WO2023201607A1 - 一种数据传输方法及装置、通信设备 - Google Patents

一种数据传输方法及装置、通信设备 Download PDF

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Publication number
WO2023201607A1
WO2023201607A1 PCT/CN2022/088094 CN2022088094W WO2023201607A1 WO 2023201607 A1 WO2023201607 A1 WO 2023201607A1 CN 2022088094 W CN2022088094 W CN 2022088094W WO 2023201607 A1 WO2023201607 A1 WO 2023201607A1
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pdu
information
data
sdap
pdcp
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PCT/CN2022/088094
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English (en)
French (fr)
Inventor
王淑坤
付喆
石聪
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/088094 priority Critical patent/WO2023201607A1/zh
Publication of WO2023201607A1 publication Critical patent/WO2023201607A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/06Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]

Definitions

  • the embodiments of the present application relate to the field of mobile communication technology, and specifically relate to a data transmission method and device, and communication equipment.
  • Packet Data Unit set (Packet Data Unit set, PDU set) consists of one or more Packet Data Units (Packet Data Unit set, PDU).
  • PDU Packet Data Unit
  • the wireless air interface can only identify one data packet (i.e., PDU) when processing the data to be transmitted. It cannot identify the association between PDUs, let alone PDU sets or frames. As a result, these correlations cannot be taken into account during the data transmission process, and the data transmission efficiency cannot be guaranteed.
  • Embodiments of the present application provide a data transmission method and device, communication equipment, chips, computer-readable storage media, computer program products, and computer programs.
  • the Packet Data Convergence Protocol (PDCP) layer receives the first SDAP PDU sent by the Service Data Adaptation Protocol (Service Data Adaptation Protocol, SDAP) layer, and the first SDAP PDU is the downlink SDAP control PDU, wherein the downlink SDAP control PDU includes at least one of the following information:
  • First information the first information is used to indicate whether the first SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the quality of service (Quality of Service, Qos) flow identifier associated with the first SDAP PDU;
  • the third information is used to indicate the control PDU type to which the first SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the first SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the first SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the first SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the first SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the first SDAP PDU.
  • the terminal device receives a second SDAP PDU sent by the network device.
  • the second SDAP PDU is a downlink SDAP data PDU, wherein the downlink SDAP data PDU having the first format includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • the third information is used to indicate the data PDU type to which the second SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the second SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the second SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the second SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the second SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the second SDAP PDU;
  • the ninth information is used to indicate the RDI corresponding to the second SDAP PDU;
  • Tenth information the tenth information is used to indicate the RQI corresponding to the second SDAP PDU;
  • the first node determines that the first data in a Group of Pictures (GOP) is lost, the first node discards the second data in the GOP; wherein the first data is the first frame
  • the second data is data corresponding to the second frame type or data corresponding to a non-first frame type.
  • the PDCP layer of the first node receives the data recovery indication sent by the second node, and the data recovery indication is used to trigger the PDCP layer of the first node to perform data recovery for part of the data.
  • the second node sends a data recovery indication to the first node, where the data recovery indication is used to trigger the PDCP layer of the first node to perform data recovery on part of the data.
  • the data transmission device has a PDCP layer and an SDAP layer;
  • the SDAP layer is used to send the first SDAP PDU to the PDCP layer;
  • the PDCP layer is used to receive the first SDAP PDU sent by the SDAP layer;
  • the first SDAP PDU is a downlink SDAP control PDU, wherein the downlink SDAP control PDU includes at least one of the following information:
  • First information the first information is used to indicate whether the first SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the first SDAP PDU;
  • the third information is used to indicate the control PDU type to which the first SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the first SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the first SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the first SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the first SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the first SDAP PDU.
  • the data transmission device provided by the embodiment of the present application is applied to terminal equipment, and the device includes:
  • a receiving unit configured to receive a second SDAP PDU sent by the network device, where the second SDAP PDU is a downlink SDAP data PDU, wherein the downlink SDAP data PDU having the first format includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • the third information is used to indicate the data PDU type to which the second SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the second SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the second SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the second SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the second SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the second SDAP PDU;
  • the ninth information is used to indicate the RDI corresponding to the second SDAP PDU;
  • Tenth information the tenth information is used to indicate the RQI corresponding to the second SDAP PDU;
  • the data transmission device provided by the embodiment of the present application is applied to the first node, and the device includes:
  • a determination unit used to determine whether the first data in the GOP is lost
  • a discarding unit configured to discard the second data in the GOP when it is determined that the first data in the GOP is lost; wherein the first data is data corresponding to the first frame type, and the second data is Data corresponding to the second frame type or data corresponding to a non-first frame type.
  • the data transmission device provided by the embodiment of the present application is applied to the first node, and the device includes:
  • a receiving unit configured to receive a data recovery indication sent by the second node, where the data recovery indication is used to trigger the PDCP layer of the first node to perform data recovery for part of the data.
  • the data transmission device provided by the embodiment of the present application is applied to the second node, and the device includes:
  • a sending unit configured to send a data recovery indication to the first node, where the data recovery indication is used to trigger the PDCP layer of the first node to perform data recovery on part of the data.
  • the communication device provided by the embodiment of the present application includes a processor and a memory.
  • the memory is used to store computer programs
  • the processor is used to call and run the computer programs stored in the memory and perform the above-mentioned data transmission method.
  • the chip provided by the embodiment of the present application is used to implement the above data transmission method.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the above-mentioned data transmission method.
  • the computer-readable storage medium provided by the embodiment of the present application is used to store a computer program.
  • the computer program causes the computer to execute the above-mentioned data transmission method.
  • the computer program product provided by the embodiment of the present application includes computer program instructions, which cause the computer to execute the above-mentioned data transmission method.
  • the computer program provided by the embodiment of the present application when run on a computer, causes the computer to perform the above data transmission method.
  • the downlink SDAP control PDU is introduced.
  • the PDCP layer can identify the association between PDUs and identify the association between PDU sets or frames, so that it can These associations are taken into account during the data transmission process to improve data transmission efficiency.
  • a new format of downlink SDAP data PDU is introduced.
  • the information carried in the new format of downlink SDAP data PDU can enable the PDCP layer to identify the association between PDUs and identify the association between PDU sets or frames, thus These associations can be taken into account during the data transmission process to improve data transmission efficiency.
  • the first node determines that the first data in the GOP is lost, it discards the second data in the GOP, thereby improving transmission efficiency and reducing unnecessary data transmission.
  • the PDCP layer uses different packet loss timers according to at least one of the frame type, Qos attribute and logical channel identifier (LCID), thereby improving data reliability.
  • the second node triggers data recovery, and the first node performs data recovery on part of the data, thereby improving the reliability of the part of the data.
  • Figure 1 is a schematic diagram of an application scenario
  • Figure 2 is a 5G network system architecture diagram
  • Figure 3 is a schematic diagram of a Qos mechanism
  • FIG. 4 is a schematic diagram of PDU set transmission provided by the embodiment of this application.
  • FIG. 5 is a schematic flowchart 1 of the data transmission method provided by the embodiment of the present application.
  • FIG. 6 is a schematic flowchart 2 of the data transmission method provided by the embodiment of the present application.
  • Figure 7-1 is a schematic diagram 1 of the format of the downlink SDAP control PDU provided by the embodiment of this application;
  • Figure 7-2 is a schematic diagram 2 of the format of the downlink SDAP control PDU provided by the embodiment of this application;
  • Figure 8-1 is a schematic diagram 1 of the format of the downlink SDAP data PDU provided by the embodiment of this application;
  • Figure 8-2 is a schematic diagram 2 of the format of the downlink SDAP data PDU provided by the embodiment of this application;
  • Figure 8-3 is a schematic diagram 3 of the format of the downlink SDAP data PDU provided by the embodiment of this application.
  • Figure 8-4 is a schematic diagram 4 of the format of the downlink SDAP data PDU provided by the embodiment of this application.
  • FIG. 9 is a schematic flowchart three of the data transmission method provided by the embodiment of the present application.
  • Figure 10-1 is a schematic diagram of the protocol stack of the first node provided by the embodiment of this application.
  • Figure 10-2 is a schematic diagram 2 of the protocol stack of the first node provided by the embodiment of this application.
  • FIG 11 is a schematic flowchart 4 of the data transmission method provided by the embodiment of the present application.
  • Figure 12 is a schematic structural diagram of a data transmission device provided by an embodiment of the present application.
  • Figure 13 is a schematic diagram 2 of the structure of the data transmission device provided by the embodiment of the present application.
  • Figure 14 is a schematic diagram 3 of the structure of the data transmission device provided by the embodiment of the present application.
  • Figure 15 is a schematic diagram 4 of the structure of the data transmission device provided by the embodiment of the present application.
  • Figure 16 is a schematic diagram 5 of the structure of the data transmission device provided by the embodiment of the present application.
  • Figure 17 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 18 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • Figure 19 is a schematic block diagram of a communication system provided by an embodiment of the present application.
  • Figure 1 is a schematic diagram of an application scenario according to the embodiment of the present application.
  • the communication system 100 may include a terminal device 110 and a network device 120 .
  • the network device 120 may communicate with the terminal device 110 through the air interface. Multi-service transmission is supported between the terminal device 110 and the network device 120.
  • LTE Long Term Evolution
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • IoT Internet of Things
  • NB-IoT Narrow Band Internet of Things
  • eMTC enhanced Machine-Type Communications
  • 5G communication system also known as New Radio (NR) communication system
  • NR New Radio
  • the network device 120 may be an access network device that communicates with the terminal device 110 .
  • the access network device may provide communication coverage for a specific geographical area and may communicate with terminal devices 110 (eg, UEs) located within the coverage area.
  • terminal devices 110 eg, UEs
  • the network device 120 may be an evolutionary base station (Evolutional Node B, eNB or eNodeB) in a Long Term Evolution (LTE) system, or a next generation radio access network (Next Generation Radio Access Network, NG RAN) equipment, It may be a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, access point, vehicle-mounted device, or wearable device. Equipment, hubs, switches, bridges, routers, or network equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN), etc.
  • Evolutional Node B, eNB or eNodeB in a Long Term Evolution (LTE) system
  • NG RAN Next Generation Radio Access Network
  • gNB base station
  • CRAN Cloud Radio Access Network
  • the terminal device 110 may be any terminal device, including but not limited to terminal devices that are wired or wirelessly connected to the network device 120 or other terminal devices.
  • the terminal device 110 may refer to an access terminal, user equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication Device, user agent, or user device.
  • Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, IoT devices, satellite handheld terminals, Wireless Local Loop (WLL) stations, Personal Digital Assistants (Personal Digital Assistant) , PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or terminal devices in future evolution networks, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistants
  • handheld devices with wireless communication functions computing devices or other processing devices connected to wireless modems
  • vehicle-mounted devices wearable devices
  • terminal devices in 5G networks or terminal devices in future evolution networks etc.
  • the terminal device 110 can be used for device to device (Device to Device, D2D) communication.
  • D2D Device to Device
  • the wireless communication system 100 may also include a core network device 130 that communicates with the base station.
  • the core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an access and mobility management function (Access and Mobility Management Function). , AMF), for example, Authentication Server Function (AUSF), for example, User Plane Function (UPF), for example, Session Management Function (Session Management Function, SMF).
  • AMF Access and Mobility Management Function
  • AUSF Authentication Server Function
  • UPF User Plane Function
  • Session Management Function Session Management Function
  • SMF Session Management Function
  • the core network device 130 may also be an Evolved Packet Core (EPC) device of the LTE network, for example, a session management function + core network data gateway (Session Management Function + Core Packet Gateway, SMF + PGW- C) Equipment.
  • EPC Evolved Packet Core
  • SMF+PGW-C can simultaneously realize the functions that SMF and PGW-C can realize.
  • the above-mentioned core network equipment may also be called by other names, or a new network entity may be formed by dividing the functions of the core network, which is not limited by the embodiments of this application.
  • Various functional units in the communication system 100 can also establish connections through next generation network (NG) interfaces to achieve communication.
  • NG next generation network
  • the terminal device establishes an air interface connection with the access network device through the NR interface for transmitting user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (referred to as N1); access Network equipment, such as the next generation wireless access base station (gNB), can establish user plane data connections with UPF through NG interface 3 (referred to as N3); access network equipment can establish control plane signaling with AMF through NG interface 2 (referred to as N2) connection; UPF can establish a control plane signaling connection with SMF through NG interface 4 (referred to as N4); UPF can exchange user plane data with the data network through NG interface 6 (referred to as N6); AMF can communicate with SMF through NG interface 11 (referred to as N11) SMF establishes a control plane signaling connection; SMF can establish a control plane signaling connection with PCF through NG interface 7 (referred to as N7).
  • N1 AMF through the NG interface 1
  • access Network equipment such as the next generation wireless
  • Figure 1 exemplarily shows a base station, a core network device and two terminal devices.
  • the wireless communication system 100 may include multiple base station devices and other numbers of terminals may be included within the coverage of each base station.
  • Equipment the embodiments of this application do not limit this.
  • FIG. 1 only illustrates the system to which the present application is applicable in the form of an example.
  • the method shown in the embodiment of the present application can also be applied to other systems.
  • system and “network” are often used interchangeably herein.
  • the term “and/or” in this article is just an association relationship that describes related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and they exist alone. B these three situations.
  • the character "/" in this article generally indicates that the related objects are an "or” relationship.
  • the "instruction” mentioned in the embodiments of this application may be a direct instruction, an indirect instruction, or an association relationship.
  • A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B. relation.
  • the "correspondence" mentioned in the embodiments of this application can mean that there is a direct correspondence or indirect correspondence between the two, it can also mean that there is an associated relationship between the two, or it can mean indicating and being instructed. , configuration and configured relationship.
  • predefined can refer to what is defined in the protocol.
  • protocol may refer to a standard protocol in the communication field, which may include, for example, LTE protocol, NR protocol, and related protocols applied in future communication systems. This application does not limit this. .
  • FIG. 2 is a 5G network system architecture diagram.
  • the network elements involved in the 5G network system include: User Equipment (User Equipment, UE), Radio Access Network (Radio Access Network, RAN), and user plane functions (User Plane Function, UPF), Data Network (DN), Access and Mobility Management Function (AMF), Session Management Function (Session Management Function, SMF), Policy Control Function (Policy Control Function (PCF), Application Function (AF), Authentication Server Function (AUSF), Unified Data Management (UDM).
  • UPF User Equipment
  • RAN Radio Access Network
  • UPF User Plane Function
  • DN Data Network
  • AMF Access and Mobility Management Function
  • Session Management Function Session Management Function
  • SMF Session Management Function
  • Policy Control Function Policy Control Function
  • PCF Policy Control Function
  • AF Application Function
  • AUSF Authentication Server Function
  • UDM Unified Data Management
  • the UE connects to the access layer (AS) with the RAN through the Uu interface, and exchanges access layer messages and wireless data transmission.
  • the UE performs a non-access stratum (NAS) connection with the AMF through the N1 interface and exchanges NAS messages.
  • AMF is the mobility management function in the core network
  • SMF is the session management function in the core network.
  • PCF is the policy management function in the core network and is responsible for formulating policies related to UE mobility management, session management, and charging.
  • UPF is the user plane function in the core network. It transmits data to the DN through the N6 interface and to the RAN through the N3 interface.
  • Qos Flow In a mobile communication network, in order to transmit user plane data, one or more Qos flows (Qos Flow) need to be established. As an important measure of communication quality, Qos parameters are usually used to indicate the characteristics of Qos flows. Different Qos flows correspond to different Qos parameters.
  • Qos parameters may include but are not limited to: 5G Quality of Service Identifier (5QI), Allocation Retension Priority (ARP), Guaranteed Flow Bit Rate (GFBR), Maximum Flow Bit Rate ( Maximum Flow Bit Rate, MFBR), up/downlink maximum packet loss rate (UL/DL Maximum Packet Loss Rate, UL/DL MPLR), end-to-end packet delay budget (Packet Delay Budget, PDB), AN-PDB, Packet Error Rate (PER), priority level (Priority Level), average window (Averaging Window), resource type (Resource Type), maximum data burst volume (Maximum Data Burst Volume), UE aggregate maximum bit rate ( UE Aggregate Maximum Bit Rate, UE-AMBR), session aggregate maximum bit rate (Session Aggregate Maximum Bit Rate, Session-AMBR), etc.
  • 5QI 5G Quality of Service Identifier
  • ARP Allocation Retension Priority
  • GFBR Guaranteed Flow Bit Rate
  • MFBR Maximum Flow Bit Rate
  • Filter contains characteristic parameters that describe data packets (such as some related parameters of IP data packets, some related parameters of Ethernet data packets), and is used to filter out specific data packets to bind to specific Qos flows.
  • the most commonly used Filter is the IP five-tuple, that is, source IP address, destination IP address, source port number, destination port number, and protocol type.
  • UPF and UE will form a filter based on the combination of characteristic parameters of the data packet (the leftmost trapezoid and the rightmost parallelogram in Figure 3 represent filters), and filter the matching data transmitted on the user plane through the filter.
  • the uplink Qos flow is bound by the UE, and the downlink Qos flow is bound by the UPF.
  • one or more Qos flows can be mapped to a data radio bearer (Data Resource Bearer, DRB) for transmission.
  • DRB Data Resource Bearer
  • the base station will establish a DRB based on the Qos parameters and bind the Qos flow to a specific DRB.
  • Qos flow is established triggered by SMF.
  • both the UE and the network side can trigger the PDU session modification process to change Qos.
  • the UE can modify the Qos parameters of the Qos flow or establish a new Qos flow by sending a PDU Session Modification Request (PDU Session Modification Request) message.
  • PDU Session Modification Request PDU Session Modification Request
  • CG Cloud Gaming
  • Extended Reality (EXtended Reality, XR): It is a large-scale umbrella for multiple heterogeneous use cases and services.
  • Mixed Reality, MR Mixed Reality
  • Extended Reality and media services The combination of XR and media services technology.
  • Video Slice A spatially distinct area in a video frame that is encoded separately from other areas in the same frame.
  • PDU Set consists of one or more PDUs. These PDUs carry an information unit generated at the application layer (for example, frames or video clips of XRM services). This information has the same importance requirements at the application layer. .
  • the application layer requires all PDUs in the PDU set to use the corresponding information unit. In some cases, when some PDUs are lost, the application layer can still recover some information units.
  • I-frame As an intra-frame encoded picture, it is a complete picture that can be independently encoded and decoded like a JPG image file.
  • P-frame As a predicted picture, it is not a complete frame and only contains image changes compared with the previous frame. If the reference frame is lost, the P frame cannot be decoded and displayed.
  • B-frame As a bidirectional prediction picture, it contains the changes between the previous reference frame and the next reference frame. The more reference frames, the higher the compression ratio. However, B-frames can only be decoded if the previous and next reference frames are available.
  • a Group of Pictures A collection of consecutive video frames.
  • the first frame of a GOP is an I frame, and subsequent frames can be P frames or B frames.
  • the PDU set is a group of PDUs. This group of PDUs represents a frame or a video clip. Each PDU in a PDU set is related to each other. Losing any PDU in a PDU set will cause the PDU set to be unable to be decoded successfully, resulting in the loss of part of the video image.
  • I frames, P frames, and B frames have different degrees of importance. For example, an I frame is associated with multiple P frames. If the I frame is lost, all P frames cannot be decoded. If the P frame is lost, the I frame and other P frames can be decoded. Recovery, so the I frame is very important and cannot be lost.
  • the wireless air interface can only identify one data packet (i.e., PDU) when processing the data to be transmitted. It cannot identify the association between PDUs, let alone PDU sets or frames. As a result, these correlations cannot be taken into account during data transmission.
  • Data packets (that is, PDUs) with associated relationships are carried on the same Qos flow or data bearer. In air interface data transmission and processing, data packets on the same Qos flow or data bearer have the same processing method. Different processing methods are adopted for different PDU sets. However, for PDU sets, PDUs in different PDU sets have different processing requirements. Using different processing methods for different PDUs (that is, data packets) can better improve multimedia services. performance and user experience.
  • a GOP For a GOP, it contains a group of frames, which may come from different Qos flows or from the same Qos flow.
  • Each frame in the GOP has its own type, such as I frame, B frame, P frame, etc.
  • the GOP can contain an I frame and at least one P frame and/or at least one B frame associated with it. .
  • a GOP identifier such as GOP id or GOP SN or GOP index, etc.
  • GOP identification is not limited to GOP id or GOP SN or GOP index, etc. It can also be in other forms, such as a certain time interval or a certain period, and each frame within a certain time interval or a certain period belongs to one GOP.
  • a PDU set For a frame, it is a PDU set, which is composed of multiple PDUs.
  • a PDU set identifier (such as PDU set id or PDU set SN or PDU set index, etc.) is defined for each PDU set, and a PDU set is identified by the PDU set identifier.
  • the PDU set identifier is unique within a GOP.
  • a PDU identifier (such as PDU id or PDU SN or PDU index, etc.) is defined for each PDU, and a PDU identifier is identified by the PDU identifier.
  • the PDU identifier is unique within the PDU set.
  • each PDU can be associated with at least one of the following information: GOP identification, PDU set identification, PDU identification, and frame type.
  • FIG 4 is a schematic diagram of PDU set transmission provided by the embodiment of this application.
  • the PDUs in a PDU set belong to a Qos flow, and the order between them is in sequence in the GPRS Tunnelling Protocol (GTP). ) is transmitted in the tunnel, that is, there will be no cross-transmission between PDU sets.
  • GTP GPRS Tunnelling Protocol
  • FIG. 5 is a schematic flowchart 1 of the data transmission method provided by the embodiment of the present application. As shown in Figure 5, the data transmission method includes the following steps:
  • Step 501 The Packet Data Convergence Protocol (PDCP) layer receives the first SDAP PDU sent by the Service Data Adaptation Protocol (SDAP) layer, where the first SDAP PDU is the downlink SDAP control PDU.
  • SDAP Service Data Adaptation Protocol
  • the PDCP layer and the SDAP layer are protocol layers of a communication device.
  • the communication device is a network device, such as a base station.
  • downlink SDAP control PDU for the downlink direction, downlink SDAP control PDU is introduced.
  • the downlink SDAP control PDU can be called the downlink SDAP end-marker (DL SDAP End-Marker).
  • DL SDAP End-Marker the downlink SDAP control PDU can also be called other names. This application does not specify the name of the downlink SDAP control PDU. limited.
  • the downlink SDAP control PDU is generated by the SDAP layer (or SDAP entity) according to the Qos flow level (per Qos flow) and terminated at the local PDCP layer.
  • the downlink SDAP control PDU is a downlink SDAP control PDU of a certain Qos flow.
  • the local PDCP layer After the SDAP layer transmits the downlink SDAP control PDU to the local PDCP layer, the local PDCP layer identifies at least one type based on the downlink SDAP control PDU. After receiving the information, discard the downlink SDAP control PDU.
  • the downlink SDAP control PDU is transmitted after one PDU set and/or before another PDU set, thereby dividing different PDU sets.
  • its associated PDU set may refer to the most recent PDU set before the downlink SDAP control PDU and/or the last most recent PDU set.
  • PDU set represents a frame. It should be understood that the description of "PDU set” in this application can be replaced by the “frame” it represents. Similarly, the description of "frame” in this application can be replaced by The corresponding "PDU set”.
  • the downlink SDAP control PDU has a specific format. Specifically, the downlink SDAP control PDU includes at least one of the following information:
  • First information the first information is used to indicate whether the first SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the first SDAP PDU;
  • the third information is used to indicate the control PDU type to which the first SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the first SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the first SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the first SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the first SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the first SDAP PDU, such as the identification of each PDU in the PDU set.
  • the Qos flow identifier associated with the first SDAP PDU may refer to: the identifier of the Qos flow to which the first SDAP PDU belongs, or the identifier of the PDU set or frame to which the first SDAP PDU is associated. .
  • the PDCP layer identifies at least one of the following information based on the downlink SDAP control PDU:
  • SDAP PDU or SDAP SDU with an associated relationship which refers to belonging to the same PDU set or frame;
  • the frame type of PDU set or frame is the frame type of PDU set or frame
  • PDU set or frame or Qos attribute of PDU
  • the identification of at least some of the PDUs in the PDU set such as the identification of each PDU in the PDU set.
  • the frame type may be, for example, an I frame, a P frame, a B frame, or other frame types.
  • Qos attributes include whether packet loss is allowed, packet loss rate, delay, etc.
  • the PDCP layer receives the second SDAP PDU sent by the SDAP layer, and the second SDAP PDU is a downlink SDAP data PDU.
  • a new format of downlink SDAP data PDU is introduced.
  • the new format of downlink SDAP data PDU is different from the old format of downlink SDAP data PDU.
  • the new format of downlink SDAP data PDU is called the first format of downlink SDAP data PDU.
  • the downlink SDAP data PDU in the old format is called the downlink SDAP data PDU in the second format.
  • the downlink SDAP data PDU is used to carry data information.
  • the data information can be the information of one PDU or the information of multiple cascaded PDUs.
  • the downlink SDAP data PDU can also carry other additional information. The following describes the downlink SDAP data PDU in the first format and the downlink SDAP data PDU in the second format.
  • the downlink SDAP data PDU in the first format includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • the third information is used to indicate the data PDU type to which the second SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the second SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the second SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the second SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the second SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the second SDAP PDU;
  • the ninth information is used to indicate the RDI corresponding to the second SDAP PDU;
  • Tenth information the tenth information is used to indicate the RQI corresponding to the second SDAP PDU;
  • the Qos flow identifier associated with the second SDAP PDU may refer to: the identifier of the Qos flow to which the second SDAP PDU belongs, or the identifier of the PDU set or frame to which the second SDAP PDU is associated. .
  • the frame type may be, for example, an I frame, a P frame, a B frame, or other frame types.
  • Qos attributes include whether packet loss is allowed, packet loss rate, delay, etc.
  • RDI refers to Reflective QoS flow to DRB mapping indication (Reflective QoS flow to DRB mapping Indication).
  • RQI refers to Reflective QoS Indication.
  • the downlink SDAP data PDU in the second format includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • the downlink SDAP data PDU in the first format and the downlink SDAP data PDU in the second format need to coexist.
  • the network device needs to determine which format of the downlink SDAP data PDU to use, that is, The network device determines whether the format of the downlink SDAP data PDU is the first format or the second format.
  • the network device may determine whether the format of the downlink SDAP data PDU is the first format or the second format in the following manner.
  • Method 1 If the network device receives the first capability information reported by the terminal device, the network device determines that the format of the downlink SDAP data PDU is the first format; if the network device does not receive the first capability information reported by the terminal device, first capability information, the network device determines that the format of the downlink SDAP data PDU is the second format; wherein the first capability information is used to indicate that the terminal device supports the downlink SDAP data PDU of the first format.
  • the application scope of the first format as the format of the downlink SDAP data PDU is the Qos flow corresponding to the target type service or all Qos flows of the terminal device .
  • the target type service is, for example, XR service.
  • the first capability information may be called enhanced SDAP capability indication information.
  • both the network device and the terminal device use the first format as the format of the downlink SDAP data PDU by default (the application scope is the Qos flow corresponding to the XR service or all Qos flows of the terminal device), otherwise, Use the second format as the format of the downlink SDAP data PDU.
  • Method 2 The network device receives the second capability information reported by the terminal device; if the second capability information indicates that the terminal device supports the first capability, the network device determines that the format of the downlink SDAP data PDU is the first capability. One format; if the second capability information indicates that the terminal device does not support the first capability, the network device determines that the format of the downlink SDAP data PDU is the second format; wherein the first capability refers to the terminal The ability of the device to support the downlink SDAP data PDU of the first format; or, the first capability refers to the ability of the terminal device to support the first protocol version.
  • the first protocol version is, for example, version 18 (Rel18) and version above.
  • the application scope of the first format as the format of the downlink SDAP data PDU is the Qos flow corresponding to the target type service or all Qos flows of the terminal device .
  • the target type service is, for example, XR service.
  • the first capability may be called a capability to enhance SDAP, or the first capability may be an enhanced protocol version capability.
  • the terminal device reports the second capability information, and the second capability information indicates the terminal device's ability to support the downlink SDAP data PDU of the first format or the ability to support Rel18, then both the network device and the terminal device use the first format as the default The format of the downlink SDAP data PDU (the application scope is the Qos flow corresponding to the XR service or all Qos flows of the terminal device), otherwise, use the second format as the format of the downlink SDAP data PDU.
  • Method 3 If the terminal device is configured with a target type service, the network device determines that the format of the downlink SDAP data PDU is the first format; if the terminal device is not configured with a target type service, the network device determines that the downlink SDAP The format of the data PDU is the second format.
  • the target type service is, for example, XR service.
  • the application scope of the first format as the format of the downlink SDAP data PDU is the Qos flow corresponding to the target type service or all Qos flows of the terminal device .
  • both the network device and the terminal device use the first format as the format of the downlink SDAP data PDU by default (the application scope is the Qos flow corresponding to the XR service or all Qos flows of the terminal device), otherwise , using the second format as the format of the downlink SDAP data PDU.
  • Method 4 The network device determines the format of the downlink SDAP data PDU itself, and notifies the terminal device of the determined format of the downlink SDAP data PDU.
  • the network device may configure an indication information to the terminal device through RRC signaling, and the indication information is used to instruct the terminal device which format to use as the format of the downlink SDAP data PDU.
  • the indication information may be configured at the Qos flow level (per Qos flow) or at the DRB level (per DRB) or at the PDU session level (per PDU session) or at the UE level (per UE).
  • the indication information may be a Boolean value or an enumeration value.
  • Table 1 below gives three optional ways to implement indication information.
  • the indication information is sDPA-Type, and its value is old or new, where old represents the second format and new represents the first format.
  • the indication information is newSDPA-Type, and its value is true or false, with true representing the first format and false representing the second format.
  • the indication information is newSDPA-Type, and its value is a Boolean value. Different Boolean values represent different formats.
  • the above-mentioned methods 1 to 4 can be implemented independently. Alternatively, the above-mentioned method 4 can be implemented in combination with the above-mentioned method 1, method 2 or method 3.
  • the priority of method 4 is higher than that of methods 1 to 3, that is, the terminal device first determines the downlink based on the instruction information of the network device.
  • the format of the SDAP data PDU When the network device does not have configuration indication information, determine the format of the downlink SDAP data PDU according to the above method one, two, or three.
  • FIG. 6 is a flow diagram 2 of the data transmission method provided by the embodiment of the present application. As shown in Figure 6, the data transmission method includes the following steps:
  • Step 601 The terminal device receives the second SDAP PDU sent by the network device, where the second SDAP PDU is a downlink SDAP data PDU.
  • the new format of downlink SDAP data PDU is different from the old format of downlink SDAP data PDU.
  • the new format of downlink SDAP data PDU is called the first format of downlink SDAP data PDU.
  • the downlink SDAP data PDU in the old format is called the downlink SDAP data PDU in the second format.
  • the downlink SDAP data PDU is used to carry data information.
  • the data information can be the information of one PDU or the information of multiple cascaded PDUs.
  • the downlink SDAP data PDU can also carry other additional information. The following describes the downlink SDAP data PDU in the first format and the downlink SDAP data PDU in the second format.
  • the downlink SDAP data PDU in the first format includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • the third information is used to indicate the data PDU type to which the second SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the second SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the second SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the second SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the second SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the second SDAP PDU;
  • the ninth information is used to indicate the RDI corresponding to the second SDAP PDU;
  • Tenth information the tenth information is used to indicate the RQI corresponding to the second SDAP PDU;
  • the Qos flow identifier associated with the second SDAP PDU may refer to: the identifier of the Qos flow to which the second SDAP PDU belongs, or the identifier of the PDU set or frame to which the second SDAP PDU is associated. .
  • the frame type may be, for example, an I frame, a P frame, a B frame, or other frame types.
  • Qos attributes include whether packet loss is allowed, packet loss rate, delay, etc.
  • RDI refers to Reflective QoS flow to DRB mapping indication (Reflective QoS flow to DRB mapping Indication).
  • RQI refers to Reflective QoS Indication.
  • the downlink SDAP data PDU in the second format includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • the downlink SDAP data PDU in the first format and the downlink SDAP data PDU in the second format need to coexist.
  • the terminal device needs to determine which format of the downlink SDAP data PDU to use, that is, The terminal device determines whether the format of the downlink SDAP data PDU is the first format or the second format.
  • the terminal device may determine whether the format of the downlink SDAP data PDU is the first format or the second format in the following manner.
  • Method 1 If the terminal device reports the first capability information to the network device, the terminal device and the network device determine that the format of the downlink SDAP data PDU is the first format; if the terminal device does not The network device reports the first capability information, then the terminal device and the network device determine that the format of the downlink SDAP data PDU is the second format; wherein the first capability information is used to indicate that the terminal device supports the Downlink SDAP data PDU in the first format.
  • the application range of the first format as the format of the downlink SDAP data PDU is the Qos corresponding to the target type of service. stream or all Qos streams of the terminal device.
  • the target type service is, for example, XR service.
  • the first capability information may be called enhanced SDAP capability indication information.
  • both the network device and the terminal device use the first format as the format of the downlink SDAP data PDU by default (the application scope is the Qos flow corresponding to the XR service or all Qos flows of the terminal device), otherwise, Use the second format as the format of the downlink SDAP data PDU.
  • Method 2 The terminal device reports the second capability information to the network device; if the second capability information indicates that the terminal device supports the first capability, the terminal device and the network device determine the downlink SDAP data PDU
  • the format is the first format; if the second capability information indicates that the terminal device does not support the first capability, the terminal device and the network device determine that the format of the downlink SDAP data PDU is the second format; wherein , the first capability refers to the capability of the terminal device to support the downlink SDAP data PDU of the first format; or, the first capability refers to the capability of the terminal device to support the first protocol version.
  • the application range of the first format as the format of the downlink SDAP data PDU is the Qos corresponding to the target type of service. stream or all Qos streams of the terminal device.
  • the target type service is, for example, XR service.
  • the first capability may be called a capability to enhance SDAP, or the first capability may be an enhanced protocol version capability.
  • the terminal device reports the second capability information, and the second capability information indicates the terminal device's ability to support the downlink SDAP data PDU of the first format or the ability to support Rel18, then both the network device and the terminal device use the first format as the default The format of the downlink SDAP data PDU (the application scope is the Qos flow corresponding to the XR service or all Qos flows of the terminal device), otherwise, use the second format as the format of the downlink SDAP data PDU.
  • Method 3 If the terminal device is configured with a target type service, the terminal device and the network device determine that the format of the downlink SDAP data PDU is the first format; if the terminal device is not configured with a target type service , then the terminal device and the network device determine that the format of the downlink SDAP data PDU is the second format.
  • the application range of the first format as the format of the downlink SDAP data PDU is the Qos corresponding to the target type of service. stream or all Qos streams of the terminal device.
  • the target type service is, for example, XR service.
  • both the network device and the terminal device use the first format as the format of the downlink SDAP data PDU by default (the application scope is the Qos flow corresponding to the XR service or all Qos flows of the terminal device), otherwise , using the second format as the format of the downlink SDAP data PDU.
  • Method 4 The terminal device receives the first indication information sent by the network device, and the first indication information is used to indicate whether the terminal device uses the first format or the second format as the format of the downlink SDAP data PDU. ; The terminal device determines the format of the downlink SDAP data PDU based on the first indication information.
  • the first indication information is Qos flow level configuration or DRB level configuration or PDU session level configuration or UE level configuration.
  • the first indication information is configured through RRC signaling.
  • the indication information may be a Boolean value or an enumeration value.
  • Table 1 in the foregoing solution gives three optional ways to implement indication information.
  • the indication information is sDPA-Type, and its value is old or new, where old represents the second format and new represents the first format.
  • the indication information is newSDPA-Type, and its value is true or false, with true representing the first format and false representing the second format.
  • the indication information is newSDPA-Type, and its value is a Boolean value. Different Boolean values represent different formats.
  • the format of the downlink SDAP control PDU can be but is not limited to the following format:
  • the downlink SDAP control PDU includes the following information: D/C (corresponding to the first information) and Qos Flow Identifier (QFI) (corresponding to the second information).
  • D/C is used to indicate whether the SDAP PDU is a data PDU or a control PDU
  • QFI is used to indicate the Qos flow identifier associated with the SDAP PDU.
  • D/C occupies 1 bit.
  • the value of 1 bit is 0, which is used to indicate that the SDAP PDU is a control PDU.
  • the downlink SDAP control PDU includes the following information: D/C (corresponding to the first information), QFI (corresponding to the second information), CPT (corresponding to the third information), frame type (corresponding to the third information) Four information), GOP identification (corresponding to the seventh information), PDU set identification (corresponding to the sixth information), PDU identification (corresponding to the eighth information) and Qos information (corresponding to the fifth information).
  • D/C information is used to indicate whether the SDAP PDU is a data PDU or a control PDU;
  • QFI is used to indicate the Qos flow identifier associated with the SDAP PDU;
  • CPT is used to indicate the control PDU type to which the SDAP PDU belongs;
  • the frame type is used to indicate the SDAP PDU association The frame type corresponding to the PDU set or frame;
  • the GOP identifier is used to indicate the identifier of the PDU set or frame to which the SDAP PDU is associated;
  • the PDU set identifier is used to indicate the identifier of the PDU set or frame associated with the SDAP PDU;
  • the PDU identifier is used to Indicates the identification of at least part of the PDU in the PDU set associated with the SDAP PDU;
  • Qos information is used to indicate the Qos attributes of the PDU set or frame or PDU associated with the SDAP PDU.
  • D/C occupies 1 bit.
  • the value of 1 bit is 0,
  • the downlink SDAP data PDU in the first format may be but is not limited to the following format:
  • the downlink SDAP data PDU includes the following information: D/C (corresponding to the first information), QFI (corresponding to the second information), CPT (corresponding to the third information), RDI (corresponding to the ninth information) information), RQI (corresponding to the tenth information) and data information.
  • D/C is used to indicate whether the SDAP PDU is a data PDU or a control PDU
  • QFI is used to indicate the Qos flow identifier associated with the SDAP PDU
  • CPT is used to indicate the control PDU type to which the SDAP PDU belongs.
  • the downlink SDAP data PDU includes the following information: D/C (corresponding to the first information), QFI (corresponding to the second information), RDI (corresponding to the ninth information), RQI (corresponding to the tenth information) information) and data information.
  • D/C is used to indicate whether the SDAP PDU is a data PDU or a control PDU
  • QFI is used to indicate the Qos flow identifier associated with the SDAP PDU.
  • the downlink SDAP data PDU includes the following information: D/C (corresponding to the first information), QFI (corresponding to the second information), CPT (corresponding to the third information), frame type (corresponding to the third information) Four information), GOP identification (corresponding to the seventh information), PDU set identification (corresponding to the sixth information), PDU identification (corresponding to the eighth information) and Qos information (corresponding to the fifth information), RDI, RQI and data information.
  • D/C information is used to indicate whether the SDAP PDU is a data PDU or a control PDU;
  • QFI is used to indicate the Qos flow identifier associated with the SDAP PDU;
  • CPT is used to indicate the control PDU type to which the SDAP PDU belongs;
  • the frame type is used to indicate the SDAP PDU association The frame type corresponding to the PDU set or frame;
  • the GOP identifier is used to indicate the identifier of the PDU set or frame to which the SDAP PDU is associated;
  • the PDU set identifier is used to indicate the identifier of the PDU set or frame associated with the SDAP PDU;
  • the PDU identifier is used to Indicates the identification of at least part of the PDU in the PDU set associated with the SDAP PDU;
  • Qos information is used to indicate the Qos attributes of the PDU set or frame or PDU associated with the SDAP PDU.
  • the downlink SDAP data PDU includes the following information: D/C (corresponding to the first information), QFI (corresponding to the second information), frame type (corresponding to the fourth information), GOP identification (corresponding to The seventh information), PDU set identification (corresponding to the sixth information), PDU identification (corresponding to the eighth information) and Qos information (corresponding to the fifth information), RDI, RQI and data information.
  • the D/C information is used to indicate whether the SDAP PDU is a data PDU or a control PDU;
  • QFI is used to indicate the Qos flow identifier associated with the SDAP PDU;
  • the frame type is used to indicate the PDU set associated with the SDAP PDU or the frame type corresponding to the frame;
  • the GOP identifier It is used to indicate the ID of the GOP to which the PDU set or frame associated with the SDAP PDU belongs;
  • the PDU set ID is used to indicate the ID of the PDU set or frame associated with the SDAP PDU;
  • the PDU ID is used to indicate the ID of at least part of the PDU in the PDU set associated with the SDAP PDU.
  • Identification Qos information is used to indicate the Qos attributes of the PDU set or frame or PDU associated with the SDAP PDU.
  • the technical solution of the embodiment of this application introduces the downlink SDAP control PDU.
  • the PDCP layer can realize the association between PDUs and identify the association between PDU sets or frames. , so that these associations can be taken into account during the data transmission process to improve data transmission efficiency.
  • a new format of downlink SDAP data PDU is introduced.
  • the information carried in the new format of downlink SDAP data PDU can enable the PDCP layer to identify the association between PDUs and identify the association between PDU sets or frames, thus These associations can be taken into account during the data transmission process to improve data transmission efficiency.
  • FIG 9 is a schematic flowchart three of the data transmission method provided by the embodiment of the present application. As shown in Figure 9, the data transmission method includes the following steps:
  • Step 901 When the first node determines that the first data in the GOP is lost, the first node discards the second data in the GOP; wherein the first data is data corresponding to the first frame type, so The second data is data corresponding to the second frame type or data corresponding to a non-first frame type.
  • the first node is a sending end, and the sending end can send data to the receiving end.
  • the first node may be a network device (such as a base station), or the first node may be a terminal device.
  • the first node when the first node determines that the first data in the GOP is lost, the first node discards the second data in the GOP; wherein the first data is corresponding to the first frame type.
  • the second data is data corresponding to the second frame type or data corresponding to a non-first frame type.
  • the first frame type is, for example, an I frame
  • the second frame type or non-first frame type is, for example, a B frame and/or a P frame.
  • a piece of data can correspond to a PDU or a PDCP PDU or a PDCP SDU or an RLC PDU or an RLC SDU in the PDU set.
  • the number of first data may be one or more, and the number of second data may be one or more.
  • each data corresponds to a PDCP SN.
  • the PDCP SN corresponding to the first data includes one or more PDCP SNs.
  • the PDCP SN corresponding to the second data includes one or more PDCP SNs.
  • the first node has one PDCP entity and two RLC entities, the two RLC entities include a first RLC entity and a second RLC entity, and the PDCP entity is used to transmit the first RLC entity.
  • the first RLC entity is used to transmit the first data
  • the second RLC entity is used to transmit the second data.
  • the first RLC entity determines that the first data in the GOP is lost, it notifies the second RLC entity to discard the second data in the GOP.
  • the first RLC entity notifies the PDCP entity, and the PDCP entity notifies the second RLC entity; or,
  • the first RLC entity notifies the second RLC entity.
  • the notification carries at least one of the following information:
  • the second indication information is used to indicate the first data loss in the GOP
  • the GOP identifier is the identifier of the GOP that lost the first data
  • the PDCP SN list is used to indicate the PDCP SN corresponding to the discarded one or more second data
  • the starting PDCP SN is used to indicate the PDCP SN corresponding to the discarded starting second data
  • Terminating PDCP SN the terminating PDCP SN is used to indicate the PDCP SN corresponding to the discarded terminating second data
  • the PDCP SN length is used to indicate the number of PDCP SNs corresponding to the discarded one or more second data.
  • the termination PDCP SN may not be carried in the notification, and the termination PDCP SN may default to the PDCP SN corresponding to the last data submitted by the PDCP entity to the second RLC entity.
  • the first node has two PDCP entities and two RLC entities
  • the two PDCP entities include a first PDCP entity and a second PDCP entity
  • the two RLC entities include a first RLC entity and a second RLC entity.
  • the first PDCP entity and the first RLC entity are used to transmit the first data.
  • the second PDCP entity and the second RLC entity are used to transmit the second data. data.
  • the first RLC entity determines that the first data in the GOP is lost, it notifies at least one of the SDAP layer, the second PDCP entity, and the second RLC entity to discard the second data in the GOP.
  • the first RLC entity notifies the first PDCP entity, the first PDCP entity notifies the SDAP layer, the SDAP layer notifies the second PDCP entity, and the second PDCP entity notifies the third Two RLC entities; or,
  • the first RLC entity notifies the first PDCP entity, the first PDCP entity notifies the second PDCP entity, and the second PDCP entity notifies the second RLC entity; or,
  • the first RLC entity notifies the second RLC entity, the second RLC entity notifies the second PDCP entity, and the second PDCP entity notifies the SDAP layer; or,
  • the first RLC entity notifies the second RLC entity, and the second RLC entity notifies the second PDCP entity; or,
  • the first RLC entity notifies the second RLC entity.
  • the notification carries at least one of the following information:
  • the second indication information is used to indicate the first data loss in the GOP
  • the GOP identifier is the identifier of the GOP that lost the first data
  • the PDCP SN list is used to indicate the PDCP SN corresponding to the discarded one or more second data
  • the starting PDCP SN is used to indicate the PDCP SN corresponding to the discarded starting second data
  • Terminating PDCP SN the terminating PDCP SN is used to indicate the PDCP SN corresponding to the discarded terminating second data
  • the PDCP SN length is used to indicate the number of PDCP SNs corresponding to the discarded one or more second data.
  • the termination PDCP SN may not be carried in the notification, and the termination PDCP SN may default to the PDCP SN corresponding to the last data submitted by the PDCP entity to the second RLC entity.
  • the first RLC entity can determine whether the first data in the GOP is lost in the following manner.
  • Method A The first RLC entity determines whether the first data in the GOP is lost based on the indication of the MAC layer.
  • the MAC layer is configured with the following function through RRC signaling: after the MAC layer transmits the data and obtains the ACK/NACK feedback information for the data, it indicates the RLC layer based on the ACK/NACK feedback information. Whether the data is transmitted correctly.
  • the configured functions of the MAC layer are configured according to the LCID level. For example, after transmitting the data and obtaining the ACK/NACK feedback information, the MAC layer indicates whether the data is correct to the RLC entity corresponding to the LCID to which the data belongs. transmission (that is, whether the data is lost).
  • Method B The first RLC entity determines whether the first data in the GOP is lost based on the ACK/NACK feedback of the RLC entity of the second node, and the second node is the receiving end of the first data.
  • the protocol stack of the first node is shown in Figure 10-1. It has one PDCP entity and two RLC entities.
  • the two RLC entities include an RLC1 entity (corresponding to the first RLC entity) and an RLC2 entity (corresponding to the second RLC entity).
  • the PDCP entity is used to transmit I frame data
  • the RLC1 entity is used to transmit I frame data
  • the RLC2 entity is used to transmit B frame and/or P frame data.
  • the mode of the RLC1 entity may be an acknowledged (AM) mode or an unacknowledged (UM) mode
  • the mode of the RLC entity may be a UM mode or an AM mode.
  • the RLC1 entity determines that the I frame data is lost, the RLC1 entity notifies the PDCP layer that the I frame data is lost and the GOP identifier corresponding to the lost I frame data, and the PDCP layer notifies the RLC2 entity to discard the B frame and/or corresponding to the GOP identifier.
  • P frame data can carry at least one of the following information in the notification to the RLC2 entity: PDCP SN list, starting PDCP SN, terminating PDCP SN, PDCP SN length, and GOP identification.
  • the termination PDCP SN can default to the PDCP SN corresponding to the last data submitted by the PDCP entity to the RLC2 entity.
  • the RLC1 entity determines that the I frame data is lost, the RLC1 entity notifies the RLC2 entity to discard the B frame and/or P frame data corresponding to the GOP identifier.
  • the RLC1 entity can carry at least one of the following information in the notification to the RLC2 entity: PDCP SN list, starting PDCP SN, terminating PDCP SN, PDCP SN length, and GOP identification.
  • the termination PDCP SN can default to the PDCP SN corresponding to the last data submitted by the PDCP entity to the RLC2 entity.
  • B frames and P frames can share one RLC entity, or B frames can use one RLC entity and P frames can use another RLC entity, that is to say,
  • the protocol stack shown in Figure 10-1 includes three RLC entities.
  • the protocol stack of the first node is shown in Figure 10-2. It has two PDCP entities and two RLC entities.
  • the two PDCP entities include PDCP entity 1 (corresponding to the first PDCP entity) and PDCP entity 2 (corresponding to the second PDCP entity).
  • PDCP entity) the two RLC entities include RLC1 entity (corresponding to the first RLC entity) and RLC2 entity (corresponding to the second RLC entity).
  • the PDCP1 entity and RLC2 entity are used to transmit I frame data
  • the PDCP2 entity and RLC2 entity are used to transmit I frame data. Transmit B-frame and/or P-frame data.
  • the mode of the RLC1 entity may be an acknowledged (AM) mode or an unacknowledged (UM) mode
  • the mode of the RLC entity may be a UM mode or an AM mode.
  • the RLC1 entity determines that the I frame data is lost, the RLC1 entity notifies the PDCP1 entity of the I frame data loss and the GOP identifier corresponding to the lost I frame data, and the PDCP1 entity notifies the SDAP layer of the I frame data loss and the lost I frame data.
  • the SDAP layer notifies the PDCP2 entity that the I frame data is lost and the GOP identifier corresponding to the lost I frame data; the PDCP2 entity discards the B frame corresponding to the GOP identifier.
  • the PDCP2 entity notifies the RLC2 entity of I frame data loss and the GOP identifier corresponding to the lost I frame data; the RLC2 entity discards the B frame and/or P frame data corresponding to the GOP identifier.
  • the PDCP2 entity can carry at least one of the following information in the notification to the RLC2 entity: PDCP SN list, starting PDCP SN, terminating PDCP SN, PDCP SN length, and GOP identification.
  • the termination PDCP SN can default to the PDCP SN corresponding to the last data submitted by the PDCP entity to the RLC2 entity.
  • the RLC1 entity determines that the I frame data is lost, the RLC1 entity notifies the PDCP1 entity of the I frame data loss and the GOP identifier corresponding to the lost I frame data, and the PDCP1 entity notifies the PDCP2 entity of the I frame data loss and the lost I frame data.
  • the PDCP2 entity notifies the RLC2 entity that the I frame data is lost and the GOP identifier corresponding to the lost I frame data; the RLC2 entity discards the B frame corresponding to the GOP identifier. and/or P frame data.
  • the PDCP2 entity can carry at least one of the following information in the notification to the RLC2 entity: PDCP SN list, starting PDCP SN, terminating PDCP SN, PDCP SN length, and GOP identification.
  • the termination PDCP SN can default to the PDCP SN corresponding to the last data submitted by the PDCP entity to the RLC2 entity.
  • the RLC1 entity determines that the I frame data is lost, the RLC1 entity notifies the RLC2 entity that the I frame data is lost and the GOP identifier corresponding to the lost I frame data; the RLC2 entity discards the B frame and/or P frame data corresponding to the GOP identifier.
  • the RLC1 entity can carry at least one of the following information in the notification to the RLC2 entity: PDCP SN list, starting PDCP SN, terminating PDCP SN, PDCP SN length, and GOP identification.
  • the termination PDCP SN can default to the PDCP SN corresponding to the last data submitted by the PDCP entity to the RLC2 entity.
  • B frames and P frames can share one RLC entity, or B frames can use one RLC entity and P frames can use another RLC entity, that is to say,
  • the protocol stack shown in Figure 10-1 includes three RLC entities.
  • the PDCP layer of the first node is configured with at least one packet discard timer (discard timer), and each packet discard timer in the at least one packet discard timer is associated with at least one of the following: 1: Frame type, Qos attributes, LCID.
  • the PDCP layer determines the packet loss timer corresponding to the data based on at least one of the frame type, Qos attribute and LCID of the received data, and starts the packet loss corresponding to the data after receiving the data. timer.
  • the network side configures a dedicated bearer (that is, a dedicated DRB) through RRC dedicated signaling.
  • the DRB includes a PDCP entity and at least one RLC entity.
  • at least one packet loss timer is configured, that is, the PDCP layer packet loss timer.
  • Each packet loss timer is associated with a frame type and/or a Qos attribute and/or LCID. For example: configure two packet loss timers, one packet loss timer (longer duration) is associated with I frames, and the other packet loss timer (shorter duration) is associated with B frames and/or P frames.
  • the PDCP layer determines the packet loss timer corresponding to the data based on at least one of the frame type, Qos attribute and LCID of the received data, and starts the packet loss timer corresponding to the data after receiving the data. .
  • the first node determines that the first data in the GOP is lost, it discards the second data in the GOP, thereby improving transmission efficiency and reducing unnecessary data transmission.
  • the PDCP layer uses different packet loss timers according to at least one of the frame type, Qos attribute and logical channel identifier (LCID), thereby improving data reliability.
  • FIG 11 is a schematic flow chart 4 of a data transmission method provided by an embodiment of the present application. As shown in Figure 11, the data transmission method includes the following steps:
  • Step 1101 The second node sends a data recovery indication to the first node, and the PDCP layer of the first node receives the data recovery indication sent by the second node.
  • the data recovery indication is used to trigger the PDCP layer of the first node to recover some data. Perform data recovery.
  • the first node is the sending end
  • the second node is the receiving end
  • the sending end can send data to the receiving end.
  • the first node may be a network device (such as a base station)
  • the second node may be a terminal device.
  • the first node may be a terminal device
  • the second node may be a network device (such as a base station).
  • the first node may be a first terminal device
  • the second node may be a second terminal device.
  • the receiving end can trigger partial data recovery.
  • the receiving end sends a data recovery indication to the sending end, and the data recovery indication is used to trigger the PDCP layer of the sending end to perform data recovery on part of the data.
  • part of the data may refer to data of a specific frame type (such as I frame data) or data of a specific Qos attribute or data of a specific LCID.
  • the receiving end can trigger the PDCP entity of the sending end to perform data recovery for the frame data.
  • the data recovery indication is carried in MAC CE or DCI.
  • the data recovery indication includes at least one of the following information associated with the partial data: DRB identifier, GOP identifier list, PDU set identifier list, and frame type.
  • the triggering conditions for sending the data recovery indication include at least one of the following:
  • RLC release and addition are performed based on RRC configuration
  • the RLC entity performed RLC reconstruction
  • the bearer type was changed based on RRC configuration
  • the PDCP layer of the second node determines that the trigger condition is met (eg, determines that the I frame data is lost).
  • intra-CU handover can be understood as the centralized unit (Centralized Unit, CU) of the serving cell remains unchanged before and after the handover, while the distributed unit (Distributed Unit, DU) changes.
  • the PDCP layer of the second node determines that the trigger condition is met, which can be implemented in the following ways:
  • Method a The PDCP layer of the second node starts the first timer after sending the data recovery indication, and sets the most recently received PDCP SN as the first recovery PDCP SN; when the first timer times out, if If there is a PDCP SN in the first PDCP SN range that has not been received by the PDCP layer of the second node, the PDCP layer of the second node determines that the trigger condition is met; wherein the first PDCP SN range includes the The first recovery PDCP SN and the PDCP SN before the first recovery PDCP SN; or the first PDCP SN range includes the PDCP SN between the first recovery PDCP SN and the second recovery PDCP SN, and the first recovery PDCP SN is The second recovery PDCP SN is the corresponding recovery PDCP SN when the first timer was last started.
  • Method b If there is a PDCP SN that has not been received by the PDCP layer of the second node, the PDCP layer of the second node starts a second timer; when the second timer times out, if there is still a PDCP SN that has not been received by the PDCP layer of the second node, When the PDCP SN of the second node is received, the PDCP layer of the second node determines that the trigger condition is satisfied.
  • Method c If there is a PDCP SN that has not been received by the PDCP layer of the second node, the PDCP layer of the second node determines that the trigger condition is met.
  • Method d If there is a PDCP SN that has not been received by the PDCP layer of the second node and the data corresponding to the PDCP SN that has not been received belongs to the data corresponding to the first frame type, then the PDCP layer of the second node determines The trigger condition is met.
  • the first frame type may be an I frame.
  • the PDCP SN is the SN corresponding to the PDCP layer.
  • Each data has a PDCP SN.
  • the PDCP layer receiving a PDCP SN can be understood as the PDCP layer receiving a data with a PDCP SN.
  • the PDCP layer of the first node after the PDCP layer of the first node receives the data recovery indication sent by the second node, the PDCP layer of the first node resends the first data within the first window, and the first The data is the data corresponding to the first frame type.
  • the first frame type may be an I frame.
  • the termination SN of the first window is the PDCP SN of the latest PDCP PDU submitted by the PDCP layer of the first node to the RLC layer, and the length of the first window is configured through RRC signaling.
  • the length of the first window is configured at the UE level or at the PDCP level or at the DRB level.
  • the length of the first window is expressed by the number of PDCP SNs or by time or by the number of time domain units.
  • the time may be, for example, N seconds or milliseconds.
  • the time domain unit may be, for example, a radio frame, a time slot, a symbol, or the like.
  • the length of the time slot is the time slot length corresponding to the reference subcarrier spacing (SCS)
  • the reference SCS is the SCS configured by RRC signaling or the data recovery Indicates the SCS where BWP is activated.
  • the second node triggers data recovery, and the first node performs data recovery on part of the data, thereby improving the reliability of the part of the data.
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its functions and internal logic, and should not be used in this application.
  • the implementation of the examples does not constitute any limitations.
  • the terms “downlink”, “uplink” and “sidelink” are used to indicate the transmission direction of signals or data, where “downlink” is used to indicate that the transmission direction of signals or data is from the station.
  • uplink is used to indicate that the transmission direction of the signal or data is the second direction from the user equipment of the cell to the site
  • sidelink is used to indicate that the transmission direction of the signal or data is A third direction sent from User Device 1 to User Device 2.
  • downlink signal indicates that the transmission direction of the signal is the first direction.
  • the term “and/or” is only an association relationship describing associated objects, indicating that three relationships can exist. Specifically, A and/or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.
  • Figure 12 is a schematic structural diagram of a data transmission device provided by an embodiment of the present application. As shown in Figure 12, the device has a PDCP layer 1201 and an SDAP layer 1202; wherein,
  • the SDAP layer 1202 is used to send the first SDAP PDU to the PDCP layer 1201;
  • the PDCP layer 1201 is used to receive the first SDAP PDU sent by the SDAP layer 1202; the first SDAP PDU is a downlink SDAP control PDU, wherein the downlink SDAP control PDU includes at least one of the following information:
  • First information the first information is used to indicate whether the first SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the first SDAP PDU;
  • the third information is used to indicate the control PDU type to which the first SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the first SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the first SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the first SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the first SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the first SDAP PDU.
  • the PDCP layer 1201 is also configured to identify at least one of the following information based on the downlink SDAP control PDU:
  • SDAP PDU or SDAP service data unit SDU with an associated relationship where the associated relationship refers to belonging to the same PDU set or frame;
  • PDU set or frame or Qos attribute of PDU
  • the PDCP layer 1201 is further configured to discard the downlink SDAP control PDU after identifying at least one piece of information based on the downlink SDAP control PDU.
  • the PDCP layer 1201 is also configured to receive a second SDAP PDU sent by the SDAP layer 1202.
  • the second SDAP PDU is a downlink SDAP data PDU, wherein the downlink data PDU has the first format.
  • SDAP data PDU includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • the third information is used to indicate the data PDU type to which the second SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the second SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the second SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the second SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the second SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the second SDAP PDU;
  • the ninth information is used to indicate the RDI corresponding to the second SDAP PDU;
  • Tenth information the tenth information is used to indicate the RQI corresponding to the second SDAP PDU;
  • the PDCP layer 1201 and the SDAP layer 1202 are protocol layers of a network device; the network device is used to determine whether the format of the downlink SDAP data PDU is the first format or the second format. .
  • the network device is configured to determine that the format of the downlink SDAP data PDU is the first format if the network device receives the first capability information reported by the terminal device; if the network device If the device does not receive the first capability information reported by the terminal device, it determines that the format of the downlink SDAP data PDU is the second format; wherein the first capability information is used to indicate that the terminal device supports the downlink SDAP of the first format. Data PDU.
  • the network device is configured to receive the second capability information reported by the terminal device; if the second capability information indicates that the terminal device supports the first capability, determine the format of the downlink SDAP data PDU. is the first format; if the second capability information indicates that the terminal device does not support the first capability, determine that the format of the downlink SDAP data PDU is the second format; wherein the first capability refers to the terminal The ability of the device to support the downlink SDAP data PDU of the first format; or, the first capability refers to the ability of the terminal device to support the first protocol version.
  • the network device is configured to determine that the format of the downlink SDAP data PDU is the first format if the terminal device is configured with a target type service; if the terminal device is not configured with a target type service, Then it is determined that the format of the downlink SDAP data PDU is the second format.
  • the network device determines that the format of the downlink SDAP data PDU is the first format
  • the application scope of the first format as the format of the downlink SDAP data PDU is corresponding to the target type of service. Qos flow or all Qos flows of the terminal device.
  • the downlink SDAP data PDU in the second format includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • Figure 13 is a schematic diagram 2 of the structure of a data transmission device provided by an embodiment of the present application. It is applied to terminal equipment. As shown in Figure 13, the data transmission device includes:
  • the receiving unit 1301 is configured to receive a second SDAP PDU sent by the network device, where the second SDAP PDU is a downlink SDAP data PDU, wherein the downlink SDAP data PDU having the first format includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • the third information is used to indicate the data PDU type to which the second SDAP PDU belongs;
  • the fourth information is used to indicate the PDU set associated with the second SDAP PDU or the frame type corresponding to the frame;
  • the fifth information is used to indicate the Qos attribute of the PDU set or frame or PDU associated with the second SDAP PDU;
  • the sixth information is used to indicate the identifier of the PDU set or frame associated with the second SDAP PDU;
  • the seventh information is used to indicate the PDU set associated with the second SDAP PDU or the identifier of the GOP to which the frame belongs;
  • the eighth information is used to indicate the identification of at least some PDUs in the PDU set associated with the second SDAP PDU;
  • the ninth information is used to indicate the RDI corresponding to the second SDAP PDU;
  • Tenth information the tenth information is used to indicate the RQI corresponding to the second SDAP PDU;
  • the receiving unit 1301 is also configured to receive first indication information sent by the network device, where the first indication information is used to indicate whether the terminal device uses the first format or the The second format is used as the format of the downlink SDAP data PDU;
  • the device further includes: a determining unit 1302, configured to determine the format of the downlink SDAP data PDU based on the first indication information.
  • the first indication information is Qos flow level configuration or DRB level configuration or PDU session level configuration or UE level configuration.
  • the first indication information is configured through RRC signaling.
  • the apparatus further includes: a determining unit 1302, configured to determine that the format of the downlink SDAP data PDU is the first format if the terminal device reports the first capability information to the network device. ; If the terminal device does not report the first capability information to the network device, determine that the format of the downlink SDAP data PDU is the second format; wherein the first capability information is used to indicate that the terminal device supports the third A format of downstream SDAP data PDU.
  • a determining unit 1302 configured to determine that the format of the downlink SDAP data PDU is the first format if the terminal device reports the first capability information to the network device. ; If the terminal device does not report the first capability information to the network device, determine that the format of the downlink SDAP data PDU is the second format; wherein the first capability information is used to indicate that the terminal device supports the third A format of downstream SDAP data PDU.
  • the apparatus further includes: a reporting unit configured to report second capability information to the network device;
  • Determining unit 1302 configured to determine that the format of the downlink SDAP data PDU is the first format if the second capability information indicates that the terminal device supports the first capability; if the second capability information indicates that the terminal device supports If the first capability is not supported, it is determined that the format of the downlink SDAP data PDU is the second format; wherein the first capability refers to the ability of the terminal device to support the downlink SDAP data PDU of the first format; or, The first capability refers to the ability of the terminal device to support the first protocol version.
  • the device further includes: a determining unit 1302, configured to determine that the format of the downlink SDAP data PDU is the first format if the terminal device is configured with a target type service; if the If the terminal device is not configured with the target type service, it is determined that the format of the downlink SDAP data PDU is the second format.
  • a determining unit 1302 configured to determine that the format of the downlink SDAP data PDU is the first format if the terminal device is configured with a target type service; if the If the terminal device is not configured with the target type service, it is determined that the format of the downlink SDAP data PDU is the second format.
  • the determining unit 1302 determines that the format of the downlink SDAP data PDU is the first format
  • the application scope of the first format as the format of the downlink SDAP data PDU is corresponding to the target type of service. Qos flow or all Qos flows of the terminal device.
  • the downlink SDAP data PDU in the second format includes at least one of the following information:
  • First information the first information is used to indicate whether the second SDAP PDU is a data PDU or a control PDU;
  • the second information is used to indicate the Qos flow identifier associated with the second SDAP PDU;
  • Figure 14 is a schematic diagram 3 of the structure of a data transmission device provided by an embodiment of the present application. It is applied to the first node. As shown in Figure 14, the data transmission device includes:
  • the discarding unit 1402 is configured to discard the second data in the GOP when it is determined that the first data in the GOP is lost; wherein the first data is data corresponding to the first frame type, and the second data It is the data corresponding to the second frame type or the data corresponding to the non-first frame type.
  • the first node has one PDCP entity and two RLC entities, the two RLC entities include a first RLC entity and a second RLC entity, and the PDCP entity is used to transmit the first RLC entity.
  • the first RLC entity is used to transmit the first data
  • the second RLC entity is used to transmit the second data.
  • the discarding unit 1402 when the determining unit 1401 determines through the first RLC entity that the first data in the GOP is lost, the discarding unit 1402 notifies the second RLC entity to discard the data in the GOP. Second data.
  • the path sequence of the notifications is:
  • the first RLC entity notifies the PDCP entity, and the PDCP entity notifies the second RLC entity; or,
  • the first RLC entity notifies the second RLC entity.
  • the first node has two PDCP entities and two RLC entities
  • the two PDCP entities include a first PDCP entity and a second PDCP entity
  • the two RLC entities include a first RLC entity and a second RLC entity.
  • the first PDCP entity and the first RLC entity are used to transmit the first data.
  • the second PDCP entity and the second RLC entity are used to transmit the second data. data.
  • the discarding unit 1402 when the determining unit 1401 determines that the first data in the GOP is lost through the first RLC entity, the discarding unit 1402 notifies the SDAP layer, the second PDCP entity and the At least one of the second RLC entities discards the second data in the GOP.
  • the path sequence of the notifications is:
  • the first RLC entity notifies the first PDCP entity, the first PDCP entity notifies the SDAP layer, the SDAP layer notifies the second PDCP entity, and the second PDCP entity notifies the third Two RLC entities; or,
  • the first RLC entity notifies the first PDCP entity, the first PDCP entity notifies the second PDCP entity, and the second PDCP entity notifies the second RLC entity; or,
  • the first RLC entity notifies the second RLC entity, the second RLC entity notifies the second PDCP entity, and the second PDCP entity notifies the SDAP layer; or,
  • the first RLC entity notifies the second RLC entity, and the second RLC entity notifies the second PDCP entity; or,
  • the first RLC entity notifies the second RLC entity.
  • the notification carries at least one of the following information:
  • the second indication information is used to indicate the first data loss in the GOP
  • the GOP identifier is the identifier of the GOP that lost the first data
  • the PDCP SN list is used to indicate the PDCP SN corresponding to the discarded one or more second data
  • the starting PDCP SN is used to indicate the PDCP SN corresponding to the discarded starting second data
  • Terminating PDCP SN the terminating PDCP SN is used to indicate the PDCP SN corresponding to the discarded terminating second data
  • the PDCP SN length is used to indicate the number of PDCP SNs corresponding to the discarded one or more second data.
  • the determining unit 1401 is also configured to determine whether the first data in the GOP is lost based on the indication of the MAC layer.
  • the MAC layer is configured with the following functions through RRC signaling: after the MAC layer transmits data and obtains ACK/NACK feedback information for the data, it The information indicates to the RLC layer whether the data was transmitted correctly.
  • the configured functions of the MAC layer are configured according to the LCID level.
  • the determining unit 1401 is also configured to determine whether the first data in the GOP is lost based on the ACK/NACK feedback of the RLC entity of the second node, and the second node is the first The receiving end of data.
  • the PDCP layer of the first node is configured with at least one packet loss timer, and each packet loss timer in the at least one packet loss timer is associated with at least one of the following: frame type , Qos attributes, LCID.
  • the determining unit 1401 is also configured to determine the packet loss timing corresponding to the data based on at least one of the frame type, Qos attribute and LCID of the received data through the PDCP layer. device, and after receiving the data, starts the packet loss timer corresponding to the data.
  • Figure 15 is a schematic diagram 4 of the structure of a data transmission device provided by an embodiment of the present application. It is applied to the first node. As shown in Figure 15, the data transmission device includes:
  • the receiving unit 1501 is configured to receive a data recovery indication sent by the second node, where the data recovery indication is used to trigger the PDCP layer of the first node to perform data recovery on part of the data.
  • the data recovery indication includes at least one of the following information associated with the partial data: DRB identifier, GOP identifier list, PDU set identifier list, and frame type.
  • the triggering conditions for sending the data recovery indication include at least one of the following:
  • RLC release and addition are performed based on RRC configuration
  • the RLC entity performed RLC reconstruction
  • the bearer type was changed based on RRC configuration
  • the PDCP layer of the second node determines that the triggering condition is met.
  • the device further includes: a sending unit 1502, configured to resend the first data in the first window through the PDCP layer, where the first data is data corresponding to the first frame type.
  • the termination SN of the first window is the PDCP SN of the latest PDCP PDU submitted by the PDCP layer of the first node to the RLC layer, and the length of the first window is configured through RRC signaling. .
  • the length of the first window is configured at the UE level or at the PDCP level or at the DRB level.
  • the length of the first window is expressed by the number of PDCP SNs or by time or by the number of time domain units.
  • the length of the time slot is the time slot length corresponding to the reference SCS
  • the reference SCS is the SCS configured by RRC signaling or the data Restore the BWP-enabled SCS where the indication resides.
  • the data recovery indication is carried in MAC CE or DCI.
  • Figure 16 is a schematic diagram 5 of the structure of a data transmission device provided by an embodiment of the present application. It is applied to the second node. As shown in Figure 16, the data transmission device includes:
  • the sending unit 1601 is configured to send a data recovery indication to the first node, where the data recovery indication is used to trigger the PDCP layer of the first node to perform data recovery on part of the data.
  • the data recovery indication includes at least one of the following information associated with the partial data: DRB identifier, GOP identifier list, PDU set identifier list, and frame type.
  • the triggering conditions for sending the data recovery indication include at least one of the following:
  • RLC release and addition are performed based on RRC configuration
  • the RLC entity performed RLC reconstruction
  • the bearer type was changed based on RRC configuration
  • the PDCP layer of the second node determines that the triggering condition is met.
  • the device further includes: a determination unit 1602, configured to start the first timer after sending the data recovery indication through the PDCP layer, and set the most recently received PDCP SN as the first recovery PDCP SN; when the first timer times out, if there is a PDCP SN within the first PDCP SN range that has not been received by the PDCP layer of the second node, it is determined that the trigger condition is met; wherein, the first PDCP SN The range includes the first recovery PDCP SN and the PDCP SN before the first recovery PDCP SN; or the first PDCP SN range includes the PDCP SN between the first recovery PDCP SN and the second recovery PDCP SN. , the second recovery PDCP SN is the recovery PDCP SN corresponding to the last time the first timer was started.
  • a determination unit 1602 configured to start the first timer after sending the data recovery indication through the PDCP layer, and set the most recently received PDCP SN as the first recovery
  • the device further includes: a determination unit 1602, configured to start a second timer through the PDCP layer if there is a PDCP SN that has not been received by the PDCP layer of the second node; When the second timer times out, if there is still a PDCP SN that has not been received by the PDCP layer of the second node, it is determined that the triggering condition is met.
  • the device further includes: a determining unit 1602, configured to determine that the triggering condition is satisfied if there is a PDCP SN that has not been received by the PDCP layer of the second node.
  • the device further includes: a determination unit 1602, configured to determine if there is a PDCP SN that has not been received by the PDCP layer of the second node and the data corresponding to the PDCP SN that has not been received belongs to the first If the data corresponding to a frame type is determined, the trigger condition is satisfied.
  • a determination unit 1602 configured to determine if there is a PDCP SN that has not been received by the PDCP layer of the second node and the data corresponding to the PDCP SN that has not been received belongs to the first If the data corresponding to a frame type is determined, the trigger condition is satisfied.
  • the data recovery indication is carried in MAC CE or DCI.
  • Figure 17 is a schematic structural diagram of a communication device 1700 provided by an embodiment of the present application.
  • the communication device can be a terminal device or a network device.
  • the communication device 1700 shown in Figure 17 includes a processor 1710.
  • the processor 1710 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the communication device 1700 may also include a memory 1720.
  • the processor 1710 can call and run the computer program from the memory 1720 to implement the method in the embodiment of the present application.
  • the memory 1720 may be a separate device independent of the processor 1710 , or may be integrated into the processor 1710 .
  • the communication device 1700 can also include a transceiver 1730, and the processor 1710 can control the transceiver 1730 to communicate with other devices. Specifically, it can send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 1730 may include a transmitter and a receiver.
  • the transceiver 1730 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 1700 can be specifically a network device according to the embodiment of the present application, and the communication device 1700 can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, details will not be repeated here. .
  • the communication device 1700 can be a mobile terminal/terminal device according to the embodiment of the present application, and the communication device 1700 can implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For the sake of simplicity, , which will not be described in detail here.
  • Figure 18 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 1800 shown in Figure 18 includes a processor 1810.
  • the processor 1810 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the chip 1800 may also include a memory 1820.
  • the processor 1810 can call and run the computer program from the memory 1820 to implement the method in the embodiment of the present application.
  • the memory 1820 may be a separate device independent of the processor 1810 , or may be integrated into the processor 1810 .
  • the chip 1800 may also include an input interface 1830.
  • the processor 1810 can control the input interface 1830 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.
  • the chip 1800 may also include an output interface 1840.
  • the processor 1810 can control the output interface 1840 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in the various methods of the embodiment of the present application.
  • the details will not be described again.
  • the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiment of the present application. For the sake of simplicity, here No longer.
  • chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.
  • Figure 19 is a schematic block diagram of a communication system 1900 provided by an embodiment of the present application. As shown in Figure 19, the communication system 1900 includes a terminal device 1910 and a network device 1920.
  • the terminal device 1910 can be used to implement the corresponding functions implemented by the terminal device in the above method
  • the network device 1920 can be used to implement the corresponding functions implemented by the network device in the above method.
  • no further details will be given here. .
  • the processor in the embodiment of the present application may be an integrated circuit chip and has signal processing capabilities.
  • each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available processors.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which is used as an external cache.
  • RAM Random Access Memory
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • Synchlink DRAM SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application can also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, memories in embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.
  • Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of simplicity, here No longer.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiment of the present application. , for the sake of brevity, will not be repeated here.
  • An embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of brevity, they are not included here. Again.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, For the sake of brevity, no further details will be given here.
  • An embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in each method of the embodiment of the present application.
  • the computer program For the sake of simplicity , which will not be described in detail here.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiments of the present application.
  • the computer program When the computer program is run on the computer, it causes the computer to execute the various methods implemented by the mobile terminal/terminal device in the embodiments of the present application. The corresponding process, for the sake of brevity, will not be repeated here.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code. .

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Abstract

本申请实施例提供一种数据传输方法及装置、通信设备,一方面,该方法包括:PDCP层接收SDAP层发送的第一SDAP PDU,所述第一SDAP PDU是下行SDAP控制PDU。另一方面,终端设备接收网络设备发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU。再一方面,第一节点确定GOP中的第一数据丢失的情况下,所述第一节点丢弃所述GOP中的第二数据。再一方面,第一节点的PDCP层接收第二节点发送的数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。

Description

一种数据传输方法及装置、通信设备 技术领域
本申请实施例涉及移动通信技术领域,具体涉及一种数据传输方法及装置、通信设备。
背景技术
分组数据单元集(Packet Data Unit set,PDU set)由一个或多个分组数据单元(Packet Data Unit set,PDU)组成。对于一个PDU set来说,其代表一个帧或者一个视频片段,PDU set内的每个PDU代表一个应用层的数据包。然而,目前的移动通信系统中,无线空口对于待传输数据的处理仅能识别出一个一个的数据包(即PDU),识别不出PDU之间的关联,更识别不出PDU set或者帧之间的关联,导致在数据传输过程中不能将这些关联考虑进去,数据传输效率不能得到保障。
发明内容
本申请实施例提供一种数据传输方法及装置、通信设备、芯片、计算机可读存储介质、计算机程序产品、计算机程序。
本申请实施例提供的数据传输方法,包括:
分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)层接收业务数据适配协议业务数据适配协议(Service Data Adaptation Protocol,SDAP)层发送的第一SDAP PDU,所述第一SDAP PDU是下行SDAP控制PDU,其中,所述下行SDAP控制PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第一SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第一SDAP PDU关联的服务质量(Quality of Service,Qos)流标识;
第三信息,所述第三信息用于指示所述第一SDAP PDU属于的控制PDU类型;
第四信息,所述第四信息用于指示所述第一SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第一SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第一SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第一SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第一SDAP PDU关联的PDU set中至少部分PDU的标识。
本申请实施例提供的数据传输方法,包括:
终端设备接收网络设备发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU,其中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
数据信息。
本申请实施例提供的数据传输方法,包括:
第一节点确定图像组(A Group of Pictures,GOP)中的第一数据丢失的情况下,所述第一节点丢弃所述GOP中的第二数据;其中,所述第一数据为第一帧类型对应的数据,所述第二数据为第二帧类型对应的数据或者非第一帧类型对应数据。
本申请实施例提供的数据传输方法,包括:
第一节点的PDCP层接收第二节点发送的数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
本申请实施例提供的数据传输方法,包括:
第二节点向第一节点发送数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
本申请实施例提供的数据传输装置,具有PDCP层和SDAP层;
所述SDAP层,用于向PDCP层发送第一SDAP PDU;
所述PDCP层,用于接收SDAP层发送的第一SDAP PDU;所述第一SDAP PDU是下行SDAP控制PDU,其中,所述下行SDAP控制PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第一SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第一SDAP PDU关联的Qos流标识;
第三信息,所述第三信息用于指示所述第一SDAP PDU属于的控制PDU类型;
第四信息,所述第四信息用于指示所述第一SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第一SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第一SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第一SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第一SDAP PDU关联的PDU set中至少部分PDU的标识。
本申请实施例提供的数据传输装置,应用于终端设备,所述装置包括:
接收单元,用于接收网络设备发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU,其中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
数据信息。
本申请实施例提供的数据传输装置,应用于第一节点,所述装置包括:
确定单元,用于确定GOP中的第一数据是否丢失;
丢弃单元,用于在确定GOP中的第一数据丢失的情况下,丢弃所述GOP中的第二数据;其中,所述第一数据为第一帧类型对应的数据,所述第二数据为第二帧类型对应的数据或者非第一帧类型对应数据。
本申请实施例提供的数据传输装置,应用于第一节点,所述装置包括:
接收单元,用于接收第二节点发送的数据恢复指示,所述数据恢复指示用于触发所述第一节 点的PDCP层针对部分数据执行数据恢复。
本申请实施例提供的数据传输装置,应用于第二节点,所述装置包括:
发送单元,用于向第一节点发送数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
本申请实施例提供的通信设备,包括处理器和存储器。该存储器用于存储计算机程序,该处理器用于调用并运行该存储器中存储的计算机程序,执行上述的数据传输方法。
本申请实施例提供的芯片,用于实现上述的数据传输方法。
具体地,该芯片包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有该芯片的设备执行上述的数据传输方法。
本申请实施例提供的计算机可读存储介质,用于存储计算机程序,该计算机程序使得计算机执行上述的数据传输方法。
本申请实施例提供的计算机程序产品,包括计算机程序指令,该计算机程序指令使得计算机执行上述的数据传输方法。
本申请实施例提供的计算机程序,当其在计算机上运行时,使得计算机执行上述的数据传输方法。
通过上述技术方案,一方面,引入下行SDAP控制PDU,通过该下行SDAP控制PDU中携带的信息可以实现PDCP层识别出PDU之间的关联,以及识别出PDU set或者帧之间的关联,从而可以在数据传输过程中将这些关联考虑进去,提高数据传输效率。另一方面,引入新格式的下行SDAP数据PDU,该新格式的下行SDAP数据PDU中携带的信息可以实现PDCP层识别出PDU之间的关联,以及识别出PDU set或者帧之间的关联,从而可以在数据传输过程中将这些关联考虑进去,提高数据传输效率。再一方面,第一节点在确定GOP中的第一数据丢失的情况下,丢弃GOP中的第二数据,从而提高传输效率,降低不必要的数据传输。再一方面,针对不同的数据包,根据帧类型、Qos属性和逻辑信道标识(LCID)中的至少之一,PDCP层采用不同的丢包定时器,从而提高数据的可靠性。再一方面,由第二节点触发数据恢复,第一节点针对部分数据执行数据恢复,提高部分数据的可靠性。
附图说明
此处所说明的附图用来提供对本申请的进一步理解,构成本申请的一部分,本申请的示意性实施例及其说明用于解释本申请,并不构成对本申请的不当限定。在附图中:
图1是一种应用场景的示意图;
图2是一种5G网络系统架构图;
图3是一种Qos机制的示意图;
图4是本申请实施例提供的PDU set传输示意图;
图5是本申请实施例提供的数据传输方法的流程示意图一;
图6是本申请实施例提供的数据传输方法的流程示意图二;
图7-1是本申请实施例提供的下行SDAP控制PDU的格式示意图一;
图7-2是本申请实施例提供的下行SDAP控制PDU的格式示意图二;
图8-1是本申请实施例提供的下行SDAP数据PDU的格式示意图一;
图8-2是本申请实施例提供的下行SDAP数据PDU的格式示意图二;
图8-3是本申请实施例提供的下行SDAP数据PDU的格式示意图三;
图8-4是本申请实施例提供的下行SDAP数据PDU的格式示意图四;
图9是本申请实施例提供的数据传输方法的流程示意图三;
图10-1是本申请实施例提供的第一节点的协议栈示意图一;
图10-2是本申请实施例提供的第一节点的协议栈示意图二;
图11是本申请实施例提供的数据传输方法的流程示意图四;
图12是本申请实施例提供的数据传输装置的结构组成示意图一;
图13是本申请实施例提供的数据传输装置的结构组成示意图二;
图14是本申请实施例提供的数据传输装置的结构组成示意图三;
图15是本申请实施例提供的数据传输装置的结构组成示意图四;
图16是本申请实施例提供的数据传输装置的结构组成示意图五;
图17是本申请实施例提供的一种通信设备示意性结构图;
图18是本申请实施例的芯片的示意性结构图;
图19是本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
图1是本申请实施例的一个应用场景的示意图。
如图1所示,通信系统100可以包括终端设备110和网络设备120。网络设备120可以通过空口与终端设备110通信。终端设备110和网络设备120之间支持多业务传输。
应理解,本申请实施例仅以通信系统100进行示例性说明,但本申请实施例不限定于此。也就是说,本申请实施例的技术方案可以应用于各种通信系统,例如:长期演进(Long Term Evolution,LTE)系统、LTE时分双工(Time Division Duplex,TDD)、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)、物联网(Internet of Things,IoT)系统、窄带物联网(Narrow Band Internet of Things,NB-IoT)系统、增强的机器类型通信(enhanced Machine-Type Communications,eMTC)系统、5G通信系统(也称为新无线(New Radio,NR)通信系统),或未来的通信系统等。
在图1所示的通信系统100中,网络设备120可以是与终端设备110通信的接入网设备。接入网设备可以为特定的地理区域提供通信覆盖,并且可以与位于该覆盖区域内的终端设备110(例如UE)进行通信。
网络设备120可以是长期演进(Long Term Evolution,LTE)系统中的演进型基站(Evolutional Node B,eNB或eNodeB),或者是下一代无线接入网(Next Generation Radio Access Network,NG RAN)设备,或者是NR系统中的基站(gNB),或者是云无线接入网络(Cloud Radio Access Network,CRAN)中的无线控制器,或者该网络设备120可以为中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器,或者未来演进的公共陆地移动网络(Public Land Mobile Network,PLMN)中的网络设备等。
终端设备110可以是任意终端设备,其包括但不限于与网络设备120或其它终端设备采用有线或者无线连接的终端设备。
例如,所述终端设备110可以指接入终端、用户设备(User Equipment,UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、IoT设备、卫星手持终端、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、计算设备或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、5G网络中的终端设备或者未来演进网络中的终端设备等。
终端设备110可以用于设备到设备(Device to Device,D2D)的通信。
无线通信系统100还可以包括与基站进行通信的核心网设备130,该核心网设备130可以是5G核心网(5G Core,5GC)设备,例如,接入与移动性管理功能(Access and Mobility Management Function,AMF),又例如,认证服务器功能(Authentication Server Function,AUSF),又例如,用户面功能(User Plane Function,UPF),又例如,会话管理功能(Session Management Function,SMF)。可选地,核心网络设备130也可以是LTE网络的分组核心演进(Evolved Packet Core,EPC)设备,例如,会话管理功能+核心网络的数据网关(Session Management Function+Core Packet Gateway,SMF+PGW-C)设备。应理解,SMF+PGW-C可以同时实现SMF和PGW-C所能实现的功能。在网络演进过程中,上述核心网设备也有可能叫其它名字,或者通过对核心网的功能进行划分形成新的网络实体,对此本申请实施例不做限制。
通信系统100中的各个功能单元之间还可以通过下一代网络(next generation,NG)接口建立连接实现通信。
例如,终端设备通过NR接口与接入网设备建立空口连接,用于传输用户面数据和控制面信令;终端设备可以通过NG接口1(简称N1)与AMF建立控制面信令连接;接入网设备例如下一代无线接入基站(gNB),可以通过NG接口3(简称N3)与UPF建立用户面数据连接;接入网设备可以通过NG接口2(简称N2)与AMF建立控制面信令连接;UPF可以通过NG接口4(简称N4) 与SMF建立控制面信令连接;UPF可以通过NG接口6(简称N6)与数据网络交互用户面数据;AMF可以通过NG接口11(简称N11)与SMF建立控制面信令连接;SMF可以通过NG接口7(简称N7)与PCF建立控制面信令连接。
图1示例性地示出了一个基站、一个核心网设备和两个终端设备,可选地,该无线通信系统100可以包括多个基站设备并且每个基站的覆盖范围内可以包括其它数量的终端设备,本申请实施例对此不做限定。
需要说明的是,图1只是以示例的形式示意本申请所适用的系统,当然,本申请实施例所示的方法还可以适用于其它系统。此外,本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。还应理解,在本申请的实施例中提到的“指示”可以是直接指示,也可以是间接指示,还可以是表示具有关联关系。举例说明,A指示B,可以表示A直接指示B,例如B可以通过A获取;也可以表示A间接指示B,例如A指示C,B可以通过C获取;还可以表示A和B之间具有关联关系。还应理解,在本申请的实施例中提到的“对应”可表示两者之间具有直接对应或间接对应的关系,也可以表示两者之间具有关联关系,也可以是指示与被指示、配置与被配置等关系。还应理解,在本申请的实施例中提到的“预定义”或“预定义规则”可以通过在设备(例如,包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现,本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。还应理解,本申请实施例中,所述"协议"可以指通信领域的标准协议,例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议,本申请对此不做限定。
为便于理解本申请实施例的技术方案,以下对本申请实施例的相关技术进行说明,以下相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合,其均属于本申请实施例的保护范围。
5G网络架构
图2为5G网络系统架构图,如图2所示,5G网络系统中涉及到的网元包括:用户设备(User Equipment,UE)、无线接入网(Radio Access Network,RAN)、用户面功能(User Plane Function,UPF)、数据网络(Data Network,DN)、接入和移动性管理功能(Access and Mobility Management Function,AMF)、会话管理功能(Session Management Function,SMF)、策略控制功能(Policy Control Function,PCF)、应用功能(Application Function,AF)、鉴权服务器功能(Authentication Server Function,AUSF)、统一数据管理(Unified Data Management,UDM)。
如图2所示,UE通过Uu接口与RAN进行接入层(AS)连接,交互接入层消息及无线数据传输。UE通过N1接口与AMF进行非接入层(NAS)连接,交互NAS消息。AMF是核心网中的移动性管理功能,SMF是核心网中的会话管理功能,AMF在对UE进行移动性管理之外,还负责将从会话管理相关消息在UE和SMF之间进行转发。PCF是核心网中的策略管理功能,负责制定对UE的移动性管理、会话管理、计费等相关的策略。UPF是核心网中的用户面功能,通过N6接口与DN进行数据传输,通过N3接口与RAN进行数据传输。
Qos机制
在移动通信网络中,为了能够传输用户面数据,需要建立一个或多个Qos流(Qos Flow)。作为通信质量的重要衡量标准,通常使用Qos参数来指示Qos流的特征,不同的Qos流对应不同的Qos参数。Qos参数可以包括但不限于:5G服务质量标识(5G Qos Identifier,5QI)、分配保留优先级(Allocation Retension Priority,ARP)、保证流比特率(Guaranteed Flow Bit Rate,GFBR)、最大流比特率(Maximum Flow Bit Rate,MFBR)、上/下行最大丢包率(UL/DL Maximum Packet Loss Rate,UL/DL MPLR)、端到端数据包时延预算(Packet Delay Budget,PDB)、AN-PDB、包误差率(Packet Error Rate,PER)、优先等级(Priority Level)、平均窗口(Averaging Window)、资源类型(Resource Type)、最大数据突发量(Maximum Data Burst Volume)、UE聚合最大比特率(UE Aggregate Maximum Bit Rate,UE-AMBR)、会话聚合最大比特率(Session Aggregate Maximum Bit Rate,Session-AMBR)等。
过滤器(Filter)包含描述数据包的特征参数(例如IP数据包的一些相关参数,以太网数据包的一些相关参数),用于过滤出特定的数据包以绑定到特定的Qos流上。这里,最常用的Filter就是IP五元组,即源IP地址、目标IP地址、源端口号、目标端口号以及协议类型。
参照图3,UPF和UE会根据数据包的特征参数组合来形成过滤器(如图3中最左边的梯形和最右边的平行四边形代表过滤器),通过过滤器过滤在用户面传递的符合数据包的特征参数的上行或下 行数据包,并将其绑定到某一个Qos流上。上行Qos流是由UE进行绑定的,下行Qos流是由UPF进行绑定的。在Qos机制中,一个或多个Qos流可以映射到一个数据无线承载(Data Resource Bearer,DRB)上进行传输。对于一个Qos流来说,对应一套Qos参数,基站会根据Qos参数来建立DRB并将Qos流绑定到特定的DRB上。
Qos流由SMF触发建立。当Qos需要调整时,UE和网络侧均可触发PDU会话修改流程,从而改变Qos。以UE为例,UE可以通过发送PDU会话修改请求(PDU Session Modification Request)消息来修改Qos流的Qos参数或者建立新的Qos流。也就是说,当UE调整Qos时,需要执行一个会话修改流程,且必须得到网络的同意。由于PDU会话修改流程这一过程需要较长时间,同时也不能保证一定可以修改成功,因此会影响应用的行为,即应用无法准确判定是否以及多久可以使用其希望的Qos,这对于很多实时性业务,比如机器学习、神经网络分析等会产生较大影响。造成Qos改变情况也有很多,作为示例,以下几种情况均可造成Qos改变:1)发生了基站切换;2)发生了网络拥塞(如用户数突然增多)3)UE移入或移出了特定的范围(如边缘服务器的服务范围)。
为便于理解本申请实施例的技术方案,以下对本申请实施例的相关术语进行说明,以下相关术语的含义作为可选方案与本申请实施例的技术方案可以进行任意结合,其均属于本申请实施例的保护范围。
云游戏(Cloud Gaming,CG):指的是一组用例,其中绝大多数与游戏相关的计算(单人或多人)从UE卸载到边缘或远程服务器。
扩展现实(EXtended Reality,XR):是多个异构用例和服务的大范围保护伞,XR用例可以大致分为:增强现实(Augmented Reality,AR)、虚拟现实(Virtual Reality,VR)、混合现实(Mixed Reality,MR)。
扩展现实和媒体服务(Extended Reality and media services,XRM):XR和媒体服务的结合技术。
视频片段(Video Slice):视频帧中空间上不同的区域,与同一帧中的其他区域分开编码。
PDU集(PDU Set):由一个或多个PDU组成,这些PDU承载着在应用层生成的一个信息单元(例如,XRM服务的帧或视频片段),这些信息在应用层具有相同的重要性要求。应用层需要PDU set中的所有PDU来使用相应的信息单元。在某些情况下,当一些PDU丢失时,应用层仍然可以恢复部分信息单元。
I帧(I-frame):作为帧内编码图片,它是一个完整的图片,可以像JPG图像文件一样独立编码和解码。
P帧(P-frame):作为预测图片,它不是一个完整的帧,只包含与前一帧相比的图像变化。如果参考帧丢失,P帧将无法解码和显示。
B帧(B-frame):作为双向预测图片,包含前一参考帧和后一参考帧之间的变化。参考帧越多,压缩比就越高。然而,仅当前一参考帧和后一参考帧可用时,才能对B帧进行解码。
图像组(A Group of Pictures,GOP):包括连续视频帧的集合。一般,GOP的第一帧是I帧,后面的帧可以是P帧或B帧。
对于媒体业务,视频压缩编解码过程中会产生I帧,P帧,B帧等。而PDU set是一组PDU,这组PDU代表一个帧或者一个视频片段。一个PDU set中的各个PDU之间是关联的,丢掉PDU set中任何一个PDU都会导致该PDU set无法解码成功,造成视频图像部分缺失。而I帧,P帧,B帧有着不同的重要程度,例如一个I帧关联多个P帧,如果I丢失则所有P帧都无法解码,如果P帧丢失,则可以通过I帧和其他P帧恢复,所以I帧很重要不能丢失。
然而,目前的移动通信系统中,无线空口对于待传输数据的处理仅能识别出一个一个的数据包(即PDU),识别不出PDU之间的关联,更识别不出PDU set或者帧之间的关联,导致在数据传输过程中不能将这些关联考虑进去。具有关联关系的数据包(也即PDU)承载在同一Qos流或者数据承载上,而在空口数据传输和处理中,同一Qos流或者数据承载上的数据包具有相同的处理方式,不会因为数据不同而采用不同的处理方式,然而,对于PDU set来说,不同PDU set内的PDU有不同的处理需求,针对不同的PDU(也即数据包)采用不同的处理方式能够更好的改善多媒体业务的性能和用户体验。
为此,提出了本申请实施例的以下技术方案。需要说明的是,本申请实施例的技术方案可以但不局限于应用于5G NR系统架构,例如还可以应用于未来的增强的NR系统架构等。
为便于理解本申请实施例的技术方案,以下通过具体实施例详述本申请的技术方案。以上相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合,其均属于本申请实施例的保护范围。本申请实施例包括以下内容中的至少部分内容。
对于一个GOP来说,包含一组帧,这些帧可能来自不同的Qos流或者来自同一个Qos流。GOP中的每个帧都有自己的类型,如I帧、B帧、P帧等,作为一种实现方式,GOP可以包含一个I帧以及与其关联的至少一个P帧和/或至少一个B帧。为了能够识别出属于一个GOP的各个帧,定义一个GOP标识(如GOP id或者GOP SN或者GOP index等),通过该GOP标识来标识一个GOP,而GOP中的每个帧都会关联该GOP标识,从而通过该GOP标识来识别出属于一个GOP的各个帧。需要说明的是,GOP标识的形式不限定是GOP id或者GOP SN或者GOP index等,还可以是其他形式,例如一定时间间隔或者一定周期,将一定时间间隔或者一定周期内的各个帧归属于一个GOP。
对于一个帧来说,也即是一个PDU set,由多个PDU组成。为了方便空口上进行数据传输/重传和调度,为每个PDU set定义PDU set标识(如PDU set id或者PDU set SN或者PDU set index等),通过该PDU set标识来标识一个PDU set。PDU set标识在一个GOP内唯一。
对于一个PDU来说,为了标识一个PDU set内的每个PDU,为每个PDU定义PDU标识(如PDU id或者PDU SN或者PDU index等),通过该PDU标识来标识一个PDU标识。PDU标识在PDU set内唯一。
综上所述,每个PDU可以与以下至少一种信息关联:GOP标识、PDU set标识、PDU标识、帧类型。
图4是本申请实施例提供的PDU set传输示意图,如图4所示,一个PDU set中的PDU属于一个Qos流,且他们之间的顺序是按序在GPRS隧道协议(GPRS Tunnelling Protocol,GTP)隧道中传输的,即PDU set之间不会交叉传输。
图5是本申请实施例提供的数据传输方法的流程示意图一,如图5所示,所述数据传输方法包括以下步骤:
步骤501:分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)层接收业务数据适配协议(Service Data Adaptation Protocol,SDAP)层发送的第一SDAP PDU,所述第一SDAP PDU是下行SDAP控制PDU。
本申请实施例中,所述PDCP层和SDAP层为通信设备的协议层,对于下行传输来说,该通信设备为网络设备,例如基站。
本申请实施例中,对于下行方向,引入了下行SDAP控制PDU。可选地,该下行SDAP控制PDU可以称为下行SDAP结束标志(DL SDAP End-Marker),当然,该下行SDAP控制PDU还可以称为其他名称,本申请对该下行SDAP控制PDU的名称不做限定。
在一些可选实施方式中,所述下行SDAP控制PDU由SDAP层(或者说SDAP实体)按照Qos流级别(per Qos flow)产生,并且终结在本地的PDCP层。换句话说,所述下行SDAP控制PDU为某个Qos流的下行SDAP控制PDU,SDAP层将该下行SDAP控制PDU传输到本地PDCP层后,本地PDCP层基于所述下行SDAP控制PDU识别至少一种信息后,丢弃所述下行SDAP控制PDU。
在一些可选实施方式中,所述下行SDAP控制PDU传输在一个PDU set之后和/或另一个PDU set之前,从而将不同的PDU set分割开。对于一个下行SDAP控制PDU来说,其关联的PDU set可以是指该下行SDAP控制PDU之前最近一个PDU set和/或最后最近一个PDU set。
需要说明的是,PDU set代表一个帧,应理解,本申请中关于“PDU set”的描述可以替换为其所代表的“帧”,同样,本申请中关于“帧”的描述可以替换为其对应的“PDU set”。
本申请实施例中,所述下行SDAP控制PDU具有特定的格式,具体地,所述下行SDAP控制PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第一SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第一SDAP PDU关联的Qos流标识;
第三信息,所述第三信息用于指示所述第一SDAP PDU属于的控制PDU类型;
第四信息,所述第四信息用于指示所述第一SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第一SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第一SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第一SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第一SDAP PDU关联的PDU set中至少部分PDU的标识,例如PDU set中每个PDU的标识。
这里,所述第一SDAP PDU关联的Qos流标识可以是指:所述第一SDAP PDU所属的Qos流的标识,或者,所述第一SDAP PDU关联的PDU set或者帧所属的Qos流的标识。
在一些可选实施方式中,所述PDCP层基于所述下行SDAP控制PDU识别以下至少一种信息:
具有关联关系的SDAP PDU或者SDAP SDU,所述关联关系是指属于同一个PDU set或者帧;
PDU set或者帧的帧类型;
PDU set或者帧或者PDU的Qos属性;
PDU set或者帧的标识;
PDU set或者帧所属的GOP的标识;
PDU set中至少部分PDU的标识,例如PDU set中每个PDU的标识。
上述方案中,帧类型例如可以是I帧、或P帧、或B帧、或其他帧类型。
上述方案中,Qos属性例如是否允许丢包,丢包率,时延等。
在一些可选实施方式中,所述PDCP层接收所述SDAP层发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU。这里,引入新格式的下行SDAP数据PDU,新格式的下行SDAP数据PDU与旧格式的下行SDAP数据PDU不同,为便于描述,将新格式的下行SDAP数据PDU称为第一格式的下行SDAP数据PDU,将旧格式的下行SDAP数据PDU称为第二格式的下行SDAP数据PDU。下行SDAP数据PDU用于承载数据信息,该数据信息可以是一个PDU的信息或者级联的多个PDU的信息,此外,下行SDAP数据PDU还可以承载其他额外的信息。以下对第一格式的下行SDAP数据PDU以及第二格式的下行SDAP数据PDU进行说明。
本申请实施例中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
数据信息。
这里,所述第二SDAP PDU关联的Qos流标识可以是指:所述第二SDAP PDU所属的Qos流的标识,或者,所述第二SDAP PDU关联的PDU set或者帧所属的Qos流的标识。
上述方案中,帧类型例如可以是I帧、或P帧、或B帧、或其他帧类型。
上述方案中,Qos属性例如是否允许丢包,丢包率,时延等。
上述方案中,RDI是指反射的Qos流到DRB映射指示(Reflective QoS flow to DRB mapping Indication)。
上述方案中,RQI是指反射的Qos指示(Reflective QoS Indication)。
本申请实施例中,具有第二格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
数据信息。
在一些可选实施方式中,第一格式的下行SDAP数据PDU和第二格式的下行SDAP数据PDU需要共存,对于网络设备来说,网络设备需要确定采用哪种格式的下行SDAP数据PDU,也即所述网络设备确定下行SDAP数据PDU的格式为所述第一格式还是第二格式。这里,所述网络设备可以通过以下方式确定下行SDAP数据PDU的格式为所述第一格式还是第二格式。
方式一:若所述网络设备接收到终端设备上报的第一能力信息,则所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;若所述网络设备未接收到终端设备上报的第一能力信息, 则所述网络设备确定下行SDAP数据PDU的格式为第二格式;其中,所述第一能力信息用于指示所述终端设备支持所述第一格式的下行SDAP数据PDU。
这里,网络设备确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos流或者终端设备全部Qos流。可选地,目标类型业务例如是XR业务。
作为示例:第一能力信息可以称为增强SDAP的能力指示信息。这里,若终端设备上报第一能力信息,则网络设备和终端设备都默认使用第一格式作为下行SDAP数据PDU的格式(应用范围为XR业务对应的Qos流或者终端设备全部Qos流),否则,使用第二格式作为下行SDAP数据PDU的格式。
方式二:所述网络设备接收终端设备上报的第二能力信息;若所述第二能力信息指示所述终端设备支持第一能力,则所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;若所述第二能力信息指示所述终端设备不支持第一能力,则所述网络设备确定下行SDAP数据PDU的格式为第二格式;其中,所述第一能力是指所述终端设备支持所述第一格式的下行SDAP数据PDU的能力;或者,所述第一能力是指所述终端设备支持第一协议版本的能力,这里,第一协议版本例如是版本18(Rel18)以及之上版本。
这里,网络设备确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos流或者终端设备全部Qos流。可选地,目标类型业务例如是XR业务。
作为示例:第一能力可以称为增强SDAP的能力,或者,第一能力可以是增强协议版本能力。这里,若终端设备上报第二能力信息,且该第二能力信息指示终端设备支持第一格式的下行SDAP数据PDU的能力或者支持Rel18的能力,则网络设备和终端设备都默认使用第一格式作为下行SDAP数据PDU的格式(应用范围为XR业务对应的Qos流或者终端设备全部Qos流),否则,使用第二格式作为下行SDAP数据PDU的格式。
方式三:若终端设备被配置了目标类型业务,则所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;若终端设备未被配置目标类型业务,则所述网络设备确定下行SDAP数据PDU的格式为第二格式。可选地,目标类型业务例如是XR业务。
这里,网络设备确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos流或者终端设备全部Qos流。
作为示例:若终端设备被配置了XR业务,则网络设备和终端设备都默认使用第一格式作为下行SDAP数据PDU的格式(应用范围为XR业务对应的Qos流或者终端设备全部Qos流),否则,使用第二格式作为下行SDAP数据PDU的格式。
方式四:网络设备自己确定下行SDAP数据PDU的格式,并将确定的下行SDAP数据PDU的格式通知给终端设备。
具体地,网络设备可以通过RRC信令配置一个指示信息给终端设备,所述指示信息用于指示终端设备采用哪种格式作为下行SDAP数据PDU的格式。所述指示信息可以是Qos流级别(per Qos flow)配置的或者DRB级别(per DRB)配置的或者PDU会话级别(per PDU session)配置的或者UE级别(per UE)配置的。
作为示例:所述指示信息可以是一个布尔(Boolean)值或者一个枚举值。以下表1给出了三种可选的指示信息的实现方式。例如指示信息为sDPA-Type,其取值为old或者new,old代表第二格式,new代表第一格式。例如指示信息为newSDPA-Type,其取值为true或者false,true代表第一格式,false代表第二格式。例如指示信息为newSDPA-Type,其取值为Boolean值,不同的Boolean值代表不同的格式。
Figure PCTCN2022088094-appb-000001
表1
需要说明的是,上述方式一至方式四可以分别单独实施。或者,上述方式四可以和上述方式一或方式二或方式三结合起来实施,当结合起来实施时,方式四的优先级高于方式一至方式三, 即终端设备优先根据网络设备的指示信息确定下行SDAP数据PDU的格式,当网络设备没有配置指示信息时,根据上述方式一或方式二或方式三确定下行SDAP数据PDU的格式。
图6是本申请实施例提供的数据传输方法的流程示意图二,如图6所示,所述数据传输方法包括以下步骤:
步骤601:终端设备接收网络设备发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU。
这里,引入新格式的下行SDAP数据PDU,新格式的下行SDAP数据PDU与旧格式的下行SDAP数据PDU不同,为便于描述,将新格式的下行SDAP数据PDU称为第一格式的下行SDAP数据PDU,将旧格式的下行SDAP数据PDU称为第二格式的下行SDAP数据PDU。下行SDAP数据PDU用于承载数据信息,该数据信息可以是一个PDU的信息或者级联的多个PDU的信息,此外,下行SDAP数据PDU还可以承载其他额外的信息。以下对第一格式的下行SDAP数据PDU以及第二格式的下行SDAP数据PDU进行说明。
本申请实施例中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
数据信息。
这里,所述第二SDAP PDU关联的Qos流标识可以是指:所述第二SDAP PDU所属的Qos流的标识,或者,所述第二SDAP PDU关联的PDU set或者帧所属的Qos流的标识。
上述方案中,帧类型例如可以是I帧、或P帧、或B帧、或其他帧类型。
上述方案中,Qos属性例如是否允许丢包,丢包率,时延等。
上述方案中,RDI是指反射的Qos流到DRB映射指示(Reflective QoS flow to DRB mapping Indication)。
上述方案中,RQI是指反射的Qos指示(Reflective QoS Indication)。
本申请实施例中,具有第二格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
数据信息。
在一些可选实施方式中,第一格式的下行SDAP数据PDU和第二格式的下行SDAP数据PDU需要共存,对于终端设备来说,终端设备需要确定采用哪种格式的下行SDAP数据PDU,也即所述终端设备确定下行SDAP数据PDU的格式为所述第一格式还是第二格式。这里,所述终端设备可以通过以下方式确定下行SDAP数据PDU的格式为所述第一格式还是第二格式。
方式一:若所述终端设备向所述网络设备上报第一能力信息,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;若所述终端设备未向所述网络设备上报第一能力信息,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为第二格式;其中,所述第一能力信息用于指示所述终端设备支持所述第一格式的下行SDAP数据PDU。
这里,所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos流或者所述终端设备全部Qos流。可选地,目标类型业务例如是XR业务。
作为示例:第一能力信息可以称为增强SDAP的能力指示信息。这里,若终端设备上报第一能力信息,则网络设备和终端设备都默认使用第一格式作为下行SDAP数据PDU的格式(应用 范围为XR业务对应的Qos流或者终端设备全部Qos流),否则,使用第二格式作为下行SDAP数据PDU的格式。
方式二:所述终端设备向所述网络设备上报第二能力信息;若所述第二能力信息指示所述终端设备支持第一能力,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;若所述第二能力信息指示所述终端设备不支持第一能力,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为第二格式;其中,所述第一能力是指所述终端设备支持所述第一格式的下行SDAP数据PDU的能力;或者,所述第一能力是指所述终端设备支持第一协议版本的能力。
这里,所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos流或者所述终端设备全部Qos流。可选地,目标类型业务例如是XR业务。
作为示例:第一能力可以称为增强SDAP的能力,或者,第一能力可以是增强协议版本能力。这里,若终端设备上报第二能力信息,且该第二能力信息指示终端设备支持第一格式的下行SDAP数据PDU的能力或者支持Rel18的能力,则网络设备和终端设备都默认使用第一格式作为下行SDAP数据PDU的格式(应用范围为XR业务对应的Qos流或者终端设备全部Qos流),否则,使用第二格式作为下行SDAP数据PDU的格式。
方式三:若所述终端设备被配置了目标类型业务,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;若所述终端设备未被配置目标类型业务,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为第二格式。
这里,所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos流或者所述终端设备全部Qos流。可选地,目标类型业务例如是XR业务。
作为示例:若终端设备被配置了XR业务,则网络设备和终端设备都默认使用第一格式作为下行SDAP数据PDU的格式(应用范围为XR业务对应的Qos流或者终端设备全部Qos流),否则,使用第二格式作为下行SDAP数据PDU的格式。
方式四:所述终端设备接收所述网络设备发送的第一指示信息,所述第一指示信息用于指示所述终端设备是使用所述第一格式还是第二格式作为下行SDAP数据PDU的格式;所述终端设备基于所述第一指示信息,确定下行SDAP数据PDU的格式。
这里,可选地,所述第一指示信息为Qos流级别配置的或者DRB级别配置的或者PDU会话级别配置的或者UE级别配置的。
这里,可选地,所述第一指示信息通过RRC信令配置。
作为示例:所述指示信息可以是一个布尔(Boolean)值或者一个枚举值。前述方案中的表1给出了三种可选的指示信息的实现方式。例如指示信息为sDPA-Type,其取值为old或者new,old代表第二格式,new代表第一格式。例如指示信息为newSDPA-Type,其取值为true或者false,true代表第一格式,false代表第二格式。例如指示信息为newSDPA-Type,其取值为Boolean值,不同的Boolean值代表不同的格式。
以下结合具体应用示例对上述方案进行举例说明。
应用示例一
下行SDAP控制PDU的格式可以但不局限于如下格式:
格式一:如图7-1所示,下行SDAP控制PDU包括如下信息:D/C(对应第一信息)和Qos流标识(QFI)(对应第二信息)。其中,D/C用于指示SDAP PDU是数据PDU还是控制PDU;QFI用于指示SDAP PDU关联的Qos流标识。可选地,D/C占据1比特,这里,1比特的取值为0,用于指示SDAP PDU是控制PDU。
格式二:如图7-2所示,下行SDAP控制PDU包括如下信息:D/C(对应第一信息)、QFI(对应第二信息)、CPT(对应第三信息)、帧类型(对应第四信息)、GOP标识(对应第七信息)、PDU set标识(对应第六信息)、PDU标识(对应第八信息)和Qos信息(对应第五信息)。其中,D/C信息用于指示SDAP PDU是数据PDU还是控制PDU;QFI用于指示SDAP PDU关联的Qos流标识;CPT用于指示SDAP PDU属于的控制PDU类型;帧类型用于指示SDAP PDU关联的PDU set或者帧对应的帧类型;GOP标识用于指示SDAP PDU关联的PDU set或者帧所属的GOP的标识;PDU set标识用于指示SDAP PDU关联的PDU set或者帧的标识;PDU标识用于指示SDAP PDU关联的PDU set中至少部分PDU的标识;Qos信息用于指示SDAP PDU关联的PDU set 或者帧或者PDU的Qos属性。可选地,D/C占据1比特,这里,1比特的取值为0,用于指示SDAP PDU是控制PDU。
应用示例二
第一格式的下行SDAP数据PDU可以但不局限于如下格式:
格式一:如图8-1所示,下行SDAP数据PDU包括如下信息:D/C(对应第一信息)、QFI(对应第二信息)、CPT(对应第三信息)、RDI(对应第九信息)、RQI(对应第十信息)和数据信息。其中,D/C用于指示SDAP PDU是数据PDU还是控制PDU;QFI用于指示SDAP PDU关联的Qos流标识;CPT用于指示SDAP PDU属于的控制PDU类型。
格式二:如图8-2所示,下行SDAP数据PDU包括如下信息:D/C(对应第一信息)、QFI(对应第二信息)、RDI(对应第九信息)、RQI(对应第十信息)和数据信息。其中,D/C用于指示SDAP PDU是数据PDU还是控制PDU;QFI用于指示SDAP PDU关联的Qos流标识。
格式三:如图8-3所示,下行SDAP数据PDU包括如下信息:D/C(对应第一信息)、QFI(对应第二信息)、CPT(对应第三信息)、帧类型(对应第四信息)、GOP标识(对应第七信息)、PDU set标识(对应第六信息)、PDU标识(对应第八信息)和Qos信息(对应第五信息)、RDI、RQI和数据信息。其中,D/C信息用于指示SDAP PDU是数据PDU还是控制PDU;QFI用于指示SDAP PDU关联的Qos流标识;CPT用于指示SDAP PDU属于的控制PDU类型;帧类型用于指示SDAP PDU关联的PDU set或者帧对应的帧类型;GOP标识用于指示SDAP PDU关联的PDU set或者帧所属的GOP的标识;PDU set标识用于指示SDAP PDU关联的PDU set或者帧的标识;PDU标识用于指示SDAP PDU关联的PDU set中至少部分PDU的标识;Qos信息用于指示SDAP PDU关联的PDU set或者帧或者PDU的Qos属性。
格式四:如图8-4所示,下行SDAP数据PDU包括如下信息:D/C(对应第一信息)、QFI(对应第二信息)、帧类型(对应第四信息)、GOP标识(对应第七信息)、PDU set标识(对应第六信息)、PDU标识(对应第八信息)和Qos信息(对应第五信息)、RDI、RQI和数据信息。其中,D/C信息用于指示SDAP PDU是数据PDU还是控制PDU;QFI用于指示SDAP PDU关联的Qos流标识;帧类型用于指示SDAP PDU关联的PDU set或者帧对应的帧类型;GOP标识用于指示SDAP PDU关联的PDU set或者帧所属的GOP的标识;PDU set标识用于指示SDAP PDU关联的PDU set或者帧的标识;PDU标识用于指示SDAP PDU关联的PDU set中至少部分PDU的标识;Qos信息用于指示SDAP PDU关联的PDU set或者帧或者PDU的Qos属性。
本申请实施例的技术方案,一方面,引入下行SDAP控制PDU,通过该下行SDAP控制PDU中携带的信息可以实现PDCP层识别出PDU之间的关联,以及识别出PDU set或者帧之间的关联,从而可以在数据传输过程中将这些关联考虑进去,提高数据传输效率。另一方面,引入新格式的下行SDAP数据PDU,该新格式的下行SDAP数据PDU中携带的信息可以实现PDCP层识别出PDU之间的关联,以及识别出PDU set或者帧之间的关联,从而可以在数据传输过程中将这些关联考虑进去,提高数据传输效率。
图9是本申请实施例提供的数据传输方法的流程示意图三,如图9所示,所述数据传输方法包括以下步骤:
步骤901:第一节点确定GOP中的第一数据丢失的情况下,所述第一节点丢弃所述GOP中的第二数据;其中,所述第一数据为第一帧类型对应的数据,所述第二数据为第二帧类型对应的数据或者非第一帧类型对应数据。
本申请实施例中,所述第一节点为发送端,发送端可以向接收端发送数据。可选地,所述第一节点可以是网络设备(如基站),或者,所述第一节点可以是终端设备。
本申请实施例中,第一节点确定GOP中的第一数据丢失的情况下,所述第一节点丢弃所述GOP中的第二数据;其中,所述第一数据为第一帧类型对应的数据,所述第二数据为第二帧类型对应的数据或者非第一帧类型对应数据。这里,第一帧类型例如是I帧,第二帧类型或者非第一帧类型例如是B帧和/或P帧。
需要说明的是,一个数据可以对应PDU set中的一个PDU或者一个PDCP PDU或者一个PDCP SDU或者一个RLC PDU或者一个RLC SDU。第一数据的个数可以是一个或多个,第二数据的个数可以是一个或多个。
以下结合对第一节点如何实现丢弃数据进行说明。
需要说明的是,在PDCP层,每个数据对应一个PDCP SN,第一数据对应的PDCP SN包括一个或多个PDCP SN,同样,第二数据对应的PDCP SN包括一个或多个PDCP SN。
方案一
在一些可选实施方式中,所述第一节点具有一个PDCP实体和两个RLC实体,所述两个RLC实体包括第一RLC实体和第二RLC实体,所述PDCP实体用于传输所述第一数据和所述第二数据,所述第一RLC实体用于传输所述第一数据,所述第二RLC实体用于传输所述第二数据。
所述第一RLC实体确定GOP中的第一数据丢失的情况下,通知所述第二RLC实体丢弃所述GOP中的第二数据。
这里,所述通知的路径顺序为:
所述第一RLC实体通知到所述PDCP实体,所述PDCP实体通知到所述第二RLC实体;或者,
所述第一RLC实体通知到所述第二RLC实体。
在一些可选实施方式中,所述通知携带以下至少一种信息:
第二指示信息,所述第二指示信息用于指示GOP中的第一数据丢失;
GOP标识,所述GOP标识为丢失第一数据的GOP的标识;
PDCP SN列表,所述PDCP SN列表用于指示丢弃的一个或多个第二数据对应的PDCP SN;
起始PDCP SN,所述起始PDCP SN用于指示丢弃的起始第二数据对应的PDCP SN;
终止PDCP SN,所述终止PDCP SN用于指示丢弃的终止第二数据对应的PDCP SN;
PDCP SN长度,所述PDCP SN长度用于指示丢弃的一个或多个第二数据对应的PDCP SN个数。
这里,终止PDCP SN也可以不携带在所述通知中,终止PDCP SN可以默认是PDCP实体递交给第二RLC实体的最后一个数据对应的PDCP SN。
方案二
在一些可选实施方式中,所述第一节点具有两个PDCP实体和两个RLC实体,所述两个PDCP实体包括第一PDCP实体和第二PDCP实体,所述两个RLC实体包括第一RLC实体和第二RLC实体,所述第一PDCP实体和所述第一RLC实体用于传输所述第一数据,所述第二PDCP实体和所述第二RLC实体用于传输所述第二数据。
所述第一RLC实体确定GOP中的第一数据丢失的情况下,通知SDAP层、所述第二PDCP实体和所述第二RLC实体中的至少之一丢弃所述GOP中的第二数据。
这里,所述通知的路径顺序为:
所述第一RLC实体通知到所述第一PDCP实体,所述第一PDCP实体通知到SDAP层,所述SDAP层通知到所述第二PDCP实体,所述第二PDCP实体通知到所述第二RLC实体;或者,
所述第一RLC实体通知到所述第一PDCP实体,所述第一PDCP实体通知到所述第二PDCP实体,所述第二PDCP实体通知到所述第二RLC实体;或者,
所述第一RLC实体通知到所述第二RLC实体,所述第二RLC实体通知到所述第二PDCP实体,所述第二PDCP实体通知到SDAP层;或者,
所述第一RLC实体通知到所述第二RLC实体,所述第二RLC实体通知到所述第二PDCP实体;或者,
所述第一RLC实体通知到所述第二RLC实体。
在一些可选实施方式中,所述通知携带以下至少一种信息:
第二指示信息,所述第二指示信息用于指示GOP中的第一数据丢失;
GOP标识,所述GOP标识为丢失第一数据的GOP的标识;
PDCP SN列表,所述PDCP SN列表用于指示丢弃的一个或多个第二数据对应的PDCP SN;
起始PDCP SN,所述起始PDCP SN用于指示丢弃的起始第二数据对应的PDCP SN;
终止PDCP SN,所述终止PDCP SN用于指示丢弃的终止第二数据对应的PDCP SN;
PDCP SN长度,所述PDCP SN长度用于指示丢弃的一个或多个第二数据对应的PDCP SN个数。
这里,终止PDCP SN也可以不携带在所述通知中,终止PDCP SN可以默认是PDCP实体递交给第二RLC实体的最后一个数据对应的PDCP SN。
对于上述方案一和方案二来说,所述第一RLC实体可以通过以下方式确定GOP中的第一数据是否丢失。
方式A:所述第一RLC实体基于MAC层的指示,确定GOP中的第一数据是否丢失。
这里,所述MAC层通过RRC信令被配置了如下功能:所述MAC层在传输完数据并获取到 针对该数据的ACK/NACK反馈信息后,基于该ACK/NACK反馈信息向RLC层指示该数据是否正确传输。可选地,所述MAC层被配置的功能按照LCID级别配置的,例如:MAC层在传输完数据并获取ACK/NACK反馈信息后,向该数据所属的LCID对应的RLC实体指示该数据是否正确传输(也即该数据是否丢失)。
方式B:所述第一RLC实体基于第二节点的RLC实体的ACK/NACK反馈,确定GOP中的第一数据是否丢失,所述第二节点为所述第一数据的接收端。
以下结合具体应用示例对上述方案进行举例说明。
应用示例三
第一节点的协议栈如图10-1所示,具有一个PDCP实体和两个RLC实体,所述两个RLC实体包括RLC1实体(对应第一RLC实体)和RLC2实体(对应第二RLC实体),PDCP实体用于传输I帧数据,RLC1实体用于传输I帧数据,RLC2实体用于传输B帧和/或P帧数据。这里,RLC1实体的模式可以是确认(AM)模式或者非确认(UM)模式,RLC实体的模式可以是UM模式或者AM模式。
方案I-1)如果RLC1实体判断I帧数据丢失,则RLC1实体通知PDCP层I帧数据丢失以及丢失的I帧数据对应的GOP标识,PDCP层通知RLC2实体丢弃GOP标识对应的B帧和/或P帧数据。这里,PDCP层可以在给RLC2实体的通知中携带以下至少一种信息:PDCP SN列表、起始PDCP SN、终止PDCP SN、PDCP SN长度、GOP标识。这里,终止PDCP SN可以默认是PDCP实体递交给RLC2实体的最后一个数据对应的PDCP SN。
方案I-2)如果RLC1实体判断I帧数据丢失,则RLC1实体通知RLC2实体丢弃GOP标识对应的B帧和/或P帧数据。这里,RLC1实体可以在给RLC2实体的通知中携带以下至少一种信息:PDCP SN列表、起始PDCP SN、终止PDCP SN、PDCP SN长度、GOP标识。这里,终止PDCP SN可以默认是PDCP实体递交给RLC2实体的最后一个数据对应的PDCP SN。
需要说明的是,图10-1所示的协议栈中,B帧和P帧可以共用一个RLC实体,或者,也可以B帧用一个RLC实体,P帧用另一个RLC实体,也就是说,图10-1所示的协议栈包括3个RLC实体。
应用示例四
第一节点的协议栈如图10-2所示,具有两个PDCP实体和两个RLC实体,所述两个PDCP实体包括PDCP实体1(对应第一PDCP实体)和PDCP实体2(对应第二PDCP实体),所述两个RLC实体包括RLC1实体(对应第一RLC实体)和RLC2实体(对应第二RLC实体),PDCP1实体和RLC2实体用于传输I帧数据,PDCP2实体和RLC2实体用于传输B帧和/或P帧数据。这里,RLC1实体的模式可以是确认(AM)模式或者非确认(UM)模式,RLC实体的模式可以是UM模式或者AM模式。
方案II-1)如果RLC1实体判断I帧数据丢失,则RLC1实体通知PDCP1实体I帧数据丢失以及丢失的I帧数据对应的GOP标识,PDCP1实体通知SDAP层I帧数据丢失以及丢失的I帧数据对应的GOP标识;SDAP层丢弃GOP标识对应的B帧和/或P帧数据,SDAP层通知PDCP2实体I帧数据丢失以及丢失的I帧数据对应的GOP标识;PDCP2实体丢弃GOP标识对应的B帧和/或P帧数据,PDCP2实体通知RLC2实体I帧数据丢失以及丢失的I帧数据对应的GOP标识;RLC2实体弃GOP标识对应的B帧和/或P帧数据。这里,PDCP2实体可以在给RLC2实体的通知中携带以下至少一种信息:PDCP SN列表、起始PDCP SN、终止PDCP SN、PDCP SN长度、GOP标识。这里,终止PDCP SN可以默认是PDCP实体递交给RLC2实体的最后一个数据对应的PDCP SN。
方案II-2)如果RLC1实体判断I帧数据丢失,则RLC1实体通知PDCP1实体I帧数据丢失以及丢失的I帧数据对应的GOP标识,PDCP1实体通知PDCP2实体I帧数据丢失以及丢失的I帧数据对应的GOP标识;PDCP2实体丢弃GOP标识对应的B帧和/或P帧数据,PDCP2实体通知RLC2实体I帧数据丢失以及丢失的I帧数据对应的GOP标识;RLC2实体弃GOP标识对应的B帧和/或P帧数据。这里,PDCP2实体可以在给RLC2实体的通知中携带以下至少一种信息:PDCP SN列表、起始PDCP SN、终止PDCP SN、PDCP SN长度、GOP标识。这里,终止PDCP SN可以默认是PDCP实体递交给RLC2实体的最后一个数据对应的PDCP SN。
方案II-3)如果RLC1实体判断I帧数据丢失,则RLC1实体通知RLC2实体I帧数据丢失以及丢失的I帧数据对应的GOP标识;RLC2实体弃GOP标识对应的B帧和/或P帧数据。这里,RLC1实体可以在给RLC2实体的通知中携带以下至少一种信息:PDCP SN列表、起始PDCP SN、 终止PDCP SN、PDCP SN长度、GOP标识。这里,终止PDCP SN可以默认是PDCP实体递交给RLC2实体的最后一个数据对应的PDCP SN。
需要说明的是,图10-2所示的协议栈中,B帧和P帧可以共用一个RLC实体,或者,也可以B帧用一个RLC实体,P帧用另一个RLC实体,也就是说,图10-1所示的协议栈包括3个RLC实体。
在一些可选实施方式中,所述第一节点的PDCP层被配置了至少一个丢包定时器(discard timer),所述至少一个丢包定时器中的每个丢包定时器关联以下至少之一:帧类型、Qos属性、LCID。所述PDCP层基于接收到的数据的帧类型、Qos属性和LCID中的至少之一,确定所述数据对应的丢包定时器,并在接收到所述数据后启动所述数据对应的丢包定时器。
以下结合具体应用示例对上述方案进行举例说明。
应用示例五
网络侧通过RRC专用信令配置专用承载(即专用DRB),所述DRB包含一个PDCP实体和至少一个RLC实体。其中在PDCP实体的PDCP配置中,配置了至少一个丢包定时器,即PDCP层丢包定时器,每个丢包定时器关联一个帧类型和/或一个Qos属性和/或LCID。例如:配置2个丢包定时器,一个丢包定时器(时长较长)关联I帧,另一个丢包定时器(时长较短)关联B帧和/或P帧。例如:配置2个丢包定时器,一个丢包定时器关联Qos属性1,另一个丢包定时器关联Qos属性2。例如:配置2个丢包定时器,一个丢包定时器关联LCID1,另一个丢包定时器关联LCID2。以下表2-表4给出了丢包定时器的配置。PDCP层基于接收到的数据的帧类型、Qos属性和LCID中的至少之一,确定所述数据对应的丢包定时器,并在接收到所述数据后启动所述数据对应的丢包定时器。
Figure PCTCN2022088094-appb-000002
表2
Figure PCTCN2022088094-appb-000003
表3
Figure PCTCN2022088094-appb-000004
Figure PCTCN2022088094-appb-000005
表4
本申请实施例的技术方案,第一节点在确定GOP中的第一数据丢失的情况下,丢弃GOP中的第二数据,从而提高传输效率,降低不必要的数据传输。针对不同的数据包,根据帧类型、Qos属性和逻辑信道标识(LCID)中的至少之一,PDCP层采用不同的丢包定时器,从而提高数据的可靠性。
图11是本申请实施例提供的数据传输方法的流程示意图四,如图11所示,所述数据传输方法包括以下步骤:
步骤1101:第二节点向第一节点发送数据恢复指示,第一节点的PDCP层接收第二节点发送的数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
本申请实施例中,所述第一节点为发送端,所述第二节点为接收端,发送端可以向接收端发送数据。可选地,所述第一节点可以是网络设备(如基站),所述第二节点可以是终端设备。或者,所述第一节点可以是终端设备,所述第二节点可以是网络设备(如基站)。或者,所述第一节点可以是第一终端设备,所述第二节点可以是第二终端设备。
本申请实施例中,接收端可以触发部分数据恢复。具体地,接收端向发送端发送数据恢复指示,所述数据恢复指示用于触发发送端的PDCP层针对部分数据执行数据恢复。这里,可选地,部分数据可以是指特定帧类型的数据(如I帧数据)或者特定Qos属性的数据或者特定LCID的数据。例如:如果接收端的PDCP层判定I帧数据丢失(也即判定触发条件满足),则接收端可以触发发送端的PDCP实体执行针对帧数据的数据恢复。
在一些可选实施方式中,所述数据恢复指示承载在MAC CE或者DCI中。
在一些可选实施方式中,所述数据恢复指示包括所述部分数据关联的以下至少一种信息:DRB标识、GOP标识列表、PDU set标识列表、帧类型。
在一些可选实施方式中,所述数据恢复指示被发送的触发条件包括以下至少之一:
发生了CU内切换
基于RRC配置进行了RLC释放和添加;
RLC实体执行了RLC重建;
基于RRC配置进行了承载类型变更;
所述第二节点的PDCP层判定触发条件满足(如判定I帧数据丢失)。
这里,CU内切换(Intra-CU HO)可以理解为切换前后服务小区的集中单元(Centralized Unit,CU)不变,而分布单元(Distributed Unit,DU)改变。
这里,所述第二节点的PDCP层判定触发条件满足,可以有如下实现方式:
方式a:所述第二节点的PDCP层发送完数据恢复指示后启动第一定时器,并将最近一次接收到的PDCP SN设置为第一恢复PDCP SN;所述第一定时器超时时,若在第一PDCP SN范围内存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层判定触发条件满足;其中,所述第一PDCP SN范围包括所述第一恢复PDCP SN以及所述第一恢复PDCP SN之前的PDCP SN;或者,所述第一PDCP SN范围包括所述第一恢复PDCP SN和第二恢复PDCP SN之间的PDCP SN,所述第二恢复PDCP SN是所述第一定时器在上一次启动时对应的恢复PDCP SN。
方式b:若存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层启动第二定时器;所述第二定时器超时时,若依然存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层判定触发条件满足。
方式c:若存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层判定触发条件满足。
方式d:若存在未被所述第二节点的PDCP层接收到的PDCP SN且未被接收到的PDCP SN对应的数据属于第一帧类型对应的数据,则所述第二节点的PDCP层判定触发条件满足。这里,可选地,第一帧类型可以是I帧。
需要说明的是,PDCP SN是PDCP层对应的SN,每个数据具有一个PDCP SN,PDCP层接收到一个PDCP SN可以理解为PDCP层接收到一个具有PDCP SN的数据。
在一些可选实施方式中,所述第一节点的PDCP层接收第二节点发送的数据恢复指示之后,所述第一节点的PDCP层重新发送第一窗口内的第一数据,所述第一数据为第一帧类型对应的数据。这里,可选地,第一帧类型可以是I帧。
这里,可选地,所述第一窗口的终止SN为所述第一节点的PDCP层递交到RLC层的最近一个PDCP PDU的PDCP SN,所述第一窗口的长度通过RRC信令配置。
这里,可选地,所述第一窗口的长度为UE级别配置的或者PDCP级别配置的或者DRB级别配置的。
这里,可选地,所述第一窗口的长度通过PDCP SN数目表示或者通过时间表示或者通过时域单元数目表示。这里,时间例如可以是N秒或者毫秒等。时域单元例如可以是无线帧或者时隙或者符号等。进一步,所述时域单元为时隙的情况下,所述时隙的长度为参考子载波间隔(SCS)对应的时隙长度,所述参考SCS为RRC信令配置的SCS或者所述数据恢复指示所在的激活BWP的SCS。
本申请实施例的技术方案,由第二节点触发数据恢复,第一节点针对部分数据执行数据恢复,提高部分数据的可靠性。
以上结合附图详细描述了本申请的优选实施方式,但是,本申请并不限于上述实施方式中的具体细节,在本申请的技术构思范围内,可以对本申请的技术方案进行多种简单变型,这些简单变型均属于本申请的保护范围。例如,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本申请对各种可能的组合方式不再另行说明。又例如,本申请的各种不同的实施方式之间也可以进行任意组合,只要其不违背本申请的思想,其同样应当视为本申请所公开的内容。又例如,在不冲突的前提下,本申请描述的各个实施例和/或各个实施例中的技术特征可以和现有技术任意的相互组合,组合之后得到的技术方案也应落入本申请的保护范围。
还应理解,在本申请的各种方法实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本申请实施例的实施过程构成任何限定。此外,在本申请实施例中,术语“下行”、“上行”和“侧行”用于表示信号或数据的传输方向,其中,“下行”用于表示信号或数据的传输方向为从站点发送至小区的用户设备的第一方向,“上行”用于表示信号或数据的传输方向为从小区的用户设备发送至站点的第二方向,“侧行”用于表示信号或数据的传输方向为从用户设备1发送至用户设备2的第三方向。例如,“下行信号”表示该信号的传输方向为第一方向。另外,本申请实施例中,术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系。具体地,A和/或B可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
图12是本申请实施例提供的数据传输装置的结构组成示意图一,如图12所示,所述装置具有PDCP层1201和SDAP层1202;其中,
所述SDAP层1202,用于向PDCP层1201发送第一SDAP PDU;
所述PDCP层1201,用于接收SDAP层1202发送的第一SDAP PDU;所述第一SDAP PDU是下行SDAP控制PDU,其中,所述下行SDAP控制PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第一SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第一SDAP PDU关联的Qos流标识;
第三信息,所述第三信息用于指示所述第一SDAP PDU属于的控制PDU类型;
第四信息,所述第四信息用于指示所述第一SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第一SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第一SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第一SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第一SDAP PDU关联的PDU set中至少部分PDU的标识。
在一些可选实施方式中,所述PDCP层1201,还用于基于所述下行SDAP控制PDU识别以下至少一种信息:
具有关联关系的SDAP PDU或者SDAP业务数据单元SDU,所述关联关系是指属于同一个PDU set或者帧;
PDU set或者帧的帧类型;
PDU set或者帧或者PDU的Qos属性;
PDU set或者帧的标识;
PDU set或者帧所属的GOP的标识;
PDU set中至少部分PDU的标识。
在一些可选实施方式中,所述PDCP层1201,还用于基于所述下行SDAP控制PDU识别至少一种信息后,丢弃所述下行SDAP控制PDU。
在一些可选实施方式中,所述PDCP层1201,还用于接收所述SDAP层1202发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU,其中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
数据信息。
在一些可选实施方式中,所述PDCP层1201和所述SDAP层1202为网络设备的协议层;所述网络设备,用于确定下行SDAP数据PDU的格式为所述第一格式还是第二格式。
在一些可选实施方式中,所述网络设备,用于若所述网络设备接收到终端设备上报的第一能力信息,则确定下行SDAP数据PDU的格式为所述第一格式;若所述网络设备未接收到终端设备上报的第一能力信息,则确定下行SDAP数据PDU的格式为第二格式;其中,所述第一能力信息用于指示所述终端设备支持所述第一格式的下行SDAP数据PDU。
在一些可选实施方式中,所述网络设备,用于接收终端设备上报的第二能力信息;若所述第二能力信息指示所述终端设备支持第一能力,则确定下行SDAP数据PDU的格式为所述第一格式;若所述第二能力信息指示所述终端设备不支持第一能力,则确定下行SDAP数据PDU的格式为第二格式;其中,所述第一能力是指所述终端设备支持所述第一格式的下行SDAP数据PDU的能力;或者,所述第一能力是指所述终端设备支持第一协议版本的能力。
在一些可选实施方式中,所述网络设备,用于若终端设备被配置了目标类型业务,则确定下行SDAP数据PDU的格式为所述第一格式;若终端设备未被配置目标类型业务,则确定下行SDAP数据PDU的格式为第二格式。
在一些可选实施方式中,所述网络设备确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos 流或者终端设备全部Qos流。
在一些可选实施方式中,具有第二格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
数据信息。
本领域技术人员应当理解,本申请实施例的上述数据传输装置的相关描述可以参照本申请实施例的数据传输方法的相关描述进行理解。
图13是本申请实施例提供的数据传输装置的结构组成示意图二,应用于终端设备,如图13所示,所述数据传输装置包括:
接收单元1301,用于接收网络设备发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU,其中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
数据信息。
在一些可选实施方式中,所述接收单元1301,还用于接收所述网络设备发送的第一指示信息,所述第一指示信息用于指示所述终端设备是使用所述第一格式还是第二格式作为下行SDAP数据PDU的格式;
所述装置还包括:确定单元1302,用于基于所述第一指示信息,确定下行SDAP数据PDU的格式。
在一些可选实施方式中,所述第一指示信息为Qos流级别配置的或者DRB级别配置的或者PDU会话级别配置的或者UE级别配置的。
在一些可选实施方式中,所述第一指示信息通过RRC信令配置。
在一些可选实施方式中,所述装置还包括:确定单元1302,用于若所述终端设备向所述网络设备上报第一能力信息,则确定下行SDAP数据PDU的格式为所述第一格式;若所述终端设备未向所述网络设备上报第一能力信息,则确定下行SDAP数据PDU的格式为第二格式;其中,所述第一能力信息用于指示所述终端设备支持所述第一格式的下行SDAP数据PDU。
在一些可选实施方式中,所述装置还包括:上报单元,用于向所述网络设备上报第二能力信息;
确定单元1302,用于若所述第二能力信息指示所述终端设备支持第一能力,则确定下行SDAP数据PDU的格式为所述第一格式;若所述第二能力信息指示所述终端设备不支持第一能力,则确定下行SDAP数据PDU的格式为第二格式;其中,所述第一能力是指所述终端设备支持所述第一格式的下行SDAP数据PDU的能力;或者,所述第一能力是指所述终端设备支持第一协议版本的能力。
在一些可选实施方式中,所述装置还包括:确定单元1302,用于若所述终端设备被配置了目标类型业务,则确定下行SDAP数据PDU的格式为所述第一格式;若所述终端设备未被配置目标类型业务,则确定下行SDAP数据PDU的格式为第二格式。
在一些可选实施方式中,所述确定单元1302确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos流或者所述终端设备全部Qos流。
在一些可选实施方式中,具有第二格式的下行SDAP数据PDU包括以下至少一种信息:
第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
数据信息。
本领域技术人员应当理解,本申请实施例的上述数据传输装置的相关描述可以参照本申请实施例的数据传输方法的相关描述进行理解。
图14是本申请实施例提供的数据传输装置的结构组成示意图三,应用于第一节点,如图14所示,所述数据传输装置包括:
确定单元1401,用于确定GOP中的第一数据是否丢失;
丢弃单元1402,用于在确定GOP中的第一数据丢失的情况下,丢弃所述GOP中的第二数据;其中,所述第一数据为第一帧类型对应的数据,所述第二数据为第二帧类型对应的数据或者非第一帧类型对应数据。
在一些可选实施方式中,所述第一节点具有一个PDCP实体和两个RLC实体,所述两个RLC实体包括第一RLC实体和第二RLC实体,所述PDCP实体用于传输所述第一数据和所述第二数据,所述第一RLC实体用于传输所述第一数据,所述第二RLC实体用于传输所述第二数据。
在一些可选实施方式中,所述确定单元1401通过所述第一RLC实体确定GOP中的第一数据丢失的情况下,所述丢弃单元1402通知所述第二RLC实体丢弃所述GOP中的第二数据。
在一些可选实施方式中,所述通知的路径顺序为:
所述第一RLC实体通知到所述PDCP实体,所述PDCP实体通知到所述第二RLC实体;或者,
所述第一RLC实体通知到所述第二RLC实体。
在一些可选实施方式中,所述第一节点具有两个PDCP实体和两个RLC实体,所述两个PDCP实体包括第一PDCP实体和第二PDCP实体,所述两个RLC实体包括第一RLC实体和第二RLC实体,所述第一PDCP实体和所述第一RLC实体用于传输所述第一数据,所述第二PDCP实体和所述第二RLC实体用于传输所述第二数据。
在一些可选实施方式中,所述确定单元1401通过所述第一RLC实体确定GOP中的第一数据丢失的情况下,所述丢弃单元1402通知SDAP层、所述第二PDCP实体和所述第二RLC实体中的至少之一丢弃所述GOP中的第二数据。
在一些可选实施方式中,所述通知的路径顺序为:
所述第一RLC实体通知到所述第一PDCP实体,所述第一PDCP实体通知到SDAP层,所述SDAP层通知到所述第二PDCP实体,所述第二PDCP实体通知到所述第二RLC实体;或者,
所述第一RLC实体通知到所述第一PDCP实体,所述第一PDCP实体通知到所述第二PDCP实体,所述第二PDCP实体通知到所述第二RLC实体;或者,
所述第一RLC实体通知到所述第二RLC实体,所述第二RLC实体通知到所述第二PDCP实体,所述第二PDCP实体通知到SDAP层;或者,
所述第一RLC实体通知到所述第二RLC实体,所述第二RLC实体通知到所述第二PDCP实体;或者,
所述第一RLC实体通知到所述第二RLC实体。
在一些可选实施方式中,所述通知携带以下至少一种信息:
第二指示信息,所述第二指示信息用于指示GOP中的第一数据丢失;
GOP标识,所述GOP标识为丢失第一数据的GOP的标识;
PDCP SN列表,所述PDCP SN列表用于指示丢弃的一个或多个第二数据对应的PDCP SN;
起始PDCP SN,所述起始PDCP SN用于指示丢弃的起始第二数据对应的PDCP SN;
终止PDCP SN,所述终止PDCP SN用于指示丢弃的终止第二数据对应的PDCP SN;
PDCP SN长度,所述PDCP SN长度用于指示丢弃的一个或多个第二数据对应的PDCP SN个数。
在一些可选实施方式中,所述确定单元1401,还用于基于MAC层的指示,确定GOP中的第一数据是否丢失。
在一些可选实施方式中,所述MAC层通过RRC信令被配置了如下功能:所述MAC层在传输完数据并获取到针对该数据的ACK/NACK反馈信息后,基于该ACK/NACK反馈信息向RLC层指示该数据是否正确传输。
在一些可选实施方式中,所述MAC层被配置的功能按照LCID级别配置的。
在一些可选实施方式中,所述确定单元1401,还用于基于第二节点的RLC实体的ACK/NACK反馈,确定GOP中的第一数据是否丢失,所述第二节点为所述第一数据的接收端。
在一些可选实施方式中,所述第一节点的PDCP层被配置了至少一个丢包定时器,所述至少一个丢包定时器中的每个丢包定时器关联以下至少之一:帧类型、Qos属性、LCID。
在一些可选实施方式中,所述确定单元1401,还用于通过所述PDCP层基于接收到的数据的帧类型、Qos属性和LCID中的至少之一,确定所述数据对应的丢包定时器,并在接收到所述数据后启动所述数据对应的丢包定时器。
本领域技术人员应当理解,本申请实施例的上述数据传输装置的相关描述可以参照本申请实施例的数据传输方法的相关描述进行理解。
图15是本申请实施例提供的数据传输装置的结构组成示意图四,应用于第一节点,如图15所示,所述数据传输装置包括:
接收单元1501,用于接收第二节点发送的数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
在一些可选实施方式中,所述数据恢复指示包括所述部分数据关联的以下至少一种信息:DRB标识、GOP标识列表、PDU set标识列表、帧类型。
在一些可选实施方式中,所述数据恢复指示被发送的触发条件包括以下至少之一:
发生了CU内切换
基于RRC配置进行了RLC释放和添加;
RLC实体执行了RLC重建;
基于RRC配置进行了承载类型变更;
所述第二节点的PDCP层判定触发条件满足。
在一些可选实施方式中,所述装置还包括:发送单元1502,用于通过PDCP层重新发送第一窗口内的第一数据,所述第一数据为第一帧类型对应的数据。
在一些可选实施方式中,所述第一窗口的终止SN为所述第一节点的PDCP层递交到RLC层的最近一个PDCP PDU的PDCP SN,所述第一窗口的长度通过RRC信令配置。
在一些可选实施方式中,所述第一窗口的长度为UE级别配置的或者PDCP级别配置的或者DRB级别配置的。
在一些可选实施方式中,所述第一窗口的长度通过PDCP SN数目表示或者通过时间表示或者通过时域单元数目表示。
在一些可选实施方式中,所述时域单元为时隙的情况下,所述时隙的长度为参考SCS对应的时隙长度,所述参考SCS为RRC信令配置的SCS或者所述数据恢复指示所在的激活BWP的SCS。
在一些可选实施方式中,所述数据恢复指示承载在MAC CE或者DCI中。
本领域技术人员应当理解,本申请实施例的上述数据传输装置的相关描述可以参照本申请实施例的数据传输方法的相关描述进行理解。
图16是本申请实施例提供的数据传输装置的结构组成示意图五,应用于第二节点,如图16所示,所述数据传输装置包括:
发送单元1601,用于向第一节点发送数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
在一些可选实施方式中,所述数据恢复指示包括所述部分数据关联的以下至少一种信息:DRB标识、GOP标识列表、PDU set标识列表、帧类型。
在一些可选实施方式中,所述数据恢复指示被发送的触发条件包括以下至少之一:
发生了CU内切换
基于RRC配置进行了RLC释放和添加;
RLC实体执行了RLC重建;
基于RRC配置进行了承载类型变更;
所述第二节点的PDCP层判定触发条件满足。
在一些可选实施方式中,所述装置还包括:判定单元1602,用于通过PDCP层发送完数据恢复指示后启动第一定时器,并将最近一次接收到的PDCP SN设置为第一恢复PDCP SN;所述第一定时器超时时,若在第一PDCP SN范围内存在未被所述第二节点的PDCP层接收到的PDCP SN,则判定触发条件满足;其中,所述第一PDCP SN范围包括所述第一恢复PDCP SN以及所述第一恢复PDCP SN之前的PDCP SN;或者,所述第一PDCP SN范围包括所述第一恢复PDCP SN和 第二恢复PDCP SN之间的PDCP SN,所述第二恢复PDCP SN是所述第一定时器在上一次启动时对应的恢复PDCP SN。
在一些可选实施方式中,所述装置还包括:判定单元1602,用于若存在未被所述第二节点的PDCP层接收到的PDCP SN,则通过PDCP层启动第二定时器;所述第二定时器超时时,若依然存在未被所述第二节点的PDCP层接收到的PDCP SN,则判定触发条件满足。
在一些可选实施方式中,所述装置还包括:判定单元1602,用于若存在未被所述第二节点的PDCP层接收到的PDCP SN,则判定触发条件满足。
在一些可选实施方式中,所述装置还包括:判定单元1602,用于若存在未被所述第二节点的PDCP层接收到的PDCP SN且未被接收到的PDCP SN对应的数据属于第一帧类型对应的数据,则判定触发条件满足。
在一些可选实施方式中,所述数据恢复指示承载在MAC CE或者DCI中。
本领域技术人员应当理解,本申请实施例的上述数据传输装置的相关描述可以参照本申请实施例的数据传输方法的相关描述进行理解。
图17是本申请实施例提供的一种通信设备1700示意性结构图。该通信设备可以终端设备,也可以是网络设备。图17所示的通信设备1700包括处理器1710,处理器1710可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。
可选地,如图17所示,通信设备1700还可以包括存储器1720。其中,处理器1710可以从存储器1720中调用并运行计算机程序,以实现本申请实施例中的方法。
其中,存储器1720可以是独立于处理器1710的一个单独的器件,也可以集成在处理器1710中。
可选地,如图17所示,通信设备1700还可以包括收发器1730,处理器1710可以控制该收发器1730与其他设备进行通信,具体地,可以向其他设备发送信息或数据,或接收其他设备发送的信息或数据。
其中,收发器1730可以包括发射机和接收机。收发器1730还可以进一步包括天线,天线的数量可以为一个或多个。
可选地,该通信设备1700具体可为本申请实施例的网络设备,并且该通信设备1700可以实现本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该通信设备1700具体可为本申请实施例的移动终端/终端设备,并且该通信设备1700可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
图18是本申请实施例的芯片的示意性结构图。图18所示的芯片1800包括处理器1810,处理器1810可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。
可选地,如图18所示,芯片1800还可以包括存储器1820。其中,处理器1810可以从存储器1820中调用并运行计算机程序,以实现本申请实施例中的方法。
其中,存储器1820可以是独立于处理器1810的一个单独的器件,也可以集成在处理器1810中。
可选地,该芯片1800还可以包括输入接口1830。其中,处理器1810可以控制该输入接口1830与其他设备或芯片进行通信,具体地,可以获取其他设备或芯片发送的信息或数据。
可选地,该芯片1800还可以包括输出接口1840。其中,处理器1810可以控制该输出接口1840与其他设备或芯片进行通信,具体地,可以向其他设备或芯片输出信息或数据。
可选地,该芯片可应用于本申请实施例中的网络设备,并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该芯片可应用于本申请实施例中的移动终端/终端设备,并且该芯片可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
应理解,本申请实施例提到的芯片还可以称为系统级芯片,系统芯片,芯片系统或片上系统芯片等。
图19是本申请实施例提供的一种通信系统1900的示意性框图。如图19所示,该通信系统1900包括终端设备1910和网络设备1920。
其中,该终端设备1910可以用于实现上述方法中由终端设备实现的相应的功能,以及该网络设备1920可以用于实现上述方法中由网络设备实现的相应的功能为了简洁,在此不再赘述。
应理解,本申请实施例的处理器可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。 上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
可以理解,本申请实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解,上述存储器为示例性但不是限制性说明,例如,本申请实施例中的存储器还可以是静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synch link DRAM,SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)等等。也就是说,本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质,用于存储计算机程序。
可选的,该计算机可读存储介质可应用于本申请实施例中的网络设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机可读存储介质可应用于本申请实施例中的移动终端/终端设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
本申请实施例还提供了一种计算机程序产品,包括计算机程序指令。
可选的,该计算机程序产品可应用于本申请实施例中的网络设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机程序产品可应用于本申请实施例中的移动终端/终端设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的,该计算机程序可应用于本申请实施例中的网络设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机程序可应用于本申请实施例中的移动终端/终端设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,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,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,)ROM、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应所述以权利要求的保护范围为准。

Claims (65)

  1. 一种数据传输方法,所述方法包括:
    分组数据汇聚协议PDCP层接收业务数据适配协议SDAP层发送的第一SDAP分组数据单元PDU,所述第一SDAP PDU是下行SDAP控制PDU,其中,所述下行SDAP控制PDU包括以下至少一种信息:
    第一信息,所述第一信息用于指示所述第一SDAP PDU是数据PDU还是控制PDU;
    第二信息,所述第二信息用于指示所述第一SDAP PDU关联的服务质量Qos流标识;
    第三信息,所述第三信息用于指示所述第一SDAP PDU属于的控制PDU类型;
    第四信息,所述第四信息用于指示所述第一SDAP PDU关联的分组数据单元集PDU set或者帧对应的帧类型;
    第五信息,所述第五信息用于指示所述第一SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
    第六信息,所述第六信息用于指示所述第一SDAP PDU关联的PDU set或者帧的标识;
    第七信息,所述第七信息用于指示所述第一SDAP PDU关联的PDU set或者帧所属的GOP的标识;
    第八信息,所述第八信息用于指示所述第一SDAP PDU关联的PDU set中至少部分PDU的标识。
  2. 根据权利要求1所述的方法,其中,所述方法还包括:
    所述PDCP层基于所述下行SDAP控制PDU识别以下至少一种信息:
    具有关联关系的SDAP PDU或者SDAP业务数据单元SDU,所述关联关系是指属于同一个PDU set或者帧;
    PDU set或者帧的帧类型;
    PDU set或者帧或者PDU的Qos属性;
    PDU set或者帧的标识;
    PDU set或者帧所属的GOP的标识;
    PDU set中至少部分PDU的标识。
  3. 根据权利要求2所述的方法,其中,所述方法还包括:
    所述PDCP层基于所述下行SDAP控制PDU识别至少一种信息后,丢弃所述下行SDAP控制PDU。
  4. 根据权利要求1至3中任一项所述的方法,其中,所述方法还包括:
    所述PDCP层接收所述SDAP层发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU,其中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
    第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
    第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
    第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
    第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
    第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
    第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
    第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
    第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
    第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
    第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
    数据信息。
  5. 根据权利要求4所述的方法,其中,所述PDCP层和所述SDAP层为网络设备的协议层;所述方法还包括:
    所述网络设备确定下行SDAP数据PDU的格式为所述第一格式还是第二格式。
  6. 根据权利要求5所述的方法,其中,所述网络设备确定下行SDAP数据PDU的格式为所述第一格式还是第二格式,包括:
    若所述网络设备接收到终端设备上报的第一能力信息,则所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;
    若所述网络设备未接收到终端设备上报的第一能力信息,则所述网络设备确定下行SDAP数据PDU的格式为第二格式;
    其中,所述第一能力信息用于指示所述终端设备支持所述第一格式的下行SDAP数据PDU。
  7. 根据权利要求5所述的方法,其中,所述网络设备确定下行SDAP数据PDU的格式为所述第一格式还是第二格式,包括:
    所述网络设备接收终端设备上报的第二能力信息;
    若所述第二能力信息指示所述终端设备支持第一能力,则所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;
    若所述第二能力信息指示所述终端设备不支持第一能力,则所述网络设备确定下行SDAP数据PDU的格式为第二格式;
    其中,所述第一能力是指所述终端设备支持所述第一格式的下行SDAP数据PDU的能力;或者,所述第一能力是指所述终端设备支持第一协议版本的能力。
  8. 根据权利要求5所述的方法,其中,所述网络设备确定下行SDAP数据PDU的格式为所述第一格式还是第二格式,包括:
    若终端设备被配置了目标类型业务,则所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;
    若终端设备未被配置目标类型业务,则所述网络设备确定下行SDAP数据PDU的格式为第二格式。
  9. 根据权利要求5至8中任一项所述的方法,其中,网络设备确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos流或者终端设备全部Qos流。
  10. 根据权利要求5至9中任一项所述的方法,其中,具有第二格式的下行SDAP数据PDU包括以下至少一种信息:
    第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
    第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
    数据信息。
  11. 一种数据传输方法,所述方法包括:
    终端设备接收网络设备发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU,其中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
    第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
    第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
    第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
    第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
    第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
    第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
    第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
    第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
    第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
    第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
    数据信息。
  12. 根据权利要求11所述的方法,其中,所述方法还包括:
    所述终端设备接收所述网络设备发送的第一指示信息,所述第一指示信息用于指示所述终端设备是使用所述第一格式还是第二格式作为下行SDAP数据PDU的格式;
    所述终端设备基于所述第一指示信息,确定下行SDAP数据PDU的格式。
  13. 根据权利要求12所述的方法,其中,所述第一指示信息为Qos流级别配置的或者DRB级别配置的或者PDU会话级别配置的或者UE级别配置的。
  14. 根据权利要求12或13所述的方法,其中,所述第一指示信息通过RRC信令配置。
  15. 根据权利要求11至14中任一项所述的方法,其中,所述方法还包括:
    若所述终端设备向所述网络设备上报第一能力信息,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;
    若所述终端设备未向所述网络设备上报第一能力信息,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为第二格式;
    其中,所述第一能力信息用于指示所述终端设备支持所述第一格式的下行SDAP数据PDU。
  16. 根据权利要求11至14中任一项所述的方法,其中,所述方法还包括:
    所述终端设备向所述网络设备上报第二能力信息;
    若所述第二能力信息指示所述终端设备支持第一能力,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;
    若所述第二能力信息指示所述终端设备不支持第一能力,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为第二格式;
    其中,所述第一能力是指所述终端设备支持所述第一格式的下行SDAP数据PDU的能力;或者,所述第一能力是指所述终端设备支持第一协议版本的能力。
  17. 根据权利要求11至14中任一项所述的方法,其中,所述方法还包括:
    若所述终端设备被配置了目标类型业务,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式;
    若所述终端设备未被配置目标类型业务,则所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为第二格式。
  18. 根据权利要求12至17中任一项所述的方法,其中,所述终端设备和所述网络设备确定下行SDAP数据PDU的格式为所述第一格式的情况下,所述第一格式作为下行SDAP数据PDU的格式的应用范围为目标类型业务对应的Qos流或者所述终端设备全部Qos流。
  19. 根据权利要求12至18中任一项所述的方法,其中,具有第二格式的下行SDAP数据PDU包括以下至少一种信息:
    第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
    第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
    数据信息。
  20. 一种数据传输方法,所述方法包括:
    第一节点确定图像组GOP中的第一数据丢失的情况下,所述第一节点丢弃所述GOP中的第二数据;其中,所述第一数据为第一帧类型对应的数据,所述第二数据为第二帧类型对应的数据或者非第一帧类型对应数据。
  21. 根据权利要求20所述的方法,其中,所述第一节点具有一个PDCP实体和两个RLC实体,所述两个RLC实体包括第一RLC实体和第二RLC实体,所述PDCP实体用于传输所述第一数据和所述第二数据,所述第一RLC实体用于传输所述第一数据,所述第二RLC实体用于传输所述第二数据。
  22. 根据权利要求21所述的方法,其中,所述第一节点确定GOP中的第一数据丢失的情况下,所述第一节点丢弃所述GOP中的第二数据,包括:
    所述第一RLC实体确定GOP中的第一数据丢失的情况下,通知所述第二RLC实体丢弃所述GOP中的第二数据。
  23. 根据权利要求22所述的方法,其中,所述通知的路径顺序为:
    所述第一RLC实体通知到所述PDCP实体,所述PDCP实体通知到所述第二RLC实体;或者,
    所述第一RLC实体通知到所述第二RLC实体。
  24. 根据权利要求20所述的方法,其中,所述第一节点具有两个PDCP实体和两个RLC实体,所述两个PDCP实体包括第一PDCP实体和第二PDCP实体,所述两个RLC实体包括第一RLC实体和第二RLC实体,所述第一PDCP实体和所述第一RLC实体用于传输所述第一数据,所述第二PDCP实体和所述第二RLC实体用于传输所述第二数据。
  25. 根据权利要求24所述的方法,其中,所述第一节点确定GOP中的第一数据丢失的情况下,所述第一节点丢弃所述GOP中的第二数据,包括:
    所述第一RLC实体确定GOP中的第一数据丢失的情况下,通知SDAP层、所述第二PDCP实体和所述第二RLC实体中的至少之一丢弃所述GOP中的第二数据。
  26. 根据权利要求25所述的方法,其中,所述通知的路径顺序为:
    所述第一RLC实体通知到所述第一PDCP实体,所述第一PDCP实体通知到SDAP层,所述SDAP层通知到所述第二PDCP实体,所述第二PDCP实体通知到所述第二RLC实体;或者,
    所述第一RLC实体通知到所述第一PDCP实体,所述第一PDCP实体通知到所述第二PDCP实体,所述第二PDCP实体通知到所述第二RLC实体;或者,
    所述第一RLC实体通知到所述第二RLC实体,所述第二RLC实体通知到所述第二PDCP实体,所述第二PDCP实体通知到SDAP层;或者,
    所述第一RLC实体通知到所述第二RLC实体,所述第二RLC实体通知到所述第二PDCP实体;或者,
    所述第一RLC实体通知到所述第二RLC实体。
  27. 根据权利要求22、23、25、26中任一项所述的方法,其中,所述通知携带以下至少一种信息:
    第二指示信息,所述第二指示信息用于指示GOP中的第一数据丢失;
    GOP标识,所述GOP标识为丢失第一数据的GOP的标识;
    PDCP SN列表,所述PDCP SN列表用于指示丢弃的一个或多个第二数据对应的PDCP SN;
    起始PDCP SN,所述起始PDCP SN用于指示丢弃的起始第二数据对应的PDCP SN;
    终止PDCP SN,所述终止PDCP SN用于指示丢弃的终止第二数据对应的PDCP SN;
    PDCP SN长度,所述PDCP SN长度用于指示丢弃的一个或多个第二数据对应的PDCP SN个数。
  28. 根据权利要求22至27中任一项所述的方法,其中,所述方法还包括:
    所述第一RLC实体基于MAC层的指示,确定GOP中的第一数据是否丢失。
  29. 根据权利要求28所述的方法,其中,所述MAC层通过RRC信令被配置了如下功能:所述MAC层在传输完数据并获取到针对该数据的ACK/NACK反馈信息后,基于该ACK/NACK反馈信息向RLC层指示该数据是否正确传输。
  30. 根据权利要求29所述的方法,其中,所述MAC层被配置的功能按照LCID级别配置的。
  31. 根据权利要求22至27中任一项所所述的方法,其中,所述方法还包括:
    所述第一RLC实体基于第二节点的RLC实体的ACK/NACK反馈,确定GOP中的第一数据是否丢失,所述第二节点为所述第一数据的接收端。
  32. 根据权利要求20至31中任一项所所述的方法,其中,所述第一节点的PDCP层被配置了至少一个丢包定时器,所述至少一个丢包定时器中的每个丢包定时器关联以下至少之一:帧类型、Qos属性、LCID。
  33. 根据权利要求32所所述的方法,其中,所述方法还包括:
    所述PDCP层基于接收到的数据的帧类型、Qos属性和LCID中的至少之一,确定所述数据对应的丢包定时器,并在接收到所述数据后启动所述数据对应的丢包定时器。
  34. 一种数据传输方法,所述方法包括:
    第一节点的PDCP层接收第二节点发送的数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
  35. 根据权利要求34所述的方法,其中,所述数据恢复指示包括所述部分数据关联的以下至少一种信息:DRB标识、GOP标识列表、PDU set标识列表、帧类型。
  36. 根据权利要求34或35所述的方法,其中,所述数据恢复指示被发送的触发条件包括以下至少之一:
    发生了CU内切换
    基于RRC配置进行了RLC释放和添加;
    RLC实体执行了RLC重建;
    基于RRC配置进行了承载类型变更;
    所述第二节点的PDCP层判定触发条件满足。
  37. 根据权利要求36所述的方法,其中,所述第二节点的PDCP层判定触发条件满足,包 括:
    所述第二节点的PDCP层发送完数据恢复指示后启动第一定时器,并将最近一次接收到的PDCP SN设置为第一恢复PDCP SN;所述第一定时器超时时,若在第一PDCP SN范围内存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层判定触发条件满足;其中,所述第一PDCP SN范围包括所述第一恢复PDCP SN以及所述第一恢复PDCP SN之前的PDCP SN;或者,所述第一PDCP SN范围包括所述第一恢复PDCP SN和第二恢复PDCP SN之间的PDCP SN,所述第二恢复PDCP SN是所述第一定时器在上一次启动时对应的恢复PDCP SN。
  38. 根据权利要求36所述的方法,其中,所述第二节点的PDCP层判定触发条件满足,包括:
    若存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层启动第二定时器;所述第二定时器超时时,若依然存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层判定触发条件满足。
  39. 根据权利要求36所述的方法,其中,所述第二节点的PDCP层判定触发条件满足,包括:
    若存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层判定触发条件满足。
  40. 根据权利要求36所述的方法,其中,所述第二节点的PDCP层判定触发条件满足,包括:
    若存在未被所述第二节点的PDCP层接收到的PDCP SN且未被接收到的PDCP SN对应的数据属于第一帧类型对应的数据,则所述第二节点的PDCP层判定触发条件满足。
  41. 根据权利要求32至40中任一项所述的方法,其中,所述第一节点的PDCP层接收第二节点发送的数据恢复指示之后,所述方法还包括:
    所述第一节点的PDCP层重新发送第一窗口内的第一数据,所述第一数据为第一帧类型对应的数据。
  42. 根据权利要求41所述的方法,其中,所述第一窗口的终止SN为所述第一节点的PDCP层递交到RLC层的最近一个PDCP PDU的PDCP SN,所述第一窗口的长度通过RRC信令配置。
  43. 根据权利要求42所述的方法,其中,所述第一窗口的长度为UE级别配置的或者PDCP级别配置的或者DRB级别配置的。
  44. 根据权利要求42或43所述的方法,其中,所述第一窗口的长度通过PDCP SN数目表示或者通过时间表示或者通过时域单元数目表示。
  45. 根据权利要求44所述的方法,其中,所述时域单元为时隙的情况下,所述时隙的长度为参考SCS对应的时隙长度,所述参考SCS为RRC信令配置的SCS或者所述数据恢复指示所在的激活BWP的SCS。
  46. 根据权利要求34至45中任一项所述的方法,其中,所述数据恢复指示承载在MAC CE或者DCI中。
  47. 一种数据传输方法,所述方法包括:
    第二节点向第一节点发送数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
  48. 根据权利要求47所述的方法,其中,所述数据恢复指示包括所述部分数据关联的以下至少一种信息:DRB标识、GOP标识列表、PDU set标识列表、帧类型。
  49. 根据权利要求47或48所述的方法,其中,所述数据恢复指示被发送的触发条件包括以下至少之一:
    发生了CU内切换
    基于RRC配置进行了RLC释放和添加;
    RLC实体执行了RLC重建;
    基于RRC配置进行了承载类型变更;
    所述第二节点的PDCP层判定触发条件满足。
  50. 根据权利要求49所述的方法,其中,所述第二节点的PDCP层判定触发条件满足,包括:
    所述第二节点的PDCP层发送完数据恢复指示后启动第一定时器,并将最近一次接收到的PDCP SN设置为第一恢复PDCP SN;所述第一定时器超时时,若在第一PDCP SN范围内存在未 被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层判定触发条件满足;其中,所述第一PDCP SN范围包括所述第一恢复PDCP SN以及所述第一恢复PDCP SN之前的PDCP SN;或者,所述第一PDCP SN范围包括所述第一恢复PDCP SN和第二恢复PDCP SN之间的PDCP SN,所述第二恢复PDCP SN是所述第一定时器在上一次启动时对应的恢复PDCP SN。
  51. 根据权利要求49所述的方法,其中,所述第二节点的PDCP层判定触发条件满足,包括:
    若存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层启动第二定时器;所述第二定时器超时时,若依然存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层判定触发条件满足。
  52. 根据权利要求49所述的方法,其中,所述第二节点的PDCP层判定触发条件满足,包括:
    若存在未被所述第二节点的PDCP层接收到的PDCP SN,则所述第二节点的PDCP层判定触发条件满足。
  53. 根据权利要求49所述的方法,其中,所述第二节点的PDCP层判定触发条件满足,包括:
    若存在未被所述第二节点的PDCP层接收到的PDCP SN且未被接收到的PDCP SN对应的数据属于第一帧类型对应的数据,则所述第二节点的PDCP层判定触发条件满足。
  54. 根据权利要求47至53中任一项所述的方法,其中,所述数据恢复指示承载在MAC CE或者DCI中。
  55. 一种数据传输装置,所述装置具有PDCP层和SDAP层;
    所述SDAP层,用于向PDCP层发送第一SDAP PDU;
    所述PDCP层,用于接收SDAP层发送的第一SDAP PDU;所述第一SDAP PDU是下行SDAP控制PDU,其中,所述下行SDAP控制PDU包括以下至少一种信息:
    第一信息,所述第一信息用于指示所述第一SDAP PDU是数据PDU还是控制PDU;
    第二信息,所述第二信息用于指示所述第一SDAP PDU关联的Qos流标识;
    第三信息,所述第三信息用于指示所述第一SDAP PDU属于的控制PDU类型;
    第四信息,所述第四信息用于指示所述第一SDAP PDU关联的PDU set或者帧对应的帧类型;
    第五信息,所述第五信息用于指示所述第一SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
    第六信息,所述第六信息用于指示所述第一SDAP PDU关联的PDU set或者帧的标识;
    第七信息,所述第七信息用于指示所述第一SDAP PDU关联的PDU set或者帧所属的GOP的标识;
    第八信息,所述第八信息用于指示所述第一SDAP PDU关联的PDU set中至少部分PDU的标识。
  56. 根据权利要求55所述的装置,其中,
    所述SDAP层,还用于向PDCP层发送第二SDAP PDU;
    所述PDCP层,还用于接收所述SDAP层发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU,其中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
    第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
    第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
    第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
    第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
    第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
    第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
    第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
    第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
    第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
    第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
    数据信息。
  57. 一种数据传输装置,应用于终端设备,所述装置包括:
    接收单元,用于接收网络设备发送的第二SDAP PDU,所述第二SDAP PDU是下行SDAP数据PDU,其中,具有第一格式的下行SDAP数据PDU包括以下至少一种信息:
    第一信息,所述第一信息用于指示所述第二SDAP PDU是数据PDU还是控制PDU;
    第二信息,所述第二信息用于指示所述第二SDAP PDU关联的Qos流标识;
    第三信息,所述第三信息用于指示所述第二SDAP PDU属于的数据PDU类型;
    第四信息,所述第四信息用于指示所述第二SDAP PDU关联的PDU set或者帧对应的帧类型;
    第五信息,所述第五信息用于指示所述第二SDAP PDU关联的PDU set或者帧或者PDU的Qos属性;
    第六信息,所述第六信息用于指示所述第二SDAP PDU关联的PDU set或者帧的标识;
    第七信息,所述第七信息用于指示所述第二SDAP PDU关联的PDU set或者帧所属的GOP的标识;
    第八信息,所述第八信息用于指示所述第二SDAP PDU关联的PDU set中至少部分PDU的标识;
    第九信息,所述第九信息用于指示所述第二SDAP PDU对应的RDI;
    第十信息,所述第十信息用于指示所述第二SDAP PDU对应的RQI;
    数据信息。
  58. 一种数据传输装置,应用于第一节点,所述装置包括:
    确定单元,用于确定GOP中的第一数据是否丢失;
    丢弃单元,用于在确定GOP中的第一数据丢失的情况下,丢弃所述GOP中的第二数据;其中,所述第一数据为第一帧类型对应的数据,所述第二数据为第二帧类型对应的数据或者非第一帧类型对应数据。
  59. 一种数据传输装置,应用于第一节点,所述装置包括:
    接收单元,用于接收第二节点发送的数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
  60. 一种数据传输装置,应用于第二节点,所述装置包括:
    发送单元,用于向第一节点发送数据恢复指示,所述数据恢复指示用于触发所述第一节点的PDCP层针对部分数据执行数据恢复。
  61. 一种通信设备,包括:处理器和存储器,该存储器用于存储计算机程序,所述处理器用于调用并运行所述存储器中存储的计算机程序,执行如权利要求1至10中任一项所述的方法,或者权利要求11至19中任一项所述的方法,或者权利要求20至33中任一项所述的方法,或者权利要求34至46中任一项所述的方法,或者权利要求47至54中任一项所述的方法。
  62. 一种芯片,包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有所述芯片的设备执行如权利要求1至10中任一项所述的方法,或者权利要求11至19中任一项所述的方法,或者权利要求20至33中任一项所述的方法,或者权利要求34至46中任一项所述的方法,或者权利要求47至54中任一项所述的方法。
  63. 一种计算机可读存储介质,用于存储计算机程序,所述计算机程序使得计算机执行如权利要求1至10中任一项所述的方法,或者权利要求11至19中任一项所述的方法,或者权利要求20至33中任一项所述的方法,或者权利要求34至46中任一项所述的方法,或者权利要求47至54中任一项所述的方法。
  64. 一种计算机程序产品,包括计算机程序指令,该计算机程序指令使得计算机执行如权利要求1至10中任一项所述的方法,或者权利要求11至19中任一项所述的方法,或者权利要求20至33中任一项所述的方法,或者权利要求34至46中任一项所述的方法,或者权利要求47至54中任一项所述的方法。
  65. 一种计算机程序,所述计算机程序使得计算机执行如权利要求1至10中任一项所述的方法,或者权利要求11至19中任一项所述的方法,或者权利要求20至33中任一项所述的方法,或者权利要求34至46中任一项所述的方法,或者权利要求47至54中任一项所述的方法。
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