WO2018130059A1 - 数据包传输方法及装置 - Google Patents

数据包传输方法及装置 Download PDF

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Publication number
WO2018130059A1
WO2018130059A1 PCT/CN2017/117881 CN2017117881W WO2018130059A1 WO 2018130059 A1 WO2018130059 A1 WO 2018130059A1 CN 2017117881 W CN2017117881 W CN 2017117881W WO 2018130059 A1 WO2018130059 A1 WO 2018130059A1
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WO
WIPO (PCT)
Prior art keywords
network element
data packet
indication information
terminal
indicate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/117881
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English (en)
French (fr)
Inventor
何青春
高音
黄河
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
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Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to AU2017392542A priority Critical patent/AU2017392542B2/en
Priority to CA3049285A priority patent/CA3049285C/en
Priority to EP17891314.1A priority patent/EP3570631B1/en
Publication of WO2018130059A1 publication Critical patent/WO2018130059A1/zh
Priority to US16/443,861 priority patent/US10560226B2/en
Anticipated expiration legal-status Critical
Priority to US16/786,985 priority patent/US11206106B2/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1621—Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0079—Formats for control data
    • H04L1/0082—Formats for control data fields explicitly indicating existence of error in data being transmitted, e.g. so that downstream stations can avoid decoding erroneous packet; relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1628—List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/32—Flow control; Congestion control by discarding or delaying data units, e.g. packets or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/32—Flow control; Congestion control by discarding or delaying data units, e.g. packets or frames
    • H04L47/323—Discarding or blocking control packets, e.g. ACK packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/34—Flow control; Congestion control ensuring sequence integrity, e.g. using sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0273—Traffic management, e.g. flow control or congestion control adapting protocols for flow control or congestion control to wireless environment, e.g. adapting transmission control protocol [TCP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers

Definitions

  • the present disclosure relates to the field of communications, and in particular to a data packet transmission method and apparatus.
  • the insensitive network function is placed in the first network element (such as a Centralized Unit (CU)), and the delay-sensitive network function is placed in the second network element (such as a distributed processing unit (Distributed Unit, Referred to as DU), the first network element and the second network element are transmitted through an ideal or non-ideal fronthaul.
  • the fronthaul interface between the first network element and the second network element is as shown in FIG. 1 .
  • one of the implementation scenarios is that one first network element connects two or more second network elements. As shown in FIG. 2, the first network element simultaneously sends the data packets of the UE to multiple.
  • the second network element which firstly ensures the reliability and transmission efficiency of transmission between the first network element and the second network element, and improves the reliability and transmission efficiency of data transmission between the second network element and the terminal, in FIG. 2
  • the synchronization of the data packets transmitted by the two second network elements can be well maintained.
  • the embodiment of the present disclosure provides a data packet transmission method and apparatus, to at least solve the problem that the transmission data is not synchronized when a plurality of second network elements send data packets to the terminal in the related art.
  • a data packet transmission method including: the first network element generates first indication information according to a transmission state fed back by the second network element to the first network element, where the first indication The information is used to indicate that the second network element that has sent the data packet to the terminal has failed to discard the data packet indicated by the first indication information.
  • the method before the first network element generates the first indication information according to the transmission status, includes: The second network element sends a data packet to the terminal; the second network element receives the transmission status of the data packet fed back by the terminal; and the second network element feeds back the transmission status to the first network element.
  • the first indication information is used to indicate that the second network element that has sent the data packet to the terminal that has not succeeded to discard the data packet indicated by the first indication information includes at least one of the following: the first indication The information is used to indicate that the second network element that has sent the data packet to the terminal has failed to delete the data packet indicated by the first indication information, where the first indication information is used to indicate that the data packet is sent to the terminal is not successful.
  • the second network element sends an empty data packet to the terminal.
  • the second indication where the first indication information is used to indicate that the data packet is sent to the terminal, is not sent to the terminal, and the second network element sends the data packet to the terminal.
  • the method further includes: the second network element is in the Adding empty packet indication information to the data packet, where the empty packet indication information is used to indicate that the data packet sent to the terminal is a null data packet; and the second network element sends the data packet to the terminal So that the terminal deletes a packet data unit PDU or PDU segment corresponding to the null data packet in the cache.
  • the first indication information is further used to indicate a sequence number of the one or more data packets that need to be transmitted by the at least two second network elements.
  • the first indication information includes at least one of the following: a sequence number of a data packet, a sequence of data packet sequence numbers, an interval segment of a sequence number corresponding to the data packet, and a plurality of interval segment lists.
  • a data packet transmission method including: a second network element receives a data packet sent by a first network element; and a second network element generates a second indication according to a received state of the data packet.
  • the second network element sends the second indication information to the first network element, where the second indication information is used to indicate the receiving status of the data packet.
  • the second indication information is further used to indicate a sequence number of one or more data packets that need to be transmitted by the second network element.
  • the second indication information is transmitted on an interface between the second network element and the first network element.
  • a data packet transmission method including: a first network element sends the same data packet to at least two second network elements; and the first network element receives the at least two second The third indication information that is sent by the second network element of the data packet is successfully received by the network element, where the third indication information is used to indicate that the first network element is deleted and not succeeded to the other second network element. And sending, by the first network element, the same data packet that has not been successfully sent to other second network elements in the at least two second network elements according to the third indication information.
  • the third indication information is further used to indicate a sequence number of the one or more data packets that need to be transmitted by the at least two second network elements.
  • the third indication information is transmitted on an interface between the at least two second network elements and the first network element.
  • a data packet transmission apparatus including a triggering module, where the triggering module is configured to trigger a first network element to generate a first according to a transmission state fed back by the second network element to the first network element. Instructing information, wherein the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not successfully sent the data packet indicated by the first indication information.
  • the apparatus further includes: a first sending module, configured to send a data packet to the terminal; a receiving module is configured to receive a transmission state of the data packet fed back by the terminal; the triggering module is further configured to feed back the transmission state to the first network element.
  • the first indication information is used to indicate that the second network element that has sent the data packet to the terminal that has not succeeded to discard the data packet indicated by the first indication information includes at least one of the following: the first indication The information is used to indicate that the second network element that has sent the data packet to the terminal has failed to delete the data packet indicated by the first indication information, where the first indication information is used to indicate that the data packet is sent to the terminal is not successful.
  • the second network element sends an empty data packet to the terminal.
  • the triggering module is further configured to: when the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not succeeded, send the null data packet to the terminal, and the second network element After the data packet is sent to the terminal is not successful, after the first transmission state is fed back to the first network element and the first network element is triggered to generate the first indication information according to the transmission status, Adding empty packet indication information to the data packet, wherein the empty packet indication information is used to indicate that the data packet sent to the terminal is a null data packet; and the data packet is sent to the terminal, so that the terminal deletes A packet data unit PDU or PDU segment corresponding to the null data packet in the cache.
  • the first indication information is further used to indicate a sequence number of the one or more data packets that need to be transmitted by the at least two second network elements.
  • the first indication information includes at least one of the following: a sequence number of a data packet, a sequence of data packet sequence numbers, an interval segment of a sequence number corresponding to the data packet, and a plurality of interval segment lists.
  • a data packet transmission method including: a second receiving module configured to receive a data packet sent by a first network element; and a generating module configured to receive according to the data packet And generating a second indication information, where the second sending module is configured to send the second indication information to the first network element, where the second indication information is used to indicate a receiving status of the data packet.
  • the second indication information is further used to indicate a sequence number of one or more data packets that need to be transmitted by the second network element.
  • the second indication information is transmitted on an interface between the second network element and the first network element.
  • a data packet transmission apparatus including: a third sending module, configured to send the same data packet to at least two second network elements; and a third receiving module configured to receive The third indication information that is sent by the second network element that successfully receives the data packet in the at least two second network elements, where the third indication information is used to indicate that the first network element is deleted.
  • the data packet successfully sent by the other second network element; the deleting module is configured to delete the same data packet that has not been successfully sent to the other second network element in the at least two second network elements according to the third indication information.
  • the third indication information is further used to indicate a sequence number of the one or more data packets that need to be transmitted by the at least two second network elements.
  • the third indication information is transmitted on an interface between the at least two second network elements and the first network element.
  • a storage medium is also provided.
  • the storage medium is configured to store program code for performing: the second network element transmitting a data packet to the terminal; the second network element receiving a transmission status of the data packet fed back by the terminal; the second network Transmitting the transmission state to the first network element and triggering the first network element according to the
  • the first indication information is generated by the first indication information, where the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has failed to discard the data packet indicated by the first indication information.
  • the storage medium is further configured to store program code for performing the following steps: the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not succeeded to discard the first indication information
  • the indicated data packet includes at least one of the following: the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not successfully deleted the data packet indicated by the first indication information, where the first The indication information is used to indicate that the second network element that has sent the data packet to the terminal has not sent a null data packet to the terminal.
  • the storage medium is further configured to store program code for: transmitting, by the second network element, that the first indication information is used to indicate that the data packet is not successfully sent to the terminal, to send the null data packet to the terminal If the second network element sends the data packet to the terminal, the transmission status is fed back to the first network element, and the first network element is triggered to generate the first information according to the transmission status.
  • the second network element adds null packet indication information to the data packet, where the null packet indication information is used to indicate that the data packet sent to the terminal is an empty data packet; The second network element sends the data packet to the terminal, so that the terminal deletes a packet data unit PDU or a PDU segment corresponding to the null data packet in the cache.
  • the storage medium is further configured to store program code for performing the following steps: the first indication information is further used to indicate a sequence of one or more data packets that need to be transmitted by the at least two second network elements number.
  • the storage medium is further configured to store program code for performing the following steps: the first indication information comprises at least one of: a serial number of a data packet, a serial number list of the data packet, and a serial number corresponding to the data packet. Interval segment, multiple segment segment list.
  • a storage medium is also provided.
  • the storage medium is configured to store program code for performing the following steps: the second network element receives the data packet sent by the first network element; and the second network element generates the second indication information according to the receiving state of the data packet; The second indication information is sent to the first network element, where the second indication information is used to indicate a receiving status of the data packet.
  • the storage medium is further configured to store program code for performing the following steps: the second indication information is further used to indicate a sequence number of one or more data packets that need to be transmitted by the second network element.
  • the storage medium is further configured to store program code for performing the step of: transmitting the second indication information on an interface between the second network element and the first network element.
  • a storage medium is also provided.
  • the storage medium is configured to store program code for performing: the first network element transmitting the same data packet to the at least two second network elements; the first network element receiving the successful reception in the at least two second network elements a third indication information that is sent by the second network element of the data packet, where the third indication information is used to indicate that the first network element deletes a data packet that has not been successfully sent to the other second network element; The first network element deletes, according to the third indication information, the same data packet that has not been successfully sent to other second network elements in the at least two second network elements.
  • the storage medium is further configured to store program code for performing the following steps: the third indication information is further used to indicate a sequence of one or more data packets that need to be transmitted by the at least two second network elements number.
  • the storage medium is further configured to store program code for performing the following steps: the third indication information is in the Transmitting on an interface between the at least two second network elements and the first network element.
  • the second network element sends a data packet to the terminal; the second network element receives the transmission status of the data packet fed back by the terminal; the second network element feeds back the transmission status to the first network element and triggers the first network element to generate according to the transmission status.
  • the first indication information where the first indication information is used to indicate that the second network element that has sent the data packet to the terminal that has not successfully succeeded discards the data packet indicated by the first indication information.
  • the second network element feeds back the transmission status of the transmitted data packet to the first network element, so that the first network element can delete the data packet according to the second network element that does not successfully transmit the data packet according to the transmission status, thereby avoiding successful transmission.
  • the second network element of the data packet transmits a new data packet
  • the second network element that has not successfully transmitted the data packet is still transmitting the data packet that is not successfully transmitted, so that multiple second network elements can synchronously transmit the data, so that the solution can be solved.
  • the problem that the transmission data is not synchronized when a plurality of second network elements send data packets to the terminal ensures synchronization of data transmission between the plurality of second network elements, thereby improving reliability of data transmission.
  • FIG. 1 is a schematic diagram of a fronthaul interface between a first network element and a second network element in the related art
  • FIG. 2 is a schematic diagram of a first network element connected to a plurality of second network elements in the related art
  • FIG. 3 is a block diagram showing the hardware structure of a mobile terminal of a data packet transmission method according to an embodiment of the present disclosure
  • FIG. 4 is a flowchart 1 of a data packet transmission method according to an embodiment of the present disclosure.
  • FIG. 5 is a second flowchart of a data packet transmission method according to an embodiment of the present disclosure.
  • FIG. 6 is a flowchart 3 of a data packet transmission method according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram of a connection structure between a network element and a terminal according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a PDU frame of first indication information transmitted between a first network element and a second network element according to an embodiment of the present disclosure
  • FIG. 9 is a first schematic diagram of a PDU frame structure of a null data packet transmitted between a second network element and a terminal according to an embodiment of the present disclosure
  • FIG. 10 is a second schematic diagram of a PDU frame structure of a null data packet transmitted between a second network element and a terminal according to an embodiment of the present disclosure
  • FIG. 11 is a schematic diagram 1 of a first indication information generation process according to an embodiment of the present application.
  • FIG. 12 is a second schematic diagram of a first indication information generation process according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram showing that a data packet is an empty packet by adding a null packet indication information in a data packet according to an embodiment of the present disclosure
  • FIG. 14 is a schematic diagram of telling a terminal that a data packet is a null packet by a control signaling configuration according to an embodiment of the present disclosure
  • 16 is a schematic flowchart of an uplink data transmission process according to an embodiment of the present disclosure.
  • 17 is a block diagram 1 of a structure of a data packet transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 18 is a structural block diagram 2 of a data packet transmission apparatus according to an embodiment of the present disclosure.
  • 19 is a block diagram 3 of a structure of a data packet transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 3 is a hardware structural block diagram of a mobile terminal of a data packet transmission method according to an embodiment of the present disclosure.
  • the mobile terminal 30 may include one or more (only one shown) processor 302 (the processor 302 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA).
  • the structure shown in FIG. 3 is merely illustrative and does not limit the structure of the above electronic device.
  • the mobile terminal 30 may also include more or fewer components than those shown in FIG. 3, or have a different configuration than that shown in FIG.
  • the memory 304 can be configured as a software program and a module for storing application software, such as program instructions/modules corresponding to the data packet transmission method in the embodiment of the present disclosure, and the processor 302 executes by executing a software program and a module stored in the memory 304.
  • application software such as program instructions/modules corresponding to the data packet transmission method in the embodiment of the present disclosure
  • the processor 302 executes by executing a software program and a module stored in the memory 304.
  • Various functional applications and data processing, that is, the above methods are implemented.
  • Memory 304 can include high speed random access memory and can also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory.
  • memory 304 can include memory remotely located relative to processor 302, which can be connected to mobile terminal 30 over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
  • Transmission device 306 is arranged to receive or transmit data via a network.
  • the network instance described above may include a wireless network provided by a communication provider of the mobile terminal 30.
  • transmission device 306 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet.
  • NIC Network Interface Controller
  • the transmission device 306 can be a Radio Frequency (RF) module configured to communicate with the Internet wirelessly.
  • RF Radio Frequency
  • FIG. 4 is a flowchart 1 of a data packet transmission method according to an embodiment of the present disclosure. As shown in FIG. 4, the flow includes the following steps:
  • Step S402 the second network element sends a data packet to the terminal.
  • Step S404 the second network element receives the transmission status of the data packet fed back by the terminal
  • Step S406 The second network element feeds back the transmission status to the first network element, and triggers the first network element to generate the first indication information according to the transmission status, where the first indication information is used to indicate that the data packet sent to the terminal is not yet successful.
  • the network element discards the data packet indicated by the first indication information.
  • the first network element can delete the data packet by using the second network element that does not successfully transmit the data packet according to the transmission status, thereby avoiding The number of successful transmissions
  • the second network element of the packet transmits a new data packet
  • the second network element that has not successfully transmitted the data packet is still transmitting the data packet that is not successfully transmitted, so that multiple second network elements can synchronously transmit the data, so that the solution can be solved.
  • the problem that the transmission data is not synchronized when a plurality of second network elements send data packets to the terminal ensures synchronization of data transmission between the plurality of second network elements, thereby improving reliability of data transmission.
  • the first indication information is used to indicate that the second network element that has sent the data packet to the terminal that has not succeeded to discard the data packet indicated by the first indication information includes at least one of the following: the first indication information is used to indicate that the data is sent to the terminal.
  • the second network element that has not succeeded in the packet deletes the data packet indicated by the first indication information, and the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not sent a null data packet to the terminal.
  • the method further includes: adding, by the second network element, empty packet indication information, where the empty packet indication information is used to indicate sending The data packet to the terminal is a null data packet; the second network element sends the data packet to the terminal, so that the terminal deletes a packet data unit (Packet Data Unit, PDU for short) or a PDU segment corresponding to the null data packet in the cache.
  • PDU Packet Data Unit
  • the first indication information is further used to indicate a sequence number of the one or more data packets that need to be transmitted by the at least two second network elements.
  • the first indication information includes at least one of the following: a sequence number of the data packet, a sequence of the data packet sequence number, an interval segment of the sequence number corresponding to the data packet, and a plurality of interval segment lists.
  • the first network element generates first indication information according to the state feedback information of the second network element, where the first indication information is used to instruct the second network element to delete the specified data packet.
  • the sending status feedback information includes at least one of the following: a transmission status of the second network element data, and a sequence number of the next newly transmitted data packet.
  • the first network element may indicate that the other second network element that failed to send the data packet deletes the data packet successfully received by the first network element.
  • the information of the empty packet may be notified to the terminal by using control signaling.
  • FIG. 5 is a second flowchart of a data packet transmission method according to an embodiment of the present disclosure. As shown in FIG. 5, the flow includes the following steps:
  • Step S502 the second network element receives the data packet sent by the first network element.
  • Step S504 the second network element generates second indication information according to the receiving state of the data packet
  • Step S506 The second network element sends the second indication information to the first network element, where the second indication information is used to indicate the receiving status of the data packet.
  • the second network element can feed back the data packet receiving state to the first network element by using the second indication information, so that the first network element can know the transmission state of the data packet, and avoid the first time when the data packet transmission succeeds.
  • the network element repeatedly transmits the data packet to ensure the reliability of data transmission between the first network element and the second network element, thereby ensuring the reliability of the second network element transmitting data to the terminal. Therefore, the problem that the transmission data is not synchronized when the data packets are sent to the terminal by the plurality of second network elements in the related art can be solved, the synchronization of the data transmitted between the plurality of second network elements is ensured, and the reliability of the data transmission is improved.
  • the second indication information is further used to indicate a sequence number of one or more data packets that need to be transmitted by the second network element.
  • the second indication information is transmitted on an interface between the second network element and the first network element.
  • FIG. 6 is a third flowchart of a data packet transmission method according to an embodiment of the present disclosure. As shown in FIG. 6, the flow includes the following steps:
  • Step S602 the first network element sends the same data packet to the at least two second network elements.
  • step S604 the first network element receives the third indication information that is sent by the second network element that successfully receives the data packet in the at least two second network elements, where the third indication information is used to indicate that the first network element is deleted. a data packet successfully sent by another second network element in the two second network elements;
  • Step S606 The first network element deletes the same data packet that has not been successfully sent to other second network elements in the at least two second network elements according to the third indication information.
  • the second network element that successfully receives the data packet feeds back the first indication information of the data packet for indicating that the second network element has not been successfully sent to the first network element, thereby avoiding successful transmission of the data packet.
  • the first network element repeatedly transmits the old data packet, so that when the first network element transmits a new data packet to the second network element that successfully transmits the data packet, the first network element still transmits to the second network element of the unsuccessfully transmitted data packet.
  • the old data packet guarantees the synchronization of the data packets transmitted to the terminal.
  • the problem that the transmission data is not synchronized when the data packets are sent to the terminal by the plurality of second network elements in the related art can be solved, the synchronization of the data transmitted between the plurality of second network elements is ensured, and the reliability of the data transmission is improved.
  • the third indication information is further used to indicate a sequence number of the one or more data packets that need to be transmitted by the at least two second network elements.
  • the third indication information is transmitted on an interface between the at least two second network elements and the first network element.
  • the method further includes: after the second network element successfully receives the data packet of the first network element, the second network element indicates, by using the fourth indication information, that the first network element deletes the data packet to be sent by the other second network element. .
  • the interface between the first network element and the second network element in the foregoing embodiment may be a fronthaul interface.
  • the foregoing two methods may be regarded as a sending end and a receiving end respectively, wherein the sending end function includes: generating, discarding or generating an empty data packet of the first indication information, and transmitting the null packet to the receiving end.
  • the receiving end function includes: receiving a null data packet, discarding or deleting a PDU or a PDU segment in a buffer corresponding to the null data packet sequence number.
  • FIG. 1 is a schematic diagram of a fronthaul interface between a first network element and a second network element in the related art.
  • the information exchanges between the first network element and the second network element through the front-end fronthaul interface.
  • the fronthaul may be an ideal fronthaul or a non-ideal fronthaul.
  • the ideal fronthaul transmission delay is relatively small, such as tens to hundreds of microseconds, and the non-ideal fronthaul transmission delay is relatively large, such as milliseconds.
  • the first network element is caused by the distinction between ideal and non-ideal fronthaul.
  • the second network element has different functional divisions, that is, in the case of non-ideal fronthaul transmission, the delay-sensitive user plane function, such as the function closely related to scheduling, needs to be placed in the second network element, and the delay requirement is not sensitive.
  • Functions such as header compression, encryption, and integrity contain are placed in the first network element to meet the transmission delay requirements.
  • FIG. 2 is a schematic diagram of a first network element connected to a plurality of second network elements in the related art.
  • the first user plane entity is located in the first network element
  • the second user plane entity and the third user plane entity are located in the second network element
  • the first network element and the second network element are connected through the fronthaul interface, for example,
  • the fronthaul interface for example,
  • multiple second network elements are centrally controlled by the first network element, and there is no direct interface between the second network elements.
  • the second network element (DU1) and the second network element (DU2) are used to distinguish the two different numbers. Two network elements.
  • the first user plane entity function is similar to the Packet Data Convergence Protocol (PDCP) of the LTE system and its function enhancement
  • the second user plane entity is similar to the radio link control of the LTE system (Radio Link Control).
  • RLC Radio Link Control
  • the third user plane entity is similar to the Medium Access Control (MAC) and its function enhancement of the LTE system.
  • FIG. 2 only illustrates a case where a first network element is connected to multiple second network elements, and the first network element only includes the first user plane entity, and the second network element only includes the second user plane. Entity and third user plane entity.
  • FIG. 7 is a schematic diagram of a connection architecture between a network element and a terminal according to an embodiment of the present disclosure. As shown in FIG. 7, two scenarios are included, one is data packet transmission between the first network element and the second network element, and the other is data packet transmission between the second network element and the terminal, and the first indication is The indication control of information can improve the data transmission efficiency and transmission reliability.
  • the first network element sends the same data packet to the two second network elements at the same time, and the second network element (DU1) successfully sends the first indication information to the first network element after successfully receiving the data packet of the first network element.
  • the first indication information is used to indicate that the first network element discards or deletes a data packet that is not successfully sent to the second network element (DU2) but has been successfully sent to the second network element (DU1).
  • the first indication information is further used to indicate whether the first network element performs data packet retransmission or data packet new transmission.
  • the second network element (DU1) sends the transmission status feedback information of the data packet to the terminal to the first network element.
  • the first network element generates first indication information according to the state feedback information of the DU1, and instructs the second network element (DU2) to delete the data packet that has been successfully sent to the terminal but the DU2 has not been successfully transmitted by the second network element (DU1).
  • the first indication information may be one of the following: a serial number, a serial number list, an interval segment, and a plurality of interval segment lists.
  • the second network element transmits the received data packet to the terminal.
  • the first network element instructs the second network element (DU2) to discard or delete the data that has not been successfully transmitted according to the sending status feedback information of the second network element to the terminal, so as to reach the second network element (DU1) and the second network.
  • the element (DU2) sends the purpose of data synchronization to the terminal.
  • FIG. 8 is a schematic diagram of a PDU frame structure of first indication information transmitted between a first network element and a second network element according to an embodiment of the present disclosure.
  • the indication information packet may include at least one of the following: data packet type information, data packet length indication information, and a sequence number corresponding to the data packet.
  • the first indication information may be one of the following: a serial number, a serial number list, an interval segment, and a plurality of interval segment lists.
  • FIG. 9 is a first schematic diagram of a PDU frame structure of a null data packet transmitted between a second network element and a terminal according to an embodiment of the present disclosure.
  • the PDU frame structure adopts a frame structure similar to the RLC, and the null packet indication information is added to the PDU header information to indicate that the data content corresponding to the sequence number is empty.
  • the PDU header information further includes at least one of the following: segmentation and/or re-segmentation indication information, a sequence number, one or more length indication information, and a segmentation offset.
  • FIG. 10 is a second schematic diagram of a PDU frame structure of a null data packet transmitted between a second network element and a terminal according to an embodiment of the present disclosure.
  • the PDU frame structure adopts a frame structure similar to that of the RLC, and the PDU header information includes at least one of the following: segmentation and/or re-segment indication information, sequence number, and one or more length indication information. , segmentation offset.
  • the length indication information may be set to “0” to indicate that the serial number corresponds to an empty packet.
  • FIG. 11 is a first schematic diagram of a first indication information generation process according to an embodiment of the present application.
  • This embodiment is to explain how the first indication information is generated, and the related operation after the second network element receives the first indication information.
  • the scenario can be applied to a scenario in which the reliability of the data transmission is high and the transmission delay is low.
  • an Ultra-Reliable and Low Latency Communications (URLLC) scenario passes through the first network element to the second network.
  • the element sends the first indication information to achieve the purpose of synchronizing data transmission between the plurality of second network elements, thereby improving data transmission efficiency.
  • the process can include the following steps.
  • the first network element CU sends the same data packet to the second network element DU1 and the second network element DU2.
  • the first network element and the second network element are connected through the fronthaul interface. , here defined as the "NGx" interface.
  • step S112 the second network element DU1 and the second network element DU2 simultaneously transmit the data packet to the terminal.
  • the data packet is a complete data packet PDU or PDU segment.
  • step S113 the terminal feeds back the unsuccessful feedback information to the second network element DU2, and feeds back the success feedback information to the second network element DU1.
  • the terminal feeds back the reception status of the data packet to the second network element DU1 and the second network element DU2, respectively.
  • the second network element DU1 reports the transmission status feedback information to the first network element.
  • the sending status feedback information includes at least one of the following: a sending status of the second network element data, and a sequence number of the next newly transmitted data packet.
  • step S115 the first network element generates first indication information according to the state feedback information of step S114, and sends the first indication information to the second network element DU2.
  • the PDU frame structure of the first indication information transmitted between the first network element and the second network element is as shown in FIG. 8.
  • the first indication information may be one of the following: a serial number, a serial number list, an interval segment, and a plurality of interval segment lists.
  • the first indication information is used to indicate that the second network element deletes the data packet indicated by the first indication information, and/or the first indication information is used to indicate the next newly transmitted data packet sequence of the second network element. number.
  • Step S116 The second network element DU2 deletes the specified data packet according to the indication of the first indication information.
  • the deleting may be to discard the data packet or set the data packet as an empty packet.
  • FIG. 12 is a second schematic diagram of a first indication information generation process according to an embodiment of the present disclosure.
  • the difference between FIG. 12 and FIG. 11 is that the terminal generates first indication information according to the receiving state of the second network element data packet, where the first indication information is used to indicate that the second network element deletes and sends the specified data packet.
  • the process can include the following steps.
  • step S121 the first network element CU simultaneously transmits the same data packet to the second network element DU1 and the second network element DU2.
  • step S122 the second network element DU1 and the second network element DU2 send a data packet to the terminal.
  • step S123 the terminal generates status feedback information.
  • the terminal generates first indication information according to the affirmative determination status information on the successful link, where the first indication information is set to instruct the second network element to delete the data packet indicated by the first indication information.
  • the method for generating the state feedback by the terminal includes performing XOR processing on the receiving state of the data on the two links to generate new state feedback information.
  • the terminal generates status report information for each link.
  • step S124 the terminal sends the first indication information to the second network element DU2, and sends the reception success feedback information to the second network element DU1.
  • the PDU frame structure of the first indication information transmitted between the first network element and the second network element is as shown in FIG. 8.
  • the first indication information may be one of the following: a serial number, a serial number list, an interval segment, and a plurality of interval segment columns table.
  • the first indication information is used to indicate that the second network element deletes the data packet indicated by the first indication information, and/or the first indication information is used to indicate the next newly transmitted data packet of the second network element. serial number.
  • the terminal if the terminal receives correctly on a second network element, the terminal sends a positive acknowledgement message to the two second network elements.
  • the terminal feeds back the status information according to the respective receiving states, so that the DU that has not been successfully transmitted will perform the retransmission of the data packet.
  • the synchronization problem of the data transmission may be solved by the method shown in FIG.
  • Step S125 The second network element DU2 deletes the data packet according to the indication of the first indication information.
  • the deleting may be to discard the data packet or set the data packet as an empty packet.
  • FIG. 13 is a schematic diagram showing that a data packet is an empty packet by adding a null packet indication information in a data packet according to an embodiment of the present disclosure.
  • this embodiment is to explain that the second network element adds an empty packet indication to the PDU, and the terminal performs the discarding or deleting operation of the data packet according to the empty packet indication information in the PDU header, and may include the following steps.
  • step S131 the first network element CU simultaneously transmits the same data packet to the second network element DU1 and the second network element DU2.
  • the first network element and the second network element are connected through a fronthaul interface.
  • the term is defined as an "NGx" interface.
  • step S132 the second network element DU1 and the second network element DU2 simultaneously transmit the data packet to the terminal.
  • the data packet is a complete data packet PDU or PDU segment.
  • step S133 the terminal feeds back the unsuccessful feedback information to the second network element DU2, and feeds back the success feedback information to the second network element DU1.
  • the terminal feeds back the receiving status of the data packet to the second network element DU1 and the second network element DU2, respectively.
  • step S134 the second network element DU1 reports the transmission status feedback information to the first network element.
  • the first network element In step S135, the first network element generates first indication information according to the state feedback information of step S134, and sends the first indication information to the second network element DU2.
  • the sending status feedback information includes at least one of the following: a sending status of the second network element data, and a sequence number of the next newly transmitted data packet.
  • the first indication information may be one of the following: a serial number, a serial number list, an interval segment, and a plurality of interval segment lists.
  • the first indication information is used to indicate that the second network element deletes the data packet indicated by the first indication information, and/or the first indication information is used to indicate the next newly transmitted data packet of the second network element. serial number.
  • Step S136 The second network element DU2 generates an empty data packet according to the indication of the first indication information.
  • the second network element DU2 adds the null packet indication information to the PDU header information, and the PDU frame structure of the null data packet is as shown in FIG. 9.
  • the second network element DU2 sets the length indication information in the PDU header to “0”, indicating that the data packet is a null packet, and the PDU frame structure is as shown in FIG. 10 .
  • the second network element DU2 discards the data packet indicated by the first indication information according to the indication of the first indication information.
  • Step S137 The second network element DU2 sends a null packet to the terminal.
  • the terminal after receiving the null packet, deletes the local data PDU or PDU segment corresponding to the null packet sequence number.
  • FIG. 14 is a schematic diagram of telling a terminal that a data packet is a null packet by a control signaling configuration according to an embodiment of the present disclosure. 14 is different from FIG. 13 in that the information of the empty packet is notified to the terminal by control signaling, which may include the following steps.
  • step S141 the first network element CU simultaneously transmits the same data packet to the second network element DU1 and the second network element DU2.
  • the first network element and the second network element are connected through a fronthaul interface.
  • the term is defined as an "NGx" interface.
  • step S142 the second network element DU1 and the second network element DU2 simultaneously transmit the data packet to the terminal.
  • the data packet is a complete data packet PDU or PDU segment.
  • step S143 the terminal feeds back the unsuccessful feedback information to the second network element DU2, and feeds back the success feedback information to the second network element DU1.
  • the terminal feeds back the receiving status of the data packet to the second network element DU1 and the second network element DU2, respectively.
  • step S144 the second network element DU1 reports the transmission status feedback information to the first network element.
  • the first network element In step S145, the first network element generates first indication information according to the state feedback information of step S144, and sends the first indication information to the second network element DU2.
  • the sending status feedback information includes at least one of the following: a sending status of the second network element data, and a sequence number of the next newly transmitted data packet.
  • the first indication information may be one of the following: a serial number, a serial number list, an interval segment, and a plurality of interval segment lists.
  • the first indication information is used to indicate that the second network element deletes the data packet indicated by the first indication information, and/or the first indication information is used to indicate the next newly transmitted data packet of the second network element. serial number.
  • step S146 the second network element DU2 generates an empty data packet according to the indication of the first indication information.
  • the second network element DU2 adds the null packet indication information to the PDU header information, and the PDU frame structure of the null data packet is as shown in FIG. 9.
  • the second network element DU2 discards the data packet indicated by the first indication information according to the indication of the first indication information.
  • the network element configuration terminal performs reception of an empty packet.
  • the configuration information includes at least one of the following: L3 control signaling, L2 control signaling, and L1 control signaling.
  • the L3 control signaling may be a Radio Resource Control (RRC) control signaling;
  • the L2 control signaling may be a MAC CE;
  • the L1 control signaling may be a physical layer control signaling (such as a physical downlink control channel). (Physical Downlink Control Channel, abbreviated as PDCCH) or ePDCCH).
  • RRC Radio Resource Control
  • PDCCH Physical Downlink Control Channel
  • ePDCCH Physical Downlink Control Channel
  • step S148 the second network element DU2 sends a null packet to the terminal.
  • the terminal after receiving the null packet, deletes the local data PDU or PDU segment corresponding to the null packet sequence number.
  • FIG. 15 is a flowchart of a downlink data transmission processing according to an embodiment of the present disclosure.
  • the first network element is a CU
  • the second network element is a DU
  • the interface between the CU and the DU is called an NGx interface
  • the NGx-C is a forward interface control plane
  • the NGx-U is a forward interface user. surface.
  • the embodiment should be configured to send the downlink data of the UE to multiple CUs in the downlink data transmission process. After one of the DUs successfully receives the data of the CU, the CU discards or deletes the CU.
  • the second network element (such as DU2) has successfully sent the data packet to the second network element (such as DU1), thereby improving data transmission efficiency.
  • the process can include the following steps.
  • step S151 the CU sends a "data transmission message" to the DU, and the serial number of the packet to be sent through the NGx-U
  • the information tells the DU that the DU saves the information and can be set to detect packet loss on the forward interface.
  • the DU After receiving the data packet sent by the CU through the NGx-U, the DU immediately informs the CU that the current data packet has been successfully received by the forward interface by using the first indication information.
  • the CU After the CU obtains the notification message in step S153, if the data packet has not been sent yet in other branches, the packet is discarded or replaced with an empty packet. The CU relies on the packet sequence number in step S151 to confirm which packet has been successfully received by the DU.
  • FIG. 16 is a schematic flowchart of an uplink data transmission process according to an embodiment of the present disclosure.
  • the first network element is a CU
  • the second network element is a DU
  • the interface between the CU and the DU is called an NGx interface
  • the NGx-C is a forward interface control plane
  • the NGx-U is a forward interface user. surface.
  • the embodiment is applied to the scenario in which the uplink data is sent to the CU by the multiple DUs in the uplink data transmission process.
  • the CU instructs the other second network element (such as the DU2) to discard. Or delete the data packets that the CU has successfully received, thereby improving data transmission efficiency.
  • the process can include the following steps.
  • step S161 the DU sends the uplink data to the CU through the NGx-U.
  • the CU After receiving the uplink data packet sent by the certain DU in step S162, the CU notifies the other DUs that provide the data transmission service for the UE, and the current data packet has been successfully received through the forward interface.
  • the DU uplink data may also be notified that the data has been successfully received.
  • step S163 after receiving the notification, the other DU discards the packet or replaces it with an empty packet.
  • the DU relies on the packet sequence number in step S161 to confirm which packet has been successfully received.
  • the data packet sequence number herein may be a PDCP SN number or an RLC SN number or a newly defined user plane interface serial number, where the sequence number Sequence Number is simply referred to as SN.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present disclosure which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM).
  • the instructions include a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present disclosure.
  • a data packet transmission device is also provided in this embodiment, and the device is configured to implement the foregoing embodiments and preferred embodiments, and details are not described herein.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 17 is a block diagram showing the structure of a data packet transmission apparatus according to an embodiment of the present disclosure. As shown in FIG. 17, the apparatus includes:
  • the first sending module 172 is configured to send a data packet to the terminal;
  • the first receiving module 174 is connected to the first sending module 172, and is configured to receive a transmission state of the data packet fed back by the terminal;
  • the triggering module 176 is connected to the first receiving module 174, and is configured to feed back the transmission status to the first network element and trigger the first network element to generate first indication information according to the transmission status, where the first indication information is used to indicate sending to the terminal.
  • the second network element whose data packet has not been successfully discarded discards the data packet indicated by the first indication information.
  • the first indication information is used to indicate that the second network element that has sent the data packet to the terminal that has not succeeded to discard the data packet indicated by the first indication information includes at least one of the following: the first indication information is used to indicate that the data is sent to the terminal.
  • the second network element that has not succeeded in the packet deletes the data packet indicated by the first indication information, and the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not sent a null data packet to the terminal.
  • the triggering module 176 is further configured to: when the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not succeeded, send the null data packet to the terminal, and the second network element sends the data packet to the terminal. If the information is sent to the first network element and the first network element is triggered to generate the first indication information according to the transmission status, the empty packet indication information is added to the data packet, where the empty packet indication information is used to indicate the sending.
  • the data packet to the terminal is an empty data packet; and the data packet is sent to the terminal, so that the terminal deletes the packet data unit PDU or PDU segment corresponding to the null data packet in the buffer.
  • the first indication information is further used to indicate a sequence number of the one or more data packets that need to be transmitted by the at least two second network elements.
  • the first indication information includes at least one of the following: a sequence number of the data packet, a sequence of the data packet sequence number, an interval segment of the sequence number corresponding to the data packet, and a plurality of interval segment lists.
  • FIG. 18 is a block diagram showing the structure of a data packet transmission apparatus according to an embodiment of the present disclosure.
  • the apparatus includes: a second receiving module 182 configured to receive a data packet sent by the first network element; and a generating module 184.
  • the second receiving module 182 is configured to generate the second indication information according to the receiving state of the data packet.
  • the second sending module 186 is connected to the generating module 184, and configured to send the second indication information to the first network element, where The second indication information is used to indicate a receiving status of the data packet.
  • the second indication information is further used to indicate a sequence number of one or more data packets that need to be transmitted by the second network element.
  • the second indication information is transmitted on an interface between the second network element and the first network element.
  • FIG. 19 is a structural block diagram 3 of a data packet transmission apparatus according to an embodiment of the present disclosure.
  • the apparatus includes: a third sending module 192, configured to send the same data packet to at least two second network elements;
  • the third receiving module 194 is connected to the third sending module 192, and is configured to receive third indication information that is sent by the second network element that successfully receives the data packet in the at least two second network elements, where the third indication information is used.
  • the deleting module 196 is connected to the third receiving module 194, and is configured to delete the other data that has not been sent to the at least two second network elements according to the third indication information.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors.
  • Embodiments of the present disclosure also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps: S1, the second network element sends a data packet to the terminal; and S2, the second network element receives the data fed back by the terminal. a transmission state of the packet; S3, the second network element feeds back the transmission status to the first network element, and triggers the first network element to generate the first indication information according to the transmission status, where the first indication information is used to indicate that the data packet is sent to the terminal. The successful second network element discards the data packet indicated by the first indication information.
  • the storage medium is further configured to store program code for performing the following steps: S1, the first indication information is used
  • the second network element that indicates that the first network information is discarded by the second network element that has not sent the data packet to the terminal includes at least one of the following: the first indication information is used to indicate that the second network element that the data packet has not been successfully sent to the terminal is sent. Deleting the data packet indicated by the first indication information, where the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not sent a null data packet to the terminal.
  • the storage medium is further configured to store program code for: transmitting, by the first indication information, the second network element that is not successful in transmitting the data packet to the terminal, to the terminal, and sending the null data packet to the terminal and the second After the network element sends the data packet to the terminal, the second network element is in the data after the first network element is sent to the first network element and the first network element is triggered to generate the first indication information according to the transmission status.
  • the empty packet indication information is added to the packet, where the empty packet indication information is used to indicate that the data packet sent to the terminal is an empty data packet; S2, the second network element sends the data packet to the terminal, so that the terminal deletes the cached and empty data packets.
  • Corresponding packet data unit PDU or PDU segment corresponds the first indication information
  • the storage medium is further configured to store program code for performing the following steps: S1, the first indication information is further used to indicate a sequence number of one or more data packets that need to be transmitted by the at least two second network elements .
  • the storage medium is further configured to store program code for performing the following steps: S1, the first indication information includes at least one of: a serial number of the data packet, a list of the serial number of the data packet, and a sequence corresponding to the data packet. The interval segment of the number and the list of multiple interval segments.
  • Embodiments of the present disclosure also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps: S1, the second network element receives the data packet sent by the first network element; S2, the second network element is configured according to The receiving status of the data packet generates the second indication information; S3, the second network element sends the second indication information to the first network element, where the second indication information is used to indicate the receiving status of the data packet.
  • the storage medium is further configured to store program code for performing the following steps: S1, the second indication information is further used to indicate a sequence number of the one or more data packets that need to be transmitted by the second network element.
  • the storage medium is further arranged to store program code for performing the step of: S1, the second indication information being transmitted on an interface between the second network element and the first network element.
  • Embodiments of the present disclosure also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps: S1, the first network element sends the same data packet to at least two second network elements; S2, Receiving, by the network element, the third indication information that is sent by the second network element that successfully receives the data packet in the at least two second network elements, where the third indication information is used to indicate that the first network element is deleted from the other second network element The data packet that is successfully sent; S3, the first network element deletes the same data packet that has not been successfully sent to the other second network element in the at least two second network elements according to the third indication information.
  • the storage medium is further configured to store program code for performing the following steps: S1, the third indication information is further configured to indicate a sequence number of the one or more data packets that need to be transmitted by the at least two second network elements .
  • the storage medium is further arranged to store program code for performing the step of: S1, the third indication information being transmitted on an interface between the at least two second network elements and the first network element.
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor is configured to: according to the stored program code in the storage medium, the second network element sends a data packet to the terminal; and the second network element receives the data packet that is fed back by the terminal. Transmitting a state of the second network element to the first network element and triggering the first network element to generate first indication information according to the transmission status, where the first indication information is used to indicate a direction The second network element that the terminal sends the data packet has not succeeded, and discards the data packet indicated by the first indication information.
  • the processor performs, according to the stored program code in the storage medium, the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not been successfully discarded.
  • the data packet indicated by the first indication information includes at least one of the following: the first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not successfully deleted the data packet indicated by the first indication information, The first indication information is used to indicate that the second network element that has sent the data packet to the terminal has not sent a null data packet to the terminal.
  • the processor performs, according to the stored program code in the storage medium, the second indication, where the first indication information is used to indicate that the data packet is not successfully sent to the terminal, to the terminal.
  • Sending a null data packet and if the second network element sends the data packet to the terminal, the transmission state is fed back to the first network element, and the first network element is triggered according to the transmission.
  • the second network element adds null packet indication information to the data packet, where the null packet indication information is used to indicate that the data packet sent to the terminal is empty. a data packet; the second network element sends the data packet to the terminal, so that the terminal deletes a packet data unit PDU or a PDU segment corresponding to the null data packet in the cache.
  • the processor is executed according to the stored program code in the storage medium: the first indication information is further used to indicate that one or more of the at least two second network elements need to be transmitted.
  • the serial number of the packet is the serial number of the packet.
  • the processor is executed according to the stored program code in the storage medium: the first indication information includes at least one of the following: a serial number of the data packet, a serial number list of the data packet, and a data packet. The interval segment of the corresponding serial number and the list of multiple interval segments.
  • the processor executes, according to the stored program code in the storage medium, the second network element receives the data packet sent by the first network element, and the second network element generates the data packet according to the received state of the data packet.
  • the second indication information is sent by the second network element to the first network element, where the second indication information is used to indicate the receiving status of the data packet.
  • the processor is executed according to the stored program code in the storage medium: the second indication information is further used to indicate that the second network element has one or more data packets that need to be transmitted. serial number.
  • the processor performs, according to the stored program code in the storage medium, the second indication information is transmitted on an interface between the second network element and the first network element.
  • the processor is configured to: according to the stored program code in the storage medium, the first network element sends the same data packet to the at least two second network elements; the first network element receives the at least two The third indication information that is received by the second network element of the data packet is successfully received by the second network element, where the third indication information is used to indicate that the first network element is deleted from the other second The data packet successfully sent by the network element; the first network element deletes the same data packet that has not been successfully sent to the other second network element in the at least two second network elements according to the third indication information.
  • the processor executes according to the stored program code in the storage medium: the third indication
  • the information is further used to indicate a sequence number of the one or more data packets that need to be transmitted by the at least two second network elements.
  • the processor performs, according to the stored program code in the storage medium, an interface between the at least two second network elements and the first network element. Transfer on.
  • modules or steps of the present disclosure described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. As such, the disclosure is not limited to any specific combination of hardware and software.

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Abstract

本公开提供了一种数据包传输方法及装置，该方法包括：第一网元根据第二网元向第一网元反馈的传输状态生成第一指示信息，其中，所述第一指示信息用于指示向终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包。通过本公开，可以解决相关技术中通过多个第二网元向终端发送数据包时传输数据不同步的问题。

Description

数据包传输方法及装置 技术领域
本公开涉及通信领域，具体而言，涉及一种数据包传输方法及装置。
背景技术
第五代移动通信(Fifth Generation，5G)移动通信中，海量连接，用户更高的速率要求，对长期演进(Long Term Evolution，简称为LTE)中基于带宽的单元(Bandwidth Based Unit，简称为BBU)与再生中继单元(Regenerative Repeater Unit，简称为RRU)之间的通用公共无线电接口(Common Public Radio Interface，简称为CPRI)的传输容量提出了极大挑战，由于CPRI接口传输的是经过物理层编码调制等处理后的IQ信号，CPRI接口对传输时延迟和带宽都有较大的要求。如果在5G空口速率提升到数十Gbps后，CPRI接口的流量需求将上升到Tbps级别，对网络部署成本和部署难度都带来了巨大的压力。因此，在5G中，需要重新定义前传接口的划分方式，在前传接口的划分方式中，从传输容量、传输时延、方便部署等几方面进行考虑，比如考虑到非理想fronthaul传输，将时延不敏感的网络功能放在第一网元(比如集中处理单元(Centralized Unit，简称为CU)中)，将时延敏感的网络功能放在第二网元(比如分布式处理单元(Distributed Unit，简称为DU)中)，第一网元与第二网元之间通过理想或非理想fronthaul进行传输。其中，第一网元与第二网元间的fronthaul接口如图1所示。
为了提高传输可靠性，提高传输效率，实现场景之一是一个第一网元连接两个及其以上第二网元，如图2所示，第一网元将UE的数据包同时发送给多个第二网元，这首先可以保障第一网元与第二网元之间传输的可靠性和传输效率，提高第二网元与终端之间数据传输的可靠性和传输效率，在图2中，只有两个第二网元都保证向终端一定发送成功的情况下，才能很好的保持两个第二网元传输数据包的同步。如果针对相同的数据包，其中一个第二网元发送成功了，另一个第二网元发送还未成功，这时候将出现一个第二网元开始向终端传输新的数据包，另一个第二网元仍然在重传旧的数据包，最终导致两个第二网元传输的数据包不同步，无法保证数据包同时在两个第二网元传输所带来的可靠性及传输效率增益。
发明内容
本公开实施例提供了一种数据包传输方法及装置，以至少解决相关技术中通过多个第二网元向终端发送数据包时传输数据不同步的问题。
根据本公开的一个实施例，提供了一种数据包传输方法，包括：第一网元根据第二网元向第一网元反馈的传输状态生成第一指示信息，其中，所述第一指示信息用于指示向终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包。
在一个实施例中，所述第一网元根据所述传输状态生成第一指示信息之前包括：所述第 二网元向所述终端发送数据包；所述第二网元接收所述终端反馈的所述数据包的传输状态；所述第二网元向所述第一网元反馈所述传输状态。
可选地，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包包括以下至少之一：所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元删除所述第一指示信息指示的数据包，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元向所述终端发送空数据包。
可选地，在所述第一指示信息用于指示向终端发送数据包还未成功的第二网元向所述终端发送空数据包且所述第二网元向所述终端发送数据包还未成功的情况下，在向所述第一网元反馈所述传输状态并触发所述第一网元根据所述传输状态生成第一指示信息之后，还包括：所述第二网元在所述数据包中增加空包指示信息，其中，所述空包指示信息用于指示发送给所述终端的数据包是空数据包；所述第二网元将所述数据包发送给所述终端，以便所述终端删除缓存中与所述空数据包对应的分组数据单元PDU或PDU分段。
可选地，所述第一指示信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，所述第一指示信息包括以下至少之一：一个数据包的序列号、数据包序列号列表、数据包对应的序列号的区间段、多个区间段列表。
根据本公开的另一个实施例，提供了一种数据包传输方法，包括：第二网元接收第一网元发送的数据包；第二网元根据所述数据包的接收状态生成第二指示信息；第二网元将所述第二指示信息发送给第一网元，其中，所述第二指示信息用于指示所述数据包的接收状态。
可选地，所述第二指示信息还用于指示所述第二网元下一个或多个需要传输的数据包的序列号。
可选地，所述第二指示信息在所述第二网元与所述第一网元之间的接口上传输。
根据本发明的又一个实施例，提供了一种数据包传输方法，包括：第一网元向至少两个第二网元发送相同的数据包；第一网元接收所述至少两个第二网元中成功接收所述数据包的第二网元反馈的第三指示信息，其中，所述第三指示信息用于指示所述第一网元删除还未向所述其他第二网元成功发送的数据包；第一网元根据所述第三指示信息删除还未向所述至少两个第二网元中其他第二网元成功发送的相同的数据包。
可选地，所述第三指示信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，所述第三指示信息在所述至少两个第二网元与所述第一网元之间的接口上传输。
根据本公开的又一个实施例，提供了一种数据包传输装置，包括触发模块，所述触发模块设置为触发第一网元根据第二网元向第一网元反馈的传输状态生成第一指示信息，其中，所述第一指示信息用于指示向终端发送数据包还未成功的所述第二网元丢弃所述第一指示信息指示的数据包。
在一个实施例中，所述装置还包括：第一发送模块，设置为向所述终端发送数据包；第 一接收模块，设置为接收所述终端反馈的所述数据包的传输状态；所述触发模块还设置为向所述第一网元反馈所述传输状态。
可选地，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包包括以下至少之一：所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元删除所述第一指示信息指示的数据包，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元向所述终端发送空数据包。
可选地，所述触发模块，还设置为在所述第一指示信息用于指示向终端发送数据包还未成功的第二网元向所述终端发送空数据包且所述第二网元向所述终端发送数据包还未成功的情况下，在向所述第一网元反馈所述传输状态并触发所述第一网元根据所述传输状态生成第一指示信息之后，在所述数据包中增加空包指示信息，其中，所述空包指示信息用于指示发送给所述终端的数据包是空数据包；以及将所述数据包发送给所述终端，以便所述终端删除缓存中与所述空数据包对应的分组数据单元PDU或PDU分段。
可选地，所述第一指示信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，所述第一指示信息包括以下至少之一：一个数据包的序列号、数据包序列号列表、数据包对应的序列号的区间段、多个区间段列表。
根据本公开的又一个实施例，提供了一种数据包传输方法，包括：第二接收模块，设置为接收第一网元发送的数据包；生成模块，设置为根据所述数据包的接收状态生成第二指示信息；第二发送模块，设置为将所述第二指示信息发送给第一网元，其中，所述第二指示信息用于指示所述数据包的接收状态。
可选地，所述第二指示信息还用于指示所述第二网元下一个或多个需要传输的数据包的序列号。
可选地，所述第二指示信息在所述第二网元与所述第一网元之间的接口上传输。
根据本公开的又一个实施例，提供了一种数据包传输装置，包括：第三发送模块，设置为向至少两个第二网元发送相同的数据包；第三接收模块，设置为接收所述至少两个第二网元中成功接收所述数据包的第二网元反馈的第三指示信息，其中，所述第三指示信息用于指示所述第一网元删除还未向所述其他第二网元成功发送的数据包；删除模块，设置为根据所述第三指示信息删除还未向所述至少两个第二网元中其他第二网元成功发送的相同的数据包。
可选地，所述第三指示信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，所述第三指示信息在所述至少两个第二网元与所述第一网元之间的接口上传输。
根据本公开的又一个实施例，还提供了一种存储介质。该存储介质设置为存储用于执行以下步骤的程序代码：第二网元向终端发送数据包；所述第二网元接收所述终端反馈的所述数据包的传输状态；所述第二网元向第一网元反馈所述传输状态并触发所述第一网元根据所 述传输状态生成第一指示信息，其中，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包包括以下至少之一：所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元删除所述第一指示信息指示的数据包，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元向所述终端发送空数据包。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：在所述第一指示信息用于指示向终端发送数据包还未成功的第二网元向所述终端发送空数据包且所述第二网元向所述终端发送数据包还未成功的情况下，在向所述第一网元反馈所述传输状态并触发所述第一网元根据所述传输状态生成第一指示信息之后，还包括：所述第二网元在所述数据包中增加空包指示信息，其中，所述空包指示信息用于指示发送给所述终端的数据包是空数据包；所述第二网元将所述数据包发送给所述终端，以便所述终端删除缓存中与所述空数据包对应的分组数据单元PDU或PDU分段。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：所述第一指示信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：所述第一指示信息包括以下至少之一：一个数据包的序列号、数据包序列号列表、数据包对应的序列号的区间段、多个区间段列表。
根据本公开的又一个实施例，还提供了一种存储介质。该存储介质设置为存储用于执行以下步骤的程序代码：第二网元接收第一网元发送的数据包；第二网元根据所述数据包的接收状态生成第二指示信息；第二网元将所述第二指示信息发送给第一网元，其中，所述第二指示信息用于指示所述数据包的接收状态。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：所述第二指示信息还用于指示所述第二网元下一个或多个需要传输的数据包的序列号。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：所述第二指示信息在所述第二网元与所述第一网元之间的接口上传输。
根据本公开的又一个实施例，还提供了一种存储介质。该存储介质设置为存储用于执行以下步骤的程序代码：第一网元向至少两个第二网元发送相同的数据包；第一网元接收所述至少两个第二网元中成功接收所述数据包的第二网元反馈的第三指示信息，其中，所述第三指示信息用于指示所述第一网元删除还未向所述其他第二网元成功发送的数据包；第一网元根据所述第三指示信息删除还未向所述至少两个第二网元中其他第二网元成功发送的相同的数据包。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：所述第三指示信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：所述第三指示信息在所 述至少两个第二网元与所述第一网元之间的接口上传输。
通过本公开，第二网元向终端发送数据包；第二网元接收终端反馈的数据包的传输状态；第二网元向第一网元反馈传输状态并触发第一网元根据传输状态生成第一指示信息，其中，第一指示信息用于指示向终端发送数据包还未成功的第二网元丢弃第一指示信息指示的数据包。由于第二网元向第一网元反馈了传输的数据包的传输状态，使得第一网元可以根据该传输状态指示未成功传输数据包的第二网元删除数据包，避免了在成功传输数据包的第二网元传输新的数据包时，未成功传输数据包的第二网元仍在传输未成功传输的数据包，使得多个第二网元可以同步传输数据，因此，可以解决相关技术中通过多个第二网元向终端发送数据包时传输数据不同步的问题，保证了多个第二网元间传输数据的同步，提高数据传输的可靠性。
附图说明
此处所提供的附图用来帮助对本公开的实施例的理解，构成本申请的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的限定。在附图中：
图1是相关技术中第一网元与第二网元间的fronthaul接口示意图；
图2是相关技术中第一网元连接到多个第二网元的示意图；
图3是本公开实施例的一种数据包传输方法的移动终端的硬件结构框图；
图4是根据本公开实施例的数据包传输方法的流程图一；
图5是根据本公开实施例的数据包传输方法的流程图二；
图6是根据本公开实施例的数据包传输方法的流程图三；
图7是根据本公开实施例的网元与终端之间的连接架构示意图；
图8是根据本公开实施例的第一网元与第二网元间传输的第一指示信息的PDU帧结构示意图；
图9是根据本公开实施例的第二网元与终端之间传输的空数据包的PDU帧结构示意图一；
图10根据本公开实施例的第二网元与终端之间传输的空数据包的PDU帧结构示意图二；
图11是根据本申请实施例的第一指示信息生成流程示意图一；
图12是根据本公开实施例的第一指示信息生成流程示意图二；
图13是根据本公开实施例的通过在数据包里面增加空包指示信息指示数据包为空包示意图；
图14是根据本公开实施例的通过控制信令配置告诉终端数据包为空包示意图；
图15是根据本公开实施例的下行数据发送处理流程示意图；
图16是根据本公开实施例的上行数据发送处理流程示意图；
图17是根据本公开实施例的数据包传输装置的结构框图一；
图18是根据本公开实施例的数据包传输装置的结构框图二；
图19是根据本公开实施例的数据包传输装置的结构框图三。
具体实施方式
下文中将参考附图并结合实施例来详细说明本公开。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本公开的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
实施例1
本申请实施例1所提供的方法实施例可以在移动终端、计算机终端或者类似的运算装置中执行。以运行在移动终端上为例，图3是本公开实施例的一种数据包传输方法的移动终端的硬件结构框图。如图3所示，移动终端30可以包括一个或多个(图中仅示出一个)处理器302(处理器302可以包括但不限于微处理器MCU或可编程逻辑器件FPGA等的处理装置)、设置为存储数据的存储器304、以及设置为通信功能的传输装置306。本领域普通技术人员可以理解，图3所示的结构仅为示意，其并不对上述电子装置的结构造成限定。例如，移动终端30还可包括比图3中所示更多或者更少的组件，或者具有与图3所示不同的配置。
存储器304可设置为存储应用软件的软件程序以及模块，如本公开实施例中的数据包传输方法对应的程序指令/模块，处理器302通过运行存储在存储器304内的软件程序以及模块，从而执行各种功能应用以及数据处理，即实现上述的方法。存储器304可包括高速随机存储器，还可包括非易失性存储器，如一个或者多个磁性存储装置、闪存、或者其他非易失性固态存储器。在一些实例中，存储器304可包括相对于处理器302远程设置的存储器，这些远程存储器可以通过网络连接至移动终端30。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
传输装置306设置为经由一个网络接收或者发送数据。上述的网络实例可包括移动终端30的通信供应商提供的无线网络。在一个实例中，传输装置306包括一个网络适配器(Network Interface Controller，NIC)，其可通过基站与其他网络设备相连从而可与互联网进行通讯。在一个实例中，传输装置306可以为射频(Radio Frequency，RF)模块，其设置为通过无线方式与互联网进行通讯。
在本实施例中提供了一种运行于上述移动终端的数据包传输方法，图4是根据本公开实施例的数据包传输方法的流程图一，如图4所示，该流程包括如下步骤：
步骤S402，第二网元向终端发送数据包；
步骤S404，第二网元接收终端反馈的数据包的传输状态；
步骤S406，第二网元向第一网元反馈传输状态并触发第一网元根据传输状态生成第一指示信息，其中，第一指示信息用于指示向终端发送数据包还未成功的第二网元丢弃第一指示信息指示的数据包。
通过上述步骤，由于第二网元向第一网元反馈了传输的数据包的传输状态，使得第一网元可以根据该传输状态指示未成功传输数据包的第二网元删除数据包，避免了在成功传输数 据包的第二网元传输新的数据包时，未成功传输数据包的第二网元仍在传输未成功传输的数据包，使得多个第二网元可以同步传输数据，因此，可以解决相关技术中通过多个第二网元向终端发送数据包时传输数据不同步的问题，保证了多个第二网元间传输数据的同步，提高数据传输的可靠性。
可选地，第一指示信息用于指示向终端发送数据包还未成功的第二网元丢弃第一指示信息指示的数据包包括以下至少之一：第一指示信息用于指示向终端发送数据包还未成功的第二网元删除第一指示信息指示的数据包，第一指示信息用于指示向终端发送数据包还未成功的第二网元向终端发送空数据包。
可选地，在第一指示信息用于指示向终端发送数据包还未成功的第二网元向终端发送空数据包且第二网元向终端发送数据包还未成功的情况下，在向第一网元反馈传输状态并触发第一网元根据传输状态生成第一指示信息之后，还包括：第二网元在数据包中增加空包指示信息，其中，空包指示信息用于指示发送给终端的数据包是空数据包；第二网元将数据包发送给终端，以便终端删除缓存中与空数据包对应的分组数据单元(Packet Data Unit，简称为PDU)或PDU分段。
可选地，第一指示信息还用于指示至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，第一指示信息包括以下至少之一：一个数据包的序列号、数据包序列号列表、数据包对应的序列号的区间段、多个区间段列表。
例如，第一网元根据第二网元的状态反馈信息生成第一指示信息，所述第一指示信息用于指示第二网元删除指定的数据包。所述发送状态反馈信息包括至少以下之一：第二网元数据的传输状态、下一个新传数据包的序列号。
又例如，第一网元成功接收到第二网元的数据包后，第一网元可以指示未成功发送数据包的其他第二网元删除在第一网元成功接收的数据包。
可选地，可以通过控制信令将空包的信息通知终端。
图5是根据本公开实施例的数据包传输方法的流程图二，如图5所示，该流程包括如下步骤：
步骤S502，第二网元接收第一网元发送的数据包；
步骤S504，第二网元根据数据包的接收状态生成第二指示信息；
步骤S506，第二网元将第二指示信息发送给第一网元，其中，第二指示信息用于指示数据包的接收状态。
通过上述步骤，由于第二网元通过第二指示信息将数据包接收状态反馈给第一网元，使得第一网元可以知晓数据包的传输状态，避免在数据包传输成功的时候，第一网元重复传输该数据包，可以保证第一网元与第二网元之间传输数据的可靠性，进而可以保证第二网元向终端传输数据的可靠性。因此，可以解决相关技术中通过多个第二网元向终端发送数据包时传输数据不同步的问题，保证了多个第二网元间传输数据的同步，提高数据传输的可靠性。
可选地，第二指示信息还用于指示第二网元下一个或多个需要传输的数据包的序列号。
可选地，第二指示信息在第二网元与第一网元之间的接口上传输。
图6是根据本公开实施例的数据包传输方法的流程图三，如图6所示，该流程包括如下步骤：
步骤S602，第一网元向至少两个第二网元发送相同的数据包；
步骤S604，第一网元接收至少两个第二网元中成功接收数据包的第二网元反馈的第三指示信息，其中，第三指示信息用于指示第一网元删除还未向至少两个第二网元中其他第二网元成功发送的数据包；
步骤S606，第一网元根据第三指示信息删除还未向至少两个第二网元中其他第二网元成功发送的相同的数据包。
通过上述步骤，由于成功接收数据包的第二网元向第一网元反馈了用于指示删除还未向其他第二网元成功发送的数据包第三指示信息，避免在数据包传输成功的时候，第一网元重复传输该旧数据包，使得第一网元在向成功传输数据包的第二网元传输新的数据包时，仍向未成功传输的数据包的第二网元传输旧的数据包，进而保证向终端传输数据包的同步。因此，可以解决相关技术中通过多个第二网元向终端发送数据包时传输数据不同步的问题，保证了多个第二网元间传输数据的同步，提高数据传输的可靠性。
可选地，第三指示信息还用于指示至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，第三指示信息在至少两个第二网元与第一网元之间的接口上传输。
可选地，上述方法还包括：第二网元成功接收第一网元的数据包后，第二网元通过第四指示信息指示第一网元删除在其他第二网元待发送的数据包。
可选地，上述实施例中第一网元与第二网元的接口可以为fronthaul接口。
需要说明的是，上述两种方法可以分别看作是发送端和接收端，其中，发送端功能包括：第一指示信息的生成、丢弃或生成空的数据包、将空包发送到接收端。接收端功能包括：接收空数据包、丢弃或删除与空数据包序列号对应的缓存中的PDU或PDU分段。
为了方便理解上述实施例，下面进行详细的描述。
图1是相关技术中第一网元与第二网元间的fronthaul接口示意图。如图1所示，第一网元与第二网元之间通过前传fronthaul接口进行信息交互，针对不同的时延，这里的fronthaul可以是理想fronthaul或非理想fronthaul。理想fronthaul的传输时延比较小，比如大概为几十到几百微秒，非理想fronthaul的传输时延相对较大，比如为毫秒级，由于理想和非理想fronthaul的区分，导致第一网元、第二网元有不同的功能划分，即在非理想fronthaul传输的情况下，需要把时延敏感的用户面功能如与调度紧密相关的功能放在第二网元中，时延要求不敏感如头压缩、加密和完整性包含等功能放在第一网元中，以满足传输时延要求。
图2是相关技术中第一网元连接到多个第二网元的示意图。如图2所示，第一用户面实体位于第一网元，第二用户面实体和第三用户面实体位于第二网元，第一网元与第二网元通过fronthaul接口连接，比如定义为“NGx”接口，通过第一网元集中控制多个第二网元，第二网元之间无直接接口。在图2中，用第二网元(DU1)，第二网元(DU2)来区分不同的两个第 二网元。这里的第一用户面实体功能类似于LTE系统的分组数据汇聚协议(Packet Data Convergence Protocol，简称为PDCP)及其功能增强，第二用户面实体类似于LTE系统的无线链路控制(Radio Link Control，简称为RLC)及其功能增强，第三用户面实体类似于LTE系统的媒体接入控制(Medium Access Control，简称为MAC)及其功能增强。需要说明的是，图2只为了说明一个第一网元连接多个第二网元的情况，并不限定第一网元只包含第一用户面实体，第二网元只包含第二用户面实体和第三用户面实体。
图7是根据本公开实施例的网元与终端之间的连接架构示意图。如图7所示，包括两种场景，一种是第一网元与第二网元之间的数据包传输，一种是第二网元与终端之间的数据包传输，通过第一指示信息的指示控制，能够提高数据的传输效率和传输可靠性。
第一网元在相同的时间向两个第二网元发送相同的数据包，第二网元(DU1)成功接收到第一网元的数据包后向第一网元发送第一指示信息，所述第一指示信息用于指示第一网元丢弃或删除未成功发往第二网元(DU2)但已成功发送到第二网元(DU1)的数据包。可选的，所述第一指示信息还用于指示第一网元是进行数据包重传还是进行数据包新传。
第二网元(DU1)将数据包到终端的发送状态反馈信息发送到第一网元。第一网元根据DU1的状态反馈信息生成第一指示信息，指示第二网元(DU2)删除已在第二网元(DU1)成功发送到终端但DU2还未成功发送的数据包。
其中，所述第一指示信息可以是以下之一：一个序列号、序列号列表、区间段、多个区间段列表。
在一实施例中，第二网元将接收到的数据包发送到终端。另外，第一网元根据第二网元向终端的发送状态反馈信息，指示第二网元(DU2)丢弃或删除发送还未成功的数据，以达到第二网元(DU1)和第二网元(DU2)向终端发送数据同步的目的。
图8是根据本公开实施例的第一网元与第二网元间传输的第一指示信息的PDU帧结构示意图。如图8所示，指示信息包可以括以下至少之一：数据包类型信息、数据包长度指示信息、数据包对应的序列号。所述第一指示信息可以是以下之一：一个序列号、序列号列表、区间段、多个区间段列表。
图9是根据本公开实施例的第二网元与终端之间传输的空数据包的PDU帧结构示意图一。如图9所示，PDU帧结构采用与RLC类似的帧结构，在PDU头信息中增加了空包指示信息，用于指示该序列号对应的数据内容为空。除了空数据包指示信息外，所述PDU头信息中还包括以下至少之一：分段和/或重分段指示信息、序列号、一个或多个长度指示信息、分段偏移量。
图10根据本公开实施例的第二网元与终端之间传输的空数据包的PDU帧结构示意图二。如图10所示，PDU帧结构采用与RLC类似的帧结构，所述PDU头信息中包括至少以下之一：分段和/或重分段指示信息、序列号、一个或多个长度指示信息、分段偏移量。其中，可以将长度指示信息设置为“0”，以表示该序列号对应为空包。
图11是根据本申请实施例的第一指示信息生成流程示意图一。如图11所示，为满足业务的低时延高可靠场景，需要同时对同一包数据在多条条链路传输，以提高传输的可靠性。 本实施例是为了说明第一指示信息是如何生成的，以及第二网元收到第一指示信息后的相关操作。该场景可以应用于对数据传输可靠性要求高，传输时延低的场景，比如超可靠低时延(Ultra-Reliable and Low Latency Communications，简称为URLLC)场景，通过第一网元向第二网元发送第一指示信息以达到多个第二网元之间数据传输同步的目的，提高数据传输效率。该流程可以包括以下步骤。
在步骤S111，第一网元CU同时将相同的数据包发送到第二网元DU1和第二网元DU2；其中，第一网元与第二网元之间通过fronthaul接口连接，为了方便说明，这里定义为“NGx”接口。
在步骤S112，第二网元DU1和第二网元DU2同时将数据包发送到终端。所述数据包为完整的数据包PDU或PDU分段。
在步骤S113，终端向第二网元DU2反馈接收未成功反馈信息，向第二网元DU1反馈接收成功反馈信息。终端分别向第二网元DU1和第二网元DU2反馈数据包的接收状态。
在步骤S114，第二网元DU1向第一网元报告发送状态反馈信息。其中，发送状态反馈信息包括至少以下之一：第二网元数据的发送状态、下一个新传数据包的序列号。
在步骤S115，第一网元根据步骤S114的状态反馈信息生成第一指示信息，并发送第一指示信息到第二网元DU2。其中，第一网元与第二网元之间传输的第一指示信息的PDU帧结构如图8所示。例如，第一指示信息可以是以下之一：一个序列号、序列号列表、区间段、多个区间段列表。
上述第一指示信息用于指示第二网元删除所述第一指示信息所指示的数据包，和/或，所述第一指示信息用于指示第二网元下一个新传的数据包序列号。
步骤S116：第二网元DU2根据第一指示信息的指示删除指定的数据包。
可选地，上述删除可以是将数据包丢弃，或者将数据包设置为空包。
图12是根据本公开实施例的第一指示信息生成流程示意图二。图12与图11的不同之处在于终端根据对第二网元数据包的接收状态生成第一指示信息，所述第一指示信息用于指示第二网元删除发送指定的数据包。该流程可包括以下步骤。
在步骤S121，第一网元CU同时将相同的数据包发送到第二网元DU1和第二网元DU2。
在步骤S122，第二网元DU1和第二网元DU2发送数据包到终端。
在步骤S123，终端生成状态反馈信息。终端根据成功链路上的肯定确定状态信息生成第一指示信息，所述第一指示信息设置为指示第二网元删除所述第一指示信息所指示的数据包。
可选的，所述终端生成状态反馈的方法包括根据对两条链路上的数据的接收状态进行异或处理，生成新的状态反馈信息。
可选的，终端针对每条链路各自生成状态报告信息。
在步骤S124，终端向第二网元DU2发送第一指示信息，向第二网元DU1发送接收成功反馈信息。其中，第一网元与第二网元之间传输的第一指示信息的PDU帧结构如图8所示。
所述第一指示信息可以是以下之一：一个序列号、序列号列表、区间段、多个区间段列 表。
所述第一指示信息用于指示第二网元删除所述第一指示信息所指示的数据包，和/或，所述第一指示信息用于指示第二网元下一个新传的数据包序列号。
可选的，如果终端在一个第二网元上接收正确，则终端向两个第二网元都发送肯定确认消息。
可选的，终端根据各自的接收状态反馈状态信息，这样传输还未成功的DU将进行数据包的重传，这种情况，可以通过图11所示方法来解决数据传输的同步问题。
步骤S125：第二网元DU2根据第一指示信息的指示删除数据包。
可选地，上述删除可以是将数据包丢弃，或者将数据包设置为空包。
图13是根据本公开实施例的通过在数据包里面增加空包指示信息指示数据包为空包示意图。如图13所示，本实施例是为了说明第二网元在PDU中增加空包指示，终端根据PDU头中的空包指示信息进行数据包的丢弃或删除操作，可包括以下步骤。
在步骤S131，第一网元CU同时将相同的数据包发送到第二网元DU1和第二网元DU2。其中，第一网元与第二网元之间通过fronthaul接口连接，为了方便说明，这里定义为“NGx”接口。
在步骤S132，第二网元DU1和第二网元DU2同时将数据包发送到终端。所述数据包为完整的数据包PDU或PDU分段。
在步骤S133，终端向第二网元DU2反馈接收未成功反馈信息，向第二网元DU1反馈接收成功反馈信息。所述终端分别向第二网元DU1和第二网元DU2反馈数据包的接收状态。
在步骤S134，第二网元DU1向第一网元报告发送状态反馈信息。
在步骤S135，第一网元根据步骤S134的状态反馈信息生成第一指示信息，并发送第一指示信息到第二网元DU2。所述发送状态反馈信息包括至少以下之一：第二网元数据的发送状态、下一个新传数据包的序列号。
所述第一指示信息可以是以下之一：一个序列号、序列号列表、区间段、多个区间段列表。
所述第一指示信息用于指示第二网元删除所述第一指示信息所指示的数据包，和/或，所述第一指示信息用于指示第二网元下一个新传的数据包序列号。
步骤S136：第二网元DU2根据第一指示信息的指示生成空数据包。所述第二网元DU2将空包指示信息添加到PDU头信息里，所述空数据包的PDU帧结构如图9所示。
可选的，所述第二网元DU2将PDU头中的长度指示信息设置为“0”，表示该数据包为空包，PDU帧结构如图10所示。
可选的，第二网元DU2根据第一指示信息的指示，丢弃所述第一指示信息中所指示的数据包。
步骤S137：第二网元DU2发送空包到终端。
可选地，终端接收到空包后，将与空包序列号对应的缓存在本地的数据PDU或PDU分段删除。
图14是根据本公开实施例的通过控制信令配置告诉终端数据包为空包示意图。图14与图13不同之处在于通过控制信令将空包的信息告诉终端，可包括以下步骤。
在步骤S141，第一网元CU同时将相同的数据包发送到第二网元DU1和第二网元DU2。其中第一网元与第二网元之间通过fronthaul接口连接，为了方便说明，这里定义为“NGx”接口。
在步骤S142，第二网元DU1和第二网元DU2同时将数据包发送到终端。所述数据包为完整的数据包PDU或PDU分段。
在步骤S143，终端向第二网元DU2反馈接收未成功反馈信息，向第二网元DU1反馈接收成功反馈信息。所述终端分别向第二网元DU1和第二网元DU2反馈数据包的接收状态。
在步骤S144，第二网元DU1向第一网元报告发送状态反馈信息。
在步骤S145，第一网元根据步骤S144的状态反馈信息生成第一指示信息，并发送第一指示信息到第二网元DU2。所述发送状态反馈信息包括至少以下之一：第二网元数据的发送状态、下一个新传数据包的序列号。所述第一指示信息可以是以下之一：一个序列号、序列号列表、区间段、多个区间段列表。
所述第一指示信息用于指示第二网元删除所述第一指示信息所指示的数据包，和/或，所述第一指示信息用于指示第二网元下一个新传的数据包序列号。
在步骤S146，第二网元DU2根据第一指示信息的指示生成空数据包。
所述第二网元DU2将空包指示信息添加到PDU头信息里，所述空数据包的PDU帧结构如图9所示。
可选的，第二网元DU2根据第一指示信息的指示，丢弃所述第一指示信息中所指示的数据包。
在步骤S147，网元配置终端进行空包的接收。配置信息包括至少以下之一：L3控制信令、L2控制信令、L1控制信令。其中，L3控制信令可以是无线资源控制(Radio Resource Control，简称为RRC)控制信令；L2控制信令可以是MAC CE；L1控制信令可以是物理层控制信令(比如物理下行控制信道(Physical Downlink Control Channel，简称为PDCCH)或ePDCCH)。
在步骤S148，第二网元DU2发送空包到终端。
可选地，终端接收到空包后，将与空包序列号对应的缓存在本地的数据PDU或PDU分段删除。
图15是根据本公开实施例的下行数据发送处理流程示意图。如图15所示，第一网元为CU，第二网元为DU，CU和DU之间的接口称为NGx接口，NGx-C为前向接口控制面，NGx-U为前向接口用户面。该实施例应设置为在下行数据发送过程中，CU将UE的下行数据发送给多个CU的场景，在其中一个DU成功接收到CU的数据后，指示CU丢弃或删除未成功发往其他第二网元(如DU2)但已成功发送到第二网元(如DU1)的数据包，从而提高数据传输效率。该流程可包括以下步骤。
在步骤S151，CU给DU发送“数据发送消息”，将通过NGx-U发送的数据包序列号 信息告诉DU，DU保存该信息，可以设置为前向接口上数据包丢失检测。
在步骤S152，DU通过NGx-U接收到CU发送的数据包后，DU立即通过第一指示信息通知CU当前数据包已经通过前向接口接收成功。
在步骤S153，CU得到通知消息后，如果该数据包还没有在其他分支发送，则丢弃这个包或者替换为空包。CU依靠步骤S151中的数据包序列号来确认哪个包已经被DU接收成功。
图16是根据本公开实施例的上行数据发送处理流程示意图。如图16所示，第一网元为CU，第二网元为DU，CU和DU之间的接口称为NGx接口，NGx-C为前向接口控制面，NGx-U为前向接口用户面。该实施例应用于在上行数据发送过程中，即多个DU将UE上行数据发给CU的场景，在其中一个DU成功将数据发送给CU后，CU指示其他第二网元(如DU2)丢弃或删CU已成功接收的数据包，从而提高数据传输效率。该流程可包括以下步骤。
在步骤S161，DU将上行数据通过NGx-U将UE上行数据发送给CU；
在步骤S162，CU接收到某一个DU发送的上行数据包后，CU通知其他为UE提供数据传输服务的DU，当前数据包已经通过前向接口接收成功。可选地，也可以通知该DU上行数据已接收成功。
在步骤S163，其他DU收到该通知后，丢弃这个包或者替换为空包。DU依靠步骤S161中的数据包序列号来确认具体哪个包已经接收成功。
在一实施例中，这里的数据包序列号可以是PDCP SN号或者RLC SN号或者新定义用户面接口序列号，其中，序列号Sequence Number，简称为SN。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献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(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本公开各个实施例所述的方法。
实施例2
在本实施例中还提供了一种数据包传输装置，该装置设置为实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图17是根据本公开实施例的数据包传输装置的结构框图一，如图17所示，该装置包括：
第一发送模块172，设置为向终端发送数据包；
第一接收模块174，连接至上述第一发送模块172，设置为接收终端反馈的数据包的传输状态；
触发模块176，连接至上述第一接收模块174，设置为向第一网元反馈传输状态并触发第一网元根据传输状态生成第一指示信息，其中，第一指示信息用于指示向终端发送数据包还未成功的第二网元丢弃第一指示信息指示的数据包。
可选地，第一指示信息用于指示向终端发送数据包还未成功的第二网元丢弃第一指示信息指示的数据包包括以下至少之一：第一指示信息用于指示向终端发送数据包还未成功的第二网元删除第一指示信息指示的数据包，第一指示信息用于指示向终端发送数据包还未成功的第二网元向终端发送空数据包。
可选地，触发模块176，还设置为在第一指示信息用于指示向终端发送数据包还未成功的第二网元向终端发送空数据包且第二网元向终端发送数据包还未成功的情况下，在向第一网元反馈传输状态并触发第一网元根据传输状态生成第一指示信息之后，在数据包中增加空包指示信息，其中，空包指示信息用于指示发送给终端的数据包是空数据包；以及将数据包发送给终端，以便终端删除缓存中与空数据包对应的分组数据单元PDU或PDU分段。
可选地，第一指示信息还用于指示至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，第一指示信息包括以下至少之一：一个数据包的序列号、数据包序列号列表、数据包对应的序列号的区间段、多个区间段列表。
图18是根据本公开实施例的数据包传输装置的结构框图二，如图18所示，该装置包括：第二接收模块182，设置为接收第一网元发送的数据包；生成模块184，连接至第二接收模块182，设置为根据数据包的接收状态生成第二指示信息；第二发送模块186，连接至上述生成模块184，设置为将第二指示信息发送给第一网元，其中，第二指示信息用于指示数据包的接收状态。
可选地，第二指示信息还用于指示第二网元下一个或多个需要传输的数据包的序列号。
可选地，第二指示信息在第二网元与第一网元之间的接口上传输。
图19是根据本公开实施例的数据包传输装置的结构框图三，如图19所示，该装置包括：第三发送模块192，设置为向至少两个第二网元发送相同的数据包；第三接收模块194，连接至上述第三发送模块192，设置为接收至少两个第二网元中成功接收数据包的第二网元反馈的第三指示信息，其中，第三指示信息用于指示删除还未向其他第二网元成功发送的数据包；删除模块196，连接至上述第三接收模块194，设置为根据第三指示信息删除还未向至少两个第二网元中其他第二网元成功发送的相同的数据包。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
实施例3
本公开的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：S1，第二网元向终端发送数据包；S2，第二网元接收终端反馈的数据包的传输状态；S3，第二网元向第一网元反馈传输状态并触发第一网元根据传输状态生成第一指示信息，其中，第一指示信息用于指示向终端发送数据包还未成功的第二网元丢弃第一指示信息指示的数据包。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：S1，第一指示信息用 于指示向终端发送数据包还未成功的第二网元丢弃第一指示信息指示的数据包包括以下至少之一：第一指示信息用于指示向终端发送数据包还未成功的第二网元删除第一指示信息指示的数据包，第一指示信息用于指示向终端发送数据包还未成功的第二网元向终端发送空数据包。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：在第一指示信息用于指示向终端发送数据包还未成功的第二网元向终端发送空数据包且第二网元向终端发送数据包还未成功的情况下，在向第一网元反馈传输状态并触发第一网元根据传输状态生成第一指示信息之后，还包括：S1，第二网元在数据包中增加空包指示信息，其中，空包指示信息用于指示发送给终端的数据包是空数据包；S2，第二网元将数据包发送给终端，以便终端删除缓存中与空数据包对应的分组数据单元PDU或PDU分段。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：S1，第一指示信息还用于指示至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：S1，第一指示信息包括以下至少之一：一个数据包的序列号、数据包序列号列表、数据包对应的序列号的区间段、多个区间段列表。
本公开的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：S1，第二网元接收第一网元发送的数据包；S2，第二网元根据数据包的接收状态生成第二指示信息；S3，第二网元将第二指示信息发送给第一网元，其中，第二指示信息用于指示数据包的接收状态。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：S1，第二指示信息还用于指示第二网元下一个或多个需要传输的数据包的序列号。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：S1，第二指示信息在第二网元与第一网元之间的接口上传输。
本公开的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：S1，第一网元向至少两个第二网元发送相同的数据包；S2，第一网元接收至少两个第二网元中成功接收数据包的第二网元反馈的第三指示信息，其中，第三指示信息用于指示第一网元删除还未向其他第二网元成功发送的数据包；S3，第一网元根据第三指示信息删除还未向至少两个第二网元中其他第二网元成功发送的相同的数据包。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：S1，第三指示信息还用于指示至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：S1，第三指示信息在至少两个第二网元与第一网元之间的接口上传输。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：第二网元向终端发送数据包；所述第二网元接收所述终端反馈的所述数据包的传输状态；所述第二网元向第一网元反馈所述传输状态并触发所述第一网元根据所述传输状态生成第一指示信息，其中，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包包括以下至少之一：所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元删除所述第一指示信息指示的数据包，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元向所述终端发送空数据包。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：在所述第一指示信息用于指示向终端发送数据包还未成功的第二网元向所述终端发送空数据包且所述第二网元向所述终端发送数据包还未成功的情况下，在向所述第一网元反馈所述传输状态并触发所述第一网元根据所述传输状态生成第一指示信息之后，还包括：所述第二网元在所述数据包中增加空包指示信息，其中，所述空包指示信息用于指示发送给所述终端的数据包是空数据包；所述第二网元将所述数据包发送给所述终端，以便所述终端删除缓存中与所述空数据包对应的分组数据单元PDU或PDU分段。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：所述第一指示信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：所述第一指示信息包括以下至少之一：一个数据包的序列号、数据包序列号列表、数据包对应的序列号的区间段、多个区间段列表。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：第二网元接收第一网元发送的数据包；第二网元根据所述数据包的接收状态生成第二指示信息；第二网元将所述第二指示信息发送给第一网元，其中，所述第二指示信息用于指示所述数据包的接收状态。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：所述第二指示信息还用于指示所述第二网元下一个或多个需要传输的数据包的序列号。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：所述第二指示信息在所述第二网元与所述第一网元之间的接口上传输。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：第一网元向至少两个第二网元发送相同的数据包；第一网元接收所述至少两个第二网元中成功接收所述数据包的第二网元反馈的第三指示信息，其中，所述第三指示信息用于指示所述第一网元删除还未向所述其他第二网元成功发送的数据包；第一网元根据所述第三指示信息删除还未向所述至少两个第二网元中其他第二网元成功发送的相同的数据包。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：所述第三指示 信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行：所述第三指示信息在所述至少两个第二网元与所述第一网元之间的接口上传输。
可选地，本实施例中的示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本公开的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本公开不限制于任何特定的硬件和软件结合。
以上所述仅为本公开的优选实施例而已，并不用于限制本公开，对于本领域的技术人员来说，本公开可以有各种更改和变化。凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (25)

  1. 一种数据包传输方法，包括：第一网元根据第二网元向第一网元反馈的传输状态生成第一指示信息，其中，所述第一指示信息用于指示向终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包。
  2. 根据权利1所述的方法，其中，所述第一网元根据所述传输状态生成第一指示信息之前包括：
    所述第二网元向所述终端发送数据包；
    所述第二网元接收所述终端反馈的所述数据包的传输状态；
    所述第二网元向所述第一网元反馈所述传输状态。
  3. 根据权利要求1所述的方法，其中，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包包括以下至少之一：所述第一指示信息用于指示向所述第二网元删除所述第一指示信息指示的数据包，所述第一指示信息用于指示第二网元向所述终端发送空数据包。
  4. 根据权利要求3所述的方法，其中，在所述第一指示信息用于指示所述第二网元向所述终端发送空数据包且所述第二网元向所述终端发送数据包还未成功的情况下，在向所述第一网元反馈所述传输状态并触发所述第一网元根据所述传输状态生成第一指示信息之后，还包括：
    所述第二网元在所述数据包中增加空包指示信息，其中，所述空包指示信息用于指示发送给所述终端的数据包是空数据包；
    所述第二网元将所述数据包发送给所述终端，以便所述终端删除缓存中与所述空数据包对应的分组数据单元PDU或PDU分段。
  5. 根据权利要求1所述的方法，其中，所述第一指示信息还用于指示所述第二网元下一个或多个需要传输的数据包的序列号。
  6. 根据权利要求1至5中任一项所述的方法，其中，
    所述第一指示信息包括以下至少之一：一个数据包的序列号、数据包序列号列表、数据包对应的序列号的区间段、多个区间段列表。
  7. 一种数据包传输方法，包括：
    第二网元接收第一网元发送的数据包；
    第二网元根据所述数据包的接收状态生成第二指示信息；
    第二网元将所述第二指示信息发送给第一网元，其中，所述第二指示信息用于指示所述数据包的接收状态。
  8. 根据权利要求7所述的方法，其中，所述第二指示信息还用于指示所述第二网元下一个或多个需要传输的数据包的序列号。
  9. 根据权利要求7或者8所述的方法，其中，所述第二指示信息在所述第二网元与所 述第一网元之间的接口上传输。
  10. 一种数据包传输方法，包括：
    第一网元向至少两个第二网元发送相同的数据包；
    第一网元接收所述至少两个第二网元中成功接收所述数据包的第二网元反馈的第三指示信息，其中，所述第三指示信息用于指示所述第一网元删除还未向所述至少两个第二网元中其他第二网元成功发送的数据包；
    第一网元根据所述第三指示信息删除还未向所述至少两个第二网元中其他第二网元成功发送的相同的数据包。
  11. 根据权利要求10所述的方法，其中，所述第三指示信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
  12. 根据权利要求10或者11所述的方法，其中，所述第三指示信息在所述至少两个第二网元与所述第一网元之间的接口上传输。
  13. 一种数据包传输装置，包括触发模块，所述触发模块设置为触发第一网元根据第二网元向第一网元反馈的传输状态生成第一指示信息，其中，所述第一指示信息用于指示向终端发送数据包还未成功的所述第二网元丢弃所述第一指示信息指示的数据包。
  14. 根据权利要求13所述的装置，还包括：
    第一发送模块，设置为向所述终端发送数据包；
    第一接收模块，设置为接收所述终端反馈的所述数据包的传输状态；
    所述触发模块还设置为向所述第一网元反馈所述传输状态。
  15. 根据权利要求13中所述的装置，其中，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元丢弃所述第一指示信息指示的数据包包括以下至少之一：所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元删除所述第一指示信息指示的数据包，所述第一指示信息用于指示向所述终端发送数据包还未成功的第二网元向所述终端发送空数据包。
  16. 根据权利要求15所述的装置，其中，所述触发模块，还设置为在所述第一指示信息用于指示向终端发送数据包还未成功的第二网元向所述终端发送空数据包且所述第二网元向所述终端发送数据包还未成功的情况下，在向所述第一网元反馈所述传输状态并触发所述第一网元根据所述传输状态生成第一指示信息之后，在所述数据包中增加空包指示信息，其中，所述空包指示信息用于指示发送给所述终端的数据包是空数据包；以及将所述数据包发送给所述终端，以便所述终端删除缓存中与所述空数据包对应的分组数据单元PDU或PDU分段。
  17. 根据权利要求13所述的装置，其中，所述第一指示信息还用于指示所述第二网元下一个或多个需要传输的数据包的序列号。
  18. 根据权利要求13至17中任一项所述的装置，其中，所述第一指示信息包括以下至少之一：一个数据包的序列号、数据包序列号列表、数据包对应的序列号的区间段、多 个区间段列表。
  19. 一种数据包传输装置，包括：
    第二接收模块，设置为接收第一网元发送的数据包；
    生成模块，设置为根据所述数据包的接收状态生成第二指示信息；
    第二发送模块，设置为将所述第二指示信息发送给第一网元，其中，所述第二指示信息用于指示所述数据包的接收状态。
  20. 根据权利要求19所述的装置，其中，所述第二指示信息还用于指示第二网元下一个或多个需要传输的数据包的序列号。
  21. 根据权利要求19或者20所述的装置，其中，所述第二指示信息在所述第二网元与所述第一网元之间的接口上传输。
  22. 一种数据包传输装置，包括：
    第三发送模块，设置为向至少两个第二网元发送相同的数据包；
    第三接收模块，设置为接收所述至少两个第二网元中成功接收所述数据包的第二网元反馈的第三指示信息，其中，所述第三指示信息用于指示删除还未向所述至少两个第二网元中其他第二网元成功发送的数据包；
    删除模块，设置为根据所述第三指示信息删除还未向所述至少两个第二网元中其他第二网元成功发送的相同的数据包。
  23. 根据权利要求22所述的装置，其中，所述第三指示信息还用于指示所述至少两个第二网元下一个或多个需要传输的数据包的序列号。
  24. 根据权利要求22或者23所述的装置，其中，所述第三指示信息在所述至少两个第二网元与所述第一网元之间的接口上传输。
  25. 一种计算机存储介质，所述计算机存储介质存储有执行指令，所述执行指令设置为执行权利要求1至12中任一项所述的方法。
PCT/CN2017/117881 2017-01-10 2017-12-22 数据包传输方法及装置 Ceased WO2018130059A1 (zh)

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