul data belongs to the first network device that failed to send Data of a third network device;
  • the transmitter 1004 sends the backhauled data to the third network device
  • the first network device is an upper node of the third network device.
  • the receiver 1003 receives the feedback information sent by the third network device.
  • the processor 1001 stops receiving uplink data sent by the third network device.
  • the first network device is only an example provided in the embodiment of the present application, and the first network device may have more or less components than those shown, two or more components may be combined, or Different configuration implementations of components are possible.
  • the first network device introduced in the embodiment of the present application may be used to implement part or all of the processes in the method embodiment described in conjunction with FIG. 4 in the present application.
  • FIG. 11 is a schematic structural diagram of a second network device according to an embodiment of the present application, which is used to implement the function of the second network device in the embodiment of FIG. Or a combination of hardware and software to implement the solution of this application.
  • the functional blocks described in FIG. 11 may be combined or separated into several sub-blocks to implement the solution of the present application. Therefore, the content described above in this application may support any possible combination or separation or further definition of the functional modules described below.
  • the second network device may include: a processing module 1101 and a sending module 1102.
  • a processing module 1101 may include: a processing module 1101 and a sending module 1102.
  • a detailed description of each module is as follows.
  • the processing module 1101 is configured to determine first configuration information, where the first configuration information includes at least one of the following information: an automatic retransmission request ARQ feedback mode of a first bearer, a node identifier of the first network device, and The identifier of the first bearer, the identifier of the terminal device, the logical channel identifier, and the ARQ target node identifier;
  • the sending module 1102 is configured to send first configuration information to a first network device.
  • the ARQ feedback information of the first bearer includes: one of end-to-end feedback, hop-by-hop feedback, and feedback indication; and the feedback indication is used to instruct the first network device pair ARQ feedback is performed on the data of the first bearer or ARQ feedback is not performed on the data of the first bearer.
  • the first configuration information may further include a transmission direction indication, and the transmission direction indication includes uplink transmission or downlink transmission.
  • each module may also correspond to the corresponding description of the embodiment shown in FIG. 2.
  • each functional module in the embodiment of the present application may be integrated into one processing module, or each module may exist separately physically, or two or more modules may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or software functional modules.
  • FIG. 12 is a schematic structural diagram of a second network device disclosed in an embodiment of the present application.
  • the second network device may include: at least one processor 1201, a bus 1202, a receiver 1203, a transmitter 1204, and a memory 1205.
  • the receiver 1203, the transmitter 1204, the memory 1205, and the processor 1201 are connected to each other through a bus 1202; the bus 1202 may be a PCI bus or an EISA bus.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 12, but it does not mean that there is only one bus or one type of bus.
  • the processor 1201 may be a CPU, an NP, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.
  • the processor 1201 is a CPU
  • the CPU may be a single-core CPU or a multi-core CPU.
  • the receiver 1203 and the transmitter 1204 may be integrated as a transceiver.
  • the memory 1205 may store the program code and the first configuration information, where:
  • the processor 1201 is configured to determine first configuration information, where the first configuration information includes at least one of the following information: automatic retransmission request ARQ feedback information of the first bearer, a node identifier of the first network device, and The identifier of the first bearer, the identifier of the terminal device, the logical channel identifier, and the ARQ target node identifier;
  • the transmitter 1204 is configured to send the first configuration information to the first network device.
  • the ARQ feedback information of the first bearer includes: one of end-to-end feedback, hop-by-hop feedback, and feedback indication; and the feedback indication is used to instruct the first network device pair ARQ feedback is performed on the data of the first bearer or ARQ feedback is not performed on the data of the first bearer.
  • the first configuration information may further include a transmission direction indication, and the transmission direction indication includes uplink transmission or downlink transmission.
  • the second network device is only an example provided by the embodiment of the present application, and the second network device may have more or less components than those shown, two or more components may be combined, or Different configuration implementations of components are possible.
  • the second network device described in the embodiment of the present application may be used to implement part or all of the processes in the method embodiment described in conjunction with FIG. 2 of the present application.
  • FIG. 13 is a schematic structural diagram of a terminal device or a fourth network device according to an embodiment of the present application, which is used to implement the functions of the terminal device or the fourth network device in the embodiment of FIG. 7.
  • the functional blocks of the network device may be implemented by hardware, software, or a combination of hardware and software.
  • the functional blocks described in FIG. 13 may be combined or separated into several sub-blocks to implement the solution of the present application. Therefore, the content described above in this application may support any possible combination or separation or further definition of the functional modules described below.
  • the terminal device or the fourth network device may include: a receiving module 1301 and a processing module 1302, where a detailed description of each module is as follows.
  • a receiving module 1301 is configured to receive third configuration information from a second network device, where the third configuration information includes retransmission instruction information, and the retransmission instruction information is used to instruct the terminal device or the fourth network device to perform data transmission.
  • Retransmission where the retransmission indication information includes an SN of a packet data unit PDU of a PDCP layer of the packet data convergence protocol;
  • the processing module 1302 is configured to perform data retransmission of PDCP PDU according to the retransmission instruction information.
  • the retransmission indication information includes a cause value, and / or the number K of retransmission packets.
  • processing module 1302 is specifically configured to:
  • the data after all the SNs include packet data of all PDCP PDU packet data that are assigned a PDCP packet sequence number after the SN.
  • processing module 1302 is specifically configured to:
  • each module may also correspond to the corresponding description of the embodiment shown in FIG. 7.
  • each functional module in the embodiment of the present application may be integrated into one processing module, or each module may exist separately physically, or two or more modules may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or software functional modules.
  • FIG. 14 is a schematic structural diagram of a terminal device or a fourth network device disclosed in an embodiment of the present application.
  • the terminal device or the fourth network device may include at least one processor 1401, a bus 1402, a receiver 1403, a transmitter 1404, and a memory 1405.
  • the receiver 1403, the transmitter 1404, the memory 1405, and the processor 1401 are connected to each other through a bus 1402.
  • the bus 1402 may be a PCI bus or an EISA bus.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used in FIG. 14, but it does not mean that there is only one bus or one type of bus.
  • the processor 1401 may be a CPU, an NP, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.
  • the processor 1401 is a CPU
  • the CPU may be a single-core CPU or a multi-core CPU.
  • the receiver 1403 and the transmitter 1404 may be integrated as a transceiver.
  • the memory 1405 may store the program code and the third configuration information, where:
  • the receiver 1403 receives third configuration information from the second network device, where the third configuration information includes retransmission instruction information, where the retransmission instruction information is used to instruct the terminal device or the fourth network device to perform data retransmission,
  • the retransmission instruction information includes an SN of a packet data unit PDU of a PDCP layer of the packet data convergence protocol;
  • the processor 1401 performs data retransmission of PDCP and PDU according to the retransmission instruction information.
  • the retransmission indication information includes a cause value, and / or the number K of retransmission packets.
  • the processor 1401 retransmits data after all SNs according to the SN;
  • the data after all the SNs include packet data of all PDCP PDU packet data that are assigned a PDCP packet sequence number after the SN.
  • the processor 1401 retransmits the K data packets after the PDCP PDU sequence number is SN.
  • terminal device or the fourth network device is only an example provided in the embodiment of the present application, and the terminal device or the fourth network device may have more or fewer components than those shown, and two or More components, or may have different configuration implementations of components.
  • the second network device described in the embodiment of the present application may be used to implement part or all of the processes in the method embodiment described in conjunction with FIG. 7 in the present application.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, a computer, a server, or a data center.
  • 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, a data center, or the like that includes one or more available medium integration.
  • the available medium may be a magnetic medium (for example, a floppy disk, a storage disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state storage disk (Solid State Disk (SSD)), and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission de données, un dispositif de réseau, et un dispositif terminal. Le procédé comprend les étapes suivantes : un premier dispositif de réseau reçoit des premières informations de configuration d'un second dispositif de réseau, les premières informations de configuration comprenant au moins l'un des éléments d'informations suivants : un mode de rétroaction ARQ d'un premier support, un identifiant de noeud du premier dispositif de réseau, un identifiant du premier support, un identifiant d'un dispositif terminal, un identifiant de canal logique et un identifiant de noeud cible ARQ ; et le premier dispositif de réseau détermine s'il faut effectuer une rétroaction ARQ selon les premières informations de configuration. Des données peuvent ainsi être transmises efficacement dans des mécanismes ARQ différents.
PCT/CN2019/092338 2018-06-21 2019-06-21 Procédé de transmission de données, dispositif de réseau, et dispositif terminal Ceased WO2019242755A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810649847.0A CN110636549B (zh) 2018-06-21 2018-06-21 数据传输方法、网络设备以及终端设备
CN201810649847.0 2018-06-21

Publications (1)

Publication Number Publication Date
WO2019242755A1 true WO2019242755A1 (fr) 2019-12-26

Family

ID=68967297

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/092338 Ceased WO2019242755A1 (fr) 2018-06-21 2019-06-21 Procédé de transmission de données, dispositif de réseau, et dispositif terminal

Country Status (2)

Country Link
CN (1) CN110636549B (fr)
WO (1) WO2019242755A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021134663A1 (fr) * 2019-12-31 2021-07-08 华为技术有限公司 Procédé et appareil d'accès au réseau, système de réseau et procédé de communication, et support de stockage
CN113301603A (zh) * 2020-02-21 2021-08-24 维沃移动通信有限公司 数据传输方法、设备及介质
WO2021168833A1 (fr) * 2020-02-28 2021-09-02 Oppo广东移动通信有限公司 Procédé et appareil de transmission de données, et dispositif
CN114365540A (zh) * 2019-12-31 2022-04-15 华为技术有限公司 通信方法、设备及系统
CN114731285A (zh) * 2020-01-19 2022-07-08 Oppo广东移动通信有限公司 Pdcp重排序定时器配置方法、装置、终端设备和网络设备
CN114845335A (zh) * 2021-01-15 2022-08-02 大唐移动通信设备有限公司 数据传输方法及装置、接入网设备
CN115836508A (zh) * 2021-07-16 2023-03-21 北京小米移动软件有限公司 一种数据传输方法、数据传输装置及存储介质
CN116584150A (zh) * 2020-10-22 2023-08-11 华为技术有限公司 一种中继通信方法及装置
EP4145741A4 (fr) * 2020-04-30 2024-01-24 Beijing Xiaomi Mobile Software Co., Ltd. Procédé et dispositif de traitement de transmission de données, appareil de communication et support de stockage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4064754B1 (fr) * 2020-01-16 2023-10-11 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé de transmission de données et dispositif associé
US20240356677A1 (en) * 2021-07-27 2024-10-24 Nec Corporation Method, device and computer storage medium of communication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103580778A (zh) * 2012-07-20 2014-02-12 华为技术有限公司 一种数据传输方法、装置及通信系统
WO2014166053A1 (fr) * 2013-04-09 2014-10-16 华为技术有限公司 Procede et terminal de communication
CN105850068A (zh) * 2014-11-05 2016-08-10 华为技术有限公司 一种数据包传输装置及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100976733B1 (ko) * 2006-11-17 2010-08-18 삼성전자주식회사 멀티 홉 릴레이 시스템에서 효율적인 자동 재전송 요구 장치 및 방법
US8402334B2 (en) * 2008-12-17 2013-03-19 Research In Motion Limited System and method for hybrid automatic repeat request (HARQ) functionality in a relay node
WO2010096947A1 (fr) * 2009-02-24 2010-09-02 上海贝尔股份有限公司 Procédé, station de base et station relais pour réaliser un processus arq dans un système à relais
EP2469750A4 (fr) * 2009-08-17 2014-07-02 Alcatel Lucent Procédé et dispositif de commande de transmission de données de liaison descendante dans un système de communication à relais à plusieurs bonds
CN102868507B (zh) * 2012-09-19 2015-10-28 电子科技大学 基于传输可靠率的分段arq方法
US10630410B2 (en) * 2016-05-13 2020-04-21 Telefonaktiebolaget Lm Ericsson (Publ) Network architecture, methods, and devices for a wireless communications network

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103580778A (zh) * 2012-07-20 2014-02-12 华为技术有限公司 一种数据传输方法、装置及通信系统
WO2014166053A1 (fr) * 2013-04-09 2014-10-16 华为技术有限公司 Procede et terminal de communication
CN105850068A (zh) * 2014-11-05 2016-08-10 华为技术有限公司 一种数据包传输装置及方法

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021134663A1 (fr) * 2019-12-31 2021-07-08 华为技术有限公司 Procédé et appareil d'accès au réseau, système de réseau et procédé de communication, et support de stockage
CN114365540A (zh) * 2019-12-31 2022-04-15 华为技术有限公司 通信方法、设备及系统
CN114365540B (zh) * 2019-12-31 2023-11-17 华为技术有限公司 通信方法、设备及系统
CN114731285A (zh) * 2020-01-19 2022-07-08 Oppo广东移动通信有限公司 Pdcp重排序定时器配置方法、装置、终端设备和网络设备
CN114731285B (zh) * 2020-01-19 2023-07-14 Oppo广东移动通信有限公司 Pdcp重排序定时器配置方法、装置、终端设备和网络设备
CN113301603A (zh) * 2020-02-21 2021-08-24 维沃移动通信有限公司 数据传输方法、设备及介质
CN113301603B (zh) * 2020-02-21 2023-07-25 维沃移动通信有限公司 数据传输方法、设备及介质
WO2021168833A1 (fr) * 2020-02-28 2021-09-02 Oppo广东移动通信有限公司 Procédé et appareil de transmission de données, et dispositif
EP4145741A4 (fr) * 2020-04-30 2024-01-24 Beijing Xiaomi Mobile Software Co., Ltd. Procédé et dispositif de traitement de transmission de données, appareil de communication et support de stockage
CN116584150A (zh) * 2020-10-22 2023-08-11 华为技术有限公司 一种中继通信方法及装置
CN114845335A (zh) * 2021-01-15 2022-08-02 大唐移动通信设备有限公司 数据传输方法及装置、接入网设备
CN115836508A (zh) * 2021-07-16 2023-03-21 北京小米移动软件有限公司 一种数据传输方法、数据传输装置及存储介质
US12587482B2 (en) 2021-07-16 2026-03-24 Beijing Xiaomi Mobile Software Co., Ltd. Data transmission method, data transmission device, and storage medium

Also Published As

Publication number Publication date
CN110636549B (zh) 2022-04-12
CN110636549A (zh) 2019-12-31

Similar Documents

Publication Publication Date Title
CN110636549B (zh) 数据传输方法、网络设备以及终端设备
JP7433455B2 (ja) リンク切替、リンク切替構成方法、装置、通信ノード及び媒体
CN111901817B (zh) 数据包传输方法、装置、通信节点及存储介质
US11483058B2 (en) Communication method, communications node, and system
US10939357B2 (en) Integrated access and backhaul adaptation layer status report
CN111148163B (zh) 通信方法及装置
CN111565408B (zh) 触发无线链路失败的方法及设备
US10419969B2 (en) Interface functionality for RAN-WLAN radio aggregation
CN107733577B (zh) 进行重传处理的方法和装置
KR20170053326A (ko) 통신 시스템에서 데이터 송수신 방법 및 장치
WO2020063504A1 (fr) Procédé et dispositif de transmission de données pour réseau de liaison terrestre sans fil
US10574399B2 (en) Acknowledgement of a range of sequence numbers
JP2023546399A (ja) ルーティング選択方法、装置及びシステム
US8711756B2 (en) Efficient relay automatic repeat request procedure in broadband wireless access system
CN101340267B (zh) 通讯系统的传输控制方法与装置
CN115701173A (zh) 数据重传方法、设备、装置及存储介质
US20230188300A1 (en) Communication control method
EP2073424A1 (fr) Procédé et dispositif de récupération d'erreur pour une communication à sauts multiples sans fil
CN116097740A (zh) 在层2中继中的移动性期间的数据传送
CN108702243B (zh) Mmw网络中的中继arq的增强
CN101667902B (zh) 数据发送和反馈的方法
US20240267780A1 (en) Communication control method and relay node
JP2019033521A (ja) ある範囲のシーケンスナンバーの確認

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19821711

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19821711

Country of ref document: EP

Kind code of ref document: A1