WO2020147617A1 - 数据前转的方法和设备 - Google Patents

数据前转的方法和设备 Download PDF

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Publication number
WO2020147617A1
WO2020147617A1 PCT/CN2020/070662 CN2020070662W WO2020147617A1 WO 2020147617 A1 WO2020147617 A1 WO 2020147617A1 CN 2020070662 W CN2020070662 W CN 2020070662W WO 2020147617 A1 WO2020147617 A1 WO 2020147617A1
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Prior art keywords
data
layer
sdap layer
forwarded
sdap
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PCT/CN2020/070662
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English (en)
French (fr)
Inventor
孙军帅
王莹莹
黄学艳
Original Assignee
中国移动通信有限公司研究院
中国移动通信集团有限公司
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Publication of WO2020147617A1 publication Critical patent/WO2020147617A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels

Definitions

  • the present disclosure relates to the field of wireless technology, and in particular to a method and device for data forwarding.
  • the SDAP layer is used to transmit user plane data. It is responsible for mapping the quality of service flow (Quality of Service flow, Qos flow) to the data bearer (Data RB, DRB) between the terminal and the base station, and the QoS flow carries all IP packets.
  • Qos flow Quality of Service flow
  • DRB data bearer
  • the QoS flow carries all IP packets.
  • PDCP Packet Data Convergence Protocol
  • Relying on SDAP can realize seamless switching of data packets, and can effectively solve the problem that the PDCP layer can only rely on higher-layer retransmissions after data loss during data forwarding in the normal data transmission mode UM mode, and PDCP itself is in the AM mode, the data transmission mode with high accuracy requirements, and the content of the data may change during data forwarding, which poses a very risky problem.
  • the embodiments of the present disclosure provide a method and device for data packet forwarding to solve the problem that there is no data forwarding for SDAP at present.
  • a data forwarding method provided by an embodiment of the present disclosure includes:
  • the SDAP layer receives the upper layer re-establishment request; finally, after the SDAP layer determines the data that needs to be forwarded, it sends the data that needs to be forwarded directly to the target SDAP layer.
  • the above method receives the upper layer re-establishment request through the SDAP layer, determines the data that needs to be forwarded, and sends the data that needs to be forwarded directly to the target SDAP layer, providing a SDAP data forwarding scheme, which improves 5G performance.
  • the method further includes: the SDAP layer stops sending data packets to the PDCP layer, and buffers the data sent by the upper layer
  • the SDAP layer determining the data that needs to be forwarded includes: the SDAP layer determines the data that needs to be forwarded from the buffered data according to the received forwarded data information sent by the PDCP layer.
  • the SDAP layer buffers the data sent by the upper layer, and according to the received forwarded data information sent by the PDCP layer, determines the data that needs to be forwarded from the buffered data, so that the data forwarding process If there is data that needs to be retransmitted by the upper layer, it can be retransmitted directly at the SDAP layer to better reduce the delay of data packet transmission and reduce the overhead of repeated data packet transmission from the core network to the base station.
  • the SDAP layer before the SDAP layer directly sends the data that needs to be forwarded to the target SDAP layer, it further includes: the sending sequence number in the data information that the SDAP layer will receive Binding with the data that needs to be forwarded; the SDAP layer sends the data that needs to be forwarded directly to the target SDAP layer, including: the SDAP layer binds the data that needs to be forwarded according to the binding The sequence of sending sequence numbers is directly sent to the target SDAP layer.
  • the SDAP layer binds the transmission sequence number in the received data information with the corresponding data in the data that needs to be forwarded, so as to determine the sequence of sending the data that needs to be forwarded to the target SDAP layer .
  • the sending sequence number is an SN or a count value.
  • the sending sequence number is the SN or count value.
  • the SDAP layer after the SDAP layer sends the data that needs to be forwarded directly to the target SDAP layer, it further includes: the SDAP layer buffers the data sent by the upper layer that does not need to be forwarded. The forwarded data is directly sent to the target SDAP layer according to the receiving order.
  • the data in the buffered data that does not need to be forwarded is directly sent to the target SDAP layer in the receiving order, so as to better realize the data forwarding.
  • the method further includes: after receiving the retransmission instruction sent by the target SDAP layer, the SDAP layer determines that the buffer data is stored in the buffered data according to the data information that needs to be retransmitted in the retransmission instruction. Data that needs to be retransmitted; the SDAP layer directly sends the data determined to be retransmitted to the target SDAP layer in the order of the bound sending sequence numbers.
  • the SDAP layer determines the data that needs to be retransmitted in the buffered data according to the data information that needs to be retransmitted in the retransmission instruction; the SDAP layer will The data determined to be retransmitted are directly sent to the target SDAP layer.
  • the time delay of data packet transmission is reduced, and the overhead of repeated data packet transmission from the core network to the base station is also reduced.
  • the SDAP layer determines the data that needs to be forwarded, before sending the data that needs to be forwarded directly to the target SDAP layer, it further includes: the SDAP layer maps QoS flow To the corresponding DRB; after the SDAP layer sends the data that needs to be forwarded directly to the target SDAP layer, it also includes: the SDAP layer clears the mapping information of Qos flow and DRB.
  • the SDAP layer maps the Qos flow to the corresponding DRB to prepare for data forwarding, and after the SDAP layer directly sends the data that needs to be forwarded to the target SDAP layer, the SDAP layer The layer clears the mapping information between Qos flow and DRB.
  • a data forwarding method provided by an embodiment of the present disclosure includes:
  • the target SDAP layer receives the data sent by the SDAP layer, where the data is the data that needs to be forwarded determined after the SDAP layer receives the upper layer re-establishment request: Finally, the target SDAP layer parses the data to obtain SDAP SDU, And send the SDAP SDU to the upper layer according to the receiving order.
  • the target SDAP layer receives the data that needs to be forwarded sent by the SDAP layer after receiving the upper layer re-establishment request to the target SDAP layer, providing a SDAP data forwarding solution, which improves 5G performance.
  • the method further includes: the target SDAP layer determines that the upper layer After the sending sequence number of the sent data is interrupted, a retransmission instruction carrying the interrupted sending sequence number is sent to the SDAP layer.
  • the target SDAP layer determines that it needs to send a retransmission instruction carrying the interrupted sending sequence number to the SDAP layer according to the interruption of the sending sequence number of the sent data.
  • an embodiment of the present disclosure provides a data forwarding device, including a processor and a transceiver:
  • the processor is configured to receive an upper layer re-establishment request; after determining the data that needs to be forwarded, it directly sends the data that needs to be forwarded to the target SDAP layer through the transceiver.
  • an embodiment of the present disclosure provides a data forwarding device, including a processor and a transceiver:
  • the processor is configured to receive data sent by the SDAP layer through a transceiver, where the data is data that is determined to be forwarded after the SDAP layer receives the upper layer re-establishment request: the data is analyzed to obtain the SDAP SDU, And send the SDAP SDU to the upper layer according to the receiving order.
  • the embodiments of the present disclosure also provide a data forwarding device, which includes:
  • At least one processing unit and at least one storage unit wherein the storage unit stores program code, and when the program code is executed by the processing unit, the processing unit is caused to execute each of the above-mentioned aspects of the first aspect.
  • the processing unit stores program code, and when the program code is executed by the processing unit, the processing unit is caused to execute each of the above-mentioned aspects of the first aspect.
  • the embodiments of the present disclosure also provide a data forwarding device, which includes:
  • At least one processing unit and at least one storage unit wherein the storage unit stores program code, and when the program code is executed by the processing unit, the processing unit is caused to execute each of the above-mentioned second aspects.
  • the processing unit stores program code, and when the program code is executed by the processing unit, the processing unit is caused to execute each of the above-mentioned second aspects.
  • the present disclosure also provides a computer storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the method described in any one of the first aspects are implemented.
  • the present disclosure also provides a computer storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the method in any one of the second aspects are implemented.
  • FIG. 1 is a schematic diagram of a data forwarding method according to an embodiment of the disclosure
  • FIG. 2 is a schematic structural diagram of a first data forwarding device according to an embodiment of the disclosure
  • FIG. 3 is a schematic structural diagram of a second data forwarding device according to an embodiment of the disclosure.
  • FIG. 4 is a schematic structural diagram of a third data forwarding device in an embodiment of the disclosure.
  • FIG. 5 is a schematic structural diagram of a fourth data forwarding device according to an embodiment of the disclosure.
  • FIG. 6 is a schematic flowchart of the first data forwarding method according to an embodiment of the disclosure.
  • FIG. 7 is a schematic flowchart of a second data forwarding method according to an embodiment of the disclosure.
  • the term “plurality” refers to two or more, and other quantifiers are similar.
  • the "PDCP” referred to in the embodiments of the present disclosure is an abbreviation for the Packet Data Convergence Protocol.
  • SDAP refers to a service discovery application profile is defined for traffic investigation. It is responsible for searching for known or specific businesses, as well as for general business searches and browsing.
  • the "data forwarding" referred to in the embodiments of the present disclosure mainly refers to that the CPU copies the output value of one unit to the input value of another unit within one clock cycle.
  • an embodiment of the present disclosure provides a data forwarding method, which specifically includes the following steps:
  • Step 100 The SDAP layer receives the upper layer re-establishment request
  • Step 101 After determining the data that needs to be forwarded, the SDAP layer directly sends the data that needs to be forwarded to the target SDAP layer;
  • Step 102 The target SDAP layer receives data sent by the SDAP layer, where the data is data that is determined to be forwarded after the SDAP layer receives the upper layer re-establishment request;
  • Step 103 The target SDAP layer parses the data to obtain a SDAP SDU, and sends the SDAP SDU to the upper layer in the order of reception.
  • the above method receives the upper layer re-establishment request through the SDAP layer, determines the data that needs to be forwarded, and sends the data that needs to be forwarded directly to the target SDAP layer, providing a SDAP data forwarding scheme, which improves 5G performance.
  • the SDAP layer After the SDAP layer receives the upper layer re-establishment request, it stops sending data packets to the PDCP layer, and receives the data packets sent by the upper layer, and maps the Qos flow to the corresponding DRB according to the instruction information in the re-establishment request.
  • the SDAP layer receives the data packet sent by the upper layer, it stores the data packet according to the order in which the data packet is received.
  • the SDAP layer Before performing data forwarding, the SDAP layer needs to determine the data to be forwarded, wherein the SDAP layer determines from the buffered data that forwarding is required according to the forwarded data information sent by the received PDCP layer
  • the SDAP layer determines the data that needs to be forwarded from the cached data according to the storage address information in the received forwarded data information sent by the PDCP layer.
  • the SDAP layer binds the transmission sequence number in the received data information with the data that needs to be forwarded.
  • the sending sequence number includes, but is not limited to, serial number (SN), COUNT, etc.
  • the SN cycle is short. When the amount of data to be forwarded is relatively large, SN can be used as the sending sequence number.
  • the COUNT The period is long, and when there are more data to be forwarded, in order to avoid the situation that multiple data to be forwarded correspond to the same SN, COUNT can be used as the sending sequence number, where the COUNT is determined by the superframe number. (Hyper Frame Number, HFN) and SN are composed of two parts.
  • the SDAP layer directly sends the data to be forwarded to the target SDAP layer in the order of the bound sending sequence numbers.
  • the sending sequence number only includes SN
  • the data to be forwarded includes data A, data B, and data C, wherein the SN corresponding to data A is 1, and the SN corresponding to data B is 3.
  • the SN corresponding to data C is 2, then the sending order is data A, data C, and data B.
  • the sending sequence number only includes COUNT
  • the data to be forwarded includes data A, data B, and data C, where the COUNT corresponding to data A is 12, and the COUNT corresponding to data B is 14.
  • the COUNT corresponding to data C is 13, then the sending order is data A, data C, and data B.
  • SDAP layer sent specifically:
  • the SDAP layer directly sends data that does not need to be forwarded among the buffered data sent by the upper layer to the target SDAP layer according to the receiving order.
  • the target SDAP layer receives the data that needs to be forwarded after receiving the upper layer re-establishment request sent by the SDAP layer, and receives the data that needs to be forwarded sent by the SDAP layer. Other data sent by the SDAP layer.
  • the target SDAP layer parses the received data to obtain the SDAP SDU, and sends the SDAP SDU to the upper layer in the order of reception.
  • the SDAP layer when the SDAP layer completes the re-establishment process, there may be data packets that were not sent correctly. Therefore, the SDAP layer needs to retransmit the data packets that were not sent correctly.
  • the embodiments of the present disclosure perform reconfiguration according to the confirmation needs. The situation is different, and we will introduce them separately:
  • Case 1 The target SDAP layer, after determining that the received transmission sequence number of the data sent by the SDAP layer is interrupted, sends a retransmission instruction carrying the interrupted transmission sequence number to the SDAP layer.
  • Case 2 After the target SDAP layer determines that the sending sequence number of the data sent to the upper layer is interrupted, it sends a retransmission instruction carrying the interrupted sending sequence number to the SDAP layer.
  • the SDAP layer after receiving the retransmission instruction sent by the target SDAP layer, determines the data in the buffered data that needs to be retransmitted according to the data information in the retransmission instruction that needs to be retransmitted, and then the determination needs to be performed
  • the retransmitted data is directly sent to the target SDAP layer.
  • the SDAP layer buffers the data sent by the upper layer, and then after receiving the retransmission instruction sent by the target SDAP layer, according to the data information that needs to be retransmitted in the retransmission instruction, it determines which of the buffered data needs to be retransmitted Finally, the SDAP layer directly sends the data determined to be retransmitted to the target SDAP layer. It better reduces the delay of data packet transmission, and at the same time reduces the overhead of repeated data packet transmission from the core network to the base station.
  • the SDAP layer directly sends the data that needs to be forwarded to the target SDAP layer, and then clears the mapping information of Qos flow and DRB.
  • various aspects of a data forwarding method provided in the embodiments of the present disclosure can also be implemented in the form of a program product, which includes program code, when the program code is on a computer device When running, the program code is used to make the computer device execute the steps in the data forwarding method according to various exemplary embodiments of the present disclosure described in this specification.
  • the program product may employ any combination of one or more readable media.
  • the readable medium may be a readable signal medium or a readable storage medium.
  • the readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: electrical connections with one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable Type programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.
  • the program product for data forwarding may adopt a portable compact disk read-only memory (CD-ROM) and include program code, and may run on a server device.
  • CD-ROM portable compact disk read-only memory
  • the program product of the present disclosure is not limited thereto.
  • the readable storage medium can be any tangible medium that contains or stores a program, and the program can be used by or in combination with an information transmission, device, or device.
  • the readable signal medium may include a data signal that is propagated in baseband or as part of a carrier wave, in which readable program code is carried. This propagated data signal can take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above.
  • the readable signal medium may also be any readable medium other than a readable storage medium, and the readable medium may send, propagate, or transmit a program for use by or in conjunction with a periodic network action system, apparatus, or device.
  • the program code contained on the readable medium can be transmitted by any suitable medium, including, but not limited to, wireless, wired, optical cable, RF, etc., or any suitable combination of the above.
  • the program code used to perform the operations of the present disclosure can be written in any combination of one or more programming languages.
  • the programming languages include object-oriented programming languages—such as Java, C++, etc., as well as conventional procedural styles. Programming language-such as "C" language or similar programming language.
  • the program code may be executed entirely on the user computing device, partly on the user device, as an independent software package, partly on the user computing device and partly on the remote computing device, or entirely on the remote computing device or server To execute.
  • the remote computing device may be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device.
  • LAN local area network
  • WAN wide area network
  • an embodiment of the present disclosure provides a data forwarding device, including: a processor 200 and a transceiver 201:
  • the processor 200 is configured to receive an upper layer re-establishment request; after determining the data that needs to be forwarded, it directly sends the data that needs to be forwarded to the target SDAP layer through the transceiver.
  • processor 200 is further configured to:
  • the data to be forwarded is determined from the buffered data.
  • processor 200 is further configured to:
  • the processor 200 is specifically configured to:
  • the data to be forwarded is directly sent to the target SDAP layer in the order of the bound sending sequence numbers.
  • the sending sequence number is an SN or count value.
  • processor 200 is further configured to:
  • the data that does not need to be forwarded among the buffered data sent by the upper layer is directly sent to the target SDAP layer according to the receiving order.
  • processor 200 is further configured to:
  • the data in the buffered data that needs to be retransmitted is determined according to the data information in the retransmission instruction that needs to be retransmitted;
  • the order of the predetermined sending sequence number is directly sent to the target SDAP layer.
  • processor 200 is further configured to:
  • the processor 200 After the processor 200 directly sends the data that needs to be forwarded to the target SDAP layer, it is also used to clear the mapping information of Qos flow and DRB.
  • the present disclosure provides a data forwarding device, which includes:
  • At least one processing unit 300 and at least one storage unit 301 wherein the storage unit stores program code, and when the program code is executed by the processing unit, the processing unit is caused to perform the following process:
  • the data that needs to be forwarded is directly sent to the target SDAP layer through the transceiver.
  • processing unit 300 is further configured to:
  • the data to be forwarded is determined from the buffered data.
  • processing unit 300 is further configured to:
  • the processing unit 300 is specifically configured to:
  • the data to be forwarded is directly sent to the target SDAP layer in the order of the bound sending sequence numbers.
  • the sending sequence number is an SN or count value.
  • processing unit 300 is further configured to:
  • the data that does not need to be forwarded among the buffered data sent by the upper layer is directly sent to the target SDAP layer according to the receiving order.
  • processing unit 300 is further configured to:
  • the data in the buffered data that needs to be retransmitted is determined according to the data information in the retransmission instruction that needs to be retransmitted;
  • the order of the predetermined sending sequence number is directly sent to the target SDAP layer.
  • processing unit 300 is further configured to:
  • processing unit 300 After the processing unit 300 directly sends the data that needs to be forwarded to the target SDAP layer, it is also used to clear the mapping information of Qos flow and DRB.
  • an embodiment of the present disclosure provides a data forwarding device, including a processor 400 and a transceiver 401:
  • the processor 400 is configured to receive data sent by the SDAP layer through a transceiver, where the data is data determined by the SDAP layer to need to be forwarded after receiving the upper layer re-establishment request: parse the data to obtain the SDAP SDU , And send the SDAP SDU to the upper layer in the receiving order.
  • processor 400 is further configured to:
  • the present disclosure provides a data forwarding device, which includes:
  • At least one processing unit 500 and at least one storage unit 501 wherein the storage unit stores program code, and when the program code is executed by the processing unit, the processing unit is caused to perform the following process:
  • the data is the data that needs to be forwarded determined after the SDAP layer receives the upper layer re-establishment request: the data is analyzed to obtain the SDAP SDU, and the SDAP The SDU is sent to the upper layer in the order of reception.
  • processing unit 500 is further configured to:
  • the embodiment of the present disclosure also provides a non-volatile readable storage medium, including program code, and when the program code runs on a computing device, the program code is used to cause the computing device to perform a data forwarding method A step of.
  • the sending device and the receiving device may include a hardware structure and/or a software module, and the above functions are realized in the form of a hardware structure, a software module, or a hardware structure plus a software module . Whether one of the above functions is executed in a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application of the technical solution and design constraints.
  • a data forwarding method provided by an embodiment of the present disclosure specifically includes the following steps:
  • Step 600 The SDAP layer receives the upper layer re-establishment request
  • Step 601 The SDAP layer stops sending data packets to the PDCP layer, maps the Qos flow to the corresponding DRB according to the instruction information in the re-establishment request, and caches the data sent by the upper layer;
  • Step 602 The SDAP layer receives the forwarded data information sent by the PDCP layer.
  • Step 603 The SDAP layer determines the data that needs to be forwarded from the cached data sent by the upper layer according to the storage address in the received data information.
  • Step 604 The SDAP layer binds the transmission sequence number in the received data information with the data that needs to be forwarded;
  • Step 605 The SDAP layer directly sends the data to be forwarded to the target SDAP layer in the order of the bound sending sequence numbers;
  • Step 606 The target SDAP layer receives the data that needs to be forwarded sent by the SDAP layer.
  • Step 607 The SDAP layer directly sends the buffered data sent by the upper layer that is not the data that needs to be forwarded to the target SDAP layer in the receiving order;
  • Step 608 The target SDAP layer receives the data that does not need to be forwarded sent by the SDAP layer;
  • Step 609 The target SDAP layer parses the data to obtain an SDAP SDU
  • Step 610 The target SDAP layer sends the SDAP SDU to the upper layer in the order of reception.
  • Step 611 The SDAP layer clears the mapping information of Qos flow and DRB.
  • a method for data forwarding provided by an embodiment of the present disclosure specifically includes the following steps:
  • Step 700 The target SDAP layer determines that the sending sequence number of the data sent to the upper layer is interrupted
  • Step 701 The target SDAP layer sends a retransmission instruction carrying the interrupted transmission sequence number to the SDAP layer;
  • Step 702 The SDAP layer receives a retransmission instruction sent by the target SDAP layer.
  • Step 703 The SDAP layer determines the data that needs to be retransmitted in the buffered data according to the data information that needs to be retransmitted in the retransmission instruction;
  • Step 704 The SDAP layer directly sends the data determined to be retransmitted to the target SDAP layer.
  • the present disclosure can also be implemented in hardware and/or software (including firmware, resident software, microcode, etc.). Still further, the present disclosure may take the form of a computer-usable or computer-readable storage medium on a computer-readable storage medium with computer-usable or computer-readable program code implemented in the medium to be used by an instruction execution system or Used in conjunction with an instruction execution system.
  • a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, transmit, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device, Use of device or equipment.

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Abstract

本公开实施例公开了一种数据前转的方法和设备。本公开实施例在进行数据前转时，首先SDAP层接收上层重建立请求；最后所述SDAP层确定需要进行前转的数据后，将所述需要进行前转的数据直接向目标SDAP层发送。

Description

数据前转的方法和设备
相关申请的交叉引用
本申请主张在2019年1月17日在中国提交的中国专利申请号No.201910043864.4的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及无线技术领域，特别涉及一种数据前转的方法和设备。
背景技术
在5G时代，因为简单分布式文件传输系统访问协议(Simple DFS Access Protocol，SDAP)层的引入，相当于IP包在AS层出现了处理代理，其中，SDAP层的作用是传输用户面的数据，负责把服务质量流(Quality of Service flow，Qos flow)映射到的终端与基站之间的数据承载(Data RB，DRB)上，其中，QoS flow上承载的都是IP包。目前的系统中，当分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)重建立完成后，PDCP层没有正确发送的数据包只能通过上层进行重传。这种数据包的发送方式带来了数据包发送的过长时延。
而依靠SDAP可以实现数据包的无缝切换，并可以有效的解决因PDCP层在普通数据传输模式UM模式下，进行数据前转时数据丢失后只能靠更高层的重传进行的问题，以及PDCP本身在准确性的要求高的数据传输模式AM模式下，进行数据前转时数据的内容可能发生变化，存在很大风险的问题。
但是目前并没有针对5G中SDAP特点进行数据前转的方案。
发明内容
本公开实施例提供一种数据包前转的方法和设备，用以解决目前没有针对SDAP进行数据前转的问题。
第一方面，本公开实施例提供的一种数据前转的方法包括：
首先SDAP层接收上层重建立请求；最后所述SDAP层确定需要进行前转的数据后，将所述需要进行前转的数据直接向目标SDAP层发送。
上述方法，通过SDAP层接收上层重建立请求，确定需要进行前转的数据，并将所述需要进行前转的数据直接向目标SDAP层发送，提供了一种SDAP的数据前转方案，提高了5G性能。
在一种可能的实现方式中，所述SDAP层接收上层重建立请求之后，确定需要进行前转的数据之前，还包括：所述SDAP层停止向PDCP层发送数据包，并缓存上层发送的数据；所述SDAP层确定需要进行前转的数据，包括：所述SDAP层根据接收到的所述PDCP层发送的前转数据信息，从缓存的所述数据中确定需要进行前转的数据。
上述方法，所述SDAP层缓存上层发送的数据，并根据接收到的所述PDCP层发送的前转数据信息，从缓存的所述数据中确定需要进行前转的数据，从而在数据前转过程中若有需要上层重传的数据时，可直接在SDAP层进行重传，更好的降低数据包发送的时延，同时降低数据包重复从核心网向基站发送的开销。
在一种可能的实现方式中，所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送之前，还包括：所述SDAP层将接收到的所述数据信息中的发送顺序号与需要进行前转的数据进行绑定；所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送，包括：所述SDAP层将所述需要进行前转的数据按照绑定的发送顺序号的顺序，直接发送给目标SDAP层。
上述方法，所述SDAP层通过将收到的所述数据信息中的发送顺序号与需要进行前转的数据中对应的数据进行绑定，从而确定向目标SDAP层发送需要进行前转数据的顺序。
在一种可能的实现方式中，所述发送顺序号为SN或count值。
上述方法，介绍了所述发送顺序号为SN或count值。
在一种可能的实现方式中，所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送之后，还包括：所述SDAP层将缓存的所述上层发送的数据中不需要进行前转的数据按照接收顺序直接向目标SDAP层发送。
上述方法，所述SDAP层在将需要进行前转的数据发送完成后，将所述缓存数据中不需要进行前转的数据按照接收顺序直接向目标SDAP层发送，更好的实现数据前转。
在一种可能的实现方式中，所述方法还包括：所述SDAP层在收到目标SDAP层发送的重传指令后，根据重传指令中需要进行重传的数据信息确定所述缓存数据中需要进行重传的数据；所述SDAP层将所述确定需要进行重传的数据按照绑定的发送顺序号的顺序，直接向所述目标SDAP层发送。
上述方法，所述SDAP层在收到目标SDAP层发送的重传指令后，根据重传指令中需要进行重传的数据信息确定所述缓存数据中需要进行重传的数据；所述SDAP层将所述确定需要进行重传的数据直接向所述目标SDAP层发送。降低了数据包发送的时延，同时降低了数据包重复从核心网向基站发送的开销。
在一种可能的实现方式中，所述SDAP层确定需要进行前转的数据后，将所述需要进行前转的数据直接向目标SDAP层发送之前，还包括：所述SDAP层将Qos flow映射到对应的DRB上；所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送之后，还包括：所述SDAP层清空Qos flow和DRB的映射信息。
上述方法，所述SDAP层将Qos flow映射到对应的DRB上，为数据前转做准备，并在所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送之后，所述SDAP层清空Qos flow和DRB的映射信息。
第二方面，本公开实施例提供的一种数据前转的方法包括：
首先目标SDAP层接收SDAP层发送的数据，其中所述数据为所述SDAP层接收上层重建立请求后确定的需要进行前转的数据：最后所述目标SDAP层对所述数据解析得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送。
上述方法，目标SDAP层接收SDAP层在收到上层重建立请求后，向所述目标SDAP层发送的需要进行前转的数据，提供了一种SDAP的数据前转方案，提高了5G性能。
在一种可能的实现方式中，所述目标SDAP层对所述SDAP PDU解析得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送之后，还包括：所述目标SDAP层在确定向上层发送的数据的发送顺序号出现中断后，向所述SDAP层发送携带中断的发送顺序号的重传指令。
上述方法，所述目标SDAP层根据发送的数据的发送顺序号出现中断确定需要向所述SDAP层发送携带中断的发送顺序号的重传指令。
第三方面，本公开实施例提供一种数据前转的设备，包括：处理器以及收发机：
所述处理器，用于接收上层重建立请求；确定需要进行前转的数据后，通过收发机将所述需要进行前转的数据直接向目标SDAP层发送。
第四方面，本公开实施例提供一种数据前转的设备，包括：处理器以及收发机：
所述处理器，用于通过收发机接收SDAP层发送的数据，其中所述数据为所述SDAP层接收上层重建立请求后确定的需要进行前转的数据：对所述数据解析得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送。
第五方面，本公开实施例还提供了一种数据前转的设备，该设备包括：
至少一个处理单元以及至少一个存储单元，其中，所述存储单元存储有程序代码，当所述程序代码被所述处理单元执行时，使得所述处理单元执行上述第一方面中任一方面的各实施例的功能。
第六方面，本公开实施例还提供了一种数据前转的设备，该设备包括：
至少一个处理单元以及至少一个存储单元，其中，所述存储单元存储有程序代码，当所述程序代码被所述处理单元执行时，使得所述处理单元执行上述第二方面中任一方面的各实施例的功能。
第七方面，本公开还提供一种计算机存储介质，其上存储有计算机程序，该程序被处理器执行时实现第一方面中任一方面所述方法的步骤。
第八方面，本公开还提供一种计算机存储介质，其上存储有计算机程序，该程序被处理器执行时实现第二方面中任一方面所述方法的步骤。
另外，第三方面至第八方面中任意一种实现方式所带来的技术效果可参见第一方面至第二方面中不同实现方式所带来的技术效果，此处不再赘述。
附图说明
图1为本公开实施例一种数据前转的方法示意图；
图2为本公开实施例第一种数据前转的设备结构示意图；
图3为本公开实施例第二种数据前转的设备结构示意图；
图4为本公开实施例第三种数据前转的设备结构示意图；
图5为本公开实施例第四种数据前转的设备结构示意图；
图6为本公开实施例第一种数据前转的方法流程示意图；
图7为本公开实施例第二种数据前转的方法流程示意图。
具体实施方式
为了使本公开实施例的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施例作进一步地详细描述，显然，所描述的实施例仅仅是本公开实施例一部份实施例，而不是全部的实施例。基于本公开实施例中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本公开实施例保护的范围。
下面对文中出现的一些词语进行解释：
(1)本公开实施例中术语“多个”是指两个或两个以上，其它量词与之类似。
(2)“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
(3)本公开实施例所指的“PDCP”是对分组数据汇聚协议的一个简称。
(4)本公开实施例所指的“SDAP”是指 服务发现应用规范针对业务的调查进行 定义。它负责对已知或特定业务的搜索，及进行一些一般性的业务搜索和浏览。
(5)本公开实施例所指的“数据前转”主要指CPU在一个时钟周期内，把一个单元的输出值内容拷贝到另一个单元的输入值中。
如图1所示，本公开实施例提供一种数据前转的方法，具体包括以下步骤：
步骤100、SDAP层接收上层重建立请求；
步骤101、所述SDAP层确定需要进行前转的数据后，将所述需要进行前转的数据直接向目标SDAP层发送；
步骤102、目标SDAP层接收SDAP层发送的数据，其中所述数据为所述SDAP层接收上层重建立请求后确定的需要进行前转的数据；
步骤103、所述目标SDAP层对所述数据解析得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送。
上述方法，通过SDAP层接收上层重建立请求，确定需要进行前转的数据，并将所述需要进行前转的数据直接向目标SDAP层发送，提供了一种SDAP的数据前转方案，提高了5G性能。
其中，所述SDAP层接收上层重建立请求之后，停止向PDCP层发送数据包，并接收上层发送的数据包，根据重建立请求中的指令信息将Qos flow映射到对应的DRB上，其中，所述SDAP层在接收所述上层发送的数据包时，按照所述数据包接收到的先后顺序进行存储。
所述SDAP层在进行数据前转前，需要确定进行前转的数据，其中，所述SDAP层根据接收到的PDCP层发送的前转数据信息，从缓存的所述数据中确定需要进行前转的数据：
具体的，所述SDAP层根据接收到的PDCP层发送的前转数据信息中的存储地址信息，从缓存的所述数据中确定需要进行前转的数据。
其中，所述SDAP层在确定需要进行前转的数据之后，将接收到的所述数据信息中的发送顺序号与需要进行前转的数据进行绑定。
所述发送顺序号包括但不限于序列号(Serial Number，SN)、COUNT等，所述SN周期较短，当需要进行前转的数据较多少时，可以将SN作为发送顺序号，所述COUNT周期较长，当需要进行前转的数据较多时，为避免出现多个需要进行前转的数据对应相同的SN的情况，可以将COUNT作为发送顺序号，其中，所述COUNT是由超帧号(Hyper Frame Number，HFN)与SN两部分组成的。
所述SDAP层将所述需要进行前转的数据按照绑定的发送顺序号的顺序，直接发送给目标SDAP层。
例如，当所述发送顺序号只包括SN时，所述需要进行前转的数据包括数据A、数据B、数据C，其中，所述数据A对应的SN为1，数据B对应的SN为3、数据C对应的SN为2，则所述发送顺序为数据A、数据C、数 据B。
例如，当所述发送顺序号只包括COUNT时，所述需要进行前转的数据包括数据A、数据B、数据C，其中，所述数据A对应的COUNT为12，数据B对应的COUNT为14、数据C对应的COUNT为13，则所述发送顺序为数据A、数据C、数据B。
其中，所述SDAP层将缓存的所述上层发送的数据中需要进行前转的数据发送给目标SDAP层后，还需将缓存的所述上层发送的数据中不需要进行前转的数据向目标SDAP层发送，具体的：
所述SDAP层将缓存的所述上层发送的数据中不需要进行前转的数据按照接收顺序直接向目标SDAP层发送。
其中，目标SDAP层接收SDAP层发送的通过所述SDAP层接收上层重建立请求后确定的需要进行前转的数据，并在接收完所述SDAP层发送的需要进行前转的数据后，接收所述SDAP层发送的其他数据。
所述目标SDAP层对接收到的所述数据进行解析，从而得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送。
其中，所述SDAP层在完成重建立过程中，可能会存在没有正确发送的数据包，因此，所述SDAP层需要重新发送所述没有正确发送的数据包，本公开实施例根据确认需要进行重传的情况不同，分别进行介绍：
情况1：所述目标SDAP层在确定接收到的所述SDAP层发送的数据的发送顺序号出现中断后，向所述SDAP层发送携带中断的发送顺序号的重传指令。
情况2：所述目标SDAP层在确定向上层发送的数据的发送顺序号出现中断后，向所述SDAP层发送携带中断的发送顺序号的重传指令。
其中，所述SDAP层在收到目标SDAP层发送的重传指令后，根据重传指令中需要进行重传的数据信息确定所述缓存数据中需要进行重传的数据，将所述确定需要进行重传的数据直接向所述目标SDAP层发送。
上述方法，所述SDAP层缓存上层发送的数据，然后在收到目标SDAP层发送的重传指令后，根据重传指令中需要进行重传的数据信息确定所述缓存数据中需要进行重传的数据，最后所述SDAP层将所述确定需要进行重传 的数据直接向所述目标SDAP层发送。更好的降低了数据包发送的时延，同时降低了数据包重复从核心网向基站发送的开销。
本公开实施例中所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送之后，清空Qos flow和DRB的映射信息。
在一些可能的实施方式中，本公开实施例提供的对一种数据前转的方法的各个方面还可以实现为一种程序产品的形式，其包括程序代码，当所述程序代码在计算机设备上运行时，所述程序代码用于使所述计算机设备执行本说明书中描述的根据本公开各种示例性实施方式的数据前转的方法中的步骤。
所述程序产品可以采用一个或多个可读介质的任意组合。可读介质可以是可读信号介质或者可读存储介质。可读存储介质例如可以是——但不限于——电、磁、光、电磁、红外线、或半导体的系统、装置或器件，或者任意以上的组合。可读存储介质的更具体的例子(非穷举的列表)包括：具有一个或多个导线的电连接、便携式盘、硬盘、随机存取存储器(RAM)、只读存储器(ROM)、可擦式可编程只读存储器(EPROM或闪存)、光纤、便携式紧凑盘只读存储器(CD-ROM)、光存储器件、磁存储器件、或者上述的任意合适的组合。
根据本公开的实施方式的用于数据前转的程序产品，其可以采用便携式紧凑盘只读存储器(CD-ROM)并包括程序代码，并可以在服务器设备上运行。然而，本公开的程序产品不限于此，在本文件中，可读存储介质可以是任何包含或存储程序的有形介质，该程序可以被信息传输、装置或者器件使用或者与其结合使用。
可读信号介质可以包括在基带中或者作为载波一部分传播的数据信号，其中承载了可读程序代码。这种传播的数据信号可以采用多种形式，包括——但不限于——电磁信号、光信号或上述的任意合适的组合。可读信号介质还可以是可读存储介质以外的任何可读介质，该可读介质可以发送、传播或者传输用于由周期网络动作系统、装置或者器件使用或者与其结合使用的程序。
可读介质上包含的程序代码可以用任何适当的介质传输，包括——但不限于——无线、有线、光缆、RF等等，或者上述的任意合适的组合。
可以以一种或多种程序设计语言的任意组合来编写用于执行本公开操作 的程序代码，所述程序设计语言包括面向对象的程序设计语言—诸如Java、C++等，还包括常规的过程式程序设计语言—诸如“C”语言或类似的程序设计语言。程序代码可以完全地在用户计算设备上执行、部分地在用户设备上执行、作为一个独立的软件包执行、部分在用户计算设备上部分在远程计算设备上执行、或者完全在远程计算设备或服务器上执行。在涉及远程计算设备的情形中，远程计算设备可以通过任意种类的网络——包括局域网(LAN)或广域网(WAN)—连接到用户计算设备，或者，可以连接到外部计算设备。
如图2所示，本公开实施例提供一种数据前转的设备，包括：处理器200以及收发机201：
所述处理器200，用于接收上层重建立请求；确定需要进行前转的数据后，通过收发机将所述需要进行前转的数据直接向目标SDAP层发送。
可选的，所述处理器200还用于：
接收上层重建立请求之后，停止向PDCP层发送数据包，并缓存上层发送的数据；
根据接收到的所述PDCP层发送的前转数据信息，从缓存的所述数据中确定需要进行前转的数据。
可选的，所述处理器200还用于：
将接收到的所述数据信息中的发送顺序号与需要进行前转的数据进行绑定；
所述处理器200具体用于：
将所述需要进行前转的数据按照绑定的发送顺序号的顺序，直接发送给目标SDAP层。
可选的，所述发送顺序号为SN或count值。
可选的，所述处理器200还用于：
将缓存的所述上层发送的数据中不需要进行前转的数据按照接收顺序直接向目标SDAP层发送。
可选的，所述处理器200还用于：
在收到目标SDAP层发送的重传指令后，根据重传指令中需要进行重传的数据信息确定所述缓存数据中需要进行重传的数据；将所述确定需要进行 重传的数据按照绑定的发送顺序号的顺序，直接向所述目标SDAP层发送。
可选的，所述处理器200还用于：
将Qos flow映射到对应的DRB上；
所述处理器200将所述需要进行前转的数据直接向目标SDAP层发送之后，还用于：清空Qos flow和DRB的映射信息。
如图3所示，本公开提供一种数据前转的设备，该设备包括：
至少一个处理单元300以及至少一个存储单301元，其中，所述存储单元存储有程序代码，当所述程序代码被所述处理单元执行时，使得所述处理单元执行下列过程：
用于接收上层重建立请求；确定需要进行前转的数据后，通过收发机将所述需要进行前转的数据直接向目标SDAP层发送。
可选的，所述处理单元300还用于：
接收上层重建立请求之后，停止向PDCP层发送数据包，并缓存上层发送的数据；
根据接收到的所述PDCP层发送的前转数据信息，从缓存的所述数据中确定需要进行前转的数据。
可选的，所述处理单元300还用于：
将接收到的所述数据信息中的发送顺序号与需要进行前转的数据进行绑定；
所述处理单元300具体用于：
将所述需要进行前转的数据按照绑定的发送顺序号的顺序，直接发送给目标SDAP层。
可选的，所述发送顺序号为SN或count值。
可选的，所述处理单元300还用于：
将缓存的所述上层发送的数据中不需要进行前转的数据按照接收顺序直接向目标SDAP层发送。
可选的，所述处理单元300还用于：
在收到目标SDAP层发送的重传指令后，根据重传指令中需要进行重传的数据信息确定所述缓存数据中需要进行重传的数据；将所述确定需要进行 重传的数据按照绑定的发送顺序号的顺序，直接向所述目标SDAP层发送。
可选的，所述处理单元300还用于：
将Qos flow映射到对应的DRB上；
所述处理单元300将所述需要进行前转的数据直接向目标SDAP层发送之后，还用于：清空Qos flow和DRB的映射信息。
如图4所示，本公开实施例提供一种数据前转的设备，包括：处理器400以及收发机401：
所述处理器400：用于通过收发机接收SDAP层发送的数据，其中所述数据为所述SDAP层接收上层重建立请求后确定的需要进行前转的数据：对所述数据解析得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送。
可选的，所述处理器400还用于：
在确定向上层发送的数据的发送顺序号出现中断后，向所述SDAP层发送携带中断的发送顺序号的重传指令。
如图5所示，本公开提供一种数据前转的设备，该设备包括：
至少一个处理单元500以及至少一个存储单501元，其中，所述存储单元存储有程序代码，当所述程序代码被所述处理单元执行时，使得所述处理单元执行下列过程：
用于通过收发机接收SDAP层发送的数据，其中所述数据为所述SDAP层接收上层重建立请求后确定的需要进行前转的数据：对所述数据解析得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送。
可选的，所述处理单元500还用于：
在确定向上层发送的数据的发送顺序号出现中断后，向所述SDAP层发送携带中断的发送顺序号的重传指令。
本公开实施例还提供一种非易失性可读存储介质，包括程序代码，当所述程序代码在计算设备上运行时，所述程序代码用于使所述计算设备执行数据前转的方法的步骤。
为了实现上述本公开实施例提供的方法中的各功能，发送设备以及接收设备可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构 加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
如图6所示，本公开实施例提供的一种数据前转的方法，具体包括以下步骤：
步骤600、SDAP层接收上层重建立请求；
步骤601、所述SDAP层停止向PDCP层发送数据包，根据重建立请求中的指令信息将Qos flow映射到对应的DRB上，并缓存上层发送的数据；
步骤602、所述SDAP层接收所述PDCP层发送的前转数据信息；
步骤603、所述SDAP层根据接收到的所述数据信息中的存储地址从缓存的所述上层发送的数据中确定需要进行前转的数据；
步骤604、所述SDAP层将接收到的所述数据信息中的发送顺序号与需要进行前转的数据进行绑定；
步骤605、所述SDAP层将所述需要进行前转的数据按照绑定的发送顺序号的顺序，直接发送给目标SDAP层；
步骤606、目标SDAP层接收SDAP层发送的所述需要进行前转的数据；
步骤607、所述SDAP层将缓存的所述上层发送的数据中非所述需要进行前转的数据按照接收顺序直接向目标SDAP层发送；
步骤608、目标SDAP层接收SDAP层发送的非所述需要进行前转的数据；
步骤609、所述目标SDAP层对所述数据解析得到SDAP SDU；
步骤610、所述目标SDAP层将所述SDAP SDU按照接收顺序向上层发送。
步骤611、所述SDAP层清空Qos flow和DRB的映射信息。
如图7所示，本公开实施例提供的一种数据前转的方法，具体包括以下步骤：
步骤700、所述目标SDAP层确定向上层发送的数据的发送顺序号出现中断；
步骤701、所述目标SDAP层向所述SDAP层发送携带中断的发送顺序 号的重传指令；
步骤702、所述SDAP层接收所述目标SDAP层发送的重传指令；
步骤703、所述SDAP层根据重传指令中需要进行重传的数据信息确定所述缓存数据中需要进行重传的数据；
步骤704、所述SDAP层将所述确定需要进行重传的数据直接向所述目标SDAP层发送。
以上参照示出根据本公开实施例的方法、装置(系统)和/或计算机程序产品的框图和/或流程图描述本公开。应理解，可以通过计算机程序指令来实现框图和/或流程图示图的一个块以及框图和/或流程图示图的块的组合。可以将这些计算机程序指令提供给通用计算机、专用计算机的处理器和/或其它可编程数据处理装置，以产生机器，使得经由计算机处理器和/或其它可编程数据处理装置执行的指令创建用于实现框图和/或流程图块中所指定的功能/动作的方法。
相应地，还可以用硬件和/或软件(包括固件、驻留软件、微码等)来实施本公开。更进一步地，本公开可以采取计算机可使用或计算机可读存储介质上的计算机程序产品的形式，其具有在介质中实现的计算机可使用或计算机可读程序代码，以由指令执行系统来使用或结合指令执行系统而使用。在本公开上下文中，计算机可使用或计算机可读介质可以是任意介质，其可以包含、存储、通信、传输、或传送程序，以由指令执行系统、装置或设备使用，或结合指令执行系统、装置或设备使用。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (20)

  1. 一种数据前转的方法，包括：
    简单分布式文件传输系统访问协议SDAP层接收上层重建立请求；
    所述SDAP层确定需要进行前转的数据后，将所述需要进行前转的数据直接向目标SDAP层发送。
  2. 如权利要求1所述的方法，其中，所述SDAP层接收上层重建立请求之后，确定需要进行前转的数据之前，还包括：
    所述SDAP层停止向目标分组数据汇聚协议PDCP层发送数据包，并缓存上层发送的数据；
    所述SDAP层确定需要进行前转的数据，包括：
    所述SDAP层根据接收到的所述PDCP层发送的前转数据信息，从缓存的所述数据中确定需要进行前转的数据。
  3. 如权利要求2所述的方法，其中，所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送之前，还包括：
    所述SDAP层将接收到的所述数据信息中的发送顺序号与需要进行前转的数据进行绑定；
    所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送，包括：
    所述SDAP层将所述需要进行前转的数据按照绑定的发送顺序号的顺序，直接发送给目标SDAP层。
  4. 如权利要求3所述的方法，其中，所述发送顺序号为SN或count值。
  5. 如权利要求1～4任一所述的方法，其中，所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送之后，还包括：
    所述SDAP层将缓存的所述上层发送的数据中不需要进行前转的数据按照接收顺序直接向目标SDAP层发送。
  6. 如权利要求3所述的方法，还包括：
    所述SDAP层在收到目标SDAP层发送的重传指令后，根据重传指令中需要进行重传的数据信息确定所述缓存数据中需要进行重传的数据；
    所述SDAP层将所述确定需要进行重传的数据按照绑定的发送顺序号的顺序，直接向所述目标SDAP层发送。
  7. 如权利要求1所述的方法，其中，所述SDAP层确定需要进行前转的数据后，将所述需要进行前转的数据直接向目标SDAP层发送之前，还包括：
    所述SDAP层将Qos flow映射到对应的DRB上；
    所述SDAP层将所述需要进行前转的数据直接向目标SDAP层发送之后，还包括：
    所述SDAP层清空Qos flow和DRB的映射信息。
  8. 一种数据前转的方法，包括：
    目标SDAP层接收SDAP层发送的数据，其中所述数据为所述SDAP层接收上层重建立请求后确定的需要进行前转的数据；
    所述目标SDAP层对所述数据解析得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送。
  9. 如权利要求8所述的方法，其中，所述目标SDAP层对所述SDAP PDU解析得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送之后，还包括：
    所述目标SDAP层在确定向上层发送的数据的发送顺序号出现中断后，向所述SDAP层发送携带中断的发送顺序号的重传指令。
  10. 一种数据前转的设备，包括：处理器以及收发机：
    所述处理器，用于接收上层重建立请求；确定需要进行前转的数据后，通过收发机将所述需要进行前转的数据直接向目标SDAP层发送。
  11. 如权利要求10所述的设备，其中，所述处理器还用于：
    接收上层重建立请求之后，停止向PDCP层发送数据包，并缓存上层发送的数据；
    根据接收到的所述PDCP层发送的前转数据信息，从缓存的所述数据中确定需要进行前转的数据。
  12. 如权利要求11所述的设备，其中，所述处理器将所述需要进行前转的数据直接向目标SDAP层发送之前，还用于：
    将接收到的所述数据信息中的发送顺序号与需要进行前转的数据进行绑 定；
    所述处理器将所述需要进行前转的数据直接向目标SDAP层发送，具体用于：
    将所述需要进行前转的数据按照绑定的发送顺序号的顺序，直接发送给目标SDAP层。
  13. 如权利要求12所述的设备，其中，所述发送顺序号为SN或count值。
  14. 如权利要求10～13任一所述的设备，其中，所述处理器还用于：
    将缓存的所述上层发送的数据中不需要进行前转的数据按照接收顺序直接向目标SDAP层发送。
  15. 如权利要求12所述的设备，其中，所述处理器还用于：
    在收到目标SDAP层发送的重传指令后，根据重传指令中需要进行重传的数据信息确定所述缓存数据中需要进行重传的数据；将所述确定需要进行重传的数据按照绑定的发送顺序号的顺序，直接向所述目标SDAP层发送。
  16. 如权利要求10所述的设备，其中，所述处理器还用于：
    将Qos flow映射到对应的DRB上；
    所述处理器将所述需要进行前转的数据直接向目标SDAP层发送之后，还用于：
    清空Qos flow和DRB的映射信息。
  17. 一种数据前转的设备，包括：处理器以及收发机：
    所述处理器，用于通过收发机接收SDAP层发送的数据，其中所述数据为所述SDAP层接收上层重建立请求后确定的需要进行前转的数据：对所述数据解析得到SDAP SDU，并将所述SDAP SDU按照接收顺序向上层发送。
  18. 如权利要求17所述的设备，其中，所述处理器还用于：
    在确定向上层发送的数据的发送顺序号出现中断后，向所述SDAP层发送携带中断的发送顺序号的重传指令。
  19. 一种数据前转的设备，该设备包括：至少一个处理单元以及至少一个存储单元，其中，所述存储单元存储有程序代码，当所述程序代码被所述处理单元执行时，使得所述处理单元执行权利要求1～7任一所述方法的步骤 或权利要求8～9任一所述方法的步骤。
  20. 一种计算机可存储介质，其上存储有计算机程序，该程序被处理器执行时实现如权利要求1～7任一所述方法的步骤或权利要求8～9任一所述方法的步骤。
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