WO2020087457A1

WO2020087457A1 - Method for transmitting data and terminal

Info

Publication number: WO2020087457A1
Application number: PCT/CN2018/113482
Authority: WO
Inventors: 卢前溪; 尤心
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-11-01
Filing date: 2018-11-01
Publication date: 2020-05-07
Also published as: CN112544104B; CN112544104A

Abstract

Provided in an embodiment of the present invention are a method for transmitting data and a terminal. In the embodiment of the present invention, during an eMBB-based handover process, the terminal may simultaneously separately maintain protocol stacks with a source access network device and with a target access network device and separately correspond to different PDCP entities, i.e. a first PDCP entity and a second PDCP entity, wherein the first PDCP entity of the terminal may be used to perform data transmission with a first PDCP entity of a first access network device or with the first PDCP entity of the first access network device and a second PDCP entity of a second access network device, thereby implementing data transmission in an eMBB-based handover mode.

Description

Data transmission method and terminal

Technical field

The invention relates to wireless communication technology, in particular to a data transmission method and terminal.

Background technique

In the existing handover process, the terminal and the access network device maintain a set of protocol stacks at the same time, and also correspond to only one Packet Data Convergence Protocol (PDCP) entity. The terminal either maintains only the protocol stack with the source access network device and performs data transmission with the source access network device, or only maintains the protocol stack with the target access network device and performs data transmission with the target access network device.

In New Radio (NR) systems such as 5G applications, in order to reduce the handover delay, a new handover method is proposed, based on the enhanced Make-before-break (eMBB) handover method . In such a handover process based on eMBB, the terminal can simultaneously maintain the protocol stacks with the source access network device and the target access network device, respectively, and correspond to different PDCP entities.

Therefore, there is an urgent need to provide a data transmission method to realize data transmission in the eMBB-based switching mode.

Summary of the invention

Various aspects of the present invention provide a data transmission method and terminal for implementing data transmission in an eMBB-based switching mode.

An aspect of the present invention provides a data transmission method, including:

During the handover process, the terminal uses the first PDCP entity of the terminal, the first PDCP entity of the first access network device, or the first PDCP entity of the first access network device and the second The second PDCP entity of the access network device performs data transmission; wherein,

The first PDCP entity of the terminal is one of the two PDCP entities of the terminal;

The first PDCP entity of the terminal and the first PDCP entity of the first access network device correspond to a first protocol stack, and the second PDCP entity of the terminal and the second PDCP entity of the second access network device Corresponding to the second protocol stack.

Another aspect of the present invention provides a terminal, including:

The transmission unit is configured to use the first PDCP entity of the terminal, the first PDCP entity of the first access network device or the first PDCP entity of the first access network device during the handover process and The second PDCP entity of the second access network device performs data transmission; wherein,

It can be seen from the above technical solutions that during the eMBB-based handover process in the embodiment of the present invention, the terminal can simultaneously maintain the protocol stacks with the source access network device and the target access network device, respectively, and correspond to different PDCP entities, namely the first A PDCP entity and a second PDCP entity may use the first PDCP entity of the terminal, the first PDCP entity of the first access network device or the first PDCP entity of the first access network device Performing data transmission with the second PDCP entity of the second access network device, thereby implementing data transmission in an eMBB-based switching mode.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are of the present invention. In some embodiments, for those of ordinary skill in the art, without paying creative labor, other drawings may be obtained based on these drawings.

FIG. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a terminal according to another embodiment of the present invention.

detailed description

To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

In addition, the term "and / or" in this article is just an association relationship that describes the related objects, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists alone, A and B exist at the same time, There are three cases of B alone. In addition, the character "/" in this article generally indicates that the related objects before and after are in an "or" relationship.

FIG. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention, as shown in FIG. 1.

101. During the handover process, the terminal uses the first PDCP entity of the terminal, the first PDCP entity of the first access network device, or the first PDCP entity of the first access network device and the The second PDCP entity of the second access network device performs data transmission.

among them,

It should be noted that the access network equipment involved in the present invention may be an evolved base station (Evolved) in the Evolved Universal Mobile Communication System Terrestrial Radio Access Network (Evolved Universal Mobile Telecommunication System Territorial Access Network, E-UTRAN) NodeB, eNB), or may also be a 5G base station in the next generation radio access network (Next-Generation-Radio Access Network, NG-RAN), that is, gNB, etc., which is not particularly limited in this embodiment.

The core network device involved in the present invention may be a mobility management device, and may specifically be an access and mobility management function (Access and Mobility Management) in a 5G core network, that is, Next Generation Core (NGCN) Function (AMF), or may also be a 4G core network (evolved packet core (Evolved Packet Core, EPC) mobility management entity (MobilityManagementEntity, MME), etc., this embodiment is not particularly limited.

The core idea of the present invention is that during the handover process based on eMBB, the terminal can simultaneously maintain the protocol stack with the source access network device and the target access network device, respectively, and correspond to different PDCP entities, namely the first PDCP entity. And the second PDCP entity, by using the first PDCP entity of the terminal, with the first PDCP entity of the first access network device or with the first PDCP entity of the first access network device and the The second PDCP entity of the second access network device performs data transmission, thereby implementing data transmission in the eMBB-based switching mode.

It should be noted that this embodiment can be applied to device switching between radio access networks of the same type, for example, in NG-RAN, switching from one gNB to another gNB, or, for example, in E-UTRAN , Handover from one eNB to another, or can also be applied to network handover between different types of radio access networks, for example, network handover from NG-RAN to E-UTRAN, or, for example, from E-UTRAN The network handover to the NG-RAN is not particularly limited in this embodiment.

Optionally, in a possible implementation manner of this embodiment, the first access network device may be a source access network device, and the second access network device may be a target access network device, or all The first access network device may be a target access network device, and the second access network device may be a source access network device, which is not particularly limited in this embodiment.

Optionally, in a possible implementation manner of this embodiment, in 101, the first PDCP entity of the terminal used by the terminal may be the terminal according to the first access network device or the second access The instruction of the network device is determined, or may be determined by the terminal according to the pre-configured configuration information, which is not particularly limited in this embodiment.

In the present invention, the terminal can simultaneously maintain the protocol stack with the first access network device, that is, the first protocol stack, and the protocol stack with the second access network device, that is, the second protocol stack, and respectively correspond to different PDCP entities That is, the first PDCP entity and the second PDCP entity.

During the handover process, in the first data transmission mode, the terminal may specifically use one of the two PDCP entities of the terminal, that is, the first PDCP entity, to communicate with the first PDCP entity of the first access network device Data transmission; In the second data transmission method, the terminal may specifically use one of the two PDCP entities of the terminal, namely the first PDCP entity, and the first PDCP entity of the first access network device and the The second PDCP entity of the second access network device performs data transmission.

In the first data transmission method, the following transmission methods can be adopted for the transmission of downlink data. Among them, it involves the header compression processing and decompression processing of the downstream data.

The so-called header compression processing may be Robust Header Compression (ROHC) processing or other header compression processing, which is not particularly limited in this embodiment.

The so-called decompression process may be the decompression process corresponding to the ROHC process, or may also be the decompression process corresponding to the other header compression processes, as long as it corresponds to the adopted header compression process in one-to-one correspondence. This is not particularly limited.

Transmission mode A: The terminal may specifically use the first PDCP entity of the terminal to decompress the first downlink data packet sent by the first access network device. The first downlink data packet may be obtained by performing header compression processing on the first downlink data for the first PDCP entity of the first access network device.

Preferably, at this time, the first access network device may be a source access network device, and the second access network device may be a target access network device.

Transmission mode B: The terminal may specifically use the first PDCP entity of the terminal to decompress the second downlink data packet sent by the second access network device. The second downlink data packet may be obtained by the first PDCP entity of the first access network device performing header compression processing on the second downlink data and sent to the second access network device.

Transmission mode C: Combine transmission mode A and transmission mode B to realize the transmission of downlink data.

Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the terminal may specifically send first uplink feedback information to the first access network device, the first The uplink feedback information may include uplink feedback information of the first downlink data packet and / or uplink feedback information of the second downlink data packet.

The first uplink feedback information may be a distributed robust header compression feedback control protocol data unit (Control PDU for interspersed ROHC feedback), or may be other compressed feedback control protocol data units. There is no particular limitation.

Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the terminal may specifically send second uplink feedback information to the second access network device, the second The uplink feedback information includes uplink feedback information of the first downlink data packet and / or uplink feedback information of the second downlink data packet for the second access network device to send the second uplink feedback information To the first access network device.

The second upstream feedback information may be a distributed robust header compression feedback control protocol data unit (Control PDU for interspersed ROHC feedback), or may be other compression feedback control protocol data units. There is no particular limitation.

Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the terminal may specifically use a combination of the technical solutions in the foregoing two implementation manners to transmit the first uplink feedback information and The second uplink feedback information.

In the first data transmission method, the following transmission method can be used for the transmission of uplink data. Among them, it involves header compression processing and decompression processing of upstream data.

The so-called decompression process may be the decompression process corresponding to the ROHC process, or may also be the decompression process corresponding to the other header compression processes, as long as it corresponds to the adopted header compression process in one-to-one correspondence, this embodiment This is not particularly limited.

Transmission mode D: The terminal may specifically use the first PDCP entity of the terminal to perform header compression processing on the first uplink data to obtain a first uplink data packet, and send the first uplink data packet to the first access network device. A first uplink data packet, for the first access network device to use the first PDCP entity of the first access network device to decompress the first uplink data packet.

Preferably, at this time, the first access network device may be a target access network device, and the second access network device may be a source access network device.

Transmission mode E: The terminal may specifically use the first PDCP entity of the terminal to perform header compression processing on the second uplink data to obtain a second uplink data packet, and send the second uplink data packet to the second access network device A second uplink data packet, and is sent by the second access network device to the first access network device for the first access network device to use the first PDCP of the first access network device The entity decompresses the second uplink data packet.

Transmission mode F: Combine transmission mode D and transmission mode E to realize the transmission of downlink data. At this time, after receiving the first upstream data packet and the second upstream data packet, the first network device may further perform merge processing on them, and then, after the aggregation processing The first uplink data packet and the second uplink data packet are decompressed.

Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the terminal may specifically receive the first downlink feedback information sent by the first access network device. The first downlink feedback information may include downlink feedback information of the first uplink data packet and / or downlink feedback information of the second uplink data packet, and the first downlink feedback information may be the first access Generated by the network device, or may also be generated for the second access network device and sent to the first access network device.

The first downlink feedback information may be a distributed control protocol data unit of robust header compression feedback (Control PDU for interspersed ROHC feedback), or may be other control protocol data unit of compressed feedback. This is not particularly limited.

Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the terminal may specifically receive second downlink feedback information sent by the second access access network device. The second downlink feedback information may include downlink feedback information of the first uplink data packet and / or downlink feedback information of the second uplink data packet, and the second downlink feedback information may be the second access network Generated by the device, or may also be generated for the first access network device and sent to the second access network device.

The second downlink feedback information may be a distributed robust header compression feedback control protocol data unit (Control PDU for interspersed ROHC feedback), or may be other compression feedback control protocol data units. There is no particular limitation.

Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the terminal may specifically use a combination of technical solutions in the foregoing two implementation manners to transmit the first downlink feedback information And second downlink feedback information.

In the first data transmission mode, after the first access network device decompresses the first uplink data packet and / or the second uplink data packet, the first access network device may directly Sending the first uplink data packet and / or the second uplink data packet after decompression processing to the core network device, or the first access network device may also send the core network device to the core network device through the second access network device Sending the first uplink data packet and / or the second uplink data packet after decompression processing, that is, the first access network device may send decompression processing to the second access network device The subsequent first uplink data packet and / or the second uplink data packet for the second access network device to send the first uplink data packet and the first uplink data packet after decompression processing to the core network device / Or the second uplink data packet, or the first access network device may also combine the foregoing two methods to decompress the first uplink data packet and / or the second uplink data packet after decompression processing Send to the core network equipment, the real This embodiment is not particularly limited.

Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the first access network device may further receive header compression processing sent by the second access network device Or the first compressed information of the decompression process, as the compressed information used by the first access network device to perform the header compression process or the decompression process.

In this implementation, the first compressed information may include but is not limited to at least one of the following information:

Context (context), profile ID (profile), sliding window (sliding window), translation table (translation), flag (flag), and field (field).

In this implementation manner, the first compressed information in the header compression processing or decompression processing may be transmitted using a resource block as a transmission unit, or may be transmitted using other resource units as a transmission unit, which is not performed in this embodiment Specially limited.

In a specific implementation process, the first compression information of the header compression processing or decompression processing may be specifically carried in the handover request or may also be carried in the handover command, which is not particularly limited in this embodiment.

In this implementation manner, the terminal may further reset the first compressed information. Correspondingly, the first access network device also needs to reset the first compressed information to ensure synchronization between the terminal and the network side.

For example, if the first condition is satisfied, the terminal resets the first compressed information of the downlink data; the first condition may include but is not limited to at least one of the following cases:

Receive the switch command;

Start to receive a data packet with a specific Sequence Number (SN) of x;

Start of receiving a data packet with an end-marker indication;

Receive specific indication information in the protocol data unit (Protocol Data Unit, PDU) header of the PDCP entity;

Receive the instruction message of path conversion completion;

When the protocol stack corresponding to the source access network device is released; and

When there is no more data transmission with the source access network device.

Or, for another example, if the second condition is satisfied, the terminal resets the first compression information of the uplink data; the second condition may include but is not limited to at least one of the following cases:

Receive the switch command;

When sending a handover complete message;

After sending the handover complete message;

Start sending a specific data packet with SN x;

Start sending data packets with End-marker indication;

Send specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

Release the protocol stack corresponding to the source access network device; and

There is no longer data transmission with the source access network equipment.

In a specific implementation process, the first compression information of the header compression process or the decompression process may be specifically transmitted after the path switching process.

In the second data transmission method, the following transmission methods can be adopted for the transmission of downlink data. Among them, it involves the header compression processing and decompression processing of the downstream data.

Transmission mode A ′: The terminal may specifically use the first PDCP entity of the terminal to decompress the third downlink data packet sent by the first access network device; wherein, the third downlink data packet It may be obtained by performing header compression processing on the third downlink data for the first PDCP entity of the first access network device, or may also perform header on the third downlink data for the second PDCP entity of the second access network device The compression process obtains and sends to the first access network device.

Transmission mode B ′: The terminal uses the first PDCP entity of the terminal to decompress the fourth downlink data packet sent by the second access network device; wherein, the fourth downlink data packet may be The first PDCP entity of the first access network device performs header compression processing on the fourth downlink data and sends it to the second access network device, or may also be the second of the second access network device The PDCP entity performs header compression processing on the fourth downlink data to obtain it.

Transmission mode C ': Combine transmission mode A' and transmission mode B 'to realize the transmission of downlink data.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the terminal may specifically send third uplink feedback information to the first access network device, the third The uplink feedback information may include uplink feedback information of the third downlink data packet and / or uplink feedback information of the fourth downlink data packet.

The third upstream feedback information may be a distributed robust header compression feedback control protocol data unit (Control PDU for interspersed ROHC feedback), or may be other compression feedback control protocol data units. There is no particular limitation.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the terminal may specifically send fourth uplink feedback information to the second access network device, the fourth The uplink feedback information may include uplink feedback information of the third downlink data packet and / or uplink feedback information of the fourth downlink data packet.

The fourth uplink feedback information may be a distributed robust header compression feedback control protocol data unit (Control PDU for interspersed ROHC feedback), or may be other compression feedback control protocol data units. There is no particular limitation.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the terminal may specifically use a combination of the technical solutions in the foregoing two implementation manners to transmit the third uplink feedback information and Fourth uplink feedback information.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the first access network device may further transmit the third with the second access network device Uplink feedback information and / or the fourth uplink feedback information.

In the second data transmission method, the following transmission method can be used for the transmission of uplink data. Among them, it involves header compression processing and decompression processing of upstream data.

Transmission method D ′: The terminal may specifically use the first PDCP entity of the terminal to perform header compression processing on the third uplink data to obtain a third uplink data packet, and send the first uplink network device to the first access network device. The third uplink data packet for the first access network device to use the first PDCP entity of the first access network device to decompress the third uplink data packet, or the first The access network device sends the third uplink data packet to the second access network device, and the second access network device uses the second PDCP entity of the second access network device to The third upstream data packet is decompressed

Transmission method E ′: The terminal may specifically use the first PDCP entity of the terminal to perform header compression processing on the fourth uplink data to obtain a fourth uplink data packet, and send the second uplink network device The fourth uplink data packet, for the second access network device to use the second PDCP entity of the second access network device to decompress the fourth uplink data packet, or the second The access network device sends the fourth uplink data packet to the first access network device, and the first access network device uses the first PDCP entity of the first access network device to The fourth upstream data packet is decompressed

Transmission mode F ': combine transmission mode D' and transmission mode E 'to realize the transmission of downlink data. At this time, after receiving the third upstream data packet and the fourth upstream data packet, the first network device may further perform merge processing on them, and then, after the aggregation processing The third uplink data packet and the fourth uplink data packet are decompressed.

Transmission mode G ': Combine transmission mode D' and transmission mode E 'to realize the transmission of downlink data. At this time, the first network device performs decompression processing after receiving the third uplink data packet, and the second network device performs decompression processing after receiving the fourth uplink data packet, and then the The first network device or the second network device performs merge processing on them.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the terminal may specifically receive third downlink feedback information sent by the first access network device, and the first The three downlink feedback information may include downlink feedback information of the third uplink data packet and / or downlink feedback information of the fourth uplink data packet, and the third downlink feedback information may be generated for the first access network device Or, it may be generated for the second access network device and sent to the first access network device.

The third downlink feedback information may be a distributed control protocol data unit for robust header compression feedback (Control PDU for interspersed ROHC feedback), or may be another control protocol data unit for compressed feedback. In this embodiment, There is no particular limitation.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the terminal may specifically receive fourth downlink feedback information sent by the second access access network device. The fourth downlink feedback information may include downlink feedback information of the third uplink data packet and / or downlink feedback information of the fourth uplink data packet, and the fourth downlink feedback information may be the second access network Generated by the device, or may also be generated for the first access network device and sent to the second access network device.

The fourth downlink feedback information may be a distributed robust header compression feedback control protocol data unit (Control PDU for interspersed ROHC feedback), or may be other compression feedback control protocol data units. There is no particular limitation.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the terminal may specifically use a combination of the technical solutions in the foregoing two implementation manners to transmit the third downlink feedback information and Fourth downlink feedback information.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the first uplink network device sends the third uplink data packet and / or the fourth uplink data packet After decompression processing, the first access network device may directly send the third uplink data packet and / or the fourth uplink data packet after decompression processing to the core network device, or the first access The network access device may also send the third uplink data packet and / or the fourth uplink data packet after decompression processing to the core network device through the second access network device, that is, the first access The network device may send the third uplink data packet and / or the fourth uplink data packet after decompression processing to the second access network device for the second access network device to send to the core The network device sends the third uplink data packet and / or the fourth uplink data packet after decompression processing, or the first access network device may also combine the foregoing two methods to Describe the third upstream packet and / The fourth uplink data packet to the core network apparatus, the present embodiment is not particularly limited to this embodiment.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the third uplink data packet and / or the fourth uplink data packet are sent by the second access network device to After decompression processing, the second access network device may directly send the third uplink data packet and / or the fourth uplink data packet after decompression processing to the core network device, or the second The network access device may also send the third uplink data packet and / or the fourth uplink data packet after decompression processing to the core network device through the first access network device, that is, the second access The network device may send the third uplink data packet and / or the fourth uplink data packet after decompression processing to the first access network device for the first access network device to send to the core The network device sends the third uplink data packet and / or the fourth uplink data packet after decompression processing, or the second access network device may also combine the foregoing two methods to Describe the third upstream packet and / The fourth uplink data packet to the core network apparatus, the present embodiment is not particularly limited to this embodiment.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the first access network device and the second access network device may specifically use the above two implementation methods. In combination with the technical solutions, the third uplink data packet and / or the fourth uplink data packet after decompression processing are sent to the core network device.

For example, the first access network device and the second network device may respectively send the third uplink data packet and / or the fourth uplink data packet after decompression processing to the core network device.

Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the first access network device may further transmit the header compression with the second access network device The second compressed information processed or decompressed is used as the compressed information used by the first access network device and the second access network device to perform header compression processing or decompression processing.

In this implementation manner, the second compressed information may include but is not limited to at least one of the following information:

In this implementation manner, the second compressed information in the header compression processing or decompression processing may be transmitted in a resource block as a transmission unit, or may be transmitted in another resource unit as a transmission unit, which is not performed in this embodiment Specially limited.

In a specific implementation process, the second compression information of the header compression processing or the decompression processing may be carried in a handover request or may also be carried in a handover command, which is not particularly limited in this embodiment.

For example, when the source access network device receives the handover command, the source access network device sends the second compression information of the header compression processing or decompression processing to the target access network device. Then, before the source access network device releases the corresponding protocol stack, periodic interaction is performed between the source access network device and the target access network device, or the source access network device triggers the interaction .

In this implementation manner, the terminal may further reset the second compressed information. Correspondingly, the first access network device and the second access network device also need to reset the second compressed information to ensure synchronization between the terminal and the network side and the network side.

For example, if the third condition is satisfied, the terminal resets the second compressed information of the downlink data; the third condition may include but is not limited to at least one of the following cases:

Receive the switch command;

Start to receive a data packet with a specific Sequence Number (SN) of x;

Start of receiving a data packet with an end-marker indication;

Receive the instruction message of path conversion completion;

When there is no more data transmission with the source access network device.

Or, for another example, if the fourth condition is satisfied, the terminal resets the second compressed information of the uplink data; the fourth condition may include but is not limited to at least one of the following cases:

Receive the switch command;

When sending a handover complete message;

After sending the handover complete message;

Start sending a specific data packet with SN x;

Start sending data packets with End-marker indication;

Send specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

There is no longer data transmission with the source access network equipment.

In a specific implementation process, the second compression information of the header compression process or the decompression process may be specifically transmitted after the path switching process.

In this embodiment, during the handover process based on eMBB, the terminal can simultaneously maintain the protocol stack with the source access network device and the target access network device, and correspond to different PDCP entities, namely the first PDCP entity and the third Two PDCP entities, by using the first PDCP entity of the terminal, with the first PDCP entity of the first access network device or with the first PDCP entity of the first access network device and the second The second PDCP entity of the access network device performs data transmission, thereby implementing data transmission in the eMBB-based switching mode.

It should be noted that, for the sake of simple description, the foregoing method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the sequence of actions described. Because according to the invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the description of each embodiment has its own emphasis. For a part that is not detailed in an embodiment, you can refer to related descriptions in other embodiments.

FIG. 2 is a schematic structural diagram of a terminal according to another embodiment of the present invention, as shown in FIG. 2. The terminal in this embodiment may include a transmission unit 21, which may be used during the handover process to use the first PDCP entity of the terminal to communicate with the first PDCP entity of the first access network device or to the first The first PDCP entity of the network access device and the second PDCP entity of the second access network device perform data transmission.

Wherein, the first PDCP entity of the terminal is one of the two PDCP entities of the terminal; the first PDCP entity of the terminal and the first PDCP entity of the first access network device correspond to the first Protocol stack, the second PDCP entity of the terminal and the second PDCP entity of the second access network device correspond to the second protocol stack.

Optionally, in a possible implementation manner of this embodiment, the first PDCP entity of the terminal utilized by the transmission unit 21 may be the transmission unit 21 according to the first access network device or the second access network device Is determined, or may be determined according to pre-configured configuration information, which is not particularly limited in this embodiment.

In the present invention, the terminal can simultaneously maintain the protocol stack with the first access network device, namely the first protocol stack, and the protocol stack with the second access network device, namely the second protocol stack, and correspond to different PDCP entities, respectively That is, the first PDCP entity and the second PDCP entity.

Optionally, in a possible implementation manner of this embodiment, the transmission unit 21 may specifically be used

Use the first PDCP entity of the terminal to decompress the first downlink data packet sent by the first access network device; wherein, the first downlink data packet is the first access network The first PDCP entity of the device obtains header compression processing on the first downlink data; and / or

Use the first PDCP entity of the terminal to decompress the second downlink data packet sent by the second access network device; wherein, the second downlink data packet is of the first access network device The first PDCP entity performs header compression processing on the second downlink data to obtain and send it to the second access network device.

In this implementation, the transmission unit 21 may be further used

Sending first uplink feedback information to the first access network device, where the first uplink feedback information includes uplink feedback information of the first downlink data packet and / or uplink feedback information of the second downlink data packet ;and / or

Sending second uplink feedback information to the second access network device, where the second uplink feedback information includes uplink feedback information of the first downlink data packet and / or uplink feedback information of the second downlink data packet For the second access network device to send the second uplink feedback information to the first access network device.

Use the first PDCP entity of the terminal to perform header compression processing on the first uplink data to obtain a first uplink data packet, and send the first uplink data packet to the first access network device for The first access network device uses the first PDCP entity of the first access network device to decompress the first uplink data packet; and / or

Use the first PDCP entity of the terminal to perform header compression processing on the second uplink data to obtain a second uplink data packet, and send the second uplink data packet to the second access network device. The second access network device sends to the first access network device for the first access network device to use the first PDCP entity of the first access network device for the second uplink data The package is decompressed.

In this implementation, the transmission unit 21 may be further used

Receiving first downlink feedback information sent by the first access network device, where the first downlink feedback information includes downlink feedback information of the first uplink data packet and / or downlink of the second uplink data packet Feedback information, the first downlink feedback information is generated for the first access network device, or generated for the second access network device and sent to the first access network device; and / or

Receiving second downlink feedback information sent by the second access access network device, where the second downlink feedback information includes downlink feedback information of the first uplink data packet and / or downlink of the second uplink data packet For feedback information, the second downlink feedback information is generated for the second access network device, or generated for the first access network device and sent to the second access network device.

In this implementation manner, the transmission unit 21 may be further used for the first uplink data packet and / or the second uplink data packet after the decompression process may be used by the first access network The device is sent to the core network device, or may be sent by the first access network device to the second access network device, and sent by the second access network device to the core network device, or It can be sent to the core network device by combining the above two methods, which is not particularly limited in this embodiment.

In this implementation manner, the first compression information of the header compression processing or decompression processing may be sent by the second access network device to the first access network device.

In a specific implementation process, the first compression information of the header compression process or the decompression process may be carried in a handover request, or may also be carried in a handover command, which is not particularly limited in this embodiment.

In this implementation manner, the transmission unit 21 may be further configured to reset the first compression information of the header compression processing or decompression processing. Correspondingly, the first access network device also needs to reset the first compressed information to ensure synchronization between the terminal and the network side.

For example, the transmission unit 21 can be specifically used for

If the first condition is satisfied, the first compressed information of the downlink data is reset; the first condition includes at least one of the following:

Receive the switch command;

Start receiving a specific data packet with SN x;

Start of receiving data packet with End-marker instruction;

Receive specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

When there is no more data transmission with the source access network device.

Or, for another example, the transmission unit 21 may specifically be used

If the second condition is satisfied, the terminal resets the first compressed information of the uplink data; the second condition includes at least one of the following:

Receive the switch command;

When sending a handover complete message;

After sending the handover complete message;

Start sending a specific data packet with SN x;

Start sending data packets with End-marker indication;

Send specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

There is no longer data transmission with the source access network equipment.

Use the first PDCP entity of the terminal to decompress the third downlink data packet sent by the first access network device; wherein, the third downlink data packet is the data of the first access network device The first PDCP entity performs header compression processing on the third downlink data, or performs header compression processing on the third downlink data for the second PDCP entity of the second access network device, and sends it to the first access network Equipment; and / or

Use the first PDCP entity of the terminal to decompress the fourth downlink data packet sent by the second access network device; wherein, the fourth downlink data packet is of the first access network device The first PDCP entity performs header compression processing on the fourth downlink data and sends it to the second access network device, or performs header compression processing on the fourth downlink data for the second PDCP entity of the second access network device obtain.

In this implementation, the transmission unit 21 may be further used

Sending third uplink feedback information to the first access network device, where the third uplink feedback information includes uplink feedback information of the third downlink data packet and / or uplink feedback information of the fourth downlink data packet; and / or

Sending fourth uplink feedback information to the second access network device, where the fourth uplink feedback information includes uplink feedback information of the third downlink data packet and / or uplink feedback information of the fourth downlink data packet.

Specifically, the third uplink feedback information and / or the fourth uplink feedback information may be specifically transmitted between the first access network device and the second access network device.

Use the first PDCP entity of the terminal to perform header compression processing on the third uplink data to obtain a third uplink data packet, and send the third uplink data packet to the first access network device for The first access network device uses the first PDCP entity of the first access network device to decompress the third uplink data packet, or the first access network device transfers the third uplink data packet The data packet is sent to the second access network device, and the second access network device uses the second PDCP entity of the second access network device to decompress the third uplink data packet; and / or

Use the first PDCP entity of the terminal to perform header compression processing on the fourth uplink data to obtain a fourth uplink data packet, and send the fourth uplink data packet to the second access network device for The second access network device uses the second PDCP entity of the second access network device to decompress the fourth uplink data packet, or the second access network device transfers the fourth uplink data packet The data packet is sent to the first access network device, and the first access network device uses the first PDCP entity of the first access network device to decompress the fourth uplink data packet.

In this implementation, the transmission unit 21 may be further used

Receiving third downlink feedback information sent by the first access network device, where the third downlink feedback information includes downlink feedback information of the third uplink data packet and / or downlink feedback information of the fourth uplink data packet , The third downlink feedback information is generated for the first access network device, or generated for the second access network device and sent to the first access network device; and / or

Receiving fourth downlink feedback information sent by the second access access network device, where the fourth downlink feedback information includes downlink feedback information of the third uplink data packet and / or downlink of the fourth uplink data packet For feedback information, the fourth downlink feedback information is generated for the second access network device, or generated for the first access network device and sent to the second access network device.

In this implementation manner, the third uplink data packet and / or the fourth uplink data packet after the decompression process may be sent by the first access network device to the core network device, or sent to the The second access network device is sent by the second access network device to the core network device, or may be sent by the second access network device to the core network device, or sent to the The first access network device is sent by the first access network device to the core network device, or may also be sent to the core network device in the above two manners, which is not particularly limited in this embodiment.

In this implementation manner, the second compressed information of the header compression processing or decompression processing may be transmitted between the first access network device and the second access network device.

In this implementation manner, the transmission unit 21 may further be used to reset the second compression information of the header compression processing or decompression processing. Correspondingly, the first access network device and the second access network device also need to reset the second compressed information to ensure synchronization between the terminal and the network side.

For example, the transmission unit 21 can be specifically used for

If the first condition is satisfied, the terminal resets the second compressed information of the downlink data; the first condition includes at least one of the following:

Receive the switch command;

Start receiving a specific data packet with SN x;

Start of receiving data packet with End-marker instruction;

Receive specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

When there is no more data transmission with the source access network device.

Or, for another example, the transmission unit 21 may specifically be used

If the second condition is satisfied, the second compression information of the upstream data is reset; the second condition includes at least one of the following conditions:

Receive the switch command;

When sending a handover complete message;

After sending the handover complete message;

Start sending a specific data packet with SN x;

Start sending data packets with End-marker indication;

Send specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

There is no longer data transmission with the source access network equipment.

It should be noted that the functions of the terminal in the embodiment corresponding to FIG. 1 may be implemented by the terminal provided in this embodiment. For a detailed description, please refer to the relevant content in the embodiment corresponding to FIG. 1, which will not be repeated here.

In this embodiment, during the handover process based on eMBB, the terminal can simultaneously maintain the protocol stack with the source access network device and the target access network device, respectively, and correspond to different PDCP entities, namely the first PDCP entity and the first Two PDCP entities may use the first PDCP entity of the terminal through the transmission unit, the first PDCP entity of the first access network device or the first PDCP entity of the first access network device and the The second PDCP entity of the second access network device performs data transmission, thereby implementing data transmission in the eMBB-based switching mode.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided by the present invention, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined Or it can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A data transmission method, which includes:

During the handover process, the terminal uses the first PDCP entity of the terminal, the first PDCP entity of the first access network device, or the first PDCP entity of the first access network device and the second The second PDCP entity of the access network device performs data transmission; wherein,

The first PDCP entity of the terminal is one of the two PDCP entities of the terminal;

The first PDCP entity of the terminal and the first PDCP entity of the first access network device correspond to a first protocol stack, and the second PDCP entity of the terminal and the second PDCP entity of the second access network device Corresponding to the second protocol stack.
The method according to claim 1, wherein the first access network device is a source access network device, and the second access network device is a target access network device; or the first access The network device is a target access network device, and the second access network device is a source access network device.
The method according to claim 1, wherein the terminal uses the first PDCP entity of the terminal to perform data transmission with the first PDCP entity of the first access network device, including:

The terminal uses the first PDCP entity of the terminal to decompress the first downlink data packet sent by the first access network device; wherein, the first downlink data packet is the first The first PDCP entity of the access network device performs header compression processing on the first downlink data to obtain; and / or

The terminal uses the first PDCP entity of the terminal to decompress the second downlink data packet sent by the second access network device; wherein the second downlink data packet is the first access The first PDCP entity of the network device performs header compression processing on the second downlink data and sends it to the second access network device.
The method according to claim 3, wherein the terminal uses the first PDCP entity of the terminal to perform data transmission with the first PDCP entity of the first access network device, further comprising:

The terminal sends first uplink feedback information to the first access network device, where the first uplink feedback information includes uplink feedback information of the first downlink data packet and / or of the second downlink data packet Upstream feedback information; and / or

The terminal sends second uplink feedback information to the second access network device, where the second uplink feedback information includes uplink feedback information of the first downlink data packet and / or of the second downlink data packet Uplink feedback information for the second access network device to send the second uplink feedback information to the first access network device.
The method according to claim 1, wherein the terminal uses the first PDCP entity of the terminal to perform data transmission with the first PDCP entity of the first access network device, including:

The terminal uses the first PDCP entity of the terminal to perform header compression processing on the first uplink data to obtain a first uplink data packet, and sends the first uplink data packet to the first access network device, For the first access network device to use the first PDCP entity of the first access network device to decompress the first uplink data packet; and / or

The terminal uses the first PDCP entity of the terminal to perform header compression processing on the second uplink data to obtain a second uplink data packet, and sends the second uplink data packet to the second access network device, And sent by the second access network device to the first access network device, so that the first access network device uses the first PDCP entity of the first access network device to Two upstream data packets are decompressed.
The method according to claim 5, wherein the terminal uses the first PDCP entity of the terminal to perform data transmission with the first PDCP entity of the first access network device, further comprising:

The terminal receives first downlink feedback information sent by the first access network device, where the first downlink feedback information includes downlink feedback information of the first uplink data packet and / or the second uplink data Downlink feedback information of the packet, the first downlink feedback information is generated for the first access network device, or generated for the second access network device and sent to the first access network device; or

The terminal receives second downlink feedback information sent by the second access access network device, where the second downlink feedback information includes downlink feedback information of the first uplink data packet and / or the second uplink data Downlink feedback information of the packet, the second downlink feedback information is generated for the second access network device, or generated for the first access network device and sent to the second access network device.
The method according to claim 5, wherein after the terminal uses the first PDCP entity of the terminal to perform data transmission with the first PDCP entity of the first access network device, the method further comprises:

The first access network device sends the first uplink data packet and / or the second uplink data packet after decompression processing to the core network device; or

The first access network device sends the first uplink data packet and / or the second uplink data packet after decompression processing to the second access network device for the second access network The device sends the first uplink data packet and / or the second uplink data packet after decompression processing to the core network device.
The method according to any one of claims 3 to 7, wherein the terminal uses the first PDCP entity of the terminal to perform data transmission with the first PDCP entity of the first access network device, Also includes:

The first access network device receives first compression information sent by the second access network device in header compression processing or decompression processing.
The method according to claim 8, wherein the first compression information of the header compression process or the decompression process is transmitted in resource block units.
The method according to claim 8, wherein the first compression information of the header compression processing or decompression processing is carried in a handover request or a handover command.
The method according to any one of claims 3 to 7, wherein the terminal uses the first PDCP entity of the terminal to perform data transmission with the first PDCP entity of the first access network device, Also includes:

The terminal resets the first compressed information.
The method according to claim 11, wherein the resetting of the first compressed information by the terminal comprises:

If the first condition is satisfied, the terminal resets the first compressed information of the downlink data; the first condition includes at least one of the following:

Receive the switch command;

Start receiving a specific data packet with SN x;

Start of receiving data packet with End-marker instruction;

Receive specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

When the protocol stack corresponding to the source access network device is released; and

When there is no more data transmission with the source access network equipment;

If the second condition is satisfied, the terminal resets the first compressed information of the uplink data; the second condition includes at least one of the following:

Receive the switch command;

When sending a handover complete message;

After sending the handover complete message;

Start sending a specific data packet with SN x;

Start sending data packets with End-marker indication;

Send specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

Release the protocol stack corresponding to the source access network device; and

There is no longer data transmission with the source access network equipment.
The method according to claim 8, wherein the first compression information of the header compression processing or decompression processing is transmitted after the path conversion process.
The method according to claim 1, wherein the terminal utilizes the first PDCP entity of the terminal to communicate with the first PDCP entity of the first access network device and the second access network device. The second PDCP entity performs data transmission, including:

The terminal uses the first PDCP entity of the terminal to decompress the third downlink data packet sent by the first access network device; wherein the third downlink data packet is the first access The first PDCP entity of the network device performs header compression processing on the third downlink data, or performs header compression processing on the third downlink data for the second PDCP entity of the second access network device to obtain and send to the first Access network equipment; and / or

The terminal uses the first PDCP entity of the terminal to decompress the fourth downlink data packet sent by the second access network device; wherein the fourth downlink data packet is the first access The first PDCP entity of the network device performs header compression processing on the fourth downlink data and sends it to the second access network device, or performs the fourth downlink data on the second PDCP entity of the second access network device Header compression processing is obtained.
The method according to claim 14, wherein the terminal utilizes the first PDCP entity of the terminal to communicate with the first PDCP entity of the first access network device and the second access network device. The second PDCP entity performs data transmission, and further includes:

The terminal sends third uplink feedback information to the first access network device, where the third uplink feedback information includes uplink feedback information of the third downlink data packet and / or uplink of the fourth downlink data packet Feedback information; and / or

The terminal sends fourth uplink feedback information to the second access network device, where the fourth uplink feedback information includes uplink feedback information of the third downlink data packet and / or uplink of the fourth downlink data packet Feedback.
The method according to claim 15, wherein the terminal utilizes the first PDCP entity of the terminal to communicate with the first PDCP entity of the first access network device and the second access network device. The second PDCP entity performs data transmission, and further includes:

The first access network device and the second access network device transmit the third uplink feedback information and / or the fourth uplink feedback information.
The method according to claim 1, wherein the terminal utilizes the first PDCP entity of the terminal to communicate with the first PDCP entity of the first access network device and the second access network device. The second PDCP entity performs data transmission, including:

The terminal uses the first PDCP entity of the terminal to perform header compression processing on the third uplink data to obtain a third uplink data packet, and sends the third uplink data packet to the first access network device, For the first access network device to use the first PDCP entity of the first access network device to decompress the third uplink data packet, or the first access network device The third uplink data packet is sent to the second access network device, and the second access network device uses the second PDCP entity of the second access network device to decipher the third uplink data packet. Compression processing; and / or

The terminal uses the first PDCP entity of the terminal to perform header compression processing on the fourth uplink data to obtain a fourth uplink data packet, and sends the fourth uplink data packet to the second access network device, For the second access network device to use the second PDCP entity of the second access network device to decompress the fourth uplink data packet, or the second access network device The fourth uplink data packet is sent to the first access network device, and the first access network device uses the first PDCP entity of the first access network device to decipher the fourth uplink data packet. Compression processing.
The method according to claim 17, wherein the terminal utilizes the first PDCP entity of the terminal to communicate with the first PDCP entity of the first access network device and the second access network device. The second PDCP entity performs data transmission, and further includes:

The terminal receives third downlink feedback information sent by the first access network device, where the third downlink feedback information includes downlink feedback information of the third uplink data packet and / or of the fourth uplink data packet Downlink feedback information, the third downlink feedback information is generated for the first access network device, or generated for the second access network device and sent to the first access network device; and / or

The terminal receives fourth downlink feedback information sent by the second access access network device, where the fourth downlink feedback information includes downlink feedback information of the third uplink data packet and / or the fourth uplink data Downlink feedback information of the packet, the fourth downlink feedback information is generated for the second access network device, or generated for the first access network device and sent to the second access network device.
The method according to claim 17, wherein the terminal utilizes the first PDCP entity of the terminal to communicate with the first PDCP entity of the first access network device and the second access network device. After the second PDCP entity performs data transmission, it also includes:

The first access network device sends the third uplink data packet and / or the fourth uplink data packet after the decompression process to the core network device, or sends the decompression process to the second access network device The subsequent third uplink data packet and / or the fourth uplink data packet for the second access network device to send the third uplink data packet and the third uplink data packet after decompression processing to the core network device / Or the fourth uplink data packet; and / or

The second access network device sends the third uplink data packet and / or the fourth uplink data packet after decompression processing to the core network device, or sends a decode to the first access network device The third uplink data packet and / or the fourth uplink data packet after compression processing, for the first access network device to send the third uplink data after decompression processing to the core network device Packet and / or the fourth uplink data packet.
The method according to any one of claims 14 to 19, wherein the terminal uses the first PDCP entity of the terminal, and the first PDCP entity of the first access network device and the first The second PDCP entity of the second access network device performs data transmission, and further includes:

The first access network device and the second access network device transmit second compression information of the header compression processing or decompression processing.
The method according to claim 20, wherein the second compression information of the header compression processing or the decompression processing is transmitted in a resource block as a transmission unit.
The method according to claim 20, wherein the second compression information of the header compression processing or decompression processing is carried in a handover request or a handover command.
The method according to any one of claims 14 to 19, the terminal uses the first PDCP entity of the terminal, and the first PDCP entity of the first access network device and the second access network The second PDCP entity of the device performs data transmission, and further includes:

The terminal resets the second compressed information.
The method according to claim 23, wherein the terminal resetting the second compressed information includes:

If the first condition is satisfied, the terminal resets the second compressed information of the downlink data; the first condition includes at least one of the following:

Receive the switch command;

Start receiving a specific data packet with SN x;

Start of receiving data packet with End-marker instruction;

Receive specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

When the protocol stack corresponding to the source access network device is released; and

When there is no more data transmission with the source access network equipment;

If the second condition is satisfied, the terminal resets the second compressed information of the uplink data; the second condition includes at least one of the following:

Receive the switch command;

When sending a handover complete message;

After sending the handover complete message;

Start sending a specific data packet with SN x;

Start sending data packets with End-marker indication;

Send specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

Release the protocol stack corresponding to the source access network device; and

There is no longer data transmission with the source access network equipment.
The method according to claim 20, wherein the second compression information of the header compression processing or decompression processing is transmitted after the path conversion process.
A terminal is characterized by comprising:

The transmission unit is configured to use the first PDCP entity of the terminal, the first PDCP entity of the first access network device or the first PDCP entity of the first access network device during the handover process and The second PDCP entity of the second access network device performs data transmission; wherein,

The first PDCP entity of the terminal is one of the two PDCP entities of the terminal;

The first PDCP entity of the terminal and the first PDCP entity of the first access network device correspond to a first protocol stack, and the second PDCP entity of the terminal and the second PDCP entity of the second access network device Corresponding to the second protocol stack.
The terminal according to claim 26, wherein the first access network device is a source access network device, and the second access network device is a target access network device; or the first access The network device is a target access network device, and the second access network device is a source access network device.
The terminal according to claim 26, wherein the transmission unit is specifically used for

Use the first PDCP entity of the terminal to decompress the first downlink data packet sent by the first access network device; wherein, the first downlink data packet is the first access network The first PDCP entity of the device obtains header compression processing on the first downlink data; and / or

Use the first PDCP entity of the terminal to decompress the second downlink data packet sent by the second access network device; wherein, the second downlink data packet is of the first access network device The first PDCP entity performs header compression processing on the second downlink data to obtain and send it to the second access network device.
The terminal according to claim 28, wherein the transmission unit is further used for

Sending first uplink feedback information to the first access network device, where the first uplink feedback information includes uplink feedback information of the first downlink data packet and / or uplink feedback information of the second downlink data packet ;and / or

Sending second uplink feedback information to the second access network device, where the second uplink feedback information includes uplink feedback information of the first downlink data packet and / or uplink feedback information of the second downlink data packet For the second access network device to send the second uplink feedback information to the first access network device.
The terminal according to claim 26, wherein the transmission unit is specifically used for

Use the first PDCP entity of the terminal to perform header compression processing on the first uplink data to obtain a first uplink data packet, and send the first uplink data packet to the first access network device for The first access network device uses the first PDCP entity of the first access network device to decompress the first uplink data packet; and / or

Use the first PDCP entity of the terminal to perform header compression processing on the second uplink data to obtain a second uplink data packet, and send the second uplink data packet to the second access network device. The second access network device sends to the first access network device for the first access network device to use the first PDCP entity of the first access network device for the second uplink data The package is decompressed.
The terminal according to claim 30, wherein the transmission unit is further used for

Receiving first downlink feedback information sent by the first access network device, where the first downlink feedback information includes downlink feedback information of the first uplink data packet and / or downlink of the second uplink data packet Feedback information, the first downlink feedback information is generated for the first access network device, or generated for the second access network device and sent to the first access network device; and / or

Receiving second downlink feedback information sent by the second access access network device, where the second downlink feedback information includes downlink feedback information of the first uplink data packet and / or downlink of the second uplink data packet For feedback information, the second downlink feedback information is generated for the second access network device, or generated for the first access network device and sent to the second access network device.
The terminal according to claim 30, wherein the first uplink data packet and / or the second uplink data packet after the decompression process

Sent by the first access network device to the core network device; and / or

Sent by the first access network device to the second access network device, and sent by the second access network device to the core network device.
The terminal according to any one of claims 28 to 32, characterized in that

The first compression information of the header compression processing or decompression processing is sent by the second access network device to the first access network device.
The terminal according to claim 33, wherein the first compression information of the header compression process or the decompression process is transmitted in a resource block as a transmission unit.
The terminal according to claim 33, wherein the first compression information of the header compression processing or decompression processing is carried in a handover request or a handover command.
The terminal according to any one of claims 28 to 32, wherein the transmission unit is further used for

Reset the first compression information of the header compression processing or decompression processing.
The terminal according to claim 36, wherein the transmission unit is specifically used for

If the first condition is satisfied, the first compressed information of the downlink data is reset; the first condition includes at least one of the following:

Receive the switch command;

Start receiving a specific data packet with SN x;

Start of receiving data packet with End-marker instruction;

Receive specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

When the protocol stack corresponding to the source access network device is released; and

When there is no more data transmission with the source access network equipment;

If the second condition is satisfied, the first compressed information of the upstream data is reset; the second condition includes at least one of the following:

Receive the switch command;

When sending a handover complete message;

After sending the handover complete message;

Start sending a specific data packet with SN x;

Start sending data packets with End-marker indication;

Send specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

Release the protocol stack corresponding to the source access network device; and

There is no longer data transmission with the source access network equipment.
The terminal according to claim 33, wherein the first compression information of the header compression processing or decompression processing is transmitted after the path switching process.
The terminal according to claim 26, wherein the transmission unit is specifically used for

Use the first PDCP entity of the terminal to decompress the third downlink data packet sent by the first access network device; wherein, the third downlink data packet is the data of the first access network device The first PDCP entity performs header compression processing on the third downlink data, or performs header compression processing on the third downlink data for the second PDCP entity of the second access network device, and sends it to the first access network Equipment; and / or

Use the first PDCP entity of the terminal to decompress the fourth downlink data packet sent by the second access network device; wherein, the fourth downlink data packet is of the first access network device The first PDCP entity performs header compression processing on the fourth downlink data and sends it to the second access network device, or performs header compression processing on the fourth downlink data for the second PDCP entity of the second access network device obtain.
The terminal according to claim 39, wherein the transmission unit is further used for

Sending third uplink feedback information to the first access network device, where the third uplink feedback information includes uplink feedback information of the third downlink data packet and / or uplink feedback information of the fourth downlink data packet; and / or

Sending fourth uplink feedback information to the second access network device, where the fourth uplink feedback information includes uplink feedback information of the third downlink data packet and / or uplink feedback information of the fourth downlink data packet.
The terminal according to claim 40, wherein the third uplink feedback information and / or the fourth uplink feedback information is between the first access network device and the second access network device transmission.
The terminal according to claim 26, wherein the transmission unit is specifically used for

Use the first PDCP entity of the terminal to perform header compression processing on the third uplink data to obtain a third uplink data packet, and send the third uplink data packet to the first access network device for The first access network device uses the first PDCP entity of the first access network device to decompress the third uplink data packet, or the first access network device transfers the third uplink data packet The data packet is sent to the second access network device, and the second access network device uses the second PDCP entity of the second access network device to decompress the third uplink data packet; and / or

Use the first PDCP entity of the terminal to perform header compression processing on the fourth uplink data to obtain a fourth uplink data packet, and send the fourth uplink data packet to the second access network device for The second access network device uses the second PDCP entity of the second access network device to decompress the fourth uplink data packet, or the second access network device transfers the fourth uplink data packet The data packet is sent to the first access network device, and the first access network device uses the first PDCP entity of the first access network device to decompress the fourth uplink data packet.
The terminal according to claim 42, wherein the transmission unit is further used for

Receiving third downlink feedback information sent by the first access network device, where the third downlink feedback information includes downlink feedback information of the third uplink data packet and / or downlink feedback information of the fourth uplink data packet , The third downlink feedback information is generated for the first access network device, or generated for the second access network device and sent to the first access network device; and / or

Receiving fourth downlink feedback information sent by the second access access network device, where the fourth downlink feedback information includes downlink feedback information of the third uplink data packet and / or downlink of the fourth uplink data packet For feedback information, the fourth downlink feedback information is generated for the second access network device, or generated for the first access network device and sent to the second access network device.
The terminal according to claim 42, wherein the third uplink data packet and / or the fourth uplink data packet after the decompression process

Sent by the first access network device to the core network device, or sent to the second access network device, and sent by the second access network device to the core network device; and / or

Sent by the second access network device to the core network device, or sent to the first access network device, and sent by the first access network device to the core network device.
The terminal according to any one of claims 39 to 44, wherein:

The second compressed information of the header compression processing or decompression processing is transmitted between the first access network device and the second access network device.
The terminal according to claim 45, wherein the second compression information of the header compression process or the decompression process is transmitted using a resource block as a transmission unit.
The terminal according to claim 45, wherein the second compression information of the header compression processing or decompression processing is carried in a handover request or a handover command.
The terminal according to any one of claims 39 to 44, wherein the transmission unit is further used for

Reset the second compression information.
The terminal according to claim 48, wherein the transmission unit is specifically used for

If the first condition is satisfied, the terminal resets the second compressed information of the downlink data; the first condition includes at least one of the following:

Receive the switch command;

Start receiving a specific data packet with SN x;

Start of receiving data packet with End-marker instruction;

Receive specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

When the protocol stack corresponding to the source access network device is released; and

When there is no more data transmission with the source access network equipment;

If the second condition is satisfied, the second compression information of the upstream data is reset; the second condition includes at least one of the following conditions:

Receive the switch command;

When sending a handover complete message;

After sending the handover complete message;

Start sending a specific data packet with SN x;

Start sending data packets with End-marker indication;

Send specific indication information in the PDU header of the PDCP entity;

Receive the instruction message of path conversion completion;

Release the protocol stack corresponding to the source access network device; and

There is no longer data transmission with the source access network equipment.
The terminal according to claim 45, wherein the second compression information of the header compression processing or decompression processing is transmitted after the path switching process.