WO2024017395A1 - 数据处理方法、装置及通信设备 - Google Patents

数据处理方法、装置及通信设备 Download PDF

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Publication number
WO2024017395A1
WO2024017395A1 PCT/CN2023/108995 CN2023108995W WO2024017395A1 WO 2024017395 A1 WO2024017395 A1 WO 2024017395A1 CN 2023108995 W CN2023108995 W CN 2023108995W WO 2024017395 A1 WO2024017395 A1 WO 2024017395A1
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Prior art keywords
data
discarding
data packet
frame
pdu
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PCT/CN2023/108995
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English (en)
French (fr)
Inventor
温金辉
郑康
刘亮
刘康怡
Original Assignee
中国移动通信有限公司研究院
中国移动通信集团有限公司
中国移动紫金(江苏)创新研究院有限公司
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Publication of WO2024017395A1 publication Critical patent/WO2024017395A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64784Data processing by the network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64784Data processing by the network
    • H04N21/64792Controlling the complexity of the content stream, e.g. by dropping packets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control

Definitions

  • the present disclosure relates to the field of Packet Data Convergence Protocol (PDCP) data processing technology, and in particular to a data processing method, device and communication equipment.
  • PDCP Packet Data Convergence Protocol
  • Extended Reality Once the data packet is lost or the delay budget is exceeded at the sending end, the integrity of the transmitted video stream or video frame cannot be achieved, and the receiving end cannot decode the video stream or video frame.
  • the purpose of this disclosure is to provide a data processing method, device and communication equipment that can ensure the integrity of the transmitted video stream or video frame at the sending end, thereby enabling the receiving end to decode the video stream or video frame.
  • the present disclosure provides a data processing method, which is executed by a communication device, and the communication device serves as a PDCP sending end.
  • the method includes:
  • the data packets in the PDU group are data packets in the same video stream or data packets in the same video frame;
  • the first discarding strategy includes discarding the Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU) corresponding to the key data packet and its corresponding PDCP data. (Data) PDU, and discard the PDCP SDU and its corresponding PDCP Data PDU that are not transmitted in the PDU group and correspond to the data packet associated with the key data packet;
  • PDCP Packet Data Convergence Protocol
  • SDU Service Data Unit
  • the second discarding strategy includes discarding the PDCP SDU corresponding to the key data packet when the data packets in the PDU group meet the preset discarding conditions.
  • the key data package includes one of the following:
  • the first forward prediction encoded frame P frame in the video stream wherein the data packets after the first P frame depend on the first P frame for decoding;
  • the first forward prediction encoding slice P slice in the video frame wherein the data packet after the first P slice depends on the first P slice for decoding
  • the first IP data packet in the video frame is any IP data packet among multiple IP data packets in the video frame.
  • the data packets associated with the key data packets include one of the following:
  • the preset discarding conditions include one of the following:
  • the PDCP SDU corresponding to the key data packet is successfully sent
  • the method further includes:
  • the PDCP SDU discarding policy is received through a Radio Resource Control (Radio Resource Control, RRC) message.
  • RRC Radio Resource Control
  • the method also includes:
  • the first indication information is used to indicate the key data packets in the PDU group and the data packets associated with the key data packets, the PDCP SDU discarding policy Determined based on the first indication information.
  • the present disclosure also provides a data processing device, including:
  • the first data processing module is used to discard the data packets in the PDU group according to the first discarding strategy and/or the second discarding strategy when the key data packets in the PDU group of a protocol data unit are lost or exceed the delay budget.
  • the data packets in the PDU group are data packets in the same video stream or data packets in the same video frame;
  • the first discarding strategy includes discarding the packet data convergence protocol service data unit PDCP SDU corresponding to the key data packet and its corresponding PDCP Data PDU, and discarding the untransmitted PDU group and the key data The PDCP SDU corresponding to the data packet associated with the package and its corresponding PDCP Data PDU;
  • the second discarding strategy includes discarding the PDCP SDU corresponding to the key data packet when the data packets in the PDU group meet the preset discarding conditions.
  • the present disclosure also provides a communication device.
  • the communication device includes a processor and a transceiver.
  • the transceiver receives and sends data under the control of the processor.
  • the processor is configured to perform the following operations:
  • the data packets in the PDU group are discarded according to the first discarding strategy and/or the second discarding strategy.
  • the data packets are data packets in the same video stream or data packets in the same video frame;
  • the first discarding strategy includes discarding the packet data convergence protocol service data unit PDCP SDU corresponding to the key data packet and its corresponding PDCP Data PDU, and discarding the untransmitted PDU group and the key data The PDCP SDU corresponding to the data packet associated with the package and its corresponding PDCP Data PDU;
  • the second discarding strategy includes discarding the PDCP SDU corresponding to the key data packet when the data packets in the PDU group meet the preset discarding conditions.
  • the key data package includes one of the following:
  • the first forward prediction encoded frame P frame in the video stream wherein the data packets after the first P frame depend on the first P frame for decoding;
  • the first forward prediction encoding slice P slice in the video frame wherein the data packet after the first P slice depends on the first P slice for decoding
  • the first IP data packet in the video frame is any IP data packet among multiple IP data packets in the video frame.
  • the data packets associated with the key data packets include one of the following:
  • the preset discarding conditions include one of the following:
  • the PDCP SDU corresponding to the key data packet is successfully sent
  • the transceiver is also used for:
  • the PDCP SDU discarding policy sent by the network side device is received, and the PDCP SDU discarding policy includes a first discarding policy and/or a second discarding policy.
  • the PDCP SDU discarding policy is received through a radio resource control RRC message.
  • the transceiver is also used for:
  • the first indication information is used to indicate the key data packets in the PDU group and the data packets associated with the key data packets, the PDCP SDU discarding policy Determined based on the first indication information.
  • the present disclosure also provides a communication device.
  • the communication device includes a memory, a processor, and a program stored on the memory and executable on the processor; the processor executes the program When implementing the data processing method as described above.
  • the present disclosure also provides a computer-readable storage medium having a computer program stored thereon, wherein, When the program is executed by the processor, the steps in the data processing method described above are implemented.
  • the data packets in the PDU group are discarded according to the first discarding strategy and/or the second discarding strategy.
  • the data packets in the PDU group are data packets in the same video stream or data packets in the same video frame
  • the first discarding strategy includes discarding the Packet Data Convergence Protocol Service Data Unit PDCP SDU corresponding to the key data packet and its corresponding PDCP Data PDU, and discard the PDCP SDU corresponding to the untransmitted data packets in the PDU group and associated with the key data packets and their corresponding PDCP Data PDU
  • the second discarding policy includes data packets in the PDU group that satisfy When the discard condition is preset, the PDCP SDU corresponding to the key data packet is discarded.
  • Figure 1 shows a schematic flow chart of a data processing method according to an embodiment of the present disclosure
  • Figure 2 shows an intuitive operational schematic diagram of the data processing method in the example of the present disclosure
  • Figure 3 shows a module schematic diagram of a data processing device according to an embodiment of the present disclosure
  • Figure 4 shows a schematic structural diagram of a communication device according to an embodiment of the present disclosure.
  • a slice-based model and a Group of Pictures (GOP)-based model.
  • GOP Group of Pictures
  • N slices a single video frame is divided into N slices.
  • N slices here called a slice group
  • 1 slice is an I slice
  • the remaining N-1 slices are P slices.
  • N packets one I packet and N-1 P packets
  • a single video frame is an intra-frame (I-frame, I-frame) or a forward prediction-coded frame (P-frame, P-frame).
  • I frames are transmitted every K frames, where K is the GOP size.
  • K is the GOP size.
  • One video frame arrives as one packet at a time.
  • the I frame is a key frame, which corresponds to the complete preservation of one frame of picture. Only the data of this frame is required for decoding.
  • the P frame is a difference frame. The P frame does not have complete picture data, but only the difference data from the previous frame (I frame or P frame). When decoding, the previously buffered picture needs to be superimposed with the difference defined by this frame to generate the final picture.
  • packets within such a slice group or GOP should be decoded/processed as a whole.
  • a frame or video slice can only be decoded if all packets carrying the frame or video slice are successfully transmitted.
  • the client can only decode if all frames on which a certain frame depends are successfully received.
  • the present disclosure provides a data processing method, device and communication equipment.
  • FIG. 1 it is a schematic flow chart of a data processing method provided by an embodiment of the present disclosure.
  • the method is executed by a communication device, and the communication device serves as a PDCP sending end.
  • the communication device at the PDCP sending end can be a terminal or a base station. If the communication device is a terminal, the data transmission is sent from the terminal to the base station. If the communication device is a base station, the data transmission is sent from the base station to the terminal.
  • the method may specifically include the following steps:
  • Step 101 When a key data packet in a protocol data unit PDU group is lost or exceeds the delay budget, the data packets in the PDU group are discarded according to the first discarding policy and/or the second discarding policy.
  • the data packets are data packets in the same video stream or data packets in the same video frame;
  • the first discarding strategy includes discarding the Packet Data Convergence Protocol Service Data Unit PDCP SDU corresponding to the key data packet and its corresponding PDCP Data PDU, and discarding the untransmitted data packets in the PDU group and associated with the key data packet.
  • the second discarding strategy includes discarding the PDCP SDU corresponding to the key data packet when the data packets in the PDU group meet the preset discarding conditions.
  • the delay budget is used to identify the maximum delay allowed for data transmission.
  • the delay budget may be a packet delay budget (Packet Delay Budget, PDB).
  • the delay budget can be expressed by the length of the discard timer (discardTimer).
  • the Packet Data Convergence Protocol (PDCP) service data unit (Service Data Unit, SDU) corresponding to the data packet carries the data packet.
  • PDCP Packet Data Convergence Protocol
  • SDU Service Data Unit
  • the data packets in the same video stream are video frames in the same GOP, and one video frame is regarded as one data packet.
  • Data packets in the same video frame are slices in the same slice group, and one slice is a data packet.
  • One video frame is divided into N slices, and the N slices are called a slice group; or, in the same video frame,
  • the data packets are IP data packets in the same video frame.
  • PDCP SDU discarding is the behavior of the PDCP sender.
  • Each PDCP SDU corresponds to a discardTimer.
  • the PDCP sending entity will start the discardTimer for the PDCP SDU. Once started, the discardTimer will continue to run until it times out. It should be noted that each PDCP SDU can only stay in the transmission buffer for the duration of discardTimer (this duration can be configured by the PDCP entity). If discardTimer times out, it means that the PDCP SDU has no is successfully sent.
  • the existing handling method is to discard the PDCP SDU and its corresponding PDCP Data PDU. If the corresponding PDCP Data PDU has been submitted to the Radio Link Control (RLC) layer, the RLC layer is instructed to discard the corresponding data.
  • RLC Radio Link Control
  • the PDCP sending entity will continue to try to send, and these data packets are useless to the receiving end because they only belong to a whole (such as the same video stream or the same Only when all the data packets of the video frame) are successfully transmitted can the whole be decoded.
  • the existing processing method not only fails to achieve the integrity of the transmitted video stream or video frame, but also wastes wireless resources.
  • discardTimer is configured by the RRC layer, and its value depends on the delay requirements of the radio bearer.
  • Timer-based PDCP SDU discarding is only applicable to data radio bearer (Data Radio Bearer, DRB).
  • Signaling Radio Bearer (SRB) does not support timer-based PDCP SDU discarding.
  • Data from the core network or terminal application layer will exist in the form of PDU sets (for example, data packets belonging to the same slice group or the same GOP belong to the same PDU set), and data from the core network or UE application layer
  • the packet carries the PDU set sequence number (Sequence Number, SN), the SN information of the data packet in the PDU set and/or the information of whether the data packet is a key data packet (such as an I frame) or a necessary data packet.
  • the first discarding strategy or the second discarding strategy is used to discard the packets in the PDU group.
  • the data packets are discarded. It should be noted that the key data packet is the first data packet.
  • the data packets in the PDU group are discarded according to the first discarding policy, that is, the PDCP SDU corresponding to the key data packets and their corresponding PDCP Data PDU, and discard the PDCP SDU corresponding to the data packet that is not transmitted in the PDU group and is associated with the key data packet and its corresponding PDCP Data PDU. That is to say, the process discards the PDCP SDU corresponding to the key data packet that exceeds the delay budget and its corresponding PDCP Data PDU, and also discards the data packet corresponding to the key data packet.
  • PDCP SDU and its corresponding PDCP Data PDU that is, discarding other data packets that are useless to the receiving end, that is, discarding incomplete video streams or video frames. This not only saves wireless resources, but also Achieve the purpose of transmitting only the complete video stream or video frame.
  • the data packet associated with the key data packet means that the decoding of the data packet depends on the key data packet.
  • the key data packet is one of the following:
  • the first forward prediction encoded frame P frame in the video stream wherein the data packets after the first P frame depend on the first P frame for decoding;
  • the first forward prediction coding slice P slice in the video frame wherein the data packets after the first P slice depend on the first P slice for decoding
  • the first IP data packet in the video frame is any IP data packet among multiple IP data packets in the video frame.
  • the key data packet belongs to the data packet in the same GOP, the key data packet is the I frame in the GOP or the first P frame in the GOP.
  • the key data packet belongs to the data packet in the same slice group, the key data packet is the I slice in the slice group or the first P slice in the slice group.
  • the key data packet belongs to an IP data packet in the same video frame
  • the key data packet is the first IP data packet of the video frame, where the first IP data packet is any one of multiple IP data packets in the video frame.
  • data packets associated with the key data packets include one of the following:
  • the data packet associated with the key data packet includes all P frames after the I frame in the GOP, or the first P frame in the GOP All P frames after.
  • the data packet associated with the key data packet includes all P slices after the I slice in the slice group, or all P slices after the first P slice in the slice group. .
  • the data packets associated with the key data packet include all IP data packets in the video frame except the first IP data packet.
  • the method in the embodiment of the present disclosure may also include:
  • the PDCP layer of the communication device determines that the first PDCP Data PDU has been submitted to the RLC layer, it sends the second indication information to the RLC layer.
  • the second indication information is used to instruct the RLC layer to discard the first PDCP Data PDU, where the first PDCP Data
  • the PDU is the PDCP Data PDU corresponding to the PDCP SDU corresponding to the key data packet, or the PDCP Data PDU corresponding to the PDCP SDU corresponding to the data packet associated with the key data packet.
  • This implementation ensures that packets are discarded at the sending end.
  • the data packets in the PDU group are discarded according to the first discarding policy. That is, key data packets in a PDU group are lost, and the video stream or video frame to be transmitted by the communication device is already incomplete. Therefore, the data packets in the PDU group are discarded according to the first discarding policy, and the incomplete video is discarded. streams or video frames, which not only saves wireless resources, but also achieves the purpose of transmitting only complete video streams or video frames.
  • the key data packet loss may be that the key data packet from the core network is not received.
  • the above situation of discarding the data packets in the PDU group according to the first discarding policy can also be understood as, when the key data packets in a PDU group are lost or discarded due to exceeding the delay budget, the data packets in the same PDU group will be discarded. Other packets associated with this critical packet are also dropped.
  • the preset discard conditions includes one of the following:
  • the PDCP SDU corresponding to the key data packet is successfully sent
  • the preset discard condition is that the PDCP SDU corresponding to the key data packet is successfully sent, it means that the PDCP SDU corresponding to the key data packet no longer needs to be saved in the transmission buffer, so the PDCP SDU corresponding to the key data packet is discarded at this time.
  • the preset discard condition is that all data packets in the PDU group are successfully sent, it means that the same video stream or video frame in the PDU group as a whole can be decoded by the receiving end. At this time, there is no need to save key data packets in the transmission buffer. Corresponding PDCP SDU, so discard the PDCP SDU corresponding to the key packet.
  • the preset discard condition is that all data packets in the PDU group exceed their corresponding delay budget, that is, the discardTime of the corresponding PDU SDU carrying all data packets in the PDU group times out, indicating that all data packets in the PDU group are within None of the corresponding delay budgets were successfully sent, indicating that the same video stream or video frame in the entire PDU group will not be decoded by the receiving end.
  • the PDCP SDU corresponding to the key data packet no longer needs to be saved in the transmission buffer. , so the PDCP SDU corresponding to the key data packet is discarded.
  • the second discarding strategy can be understood as a delayed discarding of the PDCP SDU corresponding to the key data packet, that is, only when the data packets in the PDU group meet the above preset discarding conditions, the PDCP SDU corresponding to the key data packet will be discarded to ensure that Critical data packets can be stored in the cache for a longer period of time, thereby ensuring the decoding of subsequent data packets within the same PDU group.
  • the policy also includes when a PDCP SDU corresponds to a non-critical data packet or the bearer is a non-critical data packet of the PDU group. Necessary data packet, and the data packet exceeds the corresponding delay budget, the communication device discards the PDCP SDU corresponding to the data packet and its corresponding PDCP Data PDU. If the corresponding PDCP Data PDU has been submitted to the RLC layer, the RLC layer is instructed to discard the corresponding data.
  • the method of the embodiment of the present disclosure may further include:
  • the PDCP SDU discarding policy includes a first discarding policy and/or a second discarding policy.
  • the network side device is a base station.
  • the network side device will configure the PDCP SDU discard policy for the terminal to instruct the terminal to perform discard processing on the corresponding data packet according to the PDCP SDU discard policy.
  • the PDCP SDU discard policy is received through Radio Resource Control RRC messages. This can also be understood as: receiving the RRC message sent by the network side, and the RRC message carries the PDCP SDU discarding policy.
  • the PDCP SDU discarding policy of the communication device serving as the PDCP sender of the DRB can be specified through RRC configuration.
  • the RRC message includes a PDCP-Config configuration, and a first parameter is added to the PDCP-Config configuration.
  • the first parameter is used to indicate the PDCP SDU discarding policy.
  • the first parameter can be expressed as enumeration (ENUMERATED) ⁇ value (value) 1, value 2 ⁇ .
  • ENUMERATED enumeration
  • the PDCP SDU corresponding to the key data packet (or necessary data packet) corresponding to value1 is discarded, other subsequent subsequent PDU groups in the corresponding PDU group are discarded.
  • the first parameter can also be expressed as ENUMERATED ⁇ value1 ⁇ .
  • the PDCP SDU corresponding to the key data packet (or necessary data packet) corresponding to value1 is discarded, the subsequent other data packets in the corresponding PDU group are discarded, or the corresponding key data packet (or necessary data packet) is discarded.
  • the discardTimer of the PDCP SDU corresponding to the data packet times out, the PDCP SDU will not be discarded temporarily. If this field is not configured, the existing single PDCP SDU discard policy is used.
  • the method of the embodiment of the present disclosure may also include:
  • the PDCP SDU discarding policy is determined based on the first indication information.
  • the terminal can be instructed to perform corresponding discarding processing on the data packets to be transmitted.
  • the embodiment of the present disclosure also provides a data processing device, which is composed of a communication
  • the device executes, and the communication device acts as a PDCP sender.
  • the device includes:
  • the first data processing module 301 is configured to process the data packets in the PDU group according to the first discarding strategy and/or the second discarding strategy when key data packets in a protocol data unit PDU group are lost or exceed the delay budget. Discard processing, the data packets in the PDU group are data packets in the same video stream or data packets in the same video frame;
  • the first discarding strategy includes discarding the Packet Data Convergence Protocol Service Data Unit PDCP SDU corresponding to the key data packet and its corresponding PDCP Data PDU, and discarding the untransmitted data packets in the PDU group and associated with the key data packet.
  • the second discarding strategy includes discarding the PDCP SDU corresponding to the key data packet when the data packets in the PDU group meet the preset discarding conditions.
  • the key data package includes one of the following:
  • the first forward prediction encoded frame P frame in the video stream wherein the data packets after the first P frame depend on the first P frame for decoding;
  • the first forward prediction coding slice P slice in the video frame wherein the data packets after the first P slice depend on the first P slice for decoding
  • the first IP data packet in the video frame is any IP data packet among multiple IP data packets in the video frame.
  • the data packets associated with the critical data packet include one of the following:
  • the preset discard conditions include one of the following:
  • the PDCP SDU corresponding to the key data packet is successfully sent
  • the device of the embodiment of the present disclosure may also include:
  • the first receiving module is configured to receive the PDCP SDU discarding policy sent by the network side device when the communication device is a terminal.
  • the PDCP SDU discarding policy includes a first discarding policy and/or a second discarding policy.
  • the PDCP SDU discard policy is received through Radio Resource Control RRC messages.
  • the device of the embodiment of the present disclosure may also include:
  • the second receiving module is used to receive the first indication information sent by the network side device.
  • the first indication information is used to indicate the key data packets in the PDU group and the data packets associated with the key data packets.
  • the PDCP SDU discarding policy is based on the first Instructions confirmed.
  • the data processing device in the embodiment of the present disclosure when the key data packets in a protocol data unit PDU group are lost or exceed the delay budget, the data packets in the PDU group are processed according to the first discarding strategy and/or the second discarding strategy. Discard processing is performed.
  • the data packets in the PDU group are data packets in the same video stream or data packets in the same video frame.
  • the first discarding strategy includes discarding the packet data convergence protocol service data unit PDCP SDU corresponding to the key data packet.
  • the second discarding policy includes the When the data packet meets the preset discarding conditions, the PDCP SDU corresponding to the key data packet is discarded. In this way, using the above discarding strategy can ensure the integrity of the transmitted video stream or video frame, thereby enabling the receiving end to realize the video stream or video frame. decoding.
  • an embodiment of the present disclosure also provides a communication device.
  • the communication device includes a processor 400 and a transceiver 410.
  • the transceiver 410 receives data under the control of the processor 400. and send data.
  • the terminal also includes a user interface 420, and the processor 400 is used to perform the following operations:
  • the data packets in the PDU group are discarded according to the first discarding policy and/or the second discarding policy. It is a data packet in the same video stream or a data packet in the same video frame;
  • the first discarding strategy includes discarding the packet data aggregation protocol service corresponding to the critical data packet.
  • the data unit PDCP SDU and its corresponding PDCP Data PDU and discards the PDCP SDU and its corresponding PDCP Data PDU corresponding to the data packets that are not transmitted in the PDU group and are associated with key data packets;
  • the second discarding strategy includes discarding the PDCP SDU corresponding to the key data packet when the data packets in the PDU group meet the preset discarding conditions.
  • the key data package includes one of the following:
  • the first forward prediction encoded frame P frame in the video stream wherein the data packets after the first P frame depend on the first P frame for decoding;
  • the first forward prediction coding slice P slice in the video frame wherein the data packets after the first P slice depend on the first P slice for decoding
  • the first IP data packet in the video frame is any IP data packet among multiple IP data packets in the video frame.
  • the data packets associated with the critical data packet include one of the following:
  • the preset discard conditions include one of the following:
  • the PDCP SDU corresponding to the key data packet is successfully sent
  • the transceiver 410 is also used for:
  • the PDCP SDU discarding policy When the communication device is a terminal, the PDCP SDU discarding policy sent by the network side device is received.
  • the PDCP SDU discarding policy includes a first discarding policy and/or a second discarding policy.
  • the PDCP SDU discard policy is received through Radio Resource Control RRC messages.
  • the transceiver 410 is also used for:
  • the first indication information is used to indicate key data packets in the PDU group and data packets associated with the key data packets.
  • the PDCP SDU discarding policy is determined based on the first indication information.
  • the communication device in the embodiment of the present disclosure when a key data packet in a protocol data unit PDU group is lost or exceeds the delay budget, performs processing on the data packets in the PDU group according to the first discarding policy and/or the second discarding policy.
  • the data packets in the PDU group are data packets in the same video stream or data packets in the same video frame
  • the first discarding strategy includes discarding the Packet Data Convergence Protocol Service Data Unit PDCP SDU corresponding to the key data packet and its Corresponding PDCP Data PDU, and discard the PDCP SDU corresponding to the data packets that are not transmitted in the PDU group and are associated with the key data packets and their corresponding PDCP Data PDU
  • the second discarding policy includes the data in the PDU group
  • the packet meets the preset discard conditions the PDCP SDU corresponding to the key data packet is discarded.
  • using the above discard strategy can ensure the integrity of the transmitted video stream or video frame, thereby enabling the receiving end to realize the video stream or video frame. decoding.
  • An embodiment of the present disclosure also provides a communication device.
  • the communication device includes a memory, a processor, and a computer program stored in the memory and executable on the processor.
  • the processor executes The program implements each process in the above-mentioned data processing method embodiment and can achieve the same technical effect. To avoid duplication, it will not be described again here.
  • Embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored.
  • the program When executed by a processor, the program implements each process in the above-mentioned data processing method embodiment and can achieve the same technical effect. , to avoid repetition, will not be repeated here.
  • the computer-readable storage medium is such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
  • embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) embodying computer-usable program code therein.
  • a computer-readable storage media including, but not limited to, magnetic disk storage, optical storage, and the like
  • These computer program instructions may also be stored in a computer-readable storage medium capable of directing a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce a paper product including instruction means,
  • the instruction means implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing the computer or other programmable device to perform a series of operating steps to produce computer-implemented processes, thereby causing the instructions to be executed on the computer or other programmable device.

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Abstract

本公开提供一种数据处理方法、装置及通信设备。本公开方法包括:在一个PDU组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理;其中,第一丢弃策略包括丢弃关键数据包对应的PDCP SDU及其相对应的PDCP Data PDU,并丢弃PDU组内未传输的、且与关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;第二丢弃策略包括在PDU组内的数据包满足预设丢弃条件时,丢弃关键数据包对应的PDCP SDU。

Description

数据处理方法、装置及通信设备
相关申请的交叉引用
本申请主张在2022年07月22日在中国提交的中国专利申请No.202210866809.7的优先权,其全部内容通过引用包含于此。
技术领域
本公开涉及分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)数据处理技术领域,尤其是涉及一种数据处理方法、装置及通信设备。
背景技术
相关技术对于扩展现实(Extended Reality,XR)和媒体服务,在属于一个整体(如同一视频流或同一视频帧)的所有数据包均被成功传输的情况下,才可以对该整体进行解码。发送端一旦存在数据包的丢失或者超过延迟预算,则无法实现所传输的视频流或视频帧的完整性,进而接收端无法实现对视频流或视频帧的解码。
发明内容
本公开的目的在于提供一种数据处理方法、装置及通信设备,能够在发送端保证所传输的视频流或视频帧的完整性,进而使得接收端实现对视频流或视频帧的解码。
为了达到上述目的,本公开提供一种数据处理方法,由通信设备执行,所述通信设备作为PDCP发送端,该方法包括:
在一个协议数据单元(Protocol Data Unit,PDU)组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,所述PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包;
其中,第一丢弃策略包括丢弃所述关键数据包对应的分组数据汇聚协议(PDCP)服务数据单元(Service Data Unit,SDU)及其相对应的PDCP数据 (Data)PDU,并丢弃所述PDU组内未传输的、且与所述关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;
第二丢弃策略包括在所述PDU组内的数据包满足预设丢弃条件时,丢弃所述关键数据包对应的PDCP SDU。
其中,所述关键数据包包括下述中的一者:
视频流中帧内编码帧I帧;
视频流中第一前向预测编码帧P帧,其中,第一P帧之后的数据包依赖于所述第一P帧进行解码;
视频帧中切片内编码切片I切片;
视频帧中第一前向预测编码切片P切片,其中,第一P切片之后的数据包依赖于所述第一P切片进行解码;
视频帧中第一IP数据包,所述第一IP数据包为所述视频帧中多个IP数据包中的任一一个IP数据包。
其中,与所述关键数据包相关联的数据包包括下述中的一者:
I帧之后的所有P帧;
所述第一P帧之后的所有P帧;
I切片之后的所有P切片;
所述第一P切片之后的所有P切片;
除所述第一IP数据包外的所有IP数据包。
其中,所述预设丢弃条件包括下述中的一者:
所述关键数据包对应的PDCP SDU被成功发送;
所述PDU组内的所有数据包均被成功发送;
所述PDU组内的所有数据包均超过各自对应的延迟预算。
其中,在所述通信设备为终端的情况下,所述方法还包括:
接收网络侧设备发送的PDCP SDU丢弃策略,所述PDCP SDU丢弃策略包括第一丢弃策略和/或第二丢弃策略。
其中,所述PDCP SDU丢弃策略通过无线资源控制(Radio Resource Control,RRC)消息接收。
其中,所述方法还包括:
接收网络侧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PDU组内的所述关键数据包以及与所述关键数据包相关联的数据包,所述PDCP SDU丢弃策略基于所述第一指示信息确定。
本公开还提供一种数据处理装置,包括:
第一数据处理模块,用于在一个协议数据单元PDU组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,所述PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包;
其中,第一丢弃策略包括丢弃所述关键数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃所述PDU组内未传输的、且与所述关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;
第二丢弃策略包括在所述PDU组内的数据包满足预设丢弃条件时,丢弃所述关键数据包对应的PDCP SDU。
本公开还提供一种通信设备,所述通信设备作为PDCP发送端,包括处理器和收发器,所述收发器在处理器的控制下接收和发送数据,所述处理器用于执行以下操作:
在一个协议数据单元PDU组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,所述PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包;
其中,第一丢弃策略包括丢弃所述关键数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃所述PDU组内未传输的、且与所述关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;
第二丢弃策略包括在所述PDU组内的数据包满足预设丢弃条件时,丢弃所述关键数据包对应的PDCP SDU。
其中,所述关键数据包包括下述中的一者:
视频流中帧内编码帧I帧;
视频流中第一前向预测编码帧P帧,其中,第一P帧之后的数据包依赖于所述第一P帧进行解码;
视频帧中切片内编码切片I切片;
视频帧中第一前向预测编码切片P切片,其中,第一P切片之后的数据包依赖于所述第一P切片进行解码;
视频帧中第一IP数据包,所述第一IP数据包为所述视频帧中多个IP数据包中的任一一个IP数据包。
其中,与所述关键数据包相关联的数据包包括下述中的一者:
I帧之后的所有P帧;
所述第一P帧之后的所有P帧;
I切片之后的所有P切片;
所述第一P切片之后的所有P切片;
除所述第一IP数据包外的所有IP数据包。
其中,所述预设丢弃条件包括下述中的一者:
所述关键数据包对应的PDCP SDU被成功发送;
所述PDU组内的所有数据包均被成功发送;
所述PDU组内的所有数据包均超过各自对应的延迟预算。
其中,所述收发器还用于:
在所述通信设备为终端的情况下,接收网络侧设备发送的PDCP SDU丢弃策略,所述PDCP SDU丢弃策略包括第一丢弃策略和/或第二丢弃策略。
其中,所述PDCP SDU丢弃策略通过无线资源控制RRC消息接收。
其中,所述收发器还用于:
接收网络侧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PDU组内的所述关键数据包以及与所述关键数据包相关联的数据包,所述PDCP SDU丢弃策略基于所述第一指示信息确定。
本公开还提供一种通信设备,所述通信设备作为PDCP发送端,包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序;所述处理器执行所述程序时实现如上述所述的数据处理方法。
本公开还提供一种计算机可读存储介质,其上存储有计算机程序,其中, 该程序被处理器执行时实现如上述所述的数据处理方法中的步骤。
本公开的上述技术方案至少具有如下有益效果:
本公开实施例中,通过在一个协议数据单元PDU组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包,其中,第一丢弃策略包括丢弃关键数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃PDU组内未传输的、且与关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;第二丢弃策略包括在PDU组内的数据包满足预设丢弃条件时,丢弃关键数据包对应的PDCP SDU,如此,采用上述丢弃策略,能够保证所传输的视频流或视频帧的完整性,进而使得接收端实现对视频流或视频帧的解码。
附图说明
图1表示本公开实施例的数据处理方法的流程示意图;
图2表示本公开示例中数据处理方法的直观操作示意图;
图3表示本公开实施例的数据处理装置的模块示意图;
图4表示本公开实施例的通信设备的结构示意图。
具体实施方式
为使本公开要解决的技术问题、技术方案和优点更加清楚,下面将结合附图及具体实施例进行详细描述。
相关视频编码方案,定义了两种额外的子模型:基于切片(slice based)的模型和基于图像组(Group of Pictures,GOP)的模型。
一、基于切片(slice based)的模型
在这种编码方案中,单个视频帧被分成N个切片。在N个切片(这里称为一个切片组)中,1个切片是I切片,其余N-1个切片是P切片。N个包(一个I包和N-1个P包)对应于同时到达的一个视频帧。
二、基于GOP的模型
在这种编码方案中,单个视频帧是帧内编码帧(I-frame,I帧)或前向预测编码帧(P-frame,P帧)。I帧每K个帧传输一次,其中K是GOP大小。一个视频帧一次作为一个数据包到达。
其中,I帧是关键帧,对应一帧画面的完整保留,解码时只需要本帧数据就可以完成。P帧是差别帧,P帧没有完整画面数据,只有与前一帧(I帧或P帧)的画面差别的数据,解码时需要之前缓存的画面叠加上本帧定义的差别,生成最终画面。
在一个GOP中,P帧是由I帧预测得到的,当I帧的图像质量比较差或丢失时,会影响到一个GOP中后续P帧的图像质量,直到下一个GOP开始才有可能得以恢复。
可以看出,对于XR和媒体服务,不同类型的帧共存并具有不同的重要性。例如,在一个GOP中,第一个I帧是最重要的帧,其它P帧基于I帧进行编码。也就是说,P帧的解码依赖于同一GOP中的I帧的解码。另外,还可能存在一个P帧依赖于其之前的P帧进行解码的情况。
在媒体层,这样一个切片组或GOP内的数据包应被作为一个整体进行解码/处理。例如,针对基于切片的模型,只有在承载帧或者视频切片的所有分组都被成功传送的情况下,才可以对帧或者视频切片进行解码。针对基于GOP的模型,只有在成功接收到某个帧所依赖的所有帧的情况下,客户端才能解码。
在属于一个整体(如同一视频流或同一视频帧)的所有数据包均被成功传输的情况下,才可以对该整体进行解码。相关技术中若发送端存在数据包的丢失,则其他未传输的数据包仍将继续被发送,或者若发送端存在数据包超过延迟预算,则丢弃该数据包,且其他未传输的数据包仍将继续被发送。上述处理都无法实现所传输的视频流或视频帧的完整性,进而接收端无法实现对视频流或视频帧的解码。
为了解决上述技术问题,本公开提供一种数据处理方法、装置及通信设备。
如图1所示,为本公开实施例提供的数据处理方法的流程示意图。该方法由通信设备执行,且该通信设备作为PDCP发送端。需要说明的是,作为 PDCP发送端的通信设备可以是终端,也可以是基站。若通信设备为终端,则数据传输是由终端发送至基站的,若通信设备为基站,则数据传输是由基站发送至终端的。其中,该方法可以具体包括以下步骤:
步骤101,在一个协议数据单元PDU组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包;
其中,第一丢弃策略包括丢弃关键数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃PDU组内未传输的、且与关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;
第二丢弃策略包括在PDU组内的数据包满足预设丢弃条件时,丢弃关键数据包对应的PDCP SDU。
这里,延迟预算用于标识数据传输所允许的最大延迟。其中,延迟预算可以是分组延迟预算(Packet Delay Budget,PDB)。
需要说明的是,延迟预算可以通过丢弃定时器(discardTimer)的时长表示。数据包对应的分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)服务数据单元(Service Data Unit,SDU)承载有数据包。
可选地,同一视频流中的数据包为同一GOP内的视频帧,一个视频帧作为一个数据包。同一视频帧中的数据包为同一切片组内的切片,一个切片作为一个数据包,其中,一个视频帧分为N个切片,该N个切片称为一个切片组;或者,同一视频帧中的数据包为同一视频帧中的IP数据包。
在PDCP层实现中,存在基于丢弃定时器discardTimer的PDCP SDU丢弃功能。PDCP SDU丢弃是PDCP发送端的行为,每个PDCP SDU对应一个discardTimer。当从上层(如通信设备的应用层)收到一个PDCP SDU时,PDCP发送实体会为该PDCP SDU启动discardTimer,一旦启动,该discardTimer会一直运行,直到超时才会停止。需要说明的是,每个PDCP SDU只能在discardTimer的时长(该时长可由PDCP实体配置)内停留在传输缓存(buffer)中。若discardTimer超时,表明在discardTimer的时长内该PDCP SDU没有 被成功发送出去,对于该情形,现有处理方式是丢弃该PDCP SDU及其相对应的PDCP Data PDU。如果对应的PDCP Data PDU已经递交给无线链路控制(Radio Link Control,RLC)层,则指示RLC层丢弃对应的数据。但是对于承载帧/视频切片的其他数据包(分组)对应的PDCP SDU,PDCP发送实体会继续尝试发送,而这些数据包对于接收端是无用的,因为只有属于一个整体(如同一视频流或同一视频帧)的所有数据包均被成功传输的情况下,才可以对该整体进行解码,现有处理方式不仅不可以实现所传输的视频流或视频帧的完整性,还浪费无线资源。
需要说明的是,discardTimer由RRC层配置,其取值取决于无线承载的时延要求。基于定时器的PDCP SDU丢弃仅应用于数据无线承载(Data Radio Bearer,DRB),信令无线承载(Signaling Radio Bearer,SRB)不支持基于定时器的PDCP SDU丢弃。
来自核心网或终端应用层的数据将以PDU组(PDU set)的形式存在(例如,属于同一切片组或同一GOP的数据包隶属于同一PDU set),并且来自核心网或UE应用层的数据包携带了PDU set序列号(Sequence Number,SN)、PDU set内的数据包SN信息和/或该数据包是否为关键数据包(如I帧)或必要数据包的信息。
而在本公开实施例中,具体的,在一个协议数据单元(Protocol Data Unit,PDU)组内的关键数据包超过延迟预算的情况下,按照第一丢弃策略或者第二丢弃策略对PDU组内的数据包进行丢弃处理。需要说明的是,关键数据包即第一数据包。
在一个PDU组内的关键数据包丢失的情况下,按照第一丢弃策略对PDU组内的数据包进行丢弃处理。
需要说明的是,在一个PDU组内的关键数据包超过延迟预算的情况下,按照第一丢弃策略对PDU组内的数据包进行丢弃处理,即丢弃关键数据包对应的PDCP SDU及其相对应的PDCP Data PDU,并丢弃PDU组内未传输的、且与关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU。也就是说,处理丢弃掉超过延迟预算的关键数据包对应的PDCP SDU及其相对应的PDCP Data PDU,还丢弃掉与关键数据包相关联的数据包对应 的PDCP SDU及其相对应的PDCP Data PDU,即丢弃掉其他的对于接收端无用的数据包,也就是说丢弃掉已经不完整的视频流或视频帧,这样不仅能够节省无线资源,而且还能够达到只传输完整的视频流或视频帧的目的。
需要说明的是,与关键数据包相关联的数据包指的是该数据包的解码依赖于关键数据包。
可选地,关键数据包为下述中的一者:
视频流中帧内编码帧I帧;
视频流中第一前向预测编码帧P帧,其中,第一P帧之后的数据包依赖于第一P帧进行解码;
视频帧中切片内编码切片I切片;
视频帧中第一前向预测编码切片P切片,其中,第一P切片之后的数据包依赖于第一P切片进行解码;
视频帧中第一IP数据包,第一IP数据包为视频帧中多个IP数据包中的任一一个IP数据包。
需要说明的是,若关键数据包属于同一GOP内的数据包,则关键数据包为该GOP内的I帧或者该GOP内的第一P帧。
若关键数据包属于同一切片组内的数据包,则关键数据包为切片组内的I切片或者该切片组内的第一P切片。
若关键数据包属于同一视频帧中的IP数据包,则关键数据包为该视频帧的第一IP数据包,其中该第一IP数据包为该视频帧中多个IP数据包中的任意一者。
进一步地,与关键数据包相关联的数据包包括下述中的一者:
I帧之后的所有P帧;
所述第一P帧之后的所有P帧;
I切片之后的所有P切片;
第一P切片之后的所有P切片;
除第一IP数据包外的所有IP数据包。
相应的,若关键数据包属于同一GOP内的数据包,则与关键数据包相关联的数据包包括该GOP内I帧之后的所有P帧,或者该GOP内第一P帧之 后的所有P帧。
若关键数据包属于同一切片组内的数据包,则与关键数据包相关联的数据包包括该切片组内I切片之后的所有P切片,或者该切片组内第一P切片之后的所有P切片。
若关键数据包属于同一视频帧中的IP数据包,则与关键数据包相关联的数据包包括该视频帧除第一IP数据包外的所有IP数据包。
作为一可选地实现方式,针对按照第一丢弃策略对PDU组内的数据包进行丢弃处理的情况,本公开实施例的方法还可包括:
若通信设备的PDCP层确定第一PDCP Data PDU已递交至RLC层,则向RLC层发送第二指示信息,第二指示信息用于指示RLC层丢弃第一PDCP Data PDU,其中,第一PDCP Data PDU为关键数据包对应的PDCP SDU所对应的PDCP Data PDU,或者与关键数据包相关联的数据包对应的PDCP SDU所对应的PDCP Data PDU。
该实现方式能够保确保数据包在发送端被丢弃。
需要说明的是,在一个PDU组内的关键数据包丢失的情况下,按照第一丢弃策略对PDU组内的数据包进行丢弃处理。即一个PDU组内的关键数据包丢失,通信设备待传输的视频流或视频帧已经不完整了,所以按照第一丢弃策略对PDU组内的数据包进行丢弃处理,丢弃掉已经不完整的视频流或视频帧,这样不仅能够节省无线资源,而且还能够达到只传输完整的视频流或视频帧的目的。
这里,关键数据包丢失可以是未接收到来自核心网的该关键数据包。
上述按照第一丢弃策略对PDU组内的数据包进行丢弃处理的情况,也可以理解为,当一个PDU组内的关键数据包丢失或者由于超过延迟预算而被丢弃的情况下,同一PDU组内与该关键数据包相关联的其他数据包也被丢弃。
参见图2,一个PDU组内的关键数据包(如I帧)丢失或者因为discardTimer超时而被丢弃,则同一PDU组内的后续其他数据包(如P帧)也被丢弃。
针对在一个PDU组内的关键数据包超过延迟预算的情况下,按照第二丢弃策略对PDU组内的数据包进行丢弃处理的实现方式,可选地,预设丢弃条 件包括下述中的一者:
关键数据包对应的PDCP SDU被成功发送;
PDU组内的所有数据包均被成功发送;
PDU组内的所有数据包均超过各自对应的延迟预算。
这里,当预设丢弃条件为关键数据包对应的PDCP SDU被成功发送,说明传输buffer中不再需要保存关键数据包对应的PDCP SDU,所以此时丢弃关键数据包对应的PDCP SDU。
当预设丢弃条件为PDU组内的所有数据包均被成功发送,说明作为一个整体PDU组内的同一视频流或视频帧可以被接收端解码,此时传输buffer中不再需要保存关键数据包对应的PDCP SDU,所以丢弃关键数据包对应的PDCP SDU。
当预设丢弃条件为PDU组内的所有数据包均超过各自对应的延迟预算,也就是,承载PDU组内的所有数据包各自对应的PDU SDU的discardTime超时,说明PDU组内的所有数据包在各自对应的延迟预算内均没有被成功发送出去,说明作为一个整体PDU组内的同一视频流或视频帧不会被接收端解码,此时传输buffer中不再需要保存关键数据包对应的PDCP SDU,所以丢弃关键数据包对应的PDCP SDU。
这里,第二丢弃策略可以理解为对关键数据包对应的PDCP SDU一个延迟丢弃,即只有在PDU组内的数据包满足上述预设丢弃条件时,才丢弃关键数据包对应的PDCP SDU,以保证关键数据包能够更长时间的保存在缓存中,从而保证同一PDU组内的后续数据包的解码。
需要说明的是,无论使用第一丢弃策略还是第二丢弃策略,在满足各自对应的丢弃情况下,其策略中都还包括当一个PDCP SDU对应一个非关键数据包或承载是PDU组的一个非必要数据包,且该数据包超过对应的延迟预算,通信设备丢弃该数据包对应的PDCP SDU及其相对应的PDCP Data PDU。如果对应的PDCP Data PDU已经递交给RLC层,则指示RLC层丢弃对应的数据。
在一可选地实现方式中,在通信设备为终端的情况下,本公开实施例的方法还可包括:
接收网络侧设备发送的PDCP SDU丢弃策略,PDCP SDU丢弃策略包括第一丢弃策略和/或第二丢弃策略。
可选地,网络侧设备为基站。
需要说明的是,网络侧设备会为终端配置PDCP SDU丢弃策略,以指示终端对相应的数据包按照该PDCP SDU丢弃策略执行丢弃处理。
可选地,PDCP SDU丢弃策略通过无线资源控制RRC消息接收。这里也可以理解为:接收网络侧发送的RRC消息,该RRC消息中携带有PDCP SDU丢弃策略。
具体的,当网络侧设备为终端配置一个DRB时,可以通过RRC配置指定该DRB的作为PDCP发送端的通信设备的PDCP SDU丢弃策略。
其中,RRC消息包括PDCP-Config配置,且该PDCP-Config配置中新增第一参数,该第一参数用于指示PDCP SDU丢弃策略。
其中,第一参数可表示为枚举(ENUMERATED){值(value)1,value2},value1对应关键数据包(或必要数据包)对应的PDCP SDU被丢弃时,丢弃对应PDU组内的后续其他数据包;value2对应关键数据包(或必要数据包)对应的PDCP SDU的discardTimer超时时,暂不丢弃该PDCP SDU。若没有配置此字段,则使用现有的单个PDCP SDU丢弃策略。
第一参数还可表示为ENUMERATED{value1},value1对应关键数据包(或必要数据包)对应的PDCP SDU被丢弃时,丢弃对应PDU组内的后续其他数据包,或者对应关键数据包(或必要数据包)对应的PDCP SDU的discardTimer超时时,暂不丢弃该PDCP SDU。若没有配置此字段,则使用现有的单个PDCP SDU丢弃策略。
作为一可选地实现方式,本公开实施例的方法还可包括:
S21,接收网络侧设备发送的第一指示信息,第一指示信息用于指示PDU组内的关键数据包以及与关键数据包相关联的数据包,PDCP SDU丢弃策略基于第一指示信息确定。
需要说明的是,通过网络侧设备发送的第一指示信息以及PDCP SDU丢弃策略,能够指示终端对待传输的数据包进行相应的丢弃处理。
如图3所示,本公开实施例还提供了一种数据处理装置,该装置由通信 设备执行,且该通信设备作为PDCP发送端。其中该装置包括:
第一数据处理模块301,用于在一个协议数据单元PDU组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包;
其中,第一丢弃策略包括丢弃关键数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃PDU组内未传输的、且与关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;
第二丢弃策略包括在PDU组内的数据包满足预设丢弃条件时,丢弃关键数据包对应的PDCP SDU。
可选地,关键数据包包括下述中的一者:
视频流中帧内编码帧I帧;
视频流中第一前向预测编码帧P帧,其中,第一P帧之后的数据包依赖于第一P帧进行解码;
视频帧中切片内编码切片I切片;
视频帧中第一前向预测编码切片P切片,其中,第一P切片之后的数据包依赖于第一P切片进行解码;
视频帧中第一IP数据包,第一IP数据包为视频帧中多个IP数据包中的任一一个IP数据包。
可选地,与关键数据包相关联的数据包包括下述中的一者:
I帧之后的所有P帧;
第一P帧之后的所有P帧;
I切片之后的所有P切片;
第一P切片之后的所有P切片;
除第一IP数据包外的所有IP数据包。
可选地,预设丢弃条件包括下述中的一者:
关键数据包对应的PDCP SDU被成功发送;
PDU组内的所有数据包均被成功发送;
PDU组内的所有数据包均超过各自对应的延迟预算。
可选地,本公开实施例的装置还可包括:
第一接收模块,用于在通信设备为终端的情况下,接收网络侧设备发送的PDCP SDU丢弃策略,PDCP SDU丢弃策略包括第一丢弃策略和/或第二丢弃策略。
可选地,PDCP SDU丢弃策略通过无线资源控制RRC消息接收。
可选地,本公开实施例的装置还可包括:
第二接收模块,用于接收网络侧设备发送的第一指示信息,第一指示信息用于指示PDU组内的关键数据包以及与关键数据包相关联的数据包,PDCP SDU丢弃策略基于第一指示信息确定。
本公开实施例的数据处理装置,通过在一个协议数据单元PDU组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包,其中,第一丢弃策略包括丢弃关键数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃PDU组内未传输的、且与关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;第二丢弃策略包括在PDU组内的数据包满足预设丢弃条件时,丢弃关键数据包对应的PDCP SDU,如此,采用上述丢弃策略,能够保证所传输的视频流或视频帧的完整性,进而使得接收端实现对视频流或视频帧的解码。
为了更好的实现上述目的,如图4所示,本公开实施例还提供一种通信设备,该通信设备包括处理器400和收发器410,所述收发器410在处理器400的控制下接收和发送数据,在通信设备为终端的情况下,该终端还包括用户接口420,所述处理器400用于执行以下操作:
在一个协议数据单元PDU组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包;
其中,第一丢弃策略包括丢弃关键数据包对应的分组数据汇聚协议服务 数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃PDU组内未传输的、且与关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;
第二丢弃策略包括在PDU组内的数据包满足预设丢弃条件时,丢弃关键数据包对应的PDCP SDU。
可选地,关键数据包包括下述中的一者:
视频流中帧内编码帧I帧;
视频流中第一前向预测编码帧P帧,其中,第一P帧之后的数据包依赖于第一P帧进行解码;
视频帧中切片内编码切片I切片;
视频帧中第一前向预测编码切片P切片,其中,第一P切片之后的数据包依赖于第一P切片进行解码;
视频帧中第一IP数据包,第一IP数据包为视频帧中多个IP数据包中的任一一个IP数据包。
可选地,与关键数据包相关联的数据包包括下述中的一者:
I帧之后的所有P帧;
第一P帧之后的所有P帧;
I切片之后的所有P切片;
第一P切片之后的所有P切片;
除第一IP数据包外的所有IP数据包。
可选地,预设丢弃条件包括下述中的一者:
关键数据包对应的PDCP SDU被成功发送;
PDU组内的所有数据包均被成功发送;
PDU组内的所有数据包均超过各自对应的延迟预算。
可选地,收发器410还用于:
在通信设备为终端的情况下,接收网络侧设备发送的PDCP SDU丢弃策略,PDCP SDU丢弃策略包括第一丢弃策略和/或第二丢弃策略。
可选地,PDCP SDU丢弃策略通过无线资源控制RRC消息接收。
可选地,收发器410还用于:
接收网络侧设备发送的第一指示信息,第一指示信息用于指示PDU组内的关键数据包以及与关键数据包相关联的数据包,PDCP SDU丢弃策略基于第一指示信息确定。
本公开实施例的通信设备,通过在一个协议数据单元PDU组内的关键数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包,其中,第一丢弃策略包括丢弃关键数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃PDU组内未传输的、且与关键数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;第二丢弃策略包括在PDU组内的数据包满足预设丢弃条件时,丢弃关键数据包对应的PDCP SDU,如此,采用上述丢弃策略,能够保证所传输的视频流或视频帧的完整性,进而使得接收端实现对视频流或视频帧的解码。
本公开实施例还提供一种通信设备,所述通信设备作为PDCP发送端,包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序,所述处理器执行所述程序时实现如上所述的数据处理方法实施例中的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。
本公开实施例还提供一种计算机可读存储介质,其上存储有计算机程序,该程序被处理器执行时实现如上所述的数据处理方法实施例中的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。其中,所述的计算机可读存储介质,如只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等。
本领域内的技术人员应明白,本公开的实施例可提供为方法、系统或计算机程序产品。因此,本公开可采用完全硬件实施例、完全软件实施例或结合软件和硬件方面的实施例的形式。而且,本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可读存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和 /或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其它可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其它可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其它可编程数据处理设备以特定方式工作的计算机可读存储介质中,使得存储在该计算机可读存储介质中的指令产生包括指令装置的纸制品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其它可编程数据处理设备上,使得计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他科编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述是本公开的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本公开所述原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本公开的保护范围。

Claims (17)

  1. 一种数据处理方法,由通信设备执行,所述通信设备作为PDCP发送端,所述方法包括:
    在一个协议数据单元PDU组内的第一数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,所述PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包;
    其中,第一丢弃策略包括丢弃所述第一数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃所述PDU组内未传输的、且与所述第一数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;
    第二丢弃策略包括在所述PDU组内的数据包满足预设丢弃条件时,丢弃所述第一数据包对应的PDCP SDU。
  2. 根据权利要求1所述的方法,其中,所述第一数据包包括下述中的一者:
    视频流中帧内编码帧I帧;
    视频流中第一前向预测编码帧P帧,其中,第一P帧之后的数据包依赖于所述第一P帧进行解码;
    视频帧中切片内编码切片I切片;
    视频帧中第一前向预测编码切片P切片,其中,第一P切片之后的数据包依赖于所述第一P切片进行解码;
    视频帧中第一IP数据包,所述第一IP数据包为所述视频帧中多个IP数据包中的任一一个IP数据包。
  3. 根据权利要求2所述的方法,其中,与所述第一数据包相关联的数据包包括下述中的一者:
    I帧之后的所有P帧;
    所述第一P帧之后的所有P帧;
    I切片之后的所有P切片;
    所述第一P切片之后的所有P切片;
    除所述第一IP数据包外的所有IP数据包。
  4. 根据权利要求1所述的方法,其中,所述预设丢弃条件包括下述中的一者:
    所述第一数据包对应的PDCP SDU被成功发送;
    所述PDU组内的所有数据包均被成功发送;
    所述PDU组内的所有数据包均超过各自对应的延迟预算。
  5. 根据权利要求1所述的方法,其中,在所述通信设备为终端的情况下,所述方法还包括:
    接收网络侧设备发送的PDCP SDU丢弃策略,所述PDCP SDU丢弃策略包括第一丢弃策略和/或第二丢弃策略。
  6. 根据权利要求5所述的方法,其中,所述PDCP SDU丢弃策略通过无线资源控制RRC消息接收。
  7. 根据权利要求5所述的方法,所述方法还包括:
    接收网络侧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PDU组内的所述第一数据包以及与所述第一数据包相关联的数据包,所述PDCP SDU丢弃策略基于所述第一指示信息确定。
  8. 一种数据处理装置,包括:
    第一数据处理模块,用于在一个协议数据单元PDU组内的第一数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,所述PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包;
    其中,第一丢弃策略包括丢弃所述第一数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃所述PDU组内未传输的、且与所述第一数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;
    第二丢弃策略包括在所述PDU组内的数据包满足预设丢弃条件时,丢弃所述第一数据包对应的PDCP SDU。
  9. 一种通信设备,所述通信设备作为PDCP发送端,包括处理器和收发 器,所述收发器在处理器的控制下接收和发送数据,其中,所述处理器用于执行以下操作:
    在一个协议数据单元PDU组内的第一数据包丢失或者超过延迟预算的情况下,按照第一丢弃策略和/或第二丢弃策略对PDU组内的数据包进行丢弃处理,所述PDU组内的数据包为同一视频流中的数据包或者同一视频帧中的数据包;
    其中,第一丢弃策略包括丢弃所述第一数据包对应的分组数据汇聚协议服务数据单元PDCP SDU及其相对应的PDCP Data PDU,并丢弃所述PDU组内未传输的、且与所述第一数据包相关联的数据包对应的PDCP SDU及其相对应的PDCP Data PDU;
    第二丢弃策略包括在所述PDU组内的数据包满足预设丢弃条件时,丢弃所述第一数据包对应的PDCP SDU。
  10. 根据权利要求9所述的通信设备,其中,所述第一数据包包括下述中的一者:
    视频流中帧内编码帧I帧;
    视频流中第一前向预测编码帧P帧,其中,第一P帧之后的数据包依赖于所述第一P帧进行解码;
    视频帧中切片内编码切片I切片;
    视频帧中第一前向预测编码切片P切片,其中,第一P切片之后的数据包依赖于所述第一P切片进行解码;
    视频帧中第一IP数据包,所述第一IP数据包为所述视频帧中多个IP数据包中的任一一个IP数据包。
  11. 根据权利要求10所述的通信设备,其中,与所述第一数据包相关联的数据包包括下述中的一者:
    I帧之后的所有P帧;
    所述第一P帧之后的所有P帧;
    I切片之后的所有P切片;
    所述第一P切片之后的所有P切片;
    除所述第一IP数据包外的所有IP数据包。
  12. 根据权利要求9所述的通信设备,其中,所述预设丢弃条件包括下述中的一者:
    所述第一数据包对应的PDCP SDU被成功发送;
    所述PDU组内的所有数据包均被成功发送;
    所述PDU组内的所有数据包均超过各自对应的延迟预算。
  13. 根据权利要求9所述的通信设备,其中,所述收发器还用于:
    在所述通信设备为终端的情况下,接收网络侧设备发送的PDCP SDU丢弃策略,所述PDCP SDU丢弃策略包括第一丢弃策略和/或第二丢弃策略。
  14. 根据权利要求13所述的通信设备,其中,所述PDCP SDU丢弃策略通过无线资源控制RRC消息接收。
  15. 根据权利要求13所述的通信设备,其中,所述收发器还用于:
    接收网络侧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PDU组内的所述第一数据包以及与所述第一数据包相关联的数据包,所述PDCP SDU丢弃策略基于所述第一指示信息确定。
  16. 一种通信设备,所述通信设备作为PDCP发送端,包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序;其中,所述处理器执行所述程序时实现如权利要求1至7任一项所述的数据处理方法。
  17. 一种计算机可读存储介质,其上存储有计算机程序,其中,该程序被处理器执行时实现如权利要求1至7任一项所述的数据处理方法中的步骤。
PCT/CN2023/108995 2022-07-22 2023-07-24 数据处理方法、装置及通信设备 WO2024017395A1 (zh)

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