WO2022267450A1 - 数据传输方法、pdcp发送实体、网络设备以及存储介质 - Google Patents

数据传输方法、pdcp发送实体、网络设备以及存储介质 Download PDF

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Publication number
WO2022267450A1
WO2022267450A1 PCT/CN2022/071063 CN2022071063W WO2022267450A1 WO 2022267450 A1 WO2022267450 A1 WO 2022267450A1 CN 2022071063 W CN2022071063 W CN 2022071063W WO 2022267450 A1 WO2022267450 A1 WO 2022267450A1
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value
pdcp
pdu
entity
receiving
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PCT/CN2022/071063
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English (en)
French (fr)
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崔冶华
桑健
李群
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/03—Protocol definition or specification 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols

Definitions

  • the embodiments of the present application relate to but are not limited to the communication field, and in particular, relate to a data transmission method, a PDCP sending entity, a network device, and a storage medium.
  • the standard protocol is TS 38.323, which requires a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) receiving entity to be associated with a PDCP sending entity. This requirement cannot support data sharing. Interested, the base station (set with PDCP sending entity) and the terminal will transmit the data packets of the video program through their respective transmission channels, but the downlink physical resources of the physical cell of the base station are limited. When the number of terminals exceeds the threshold, the base station cannot Ensure that each terminal can be allocated the physical resources of the video program, resulting in poor user experience.
  • PDCP Packet Data Convergence Protocol
  • the embodiment of the present application proposes a data transmission method, a PDCP sending entity, a network device, and a storage medium.
  • the embodiment of the present application provides a data transmission method, including: obtaining a first serial number (Serial Number, SN) value in the first PDU; when the first SN value is greater than the receiving window range of the PDCP receiving entity In the case of the maximum value in the information, a second SN value is obtained according to the receiving window range information and the first SN value; a second PDU carrying the second SN value is generated according to the second SN value, and The second PDU is sent to the PDCP receiving entity, so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, and the first SN value is adjusted in the received Within the scope of window range information; configure the encryption and decryption algorithm and integrity protection algorithm carried by the first PDU as an empty algorithm, and send the first PDU to the PDCP receiving entity in a broadcast manner.
  • SN Serial Number
  • the embodiment of the present application also provides a PDCP sending entity, including: a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the computer program when executing the computer program.
  • a PDCP sending entity including: a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the computer program when executing the computer program.
  • the embodiment of the present application further provides a network device, including: the PDCP sending entity in the second aspect.
  • a computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to execute the data transmission method described in the first aspect.
  • FIG. 1 is a schematic diagram of a system architecture for performing a data transmission method provided by an embodiment of the present application
  • FIG. 2 is a flowchart of a data transmission method applied to a PDCP sending entity provided by an embodiment of the present application
  • FIG. 3 is a flowchart of a data transmission method applied to a PDCP sending entity provided by another embodiment of the present application
  • Fig. 4 is a schematic diagram of a PDCP sending entity implementing a data transmission method provided by an embodiment of the present application.
  • An embodiment of the present application provides a data transmission method, a PDCP sending entity, a network device, and a storage medium.
  • the data transmission method includes but is not limited to the following steps: obtaining the first SN value in the first PDU; when the first SN value is greater than In the case of the maximum value in the receiving window range information of the PDCP receiving entity, the second SN value is generated according to the receiving window range information and the first SN value; the second PDU carrying the second SN value is generated according to the second SN value, and the first The second PDU is sent to the PDCP receiving entity, so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, so that the first SN value is in the adjusted receiving window range information; the encryption and decryption algorithm carried by the first PDU
  • the integrity protection algorithm is configured as an empty algorithm, and the first PDU is broadcast to the PDCP receiving entity.
  • a second PDCP message carrying the second SN value may be sent to the PDCP receiving entity.
  • the first PDU with the encryption and decryption algorithm and the integrity protection algorithm configured as an empty algorithm, thereby avoiding the occurrence of
  • multiple PDCP receiving entities can share the first PDU sent by the same PDCP sending entity, thereby saving the network The purpose of the downlink physical resource of the device.
  • FIG. 1 is a schematic diagram of a system architecture platform 100 for executing a data transmission method provided by an embodiment of the present application.
  • the system architecture platform 100 is provided with a network device and a terminal device, the network device may be configured with multiple antennas, and the terminal device may also be configured with multiple antennas.
  • a network device or a network device may also include multiple components related to signal transmission and reception (for example, a processor, a modulator, a multiplexer, a demodulator, or a demultiplexer, etc.).
  • the network device is a device with a wireless transceiver function or a chip that can be set on the device, and the device includes but is not limited to: an evolved Node B (evolved Node B, eNB), a radio network controller (radio network controller, RNC) , Node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband Unit (baseband unit, BBU), wireless fidelity (wireless fidelity, WIFI) system access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP), etc., can also be 5G, such as NR, gNB in the system, or transmission point (TRP or TP), one or a group (including multiple antenna panels) antenna panels of the base station in the 5G system , or
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include a radio unit (radio unit, RU).
  • CU implements some functions of gNB
  • DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer functions
  • DU implements wireless link Functions of the radio link control (radio link control, RLC), media access control (media access control, MAC) and physical (physical, PHY) layers.
  • the network device may be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into network devices in the access network RAN, and the CU can also be divided into network devices in the core network CN, which is not limited here.
  • Terminal equipment may also be called user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • the embodiments of the present application do not limit the application scenarios.
  • a terminal device with a wireless transceiver function and a chip that can be installed in the aforementioned terminal device are collectively referred to as a terminal device.
  • the scenario includes but is not limited to a live broadcast scenario or a TV program real-time broadcast scenario.
  • the system architecture platform 100 of FIG. There is a one-to-many relationship between the sending entity 110 and the PDCP receiving entity 120, and the PDCP sending entity 110 and the PDCP receiving entity 120 can transmit PDUs according to the standard protocol TS38.323, wherein the PDCP sending entity 110 can be set in the network device
  • the PDCP receiving entity 120 may be set in a terminal device, and the PDCP sending entity 110 may send a PDU to the PDCP receiving entity 120 through a downlink physical cell.
  • the encryption/decryption algorithm and integrity protection algorithm of the PDCP sending entity and the PDCP receiving entity can be configured as empty algorithms.
  • system architecture platform 110 can be applied to communication network systems and subsequent evolved mobile communication network systems, etc., which is not specifically limited in this embodiment.
  • FIG. 1 does not constitute a limitation to the embodiment of the present application, and may include more or less components than those shown in the illustration, or combine some components, or have different Part placement.
  • Figure 2 is a flowchart of a data transmission method provided by an embodiment of the present application, the data transmission method is applied to a PDCP sending entity, and the data transmission method includes but is not limited to step S100, step S200, step S300, step S400 and step S500.
  • Step S100 acquiring the first SN value in the first PDU.
  • the PDCP sending entity when it needs to send the first PDU to one or more PDCP receiving entities, it can first obtain the first SN value in the first PDU, where the first PDU means that the PDCP sending entity needs to send the PDCP receiving entity to the PDCP receiving entity.
  • the PDU refers to a type of PDU in general, and does not specifically represent a PDU.
  • Step S200 acquiring the receiving window range information of the PDCP receiving entity.
  • the PDCP sending entity may obtain the receiving window range information of the PDCP receiving entity.
  • the receiving window range information may be the receiving window range information obtained directly by the PDCP sending entity from the PDCP receiving entity, or it may be that the PDCP sending entity obtains the receiving window range information from the PDCP receiving entity. This embodiment does not specifically limit the information generated by the receiving entity from the receiving window range information.
  • the receiving window range information of the PDCP receiving entity may include the RX_DELIV value and the Window_Size value, then the receiving window range information is range information that is greater than or equal to the RX_DELIV value and less than the sum of the RX_DELIV value and the Window_Size value.
  • Step S300 if the first SN value is greater than the maximum value of the receiving window range information, generate a second SN value according to the receiving window range information and the first SN value.
  • the PDCP sending entity may compare the first SN value with the receiving window range information to detect whether the first SN value exceeds the receiving window range of the PDCP receiving entity, and if the first SN value is greater than the maximum value of the receiving window range information In this case, it can be considered that the first SN value exceeds the receiving window range of the PDCP receiving entity, and according to the standard protocol TS38.323, in this case, the PDCP receiving entity needs to discard the first PDU corresponding to the first SN value, so that the PDCP receiving entity The first PDU can be successfully received.
  • the PDCP sending entity can generate a second SN value according to the receiving window range information and the first SN value. The second SN value is used to adjust the receiving window range information of the PDCP receiving entity in subsequent steps.
  • Step S400 generate a second PDU carrying the second SN value according to the second SN value, and send the second PDU to the PDCP receiving entity, so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, and the first The SN value is within the range of the adjusted receiving window range information.
  • the PDCP sending entity may generate a second PDU carrying the second SN value according to the second SN value, and send the second PDU to the PDCP receiving entity.
  • the second PDU will be transmitted to the upper layer.
  • the RX_DELIV value in the PDCP receiving entity will be changed to the second SN value, and the receiving window range information will follow It is adjusted as the value of RX_DELIV changes, so that the first SN value is within the range information of the adjusted receiving window.
  • the PDCP sending entity sends the second PDU carrying the second SN value to the PDCP receiving entity so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, so that the first SN value is within the adjusted receiving window range information. within range.
  • Step S500 configure the encryption/decryption algorithm and integrity protection algorithm carried in the first PDU as an empty algorithm, and send the first PDU to the PDCP receiving entity in a broadcast manner.
  • the PDCP sending entity may configure the encryption and decryption algorithm and the integrity protection algorithm carried in the first PDU as an empty algorithm.
  • the encryption and decryption algorithm and integrity protection algorithm carried by a PDU are configured as empty algorithms, which can avoid the situation that the PDCP receiving entity fails to decrypt or encrypt the first PDU and discards the first PDU, and the first SN value is already within the adjusted receiving window range
  • the PDCP receiving entity will not directly discard the obtained PDU, that is, multiple PDCP receiving entities can share the first PDU sent by the PDCP sending entity, thereby saving downlink physical resources of the network device.
  • the PDCP sending entity may generate the second SN according to the receiving window range information and the first SN value value, and generate a second PDCP carrying the second SN value according to the second SN value, and then send the second PDCP to the PDCP receiving entity to adjust the receiving window range information so that the first SN value falls within the adjusted receiving window, and then send to the PDCP receiving entity the first PDU whose encryption and decryption algorithm and integrity protection algorithm are configured as empty algorithms, so as to avoid the situation that the PDCP receiving entity fails to decrypt or encrypt the first PDU and discards the first PDU, and can avoid the occurrence of
  • the first SN value of the first PDU obtained by the PDCP receiving entity is discarded because it exceeds the receiving window range information
  • multiple PDCP receiving entities can share the first PDU sent by the same PDCP sending entity, thereby saving the network The purpose of the down
  • the first PDU in the scenario of real-time broadcasting of TV programs, is used to store video data of TV festivals.
  • the window range information is [0, 2 ⁇ (pdcp-SN-Size)–1].
  • PDCP_SN ⁇ 2 ⁇ (pdcp-SN-Size)–1 it can be considered that PDCP_SN is in the super window state.
  • the PDCP sending entity The second SN value can be generated according to the receiving window range information and the first SN value, and the second PDCP carrying the second SN value can be generated according to the second SN value, and then the second PDCP can be sent to the PDCP receiving entity to adjust the receiving window range Information, the adjusted receiving window range information is [second SN value, 2 ⁇ (pdcp-SN-Size)–1], which can make the first SN value fall into the adjusted receiving window range, and can avoid PDCP
  • the PDCP sending entity sends the first PDU whose encryption and decryption algorithm and integrity protection algorithm are configured as empty algorithms to the PDCP receiving entity , so as to avoid the situation that the first PDU is discarded due to the failure of the PDCP receiving entity to decrypt or fail to encrypt.
  • the above-mentioned data transmission method can enable the newly created PDCP receiving entity to obtain the first PDU, and multiple PDCP receiving entities can share the PDCP sending entity.
  • FIG. 3 is a flowchart of a data transmission method provided by an embodiment of the present application, including but not limited to step S310 , step S320 , step S330 , step S340 , step S350 and step S360 .
  • Step S310 acquiring the first SN value in the first PDU.
  • the PDCP sending entity when it needs to send the first PDU to one or more PDCP receiving entities, it can first obtain the first SN value in the first PDU, where the first PDU means that the PDCP sending entity needs to send the PDCP receiving entity to the PDCP receiving entity.
  • the PDU refers to a type of PDU in general, and does not specifically represent a PDU.
  • step S320 the receiving window range information of the PDCP receiving entity is acquired, and the receiving window range information includes RX_DELIV value and Window_Size value.
  • the receiving window range information of the PDCP receiving entity may include the RX_DELIV value and the Window_Size value, then the receiving window range information is range information that is greater than or equal to the RX_DELIV value and less than the sum of the RX_DELIV value and the Window_Size value.
  • Step S330 when the first SN value is greater than or equal to the sum of the RX_DELIV value and the Window_Size value, generate a second SN value according to the first SN value, the first RX_DELIV value and the Window_Size value.
  • the second SN value is a value in the target range, and the target range is greater than the difference between the first SN value and the Window_Size value, and less than or equal to the sum of the first RX_DELIV value and the Window_Size value.
  • Step S340 generating a second PDU carrying the second SN value according to the second SN value.
  • the PDCP sending entity may generate a second PDU carrying the second SN value according to the second SN value, and the second PDU may be used to adjust the receiving window range information of the PDCP receiving entity.
  • Step S350 send the second PDU to the PDCP receiving entity, so that the PDCP receiving entity adjusts the RX_DELIV value in the receiving window range information according to the second SN value in the second PDU, so that the RX_DELIV value is equal to the second SN value, so that Make the first SN value within the range of the adjusted receiving window range information.
  • the PDCP sending entity may send the second PDU carrying the second SN value to the PDCP receiving entity, and when the PDCP receiving entity receives the second PDU carrying the second SN value, it will transmit the second PDU to the upper layer, according to According to the standard protocol TS38.323, after the second PDU is transmitted to the upper layer, the RX_DELIV value in the PDCP receiving entity will be changed to the second SN value, then the receiving window range information will be adjusted as the RX_DELIV value changes, so that the first SN value in the adjusted receiving window range information.
  • the PDCP sending entity sends the second PDU carrying the second SN value to the PDCP receiving entity so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, so that the first SN value is within the adjusted receiving window range information. within range.
  • the second PDU may be sent to the PDCP receiving entity multiple times to prevent the situation that the PDCP receiving entity does not obtain the second PDU due to packet loss, and this embodiment does not specifically limit the number of times of sending.
  • the encryption and decryption algorithm and the integrity protection algorithm carried by the second PDU can be configured as empty algorithms and then the configured second PDU can be sent to the PDCP receiving entity, or the configuration can be sent to a certain PDCP receiving entity. After the second PDU, this embodiment does not specifically limit it.
  • Step S360 configure the encryption/decryption algorithm and integrity protection algorithm carried in the first PDU as an empty algorithm, and send the first PDU to the PDCP receiving entity in a broadcast manner.
  • the PDCP sending entity may configure the encryption and decryption algorithm and the integrity protection algorithm carried in the first PDU as an empty algorithm.
  • the encryption and decryption algorithm and integrity protection algorithm carried by a PDU are configured as empty algorithms, which can avoid the situation that the PDCP receiving entity fails to decrypt or encrypt the first PDU and discards the first PDU, and the first SN value is already within the adjusted receiving window range
  • the PDCP receiving entity will not directly discard the obtained PDU, that is, multiple PDCP receiving entities can share the first PDU sent by the PDCP sending entity, thereby saving downlink physical resources of the network device.
  • the first PDU in a live broadcast scenario, is used to store video data for TV festivals.
  • the newly created PDCP receiving entity can obtain the first PDU, and multiple PDCP receiving entities can share PDCP transmission.
  • the same first PDU sent by the entity so as to achieve the purpose of saving downlink physical resources of the network device.
  • the PDCP sending entity 400 includes a memory 420 , a processor 410 and a computer program stored in the memory 420 and operable on the processor 410 .
  • the processor 410 and the memory 420 may be connected through a bus or in other ways.
  • the memory 420 can be used to store non-transitory software programs and non-transitory computer-executable programs.
  • the memory 420 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices.
  • memory 420 may include memory located remotely from the processor, which may be connected to the processor through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
  • the non-transitory software programs and instructions required to realize the data transmission method of the above-mentioned embodiment are stored in the memory 420, and when executed by the processor 410, the data transmission method in the above-mentioned embodiment is executed, for example, executing the above-described Figure 2
  • An embodiment of the present application also provides a network device, the network device includes the PDCP sending entity in FIG. 4, and the PDCP sending entity can perform the above-described method steps S100 to S500 in FIG. 2 and the method steps in FIG. 3 S310 to S360, and achieve the technical effect in the above embodiment, which will not be described in detail in this embodiment.
  • an embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by a processor or a controller, for example, by the above-mentioned Execution by a processor in the communication device in the embodiment can cause the processor to execute the data transmission method corresponding to the network manager in the above embodiment, for example, execute the method steps S100 to S500 in FIG. 2 described above, and the method in FIG. 3 Method steps S310 to S360.
  • the embodiment of the present application includes: obtaining the first SN value in the first PDU; when the first SN value is greater than the maximum value in the receiving window range information of the PDCP receiving entity, generating the first SN value according to the receiving window range information and the first SN value Two SN values; generate a second PDU carrying the second SN value according to the second SN value, and send the second PDU to the PDCP receiving entity, so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, and the second PDU is sent to the PDCP receiving entity.
  • An SN value in the adjusted receiving window range information; the encryption and decryption algorithm and the integrity protection algorithm carried by the first PDU are configured as empty algorithms, and the first PDU is broadcast to the PDCP receiving entity.
  • a second PDCP message carrying the second SN value may be sent to the PDCP receiving entity.
  • the PDCP receiving entity To adjust the receiving window range information so that the first SN value falls into the adjusted receiving window, and then send to the PDCP receiving entity the first PDU with the encryption and decryption algorithm and the integrity protection algorithm configured as an empty algorithm, thereby avoiding the occurrence of
  • the first SN value of the first PDU obtained by the PDCP receiving entity is discarded because it exceeds the receiving window range information
  • multiple PDCP receiving entities can share the first PDU sent by the same PDCP sending entity, thereby saving the network The purpose of the downlink physical resource of the device.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer.
  • communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

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Abstract

一种数据传输方法、PDCP发送实体、网络设备以及存储介质，该数据传输方法包括：获取第一PDU中的第一SN值；在第一SN值大于PDCP接收实体的接收窗口范围信息中最大值的情况下，根据接收窗口范围信息以及第一SN值生成携带第二SN值的第二PDU；将第二PDU发送至PDCP接收实体，以使PDCP接收实体根据第二PDU将接收窗口范围信息进行调整，并且第一SN值在调整后的接收窗口范围信息；将第一PDU所携带的加解密算法与完整性保护算法配置为空算法，并将第一PDU以广播方式向PDCP接收实体进行发送。

Description

数据传输方法、PDCP发送实体、网络设备以及存储介质
相关申请的交叉引用
本申请基于申请号为202110694310.8、申请日为2021年6月22日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请实施例涉及但不限于通信领域，尤其涉及一种数据传输方法、PDCP发送实体、网络设备以及存储介质。
背景技术
标准协议为TS 38.323要求一个分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)接收实体关联一个PDCP发送实体，该要求无法支持数据共享，当多个终端(设置有PDCP接收实体)对同一个视频节目感兴趣，基站(设置有PDCP发送实体)与终端会通过各自条传输通道分别传输该视频节目的数据包，但是基站的物理小区下行物理资源是有限的，当终端的数量超过阈值以后，基站无法保证每个终端均能分配到该视频节目的物理资源，导致用户体验不好。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请实施例提出一种数据传输方法、PDCP发送实体、网络设备以及存储介质。
一方面，本申请实施例提供了一种数据传输方法，包括：获取第一PDU中的第一序列号(Serial Number，SN)值；在所述第一SN值大于PDCP接收实体的接收窗口范围信息中最大值的情况下，根据所述接收窗口范围信息以及所述第一SN值得到第二SN值；根据所述第二SN值生成携带所述第二SN值的第二PDU，并将所述第二PDU发送至所述PDCP接收实体，以使所述PDCP接收实体根据所述第二PDU将所述接收窗口范围信息进行调整，并且所述第一SN值在调整后的所述接收窗口范围信息的范围内；将所述第一PDU所携带的加解密算法与完整性保护算法配置为空算法，并将所述第一PDU以广播方式向所述PDCP接收实体进行发送。
第二方面，本申请实施例还提供了一种PDCP发送实体，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述 计算机程序时实现如第一方面所述的数据传输方法。
第三方面，本申请实施例还提供了一种网络设备，包括：第二方面的PDCP发送实体。
第四方面，一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行第一方面所述的数据传输方法。
本申请的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本申请而了解。本申请的目的和其他优点可通过在说明书以及附图中所特别指出的结构来实现和获得。
附图说明
图1是本申请一个实施例提供的用于执行数据传输方法的系统架构的示意图；
图2是本申请一个实施例提供的应用于PDCP发送实体的数据传输方法的流程图；
图3是本申请另一个实施例提供的应用于PDCP发送实体的数据传输方法的流程图；
图4是本申请一个实施例提供的执行数据传输方法的PDCP发送实体的示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
需要说明的是，虽然在装置示意图中进行了功能模块划分，在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于装置中的模块划分，或流程图中的顺序执行所示出或描述的步骤。说明书、权利要求书或上述附图中的术语“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。
本申请实施例提供了一种数据传输方法、PDCP发送实体、网络设备以及存储介质，该数据传输方法包括但不限于如下步骤：获取第一PDU中的第一SN值；在第一SN值大于PDCP接收实体的接收窗口范围信息中最大值的情况下，根据接收窗口范围信息以及第一SN值生成第二SN值；根据第二SN值生成携带第二SN值的第二PDU，并将第二PDU发送至PDCP接收实体，以使PDCP接收实体根据第二PDU将接收窗口范围信息进行调整，以使第一SN值在调整后的接收窗口范围信息；将第一PDU所携带的加解密算法与完整性保护算法配置为空算法，并将第一PDU以广播方式向PDCP接收实体进行发送。在本技术方案的实施例中，在需要发送的第一PDU中的第一SN值超出PDCP接收实体的接收窗口范围信息的情况 下，可以向PDCP接收实体发送携带第二SN值的第二PDCP以调整接收窗口范围信息，以使第一SN值落入到调整后的接收窗口中，然后向PDCP接收实体发送加解密算法与完整性保护算法配置为空算法的第一PDU，从而能够避免出现PDCP接收实体所获取的第一PDU的第一SN值由于超出接收窗口范围信息而导致丢弃的情况，能够实现多个PDCP接收实体共享同一个PDCP发送实体的发送的第一PDU，从而达到节省网络设备的下行物理资源的目的。
下面结合附图，对本申请实施例作进一步阐述。
如图1所示，图1是本申请一个实施例提供的用于执行数据传输方法的系统架构平台100的示意图。
在图1的示例中，该系统架构平台100设置有网络设备和终端设备，网络设备可配置有多个天线，终端设备也可配置有多个天线。
应理解，网络设备或网络设备还可包括与信号发送和接收相关的多个部件(例如，处理器、调制器、复用器、解调器或解复用器等)。
其中，网络设备为具有无线收发功能的设备或可设置于该设备的芯片，该设备包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission and reception point，TRP或者transmission point，TP)等，还可以为5G，如，NR，系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(DU，distributed unit)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括射频单元(radio unit，RU)。CU实现gNB的部分功能，DU实现gNB的部分功能，比如，CU实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能，DU实现无线链路控制(radio link control，RLC)、媒体接入控制(media access control，MAC)和物理(physical，PHY)层的功能。由于RRC层的信息最终会转变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令或PDCP层信令，也可以认为是由DU发送的，或者，由DU+CU发送的。可以理解的是，网络设备可以为CU节点、或DU节点、或包括CU节点和DU节点的设备。此外，CU可以划分为接入网RAN中的网络设备，也可以将CU划分为核心网CN中的网络设备，在此不做限制。
终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无 线通信设备、用户代理或用户装置。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对应用场景不做限定。本申请中将具有无线收发功能的终端设备及可设置于前述终端设备的芯片统称为终端设备。
在传输实时数据的场景下，该场景包括但不限于直播场景或者电视节目实时播放场景，例如图1的系统架构平台100中，系统架构平台100可以包括PDCP发送实体110和PDCP接收实体120，PDCP发送实体110与PDCP接收实体120存在一对多的关联关系，PDCP发送实体110与PDCP接收实体120之间可以通过执行标准协议TS38.323规定传输PDU，其中，PDCP发送实体110可以设置在网络设备中，PDCP接收实体120可以设置在终端设备中，PDCP发送实体110可以通过下行物理小区向PDCP接收实体120发送PDU。可以将PDCP发送实体与PDCP接收实体的加解密算法与完整性保护算法需要配置为空算法。
本领域技术人员可以理解的是，该系统架构平台110可以应用于通信网络系统以及后续演进的移动通信网络系统等，本实施例对此并不作具体限定。
本领域技术人员可以理解的是，图1中示出的系统架构平台并不构成对本申请实施例的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
基于上述系统架构平台，下面提出本申请的数据传输方法的各个实施例。
如图2所示，图2是本申请一个实施例提供的数据传输方法的流程图，该数据传输方法应用于PDCP发送实体，并且该数据传输方法包括但不限于有步骤S100、步骤S200、步骤S300、步骤S400和步骤S500。
步骤S100，获取第一PDU中的第一SN值。
具体地，当PDCP发送实体需要向一个或者多个PDCP接收实体发送第一PDU时，可以先获取第一PDU中的第一SN值，其中第一PDU是指PDCP发送实体需要向PDCP接收实体发送的PDU，是泛指一类PDU，非特定表示一个PDU。
可以理解的是，第一SN值为标准协议TS38.323中的PDCP_SN,PDCP_SN＝TX_NEXT modulo2^(pdcp-SN-Size)。
步骤S200，获取PDCP接收实体的接收窗口范围信息。
具体地，PDCP发送实体可以获取PDCP接收实体的接收窗口范围信息，应理解，接收窗口范围信息可以是PDCP发送实体直接从PDCP接收实体所获取接收窗口范围信息，也可以是PDCP发送实体根据从PDCP接收实体所获取接收窗口范围信息所生成的信息，本实施例对其不作具体限定。
可以理解的是，PDCP接收实体的接收窗口范围信息可以包括RX_DELIV值以及Window_Size值，那么接收窗口范围信息为大于等于RX_DELIV值、并且小于RX_DELIV值以及Window_Size值的和的范围信息。
需要说明的是，当gNB检测到UE接入并新建该接收PDCP实体时，该接收PDCP实体的RX_DELIV值可以从0开始计算，则接收窗口范围信息为[0，Window_Size-1]，例如：RX_DELIV值＝0，Window_Size＝8，那么接收窗口范围信息＝[0,7]。又例如：在其他场景下，接收PDCP实体的RX_DELIV值＝5，Window_Size＝8，那么接收窗口范围信息＝[5,12]。
步骤S300，在第一SN值大于接收窗口范围信息的最大值的情况下，根据接收窗口范围信息以及第一SN值生成第二SN值。
具体地，PDCP发送实体可以将第一SN值与接收窗口范围信息进行比较，检测第一SN值是否超出PDCP接收实体的接收窗口范围，在第一SN值大于接收窗口范围信息的最大值的情况下，可以认为第一SN值超出PDCP接收实体的接收窗口范围，而且根据标准协议TS38.323的规定，在这情况下PDCP接收实体需要丢弃第一SN值对应的第一PDU，为了PDCP接收实体能够成功接收第一PDU，此时PDCP发送实体可以根据接收窗口范围信息以及第一SN值生成第二SN值，该第二SN值用于后续步骤中调整PDCP接收实体的接收窗口范围信息。
步骤S400，根据第二SN值生成携带第二SN值的第二PDU，并将第二PDU发送至PDCP接收实体，以使PDCP接收实体根据第二PDU将接收窗口范围信息进行调整，并且第一SN值在调整后的接收窗口范围信息的范围内。
具体地，PDCP发送实体可以根据第二SN值生成携带第二SN值的第二PDU，并将第二PDU发送至PDCP接收实体，当PDCP接收实体接收到携带第二SN值的第二PDU时会将该第二PDU传输至上层，根据标准协议TS38.323的规定，第二PDU传输至上层后，PDCP接收实体中的RX_DELIV值会更变为第二SN值，那么接收窗口范围信息会随着RX_DELIV值变化而调整，以使第一SN值在调整后的接收窗口范围信息。即PDCP发送实体向PDCP接收实体发送携带第二SN值的第二PDU以使PDCP接收实体根据第二PDU将接收窗口范围信息进行调整，以使第一SN值在调整后的接收窗口范围信息的范围内。
步骤S500，将第一PDU所携带的加解密算法与完整性保护算法配置为空算法，并将第一PDU以广播方式向PDCP接收实体进行发送。
具体地，由于第一SN值已经在调整后的接收窗口范围信息的范围内，那么PDCP发送实体可以将第一PDU所携带的加解密算法与完整性保护算法配置为空算法，此时由于第一PDU所携带的加解密算法与完整性保护算法配置为空算法，能够避免出现PDCP接收实体解密失败或加密失败导致丢弃第一PDU的情况，并且第一SN值已经在调整后的接收窗口范围信息的范围内，PDCP接收实体不会对所获取的PDU进行直接丢弃，即能够实现多个PDCP接收实体共享PDCP发送实体的发送的第一PDU，从而能够节省网络设备的下行物理资源。
在一实施例中，在需要发送的第一PDU中的第一SN值超出PDCP接收实体的接收窗口范围信息的情况下，PDCP发送实体可以根据接收窗口范围信息以及第一SN值生成第二SN值，并根据第二SN值生成携带第二SN值的第二PDCP，然后可以向PDCP接收实体发送该第二PDCP以调整接收窗口范围信息，以使第一SN值落入到调整后的接收窗口中，然后向PDCP接收实体发送加解密算法与完整性保护算法配置为空算法的第一PDU，从而能够避免出现PDCP接收实体解密失败或加密失败导致丢弃第一PDU的情况，以及能够避免出现PDCP接收实体所获取的第一PDU的第一SN值由于超出接收窗口范围信息而导致丢弃的情况，能够实现多个PDCP接收实体共享同一个PDCP发送实体的发送的第一PDU，从而达到节省网络设备的下行物理资源的目的。
在一实施例中，在电视节目实时播放场景中，该第一PDU用于存储电视节日的视频数据，为了节省网络设备的下行物理资源，此时需要将该携带视频数据的同一个PDU共享至多个PDCP接收实体，即需要确保多个PDCP接收实体能够获取到同一个PDU，当有新的PDCP接收实体与PDCP发送实体建立连接，此时，该PDCP发送实体会计算第一PDU的第一SN值(第一SN值为标准协议TS38.323中的PDCP_SN，PDCP_SN＝TX_NEXT modulo 2^(pdcp-SN-Size))，而新的PDCP接收实体的RX_DELIV值＝0，即第一SN值则接收窗口范围信息为[0，2^(pdcp-SN-Size)–1]，当PDCP_SN≥2^(pdcp-SN-Size)–1，那么可以认为PDCP_SN处于超窗状态，此时，PDCP发送实体可以根据接收窗口范围信息以及第一SN值生成第二SN值，并根据第二SN值生成携带第二SN值的第二PDCP，然后可以向PDCP接收实体发送该第二PDCP以调整接收窗口范围信息，调整后的接收窗口范围信息为[第二SN值，2^(pdcp-SN-Size)–1]，能够使第一SN值落入到调整后的接收窗口范围中，能够避免出现PDCP接收实体所获取的第一PDU的第一SN值由于超出接收窗口范围信息而导致丢弃的情况，然后PDCP发送实体向PDCP接收实体发送加解密算法与完整性保护算法配置为空算法的第一PDU，从而能够避免出现PDCP接收实体解密失败或加密失败导致丢弃第一PDU的情况，通过上述的数据传输方法能够使新建的PDCP接收实体获取第一PDU，能够实现多个PDCP接收实体共享PDCP发送实体的发送的同一个第一PDU，从而达到节省网络设备的下行物理资源的目的。
如图3所示，图3是本申请一个实施例提供的数据传输方法的流程图，包括但不限于步骤S310、步骤S320、步骤S330、步骤S340、步骤S350以及步骤S360。
步骤S310，获取第一PDU中的第一SN值。
具体地，当PDCP发送实体需要向一个或者多个PDCP接收实体发送第一PDU时，可以先获取第一PDU中的第一SN值，其中第一PDU是指PDCP发送实体需要向PDCP接收实体发送的PDU，是泛指一类PDU，非特定表示一个PDU。
可以理解的是，第一SN值为标准协议TS38.323中的PDCP_SN,PDCP_SN＝TX_NEXT modulo 2^(pdcp-SN-Size)。
步骤S320，获取PDCP接收实体的接收窗口范围信息，接收窗口范围信息包括RX_DELIV值以及Window_Size值。
可以理解的是，PDCP接收实体的接收窗口范围信息可以包括RX_DELIV值以及Window_Size值，那么接收窗口范围信息为大于等于RX_DELIV值、并且小于RX_DELIV值以及Window_Size值的和的范围信息。
需要说明的是，当gNB检测到UE接入并新建该接收PDCP实体时，该接收PDCP实体的RX_DELIV值可以从0开始计算，则接收窗口范围信息为[0，Window_Size-1]，例如：RX_DELIV值＝0，Window_Size＝8，那么接收窗口范围信息＝[0,7]。又例如：在其他场景下，接收PDCP实体的RX_DELIV值＝5，Window_Size＝8，那么接收窗口范围信息＝[5,12]。
步骤S330，在第一SN值大于或者等于RX_DELIV值以及Window_Size值的和的情况下，根据第一SN值、第一RX_DELIV值以及Window_Size值生成第二SN值。
具体地，第二SN值为目标范围中的一个值，目标范围为大于第一SN值与Window_Size值的差值，且少于等于第一RX_DELIV值以及Window_Size值的和。
步骤S340，根据第二SN值生成携带第二SN值的第二PDU。
具体地，PDCP发送实体可以根据第二SN值生成携带第二SN值的第二PDU，该第二PDU可以用于调整PDCP接收实体的接收窗口范围信息。
步骤S350,将第二PDU发送至PDCP接收实体,使PDCP接收实体根据第二PDU中的第二SN值对接收窗口范围信息中的RX_DELIV值进行调整，以使RX_DELIV值等于第二SN值，以使第一SN值在调整后的接收窗口范围信息的范围内。
具体地，PDCP发送实体可以将携带第二SN值的第二PDU发送至PDCP接收实体，当PDCP接收实体接收到携带第二SN值的第二PDU时会将该第二PDU传输至上层，根据标准协议TS38.323的规定，第二PDU传输至上层后，PDCP接收实体中的RX_DELIV值会更变为第二SN值，那么接收窗口范围信息会随着RX_DELIV值变化而调整，以使第一SN值在调整后的接收窗口范围信息。即PDCP发送实体向PDCP接收实体发送携带第二SN值的第二PDU以使PDCP接收实体根据第二PDU将接收窗口范围信息进行调整，以使第一SN值在调整后的接收窗口范围信息的范围内。
需要说明的是，可以向PDCP接收实体多次发送第二PDU，以防止出现由于丢包问题导致PDCP接收实体没有获取到第二PDU的情况，其中本实施例不对发送次数做具体限定。
需要说明的是，可以将第二PDU所携带的加解密算法与完整性保护算法配置为空算法后再将配置后的第二PDU发送至PDCP接收实体，也可以针对某一个PDCP接收实体发送配置后的第二PDU，本实施例对其不作具体限定。
步骤S360，将第一PDU所携带的加解密算法与完整性保护算法配置为空算法，并将第一PDU以广播方式向PDCP接收实体进行发送。
具体地，由于第一SN值已经在调整后的接收窗口范围信息的范围内，那么PDCP发送实体可以将第一PDU所携带的加解密算法与完整性保护算法配置为空算法，此时由于第一PDU所携带的加解密算法与完整性保护算法配置为空算法，能够避免出现PDCP接收实体解密失败或加密失败导致丢弃第一PDU的情况，并且第一SN值已经在调整后的接收窗口范围信息的范围内，PDCP接收实体不会对所获取的PDU进行直接丢弃，即能够实现多个PDCP接收实体共享PDCP发送实体的发送的第一PDU，从而能够节省网络设备的下行物理资源。
在一实施例中，在直播场景中，该第一PDU用于存储电视节日的视频数据，为了节省网络设备的下行物理资源，此时需要将该携带视频数据的同一个PDU共享至多个PDCP接收实体，即需要确保多个PDCP接收实体能够获取到同一个PDU，当有新的PDCP接收实体与PDCP发送实体建立连接，此时，该PDCP发送实体会计算第一PDU的第一SN值(第一SN值为标准协议TS38.323中的PDCP_SN，PDCP_SN＝TX_NEXT modulo 2^(pdcp-SN-Size))，而新的PDCP接收实体的RX_DELIV值＝0，即第一SN值则接收窗口范围信息为[0，2^(pdcp-SN-Size)–1]，当PDCP_SN≥2^(pdcp-SN-Size)]，那么可以认为PDCP_SN处于超窗状态，此时，PDCP发送实体可以根据第一SN值、第一RX_DELIV值以及Window_Size值生成第二SN值，其中第二SN值为目标范围中的一个值，目标范围为大于第一SN值与Window_Size值的差值，且少于等于第一RX_DELIV值以及Window_Size值的和，然后根据第二SN值生成携带第二SN值的第二PDCP，然后可以向PDCP接收实体发送该第二PDCP以调整接收窗口范围信息(使RX_DELIV值等于第二SN值)，调整后的接收窗口范围信息为[第二SN值，2^(pdcp-SN-Size)–1]，能够使第一SN值落入到调整后的接收窗口范围中，能够避免出现PDCP接收实体所获取的第一PDU的第一SN值由于超出接收窗口范围信息而导致丢弃的情况，然后PDCP发送实体向PDCP接收实体发送加解密算法与完整性保护算法配置为空算法的第一PDU，从而能够避免出现PDCP接收实体解密失败或加密失败导致丢弃第一PDU的情况，通过上述的数据传输方法能够使新建的PDCP接收实体获取第一PDU，能够实现多个PDCP接收实体共享PDCP发送实体的发送的同一个第一PDU，从而达到节省网络设备的下行物理资源的目的。
基于上述数据传输方法，下面分别提出本申请的网管、网元和计算机可读存储介质的各个实施例。
本申请的一个实施例还提供了一种PDCP发送实体，如图4所示，PDCP发送实体400包括存储器420、处理器410及存储在存储器420上并可在处理器410上运行的计算机程序。
处理器410和存储器420可以通过总线或者其他方式连接。
存储器420作为一种非暂态计算机可读存储介质，可用于存储非暂态软件程序以及非暂态性计算机可执行程序。此外，存储器420可以包括高速随机存取存储器，还可以包括非暂态存储器，例如至少一个磁盘存储器件、闪存器件、或其 他非暂态固态存储器件。在一些实施方式中，存储器420可包括相对于处理器远程设置的存储器，这些远程存储器可以通过网络连接至该处理器。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。
实现上述实施例的数据传输方法所需的非暂态软件程序以及指令存储在存储器420中，当被处理器410执行时，执行上述实施例中的数据传输方法，例如，执行以上描述的图2中的方法步骤S100至S500、图3中的方法步骤S310至S360。
本申请的一个实施例还提供了一种网络设备，该网络设备包括图4的PDCP发送实体，能够通过PDCP发送实体执行以上描述的图2中的方法步骤S100至S500、图3中的方法步骤S310至S360，并达到上述实施例中的技术效果，本实施例对其不作详细赘述。
此外，本申请的一个实施例还提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机可执行指令，该计算机可执行指令被一个处理器或控制器执行，例如，被上述实施例中通信设备中的一个处理器执行，可使得处理器执行上述实施例中的对应于网管的数据传输方法，例如，执行以上描述的图2中的方法步骤S100至S500、图3中的方法步骤S310至S360。
本申请实施例包括：获取第一PDU中的第一SN值；在第一SN值大于PDCP接收实体的接收窗口范围信息中最大值的情况下，根据接收窗口范围信息以及第一SN值生成第二SN值；根据第二SN值生成携带第二SN值的第二PDU，并将第二PDU发送至PDCP接收实体，以使PDCP接收实体根据第二PDU将接收窗口范围信息进行调整，并且第一SN值在调整后的接收窗口范围信息；将第一PDU所携带的加解密算法与完整性保护算法配置为空算法，并将第一PDU以广播方式向PDCP接收实体进行发送。在本技术方案的实施例中，在需要发送的第一PDU中的第一SN值超出PDCP接收实体的接收窗口范围信息的情况下，可以向PDCP接收实体发送携带第二SN值的第二PDCP以调整接收窗口范围信息，以使第一SN值落入到调整后的接收窗口中，然后向PDCP接收实体发送加解密算法与完整性保护算法配置为空算法的第一PDU，从而能够避免出现PDCP接收实体所获取的第一PDU的第一SN值由于超出接收窗口范围信息而导致丢弃的情况，能够实现多个PDCP接收实体共享同一个PDCP发送实体的发送的第一PDU，从而达到节省网络设备的下行物理资源的目的。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统可以被实施为软件、固件、硬件及其适当的组合。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可 移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。
以上是对本申请的一些实施进行了具体说明，但本申请并不局限于上述实施方式，熟悉本领域的技术人员在不违背本申请范围的前提下还可作出种种的等同变形或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。

Claims (10)

  1. 一种数据传输方法，包括：
    获取第一PDU中的第一SN值；
    获取PDCP接收实体的接收窗口范围信息；
    在所述第一SN值大于所述接收窗口范围信息的最大值的情况下，根据所述接收窗口范围信息以及所述第一SN值生成第二SN值；
    根据所述第二SN值生成携带所述第二SN值的第二PDU，并将所述第二PDU发送至所述PDCP接收实体，以使所述PDCP接收实体根据所述第二PDU将所述接收窗口范围信息进行调整，并且所述第一SN值在调整后的所述接收窗口范围信息的范围内；
    将所述第一PDU所携带的加解密算法与完整性保护算法配置为空算法，并将所述第一PDU以广播方式向所述PDCP接收实体进行发送。
  2. 根据权利要求1所述的数据传输方法，其中，所述接收窗口范围信息包括RX_DELIV值以及Window_Size值，所述接收窗口范围信息为大于等于所述RX_DELIV值、并且小于RX_DELIV值以及Window_Size值的和的范围信息。
  3. 根据权利要求2所述的数据传输方法，其中，包括：在所述第一SN值大于PDCP接收实体的接收窗口范围信息中最大值的情况下，根据所述接收窗口范围信息以及所述第一SN值生成第二SN值包括：
    在所述第一SN值大于或者等于所述RX_DELIV值以及所述Window_Size值的和的情况下，根据所述第一SN值、所述第一RX_DELIV值以及所述Window_Size值生成第二SN值。
  4. 根据权利要求3所述的数据传输方法，其中，所述第二SN值为目标范围中的一个值，所述目标范围为大于第一SN值与所述Window_Size值的差值，且少于等于所述第一RX_DELIV值以及Window_Size值的和。
  5. 根据权利要求1至4中任意一项所述的数据传输方法，其中，所述将所述第二PDU发送至所述PDCP接收实体，以使所述PDCP接收实体根据所述第二PDU将所述接收窗口范围信息进行调整，包括：
    将所述第二PDU发送至所述PDCP接收实体，使所述PDCP接收实体根据所述第二PDU中的所述第二SN值对所述接收窗口范围信息中的所述RX_DELIV值进行调整，以使所述RX_DELIV值等于所述第二SN值。
  6. 根据权利要求1至4中任意一项所述的数据传输方法，其中，所述将所述第二PDU发送至所述PDCP接收实体包括：
    将所述第二PDU所携带的加解密算法与完整性保护算法配置为空算法，并将所述配置后的第二PDU发送至所述PDCP接收实体。
  7. 根据权利要求6所述的数据传输方法，其中，所述将所述配置后的第二PDU发送至所述PDCP接收实体包括：
    所述将配置后的第二PDU向所述PDCP接收实体进行多次发送。
  8. 一种PDCP发送实体，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现如权利要求1-7任意一项所述的数据传输方法。
  9. 一种网络设备，包括权利要求8所述的PDCP发送实体。
  10. 一种计算机可读存储介质，存储有计算机可执行指令，其中，所述计算机可执行指令用于执行权利要求1至7中任意一项所述的数据传输方法。
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