CN112544104A - Data transmission method and terminal - Google Patents

Data transmission method and terminal Download PDF

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Publication number
CN112544104A
CN112544104A CN201880096335.4A CN201880096335A CN112544104A CN 112544104 A CN112544104 A CN 112544104A CN 201880096335 A CN201880096335 A CN 201880096335A CN 112544104 A CN112544104 A CN 112544104A
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China
Prior art keywords
access network
network device
data packet
pdcp entity
terminal
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CN201880096335.4A
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CN112544104B (en
Inventor
卢前溪
尤心
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Abstract

The embodiment of the invention provides a data transmission method and a terminal. In this embodiment of the present invention, in the handover process based on the eMBB, the terminal may simultaneously and respectively maintain the protocol stacks of the source access network device and the target access network device, and respectively correspond to different PDCP entities, that is, the first PDCP entity and the second PDCP entity, and may perform data transmission 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 PDCP entity of the second access network device by using the first PDCP entity of the terminal, thereby implementing data transmission in the handover mode based on the eMBB.

Description

Data transmission method and terminal Technical Field
The present invention relates to wireless communication technologies, and in particular, to a data transmission method and a terminal.
Background
In the existing handover process, a terminal and an access network device maintain a set of Protocol stacks at the same time, and also only correspond to a Packet Data Convergence Protocol (PDCP) entity. The terminal only maintains the protocol stack of the source access network device to perform data transmission with the source access network device, or only maintains the protocol stack of the target access network device to perform data transmission with the target access network device.
In a New Radio (NR) system, such as a 5G application, in order to reduce a handover delay, a New handover method based on enhanced Make-before-break (eMBB) is proposed. In such a handover procedure based on the eMBB, the terminal may simultaneously maintain the protocol stacks with the source access network device and the target access network device, respectively, and correspond to different PDCP entities, respectively.
Therefore, it is desirable to provide a data transmission method for implementing data transmission in an eMBB-based handover scheme.
Disclosure of Invention
Aspects of the present invention provide a data transmission method and a terminal, which are used to implement data transmission in an eMBB-based handover scheme.
In one aspect of the present invention, a data transmission method is provided, including:
in the switching process, the terminal utilizes the first PDCP entity of the terminal to carry out data transmission with the first PDCP entity of the first access network equipment or with the first PDCP entity of the first access network equipment and the second PDCP entity of the second access network equipment; wherein the content of the first and second substances,
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 correspond to a second protocol stack.
In another aspect of the present invention, there is provided a terminal, including:
a transmitting unit, configured to perform data transmission with a first PDCP entity of the first access network device or with the first PDCP entity of the first access network device and a second PDCP entity of the second access network device by using the first PDCP entity of the terminal in a handover process; wherein the content of the first and second substances,
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 correspond to a second protocol stack.
As can be seen from the foregoing technical solutions, in the eMBB-based handover process in the embodiments of the present invention, a terminal may simultaneously and respectively maintain protocol stacks of a source access network device and a target access network device, and respectively correspond to different PDCP entities, that is, a first PDCP entity and a second PDCP entity, and may perform data transmission 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 PDCP entity of the second access network device by using the first PDCP entity of the terminal, so as to implement data transmission in an eMBB-based handover mode.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without inventive labor.
Fig. 1 is a schematic flow chart 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
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Fig. 1 is a flowchart illustrating a data transmission method according to an embodiment of the present invention, as shown in fig. 1.
101. In the switching process, the terminal utilizes the first PDCP entity of the terminal to carry out data transmission with the first PDCP entity of the first access network equipment or with the first PDCP entity of the first access network equipment and the second PDCP entity of the second access network equipment.
Wherein the content of the first and second substances,
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 correspond to a second protocol stack.
It should be noted that the Access Network device related in the present invention may be an Evolved NodeB (eNB) in an Evolved Universal Mobile telecommunications System terrestrial Radio Access Network (E-UTRAN), or may also be a gbb (G-nb) in a Next Generation Radio Access Network (NG-RAN), which is not particularly limited in this embodiment.
The Core Network device related in the present invention may be a Mobility Management device, and specifically may be an Access and Mobility Management Function (AMF) in a 5G Core Network, that is, a Next Generation Core Network (NGCN), or may also be a Mobility Management Entity (MME) in an Evolved Packet Core (EPC), that is, a 4G Core Network, and this embodiment is not particularly limited to this.
The core idea of the present invention is that, in the handover process based on the eMBB, a terminal may simultaneously and respectively maintain a protocol stack with a source access network device and a protocol stack with a target access network device, and respectively correspond to different PDCP entities, that is, a first PDCP entity and a second PDCP entity, and may perform data transmission 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 PDCP entity of the second access network device by using the first PDCP entity of the terminal, thereby implementing data transmission in the handover mode based on the eMBB.
It should be noted that the present embodiment may be applicable to device handover between radio access networks of the same type, for example, handover from one gNB to another gNB in NG-RAN, or handover from one eNB to another eNB in E-UTRAN, for example, or may also be applicable to network handover between radio access networks of different types, for example, network handover from NG-RAN to E-UTRAN, or network handover from E-UTRAN to NG-RAN, for example, which is not particularly limited in the present 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 the first access network device may be a target access network device, and the second access network device is 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, which is utilized by the terminal, may be determined by the terminal according to an instruction of the first access network device or the second access network device, or may also be determined by the terminal according to pre-configured configuration information, which is not particularly limited in this embodiment.
In the present invention, the terminal may simultaneously and respectively maintain a protocol stack, i.e., a first protocol stack, of the first access network device and a protocol stack, i.e., a second protocol stack, of the second access network device, and respectively correspond to different PDCP entities, i.e., a first PDCP entity and a second PDCP entity.
In the handover process, in the first data transmission mode, the terminal may specifically perform data transmission with the first PDCP entity of the first access network device by using one of the two PDCP entities of the terminal, that is, the first PDCP entity; in the second data transmission mode, the terminal may specifically perform data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device by using one of the two PDCP entities of the terminal, that is, the first PDCP entity.
In the first data transmission method, the following transmission method may be used for the transmission of downlink data. The present invention relates to header compression and decompression of downlink data.
The Header Compression process may be a Robust Header Compression (ROHC) process or may be another Header Compression process, which is not particularly limited in this embodiment.
The decompression process may be a decompression process corresponding to the ROHC process, or may be a decompression process corresponding to another header compression process, as long as the decompression process corresponds to the header compression process used, and this embodiment is not particularly limited.
And a transmission mode A: the terminal may specifically utilize 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 first downlink data for a 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.
And a transmission mode B: the terminal may specifically utilize 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 performing header compression processing on second downlink data for the first PDCP entity of the first access network device, and sending the second downlink data packet to the second 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.
And a transmission mode C: and combining the transmission mode A and the transmission mode B to realize the transmission of the downlink data.
Optionally, in a possible implementation manner of this embodiment, in a first data transmission manner, the terminal may specifically send first uplink feedback information to the first access network device, where the first 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 Control PDU for an interactive ROHC feedback of a distributed robust header compression feedback, or may also be a Control PDU for other compression feedback, which is not particularly limited in this embodiment.
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.
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, 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, so that the second access network device sends the second uplink feedback information to the first access network device.
The second uplink feedback information may be a Control PDU for an interactive ROHC feedback of a distributed robust header compression feedback, or may also be a Control PDU for other compression feedback, which is not particularly limited in this embodiment.
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.
Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the terminal may specifically transmit the first uplink feedback information and the second uplink feedback information by using a combination of technical solutions in the two implementation manners.
In the first data transmission method, the following transmission method may be used for transmission of uplink data. The header compression processing and decompression processing of the upstream data are involved.
The Header Compression process may be a Robust Header Compression (ROHC) process or may be another Header Compression process, which is not particularly limited in this embodiment.
The decompression process may be a decompression process corresponding to the ROHC process, or may be a decompression process corresponding to another header compression process, as long as the decompression process corresponds to the header compression process used, and this embodiment is not particularly limited.
And a transmission mode D: the terminal may specifically perform header compression processing on first uplink data by using the first PDCP entity of the terminal to obtain a first uplink data packet, and send the first uplink data packet to the first access network device, so that the first access network device decompresses the first uplink data packet by using the first PDCP entity of the first access network device.
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.
And a transmission mode E: the terminal may specifically perform header compression processing on second uplink data by using the first PDCP entity of the terminal to obtain a second uplink data packet, and send the second uplink data packet to the second access network device, and the second uplink data packet is sent to the first access network device by the second access network device, so that the first access network device decompresses the second uplink data packet by using the first PDCP entity of the first access network device.
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.
And a transmission mode F: and combining the transmission mode D and the transmission mode E to realize the transmission of the downlink data. At this time, after receiving the first uplink data packet and the second uplink data packet, the first network device may further perform aggregation (merge) processing on the first uplink data packet and the second uplink data packet, and then decompress the first uplink data packet and the second uplink data packet after the aggregation processing.
Optionally, in a possible implementation manner of this embodiment, in a first data transmission manner, the terminal may specifically receive first downlink feedback information sent by the first access network device, where 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 generated for the first access 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 Control PDU for an interactive ROHC feedback (robpdu) for distributed robust header compression feedback, or may also be another Control PDU for compression feedback, which is not particularly limited in this embodiment.
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.
Optionally, in a possible implementation manner of this embodiment, in a first data transmission manner, the terminal may specifically receive second downlink feedback information sent by the second access network device, where 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 generated for the second access network 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 Control PDU for an interactive ROHC feedback (robpdu) for distributed robust header compression feedback, or may also be another Control PDU for compression feedback, which is not particularly limited in this embodiment.
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.
Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the terminal may specifically transmit the first downlink feedback information and the second downlink feedback information by using a combination of technical solutions in the two implementation manners.
In a first data transmission manner, after a first access network device decompresses a first uplink data packet and/or a second uplink data packet, the first access network device may directly send the first uplink data packet and/or the second uplink data packet after the decompression processing to a core network device, or the first access network device may also send the first uplink data packet and/or the second uplink data packet after the decompression processing to the core network device through a second access network device, that is, the first access network device may send the first uplink data packet and/or the second uplink data packet after the decompression processing to the second access network device, so that the second access network device sends the first uplink data packet and/or the second uplink data packet after the decompression processing to the core network device, or, the first access network device may further send the first uplink data packet and/or the second uplink data packet after the decompression processing to a core network device in combination with the foregoing two manners, which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, in the first data transmission manner, the first access network device may further receive first compression information that is subjected to header compression processing or decompression processing and sent by the second access network device, so as to serve as compression information that is used by the first access network device to perform header compression processing or decompression processing.
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.
In this implementation, the first compression information may include, but is not limited to, at least one of the following information:
context (context), sub-protocol identification (profile ID), sliding window (sliding window), translation table (translation table), flag (flag), and field (field).
In this implementation, the first compression information of the header compression processing or the decompression processing may be transmitted in a resource block as a transmission unit, or may also be transmitted in another resource unit as a transmission unit, which is not particularly limited in this embodiment.
In a specific implementation process, the first compression information of the header compression processing or the 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, the terminal may further reset the first compression information. Correspondingly, the first access network device also needs to reset the first compressed information to ensure the synchronization of the terminal and the network side.
For example, if a first condition is met, the terminal resets first compression information of downlink data; the first condition may include, but is not limited to, at least one of the following:
receiving a switching command;
beginning with receiving a data packet with a specific Sequence Number (SN) of x;
receiving a data packet start with an End-marker (End-marker) indication;
receiving specific indication information in a Protocol Data Unit (PDU) header of a PDCP entity;
receiving path conversion completion indication information;
when releasing the protocol stack corresponding to the source access network equipment; and
when there is no more data transmission with the source access network device.
Or, for another example, if the second condition is met, 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:
receiving a switching command;
when the switching completion message is sent;
after sending the switching completion message;
starting to send a specific data packet with SN x;
starting to send a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of a PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
there is no more data transmission with the source access network device.
In a specific implementation procedure, the first compression information of the header compression processing or the decompression processing may be transmitted after a Path Switch (Path Switch) procedure.
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.
In the second data transmission method, the following transmission method may be used for the transmission of the downlink data. The present invention relates to header compression and decompression of downlink data.
The Header Compression process may be a Robust Header Compression (ROHC) process or may be another Header Compression process, which is not particularly limited in this embodiment.
The decompression process may be a decompression process corresponding to the ROHC process, or may be a decompression process corresponding to another header compression process, as long as the decompression process corresponds to the header compression process used, and this embodiment is not particularly limited.
The transmission mode A': the terminal may specifically utilize the first PDCP entity of the terminal to decompress the third downlink data packet sent by the first access network device; the third downlink data packet may be obtained by performing header compression processing on third downlink data by the first PDCP entity of the first access network device, or may also be obtained by performing header compression processing on third downlink data by the second PDCP entity of the second access network device and sent to the first access network device.
A transmission mode B': the terminal decompresses a fourth downlink data packet sent by the second access network equipment by using a first PDCP entity of the terminal; the fourth downlink data packet may be obtained by performing header compression processing on fourth downlink data for the first PDCP entity of the first access network device and sending the fourth downlink data to the second access network device, or may also be obtained by performing header compression processing on fourth downlink data for the second PDCP entity of the second access network device.
A transmission mode C': and realizing the transmission of the downlink data by combining the transmission mode A 'and the transmission mode B'.
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, where the third 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 uplink feedback information may be a Control PDU for an interactive ROHC feedback of a distributed robust header compression feedback, or may also be a Control PDU for other compression feedback, which is not particularly limited in this embodiment.
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, where the fourth 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 Control PDU for an interactive ROHC feedback of a distributed robust header compression feedback, or may also be a Control PDU for other compression feedback, which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the terminal may specifically transmit the third uplink feedback information and the fourth uplink feedback information by using a combination of technical solutions in the two implementation manners.
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 uplink feedback information and/or the fourth uplink feedback information with the second access network device.
In the second data transmission scheme, the following transmission scheme may be adopted for the transmission of uplink data. The header compression processing and decompression processing of the upstream data are involved.
The Header Compression process may be a Robust Header Compression (ROHC) process or may be another Header Compression process, which is not particularly limited in this embodiment.
The decompression process may be a decompression process corresponding to the ROHC process, or may be a decompression process corresponding to another header compression process, as long as the decompression process corresponds to the header compression process used, and this embodiment is not particularly limited.
A transmission mode D': the terminal may specifically perform header compression processing on third uplink data by using the first PDCP entity of the terminal to obtain a third uplink data packet, and send the third uplink data packet to the first access network device, so that the first access network device decompresses the third uplink data packet by using the first PDCP entity of the first access network device, or the first access network device sends the third uplink data packet to the second access network device, and the second access network device decompresses the third uplink data packet by using the second PDCP entity of the second access network device
A transmission mode E': the terminal may specifically perform header compression processing on fourth uplink data by using the first PDCP entity of the terminal to obtain a fourth uplink data packet, and send the fourth uplink data packet to the second access network device, so that the second access network device decompresses the fourth uplink data packet by using the second PDCP entity of the second access network device, or the second access network device sends the fourth uplink data packet to the first access network device, and the first access network device decompresses the fourth uplink data packet by using the first PDCP entity of the first access network device
A transmission mode F': and realizing the transmission of the downlink data by combining the transmission mode D 'and the transmission mode E'. At this time, after receiving the third uplink data packet and the fourth uplink data packet, the first network device may further perform aggregation (merge) processing on the third uplink data packet and the fourth uplink data packet, and then perform decompression processing on the third uplink data packet and the fourth uplink data packet after aggregation processing.
A transmission mode G': and realizing the transmission of the downlink data by combining the transmission mode D 'and the transmission mode E'. At this time, the first network device decompresses the third uplink data packet after receiving the third uplink data packet, and the second network device decompresses the fourth uplink data packet after receiving the fourth uplink data packet, and then the first network device or the second network device performs convergence (merge) processing on the third uplink data packet and the fourth uplink data packet.
Optionally, in a possible implementation manner of this embodiment, in a second data transmission manner, the terminal may specifically receive third downlink feedback information sent by the first access network device, where the third 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 may also be generated for the second access network device and sent to the first access network device.
The third downlink feedback information may be a Control PDU for an interactive ROHC feedback of a distributed robust header compression feedback, or may also be a Control PDU for other compression feedback, which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, in a second data transmission manner, the terminal may specifically receive fourth downlink feedback information sent by the second access network device, where 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 generated for the second access network 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 Control PDU for an interactive ROHC feedback of a distributed robust header compression feedback, or may also be a Control PDU for other compression feedback, which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, the terminal may specifically transmit the third downlink feedback information and the fourth downlink feedback information by using a combination of technical solutions in the two implementation manners.
Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, after the first access network device decompresses the third uplink data packet and/or the fourth uplink data packet, the first access network device may directly send the third uplink data packet and/or the fourth uplink data packet after the decompression processing to the core network device, or the first access network device may further send the third uplink data packet and/or the fourth uplink data packet after the decompression processing to the core network device through the second access network device, that is, the first access network device may send the third uplink data packet and/or the fourth uplink data packet after the decompression processing to the second access network device, so that the second access network device sends the third uplink data packet and/or the fourth uplink data packet after the decompression processing to the core network device And/or the fourth uplink data packet, or the first access network device may further send, by combining the foregoing two manners, the third uplink data packet and/or the fourth uplink data packet after decompression processing to a core network device, which is not limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, in the second data transmission manner, after the second access network device decompresses the third uplink data packet and/or the fourth uplink data packet, the second access network device may directly send the decompressed third uplink data packet and/or the decompressed fourth uplink data packet to the core network device, or the second access network device may also send the decompressed third uplink data packet and/or the decompressed fourth uplink data packet to the core network device through the first access network device, that is, the second access network device may send the decompressed third uplink data packet and/or the decompressed fourth uplink data packet to the first access network device, so that the first access network device sends the decompressed third uplink data packet and/or the decompressed fourth uplink data packet to the core network device And/or the fourth uplink data packet, or the second access network device may further send, by combining the foregoing two manners, the third uplink data packet and/or the fourth uplink data packet after decompression processing to a core network device, which is not limited in 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 a combination of technical solutions in the two implementation manners to send the third uplink data packet and/or the fourth uplink data packet after decompression processing 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 a 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, with the second access network device, second compressed information of the header compression processing or the header decompression processing, so as to serve as compressed information used by the first access network device and the second access network device to perform the header compression processing or the header decompression processing.
In this implementation, the second compression information may include, but is not limited to, at least one of the following information:
context (context), sub-protocol identification (profile ID), sliding window (sliding window), translation table (translation table), flag (flag), and field (field).
In this implementation, the second compressed information of the header compression processing or the header decompression processing may be transmitted in a resource block transmission unit, or may also be transmitted in another resource unit transmission unit, which is not particularly limited in this embodiment.
In a specific implementation process, the second compression information of the header compression processing or the header 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.
For example, when the source access network device receives the handover command, the source access network device sends the second compressed information of the header compression processing or decompression processing to the target access network device. And then, before the source access network device does not release the corresponding protocol stack, performing periodic interaction between the source access network device and the target access network device, or triggering the interaction by the source access network device.
In this implementation, the terminal may further reset the second compression 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 between the terminal and the network side.
For example, if the third condition is met, the terminal resets the second compression information of the downlink data; the third condition may include, but is not limited to, at least one of the following:
receiving a switching command;
beginning with receiving a data packet with a specific Sequence Number (SN) of x;
receiving a data packet start with an End-marker (End-marker) indication;
receiving specific indication information in a Protocol Data Unit (PDU) header of a PDCP entity;
receiving path conversion completion indication information;
when releasing the protocol stack corresponding to the source access network equipment; and
when there is no more data transmission with the source access network device.
Or, for another example, if the fourth condition is met, the terminal resets the second compression information of the uplink data; the fourth condition may include, but is not limited to, at least one of the following:
receiving a switching command;
when the switching completion message is sent;
after sending the switching completion message;
starting to send a specific data packet with SN x;
starting to send a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of a PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
there is no more data transmission with the source access network device.
In a specific implementation procedure, the second compression information of the header compression processing or the decompression processing may be transmitted after a Path Switch (Path Switch) procedure.
In this embodiment, in the handover process based on the eMBB, the terminal may simultaneously and respectively maintain the protocol stacks of the source access network device and the target access network device, and respectively correspond to different PDCP entities, that is, the first PDCP entity and the second PDCP entity, and may perform data transmission 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 PDCP entity of the second access network device by using the first PDCP entity of the terminal, thereby implementing data transmission in the handover mode based on the eMBB.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of 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 of this embodiment may include a transmission unit 21, and may be configured to perform data transmission 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 PDCP entity of the second access network device by using the first PDCP entity of the terminal in a handover process.
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 correspond to a second protocol stack.
It should be noted that the Access Network device related in the present invention may be an Evolved NodeB (eNB) in an Evolved Universal Mobile telecommunications System terrestrial Radio Access Network (E-UTRAN), or may also be a gbb (G-nb) in a Next Generation Radio Access Network (NG-RAN), which is not particularly limited in this embodiment.
The Core Network device related in the present invention may be a Mobility Management device, and specifically may be an Access and Mobility Management Function (AMF) in a 5G Core Network, that is, a Next Generation Core Network (NGCN), or may also be a Mobility Management Entity (MME) in an Evolved Packet Core (EPC), that is, a 4G Core Network, and this embodiment is not particularly limited to this.
The core idea of the present invention is that, in the handover process based on the eMBB, a terminal may simultaneously and respectively maintain a protocol stack with a source access network device and a protocol stack with a target access network device, and respectively correspond to different PDCP entities, that is, a first PDCP entity and a second PDCP entity, and may perform data transmission 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 PDCP entity of the second access network device by using the first PDCP entity of the terminal, thereby implementing data transmission in the handover mode based on the eMBB.
It should be noted that the present embodiment may be applicable to device handover between radio access networks of the same type, for example, handover from one gNB to another gNB in NG-RAN, or handover from one eNB to another eNB in E-UTRAN, for example, or may also be applicable to network handover between radio access networks of different types, for example, network handover from NG-RAN to E-UTRAN, or network handover from E-UTRAN to NG-RAN, for example, which is not particularly limited in the present 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 the first access network device may be a target access network device, and the second access network device is a source access network device, which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, the first PDCP entity of the terminal, which is utilized by the transmission unit 21, may be determined by the transmission unit 21 according to an instruction of the first access network device or the second access network device, or may also be determined according to pre-configured configuration information, which is not particularly limited in this embodiment.
In the present invention, the terminal may simultaneously and respectively maintain a protocol stack, i.e., a first protocol stack, of the first access network device and a protocol stack, i.e., a second protocol stack, of the second access network device, and respectively correspond to different PDCP entities, i.e., a first PDCP entity and a second PDCP entity.
Optionally, in a possible implementation manner of this embodiment, the transmission unit 21 may be specifically configured to
Decompressing a first downlink data packet sent by the first access network equipment by using a first PDCP entity of the terminal; the first downlink data packet is obtained by performing header compression processing on first downlink data by a first PDCP entity of the first access network device; and/or
Decompressing a second downlink data packet sent by the second access network device by using a first PDCP entity of the terminal; and the second downlink data packet is obtained by performing header compression processing on second downlink data by the first PDCP entity of the first access network device and is sent to the second access network device.
In this implementation, the transmission unit 21 may be further configured to
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
And sending second uplink feedback information to the second access network equipment, wherein the second uplink feedback information comprises the uplink feedback information of the first downlink data packet and/or the uplink feedback information of the second downlink data packet, so that the second access network equipment sends the second uplink feedback information to the first access network equipment.
Optionally, in a possible implementation manner of this embodiment, the transmission unit 21 may be specifically configured to
Performing header compression processing on first uplink data by using a first PDCP entity of the terminal to obtain a first uplink data packet, and sending the first uplink data packet to the first access network equipment, so that the first access network equipment decompresses the first uplink data packet by using the first PDCP entity of the first access network equipment; and/or
And performing header compression processing on second uplink data by using a first PDCP entity of the terminal to obtain a second uplink data packet, sending the second uplink data packet to the second access network equipment, and sending the second uplink data packet to the first access network equipment by the second access network equipment, so that the first access network equipment decompresses the second uplink data packet by using the first PDCP entity of the first access network equipment.
In this implementation, the transmission unit 21 may be further configured to
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 feedback information of the second uplink data packet, and 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
And receiving second downlink feedback information sent by the second access network device, where the second downlink feedback information includes 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 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, the transmission unit 21 may be further configured to send the first uplink data packet and/or the second uplink data packet after the decompression processing to a core network device by the first access network device, or send the first uplink data packet and/or the second uplink data packet to the second access network device by the first access network device and send the second uplink data packet to the core network device by the second access network device, or send the first uplink data packet and/or the second uplink data packet to the core network device by combining the two manners, which is not particularly limited in this embodiment.
In this implementation, the first compressed information of the header compression processing or the header decompression processing may be sent to the first access network device by the second access network device.
In this implementation, the first compression information of the header compression processing or the decompression processing may be transmitted in a resource block as a transmission unit, or may also be transmitted in another resource unit as a transmission unit, which is not particularly limited in this embodiment.
In a specific implementation process, the first compressed information of the header compression processing or the 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, the transmission unit 21 may be further configured to reset the first compression information of the header compression processing or the decompression processing. Correspondingly, the first access network device also needs to reset the first compressed information to ensure the synchronization of the terminal and the network side.
For example, the transmission unit 21 may be specifically used for
If the first condition is met, resetting first compression information of the downlink data; the first condition includes at least one of:
receiving a switching command;
starting with the receipt of a particular data packet having an SN x;
receiving a data packet with an End-marker indication;
receiving specific indication information in a PDU header of a PDCP entity;
receiving path conversion completion indication information;
when releasing the protocol stack corresponding to the source access network equipment; and
when there is no more data transmission with the source access network device.
Alternatively, and again for example, the transmission unit 21 may be used in particular for
If the second condition is met, the terminal resets the first compression information of the uplink data; the second condition includes at least one of:
receiving a switching command;
when the switching completion message is sent;
after sending the switching completion message;
starting to send a specific data packet with SN x;
starting to send a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of a PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
there is no more data transmission with the source access network device.
In a specific implementation procedure, the first compression information of the header compression processing or the decompression processing may be transmitted after a Path Switch (Path Switch) procedure.
Optionally, in a possible implementation manner of this embodiment, the transmission unit 21 may be specifically configured to
Decompressing a third downlink data packet sent by the first access network device by using a first PDCP entity of the terminal; the third downlink data packet is obtained by performing header compression processing on third downlink data by the first PDCP entity of the first access network device, or is obtained by performing header compression processing on third downlink data by the second PDCP entity of the second access network device and is sent to the first access network device; and/or
Decompressing a fourth downlink data packet sent by the second access network device by using the first PDCP entity of the terminal; the fourth downlink data packet is obtained by performing header compression processing on fourth downlink data by the first PDCP entity of the first access network device and sending the fourth downlink data to the second access network device, or is obtained by performing header compression processing on fourth downlink data by the second PDCP entity of the second access network device.
In this implementation, the transmission unit 21 may be further configured to
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
And 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.
Optionally, in a possible implementation manner of this embodiment, the transmission unit 21 may be specifically configured to
Performing header compression processing on third uplink data by using a first PDCP entity of the terminal to obtain a third uplink data packet, and sending the third uplink data packet to the first access network device, so that the first access network device decompresses the third uplink data packet by using the first PDCP entity of the first access network device, or the first access network device sends the third uplink data packet to the second access network device, and the second access network device decompresses the third uplink data packet by using a second PDCP entity of the second access network device; and/or
Performing header compression processing on fourth uplink data by using the first PDCP entity of the terminal to obtain a fourth uplink data packet, and sending the fourth uplink data packet to the second access network device, so that the second access network device decompresses the fourth uplink data packet by using the second PDCP entity of the second access network device, or sending the fourth uplink data packet to the first access network device by using the second PDCP entity of the first access network device, and decompressing the fourth uplink data packet by using the first PDCP entity of the first access network device by using the first access network device.
In this implementation, the transmission unit 21 may be further configured to
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, and 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 network device, where the fourth downlink feedback information includes 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 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, the third uplink data packet and/or the fourth uplink data packet after the decompression processing may be sent to a core network device by the first access network device, or sent to the second access network device, and sent to the core network device by the second access network device, or also sent to the core network device by the second access network device, or sent to the first access network device, and sent to the core network device by the first access network device, or also sent to the core network device by using the above two manners, which is not particularly limited in this embodiment.
In this implementation, the header compression processed or the second compression information of the decompression processed may be transmitted between the first access network device and the second access network device.
In this implementation, the second compressed information of the header compression processing or the header decompression processing may be transmitted in a resource block transmission unit, or may also be transmitted in another resource unit transmission unit, which is not particularly limited in this embodiment.
In a specific implementation process, the second compression information of the header compression processing or the header 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, the transmission unit 21 may be further configured to reset the second compression information of the header compression processing or the decompression processing. Correspondingly, the first access network device and the second access network device also need to reset the second compressed information to ensure the synchronization of the terminal and the network side.
For example, the transmission unit 21 may be specifically used for
If the first condition is met, the terminal resets second compression information of the downlink data; the first condition includes at least one of:
receiving a switching command;
starting with the receipt of a particular data packet having an SN x;
receiving a data packet with an End-marker indication;
receiving specific indication information in a PDU header of a PDCP entity;
receiving path conversion completion indication information;
when releasing the protocol stack corresponding to the source access network equipment; and
when there is no more data transmission with the source access network device.
Alternatively, and again for example, the transmission unit 21 may be used in particular for
If the second condition is met, resetting second compression information of the uplink data; the second condition includes at least one of:
receiving a switching command;
when the switching completion message is sent;
after sending the switching completion message;
starting to send a specific data packet with SN x;
starting to send a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of a PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
there is no more data transmission with the source access network device.
In a specific implementation procedure, the second compression information of the header compression processing or the decompression processing may be transmitted after a Path Switch (Path Switch) procedure.
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, reference may be made to relevant contents in the embodiment corresponding to fig. 1, and details are not described here.
In this embodiment, in the handover process based on the eMBB, the terminal may simultaneously and respectively maintain the protocol stacks of the source access network device and the target access network device, and respectively correspond to different PDCP entities, that is, the first PDCP entity and the second PDCP entity, and may perform data transmission 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 PDCP entity of the second access network device by using the first PDCP entity of the terminal through the transmission unit, thereby implementing data transmission in the handover mode based on the eMBB.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (50)

  1. A method for transmitting data, comprising:
    in the switching process, the terminal utilizes the first PDCP entity of the terminal to carry out data transmission with the first PDCP entity of the first access network equipment or with the first PDCP entity of the first access network equipment and the second PDCP entity of the second access network equipment; wherein the content of the first and second substances,
    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 correspond to a second protocol stack.
  2. The method of 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 network device is a target access network device, and the second access network device is a source access network device.
  3. The method of claim 1, wherein the terminal performs data transmission with the first PDCP entity of the first access network device by using the first PDCP entity of the terminal, comprising:
    the terminal decompresses a first downlink data packet sent by the first access network equipment by using a first PDCP entity of the terminal; the first downlink data packet is obtained by performing header compression processing on first downlink data by a first PDCP entity of the first access network device; and/or
    The terminal decompresses a second downlink data packet sent by the second access network equipment by using a first PDCP entity of the terminal; and the second downlink data packet is obtained by performing header compression processing on second downlink data by the first PDCP entity of the first access network device and is sent to the second access network device.
  4. The method of claim 3, wherein the terminal performs data transmission with the first PDCP entity of the first access network device using the first PDCP entity of the terminal, further comprising:
    the terminal sends first uplink feedback information to the first access network equipment, wherein the first uplink feedback information comprises uplink feedback information of the first downlink data packet and/or uplink feedback information of the second downlink data packet; and/or
    And the terminal sends second uplink feedback information to the second access network equipment, wherein the second uplink feedback information comprises the uplink feedback information of the first downlink data packet and/or the uplink feedback information of the second downlink data packet, so that the second access network equipment sends the second uplink feedback information to the first access network equipment.
  5. The method of claim 1, wherein the terminal performs data transmission with the first PDCP entity of the first access network device by using the first PDCP entity of the terminal, comprising:
    the terminal performs header compression processing on first uplink data by using a first PDCP entity of the terminal to obtain a first uplink data packet, and sends the first uplink data packet to the first access network equipment, so that the first access network equipment decompresses the first uplink data packet by using the first PDCP entity of the first access network equipment; and/or
    The terminal performs header compression processing on second uplink data by using a first PDCP entity of the terminal to obtain a second uplink data packet, and sends the second uplink data packet to the second access network device, and the second uplink data packet is sent to the first access network device by the second access network device, so that the first access network device decompresses the second uplink data packet by using the first PDCP entity of the first access network device.
  6. The method of claim 5, wherein the terminal performs data transmission with the first PDCP entity of the first access network device using the first PDCP entity of the terminal, further comprising:
    the terminal receives first downlink feedback information sent by the first access network device, wherein the first downlink feedback information comprises 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 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
    And the terminal receives second downlink feedback information sent by the second access network equipment, wherein the second downlink feedback information comprises 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 is generated for the second access network equipment or generated for the first access network equipment and sent to the second access network equipment.
  7. The method of claim 5, wherein after the terminal performs data transmission with the first PDCP entity of the first access network device using the first PDCP entity of the terminal, 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 a 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, so that the second access network device sends the first uplink data packet and/or the second uplink data packet after decompression processing to the core network device.
  8. The method according to any of claims 3 to 7, wherein the terminal performs data transmission with the first PDCP entity of the first access network device by using the first PDCP entity of the terminal, further comprising:
    and the first access network equipment receives first compressed information which is subjected to header compression processing or decompression processing and sent by the second access network equipment.
  9. The method according to claim 8, wherein the first compressed information of the header compression processing or decompression processing is transmitted in units of resource blocks.
  10. The method according to claim 8, wherein the first compressed information of the header compression processing or decompression processing is carried in a handover request or a handover command.
  11. The method according to any of claims 3 to 7, wherein the terminal performs data transmission with the first PDCP entity of the first access network device by using the first PDCP entity of the terminal, further comprising:
    the terminal resets the first compressed information.
  12. The method of claim 11, wherein the terminal resets the first compressed information, comprising:
    if the first condition is met, the terminal resets first compression information of downlink data; the first condition includes at least one of:
    receiving a switching command;
    starting with the receipt of a particular data packet having an SN x;
    receiving a data packet with an End-marker indication;
    receiving specific indication information in a PDU header of a PDCP entity;
    receiving path conversion completion indication information;
    when releasing the protocol stack corresponding to the source access network equipment; and
    when no data transmission exists between the source access network equipment and the source access network equipment;
    if the second condition is met, the terminal resets the first compression information of the uplink data; the second condition includes at least one of:
    receiving a switching command;
    when the switching completion message is sent;
    after sending the switching completion message;
    starting to send a specific data packet with SN x;
    starting to send a data packet with an End-marker indication;
    transmitting specific indication information in a PDU header of a PDCP entity;
    receiving path conversion completion indication information;
    releasing a protocol stack corresponding to the source access network equipment; and
    there is no more data transmission with the source access network device.
  13. The method according to claim 8, wherein the first compressed information of the header compression processing or decompression processing is transmitted after the path switching process.
  14. The method of claim 1, wherein the terminal performs data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device by using the first PDCP entity of the terminal, and wherein the method comprises:
    the terminal decompresses a third downlink data packet sent by the first access network equipment by using a first PDCP entity of the terminal; the third downlink data packet is obtained by performing header compression processing on third downlink data by the first PDCP entity of the first access network device, or is obtained by performing header compression processing on third downlink data by the second PDCP entity of the second access network device and is sent to the first access network device; and/or
    The terminal decompresses a fourth downlink data packet sent by the second access network equipment by using a first PDCP entity of the terminal; the fourth downlink data packet is obtained by performing header compression processing on fourth downlink data by the first PDCP entity of the first access network device and sending the fourth downlink data to the second access network device, or is obtained by performing header compression processing on fourth downlink data by the second PDCP entity of the second access network device.
  15. The method of claim 14, wherein the terminal performs data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device by using the first PDCP entity of the terminal, further comprising:
    the terminal sends third uplink feedback information to the first access network device, wherein the third uplink feedback information comprises uplink feedback information of the third downlink data packet and/or uplink feedback information of the fourth downlink data packet; and/or
    And the terminal sends fourth uplink feedback information to the second access network equipment, wherein the fourth uplink feedback information comprises the uplink feedback information of the third downlink data packet and/or the uplink feedback information of the fourth downlink data packet.
  16. The method of claim 15, wherein the terminal performs data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device by using the first PDCP entity of the terminal, further comprising:
    and the first access network equipment and the second access network equipment transmit the third uplink feedback information and/or the fourth uplink feedback information.
  17. The method of claim 1, wherein the terminal performs data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device by using the first PDCP entity of the terminal, and wherein the method comprises:
    the terminal performs header compression processing on third uplink data by using the first PDCP entity of the terminal to obtain a third uplink data packet, and sends the third uplink data packet to the first access network device, so that the first access network device decompresses the third uplink data packet by using the first PDCP entity of the first access network device, or the first access network device sends the third uplink data packet to the second access network device, and the second access network device decompresses the third uplink data packet by using the second PDCP entity of the second access network device; and/or
    The terminal performs header compression processing on fourth uplink data by using the first PDCP entity of the terminal to obtain a fourth uplink data packet, and sends the fourth uplink data packet to the second access network device, so that the second access network device decompresses the fourth uplink data packet by using the second PDCP entity of the second access network device, or the second access network device sends the fourth uplink data packet to the first access network device, and the first access network device decompresses the fourth uplink data packet by using the first PDCP entity of the first access network device.
  18. The method of claim 17, wherein the terminal performs data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device by using the first PDCP entity of the terminal, further comprising:
    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 downlink feedback information of the fourth uplink data packet, and 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
    And the terminal receives fourth downlink feedback information sent by the second access network equipment, wherein the fourth downlink feedback information comprises 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 is generated for the second access network equipment or generated for the first access network equipment and sent to the second access network equipment.
  19. The method of claim 17, wherein after the terminal performs data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device by using the first PDCP entity of the terminal, the method further comprises:
    the first access network device sends the decompressed third uplink data packet and/or the decompressed fourth uplink data packet to a core network device, or sends the decompressed third uplink data packet and/or the decompressed fourth uplink data packet to the second access network device, so that the second access network device sends the decompressed third uplink data packet and/or the decompressed fourth uplink data packet to the core network device; 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 the third uplink data packet and/or the fourth uplink data packet after decompression processing to the first access network device, so that the first access network device sends the third uplink data packet and/or the fourth uplink data packet after decompression processing to the core network device.
  20. The method according to any of claims 14 to 19, wherein the terminal performs data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device by using the first PDCP entity of the terminal, further comprising:
    and the first access network equipment and the second access network equipment transmit second compressed information of the header compression processing or decompression processing.
  21. The method according to claim 20, wherein the second compressed information of the header compression process or the header decompression process is transmitted in units of resource blocks.
  22. The method according to claim 20, wherein the second compressed information of the header compression processing or the decompression processing is carried in a handover request or a handover command.
  23. The method according to any of claims 14 to 19, wherein the terminal performs data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device by using the first PDCP entity of the terminal, further comprising:
    the terminal resets the second compressed information.
  24. The method of claim 23, wherein the terminal resets the second compressed information, comprising:
    if the first condition is met, the terminal resets second compression information of the downlink data; the first condition includes at least one of:
    receiving a switching command;
    starting with the receipt of a particular data packet having an SN x;
    receiving a data packet with an End-marker indication;
    receiving specific indication information in a PDU header of a PDCP entity;
    receiving path conversion completion indication information;
    when releasing the protocol stack corresponding to the source access network equipment; and
    when no data transmission exists between the source access network equipment and the source access network equipment;
    if the second condition is met, the terminal resets second compression information of the uplink data; the second condition includes at least one of:
    receiving a switching command;
    when the switching completion message is sent;
    after sending the switching completion message;
    starting to send a specific data packet with SN x;
    starting to send a data packet with an End-marker indication;
    transmitting specific indication information in a PDU header of a PDCP entity;
    receiving path conversion completion indication information;
    releasing a protocol stack corresponding to the source access network equipment; and
    there is no more data transmission with the source access network device.
  25. The method according to claim 20, wherein the second compressed information of the header compression process or the decompression process is transmitted after the path switching process.
  26. A terminal, comprising:
    a transmitting unit, configured to perform data transmission with a first PDCP entity of the first access network device or with the first PDCP entity of the first access network device and a second PDCP entity of the second access network device by using the first PDCP entity of the terminal in a handover process; wherein the content of the first and second substances,
    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 correspond to a second protocol stack.
  27. The terminal of 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 network device is a target access network device, and the second access network device is a source access network device.
  28. Terminal according to claim 26, characterized in that the transmission unit is specifically configured to
    Decompressing a first downlink data packet sent by the first access network equipment by using a first PDCP entity of the terminal; the first downlink data packet is obtained by performing header compression processing on first downlink data by a first PDCP entity of the first access network device; and/or
    Decompressing a second downlink data packet sent by the second access network device by using a first PDCP entity of the terminal; and the second downlink data packet is obtained by performing header compression processing on second downlink data by the first PDCP entity of the first access network device and is sent to the second access network device.
  29. The terminal of claim 28, wherein the transmission unit is further configured to transmit the data packet to the base station
    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
    And sending second uplink feedback information to the second access network equipment, wherein the second uplink feedback information comprises the uplink feedback information of the first downlink data packet and/or the uplink feedback information of the second downlink data packet, so that the second access network equipment sends the second uplink feedback information to the first access network equipment.
  30. Terminal according to claim 26, characterized in that the transmission unit is specifically configured to
    Performing header compression processing on first uplink data by using a first PDCP entity of the terminal to obtain a first uplink data packet, and sending the first uplink data packet to the first access network equipment, so that the first access network equipment decompresses the first uplink data packet by using the first PDCP entity of the first access network equipment; and/or
    And performing header compression processing on second uplink data by using a first PDCP entity of the terminal to obtain a second uplink data packet, sending the second uplink data packet to the second access network equipment, and sending the second uplink data packet to the first access network equipment by the second access network equipment, so that the first access network equipment decompresses the second uplink data packet by using the first PDCP entity of the first access network equipment.
  31. The terminal of claim 30, wherein the transmission unit is further configured to transmit the data packet to the base station
    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 feedback information of the second uplink data packet, and 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
    And receiving second downlink feedback information sent by the second access network device, where the second downlink feedback information includes 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 is generated for the second access network device, or generated for the first access network device and sent to the second access network device.
  32. The terminal of claim 30, wherein the first uplink data packet and/or the second uplink data packet after the decompression processing
    Sending, by the first access network device, to a core network device; and/or
    And the first access network equipment is sent to the second access network equipment, and the second access network equipment is sent to the core network equipment.
  33. A terminal according to any of claims 28 to 32,
    and the first compressed information subjected to header compression processing or decompression processing is sent to the first access network equipment by the second access network equipment.
  34. The terminal of claim 33, wherein the first compressed information of the header compression or decompression process is transmitted in units of resource blocks.
  35. The terminal of claim 33, wherein the first compressed information of the header compression process or the decompression process is carried in a handover request or a handover command.
  36. The terminal of any of claims 28 to 32, wherein the transmission unit is further configured to transmit the data packet to the mobile station via the wireless link
    Resetting the first compression information of the header compression processing or decompression processing.
  37. Terminal according to claim 36, wherein the transmission unit is specifically configured to
    If the first condition is met, resetting first compression information of the downlink data; the first condition includes at least one of:
    receiving a switching command;
    starting with the receipt of a particular data packet having an SN x;
    receiving a data packet with an End-marker indication;
    receiving specific indication information in a PDU header of a PDCP entity;
    receiving path conversion completion indication information;
    when releasing the protocol stack corresponding to the source access network equipment; and
    when no data transmission exists between the source access network equipment and the source access network equipment;
    if the second condition is met, resetting the first compression information of the uplink data; the second condition includes at least one of:
    receiving a switching command;
    when the switching completion message is sent;
    after sending the switching completion message;
    starting to send a specific data packet with SN x;
    starting to send a data packet with an End-marker indication;
    transmitting specific indication information in a PDU header of a PDCP entity;
    receiving path conversion completion indication information;
    releasing a protocol stack corresponding to the source access network equipment; and
    there is no more data transmission with the source access network device.
  38. The terminal of claim 33, wherein the first compressed information of the header compression process or the decompression process is transmitted after the path switching process.
  39. Terminal according to claim 26, characterized in that the transmission unit is specifically configured to
    Decompressing a third downlink data packet sent by the first access network device by using a first PDCP entity of the terminal; the third downlink data packet is obtained by performing header compression processing on third downlink data by the first PDCP entity of the first access network device, or is obtained by performing header compression processing on third downlink data by the second PDCP entity of the second access network device and is sent to the first access network device; and/or
    Decompressing a fourth downlink data packet sent by the second access network device by using the first PDCP entity of the terminal; the fourth downlink data packet is obtained by performing header compression processing on fourth downlink data by the first PDCP entity of the first access network device and sending the fourth downlink data to the second access network device, or is obtained by performing header compression processing on fourth downlink data by the second PDCP entity of the second access network device.
  40. The terminal of claim 39, wherein the transmission unit is further configured to transmit the data packet to the base station
    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
    And 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.
  41. The terminal of claim 40, wherein the third uplink feedback information and/or the fourth uplink feedback information is transmitted between the first access network device and the second access network device.
  42. Terminal according to claim 26, characterized in that the transmission unit is specifically configured to
    Performing header compression processing on third uplink data by using a first PDCP entity of the terminal to obtain a third uplink data packet, and sending the third uplink data packet to the first access network device, so that the first access network device decompresses the third uplink data packet by using the first PDCP entity of the first access network device, or the first access network device sends the third uplink data packet to the second access network device, and the second access network device decompresses the third uplink data packet by using a second PDCP entity of the second access network device; and/or
    Performing header compression processing on fourth uplink data by using the first PDCP entity of the terminal to obtain a fourth uplink data packet, and sending the fourth uplink data packet to the second access network device, so that the second access network device decompresses the fourth uplink data packet by using the second PDCP entity of the second access network device, or sending the fourth uplink data packet to the first access network device by using the second PDCP entity of the first access network device, and decompressing the fourth uplink data packet by using the first PDCP entity of the first access network device by using the first access network device.
  43. The terminal of claim 42, wherein the transmission unit is further configured to transmit the data packet to the base station
    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, and 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 network device, where the fourth downlink feedback information includes 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 is generated for the second access network device, or generated for the first access network device and sent to the second access network device.
  44. The terminal according to claim 42, wherein the third upstream data packet and/or the fourth upstream data packet after the decompression processing
    The first access network equipment sends the information to core network equipment, or sends the information to the second access network equipment, and the second access network equipment sends the information to the core network equipment; and/or
    And the second access network device sends the information to the core network device, or sends the information to the first access network device, and the first access network device sends the information to the core network device.
  45. A terminal according to any of claims 39 to 44,
    and the second compressed information of the header compression processing or the header decompression processing is transmitted between the first access network equipment and the second access network equipment.
  46. The terminal of claim 45, wherein the second compressed information of the header compression or decompression process is transmitted in units of resource blocks.
  47. The terminal of claim 45, wherein the second compressed information of the header compression process or the decompression process is carried in a handover request or a handover command.
  48. A terminal according to any of claims 39 to 44, wherein the transmission unit is further adapted to transmit the data to the mobile station via the wireless link
    Resetting the second compression information.
  49. Terminal according to claim 48, wherein the transmission unit is specifically configured to
    If the first condition is met, the terminal resets second compression information of the downlink data; the first condition includes at least one of:
    receiving a switching command;
    starting with the receipt of a particular data packet having an SN x;
    receiving a data packet with an End-marker indication;
    receiving specific indication information in a PDU header of a PDCP entity;
    receiving path conversion completion indication information;
    when releasing the protocol stack corresponding to the source access network equipment; and
    when no data transmission exists between the source access network equipment and the source access network equipment;
    if the second condition is met, resetting second compression information of the uplink data; the second condition includes at least one of:
    receiving a switching command;
    when the switching completion message is sent;
    after sending the switching completion message;
    starting to send a specific data packet with SN x;
    starting to send a data packet with an End-marker indication;
    transmitting specific indication information in a PDU header of a PDCP entity;
    receiving path conversion completion indication information;
    releasing a protocol stack corresponding to the source access network equipment; and
    there is no more data transmission with the source access network device.
  50. The terminal of claim 45, wherein the second compressed information of the header compression process or the decompression process is transmitted after the path switching process.
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