CN110636549B - Data transmission method, network equipment and terminal equipment - Google Patents

Data transmission method, network equipment and terminal equipment Download PDF

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CN110636549B
CN110636549B CN201810649847.0A CN201810649847A CN110636549B CN 110636549 B CN110636549 B CN 110636549B CN 201810649847 A CN201810649847 A CN 201810649847A CN 110636549 B CN110636549 B CN 110636549B
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network device
feedback
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bearer
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CN110636549A (en
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袁世通
朱元萍
李铕
戴明增
刘菁
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Huawei Technologies Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/1607Details of the supervisory signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/1607Details of the supervisory signal
    • H04L1/1621Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/04Error control

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Abstract

本申请实施例公开了数据传输方法、网络设备以及终端设备,所述方法包括:第一网络设备接收第二网络设备的第一配置信息,第一配置信息包括以下信息中的至少一种:第一承载的ARQ反馈方式,第一网络设备的节点标识,第一承载的标识,终端设备的标识,逻辑信道标识,ARQ目标节点标识;第一网络设备根据第一配置信息确定是否进行ARQ反馈。可在不同的ARQ机制下有效进行数据传输。

Figure 201810649847

The embodiments of the present application disclose a data transmission method, a network device, and a terminal device. The method includes: 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: A bearer ARQ feedback mode, the 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 first network device determines whether to perform ARQ feedback according to the first configuration information. Data transmission can be performed efficiently under different ARQ mechanisms.

Figure 201810649847

Description

数据传输方法、网络设备以及终端设备Data transmission method, network device and terminal device

技术领域technical field

本申请涉及通信技术领域,尤其涉及数据传输方法、网络设备以及终端设备。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.

背景技术Background technique

长期演进(long term evolution,LTE)中继(relay)技术是通过在网络中部署中继节点(relay node,RN)来转发基站(evolved universal terrestrial radio accessnetwork node B,eNB)和用户设备(user equipment,UE)之间数据的技术,可以增强网络容量,解决基站之间的回传连接,以及解决覆盖盲区。The long term evolution (LTE) relay (relay) technology is to forward the base station (evolved universal terrestrial radio access network node B, eNB) and user equipment (user equipment) by deploying a relay node (relay node, RN) in the network , UE) data technology, which can enhance network capacity, solve backhaul connections between base stations, and solve coverage blind spots.

面向5G(5th generation mobile networks or 5th generation wirelesssystems,5G)的无线中继组网场景中,将支持多跳无线中继和多连接场景。多跳无线中继的组网场景下,参与用户设备与基站之间数据转发的中继节点数量有一个或多个,该中继节点数量即为跳数。In the wireless relay networking scenario for 5G (5th generation mobile networks or 5th generation wireless systems, 5G), multi-hop wireless relay and multi-connection scenarios will be supported. In the networking scenario of multi-hop wireless relay, there are one or more relay nodes participating in data forwarding between the user equipment and the base station, and the number of relay nodes is the hop count.

在多跳无线中继组网场景下,中继节点可以采用逐跳的无线链路控制(radiolink control,RLC)管理,即每个中继节点可以直接采用5G/NR(new radio,NR)的方式来处理发往下一跳或上一跳的数据,也可以采用端到端的RLC管理。为了保证数据传输的可靠性,在RLC层支持自动重传请求(Automatic Repeat Request,ARQ)的功能。In the multi-hop wireless relay networking scenario, the relay node can use hop-by-hop radio link control (RLC) management, that is, each relay node can directly use 5G/NR (new radio, NR) In this way, the data sent to the next hop or the previous hop can be processed, and end-to-end RLC management can also be used. In order to ensure the reliability of data transmission, the RLC layer supports the function of automatic repeat request (Automatic Repeat Request, ARQ).

在5G中,ARQ的机制可以是逐跳的ARQ,也可以是端到端的ARQ,不同的ARQ的机制对数据的操作方式不同,在不同的ARQ机制下如何保证有效的数据传输是一个需要解决的问题。In 5G, the ARQ mechanism can be hop-by-hop ARQ or end-to-end ARQ. Different ARQ mechanisms operate on data in different ways. How to ensure effective data transmission under different ARQ mechanisms is a problem that needs to be solved. The problem.

发明内容SUMMARY OF THE INVENTION

本申请实施例所要解决的技术问题在于,提供数据传输方法、网络设备以及终端设备,可在不同的ARQ机制下有效进行数据传输。The technical problem to be solved by 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.

第一方面,本申请实施例提供了一种数据传输方法,第一网络设备接收第二网络设备的第一配置信息,所述第一配置信息包括以下信息中的至少一种:第一承载的ARQ反馈信息,所述第一网络设备的节点标识,所述第一承载的标识,终端设备的标识,逻辑信道标识,ARQ目标节点标识;所述第一网络设备根据所述第一配置信息确定是否进行ARQ反馈。In a first aspect, 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, the 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 first network device determines according to the first configuration information Whether to perform ARQ feedback.

在该实现方式中,第一网络设备基于第二网络设备的第一配置信息确定是否进行ARQ反馈,可在不同的ARQ机制下有效进行数据传输。In this implementation manner, 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.

在一种可能的实现方式中,第一承载的ARQ反馈信息包括:端到端反馈、逐跳反馈和反馈指示中的一种;反馈指示用于指示第一网络设备对第一承载的数据进行ARQ反馈或者对第一承载的数据不进行ARQ反馈。In a possible implementation manner, 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 an ARQ feedback or no ARQ feedback is performed on the data of the first bearer.

在一种可能的实现方式中,第一配置信息的ARQ反馈信息对应终端设备的一个或多个第一承载,或者对应终端设备的所有承载。In a possible implementation manner, 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.

在一种可能的实现方式中,第一配置信息还可以包括传输方向指示,传输方向指示包括上行传输或者下行传输。In a possible implementation manner, the first configuration information may further include a transmission direction indication, and the transmission direction indication includes uplink transmission or downlink transmission.

在一种可能的实现方式中,所述第一网络设备根据所述第一配置信息确定是否进行ARQ反馈包括:In a possible implementation manner, the determining by the first network device whether to perform ARQ feedback according to the first configuration information includes:

如果ARQ反馈信息包括端到端反馈,如果第一网络设备的标识和所述ARQ目标节点标识相同,第一网络设备发送ARQ反馈,如果第一网络设备的标识和ARQ目标节点标识不同,第一网络设备不进行ARQ反馈,并转发第一承载的数据;If the ARQ feedback information includes end-to-end feedback, if the identifier of the first network device is the same as the identifier of the ARQ target node, the first network device sends ARQ feedback, and if the identifier of the first network device and the identifier of the ARQ target node are different, the first network device The network device does not perform ARQ feedback, and forwards the data of the first bearer;

如果ARQ反馈信息包括逐跳反馈,第一网络设备接收到第一承载的数据时,发送ARQ反馈;If the ARQ feedback information includes hop-by-hop feedback, the first network device sends ARQ feedback when receiving the data carried by the first bearer;

如果ARQ反馈信息包括反馈指示,第一网络设备根据反馈指示确定是否对第一承载的数据进行ARQ反馈。If the ARQ feedback information includes a feedback indication, the first network device determines whether to perform ARQ feedback on the first bearer data according to the feedback indication.

第二方面,本申请实施例提供了一种数据传输方法,第二网络设备确定第一配置信息,第二网络设备向第一网络设备发送第一配置信息,所述第一配置信息包括以下信息中的至少一种:第一承载的ARQ反馈信息,所述第一网络设备的节点标识,所述第一承载的标识,终端设备的标识,逻辑信道标识,ARQ目标节点标识。In a second aspect, 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, where the first configuration information includes the following information At least one of: ARQ feedback information of the first bearer, the 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.

在该实现方式中,第二网络设备向第一网络设备发送第一配置信息,第一网络设备基于第一配置信息确定是否进行ARQ反馈,可在不同的ARQ机制下有效进行数据传输。In this implementation manner, 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, which can effectively perform data transmission under different ARQ mechanisms.

在一种可能的实现方式中,第一承载的ARQ反馈信息包括:端到端反馈、逐跳反馈和反馈指示中的一种;反馈指示用于指示第一网络设备对第一承载的数据进行ARQ反馈或者对第一承载的数据不进行ARQ反馈。In a possible implementation manner, 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 an ARQ feedback or no ARQ feedback is performed on the data of the first bearer.

在一种可能的实现方式中,第一配置信息还可以包括传输方向指示,传输方向指示包括上行传输或者下行传输。In a possible implementation manner, the first configuration information may further include a transmission direction indication, and the transmission direction indication includes uplink transmission or downlink transmission.

第三方面,本申请实施例提供了一种数据传输方法,第一网络设备向第三网络设备发送回传指示信息,所述回传指示信息用于通知所述第三网络设备接收回传数据,所述回传数据为所述第一网络设备发送失败的属于第三网络设备的数据;所述第一网络设备向所述第三网络设备发送所述回传数据;所述第一网络设备为所述第三网络设备的上级节点。In a third aspect, an embodiment of the present application provides a data transmission method, in which a first network device sends return indication information to a third network device, where the return indication information is used to notify the third network device to receive return data , the return data is data belonging to a third network device that the first network device fails to send; the first network device sends the return data to the third network device; the first network device sends the return data to the third network device; is the upper-level node of the third network device.

在该实现方式中,第三网络设备将数据经由第一网络设备转发至第一网络设备的上级节点,第一网络设备的上级节点对该数据解码失败,第一网络设备可以向第三网络设备发送回传指示信息,并向第三网络设备发送该数据,以便第三网络设备将该数据通过其他路径传输至接收端,可以实现跨多跳的数据重传恢复。In this implementation manner, the third network device forwards the data to the upper-level node of the first network device via the first network device, and the upper-level node of the first network device fails to decode the data, the first network device can send the data to the third network device. Sending back the indication information, and sending the data to the third network device, so that the third network device transmits the data to the receiving end through other paths, so that data retransmission and recovery across multiple hops can be implemented.

在一种可能的实现方式中,所述第一网络设备发送所述回传指示信息后,接收所述第三网络设备发送的反馈信息。In a possible implementation manner, after the first network device sends the backhaul indication information, it receives feedback information sent by the third network device.

在一种可能的实现方式中,所述第一网络设备接收到所述反馈信息后,停止接收所述第三网络设备发送的上行数据。In a possible implementation manner, after receiving the feedback information, the first network device stops receiving uplink data sent by the third network device.

第四方面,本申请实施例提供了一种数据传输方法,终端设备接收来自第二网络设备的第三配置信息,所述第三配置信息包括重传指示信息,所述重传指示信息用于指示所述终端设备进行数据重传,所述重传指示信息包括分组数据汇聚协议PDCP层的分组数据单元PDU的序列号SN;所述终端设备根据所述重传指示信息进行PDCP PDU的数据重传。In a fourth aspect, an embodiment of the present application provides a data transmission method, wherein a terminal device receives third configuration information from a second network device, where the third configuration information includes retransmission indication information, and the retransmission indication information is used for Instruct the terminal device to perform data retransmission, and the retransmission indication information includes the sequence number SN of the packet data unit PDU of the PDCP layer of the Packet Data Convergence Protocol; the terminal device performs data retransmission of the PDCP PDU according to the retransmission indication information pass.

在该实现方式中,第二网络设备向终端设备发送第三配置信息,终端设备根据重传指示信息进行PDCP PDU的数据重传,可有效实现数据重传,并提升空口资源的利用率。In this implementation, the second network device sends the third configuration information to the terminal device, and the terminal device retransmits PDCP PDU data according to the retransmission indication information, which can effectively implement data retransmission and improve the utilization rate of air interface resources.

在一种可能的实现方式中,重传指示信息包括原因值,和/或重传分组个数K。In a possible implementation manner, the retransmission indication information includes a cause value and/or the number K of retransmission packets.

在一种可能的实现方式中,所述终端设备根据所述重传指示信息进行PDCP PDU的数据重传包括:In a possible implementation manner, the data retransmission of the PDCP PDU by the terminal device according to the retransmission indication information includes:

所述终端设备根据所述SN重传所有SN之后的数据;The terminal device retransmits all data after the SN according to the SN;

所述所有SN之后的数据包括所有PDCP PDU的分组数据在所述SN之后被分配PDCP分组序列号的数据包。The data after all the SNs includes the packet data of all PDCP PDUs to which PDCP packet sequence numbers are assigned after the SN.

在一种可能的实现方式中,所述终端设备根据所述重传指示信息进行PDCP PDU的数据重传包括:In a possible implementation manner, the data retransmission of the PDCP PDU by the terminal device according to the retransmission indication information includes:

所述终端设备重传所述PDCP PDU序列号为SN之后的K个数据包。The terminal device retransmits K data packets after the PDCP PDU sequence number is SN.

第五方面,本申请实施例提供一种计算机存储介质,所述计算机存储介质存储有程序,所述程序执行时使得终端设备执行上述第一方面所述的任意一种数据传输方法。In a fifth aspect, an embodiment of the present application provides a computer storage medium, where the computer storage medium stores a program, and when the program is executed, the terminal device executes any one of the data transmission methods described in the first aspect.

第六方面,本申请实施例提供一种计算机存储介质,所述计算机存储介质存储有程序,所述程序执行时使得终端设备执行上述第二方面所述的任意一种数据传输方法。In a sixth aspect, an embodiment of the present application provides a computer storage medium, where the computer storage medium stores a program, and when the program is executed, the terminal device executes any one of the data transmission methods described in the second aspect above.

第七方面,本申请实施例提供一种计算机存储介质,所述计算机存储介质存储有程序,所述程序执行时使得终端设备执行上述第三方面所述的任意一种数据传输方法。In a seventh aspect, an embodiment of the present application provides a computer storage medium, where the computer storage medium stores a program, and when the program is executed, the terminal device executes any one of the data transmission methods described in the third aspect.

第八方面,本申请实施例提供一种计算机存储介质,所述计算机存储介质存储有程序,所述程序执行时使得终端设备执行上述第四方面所述的任意一种数据传输方法。In an eighth aspect, an embodiment of the present application provides a computer storage medium, where the computer storage medium stores a program, and when the program is executed, the terminal device executes any one of the data transmission methods described in the fourth aspect.

第九方面,本申请实施例提供一种第一网络设备,该第一网络设备具有实现第一方面所述的数据传输方法示例中第一网络设备行为的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。In a ninth aspect, an embodiment of the present application provides a first network device, where the first network device has a function of implementing the behavior of the first network device in the example of the data transmission method described in the first aspect. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

第十方面,本申请实施例提供一种第二网络设备,该第二网络设备具有实现第二方面所述的数据传输方法示例中第二网络设备行为的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。In a tenth aspect, an embodiment of the present application provides a second network device, where 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 can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

第十一方面,本申请实施例提供一种第一网络设备,该第一网络设备具有实现第三方面所述的数据传输方法示例中第一网络设备行为的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。In an eleventh aspect, an embodiment of the present application provides a first network device, where 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 can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

第十二方面,本申请实施例提供一种终端设备,该终端设备具有实现第四方面所述的数据传输方法示例中终端设备行为的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。In a twelfth aspect, an embodiment of the present application provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the example of the data transmission method described in the fourth aspect. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

第十三方面,本申请实施例提供一种第一网络设备,该第一网络设备设备可包括接收器、处理器和存储器,所述处理器被配置为支持第一网络设备执行第一方面所述数据传输方法中第一网络设备相应的功能。所述接收器用于与其他设备进行通信。所述存储器用于与处理器耦合,其保存第一网络设备必要的程序指令和数据。In a thirteenth aspect, an embodiment of the present application provides a first network device, where the first network device may include a receiver, a processor, and a memory, and the processor is configured to support the first network device to execute the first aspect. The corresponding function of the first network device in the data transmission method. The receiver is used to communicate with other devices. The memory is for coupling with the processor, and stores necessary program instructions and data for the first network device.

第十四方面,本申请实施例提供一种第二网络设备,该第二网络设备设备可包括发送器、处理器和存储器,所述处理器被配置为支持第二网络设备执行第二方面所述数据传输方法中第二网络设备相应的功能。所述发送器用于与其他设备进行通信。所述存储器用于与处理器耦合,其保存第二网络设备必要的程序指令和数据。In a fourteenth aspect, an embodiment of the present application provides a second network device, where the second network device may include a transmitter, a processor, and a memory, and the processor is configured to support the second network device to perform the execution of the second aspect. The corresponding function of the second network device in the data transmission method. The transmitter is used to communicate with other devices. The memory is for coupling with the processor, and stores necessary program instructions and data for the second network device.

第十五方面,本申请实施例提供一种第一网络设备,该第一网络设备设备可包括发送器、处理器和存储器,所述处理器被配置为支持第一网络设备执行第三方面所述数据传输方法中第一网络设备相应的功能。所述发送器用于与其他设备进行通信。所述存储器用于与处理器耦合,其保存第一网络设备必要的程序指令和数据。In a fifteenth aspect, an embodiment of the present application provides a first network device, where the first network device may include a transmitter, a processor, and a memory, and the processor is configured to support the first network device to execute the third aspect. The corresponding function of the first network device in the data transmission method. The transmitter is used to communicate with other devices. The memory is for coupling with the processor, and stores necessary program instructions and data for the first network device.

第十六方面,本申请实施例提供一种终端设备,该终端设备可包括接收器、处理器和存储器,所述处理器被配置为支持终端设备执行第四方面所述数据传输方法中终端设备相应的功能。所述接收器用于与其他设备进行通信。所述存储器用于与处理器耦合,其保存第一网络设备必要的程序指令和数据。In a sixteenth aspect, an embodiment of the present application provides a terminal device. The terminal device may include a receiver, a processor, and a memory, and the processor is configured to support the terminal device to perform the data transmission method in the fourth aspect. corresponding function. The receiver is used to communicate with other devices. The memory is for coupling with the processor, and stores necessary program instructions and data for the first network device.

第十七方面,本申请实施例提供了一种包含指令的计算机程序产品,当其在计算机上运行时,使得计算机执行第一方面所述的数据传输方法。In a seventeenth aspect, an embodiment of the present application provides a computer program product containing instructions, which, when run on a computer, causes the computer to execute the data transmission method described in the first aspect.

第十八方面,本申请实施例提供了一种包含指令的计算机程序产品,当其在计算机上运行时,使得计算机执行第二方面所述的数据传输方法。In an eighteenth aspect, an embodiment of the present application provides a computer program product containing instructions, which, when executed on a computer, cause the computer to execute the data transmission method described in the second aspect.

第十九方面,本申请实施例提供了一种包含指令的计算机程序产品,当其在计算机上运行时,使得计算机执行第三方面所述的数据传输方法。In a nineteenth aspect, an embodiment of the present application provides a computer program product including instructions, which, when run on a computer, causes the computer to execute the data transmission method described in the third aspect.

第二十方面,本申请实施例提供了一种包含指令的计算机程序产品,当其在计算机上运行时,使得计算机执行第四方面所述的数据传输方法。In a twentieth aspect, the embodiments of the present application provide a computer program product including instructions, which, when executed on a computer, cause the computer to execute the data transmission method described in the fourth aspect.

第二十一方面,本申请实施例提供了一种芯片系统,该芯片系统包括处理器,用于第一网络设备实现上述第一方面中所涉及的功能,例如,生成或处理上述方法中所涉及的数据和/或信息。In a twenty-first aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor for the first network device to implement the functions involved in the first aspect above, for example, to generate or process the functions involved in the above method. the data and/or information involved.

在一个设计方案中,所述芯片系统还包括存储器,所述存储器,用于保存第一网络设备必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包括芯片和其他分立器件。In one design solution, the chip system further includes a memory for storing necessary program instructions and data of the first network device. The chip system may be composed of chips, or may include chips and other discrete devices.

第二十二方面,本申请实施例提供了一种芯片系统,该芯片系统包括处理器,用于第二网络设备实现上述第二方面中所涉及的功能,例如,生成或处理上述方法中所涉及的数据和/或信息。In a twenty-second aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor for a second network device to implement the functions involved in the second aspect above, for example, generating or processing the functions involved in the above method. the data and/or information involved.

在一个设计方案中,所述芯片系统还包括存储器,所述存储器,用于保存第二网络设备必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包括芯片和其他分立器件。In one design solution, the chip system further includes a memory, and the memory is used for storing necessary program instructions and data of the second network device. The chip system may be composed of chips, or may include chips and other discrete devices.

第二十三方面,本申请实施例提供了一种芯片系统,该芯片系统包括处理器,用于第一网络设备实现上述第三方面中所涉及的功能,例如,生成或处理上述方法中所涉及的数据和/或信息。In a twenty-third aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor for the first network device to implement the functions involved in the third aspect above, for example, to generate or process the functions involved in the above method. the data and/or information involved.

在一个设计方案中,所述芯片系统还包括存储器,所述存储器,用于保存第一网络设备必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包括芯片和其他分立器件。In one design solution, the chip system further includes a memory for storing necessary program instructions and data of the first network device. The chip system may be composed of chips, or may include chips and other discrete devices.

第二十四方面,本申请实施例提供了一种芯片系统,该芯片系统包括处理器,用于终端设备实现上述第四方面中所涉及的功能,例如,生成或处理上述方法中所涉及的数据和/或信息。In a twenty-fourth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor for a terminal device to implement the functions involved in the fourth aspect above, for example, generating or processing the functions involved in the above method. data and/or information.

在一个设计方案中,所述芯片系统还包括存储器,所述存储器,用于保存终端设备必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包括芯片和其他分立器件。In a design solution, the chip system further includes a memory for storing necessary program instructions and data of the terminal device. The chip system may be composed of chips, or may include chips and other discrete devices.

附图说明Description of drawings

为了更清楚地说明本申请实施例或背景技术中的技术方案,下面将对本申请实施例或背景技术中所需要使用的附图进行说明。In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the accompanying drawings required in the embodiments or the background technology of the present application will be described below.

图1是本申请实施例公开的一种数据传输系统的结构示意图;1 is a schematic structural diagram of a data transmission system disclosed in an embodiment of the present application;

图2是本申请实施例公开的一种数据传输方法的流程示意图;2 is a schematic flowchart of a data transmission method disclosed in an embodiment of the present application;

图3是本申请实施例公开的另一种数据传输系统的结构示意图;3 is a schematic structural diagram of another data transmission system disclosed in an embodiment of the present application;

图4是本申请实施例公开的另一种数据传输方法的流程示意图;4 is a schematic flowchart of another data transmission method disclosed in an embodiment of the present application;

图5是本申请实施例公开的一种用户面协议栈的结构示意图;5 is a schematic structural diagram of a user plane protocol stack disclosed in an embodiment of the present application;

图6是本申请实施例公开的另一种用户面协议栈的结构示意图;6 is a schematic structural diagram of another user plane protocol stack disclosed in an embodiment of the present application;

图7是本申请实施例公开的另一种数据传输方法的流程示意图;7 is a schematic flowchart of another data transmission method disclosed in an embodiment of the present application;

图8是本申请实施例公开的另一种数据传输方法的流程示意图;8 is a schematic flowchart of another data transmission method disclosed in an embodiment of the present application;

图9是本申请实施例公开的一种第一网络设备的结构示意图;FIG. 9 is a schematic structural diagram of a first network device disclosed in an embodiment of the present application;

图10是本申请实施例公开的另一种第一网络设备的结构示意图;FIG. 10 is a schematic structural diagram of another first network device disclosed in an embodiment of the present application;

图11是本申请实施例公开的一种第二网络设备的结构示意图;FIG. 11 is a schematic structural diagram of a second network device disclosed in an embodiment of the present application;

图12是本申请实施例公开的另一种第二网络设备的结构示意图;FIG. 12 is a schematic structural diagram of another second network device disclosed in an embodiment of the present application;

图13是本申请实施例公开的一种终端设备的结构示意图;FIG. 13 is a schematic structural diagram of a terminal device disclosed in an embodiment of the present application;

图14是本申请实施例公开的另一种终端设备的结构示意图。FIG. 14 is a schematic structural diagram of another terminal device disclosed in an embodiment of the present application.

具体实施方式Detailed ways

下面结合本申请实施例中的附图对本申请实施例进行描述。The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

为了更好的理解本申请实施例公开的数据传输方法、网络设备以及终端设备,下面首先对本申请实施的数据传输系统进行描述。请参见图1,图1是本申请实施例公开的一种数据传输系统的结构示意图,该数据传输系统可以包括终端设备、中继节点(integratedaccess and bachhaul node,IAB node)以及宿主基站(例如IAB donor),例如,图1中的中继节点包括:第一中继节点(例如IAB node 1)、第二中继节点(例如IAB node 2)、第三中继节点(例如IAB node 3)、第四中继节点(例如IAB node 4)。其中,终端设备与IAB node 1建立通信连接,IAB node 1分别和IAB node 2以及IAB node 3建立通信连接,IAB node 2和IAB node 4建立通信连接,IAB node 3和IAB node 4建立通信连接,IAB node 4与IABdonor建立通信连接。IAB node 4和IAB donor之间的链路可以为回传(Backhaul,BH)链路,终端设备和IAB node 1之间的链路可以为接入(Access,AC)链路。In order to better understand the data transmission method, network device, and terminal device disclosed in the embodiments of the present application, the data transmission system implemented in the present application is first described below. Please refer to FIG. 1. 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, a relay node (integrated access and bachhaul node, IAB node), and a host base station (for example, an IAB node). donor), for example, the relay nodes in FIG. 1 include: a first relay node (for example, IAB node 1), a second relay node (for example, IAB node 2), a third relay node (for example, IAB node 3), A fourth relay node (eg IAB node 4). The terminal device establishes a communication connection with the IAB node 1, the IAB node 1 establishes a communication connection with the IAB node 2 and the IAB node 3 respectively, the IAB node 2 establishes a communication connection with the IAB node 4, and the IAB node 3 establishes a communication connection with the IAB node 4, The IAB node 4 establishes a communication connection with the IABdonor. The link between the IAB node 4 and the IAB donor may be a backhaul (Backhaul, BH) link, and the link between the terminal device and the IAB node 1 may be an access (Access, AC) link.

为便于描述,以下定义本申请中的术语的含义:For ease of description, the meanings of terms in this application are defined below:

上行传输:设备向网络传输数据或信号,设备包括终端,IAB node等。Uplink transmission: The device transmits data or signals to the network, and the device includes terminals, IAB nodes, etc.

下行传输:设备接收网络传输的数据或信号,同样地,设备包括终端,IAB node等。Downlink transmission: The device receives data or signals transmitted by the network. Likewise, the device includes terminals, IAB nodes, etc.

上级节点:在上行传输时,接收数据或信号的节点,或者下行传输时发送数据或信号的节点,例如IAB node 1是终端设备的上级节点,IAB node 2是IAB node 1的上级节点,以此类推。应理解,在上行传输时,在发送节点之后进行数据转发的节点都被称为上级节点,即,上级节点不仅限于直接上级节点,直接上级节点是指上行传输时直接接收数据的节点,而不经过其他节点的转发,或者在下行传输时,数据接收节点的直接数据发送节点,而不经过其他节点的转发。Upper-level node: a node that receives data or signals during uplink transmission, or a node that sends data or signals during downlink transmission. For example, IAB node 1 is the upper-level node of the terminal device, and IAB node 2 is the upper-level node of IAB node 1. analogy. It should be understood that during uplink transmission, the nodes that perform data forwarding after the sending node are called upper-level nodes, that is, upper-level nodes are not limited to directly upper-level nodes, and direct-upper nodes refer to nodes that directly receive data during uplink transmission, not After forwarding by other nodes, or during downlink transmission, the data receiving node is the direct data sending node without forwarding by other nodes.

下级节点:在上行传输时,发送数据或信号的节点,或者下行传输时接收数据或信号的节点,例如IAB node 1是IAB node 2的下级节点,IAB node 2是IAB node 4的下级节点等。应理解,在上行传输时,通过数据发送节点发送或转发数据到数据接收节点的所有节点都称为下级节点,即,下级节点不仅限于直接下级节点,直接下级节点是指上行传输时发送的数据被接收节点直接接收到,而不经过其他节点的转发的节点,或者在下行传输时,数据被直接接收,而不经过其他节点的转发的节点。Subordinate node: a node that sends data or signals during uplink transmission, or a node that receives data or signals during downlink transmission. For example, IAB node 1 is the subordinate node of IAB node 2, and IAB node 2 is the subordinate node of IAB node 4. It should be understood that during uplink transmission, all nodes that send or forward data to the data receiving node through the data sending node are called subordinate nodes, that is, subordinate nodes are not limited to direct subordinate nodes, and direct subordinate nodes refer to the data sent during uplink transmission. A node that is directly received by the receiving node without being forwarded by other nodes, or a node that receives data directly without being forwarded by other nodes during downlink transmission.

终端设备向IAB donor传输上行数据时,在一种可能的实现方式中,终端设备可以将数据依次经由IAB node 1、IAB node 2和IAB node 4传输至IAB donor,其中IAB node 1为终端设备的上级节点(即父节点),IAB node 2为IAB node 1的上级节点,IAB node 4为IAB node 2的上级节点,IAB donor为IAB node 4的上级节点。在另一种可能的实现方式中,终端设备可以将数据依次经由IAB node 1、IAB node 3和IAB node 4传输至IABdonor,其中IAB node 1为终端设备的上级节点,IAB node 3为IAB node 1的上级节点,IABnode 4为IAB node 3的上级节点,IAB donor为IAB node 4的上级节点。进一步的,网络设备将数据发送给5G网络中的用户面功能单元(User Plane Function,UPF),服务网关(serving gateway,SGW)设备,或者公用数据网网关(public data network gateway,PGW)设备中的一个或者多个。When the terminal equipment transmits uplink data to the IAB donor, in a possible implementation manner, the terminal equipment can transmit the data to the IAB donor through IAB node 1, IAB node 2 and IAB node 4 in sequence, wherein IAB node 1 is the terminal equipment's data. 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. In another possible implementation manner, the terminal device can transmit data to the IABdonor via IAB node 1, IAB node 3 and IAB node 4 in sequence, where IAB node 1 is the upper-level node of the terminal device, and IAB node 3 is IAB node 1 The superior node of IABnode 4 is the superior node of IAB node 3, and the IAB donor is the superior node of IAB node 4. Further, the network device sends the data to a User Plane Function (UPF), a serving gateway (SGW) device, or a public data network gateway (PGW) device in the 5G network. one or more of.

IAB donor接收来自UPF、SGW设备或者PGW设备的下行数据之后,可以将下行数据传输至终端设备,在一种可能的实现方式中,IAB donor可以将数据依次经由IAB node 4、IAB node 2和IAB node 1传输至终端设备,其中IAB node 4为IAB donor的上级节点,IABnode 2为IAB node 4的上级节点,IAB node 1为IAB node 2的上级节点,终端设备为IABnode 1的上级节点。在另一种可能的实现方式中,IAB donor可以将数据依次经由IAB node4、IAB node 3和IAB node 1传输至终端设备,其中IAB node 4为IAB donor的上级节点,IAB node 3为IAB node 4的上级节点,IAB node 1为IAB node 3的上级节点,终端设备为IAB node 1的上级节点。After receiving the downlink data from the UPF, SGW equipment or PGW equipment, the IAB donor can transmit the downlink data to the terminal equipment. In a possible implementation manner, the IAB donor can transmit the data sequentially through IAB node 4, IAB node 2 and IAB node 1 is transmitted to the terminal equipment, wherein IAB node 4 is the superior node of IAB donor, IABnode 2 is the superior node of IAB node 4, IAB node 1 is the superior node of IAB node 2, and the terminal equipment is the superior node of IABnode 1. In another possible implementation, the IAB donor can transmit the data to the terminal equipment via IAB node4, IAB node 3 and IAB node 1 in sequence, wherein IAB node 4 is the upper node of the IAB donor, and IAB node 3 is the IAB node 4 The upper-level node of IAB node 1 is the upper-level node of IAB node 3, and the terminal device is the upper-level node of IAB node 1.

通常,为了保证数据的可靠传输,在RLC协议中包含ARQ的功能。ARQ通过在数据接收方对发送方的数据进行校验以确认传输是否正确,如果正确接收到发送方的数据,则向发送方发送确认(Acknowledgement,ACK)信号,如果接收方不能正确接收到发送方发送的数据,则向发送方发送不确认(Not-acknowledgement,NACK)信号。对数据进行校验包括对数据进行CRC校验或者在一定的时间内未收到某个数据包。例如,第二中继节点未成功接收到第一中继节点发送的数据,则向第二节点向第一节点发送NACK信号,第一节点在收到NACK后,通过ARQ重新传输数据。自动重传请求可以包括逐跳ARQ和端到端ARQ。Usually, in order to ensure reliable transmission of data, the function of ARQ is included in the RLC protocol. ARQ checks the sender's data at the data receiver to confirm whether the transmission is correct. If the sender's data is received correctly, it sends an acknowledgement (ACK) signal to the sender. If the data is sent by the sender, a Not-acknowledgement (NACK) signal is sent to the sender. Verifying the data includes performing CRC verification on the data or not receiving a certain data packet within a certain period of time. For example, if the second relay node fails to 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 repeat request may include hop-by-hop ARQ and end-to-end ARQ.

逐跳ARQ是指对接收到的每个数据包立即向发送方反馈传输结果,例如,第二中继节点接收到来自第一中继节点的第一数据后会对其进行解码,若解码成功,则返回ACK信号;若解码失败,则返回NACK信号。在第一中继节点接收到来自第二中继节点的ACK信号之后,就向第二中继节点发送第二数据,且从第一中继节点的缓存中删除第一数据;在第一中继节点接收到来自第二中继节点的NACK信号时,第一中继节点重新发送第一数据。示例性的,本申请实施例中的缓存可以为RLC缓存。Hop-by-hop ARQ means that the transmission result is immediately fed back to the sender for each received data packet. For example, the second relay node will decode the first data from the first relay node after receiving it. If the decoding is successful , the ACK signal is returned; if the decoding fails, the NACK signal is returned. 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 cache of the first relay node; in the first relay node When the successor node receives the NACK signal from the second relay node, the first relay node resends the first data. Exemplarily, the cache in this embodiment of the present application may be an RLC cache.

端到端ARQ是指中间节点不对接收到的数据进行解码和反馈,中间节点接收到数据后,转发接收到的数据,数据接收的目标节点接收到数据后,对接收的数据的进行校验,并向数据的发送源反馈接收结果。如果数据接收的目标节点校验失败或者等待过长时间,则反馈NACK,如果正确接收到数据则反馈ACK。End-to-end ARQ means that the intermediate node does not decode and feed back the received data. After the intermediate node receives the data, it forwards the received data. After the data receiving target node receives the data, it verifies the received data. And feedback the receiving result to the sending source of the data. If the target node of data reception fails to check or waits for too long, it will feedback NACK, and if the data is received correctly, it will feedback ACK.

在逐跳ARQ中,第一中继节点收到来自第二中继节点的ACK信号,就从第一中继节点的缓存中删除第二中继节点已经解码成功的数据,如果在进行了ACK反馈后第二中继节点发生链路异常,第二中继节点解码成功的数据无法继续向上级节点发送,即第一中继节点发送给第二中继节点的数据无法在第一中继节点恢复或重传。In hop-by-hop ARQ, when the first relay node receives the ACK signal from the second relay node, it deletes the data that has been successfully decoded by the second relay node from the cache of the first relay node. After the feedback, the second relay node has a link abnormality, 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 sent to the first relay node. Resume or retransmit.

对于端到端ARQ,由于中间节点不反馈ACK/NACK信号,只有接收端才会反馈ACK/NACK信号,如果接收数据的目标节点反馈NACK信号,发送端无法确定具体出现故障的链路,如果继续通过原来的各中间节点重传数据至目标节点,可能还会导致数据失败,这会导致中间节点空口传输资源的浪费,降低空口资源的利用率。For end-to-end ARQ, since the intermediate node does not feed back ACK/NACK signals, only the receiver will feed back ACK/NACK signals. If the target node receiving the data feeds back NACK signals, the sender cannot determine the specific faulty link. Retransmitting data to the target node through the original intermediate nodes may also lead to data failure, which will lead to waste of air interface transmission resources of the intermediate nodes and reduce the utilization rate of air interface resources.

本申请实施例中第一网络设备接收第二网络设备的第一配置信息,第一网络设备根据第一配置信息确定是否进行ARQ反馈。其中,第一网络设备可以为图1中的IAB node,例如,可以为IAB node 1或者IAB node 4,第二网络设备可以为图1中的IAB donor。第一配置信息包括以下信息中的至少一种:第一承载的ARQ反馈信息,第一网络设备的节点标识,第一承载的标识,终端设备的标识,逻辑信道标识,ARQ目标节点标识。本申请实施例可基于IAB donor配置需要进行ARQ反馈的中继节点,则传输路径中的其他中继节点可直接将下级节点发送的数据转发至上级节点,可以进行跨多跳的数据重传恢复,且无需发送端重新将数据通过各中间节点发送至接收端,提升空口资源的利用率。其中,发送端为终端设备时,接收端可以为IAB donor;发送端为IAB donor时,接收端可以为终端设备。In this embodiment of the present application, 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, may be IAB node 1 or IAB node 4, and the second network device may be the IAB donor in FIG. 1 . The first configuration information includes at least one of the following information: ARQ feedback information of the first bearer, node identification of the first network device, identification of the first bearer, identification of terminal equipment, logical channel identification, and ARQ target node identification. In this embodiment of the present application, a relay node that needs to perform ARQ feedback can be configured based on the IAB donor, and other relay nodes in the transmission path can directly forward the data sent by the lower-level node to the upper-level node, and can perform data retransmission recovery across multiple hops , and there is no need for the sender to re-send data to the receiver through each intermediate node, thereby improving the utilization of air interface resources. Wherein, when the sending end is a terminal device, the receiving end can be an IAB donor; when the sending end is an IAB donor, the receiving end can be a terminal device.

本发明实施例的技术方案可以应用于各种通信系统,例如:全球移动通讯(GlobalSystem of Mobile communication,GSM)系统、码分多址(Code Division MultipleAccess,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long TermEvolution,LTE)系统、LTE频分双工(Frequency Division Duplex,FDD)系统、LTE时分双工(Time Division Duplex,TDD)、通用移动通信系统(Universal MobileTelecommunication System,UMTS)、全球互联微波接入(Worldwide Interoperabilityfor Microwave Access,WiMAX)通信系统、第五代移动通信技术(5th-Generation,5G)通信系统或者5G新空口(New Radio,NR)通信系统等。The technical solutions of the embodiments of the present invention can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (Wideband) system Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5th-Generation (5G) communication system or 5G New Radio (New Radio, NR) communication system, etc.

在本发明实施例中,IAB donor可以是用于与移动台通信的设备,具体可以是无线局域网(Wireless Local Area Networks,WLAN)中的接入点(Access Point,AP)、全球移动通信系统(Global System for Mobile Communication,GSM)或码分多址(Code DivisionMultiple Access,CDMA)中的基站收发信台(Base Transceiver Station,BTS)、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)中的基站(NodeB,NB)、LTE系统中的演进型基站(Evolutional Node B,eNB)、中继站或接入点、车载设备、可穿戴设备、未来5G网络中的接入网设备以及未来演进的公共陆地移动网络(Public Land MobileNetwork,PLMN)中的接入网设备等中的任意一种。In this embodiment of the present invention, the IAB donor may be a device for communicating with a mobile station, and may specifically be an Access Point (AP), an Access Point (AP) in a Wireless Local Area Network (Wireless Local Area Networks, WLAN), a Global System for Mobile Communications ( Base Transceiver Station (BTS) in Global System for Mobile Communication (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA), and in Wideband Code Division Multiple Access (WCDMA) Base station (NodeB, NB), evolved base station (Evolutional Node B, eNB) in LTE system, relay station or access point, in-vehicle equipment, wearable equipment, access network equipment in future 5G network and future evolution of public land Any of the access network equipment in the mobile network (Public Land Mobile Network, PLMN).

其中,终端设备也可以称为用户设备(User Equipment,UE)、移动台、接入终端、用户单元、用户站、移动站、远方站、远程终端、移动设备、终端、无线通信设备、用户代理或用户装置等,其具体可以是WLAN中的站点(Station,ST)、蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字处理(Personal Digital Assistant,PDA)、具有无线通信功能的手持设备、计算设备、连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、未来5G网络中的移动台以及未来演进的PLMN网络中的终端设备等中的任意一种。The terminal equipment may also be referred to as User Equipment (UE), mobile station, access terminal, subscriber unit, subscriber station, mobile station, remote station, remote terminal, mobile device, terminal, wireless communication device, user agent or user equipment, etc., which may specifically be a station (Station, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, Personal Digital Assistant (PDA), handheld devices with wireless communication capabilities, computing devices, other processing devices connected to wireless modems, in-vehicle devices, wearable devices, mobile stations in future 5G networks, and future evolved PLMNs Any of the terminal equipment in the network, etc.

基于图1所示的数据传输系统,请参见图2,图2是本申请实施例提供的一种数据传输方法,该方法包括但不限于如下步骤:Based on the data transmission system shown in FIG. 1, please refer to FIG. 2. 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:

步骤S201:第二网络设备向第一网络设备发送第一配置信息。Step S201: The second network device sends first configuration information to the first network device.

以图1所示的数据传输系统为例,如果终端设备经由IAB node 1、IAB node 2以及IAB node 4向IAB donor(即第二网络设备)传输上行数据,第一网络设备可以为IAB node1,第三网络设备可以为IAB node 2或者IAB node 4;或者第一网络设备可以为IAB node2,第三网络设备可以为IAB node 4,第三网络设备为第一网络设备的上级节点。终端设备向IAB donor传输上行数据之前,IAB donor可以向第一网络设备发送第一配置信息。在一种可能的实现方式中,终端设备向IAB donor传输上行数据之前,IAB donor可以向所有或者部分中间节点(即IAB node 1、IAB node 2以及IAB node 4中的一个或者多个)分别发送第一配置信息。Taking the data transmission system shown in FIG. 1 as an example, if the terminal device transmits uplink data to the IAB donor (that is, the second network device) via IAB node 1, IAB node 2 and IAB node 4, the first network device can be IAB node1, 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 is an upper-level node of the first network device. Before the terminal device transmits the uplink data to the IAB donor, the IAB donor may send the first configuration information to the first network device. In a possible implementation manner, before the terminal equipment transmits the uplink data to the IAB donor, the IAB donor may send the data to all or some intermediate nodes (ie, one or more of IAB node 1, IAB node 2 and IAB node 4) respectively. first configuration information.

以图1所示的数据传输系统为例,如果IAB donor经由IAB node 4、IAB node 2以及IAB node 1向终端设备传输下行数据,第一网络设备可以为IAB node 4,第三网络设备可以为IAB node 2或者IAB node 1;或者第一网络设备可以为IAB node 2,第三网络设备可以为IAB node1,第三网络设备为第一网络设备的下级节点。IAB donor向终端设备传输下行数据之前,IAB donor可以向IAB node 4发送第一配置信息。在一种可能的实现方式中,IAB donor向终端设备传输下行数据之前,IAB donor可以向所有或者部分中间节点(即IAB node 4、IAB node 2以及IAB node 1中的一个或者多个)分别发送第一配置信息。Taking the data transmission system shown in FIG. 1 as an example, if 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 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 is a subordinate node of the first network device. Before the IAB donor transmits downlink data to the terminal device, the IAB donor may send the first configuration information to the IAB node 4 . In a possible implementation manner, before the IAB donor transmits downlink data to the terminal equipment, the IAB donor may send the data to all or some intermediate nodes (ie, one or more of IAB node 4, IAB node 2 and IAB node 1) respectively. first configuration information.

其中,第一配置信息可以包括以下信息中的至少一种:第一承载的ARQ反馈信息,第一网络设备的节点标识,第一承载的标识,终端设备的标识,逻辑信道标识,ARQ目标节点标识。第一承载可以包括针对终端设备的数据无线承载(data radio bearer,DRB)、针对终端设备的信令无线承载(signalradio bearer,SRB)或者针对IAB donor的无线承载(radiobearer,RB)。第一网络设备的节点标识可以为第一网络设备的网络之间互连的协议(internet protocol,IP)地址或者媒体介入控制层(media access control,MAC)地址等,用于唯一标识第一网络设备,本申请对节点标识不做限定。第一承载的标识可以为第一承载的标识号(identification,ID),用于唯一标识该第一承载。终端设备的标识可以为终端设备的IP地址、MAC地址、国际移动设备识别码(international mobile equipmentidentity,IMEI),或者国际移动用户识别号(international mobile subscriberidentity,IMSI)等,用于唯一标识该终端设备,本申请对终端设备的标识不做限定。逻辑信道标识可以为逻辑信道的ID,用于唯一标识该逻辑信道,终端设备的逻辑信道与承载一一对应。ARQ目标节点标识可以包括需要进行ARQ反馈的中间节点的节点标识,该节点标识可以为节点名称、IP地址、MAC地址、物理小区标识(Physical Cell Identifier,PCI)、全球小区识别码(Cell Global Identifier,CGI)或者数量全球小区识别码(NR Cell GlobalIdentifier,NCGI)等,用于唯一标识该中间节点。The first configuration information may include at least one of the following information: ARQ feedback information of the first bearer, node identification of the first network device, identification of the first bearer, identification of the terminal device, logical channel identification, ARQ target node logo. The first bearer may include a data radio bearer (DRB) for the terminal device, a signaling 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 a protocol (internet protocol, IP) address or a media access control (media access control, MAC) address of interconnection between networks of the first network device, and is used to uniquely identify the first network equipment, this application does not limit the node identifier. The identifier of the first bearer may be an identification number (identification, ID) of the first bearer, which is used to uniquely identify the first bearer. The identification of the terminal equipment may be the IP address, MAC address, international mobile equipment identity (IMEI) of the terminal equipment, or an international mobile subscriber identity (IMSI), etc., which are used to uniquely identify the terminal equipment. , this application does not limit the identification of the terminal device. 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 the intermediate node that needs to perform ARQ feedback, and the node identifier may be node name, IP address, MAC address, Physical Cell Identifier (PCI), Cell Global Identifier (Cell Global Identifier) , CGI) or number global cell identifier (NR Cell GlobalIdentifier, NCGI), etc., are used to uniquely identify the intermediate node.

其中,第一承载的ARQ反馈信息可以包括端到端反馈、逐跳反馈和反馈指示中的一种,反馈指示用于指示第一网络设备对第一承载的数据进行ARQ反馈或者对第一承载的数据不进行ARQ反馈。其中,端到端反馈或者逐跳反馈可以是系统默认配置的,也可以是第二网络设备配置的,具体不受本申请实施例的限定。The ARQ feedback information of the first bearer may include 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 to perform ARQ feedback on the data of the first bearer or to perform ARQ feedback on the first bearer. The data does not perform ARQ feedback. The end-to-end feedback or the hop-by-hop feedback may be configured by default in the system or configured by the second network device, which is not specifically limited by the embodiments of the present application.

由于第一配置信息是针对第一承载进行配置的,且可以针对每个IAB node进行配置,因此,可以使得两个IAB node在第一承载上作为端点,即,两个IAB node进行ARQ反馈的发送方和接收方,而这两个IAB node之间的IAB node不需要进行ARQ反馈,仅需要进行数据转发,使得ARQ的配置更加灵活。例如,可以配置IAB node 1和IAB node 4作为ARQ的反馈的接收方和发送方,IAB node 4收到IAB node 1发送的第一承载的数据后,根据第一配置信息,确定进行ARQ反馈,IAB node 1接收IAB node 4发送的反馈,而IAB node 1和IAB node4中间的IAB node 2不需要进行反馈,仅需要进行数据转发。Since the first configuration information is configured for the first bearer and can be configured for each IAB node, two IAB nodes can be used as endpoints on the first bearer, that is, the two IAB nodes perform ARQ feedback. The sender and the receiver, and the IAB node between the two IAB nodes does not need to perform ARQ feedback, but only needs to perform data forwarding, which makes the ARQ configuration more flexible. For example, IAB node 1 and IAB node 4 may be configured as the receiver and sender 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, The IAB node 1 receives the feedback sent by the IAB node 4, and the IAB node 2 between the IAB node 1 and the IAB node 4 does not need to perform feedback, but only needs to perform data forwarding.

其中,第一配置信息的ARQ反馈信息对应终端设备的一个或多个第一承载,或者对应终端设备的所有承载。本申请实施例中的终端设备的数量可以为一个或者多个,本申请不做限定。由于一个终端设备可以有多个承载,可以指定其中的一个或者部分承载在某个IAB node上进行ARQ的反馈和/或接收,也可以指定对某个终端设备的所有承载进行ARQ的反馈和/或接收,即ARQ反馈和/或接收的粒度是可以配置的,具体的依赖于实现,本申请不做限定。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 this embodiment 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 part of the bearers can be designated to perform ARQ feedback and/or reception on a certain IAB node, or it can be designated to perform ARQ feedback and/or reception on all bearers of a certain terminal device. Or receiving, that is, the granularity of ARQ feedback and/or receiving is configurable, which depends on the implementation and is not limited in this application.

步骤S202:第一网络设备接收第三网络设备的数据。Step S202: The first network device receives data of the third network device.

以图1所示的数据传输系统为例,如果终端设备经由IAB node 1、IAB node 2以及IAB node 4向IAB donor传输上行数据,第一网络设备为IAB node 1,第三网络设备为终端设备,IAB donor向IAB node 1发送第一配置信息。终端设备向IAB node 1发送第一承载的上行数据之后,IAB node 1可以接收终端设备的第一承载的上行数据。如果终端设备经由IAB node 1、IAB node 2以及IAB node 4向IAB donor传输上行数据,第一网络设备为IABnode 2,第三网络设备为IAB node 1,IAB donor向IAB node 2发送第一配置信息。终端设备将第一承载的上行数据通过IAB node 1发送给IAB node 2之后,IAB node 2可以接收IAB node 1的第一承载的上行数据。Taking the data transmission system shown in Figure 1 as an example, if a terminal device transmits uplink data to an IAB donor via IAB node 1, IAB node 2 and IAB node 4, the first network device is IAB node 1, and the third network device is the terminal device. , the IAB donor sends the first configuration information to the IAB node 1. After the terminal device sends the uplink data of the first bearer to the IAB node 1, the IAB node 1 may receive the uplink data of the first bearer of the terminal device. If the terminal device transmits uplink data to the IAB donor via 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 donor sends the first configuration information to IAB node 2 . After 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 may receive the uplink data of the first bearer of the IAB node 1.

以图1所示的数据传输系统为例,如果IAB donor经由IAB node 4、IAB node 2以及IAB node 1向终端设备传输下行数据,第一网络设备为IAB node 4,第三网络设备为IABdonor,IAB donor向IAB node 4发送第一配置信息。IAB donor向IAB node 4发送第一承载的下行数据之后,IAB node 4接收IAB donor的第一承载的下行数据。如果IAB donor经由IAB node 4、IAB node 2以及IAB node 1向终端设备传输下行数据,第一网络设备为IABnode 2,第三网络设备为IAB node 4,IAB donor向IAB node 2发送第一配置信息。IABdonor通过IAB node 4将第一承载的下行数据发送给IAB node 2之后,IAB node 2接收IABnode 4的第一承载的下行数据。Taking the data transmission system shown in FIG. 1 as an example, if an IAB donor transmits downlink data to a 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 IABdonor, The IAB donor sends the first configuration information to the IAB node 4 . After the IAB donor sends the downlink data of the first bearer to the IAB node 4, the IAB node 4 receives the downlink data of the first bearer of the IAB donor. If 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 information to IAB node 2 . After the IABdonor 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.

步骤S203:第一网络设备根据第一配置信息确定是否进行ARQ反馈。Step S203: The first network device determines whether to perform ARQ feedback according to the first configuration information.

在一种可能的实现方式中,如果ARQ反馈信息包括端到端反馈,如果第一网络设备的标识和ARQ目标节点标识相同,第一网络设备发送ARQ反馈,如果第一网络设备的标识和ARQ目标节点标识不同,第一网络设备不进行ARQ反馈,并转发第一承载的数据。In a possible implementation manner, if the ARQ feedback information includes end-to-end feedback, if the identifier of the first network device is the same as the ARQ target node identifier, the first network device sends ARQ feedback, if the identifier of the first network device and the ARQ If the target node identifiers are different, the first network device does not perform ARQ feedback and forwards the data carried by the first bearer.

具体地,第一网络设备接收到第三网络设备发送的数据后,根据第一配置信息,接收到的数据所对应的承载是否被配置。如果数据对应的承载被配置了,则根据第一配置信息中第一承载的第一承载的ARQ反馈信息确定是否需要进行ARQ反馈,如果需要进行反馈,则根据数据接收的结果进行ARQ ACK或者NACK反馈;或者,如果第一配置信息中的ARQ目标节点标识和第一网络设备的节点标识相同,则也需要进行反馈。如果第一网络设备不需要对所接收的数据进行ARQ反馈,则根据第一配置信息中的ARQ目标节点标识进行数据转发。Specifically, after receiving the data sent by the third network device, the first network device determines whether the bearer corresponding to the received data is configured according to the first configuration information. If the bearer corresponding to the data is configured, it is determined according to the ARQ feedback information of the first bearer of the first bearer in the first configuration information whether ARQ feedback is required, and if feedback is required, ARQ ACK or NACK is performed 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, data forwarding is performed according to the ARQ target node identifier in the first configuration information.

应理解,如果第一网络设备的ARQ反馈方式是默认的,即采用端到端的ARQ反馈或者逐跳的ARQ反馈方式是默认的,如通过协议定义的,则第一承载的ARQ反馈信息不是必须,IAB node仅需要通过ARQ目标节点标识及默认的ARQ反馈方式确定是否反馈。具体地,如果默认的ARQ反馈方式是端到端的方式,那么IAB node的节点标识和ARQ目标节点标识不同时,转发数据;如果默认的ARQ反馈方式是逐跳反馈,这IAB node对所有数据都会进行ARQ反馈。It should be understood that if 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 required. , the IAB node only needs to determine whether to feed back according to the ARQ target node identifier and the default ARQ feedback mode. Specifically, if the default ARQ feedback mode is the end-to-end mode, then when the node ID of the IAB node is different from the ARQ target node ID, the data is forwarded; if the default ARQ feedback mode is hop-by-hop feedback, the IAB node will respond to all data. Perform ARQ feedback.

以图1所示的数据传输系统为例,如果终端设备经由IAB node 1、IAB node 2以及IAB node 4向IAB donor传输上行数据,第一网络设备为IAB node 1,第三网络设备为终端设备,IAB node 1基于第一配置信息确定ARQ反馈信息包括端到端反馈,ARQ目标节点标识为IAB donor。IAB node 1接收终端设备的第一承载的上行数据之后,不进行ARQ反馈,而是将第一承载的上行数据直接转发至IAB node 2。由于IAB node 2不是目标节点,IAB node2不进行ARQ反馈,而是将第一承载的上行数据直接转发至IAB node 4,同样地,IAB node 4接收到数据后,将数据转发给IAB donor,IAB donor可以对接收到的数据进行解码,如果解码成功,IAB donor向终端设备发送ACK信号;如果解码失败,IAB donor向终端设备发送NACK信号,IAB node 1可以选择新的传输路径进行数据重传。Taking the data transmission system shown in Figure 1 as an example, if a terminal device transmits uplink data to an IAB donor via IAB node 1, IAB node 2 and IAB node 4, the first network device is IAB node 1, and the third network device is the terminal device. , the IAB node 1 determines, based on the first configuration information, that the ARQ feedback information includes end-to-end feedback, and the ARQ target node is identified as an 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. Since 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 receiving the data, IAB node 4 forwards the data to the IAB donor, IAB The 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, and the IAB node 1 can select a new transmission path for data retransmission.

在本申请实施例中,由于数据的发送端会保存发送的数据在缓存中,如果收到非确认反馈,则可以进行数据的重传,保证数据的可靠传输。In the embodiment of the present application, since the sending end of the data will save the sent data in the cache, if unacknowledged feedback is received, the data can be retransmitted to ensure reliable data transmission.

以图1所示的数据传输系统为例,如果IAB donor经由IAB node 4、IAB node 2以及IAB node 1向终端设备传输下行数据,第一网络设备为IAB node 4,第三网络设备为IABdonor,IAB node 4基于第一配置信息确定ARQ反馈信息包括端到端反馈,ARQ目标节点标识为终端设备。IAB node 4接收IAB donor的第一承载的下行数据之后,IAB node 4不进行ARQ反馈,而是将第一承载的下行数据转发至IAB node 2。IAB node 2也不进行ARQ反馈,将第一承载的下行数据转发至IAB node 1。IAB node 1接收到数据后,同样地将数据转发给终端设备,终端设备对接收到的数据进行解码,如果解码成功,终端设备向IAB donor发送ACK信号;如果解码失败,终端设备向IAB donor发送NACK信号。IAB donor收到NACK信号后,对数据进行重传。Taking the data transmission system shown in FIG. 1 as an example, if an IAB donor transmits downlink data to a 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 IABdonor, The IAB node 4 determines, based on the first configuration information, that the ARQ feedback information includes end-to-end feedback, and the ARQ target node is identified as a terminal device. After 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 also does not perform ARQ feedback, and forwards the downlink data of the first bearer to IAB node 1. After receiving the data, the IAB node 1 also forwards the data to the terminal equipment, and the terminal equipment decodes the received data. If the decoding succeeds, the terminal equipment sends an ACK signal to the IAB donor; if the decoding fails, the terminal equipment sends an ACK signal to the IAB donor. NACK signal. After the IAB donor receives the NACK signal, it retransmits the data.

在本申请实施例中,可以保证端到端的数据的可靠传输。In this embodiment of the present application, reliable transmission of end-to-end data can be guaranteed.

在一种可能的实现方式中,如果ARQ反馈信息包括逐跳反馈,第一网络设备接收到第一承载的数据时,发送ARQ反馈。In a possible implementation manner, if the ARQ feedback information includes hop-by-hop feedback, the first network device sends ARQ feedback when receiving the data carried by the first bearer.

以图1所示的数据传输系统为例,如果终端设备经由IAB node 1、IAB node 2以及IAB node 4向IAB donor传输上行数据,第一网络设备为IAB node 4,第三网络设备为IABnode 2,IAB donor向IAB node 4发送第一配置信息,IAB node 4基于第一配置信息确定ARQ反馈信息包括逐跳反馈,ARQ目标节点标识为IAB donor。终端设备向IAB node 1发送第一承载的上行数据之后,IAB node 1向终端设备反馈ACK或者NACK,如果解码成功,IABnode1将第一承载的上行数据转发给IAB node 2。IAB node 2向IAB node 1反馈ACK或者NACK,如果解码成功,IAB node 2将第一承载的上行数据转发给IAB node 4。IAB node 4接收到数据后,向IAB node 2发送ACK或者NACK,如果解码成功,则将数据转发给IAB donor。各个IAB node在收到上级节点发送ACK信号,则删除缓存中对应的数据,如果收到上级节点发送的NACK信号,则重新发送数据。Taking the data transmission system shown in FIG. 1 as an example, if the terminal device transmits uplink data to the IAB donor via 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 is identified as the IAB donor. After the terminal device sends the uplink data of the first bearer to the IAB node 1, the IAB node 1 feeds back ACK or NACK to the terminal device. If the decoding is successful, the IAB node1 forwards the uplink data of the first bearer to the IAB node 2. The IAB node 2 feeds back an ACK or NACK to the IAB node 1. If the decoding is successful, the IAB node 2 forwards the uplink data of the first bearer to the IAB node 4. After receiving the data, IAB node 4 sends ACK or NACK to IAB node 2, and if decoding is successful, it forwards the data to the IAB donor. Each IAB node deletes the corresponding data in the cache after receiving the ACK signal sent by the superior node, and resends the data if it receives the NACK signal sent by the superior node.

在本申请实施例中,由于逐跳进行ARQ反馈,可以避免在整个传输路径上的重传,节约了传输资源,提高传输效率。In this embodiment of the present application, since ARQ feedback is performed hop-by-hop, retransmission on the entire transmission path can be avoided, transmission resources are saved, and transmission efficiency is improved.

以图1所示的数据传输系统为例,如果IAB donor经由IAB node 4、IAB node 2以及IAB node 1向终端设备传输下行数据,第一网络设备为IAB node 1,IAB donor向IABnode 1发送第一配置信息,IAB node 1基于第一配置信息确定ARQ反馈信息包括逐跳反馈,ARQ目标节点标识为终端设备。IAB donor向IAB node 4发送第一承载的下行数据之后,IABnode 4向IAB donor反馈ACK或者NACK,如果解码成功,则将第一承载的下行数据转发至IABnode 2。IAB node 2向IAB node 4反馈ACK或NACK,如果解码成功,则将第一承载的下行数据转发至IAB node 1。IAB node 1接收到数据后,向IAB node 2反馈ACK或NACK,如果解码成功,则将第一承载的下行数据转发终端设备。各个IAB node在收到上级节点发送ACK信号,则删除缓存中对应的数据,如果收到上级节点发送的NACK信号,则重新发送数据。Taking the data transmission system shown in Fig. 1 as an example, if an IAB donor transmits downlink data to a terminal device via IAB node 4, IAB node 2 and IAB node 1, the first network device is IAB node 1, and the IAB donor sends the first data to IAB node 1. Configuration information, the IAB node 1 determines, based on the first configuration information, that the ARQ feedback information includes hop-by-hop feedback, and the ARQ target node is identified as a terminal device. After the IAB donor sends the downlink data of the first bearer to the IAB node 4, the IABnode 4 feeds back ACK or NACK to the IAB donor, and if the decoding is successful, it forwards the downlink data of the first bearer to the IABnode 2. IAB node 2 feeds back ACK or NACK to IAB node 4, and if decoding is successful, it forwards the downlink data of the first bearer to IAB node 1. After IAB node 1 receives the data, it feeds back ACK or NACK to IAB node 2, and if decoding is successful, it forwards the downlink data of the first bearer to the terminal device. Each IAB node deletes the corresponding data in the cache after receiving the ACK signal sent by the superior node, and resends the data if it receives the NACK signal sent by the superior node.

在本申请实施例中,由于逐跳进行ARQ反馈,可以避免在整个传输路径上的重传,节约了传输资源,提高传输效率。In this embodiment of the present application, since ARQ feedback is performed hop-by-hop, retransmission on the entire transmission path can be avoided, transmission resources are saved, and transmission efficiency is improved.

在一种可能的实现方式中,如果ARQ反馈信息包括反馈指示,第一网络设备根据反馈指示确定是否对第一承载的数据进行ARQ反馈。此时,IAB node根据反馈指示来确定是否对第一承载的数据进行反馈。与端到端和逐跳反馈不同的是,基于反馈指示的ARQ反馈可以对任意节点进行配置,可以配置某两个IAB node为ARQ反馈的端节点,两个端节点之间的IAB node不需要进行ARQ反馈。所谓端节点是指需要进行ARQ反馈和ARQ接收的一对节点。端节点可以通过第一承载的标识,终端设备的标识,以及第一承载的ARQ反馈信息来进行确定。如果IAB node被配置为对某个终端设备的某个承载进行ARQ反馈,则为端节点。In a possible implementation manner, if the ARQ feedback information includes a feedback indication, the first network device determines whether to perform ARQ feedback on the first bearer data according to the feedback indication. At this time, the IAB node determines whether to feed back the data of the first bearer according to the feedback indication. Unlike end-to-end and hop-by-hop feedback, 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, and the IAB node between the two end nodes does not need to be 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 may be determined by the identifier of the first bearer, the identifier 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 certain bearer of a certain terminal equipment, it is an end node.

以图1所示的数据传输系统为例,如果终端设备经由IAB node 1、IAB node 2以及IAB node 4向IAB donor传输上行数据,第一网络设备为IAB node 1,IAB node 1基于第一配置信息确定ARQ反馈信息包括反馈指示,反馈指示用于指示第一网络设备对终端设备的第一承载进行ARQ反馈。则IAB node 1接收终端设备的第一承载的上行数据之后,向终端设备反馈ACK或者NACK,如果解码成功,则IAB node 1而是将第一承载的上行数据转发至IABnode 2,并对接收到的数据进行缓存。由于反馈指示用于指示IAB node 2不进行ARQ反馈,IAB node 2可以不进行ARQ反馈,而是将第一承载的上行数据直接转发至IAB node 4。由于反馈指示用于指示IAB node 4进行ARQ反馈,IAB node 4接收到数据后,可以对接收到的数据进行解码,如果解码成功,IAB node 4向IAB node 2或者IAB node 1发送ACK信号;如果解码失败,IAB node 4向IAB node 2或者IAB node 1发送NACK信号,IAB node 1可以选择新的传输路径进行数据重传。Taking the data transmission system shown in FIG. 1 as an example, if a terminal device transmits uplink data to an IAB donor via 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, where the feedback indication is used to instruct the first network device to perform ARQ feedback on the first bearer of the terminal device. Then, after receiving the uplink data of the first bearer of the terminal device, the IAB node 1 feeds back ACK or NACK to the terminal device. If the decoding is successful, the IAB node 1 forwards the uplink data of the first bearer to IABnode 2, and responds to the received uplink data. 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 the IAB node 4 to perform ARQ feedback, after receiving the data, the IAB node 4 can decode the received data. If the decoding is successful, the IAB node 4 sends an ACK signal to the IAB node 2 or IAB node 1; if If decoding fails, IAB node 4 sends a NACK signal to IAB node 2 or IAB node 1, and IAB node 1 can select a new transmission path for data retransmission.

在本申请实施例中,如果IAB node 4向IAB node 2发送NACK信号,IAB node 2可以将NACK信号发送至IAB node 1,IAB node 1可以选择新的传输路径进行数据重传,例如IAB node 1将数据经由IAB node 3以及IAB node 4传输至IAB donor,无需终端设备重新将数据经由各个中间节点传输至IAB donor,可提升空口资源利用率。In this embodiment of the present application, if IAB node 4 sends a NACK signal to IAB node 2, IAB node 2 may send the NACK signal to IAB node 1, and IAB node 1 may select a new transmission path for data retransmission, for example, IAB node 1 The data is transmitted to the IAB donor via IAB node 3 and IAB node 4, and the terminal equipment does not need to retransmit the data to the IAB donor via each intermediate node, which can improve the utilization of air interface resources.

以图1所示的数据传输系统为例,如果IAB donor经由IAB node 4、IAB node 2以及IAB node 1向终端设备传输下行数据,第一网络设备为IAB node 4,IAB node 4基于第一配置信息确定ARQ反馈信息包括反馈指示,反馈指示用于指示第一网络设备进行ARQ反馈。IAB node 4接收IAB donor的第一承载的下行数据之后,向IAB donor反馈ACK或者NACK,如果IAB node 4解码成功,则将第一承载的下行数据转发至IAB node 2,并对数据进行缓存。由于反馈指示用于指示IAB node 2不进行ARQ反馈,IAB node 2可以不进行ARQ反馈,而是将第一承载的下行数据直接转发至IAB node 1。由于反馈指示用于指示IAB node1进行ARQ反馈,IAB node 1接收到数据后,可以对接收到的数据进行解码,如果解码成功,IAB node 1向IAB node 2或者IAB node 4发送ACK信号;如果解码失败,IAB node 1向IABnode 2或者IAB node 4发送NACK信号,IAB node 4可以选择新的传输路径进行数据重传。Taking the data transmission system shown in FIG. 1 as an example, if 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, where the feedback indication is used to instruct the first network device to perform ARQ feedback. After receiving the downlink data of the first bearer of the IAB donor, the IAB node 4 feeds back ACK or NACK to the IAB donor. If the IAB node 4 successfully decodes the downlink data of the first bearer, it forwards the downlink data of the first bearer to the IAB node 2 and buffers the data. 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 downlink data of the first bearer to IAB node 1. Since the feedback indication is used to instruct IAB node 1 to perform ARQ feedback, after IAB node 1 receives the data, it can decode the received data. If the decoding is successful, IAB node 1 sends an ACK signal to IAB node 2 or IAB node 4; if decoding is successful, IAB node 1 sends an ACK signal to IAB node 2 or IAB node 4 If it fails, IAB node 1 sends a NACK signal to IAB node 2 or IAB node 4, and IAB node 4 can select a new transmission path for data retransmission.

在本申请实施例中,如果IAB node 1向IAB node 2发送NACK信号,IAB node 2可以将NACK信号发送至IAB node 4,IAB node 4可以选择新的传输路径进行数据重传,例如IAB node 4将数据经由IAB node 3以及IAB node 1传输至终端设备,无需IAB donor重新将数据经由各个中间节点传输至终端设备,可提升空口资源利用率。In this embodiment of the present application, if IAB node 1 sends a NACK signal to IAB node 2, IAB node 2 can send the NACK signal to IAB node 4, and IAB node 4 can select a new transmission path for data retransmission, for example, IAB node 4 The data is transmitted to the terminal equipment through IAB node 3 and IAB node 1, and the IAB donor does not need to retransmit the data to the terminal equipment through each intermediate node, which can improve the utilization of air interface resources.

在一种可能的实现方式中,第一配置信息还可以包括传输方向指示,传输方向指示包括上行传输或者下行传输。如果传输方向指示包括上行传输,第一网络设备只有在接收到上行数据时,根据第一配置信息确定是否进行ARQ反馈。如果传输方向指示包括下行传输,第一网络设备只有在接收到下行数据时,根据第一配置信息确定是否进行ARQ反馈。传输方向指示可以是针对一个终端设备的一个承载,或者多个承载,或者所有的承载进行配置的。应理解,由于传输方向的不同,对同一个终端的设备的上行传输的路径和下行传输的路径可以不同,ARQ的反馈和数据的传输方向的路径应该相同,但是方向相反。因为上行数据传输和下行数据传输的路径可能没有相同的IAB node,而反馈是针对数据传输的,因此,ARQ反馈的路径需要和数据传输的路径相同,但是方向相反。In a possible implementation manner, 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 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 downlink data. The transmission direction indication may be configured for one bearer, or multiple bearers, or all bearers of a terminal device. It should be understood that, due to different transmission directions, the uplink transmission path and downlink transmission path of the equipment of the same terminal may be different, and the paths of ARQ feedback and data transmission directions should be the same, but in opposite directions. Because the paths 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.

在图2所描述的方法中,第二网络设备向第一网络设备发送第一配置信息,第一网络设备接收第三网络设备的数据,第一网络设备根据第一配置信息确定是否进行ARQ反馈,可有效实现数据重传,并提升空口资源的利用率。In the method described in FIG. 2 , the second network device sends first configuration information to the first network device, the first network device receives data of the third network device, and the first network device determines whether to perform ARQ feedback according to the first configuration information , which can effectively realize data retransmission and improve the utilization of air interface resources.

请参见图3,图3是本申请实施例公开的一种数据传输系统的结构示意图,该数据传输系统可以包括终端设备、IAB node以及宿主基站(例如IAB donor),例如,图1中的中继节点包括:第一中继节点(例如IAB node 1)、第二中继节点(例如IAB node 2)、第三中继节点(例如IAB node 3)。其中,终端设备与IAB node 3建立通信连接,IAB node 3分别和IABnode 2以及IAB node 1建立通信连接,IAB node 2和IAB donor建立通信连接,IAB node 1和IAB donor建立通信连接。IAB node 2和IAB donor之间的链路可以为BH链路,IAB node1和IAB donor之间的链路可以为BH链路,终端设备和IAB node 3之间的链路可以为AC链路。Please refer to FIG. 3. 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 donor base station (for example, an IAB donor). For example, the middle The relay nodes include: a first relay node (eg, IAB node 1), a second relay node (eg, IAB node 2), and a third relay node (eg, IAB node 3). The terminal equipment establishes a communication connection with IAB node 3, IAB node 3 establishes communication connection with IAB node 2 and IAB node 1 respectively, IAB node 2 establishes communication connection with IAB donor, and IAB node 1 establishes communication connection with IAB donor. The link between IAB node 2 and the IAB donor may be a BH link, the link between IAB node 1 and the IAB donor may be a BH link, and the link between the terminal equipment and IAB node 3 may be an AC link.

终端设备向IAB donor传输上行数据时,在一种可能的实现方式中,终端设备可以将数据依次经由IAB node 3和IAB node 2传输至IAB donor,其中IAB node 3为终端设备的上级节点(即父节点),IAB node 2为IAB node 3的上级节点,IAB donor为IAB node 2的上级节点。在另一种可能的实现方式中,终端设备可以将数据依次经由IAB node 3和IABnode 1传输至IAB donor,其中IAB node 3为终端设备的上级节点,IAB node 1为IAB node3的上级节点,IAB donor为IAB node 1的上级节点。进一步的,IAB donor可以将上行数据发送至GW设备。When the terminal equipment transmits uplink data to the IAB donor, in a possible implementation manner, the terminal equipment can transmit the data to the IAB donor through IAB node 3 and IAB node 2 in turn, wherein IAB node 3 is the upper-level node of the terminal equipment (ie parent node), IAB node 2 is the upper node of IAB node 3, and IAB donor is the upper node of IAB node 2. In another possible implementation manner, the terminal device may transmit data to the IAB donor via IAB node 3 and IAB node 1 in sequence, where IAB node 3 is the upper-level node of the terminal device, IAB node 1 is the upper-level node of IAB node 3, and IAB The donor is the upper-level node of IAB node 1. Further, the IAB donor can send the uplink data to the GW equipment.

IAB donor接收来自网关设备的下行数据之后,可以将下行数据传输至终端设备,在一种可能的实现方式中,IAB donor可以将数据依次经由IAB node 2和IAB node 3传输至终端设备,其中IAB node 2为IAB donor的上级节点,IAB node 3为IAB node 2的上级节点,终端设备为IAB node 3的上级节点。在另一种可能的实现方式中,IAB donor可以将数据依次经由IAB node 1和IAB node 3传输至终端设备,其中IAB node 1为IAB donor的上级节点,IAB node 3为IAB node 1的上级节点,终端设备为IAB node 3的上级节点。After the IAB donor receives the downlink data from the gateway device, it can transmit the downlink data to the terminal device. In a possible implementation, the IAB donor can transmit the data to the terminal device via IAB node 2 and IAB node 3 in turn, wherein the IAB The node 2 is the upper node of the IAB donor, the IAB node 3 is the upper node of the IAB node 2, and the terminal device is the upper node of the IAB node 3. In another possible implementation manner, the IAB donor can transmit data to the terminal device via IAB node 1 and IAB node 3 in sequence, where IAB node 1 is the upper-level node of the IAB donor, and IAB node 3 is the upper-level node of IAB node 1 , the terminal device is the upper-level node of IAB node 3.

通常,为了保证数据的可靠传输,在RLC协议中包含自动重传请求ARQ的功能。ARQ通过在数据接收方对发送方的数据进行校验以确认传输是否正确,如果正确接收到发送方的数据,则向发送方发送ACK信号,如果接收方不能正确接收到发送方发送的数据,则向发送方发送NACK信号。对数据进行校验包括对数据进行CRC校验或者在一定的时间内未收到某个数据包。例如,第二中继节点未成功接收到第一中继节点发送的数据,则向第二节点向第一节点发送NACK信号,第一节点在收到NACK后,通过ARQ重新传输数据。自动重传请求可以包括逐跳ARQ和端到端ARQ。Generally, in order to ensure reliable transmission of data, the function of automatic repeat request ARQ is included in the RLC protocol. ARQ checks the sender's data at the data receiver to confirm whether the transmission is correct. If the sender's data is received correctly, it sends an ACK signal to the sender. If the receiver cannot receive the sender's data correctly, Then a NACK signal is sent to the sender. Verifying the data includes performing CRC verification on the data or not receiving a certain data packet within a certain period of time. For example, if the second relay node fails to 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 repeat request may include hop-by-hop ARQ and end-to-end ARQ.

逐跳ARQ是指对接收到的每个数据包立即向发送方反馈传输结果,例如,第二中继节点接收到来自第一中继节点的第一数据后会对其进行解码,若解码成功,则返回ACK信号;若解码失败,则返回NACK信号。在第一中继节点接收到来自第二中继节点的ACK信号之后,就向第二中继节点发送第二数据,且从第一中继节点的缓存中删除第一数据;在第一中继节点接收到来自第二中继节点的NACK信号时,第一中继节点重新发送第一数据。Hop-by-hop ARQ means that the transmission result is immediately fed back to the sender for each received data packet. For example, the second relay node will decode the first data from the first relay node after receiving it. If the decoding is successful , the ACK signal is returned; if the decoding fails, the NACK signal is returned. 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 cache of the first relay node; in the first relay node When the successor node receives the NACK signal from the second relay node, the first relay node resends the first data.

端到端ARQ是指中间节点不对接收到的数据进行解码和反馈,中间节点接收到数据后,转发接收到的数据,数据接收的目标节点接收到数据后,对接收的数据的进行校验,并向数据的发送源反馈接收结果。如果数据接收的目标节点校验失败或者等待过长时间,则反馈NACK,如果正确接收到数据则反馈ACK。End-to-end ARQ means that the intermediate node does not decode and feed back the received data. After the intermediate node receives the data, it forwards the received data. After the data receiving target node receives the data, it verifies the received data. And feedback the receiving result to the sending source of the data. If the target node of data reception fails to check or waits for too long, it will feedback NACK, and if the data is received correctly, it will feedback ACK.

在逐跳ARQ中,第一中继节点收到来自第二中继节点的ACK信号,就从第一中继节点的缓存中删除第二中继节点已经解码成功的数据,如果在进行了ACK反馈后第二中继节点发生链路异常,第二中继节点解码成功的数据无法继续向上级节点发送,即第一中继节点发送给第二中继节点的数据无法在第一中继节点恢复或重传。In hop-by-hop ARQ, when the first relay node receives the ACK signal from the second relay node, it deletes the data that has been successfully decoded by the second relay node from the cache of the first relay node. After the feedback, the second relay node has a link abnormality, 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 sent to the first relay node. Resume or retransmit.

对于端到端ARQ,由于中间节点不反馈ACK/NACK信号,只有接收端才会反馈ACK/NACK信号,如果接收数据的目标节点反馈NACK信号,发送端无法确定具体出现故障的链路,如果继续通过原来的各中间节点重传数据至目标节点,可能还会导致数据失败,这会导致中间节点空口传输资源的浪费,降低空口资源的利用率。For end-to-end ARQ, since the intermediate node does not feed back ACK/NACK signals, only the receiver will feed back ACK/NACK signals. If the target node receiving the data feeds back NACK signals, the sender cannot determine the specific faulty link. Retransmitting data to the target node through the original intermediate nodes may also lead to data failure, which will lead to waste of air interface transmission resources of the intermediate nodes and reduce the utilization rate of air interface resources.

本申请实施例中第一网络设备向第三网络设备发送回传指示信息,回传指示信息用于通知第三网络设备接收回传数据,回传数据为第一网络设备发送失败的属于第三网络设备的数据;第一网络设备向第三网络设备发送回传数据;第一网络设备为第三网络设备的上级节点。其中,第一网络设备可以为图1中的IAB node 2,第三网络设备可以为图1中的IAB node 3。IAB node 2为IAB node 3的上级节点。在逐跳反馈中,IAB node 3将数据发送至IAB node 2,IAB node 2对数据解码成功,IAB node 2向IAB node 3发送ACK信号,IABnode 3删除IAB node 3的缓存中存储的该数据。IAB node 2将该数据转发至IAB donor,IAB donor对该数据解码失败,IAB donor向IAB node 2发送NACK信号,IAB node 2可以向IAB node 3发送回传指示信息,并向IAB node 3发送该数据,以便IAB node 3将该数据通过其他路径传输至IAB donor,例如IAB node 3将该数据经由IAB node 1传输至IABdonor,可以进行跨多跳的数据重传恢复。In the embodiment of the present application, the first network device sends the return indication information to the third network device, and the return indication information is used to notify the third network device to receive the return data. data of the network device; the first network device sends back data to the third network device; the first network device is an upper-level node of the third network device. The first network device may be the IAB node 2 in FIG. 1 , and the third network device may be the IAB node 3 in FIG. 1 . IAB node 2 is the upper-level node of IAB node 3. In the hop-by-hop feedback, IAB node 3 sends data to IAB node 2, IAB node 2 successfully decodes the data, 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. The IAB node 2 forwards the data to the IAB donor, the IAB donor fails to decode the data, the IAB donor sends a NACK signal to the IAB node 2, and the IAB node 2 can send the return instruction information to the IAB node 3, and send the IAB node 3 the data so that the IAB node 3 transmits the data to the IAB donor through other paths, for example, the IAB node 3 transmits the data to the IAB donor via the IAB node 1, and data retransmission recovery across multiple hops can be performed.

基于图3所示的数据传输系统,请参见图4,图4是本申请实施例提供的一种数据传输方法,该方法包括但不限于如下步骤:Based on the data transmission system shown in FIG. 3, please refer to FIG. 4. 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:

步骤S401:第一网络设备向第三网络设备发送回传指示信息。Step S401: The first network device sends back transmission indication information to the third network device.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,第一网络设备可以为IAB node 2,第三网络设备可以为IAB node3,第一网络设备为第三网络设备的上级节点。在逐跳反馈中,IAB node 3将上行数据发送至IAB node 2,IAB node 2对上行数据解码成功,IAB node 2向IAB node 3发送ACK信号,IAB node3删除IAB node 3的缓存中存储的该上行数据。IAB node 2将该上行数据转发至IAB donor,IAB donor对该上行数据解码失败,IAB donor向IAB node 2发送NACK信号,IABnode 2可以向IAB node 3发送回传指示信息,回传指示信息用于通知IAB node 3接收回传数据,回传数据即上述上行数据。Taking the data transmission system shown in FIG. 3 as an example, if the terminal device transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, the first network device can be IAB node 2, the third network device can be IAB node 3, and the third network device can be IAB node 3. A network device is an upper-level node of a third network device. In the hop-by-hop feedback, the IAB node 3 sends the uplink data to the IAB node 2, the IAB node 2 successfully decodes the uplink data, the IAB node 2 sends an ACK signal to the IAB node 3, and the IAB node 3 deletes the data stored in the cache of the IAB node 3. upstream data. The IAB node 2 forwards the uplink data to the IAB donor, and the IAB donor fails to decode the uplink data. The IAB donor sends a NACK signal to the IAB node 2, and the IAB node 2 can send the return 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-mentioned uplink data.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,第一网络设备可以为IAB node 2,第三网络设备可以为IABdonor,第一网络设备为第三网络设备的下级节点。在逐跳反馈中,IAB donor将下行数据发送至IAB node 2,IAB node 2对下行数据解码成功,IAB node 2向IAB donor发送ACK信号,IAB donor删除IAB donor的缓存中存储的该下行数据。IAB node 2将该下行数据转发至IAB node 3,IAB node 3对该下行数据解码失败,IAB node 3向IAB node 2发送NACK信号,IAB node 2可以向IAB donor发送回传指示信息,回传指示信息用于通知IAB donor接收回传数据,回传数据即上述下行数据。Taking the data transmission system shown in FIG. 3 as an example, if the IAB donor transmits downlink data to the terminal equipment via IAB node 2 and IAB node 3, the first network equipment may be IAB node 2, the third network equipment may be IABdonor, the first network equipment The network device is a subordinate node of the third network device. In hop-by-hop feedback, the IAB donor sends downlink data to IAB node 2, IAB node 2 successfully decodes the downlink data, IAB node 2 sends an ACK signal to the IAB donor, and the IAB donor deletes the downlink data stored in the IAB donor's buffer. 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, and IAB node 2 can send back instruction information to the IAB donor. The information is used to notify the IAB donor to receive the return data, which is the above-mentioned downlink data.

在一种可能的实现方式中,第一网络设备向第三网络设备发送回传指示信息之前,第一网络设备可以接收IAB donor经由第三网络设备转发的第二配置信息,第二配置信息包括第一指示信息,第一指示信息用于指示第一网络设备在接收到NACK信号时发送回传指示信息。In a possible implementation manner, before the first network device sends the return indication information to the third network device, the first network device may receive the second configuration information forwarded by the IAB donor via the third network device, where the second configuration information includes The first indication information, where the first indication information is used to instruct the first network device to send back the indication information when receiving the NACK signal.

具体实现中,可以是由IAB donor确定链路异常时,主动生成第二配置信息,将该第二配置信息传输至第三网络设备,第三网络设备将该第二配置信息传输至第一网络设备;也可以是第一网络设备向第三网络设备发送链路异常指示信息,第三网络设备将该链路异常指示信息转发到IAB donor之后,IAB donor生成第二配置信息,将该第二配置信息传输至第三网络设备,第三网络设备将该第二配置信息传输至第一网络设备。In specific implementation, when the IAB donor determines that the link is abnormal, it can actively generate the second configuration information, transmit the second configuration information to the third network device, and the third network device transmits the second configuration information to the first network. It can also be that the first network device sends the link abnormality indication information to the third network device, and after the third network device forwards the link abnormality indication information to the IAB donor, the IAB donor generates the second configuration information, and the second The configuration information is transmitted to the third network device, and the third network device transmits the second configuration information to the first network device.

在一种可能的实现方式中,第三网络设备向第一网络设备发送第二配置信息时,需要向第一网络设备发送配置指示信息,不然第一网络设备可能因为自身的上行链路已经失效,而拒绝调度第三网络设备进行上行传输。具体的,该配置指示信息可以是随机接入(RandomAccess,RACH),调度请求(Scheduling Request,SR),缓存状态报告(BufferStateReport,BSR),或预配置的上行授权(pre-configured UL grant),具体不受本申请实施例的限制。In a possible implementation manner, when the third network device sends the second configuration information to the first network device, it needs to send configuration indication information to the first network device, otherwise the first network device may fail because its own uplink , and refuses to schedule the third network device for uplink transmission. Specifically, the configuration indication information may be random access (RandomAccess, RACH), scheduling request (Scheduling Request, SR), buffer state report (BufferStateReport, BSR), or pre-configured uplink grant (pre-configured UL grant), Specifically, it is not limited by the embodiments of the present application.

步骤S402:第三网络设备向第一网络设备发送反馈信息。Step S402: The third network device sends feedback information to the first network device.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,第一网络设备为IAB node 2,第三网络设备为IAB node 3,IABnode 2向IAB node 3发送回传指示信息之后,IAB node 3可以检测是否接收到IAB donor的第二配置信息,第二配置信息用于指示允许中间节点在接收到NACK信号时发送回传指示信息,如果IAB node 3接收到第二配置信息,IAB node 3可以向IAB node 2发送反馈信息,IAB node 2接收该反馈信息。Taking the data transmission system shown in Figure 3 as an example, if the terminal device transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, the first network device is IAB node 2, the third network device is IAB node 3, IAB node 2 After sending the return indication information to the IAB node 3, the IAB node 3 can detect whether the second configuration information of the IAB donor is received, and the second configuration information is used to indicate that the intermediate node is allowed to send the return indication information when receiving the NACK signal, if The IAB node 3 receives the second configuration information, and the IAB node 3 may send feedback information to the IAB node 2, and the IAB node 2 receives the feedback information.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,第一网络设备为IAB node 2,第三网络设备为IAB donor,IABnode 2向IAB donor发送回传指示信息之后,IAB donor可以检测是否存在第二配置信息,第二配置信息用于指示允许中间节点在接收到NACK信号时发送回传指示信息,如果存在第二配置信息,IAB donor可以向IAB node 2发送反馈信息,IAB node 2接收该反馈信息。Taking the data transmission system shown in Fig. 3 as an example, if the IAB donor transmits downlink data to the terminal equipment via IAB node 2 and IAB node 3, the first network equipment is IAB node 2, the third network equipment is the IAB donor, and the IAB node 2 to the terminal equipment. After the IAB donor sends the return indication information, 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 indication information when receiving the NACK signal. If the second configuration information exists, the IAB The donor can send feedback information to the IAB node 2, and the IAB node 2 receives the feedback information.

步骤S403:第一网络设备停止接收第三网络设备发送的数据。Step S403: The first network device stops receiving data sent by the third network device.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,IAB node 3向IAB node 2发送反馈信息,IAB node 2可以停止接收IAB node 3发送的上行数据。Taking the data transmission system shown in FIG. 3 as an example, if the terminal equipment transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, IAB node 3 sends feedback information to IAB node 2, and IAB node 2 can stop receiving IAB node 3 Upstream data sent.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,IAB donor向IAB node 2发送反馈信息,IAB node 2可以停止接收IAB donor发送的下行数据。Taking the data transmission system shown in Figure 3 as an example, if the IAB donor transmits downlink data to the terminal equipment via IAB node 2 and IAB node 3, the IAB donor sends feedback information to IAB node 2, and IAB node 2 can stop receiving the data sent by the IAB donor. Downlink data.

步骤S404:第一网络设备向第三网络设备发送回传数据。Step S404: The first network device sends back data to the third network device.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,IAB node 3向IAB node 2发送反馈信息,IAB node 2可以向IABnode 3发送回传数据,回传数据即IAB node 2发送失败的属于IAB node 3的上行数据。Taking the data transmission system shown in Figure 3 as an example, if the terminal equipment transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, IAB node 3 sends feedback information to IAB node 2, and IAB node 2 can send back to IAB node 3. The data is transmitted, and the return data is the uplink data belonging to IAB node 3 that IAB node 2 fails to send.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,IAB donor向IAB node 2发送反馈信息,IAB node 2可以向IABdonor发送回传数据,回传数据即IAB node 2发送失败的属于IAB donor的下行数据。Taking the data transmission system shown in Figure 3 as an example, if an IAB donor transmits downlink data to terminal equipment via IAB node 2 and IAB node 3, the IAB donor sends feedback information to IAB node 2, and IAB node 2 can send back data to IABdonor , the return data is the downlink data belonging to the IAB donor that IAB node 2 fails to send.

在一种可能的实现方式中,第三网络设备可以将回传数据通过其他路径传输至接收端,具体地,第三网络设备可以根据包含回传数据的数据包上已有的路由信息,重新配置路由路径,例如在原有路由信息的基础上,添加新的路由信息;又如删除原有路由信息,替换为新的路由信息。以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IABnode 2向IAB donor传输上行数据,IAB node 2向IAB node 3发送回传数据之后,IAB node3可以将回传数据经由IAB node 1传输至IAB donor。以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,IAB node 2向IABdonor发送回传数据之后,IAB donor可以将回传数据经由IAB node 1和IAB node 3传输至终端设备。In a possible implementation manner, the third network device may transmit the backhaul data to the receiving end through other paths. Configure routing paths, 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. Taking the data transmission system shown in FIG. 3 as an example, if the terminal equipment transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, after IAB node 2 sends the backhaul data to IAB node 3, IAB node 3 can send the backhaul data via IAB node 1 transmits to IAB donor. Taking the data transmission system shown in Figure 3 as an example, if the IAB donor transmits downlink data to the terminal equipment via IAB node 2 and IAB node 3, after IAB node 2 sends the backhaul data to the IABdonor, the IAB donor can transmit the backhaul data via the IAB. node 1 and IAB node 3 are transmitted to the end device.

在一种可能的实现方式中,第一网络设备可以根据已有的数据传输系统的网络拓扑以及路由信息,重新选择上级节点,将数据经由新的上级节点传输至接收端。以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,第一网络设备可以为IAB node 2。在逐跳反馈中,终端设备将上行数据发送至IABnode 3,IAB node 3将上行数据转发至IAB node 2,如果IAB node 2对上行数据解码失败,IAB node 2向IAB node 3发送NACK信号。IAB node 3可以重新选择上级节点,例如将IABnode 1作为IAB node 3的新的上级节点,IAB node 3将该上行数据经由IAB node 1传输至IAB donor。以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,第一网络设备可以为IAB node 2。在逐跳反馈中,IAB donor将下行数据发送至IAB node 2,IAB node 2对下行数据解码失败,IAB node 2向IAB donor发送NACK信号。IAB donor可以重新选择下级节点,例如将IAB node 1作为IAB donor的新的下级节点,IAB donor将该下行数据经由IAB node 1和IAB node 3传输至终端设备。In a possible implementation manner, the first network device may reselect the upper-level node according to the network topology and routing information of the existing data transmission system, and transmit the data to the receiving end via the new upper-level node. Taking the data transmission system shown in FIG. 3 as an example, if the terminal device transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, the first network device may be IAB node 2. In hop-by-hop feedback, the terminal device sends uplink data to IAB node 3, and IAB node 3 forwards the uplink data to IAB node 2. If IAB node 2 fails to decode the uplink data, IAB node 2 sends a NACK signal to IAB node 3. The IAB node 3 can re-select the upper node, for example, the IAB node 1 is used as a new upper node of the IAB node 3, and the IAB node 3 transmits the uplink data to the IAB donor via the IAB node 1. Taking the data transmission system shown in FIG. 3 as an example, if the IAB donor transmits downlink data to the terminal device via IAB node 2 and IAB node 3, the first network device may be IAB node 2. In the hop-by-hop feedback, the IAB donor sends the 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 a subordinate node, for example, IAB node 1 is used as a new subordinate node of the IAB donor, and the IAB donor transmits the downlink data to the terminal device via IAB node 1 and IAB node 3.

在一种可能的实现方式中,第一网络设备可以将优先级较高的节点作为第一网络设备的上级节点,第一网络设备也可以将IAB donor指定的邻节点作为第一网络设备的上级节点。例如,与IAB donor之间的链路距离越短,该节点的优先级越高,则第一网络设备可以将与IAB donor之间的链路距离较短的节点作为第一网络设备的上级节点。In a possible implementation manner, the first network device may use a node with a higher priority as the superior node of the first network device, and the first network device may also use the adjacent node designated by the IAB donor as the superior node of the first network device node. For example, the shorter the link distance from the IAB donor, the higher the priority of the node, and the first network device may regard the node with the shorter link distance from the IAB donor as the upper-level node of the first network device .

在一种可能的实现方式中,在随机接入过程中或接入完成后的第一条消息,第一网络设备可以向第一网络设备的新的上级节点发送第一网络设备的缓存状态,例如原路由信息,链路异常原因,原因可以由原因值(cause value)来指示,具体原因值的定义依赖于协议,本申请不做限制。In a possible implementation manner, during the random access process or the first message after the access is completed, the first network device may send the cache status of the first network device to a new upper-level node of the first network device, For example, the original routing information, the link abnormality cause, the cause may be indicated by a cause value, and the definition of the specific cause value depends on the protocol, which is not limited in this application.

在一种可能的实现方式中,第一网络设备根据以下一种或者多种可能的条件判决是否启动图4所述的相应流程:在预设时间段内,第一网络设备确定第一网络设备的缓存当前存储的所有数据的数据量总和大于预设数据量阈值;或者在预设时间段内,第一网络设备的回传链路质量小于预设质量阈值;或者所有候选波束小于预设波束阈值;或者波束失败;或者无线链路失效。In a possible implementation manner, 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 that the first network device The sum of the data volume of all data currently stored in the cache is greater than the preset data volume threshold; or within the preset time period, the quality of the backhaul link of the first network device is less than the preset quality threshold; or all candidate beams are less than the preset beam quality threshold; or beam failure; or radio link failure.

在图4描述的方法中,第一网络设备向第三网络设备发送回传指示信息,第三网络设备向第一网络设备发送反馈信息,第一网络设备停止接收第三网络设备发送的上行数据,并向第三网络设备发送回传数据,可有效实现数据重传。In the method described in FIG. 4 , the first network device sends back indication information to the third network device, the third network device sends feedback information to the first network device, and 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.

请参见图5,图5是本申请实施例公开的一种用户面协议栈的结构示意图,该用户面协议栈的用户面包括UE、IAB-node 1、IAB-node 2和IAB-donor。其中,UE的协议栈中从上至下包括业务数据适配协议(Service Data Adaptation Protocol,SDAP)层、分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)层、无线链路控制(Radio LinkControl,RLC)层和MAC层。IAB-node 2与UE通信的协议栈中从上至下包括RLC层和MAC层,IAB-node 2与IAB-node 1通信的协议栈中从上至下包括RLC层、适配层(AdaptationLayer,Adpt)和MAC层。IAB-node 1与IAB-node 2通信的协议栈中从上至下包括RLC层、Adapt层和MAC层,IAB-node 1与IAB-donor通信的协议栈中从上至下包括RLC层、Adpt和MAC层。Please refer to FIG. 5. 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-node 1, IAB-node 2, and IAB-donor. The protocol stack of the UE includes, from top to bottom, a Service Data Adaptation Protocol (SDAP) layer, a Packet Data Convergence Protocol (PDCP) layer, and a Radio Link Control (RLC) layer. ) layer and MAC layer. The protocol stack in which IAB-node 2 communicates with the UE includes the RLC layer and the MAC layer from top to bottom, and the protocol stack in which IAB-node 2 communicates with IAB-node 1 includes the RLC layer and the adaptation layer (AdaptationLayer, Adpt) and MAC layer. The protocol stack that communicates between IAB-node 1 and IAB-node 2 includes the RLC layer, the Adapt layer and the MAC layer from top to bottom, and the protocol stack that communicates between IAB-node 1 and IAB-donor includes the RLC layer, the Adapt layer and the MAC layer from top to bottom and MAC layer.

请参见图6,图6是本申请实施例公开的另一种用户面协议栈的结构示意图,该用户面协议栈具有部分的层2协议栈,例如,数据在终端设备、L2RN和基站之间的转发基于PDCP/RLC/MAC分组数据单元(Packet Data Unit,PDU),基站例如图5中的宿主基站(DonorgNodeB,DgNB)。相应的,数据在中间节点传输可以少经历一些协议层的处理,时延更短,信令开销更小。下图展示了L2relay的一种可能的实现方式:终端设备的PDCP的对等实体在基站,而终端设备的RLC,MAC和PHY等对等实体在RN。节点间转发的是PDCP PDU,PDCP PDU通过PDCP与RLC层之间增加的Adpt进行处理。以下行传输为例:DgNB将PDCP PDU封装成适配层PDU,然后递交给RLC层,适配层添加终端设备的标识,第一承载的标识等信息。RN根据终端设备的标识以及第一承载的标识选择对应的UE DRB对数据进行处理,然后发送给终端设备。其中,Adpt用于RN和DgNB之间转发数据时识别数据所属的终端设备和终端设备的DRB。业务数据适配协议(Service Data Adaptation Protocol,SDAP)是NR相对于LTE新引入的协议层次,用于处理服务质量流(Quality of Serviceflow,QoS flow)到DRB的映射。RN与基站之间的接口还可能是F1AP,GTP隧道,或者是功能扩展的F1应用协议(ApplicationProtocol,AP),F1为连接中心单元(Central Unit,CU)和分布式单元(Distributed Unit,DU)的接口,GPRS隧道协议(GPRSTunnellingProtocol,GTP)隧道等。通用分组无线服务(General Packet Radio Service,GPRS)是以封包式传输。Please refer to FIG. 6. 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 the layer 2 protocol stack. For example, data is between a terminal device, an L2RN, and a base station. The forwarding is based on a PDCP/RLC/MAC packet data unit (Packet Data Unit, PDU), and the base station is, for example, the donor base station (Donorg NodeB, DgNB) in FIG. 5 . Correspondingly, data transmission at the intermediate node can undergo less processing at some protocol layers, resulting in shorter delay and lower signaling overhead. The following figure shows a possible implementation of L2relay: the peer entity of the PDCP of the terminal device is in the base station, and the peer entities of the RLC, MAC and PHY of the terminal device are in the RN. The PDCP PDU is forwarded between nodes, and the PDCP PDU is processed through the Adpt added between the PDCP and the RLC layer. Take the following transmission as an example: the DgNB encapsulates the PDCP PDU into an adaptation layer PDU, and then submits it to the RLC layer, and the adaptation layer adds information such as the identifier of the terminal device and the identifier 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. The Adpt is used to identify the terminal equipment to which the data belongs and the DRB of the terminal equipment when forwarding data between the RN and the DgNB. The Service Data Adaptation Protocol (SDAP) is a protocol layer newly introduced by NR relative to LTE, and is used to process the mapping of Quality of Service flow (Quality of Serviceflow, QoS flow) to DRB. The interface between the RN and the base station may also be an F1AP, a GTP tunnel, or an F1 application protocol (ApplicationProtocol, AP) with extended functions. F1 is a central unit (Central Unit, CU) and a distributed unit (Distributed Unit, DU) interface, GPRS Tunneling Protocol (GPRS Tunnelling Protocol, GTP) tunnel, etc. General Packet Radio Service (GPRS) is a packet transmission.

基于图5、6所示的用户面协议栈,请参见图7,图7是本申请实施例提供的另一种数据传输方法,该方法包括但不限于如下步骤:Based on the user plane protocol stack shown in FIGS. 5 and 6, please refer to FIG. 7. FIG. 7 is another data transmission method provided by an embodiment of the present application, and the method includes but is not limited to the following steps:

步骤S701:第二网络设备向终端设备或第四网络设备发送第三配置信息。Step S701: The second network device sends third configuration information to the terminal device or the fourth network device.

其中,第三配置信息包括重传指示信息,重传指示信息用于指示终端设备或第四网络设备进行数据重传,重传指示信息包括PDCP层的PDU的序列号(Serial Number,SN)。其中第四网络设备是包括PDCP,并能对其上级节点或下级节点的PDCP数据进行处理。The third configuration information includes retransmission indication information, which is used to instruct the terminal device or the fourth network device to perform data retransmission, and the retransmission indication information includes the serial number (Serial Number, SN) of the PDU of the PDCP layer. The fourth network device includes PDCP and can process PDCP data of its upper-level node or lower-level node.

在一种可能的实现方式中,重传指示信息可以包括原因值,和/或重传分组个数K。In a possible implementation manner, the retransmission indication information may include a cause value and/or the number K of retransmission packets.

以图3为例,IAB donor可以向终端设备发送第三配置信息。Taking FIG. 3 as an example, the IAB donor may send the third configuration information to the terminal device.

在一种可能的实现方式中,第二网络设备可以向第一网络设备发送第三配置信息,第一网络设备将该第三配置信息转发至终端设备或第四网络设备。In a possible implementation manner, the second network device may send 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.

以上实现中,由于第四网络设备包括PDCP层,终端设备可以将数据发送给第四网络设备,第四网络设备对终端设备的PDCP数据进行处理,并PDCP层的缓存器中缓存发送的数据。应理解,第四网络设备不必一定是终端设备的直接上级节点,直接上级节点是指终端设备直接将数据发送给第四网络设备,而不需要经过其他网络设备的转发。In the above implementation, since the fourth network device includes the PDCP layer, the terminal device can send data to the fourth network device, and the fourth network device processes the PDCP data of the terminal device, and buffers the sent data in the buffer of the PDCP layer. It should be understood that the fourth network device does not necessarily have to be the direct superior node of the terminal device, and the direct superior node means that the terminal device directly sends data to the fourth network device without forwarding by other network devices.

步骤S702:终端设备或第四网络设备根据重传指示信息进行PDCP PDU的数据重传。Step S702: The terminal device or the fourth network device retransmits the data of the PDCP PDU according to the retransmission indication information.

在一种可能的实现方式中,终端设备或第四网络设备可以根据SN重传所有SN之后的数据。其中,所有SN之后的数据包括所有PDCP PDU的分组数据在SN之后被分配PDCP分组序列号的数据包。In a possible implementation manner, the terminal device or the fourth network device may retransmit all data after the SN according to the SN. Wherein, all the data after the SN includes the packet data of all the PDCP PDUs to which the PDCP packet sequence number is allocated after the SN.

在一种可能的实现方式中,终端设备或第四网络设备重传所述PDCP PDU序列号为SN之后的K个数据包。In a possible implementation manner, the terminal device or the fourth network device retransmits K data packets after the PDCP PDU sequence number is SN.

在本申请实施例中,PDCP层只在以下两种情况下丢弃缓存中的数据包:接收到接收端反馈的PDCP状态报告,把报告中反馈已经成功发送的PDCP包删除;或者超时定时器(discardTimer)到期。也就是说,在逐跳反馈的场景中,如果PDCP的SDU尚未被丢弃,那么可以利用PDCP来进行重传。In the embodiment of the present application, the PDCP layer only discards the data packets in the cache in the following two cases: after receiving the PDCP status report fed back by the receiving end, delete the PDCP packets that have been successfully sent back in the report; or the timeout timer ( discardTimer) expires. That is to say, in the scenario of hop-by-hop feedback, if the SDU of PDCP has not been discarded, PDCP can be used for retransmission.

在图7所描述的方法中,第二网络设备向终端设备或第四网络设备发送第三配置信息,终端设备根据重传指示信息进行PDCP PDU的数据重传,可有效实现数据重传,并提升空口资源的利用率。In the method described in FIG. 7 , 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 the PDCP PDU according to the retransmission indication information, which can effectively realize data retransmission, and Improve the utilization of air interface resources.

基于图3所示的数据传输系统,请参见图8,图8是本申请实施例提供的另一种数据传输方法,该方法包括但不限于如下步骤:Based on the data transmission system shown in FIG. 3, please refer to FIG. 8. 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:

步骤S801:第三网络设备接收第二网络设备的第四配置信息。Step S801: The third network device receives fourth configuration information of the second network device.

第三网络设备可以接收第二网络设备的第四配置信息。第四配置信息包括第二指示信息,第二指示信息用于指示配置一个关于终端设备或者第一承载的数据的缓存。The third network device may receive fourth configuration information of the second network device. The fourth configuration information includes second indication information, where the second indication information is used to instruct to configure a buffer related to the terminal device or the data of the first bearer.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,第三网络设备可以为IAB node 3,第二网络设备可以为IABdonor。IAB donor可以向IAB node 3发送第四配置信息,用于指示IAB node 3建立一个缓存,用于存储关于终端设备的数据或者第一承载的数据。Taking the data transmission system shown in FIG. 3 as an example, if the terminal device transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, the third network device may be IAB node 3, and the second network device may be IABdonor. The IAB donor may send the fourth configuration information to the IAB node 3 for instructing the IAB node 3 to establish a cache for storing the data about the terminal device or the data of the first bearer.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,第三网络设备可以为IAB node 2,第二网络设备可以为IABdonor。IAB donor可以向IAB node 2发送第四配置信息,用于指示IAB node 2建立一个缓存,用于存储关于终端设备的数据或者第一承载的数据。Taking the data transmission system shown in FIG. 3 as an example, if an IAB donor transmits downlink data to a terminal device via IAB node 2 and IAB node 3, the third network device may be IAB node 2, and the second network device may be IABdonor. The IAB donor may send the fourth configuration information to the IAB node 2 for instructing the IAB node 2 to establish a cache for storing the data about the terminal device or the data of the first bearer.

步骤S802:第三网络设备将数据发送给第一网络设备。Step S802: The third network device sends the data to the first network device.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,IAB node 3从终端设备接收到上行数据之后,可以将上行数据发送至IAB node 2。Taking the data transmission system shown in Figure 3 as an example, if the terminal equipment transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, after IAB node 3 receives the uplink data from the terminal equipment, it can send the uplink data to the IAB node. 2.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,IAB donor将下行数据发送给IAB node 2之后,IAB node 2可以将下行数据发送给IAB node 3。Taking the data transmission system shown in Figure 3 as an example, if the IAB donor transmits downlink data to the terminal equipment via IAB node 2 and IAB node 3, after the IAB donor sends the downlink data to IAB node 2, IAB node 2 can send the downlink data. to IAB node 3.

步骤S803:第一网络设备将数据发送给接收端。Step S803: The first network device sends the data to the receiving end.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,IAB node 3将上行数据发送至IAB node 2之后,IAB node 2可以将该上行数据转发至IAB donor。Taking the data transmission system shown in FIG. 3 as an example, if the terminal device transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, after IAB node 3 sends the uplink data to IAB node 2, IAB node 2 can send the uplink data to IAB node 2. Data is forwarded to IAB donor.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,IAB node 2将下行数据发送给IAB node 3之后,IAB node 3可以将该下行数据转发至终端设备。Taking the data transmission system shown in FIG. 3 as an example, if the IAB donor transmits downlink data to the terminal equipment 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 to the terminal equipment. The data is forwarded to the end device.

步骤S804:接收端对数据解码成功时,向第一网络设备发送ACK信号。Step S804: When the receiving end successfully decodes the data, it sends an ACK signal to the first network device.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,IAB node 2将该上行数据转发至IAB donor之后,如果IAB donor对该上行数据解码成功,IAB donor向IAB node 2发送ACK信号。Taking the data transmission system shown in Fig. 3 as an example, if the terminal equipment transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, after IAB node 2 forwards the uplink data to the IAB donor, if the IAB donor sends the uplink data to the IAB donor Decoding is successful, and the IAB donor sends an ACK signal to IAB node 2.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,IAB node 3将该下行数据转发至终端设备之后,如果终端设备对该下行数据解码成功,终端设备向IAB node 3发送ACK信号。Taking the data transmission system shown in Figure 3 as an example, if the IAB donor transmits downlink data to the terminal equipment via IAB node 2 and IAB node 3, after the IAB node 3 forwards the downlink data to the terminal equipment, if the terminal equipment transmits the downlink data to the terminal equipment, If decoding is successful, the terminal device sends an ACK signal to IAB node 3.

步骤S805:第一网络设备将ACK信号转发至第三网络设备。Step S805: The first network device forwards the ACK signal to the third network device.

在一种可能的实现方式中,第一网络设备还可以接收第二网络设备的第五配置信息,第五配置信息包括第三指示信息,第三指示信息用于指示接收到接收端的ACK信号时,将该ACK信号转发至第三网络设备。In a possible implementation manner, the first network device may also 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 that when an ACK signal from the receiving end is received , and forward the ACK signal to the third network device.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,IAB donor向IAB node 2发送ACK信号之后,IAB node 2将该ACK信号转发至IAB node 3。Taking the data transmission system shown in Figure 3 as an example, if the terminal equipment transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, after the IAB donor sends an ACK signal to IAB node 2, IAB node 2 forwards the ACK signal to the IAB donor. IAB node 3.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,终端设备向IAB node 3发送ACK信号之后,IAB node 3将该ACK信号转发至IAB node 2。Taking the data transmission system shown in Figure 3 as an example, if the IAB donor transmits downlink data to the terminal equipment via IAB node 2 and IAB node 3, after the terminal equipment sends an ACK signal to IAB node 3, IAB node 3 forwards the ACK signal to the terminal equipment. IAB node 2.

步骤S806:第三网络设备删除第三网络设备的缓存中存储的该数据。Step S806: The third network device deletes the data stored in the cache of the third network device.

第三网络设备接收到接收端的ACK信号之后,可以确定接收端成功解码数据,进而删除第三网络设备的缓存中存储的该数据。After the third network device receives the ACK signal from the receiver, it can determine that the receiver successfully decodes the data, and then deletes the data stored in the cache of the third network device.

以图3所示的数据传输系统为例,如果终端设备经由IAB node 3和IAB node 2向IAB donor传输上行数据,IAB node 2将该ACK信号转发至IAB node 3之后,IAB node 3可以确定IAB donor成功解码该上行数据,进而删除IAB node 3的缓存中存储的该上行数据。Taking the data transmission system shown in FIG. 3 as an example, if the terminal device transmits uplink data to the IAB donor via IAB node 3 and IAB node 2, after IAB node 2 forwards the ACK signal to IAB node 3, 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.

以图3所示的数据传输系统为例,如果IAB donor经由IAB node 2和IAB node 3向终端设备传输下行数据,IAB node 3将该ACK信号转发至IAB node 2之后,IAB node 2可以确定终端设备成功解码该上行数据,进而删除IAB node 2的缓存中存储的该上行数据。Taking the data transmission system shown in Figure 3 as an example, if the IAB donor transmits downlink data to the terminal equipment via IAB node 2 and IAB node 3, after IAB node 3 forwards the ACK signal to IAB node 2, IAB node 2 can determine the terminal equipment. The device successfully decodes the upstream data, and then deletes the upstream data stored in the cache of the IAB node 2.

在图8所描述的方法中,第三网络设备接收第二网络设备的第四配置信息,在确定接收端成功解码数据之后,删除第三网络设备的缓存中存储的该数据,可有效实现数据重传。In the method described in FIG. 8 , 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 realize the data Retransmission.

上述详细阐述了本申请实施例的方法,下面提供了本申请实施例的相关设备。The methods of the embodiments of the present application are described in detail above, and the related devices of the embodiments of the present application are provided below.

请参见图9,图9是本申请实施例提供的一种第一网络设备的结构示意图,用于实现图2实施例中第一网络设备的功能,第一网络设备的功能块可由硬件、软件或硬件与软件的组合来实施本申请方案。所属领域的技术人员应理解,图9中所描述的功能块可经组合或分离为若干子块以实施本申请方案。因此,本申请中上面描述的内容可支持对下述功能模块的任何可能的组合或分离或进一步定义。Please refer to FIG. 9. FIG. 9 is a schematic structural diagram of a first network device provided by 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 functional blocks of the first network device can be configured by hardware or software. Or a combination of hardware and software to implement the solution of the present application. Those skilled in the art will understand that the functional blocks described in FIG. 9 may be combined or separated into sub-blocks to implement the schemes of the present application. Accordingly, what is described above in this application may support any possible combination or separation or further definition of the functional modules described below.

如图9所示,第一网络设备可包括:接收模块901和处理模块902,其中,各个模块的详细描述如下。As shown in FIG. 9, the first network device may include: a receiving module 901 and a processing module 902, wherein the detailed description of each module is as follows.

接收模块901,用于接收第二网络设备的第一配置信息,所述第一配置信息包括以下信息中的至少一种:第一承载的ARQ反馈信息,所述第一网络设备的节点标识,所述第一承载的标识,终端设备的标识,逻辑信道标识,ARQ目标节点标识;A receiving module 901, 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, 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;

处理模块902,用于根据所述第一配置信息确定是否进行ARQ反馈。The processing module 902 is configured to determine whether to perform ARQ feedback according to the first configuration information.

在一种可能的实现方式中,所述第一承载的ARQ反馈信息包括:端到端反馈、逐跳反馈和反馈指示中的一种;所述反馈指示用于指示所述第一网络设备对所述第一承载的数据进行ARQ反馈或者对所述第一承载的数据不进行ARQ反馈。In a possible implementation manner, 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 indicate that the first network device has a ARQ feedback is performed on the data of the first bearer or no ARQ feedback is performed on the data of the first bearer.

在一种可能的实现方式中,所述第一配置信息的ARQ反馈信息对应所述终端设备的一个或多个所述第一承载,或者对应所述终端设备的所有承载。In a possible implementation manner, 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.

在一种可能的实现方式中,所述第一配置信息还可以包括传输方向指示,所述传输方向指示包括上行传输或者下行传输。In a possible implementation manner, the first configuration information may further include a transmission direction indication, where the transmission direction indication includes uplink transmission or downlink transmission.

在一种可能的实现方式中,所述处理模块902根据所述第一配置信息确定是否进行ARQ反馈,具体用于:In a possible implementation manner, the processing module 902 determines whether to perform ARQ feedback according to the first configuration information, and is specifically used for:

如果所述ARQ反馈信息包括端到端反馈,如果所述第一网络设备的标识和所述ARQ目标节点标识相同,所述第一网络设备发送ARQ反馈,如果所述第一网络设备的标识和所述ARQ目标节点标识不同,所述第一网络设备不进行ARQ反馈,并转发所述第一承载的数据;If the ARQ feedback information includes end-to-end feedback, if the identity of the first network device is the same as the identity of the ARQ target node, the first network device sends ARQ feedback, and if the identity of the first network device and the identity of the ARQ target node are the same, the first network device sends ARQ feedback. The ARQ target node identifiers are different, the first network device does not perform ARQ feedback, and forwards the data of the first bearer;

如果所述ARQ反馈信息包括逐跳反馈,所述第一网络设备接收到所述第一承载的数据时,发送ARQ反馈;If the ARQ feedback information includes hop-by-hop feedback, the first network device sends ARQ feedback when receiving the data carried by the first bearer;

如果所述ARQ反馈信息包括反馈指示,所述第一网络设备根据反馈指示确定是否对所述第一承载的数据进行ARQ反馈。If the ARQ feedback information includes a feedback indication, the first network device determines whether to perform ARQ feedback on the first bearer data according to the feedback indication.

需要说明的是,各个模块的实现还可以对应参照图2所示的实施例的相应描述。It should be noted that, the implementation of each module may also correspond to the corresponding description with reference to the embodiment shown in FIG. 2 .

需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。本申请实施例中的各功能模块可以集成在一个处理模块中,也可以是各个模块单独物理存在,也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. Each functional module in the embodiments of the present application may be integrated into one processing module, or each module may exist physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

本申请实施例提供的另一种第一网络设备,用于实现图4实施例中第一网络设备的功能,第一网络设备的功能块可由硬件、软件或硬件与软件的组合来实施本申请方案。所属领域的技术人员应理解,本申请实施例所描述的功能块可经组合或分离为若干子块以实施本申请方案。因此,本申请中上面描述的内容可支持对下述功能模块的任何可能的组合或分离或进一步定义。Another first network device provided by this embodiment of the present application is used to implement the functions of the first network device in the embodiment of FIG. 4 , and the functional blocks of the first network device can be implemented by hardware, software, or a combination of hardware and software. Program. Those skilled in the art should understand that the functional blocks described in the embodiments of the present application may be combined or separated into several sub-blocks to implement the solutions of the present application. Accordingly, what is described above in this application may support any possible combination or separation or further definition of the functional modules described below.

请参见图9,第一网络设备可包括:发送模块903,其中,各个模块的详细描述如下。Referring to FIG. 9, the first network device may include: a sending module 903, wherein the detailed description of each module is as follows.

发送模块903,用于向第三网络设备发送回传指示信息,所述回传指示信息用于通知所述第三网络设备接收回传数据,所述回传数据为所述第一网络设备发送失败的属于第三网络设备的数据;A sending module 903, configured to send return indication information to a third network device, where the return indication information is used to notify the third network device to receive return data, and the return data is sent by the first network device Failed data belonging to a third network device;

所述发送模块903,还用于向所述第三网络设备发送所述回传数据;The sending module 903 is further configured to send the return data to the third network device;

所述第一网络设备为所述第三网络设备的上级节点。The first network device is an upper-level node of the third network device.

在一种可能的实现方式中,所述第一网络设备还包括:In a possible implementation manner, the first network device further includes:

接收模块901,用于所述发送模块903发送所述回传指示信息后,接收所述第三网络设备发送的反馈信息。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 indication information.

在一种可能的实现方式中,所述第一网络设备还包括:In a possible implementation manner, the first network device further includes:

处理模块902,用于所述接收模块901接收到所述反馈信息后,停止接收所述第三网络设备发送的上行数据。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.

需要说明的是,各个模块的实现还可以对应参照图4所示的实施例的相应描述。It should be noted that, the implementation of each module may also correspond to the corresponding description with reference to the embodiment shown in FIG. 4 .

需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。本申请实施例中的各功能模块可以集成在一个处理模块中,也可以是各个模块单独物理存在,也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. Each functional module in the embodiments of the present application may be integrated into one processing module, or each module may exist physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

请参见图10,图10是本申请实施例公开的一种第一网络设备的结构示意图。如图10所示,该第一网络设备可以包括:至少一个处理器1001、总线1002、接收器1003、发射器1004以及存储器1005。其中,接收器1003、发射器1004、存储器1005以及处理器1001通过总线1002相互连接;总线1002可以是外设部件互连标准(peripheral componentinterconnect,PCI)总线或扩展工业标准结构(extended industry standardarchitecture,EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图10中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。其中,处理器1001可以是中央处理器(Central Processing Unit,CPU),网络处理器(networkprocessor,NP),通用处理器,数字信号处理器(Digital Signal Processor,DSP),专用集成电路(Application-Specific Integrated Circuit,ASIC),现场可编程门阵列(FieldProgrammable Gate Array,FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。在处理器1001是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。接收器1003和发射器1004可以集成为收发器。存储器1005可以存储程序代码、以及第一配置信息,其中:Please refer to FIG. 10. FIG. 10 is a schematic structural diagram of a first network device disclosed in an embodiment of the present application. As shown in FIG. 10 , 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, etc. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one 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 (Central Processing Unit, CPU), a network processor (network processor, NP), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application-Specific integrated circuit) Integrated Circuit, ASIC), Field Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. In the case where the processor 1001 is a CPU, the CPU may be a single-core CPU or a multi-core CPU. The receiver 1003 and the transmitter 1004 may be integrated into a transceiver. The memory 1005 can store program code, and first configuration information, wherein:

接收器1003接收第二网络设备的第一配置信息,所述第一配置信息包括以下信息中的至少一种:第一承载的自动重传请求ARQ反馈信息,所述第一网络设备的节点标识,所述第一承载的标识,终端设备的标识,逻辑信道标识,ARQ目标节点标识;The receiver 1003 receives the first configuration information of the second network device, the first configuration information includes at least one of the following information: the automatic repeat request ARQ feedback information of the first bearer, the 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;

处理器1001根据所述第一配置信息确定是否进行ARQ反馈。The processor 1001 determines whether to perform ARQ feedback according to the first configuration information.

在一种可能的实现方式中,所述第一承载的ARQ反馈信息包括:端到端反馈、逐跳反馈和反馈指示中的一种;所述反馈指示用于指示所述第一网络设备对所述第一承载的数据进行ARQ反馈或者对所述第一承载的数据不进行ARQ反馈。In a possible implementation manner, 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 indicate that the first network device has a ARQ feedback is performed on the data of the first bearer or no ARQ feedback is performed on the data of the first bearer.

在一种可能的实现方式中,所述第一配置信息的ARQ反馈信息对应所述终端设备的一个或多个所述第一承载,或者对应所述终端设备的所有承载。In a possible implementation manner, 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.

在一种可能的实现方式中,所述第一配置信息还可以包括传输方向指示,所述传输方向指示包括上行传输或者下行传输。In a possible implementation manner, the first configuration information may further include a transmission direction indication, where the transmission direction indication includes uplink transmission or downlink transmission.

在一种可能的实现方式中,处理器1001根据所述第一配置信息确定是否进行ARQ反馈,具体可以为:In a possible implementation manner, the processor 1001 determines whether to perform ARQ feedback according to the first configuration information, which may specifically be:

如果所述ARQ反馈信息包括端到端反馈,如果所述第一网络设备的标识和所述ARQ目标节点标识相同,发射器1004发送ARQ反馈,如果所述第一网络设备的标识和所述ARQ目标节点标识不同,发射器1004不进行ARQ反馈,接收器1003转发所述第一承载的数据;If the ARQ feedback information includes end-to-end feedback, if the identity of the first network device and the ARQ target node identity are the same, the transmitter 1004 sends ARQ feedback, if the identity of the first network device and the ARQ If the target node identifiers are different, the transmitter 1004 does not perform ARQ feedback, and the receiver 1003 forwards the data of the first bearer;

如果所述ARQ反馈信息包括逐跳反馈,接收器1003接收到所述第一承载的数据时,发射器1004发送ARQ反馈;If the ARQ feedback information includes hop-by-hop feedback, when the receiver 1003 receives the data carried by the first bearer, the transmitter 1004 sends ARQ feedback;

如果所述ARQ反馈信息包括反馈指示,处理器1001根据反馈指示确定是否对所述第一承载的数据进行ARQ反馈。If the ARQ feedback information includes a feedback indication, the processor 1001 determines whether to perform ARQ feedback on the data of the first bearer according to the feedback indication.

应当理解,第一网络设备仅为本申请实施例提供的一个例子,并且,第一网络设备可具有比示出的部件更多或更少的部件,可以组合两个或更多个部件,或者可具有部件的不同配置实现。It should be understood that the first network device is only an example provided by the embodiments 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 configurations of components are possible.

具体的,本申请实施例中介绍的第一网络设备可以用以实施本申请结合图2介绍的方法实施例中的部分或全部流程。Specifically, 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 introduced in the present application in conjunction with FIG. 2 .

在本申请另一实施例中,如图10所示,存储器1005可以存储程序代码、回传指示信息以及回传数据,其中:In another embodiment of the present application, as shown in FIG. 10 , the memory 1005 may store program codes, return instruction information, and return data, wherein:

发射器1004向第三网络设备发送回传指示信息,所述回传指示信息用于通知所述第三网络设备接收回传数据,所述回传数据为所述第一网络设备发送失败的属于第三网络设备的数据;The transmitter 1004 sends the return indication information to the third network device, where the return indication information is used to notify the third network device to receive the return data, and the return data belongs to the one that the first network device fails to send. data of third network devices;

发射器1004向所述第三网络设备发送所述回传数据;The transmitter 1004 sends the backhaul data to the third network device;

所述第一网络设备为所述第三网络设备的上级节点。The first network device is an upper-level node of the third network device.

在一种可能的实现方式中,在发射器1004发送所述回传指示信息后,接收器1003接收所述第三网络设备发送的反馈信息。In a possible implementation manner, after the transmitter 1004 sends the return indication information, the receiver 1003 receives the feedback information sent by the third network device.

在一种可能的实现方式中,在接收器1003接收到所述反馈信息后,处理器1001停止接收所述第三网络设备发送的上行数据。In a possible implementation manner, after the receiver 1003 receives the feedback information, the processor 1001 stops receiving the uplink data sent by the third network device.

应当理解,第一网络设备仅为本申请实施例提供的一个例子,并且,第一网络设备可具有比示出的部件更多或更少的部件,可以组合两个或更多个部件,或者可具有部件的不同配置实现。It should be understood that the first network device is only an example provided by the embodiments 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 configurations of components are possible.

具体的,本申请实施例中介绍的第一网络设备可以用以实施本申请结合图4介绍的方法实施例中的部分或全部流程。Specifically, 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 introduced in the present application in conjunction with FIG. 4 .

请参见图11,图11是本申请实施例提供的一种第二网络设备的结构示意图,用于实现图2实施例中第二网络设备的功能,第二网络设备的功能块可由硬件、软件或硬件与软件的组合来实施本申请方案。所属领域的技术人员应理解,图11中所描述的功能块可经组合或分离为若干子块以实施本申请方案。因此,本申请中上面描述的内容可支持对下述功能模块的任何可能的组合或分离或进一步定义。Please refer to FIG. 11. FIG. 11 is a schematic structural diagram of a second network device provided by an embodiment of the present application, which is used to implement the functions of the second network device in the embodiment of FIG. 2. The functional blocks of the second network device can be configured by hardware or software. Or a combination of hardware and software to implement the solution of the present application. Those skilled in the art will understand that the functional blocks described in FIG. 11 may be combined or separated into sub-blocks to implement the schemes of the present application. Accordingly, what is described above in this application may support any possible combination or separation or further definition of the functional modules described below.

如图11所示,第二网络设备可包括:处理模块1101和发送模块1102,其中,各个模块的详细描述如下。As shown in FIG. 11 , the second network device may include: a processing module 1101 and a sending module 1102, wherein the detailed description of each module is as follows.

处理模块1101,用于确定第一配置信息,所述第一配置信息包括以下信息中的至少一种:第一承载的自动重传请求ARQ反馈方式,所述第一网络设备的节点标识,所述第一承载的标识,终端设备的标识,逻辑信道标识,ARQ目标节点标识;The processing module 1101 is configured to determine first configuration information, where the first configuration information includes at least one of the following information: the automatic repeat request ARQ feedback mode of the first bearer, the node identifier of the first network device, the The identifier of the first bearer, the identifier of the terminal device, the logical channel identifier, and the ARQ target node identifier;

发送模块1102,用于向第一网络设备发送第一配置信息。The sending module 1102 is configured to send the first configuration information to the first network device.

在一种可能的实现方式中,所述第一承载的ARQ反馈信息包括:端到端反馈、逐跳反馈和反馈指示中的一种;所述反馈指示用于指示所述第一网络设备对所述第一承载的数据进行ARQ反馈或者对所述第一承载的数据不进行ARQ反馈。In a possible implementation manner, 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 indicate that the first network device has a ARQ feedback is performed on the data of the first bearer or no ARQ feedback is performed on the data of the first bearer.

在一种可能的实现方式中,所述第一配置信息还可以包括传输方向指示,所述传输方向指示包括上行传输或者下行传输。In a possible implementation manner, the first configuration information may further include a transmission direction indication, where the transmission direction indication includes uplink transmission or downlink transmission.

需要说明的是,各个模块的实现还可以对应参照图2所示的实施例的相应描述。It should be noted that, the implementation of each module may also correspond to the corresponding description with reference to the embodiment shown in FIG. 2 .

需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。本申请实施例中的各功能模块可以集成在一个处理模块中,也可以是各个模块单独物理存在,也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. Each functional module in the embodiments of the present application may be integrated into one processing module, or each module may exist physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

请参见图12,图12是本申请实施例公开的一种第二网络设备的结构示意图。如图10所示,该第二网络设备可以包括:至少一个处理器1201、总线1202、接收器1203、发射器1204以及存储器1205。其中,接收器1203、发射器1204、存储器1205以及处理器1201通过总线1202相互连接;总线1202可以是PCI总线或EISA总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图12中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。其中,处理器1201可以是CPU,NP,通用处理器,DSP,ASIC,FPGA或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。在处理器1201是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。接收器1203和发射器1204可以集成为收发器。存储器1205可以存储程序代码、以及第一配置信息,其中:Referring to FIG. 12, FIG. 12 is a schematic structural diagram of a second network device disclosed in an embodiment of the present application. As shown in FIG. 10 , 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 or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one 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, NP, general-purpose processor, DSP, ASIC, FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. In the case where 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 can store program code, and first configuration information, wherein:

处理器1201,用于确定第一配置信息,所述第一配置信息包括以下信息中的至少一种:第一承载的自动重传请求ARQ反馈信息,所述第一网络设备的节点标识,所述第一承载的标识,终端设备的标识,逻辑信道标识,ARQ目标节点标识;The processor 1201 is configured to determine first configuration information, where the first configuration information includes at least one of the following information: the automatic repeat request ARQ feedback information of the first bearer, the node identifier of the first network device, the The identifier of the first bearer, the identifier of the terminal device, the logical channel identifier, and the ARQ target node identifier;

发射器1204,用于向第一网络设备发送第一配置信息。The transmitter 1204 is configured to send the first configuration information to the first network device.

在一种可能的实现方式中,所述第一承载的ARQ反馈信息包括:端到端反馈、逐跳反馈和反馈指示中的一种;所述反馈指示用于指示所述第一网络设备对所述第一承载的数据进行ARQ反馈或者对所述第一承载的数据不进行ARQ反馈。In a possible implementation manner, 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 indicate that the first network device has a ARQ feedback is performed on the data of the first bearer or no ARQ feedback is performed on the data of the first bearer.

在一种可能的实现方式中,所述第一配置信息还可以包括传输方向指示,所述传输方向指示包括上行传输或者下行传输。In a possible implementation manner, the first configuration information may further include a transmission direction indication, where the transmission direction indication includes uplink transmission or downlink transmission.

应当理解,第二网络设备仅为本申请实施例提供的一个例子,并且,第二网络设备可具有比示出的部件更多或更少的部件,可以组合两个或更多个部件,或者可具有部件的不同配置实现。It should be understood that the second network device is only an example provided by the embodiments 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 configurations of components are possible.

具体的,本申请实施例中介绍的第二网络设备可以用以实施本申请结合图2介绍的方法实施例中的部分或全部流程。Specifically, the second 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 introduced in the present application in conjunction with FIG. 2 .

请参见图13,图13是本申请实施例提供的一种终端设备或第四网络设备的结构示意图,用于实现图7实施例中终端设备或第四网络设备的功能,终端设备或第四网络设备的功能块可由硬件、软件或硬件与软件的组合来实施本申请方案。所属领域的技术人员应理解,图13中所描述的功能块可经组合或分离为若干子块以实施本申请方案。因此,本申请中上面描述的内容可支持对下述功能模块的任何可能的组合或分离或进一步定义。Please refer to FIG. 13. FIG. 13 is a schematic structural diagram of a terminal device or a fourth network device provided by 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 terminal device or the fourth network device The functional blocks of the network device can be implemented by hardware, software, or a combination of hardware and software to implement the solution of the present application. Those skilled in the art will understand that the functional blocks described in FIG. 13 may be combined or separated into sub-blocks to implement the schemes of the present application. Accordingly, what is described above in this application may support any possible combination or separation or further definition of the functional modules described below.

如图13所示,终端设备或第四网络设备可包括:接收模块1301和处理模块1302,其中,各个模块的详细描述如下。As shown in FIG. 13, the terminal device or the fourth network device may include: a receiving module 1301 and a processing module 1302, wherein the detailed description of each module is as follows.

接收模块1301,用于接收来自第二网络设备的第三配置信息,所述第三配置信息包括重传指示信息,所述重传指示信息用于指示所述终端设备或第四网络设备进行数据重传,所述重传指示信息包括分组数据汇聚协议PDCP层的分组数据单元PDU的SN;The receiving module 1301 is configured to receive third configuration information from the second network device, where the third configuration information includes retransmission indication information, and the retransmission indication information is used to instruct the terminal device or the fourth network device to perform data retransmission, the retransmission indication information includes the SN of the packet data unit PDU of the PDCP layer of the Packet Data Convergence Protocol;

处理模块1302,用于根据所述重传指示信息进行PDCP PDU的数据重传。The processing module 1302 is configured to perform data retransmission of the PDCP PDU according to the retransmission indication information.

在一种可能的实现方式中,所述重传指示信息包括原因值,和/或重传分组个数K。In a possible implementation manner, the retransmission indication information includes a cause value and/or the number K of retransmission packets.

在一种可能的实现方式中,所述处理模块1302,具体用于:In a possible implementation manner, the processing module 1302 is specifically configured to:

根据所述SN重传所有SN之后的数据;Retransmit all data after the SN according to the SN;

所述所有SN之后的数据包括所有PDCP PDU的分组数据在所述SN之后被分配PDCP分组序列号的数据包。The data after all the SNs includes the packet data of all PDCP PDUs to which PDCP packet sequence numbers are assigned after the SN.

在一种可能的实现方式中,所述处理模块1302,具体用于:In a possible implementation manner, the processing module 1302 is specifically configured to:

重传所述PDCP PDU序列号为SN之后的K个数据包。Retransmit K data packets after the PDCP PDU sequence number is SN.

需要说明的是,各个模块的实现还可以对应参照图7所示的实施例的相应描述。It should be noted that, the implementation of each module may also correspond to the corresponding description with reference to the embodiment shown in FIG. 7 .

需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。本申请实施例中的各功能模块可以集成在一个处理模块中,也可以是各个模块单独物理存在,也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. Each functional module in the embodiments of the present application may be integrated into one processing module, or each module may exist physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

请参见图14,图14是本申请实施例公开的一种终端设备或第四网络设备的结构示意图。如图14所示,该终端设备或第四网络设备可以包括:至少一个处理器1401、总线1402、接收器1403、发射器1404以及存储器1405。其中,接收器1403、发射器1404、存储器1405以及处理器1401通过总线1402相互连接;总线1402可以是PCI总线或EISA总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图14中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。其中,处理器1401可以是CPU,NP,通用处理器,DSP,ASIC,FPGA或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。在处理器1401是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。接收器1403和发射器1404可以集成为收发器。存储器1405可以存储程序代码、以及第三配置信息,其中:Please refer to FIG. 14. FIG. 14 is a schematic structural diagram of a terminal device or a fourth network device disclosed in an embodiment of the present application. As shown in FIG. 14 , 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 or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is shown 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, NP, general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. In the case where 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 into a transceiver. The memory 1405 can store program code, and third configuration information, wherein:

接收器1403接收来自第二网络设备的第三配置信息,所述第三配置信息包括重传指示信息,所述重传指示信息用于指示所述终端设备或第四网络设备进行数据重传,所述重传指示信息包括分组数据汇聚协议PDCP层的分组数据单元PDU的SN;The receiver 1403 receives third configuration information from the second network device, where the third configuration information includes retransmission indication information, where the retransmission indication information is used to instruct the terminal device or the fourth network device to perform data retransmission, The retransmission indication information includes the SN of the packet data unit PDU of the PDCP layer of the Packet Data Convergence Protocol;

处理器1401根据所述重传指示信息进行PDCP PDU的数据重传。The processor 1401 performs data retransmission of the PDCP PDU according to the retransmission indication information.

在一种可能的实现方式中,所述重传指示信息包括原因值,和/或重传分组个数K。In a possible implementation manner, the retransmission indication information includes a cause value and/or the number K of retransmission packets.

在一种可能的实现方式中,处理器1401根据所述SN重传所有SN之后的数据;In a possible implementation manner, the processor 1401 retransmits all data after the SN according to the SN;

所述所有SN之后的数据包括所有PDCP PDU的分组数据在所述SN之后被分配PDCP分组序列号的数据包。The data after all the SNs includes the packet data of all PDCP PDUs to which PDCP packet sequence numbers are assigned after the SN.

在一种可能的实现方式中,处理器1401重传所述PDCP PDU序列号为SN之后的K个数据包。In a possible implementation manner, the processor 1401 retransmits K data packets after the PDCP PDU sequence number is SN.

应当理解,终端设备或第四网络设备仅为本申请实施例提供的一个例子,并且,终端设备或第四网络设备可具有比示出的部件更多或更少的部件,可以组合两个或更多个部件,或者可具有部件的不同配置实现。It should be understood that the terminal device or the fourth network device is only an example provided by the embodiments of the present application, and the terminal device or the fourth network device may have more or less components than those shown, and may combine two or More components, or may be implemented with different configurations of components.

具体的,本申请实施例中介绍的第二网络设备可以用以实施本申请结合图7介绍的方法实施例中的部分或全部流程。Specifically, the second 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 introduced in the present application in conjunction with FIG. 7 .

在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线)或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质,(例如,软盘、存储盘、磁带)、光介质(例如,DVD)、或者半导体介质(例如固态存储盘Solid State Disk(SSD))等。In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line) or wireless (eg, infrared, wireless, microwave, etc.). 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, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, storage disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), among others.

Claims (27)

1. A method of data transmission, the method comprising:
the method comprises the steps that a first network device receives first configuration information of a second network device, wherein the first configuration information comprises at least one of the following information: automatic repeat request ARQ feedback information of a first bearer, a node identifier of the first network equipment, an identifier of the first bearer, an identifier of terminal equipment, a logical channel identifier and an ARQ target node identifier;
the first network equipment 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 a feedback indication, where the feedback indication is used to indicate that the first network device performs ARQ feedback on the data of the first bearer or does not perform ARQ feedback on the data of the first bearer;
the determining, by the first network device according to the first configuration information, whether to perform ARQ feedback includes:
if the ARQ feedback information comprises end-to-end feedback, if the identifier of the first network equipment is the same as the identifier of the ARQ target node, the first network equipment sends ARQ feedback, and if the identifier of the first network equipment is different from the identifier of the ARQ target node, the first network equipment does not carry out ARQ feedback and forwards the data of the first bearer;
if the ARQ feedback information comprises hop-by-hop feedback, the first network equipment sends ARQ feedback when receiving the data of the first bearer;
and if the ARQ feedback information comprises a feedback indication, the first network equipment determines whether to perform ARQ feedback on the data of the first bearer according to the feedback indication.
2. The method of claim 1, wherein the ARQ feedback information for the first configuration information corresponds to one or more of the first bearers for the terminal device or to all bearers for the terminal device.
3. The method of any of claims 1-2, wherein the first configuration information further comprises a transmission direction indication, the transmission direction indication comprising an uplink transmission or a downlink transmission.
4. A method of data transmission, the method comprising:
the second network equipment determines first configuration information, wherein the first configuration information comprises at least one of the following information: the method comprises the steps that automatic repeat request ARQ feedback information of a first bearer, a node identifier of first network equipment, an identifier of the first bearer, an identifier of terminal equipment, a logical channel identifier and an ARQ target node identifier are obtained;
the second network device sends 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 a feedback indication; the feedback indication is used for indicating the first network device to perform ARQ feedback on the data of the first bearer or not to perform ARQ feedback on the data of the first bearer.
5. The method of claim 4, wherein the first configuration information further comprises a transmission direction indication, and the transmission direction indication comprises an uplink transmission or a downlink transmission.
6. A method of data transmission, the method comprising:
the method comprises the steps that a first network device sends back transmission indicating information to a third network device, wherein the back transmission indicating information is used for informing the third network device to receive back transmission data, and the back transmission data is data which is failed to be sent to a superior node by the first network device and belongs to the third network device;
the first network device sends the backhaul data to the third network device;
the first network device is a superior node of the third network device.
7. The method of claim 6, further comprising: and after the first network equipment sends the return indication information, receiving feedback information sent by the third network equipment.
8. The method of claim 7, further comprising: and after receiving the feedback information, the first network equipment stops receiving the uplink data sent by the third network equipment.
9. A method of data transmission, the method comprising:
the terminal equipment receives third configuration information from second network equipment, wherein the third configuration information comprises retransmission indication information, the retransmission indication information is used for indicating the terminal equipment to carry out data retransmission, and the retransmission indication information comprises a serial number SN of a packet data unit PDU of a packet data convergence protocol PDCP layer;
the terminal equipment retransmits the data of the PDCP PDU according to the retransmission indication information;
the terminal equipment performs data retransmission of the PDCP PDU according to the retransmission indication information, and comprises the following steps:
the terminal equipment retransmits data after all SNs according to the SNs;
the data after all SNs includes a data packet to which packet data of all PDCP PDUs is assigned a PDCP packet sequence number after the SNs.
10. The method of claim 9, wherein the retransmission indication information comprises a cause value, and/or a number of retransmitted packets, K.
11. The method of claim 10, wherein the terminal device performing data retransmission of PDCP PDUs according to the retransmission indication information comprises:
the terminal equipment retransmits data after all SNs according to the SNs;
the data after all SNs includes a data packet to which packet data of all PDCP PDUs is assigned a PDCP packet sequence number after the SNs.
12. The method of claim 10, wherein the terminal device performing data retransmission of PDCP PDUs according to the retransmission indication information comprises:
and the terminal equipment retransmits the K data packets with the sequence number of the PDCP PDU being after the SN.
13. A first network device, the device comprising:
a receiving module, configured to receive first configuration information of a second network device, where the first configuration information includes at least one of the following information: automatic repeat request ARQ feedback information of a first bearer, a node identifier of the first network equipment, an identifier of the first bearer, an identifier of terminal equipment, a logical channel identifier and an ARQ target node identifier;
a processing module, 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 a feedback indication; the feedback indication is used for indicating the first network device to perform ARQ feedback on the data of the first bearer or not to perform ARQ feedback on the data of the first bearer;
the processing module determining whether to perform ARQ feedback according to the first configuration information includes:
if the ARQ feedback information comprises end-to-end feedback, if the identifier of the first network equipment is the same as the identifier of the ARQ target node, sending ARQ feedback, if the identifier of the first network equipment is different from the identifier of the ARQ target node, not carrying out ARQ feedback, and forwarding the data of the first bearer;
if the ARQ feedback information comprises hop-by-hop feedback, transmitting ARQ feedback when receiving the data of the first bearer;
and if the ARQ feedback information comprises a feedback indication, determining whether to perform ARQ feedback on the data of the first bearer according to the feedback indication.
14. The apparatus of claim 13, wherein the ARQ feedback information for the first configuration information corresponds to one or more of the first bearers for the terminal device or to all bearers for the terminal device.
15. The apparatus of any one of claims 13-14, wherein the first configuration information further comprises a transmission direction indication, the transmission direction indication comprising an uplink transmission or a downlink transmission.
16. A second network device, the device comprising:
a processing module, configured to determine first configuration information, where the first configuration information includes at least one of: the method comprises the steps that automatic repeat request ARQ feedback information of a first bearer, a node identifier of first network equipment, an identifier of the first bearer, an identifier of terminal equipment, a logical channel identifier and an ARQ target node identifier are obtained;
a sending module, 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 a feedback indication; the feedback indication is used for indicating the first network device to perform ARQ feedback on the data of the first bearer or not to perform ARQ feedback on the data of the first bearer.
17. The apparatus of claim 16, wherein the first configuration information further comprises a transmission direction indication, the transmission direction indication comprising an uplink transmission or a downlink transmission.
18. A first network device, the device comprising:
a sending module, configured to send backhaul indication information to a third network device, where the backhaul indication information is used to notify the third network device to receive backhaul data, and the backhaul data is data that the first network device fails to send to a superior node and belongs to the third network device;
the sending module is further configured to send the backhaul data to the third network device;
the first network device is a superior node of the third network device.
19. The apparatus of claim 18, wherein the apparatus further comprises:
and the receiving module is used for receiving the feedback information sent by the third network equipment after the sending module sends the return indication information.
20. The apparatus of claim 19, wherein the apparatus further comprises:
and the processing module is used for stopping receiving the uplink data sent by the third network equipment after the receiving module receives the feedback information.
21. A terminal device, characterized in that the device comprises:
a receiving module, configured to receive third configuration information from a second network device, where the third configuration information includes retransmission indication information, the retransmission indication information is used to indicate the terminal device to perform data retransmission, and the retransmission indication information includes a SN of a packet data unit PDU of a packet data convergence protocol PDCP layer;
a processing module, configured to perform data retransmission of the PDCP PDU according to the retransmission indication information;
the processing module is specifically configured to:
retransmitting data after all SNs according to the SNs;
the data after all SNs includes a data packet to which packet data of all PDCP PDUs is assigned a PDCP packet sequence number after the SNs.
22. The apparatus of claim 21, wherein the retransmission indication information comprises a cause value, and/or a number of retransmission packets, K.
23. The device according to claim 22, wherein the processing module is specifically configured to:
and retransmitting K data packets with the sequence number of the PDCP PDU being after the SN.
24. A first network device, comprising a receiver, a processor, and a memory, the processor establishing communication with the receiver and the memory, respectively;
the receiver for performing the method of any one of claims 1-3;
the processor configured to perform the method of any one of claims 1-3.
25. A second network device, wherein the first network device comprises a transmitter and a memory, wherein the transmitter and the memory establish communication;
the transmitter for performing the method of any one of claims 4-5.
26. A first network device, wherein the first network device comprises a transmitter and a memory, wherein the transmitter and the memory establish communication;
the transmitter for performing the method of any one of claims 6-8.
27. A terminal device, characterized in that the terminal device comprises a receiver, a processor and a memory, the processor establishing communication with the receiver and the memory, respectively;
the receiver for performing the method of any one of claims 9-12;
the processor configured to perform the method of any one of claims 9-12.
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