CN111225423B

CN111225423B - Method and device for forwarding data

Info

Publication number: CN111225423B
Application number: CN201811427472.XA
Authority: CN
Inventors: 孙军帅
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2022-04-01
Anticipated expiration: 2038-11-27
Also published as: CN111225423A

Abstract

The embodiment of the invention discloses a data forwarding method and equipment, which are used for solving the problem that data forwarding is not carried out aiming at SDAP at present. When the embodiment of the invention carries out data forwarding, firstly, when the SDAP layer carries out reconstruction, the data needing forwarding is determined; and finally, the SDAP layer sends the data needing forwarding to a target PDCP layer. When the method is used for data forwarding, a data forwarding scheme of the SDAP is provided, and the 5G performance is improved.

Description

Method and device for forwarding data

Technical Field

The present invention relates to the field of wireless technologies, and in particular, to a method and a device for data forwarding.

Background

The information can be stored under a certain condition by means of Data, the stored information can be transmitted under a proper condition, wherein, in order to reduce the cost of Data use and improve the use efficiency of the Data, the Data is often forwarded, the Data forwarding algorithm is relatively simple and is the same for most routing protocols, and at present, after a Packet Data Convergence Protocol (PDCP)/Radio Link Control (RLC) starts a reconstruction process, the corresponding Protocol requires the PDCP to forward the Data so as to realize lossless handover.

With the introduction of the 5G concept, in the Data transmission process, an SDAP (Simple DFS Access Protocol) layer is introduced, where the SDAP layer is used to transmit Data of a user plane and is responsible for mapping Qos flow (Quality of Service flow) to DRB (Data RB, Data bearer between a terminal and a base station), where Qos flow is all carried by IP packets.

However, after the SDAP layer is introduced, data forwarding is performed on the DPCP layer according to the existing protocol, which is prone to errors, resulting in failure of data forwarding, and there is no scheme for performing data forwarding according to the characteristics of the SDAP in 5G.

Disclosure of Invention

The embodiment of the invention provides a method and equipment for forwarding a data packet, which are used for solving the problem that data forwarding is not performed aiming at SDAP at present.

In a first aspect, a method for forwarding data provided in an embodiment of the present invention includes:

firstly, when the SDAP layer is rebuilt, determining data needing forwarding; and finally, the SDAP layer sends the data needing forwarding to a target PDCP layer.

According to the method, the SDAP layer determines the data needing forwarding after receiving the reconstruction instruction through the reconstruction instruction sent to the SDAP layer, and finally sends the data needing forwarding to the target PDCP layer, so that a data forwarding scheme of the SDAP is provided, and the 5G performance is improved.

In one possible implementation, the SDAP layer is a source SDAP layer; the SDAP layer sends the data needing forwarding to a target PDCP layer, and the data needing forwarding comprises the following steps: the source SDAP layer sends the data to be forwarded to a target SDAP layer; and the target SDAP layer sends the received data needing forwarding to a lower layer.

In the method, the SDAP layer sends the data needing forwarding to the target PDCP layer through the target SDAP layer, thereby providing a data forwarding scheme among SDAP entities and improving the 5G performance.

In a possible implementation manner, the sending, by the SDAP layer, the data to be forwarded to the target PDCP layer further includes: the source SDAP layer sends an ending identifier and the last data in the data needing forwarding to the target PDCP layer through the target SDAP layer; or the source SDAP layer sends the ending mark to the target PDCP layer after sending the last data in the data needing forwarding to the target PDCP layer through the target SDAP layer.

In the method, the SDAP layer sends the ending identifier and the last data in the data needing forwarding to the target PDCP layer through the target SDAP layer; or after the SDAP layer sends the last data in the data needing forwarding to the target PDCP layer through the target SDAP layer, the SDAP layer sends an end identifier to the target PDCP layer, two modes of sending the end identifier are provided, and the adaptability is stronger.

In a possible implementation manner, the destination SDAP layer sends state information to the destination RRC layer after receiving the end identifier sent by the source SDAP layer; wherein, the state information includes successful information of data forwarding and/or successful information of NG (Not Graded) interface switching.

In the method, the target SDAP layer sends the state information to the target RRC layer after receiving the ending identifier sent by the SDAP layer, so that the target RRC can better know the data forwarding state.

In a possible implementation manner, the sending, by the destination SDAP layer, the received data to a lower layer includes: and the target SDAP layer sequentially transmits the received data to a lower layer according to the sequence of SN (Serial Number) numbers corresponding to the data.

In the method, the SDAP layer records the SN number of the data when determining the data needing forwarding, so as to determine the sending sequence of the data according to the SN number.

In a possible implementation manner, the sending, by the SDAP layer, the data to be forwarded to the target PDCP layer includes: and the SDAP layer directly transmits the data needing forwarding to the target PDCP layer.

In the method, the SDAP layer directly sends the data needing forwarding to the target PDCP layer, thereby providing a data forwarding scheme of the SDAP and improving the 5G performance.

In a possible implementation manner, before the directly delivering, by the SDAP layer, the data to be forwarded to the target PDCP layer, the method further includes: and after receiving the reestablishment instruction sent by the source PDCP layer, the SDAP layer determines the data needing forwarding.

In the method, the SDAP layer determines the data needing to be forwarded after receiving the reestablishment instruction sent by the source PDCP layer, and then directly sends the data needing to be forwarded to the target PDCP layer, thereby providing a data forwarding scheme in the SDAP entity and improving the 5G performance.

In a possible implementation manner, the directly delivering, by the SDAP layer, the data to be forwarded to the target PDCP layer includes: and the SDAP layer sequentially sends the received data to a target PDCP layer according to the SN sequence corresponding to the data.

In a second aspect, an embodiment of the present invention provides a device for data forwarding, including: a processor and a memory:

the processor is used for determining data needing forwarding when reconstruction is carried out; and sending the data needing forwarding to a target PDCP layer.

In a third aspect, an embodiment of the present invention further provides a device for data forwarding, where the device includes:

at least one processing unit and at least one memory unit, wherein the memory unit has stored program code which, when executed by the processing unit, causes the processing unit to perform the functions of the embodiments of any of the above-mentioned first aspects.

In a fourth aspect, the present application also provides a computer storage medium having a computer program stored thereon, which when executed by a processor, performs the steps of the method of any of the first aspects.

In addition, for technical effects brought by any one implementation manner of the second aspect to the fourth aspect, reference may be made to technical effects brought by different implementation manners of the first aspect, and details are not described here.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic diagram of a first data forwarding method according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first data forwarding apparatus according to an embodiment of the present invention;

FIG. 3 is a flow chart of a method between SDAP protocol entities according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a method in an SDAP protocol entity according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without any creative efforts shall fall within the protection scope of the embodiments of the present invention.

Some of the words that appear in the text are explained below:

(1) in the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

(2) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

(3) The core network in the embodiment of the invention mainly provides user connection, user management and service completion bearing, and is used as an interface for providing a bearing network to an external network.

(4) The PDCP referred by the embodiment of the invention is a short for packet data convergence protocol.

(5) The term "SDAP" in the embodiments of the present invention refers to the definition of service discovery application specification for service investigation. It is responsible for searching for known or specific services, and for some general service searching and browsing.

(6) The "RRC (Radio Resource Control, Radio Resource Control layer)" referred in the embodiments of the present invention mainly allocates Radio resources and sends related signaling.

(7) The 'data forwarding' referred to in the embodiment of the present invention mainly refers to that the CPU copies the output value content of one unit to the input value of another unit in one clock cycle.

As shown in fig. 1, an embodiment of the present invention provides a method for data forwarding, which specifically includes the following steps:

step 100, when the SDAP layer is rebuilt, determining data needing forwarding;

step 101, the SDAP layer sends the data to be forwarded to a target PDCP layer.

According to the method, the SDAP layer determines the data needing forwarding after receiving the reconstruction instruction through the reconstruction instruction sent to the SDAP layer, and finally sends the data needing forwarding to the target PDCP layer through the target SDAP layer, so that a data forwarding scheme of the SDAP is provided, and the 5G performance is improved.

The method for forwarding data in the embodiment of the present invention may be specifically divided into multiple cases, which are described below.

Case 1: data forwarding between SDAP protocol entities.

In the present process of data forwarding, the RRC layer sends a reestablishment command to the source PDCP layer, where the source PDCP layer forwards data, and in 5G, an SDAP layer is introduced.

The method specifically relates to an RRC layer, an SDAP layer, a destination SDAP layer, and a target PDCP layer, which are respectively described below.

The RRC layer is mainly used for determining to build a data transmission link; sending a reconstruction instruction to an SDAP layer so that the SDAP layer sends data needing forwarding to a target PDCP layer after receiving the reconstruction instruction;

the SDAP layer is mainly used for determining data needing forwarding when reconstruction is carried out; sending the data needing forwarding to a target PDCP layer through a target SDAP layer;

the target SDAP layer is mainly used for receiving the data which is transmitted by the SDAP layer and is forwarded; sending the received data to a lower layer;

and the target PDCP layer is mainly used for receiving the data which is transmitted by the target SDAP layer and is forwarded.

When data forwarding is needed, a source RRC initiates a switching request to a target RRC, and the target RRC sends a switching confirmation response to the source RRC after receiving the switching request and simultaneously establishes a data transmission link. And after determining that the data transmission link is established, the source RRC layer sends a reestablishment instruction to the SDAP layer.

After receiving a reestablishment command sent by a source RRC layer, the SDAP layer stops sending data to the source PDCP layer, and determines data needing forwarding according to information in the reestablishment command.

In order to determine the sequence of data transmission, the SDAP layer records SN numbers distributed to the data by a source PDCP layer when determining the data needing forwarding.

And the SDAP layer sequentially sends the data needing forwarding to the target SDAP layer according to the sequence of SN numbers corresponding to the data needing forwarding.

And after the target SDAP layer determines that the data needing forwarding is received, the data needing forwarding is sent to the target PDCP layer.

Specifically, the target SDAP layer sequentially sends the received data to the target PDCP layer according to the SN number sequence corresponding to the data.

The SDAP layer notifies the destination SDAP layer that data to be forwarded has been received completely by sending an end identifier to the destination SDAP layer, and there are various ways for the SDAP layer to send the end identifier to the destination SDAP layer, which are listed as follows:

transmission method 1: the SDAP layer sends an end identifier and the last data in the data needing forwarding to the target SDAP layer;

transmission method 2: and after the SDAP layer sends the last data in the data needing forwarding to the target SDAP layer, the SDAP layer sends an end identifier to the target SDAP layer.

And after receiving the end identifier sent by the SDAP layer, the target SDAP layer sends state information to a target RRC layer.

Wherein, the state information comprises data forwarding success information and/or NG interface switching success information.

Case 2: data forwarding within the SDAP protocol entity:

in the present process of data forwarding, an RRC layer sends a reestablishment instruction to a source PDCP layer, where the source PDCP layer forwards data, and an SDAP layer is introduced in 5G, in the embodiment of the present invention, a method for data forwarding in an SDAP protocol entity is provided, that is, when data forwarding is needed, the RRC layer sends a handover notification to the source PDCP layer, and the source PDCP layer sends a reestablishment instruction to the SDAP layer after receiving the handover notification.

The method specifically relates to an RRC layer, a source PDCP layer, an SDAP layer, and a target PDCP layer, which are respectively described below.

The RRC layer is mainly used for informing the source PDCP layer of switching;

the source PDCP layer is mainly used for receiving a switching notice sent by the RRC layer and sending a reestablishment instruction to the SDAP layer after receiving the notice;

the SDAP layer is mainly used for determining data needing forwarding when reconstruction is carried out; directly transmitting the data needing to be forwarded to the target PDCP layer;

and the target PDCP layer is mainly used for receiving the data which is transmitted by the SDAP layer and is forwarded.

When data forwarding is needed, the RRC layer sends a switching notice to the source PDCP layer after determining that a data transmission link is established.

And after determining that the data is sorted, the source PDCP layer sends a reestablishment instruction to the SDAP.

After receiving the reestablishment command, the SDAP stops sending data to the source PDCP layer, and determines data needing forwarding according to the received information in the reestablishment command.

And the SDAP layer sequentially sends the data needing forwarding to a target PDCP layer according to the sequence of SN numbers corresponding to the data needing forwarding.

In some possible embodiments, aspects of a method for data forwarding provided by the embodiments of the present invention may also be implemented in the form of a program product, which includes program code for causing a computer device to perform the steps in the method for data forwarding according to various exemplary embodiments of the present invention described in this specification when the program code runs on the computer device.

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. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

A program product for data forwarding control according to an embodiment of the present invention may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a server device. However, the program product of the present invention is not limited thereto, and in this document, the readable storage medium may be any tangible medium containing or storing the program, which can be used by or in connection with an information transmission, apparatus, or device.

A readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the periodic network action system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, 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.

As shown in fig. 2, an embodiment of the present invention provides an apparatus for data forwarding, where the apparatus includes: a processor 200 and a memory 201, wherein the memory stores program code that, when executed by the processor, causes the processor to perform the following:

determining data to be forwarded when the SDAP layer is used for reconstruction; and sending the data needing forwarding to a target PDCP layer through the SDAP layer.

Optionally, the processor 200 is specifically configured to:

sending the data to be forwarded to a target SDAP layer through a source SDAP layer; and sending the received data needing forwarding to a lower layer through the target SDAP layer.

Optionally, the processor 200 is further configured to:

sending the ending identifier and the last data in the data needing forwarding to the target PDCP layer through the target SDAP layer by the source SDAP layer; or the like, or, alternatively,

and after the last data in the data needing forwarding is sent to the target PDCP layer through the target SDAP layer through the source SDAP layer, sending an end identifier to the target PDCP layer.

Optionally, the processor 200 is further configured to:

sending state information to a target RRC layer after receiving the ending identifier sent by the source SDAP layer through the target SDAP layer;

Optionally, the processor 200 is specifically configured to:

and sequentially sending the received data to a lower layer through the target SDAP layer according to the SN sequence corresponding to the data.

Optionally, the processor 200 is specifically configured to:

and directly transmitting the data needing forwarding to the target PDCP layer through the SDAP layer.

Optionally, the processor 200 is further configured to:

and after receiving a reestablishment instruction sent by the source PDCP layer through the SDAP layer, determining data needing forwarding.

Optionally, the processor 200 is specifically configured to:

and sequentially sending the received data to a target PDCP layer through the SDAP layer according to the SN sequence corresponding to the data.

An embodiment of the present invention further provides a non-volatile readable storage medium, which includes program code, and when the program code runs on a computing device, the program code is configured to cause the computing device to execute the steps of the method for data forwarding.

In order to implement the functions in the method provided by the embodiment of the present application, the sending device and the receiving device may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

As shown in fig. 3, the method for forwarding data provided in the embodiment of the present invention specifically includes the following steps, where data forwarding between the SDAP protocol entities is selected for introduction:

step 300, the RRC layer reconfigures a data transmission link;

step 301, the RRC layer sends a reestablishment instruction to the SDAP layer;

step 302, after receiving the reestablishment command sent by the RRC layer, the SDAP layer determines data to be forwarded;

step 303, the SDAP sequences the new data and the retransmission data;

and step 304, the SDAP layer sends the data needing forwarding to a target SDAP layer according to the data sequence.

Step 305, after sending the last data in the data to be forwarded to a target SDAP layer, the SDAP layer sends an end identifier to the target SDAP layer;

step 306, the target SDAP layer sends the data to be forwarded to the target PDCP layer according to the data sequence.

Step 307, after receiving the end identifier sent by the SDAP layer, the destination SDAP layer sends state information to the destination RRC layer.

As shown in fig. 4, the method for data forwarding provided in the embodiment of the present invention specifically includes the following steps, where data forwarding in an SDAP protocol entity is selected for introduction:

step 400, the RRC layer reconfigures the data transmission link;

step 401, the RRC layer sends a handover notification to a source PDCP layer;

step 402, after receiving the switch notification, the source PDCP layer sends a reestablishment instruction to the SDAP layer;

step 403, after receiving the reconstruction instruction, the SDAP layer determines data to be forwarded;

step 404, the SDAP layer sequences new data and retransmission data;

step 405, the SDAP layer sends the data to be forwarded to the target PDCP layer according to the data sequence.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of data forwarding, the method comprising:

when the SDAP layer is rebuilt, determining data needing forwarding;

the SDAP layer sends the data needing forwarding to a target packet data convergence protocol PDCP layer;

wherein, the SDAP layer sends the data needing forwarding to the target PDCP layer, and the data sending comprises:

and the SDAP layer directly transmits the data needing forwarding to the target PDCP layer.

2. The method as claimed in claim 1, wherein before the SDAP layer directly transfers the data requiring forwarding to the target PDCP layer, further comprising:

and the SDAP layer determines the data needing to be forwarded after receiving a reestablishment instruction sent by the source PDCP layer.

3. The method as claimed in claim 1, wherein the SDAP layer directly transmitting the data requiring forwarding to the target PDCP layer comprises:

and the SDAP layer sequentially sends the received data to a target PDCP layer according to the SN sequence corresponding to the data.

4. An apparatus for data forwarding, the apparatus comprising: a processor and a memory, wherein the memory stores program code that, when executed by the processor, causes the processor to perform the following:

determining data to be forwarded when the SDAP layer is used for reconstruction; sending the data needing forwarding to a target PDCP layer through the SDAP layer;

5. The device of claim 4, wherein the processor is further to:

6. The device of claim 4, wherein the processor is specifically configured to:

7. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 3.