CN112544104B - Data transmission method and terminal - Google Patents

Data transmission method and terminal Download PDF

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Publication number
CN112544104B
CN112544104B CN201880096335.4A CN201880096335A CN112544104B CN 112544104 B CN112544104 B CN 112544104B CN 201880096335 A CN201880096335 A CN 201880096335A CN 112544104 B CN112544104 B CN 112544104B
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China
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access network
network device
data packet
pdcp entity
terminal
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CN112544104A (en
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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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

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 maintain 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 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 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 procedure, the terminal and the access network device simultaneously maintain a set of protocol stacks and also correspond to only one packet data convergence protocol (Packet Data Convergence Protocol, PDCP) entity. The terminal either only maintains a protocol stack with the source access network device for data transmission with the source access network device or only maintains a protocol stack with the target access network device for data transmission with the target access network device.
In a New Radio (NR) system, for example, 5G application, a New handover method is proposed, which is based on an enhanced Make-before-break (eMBB) handover method to reduce the handover delay. In such an ebb-based handover procedure, the terminal may simultaneously maintain 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 needed to provide a data transmission method for realizing the data transmission in the ebb-based switching mode.
Disclosure of Invention
Aspects of the present invention provide a data transmission method and a terminal, which are used for implementing data transmission in an ebb-based switching manner.
In one aspect of the present invention, there is provided a data transmission method, including:
in the switching process, the terminal uses 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 first PDCP entity of the terminal is one PDCP entity of 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 transmission unit, configured to perform data transmission with a first PDCP entity of the first access network device or with a 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 procedure; wherein,
the first PDCP entity of the terminal is one PDCP entity of 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 present embodiment, in an ebb-based handover process, a terminal may simultaneously 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 ebb-based handover manner.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a data transmission method according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a terminal according to another embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Fig. 1 is a flow chart of a data transmission method according to an embodiment of the invention, as shown in fig. 1.
101. In the switching process, the terminal uses the first PDCP entity of the terminal to carry out 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.
Wherein,
the first PDCP entity of the terminal is one PDCP entity of 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.
The access network device according to the present invention may be an Evolved node b (eNB) in an Evolved universal mobile telecommunications system terrestrial radio access network (Evolved Universal Mobile Telecommunication System Territorial Radio Access Network, E-UTRAN), or a gcb which is a 5G base station in a Next Generation radio access network (Next Generation-Radio Access Network, NG-RAN), and the like, and the present embodiment is not particularly limited thereto.
The core network device according to the present invention may be a mobility management device, specifically, may be an access and mobility management function (Access and Mobility Management Function, AMF) in a 5G core network, i.e., a next generation core network (Next Generation Core Network, NGCN), or may be a mobility management entity (Mobility Management Entity, MME) in a 4G core network, i.e., an evolved packet core network (Evolved Packet Core Network, EPC), or the like, which is not particularly limited in this embodiment.
The core idea of the present invention is that in the handover process based on the eMBB, the terminal can simultaneously maintain protocol stacks of the source access network device and the target access network device respectively, and respectively correspond to different PDCP entities, namely a first PDCP entity and a second PDCP entity, and can perform data transmission with the first PDCP entity of the first access network device or 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 realizing data transmission in the handover mode based on the eMBB.
It should be noted that the present embodiment may be applied to a handover of a device between radio access networks of the same type, for example, in NG-RAN, from one gNB to another gNB, or, for another example, in E-UTRAN, from one eNB to another eNB, or may also be applied to a handover of a network between radio access networks of different types, for example, a handover from NG-RAN to E-UTRAN, or, for another example, a handover from E-UTRAN to NG-RAN, which is not particularly limited.
Alternatively, in one possible implementation manner of this embodiment, the first access network device may be a source access network device, 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 may be a source access network device, where this embodiment is not limited in particular.
Alternatively, in one possible implementation manner of this embodiment, in 101, the first PDCP entity of the terminal utilized by the terminal may be determined for the terminal according to an instruction of the first access network device or the second access network device, or may also be determined for the terminal according to pre-configured configuration information, which is not limited in this embodiment.
In the present invention, the terminal may simultaneously maintain a first protocol stack, which is a protocol stack of the first access network device, and a second protocol stack, which is a protocol stack of the second access network device, respectively, and correspond to different PDCP entities, i.e., a first PDCP entity and a second PDCP entity, respectively.
In the switching process, in a first data transmission mode, a terminal can specifically utilize one PDCP entity, namely a first PDCP entity, of two PDCP entities of the terminal to perform data transmission with the first PDCP entity of the first access network device; in the second data transmission manner, 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 the first PDCP entity, which is one of the two PDCP entities of the terminal.
In the first data transmission mode, the following transmission mode may be adopted for the downlink data transmission. Wherein, the header compression processing and decompression processing of the downlink data are involved.
The header compression process may be a robust header compression (Robust Header Compression, ROHC) process, or may be another header compression process, and the present embodiment is not particularly limited thereto.
The decompression process may be a decompression process corresponding to the ROHC process or a decompression process corresponding to another header compression process, and is not particularly limited in this embodiment as long as it corresponds to the header compression process used one by one.
Transmission mode a: the terminal may specifically perform decompression processing on the first downlink data packet sent by the first access network device by using the first PDCP entity of the terminal. 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.
Transmission mode B: the terminal may specifically perform decompression processing on the second downlink data packet sent by the second access network device by using the first PDCP entity of the terminal. The second downlink data packet may be obtained by performing header compression processing on the second downlink data for the first PDCP entity of the first access network device and sent 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.
Transmission mode C: and combining the transmission mode A and the transmission mode B to realize the transmission of 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 protocol data unit (Control PDU for interspersed ROHC feedback) of scattered robust header compression feedback, or may also be a control protocol data unit of 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 a 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 protocol data unit (Control PDU for interspersed ROHC feedback) of scattered robust header compression feedback, or may also be a control protocol data unit of 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 one possible implementation manner of this embodiment, in a first data transmission manner, the terminal may specifically adopt a combination of the technical solutions in the two implementation manners to transmit the first uplink feedback information and the second uplink feedback information.
In the first data transmission method, the following transmission method may be used for uplink data transmission. Wherein, the header compression processing and decompression processing of the uplink data are involved.
The header compression process may be a robust header compression (Robust Header Compression, ROHC) process, or may be another header compression process, and the present embodiment is not particularly limited thereto.
The decompression process may be a decompression process corresponding to the ROHC process or a decompression process corresponding to another header compression process, and is not particularly limited in this embodiment as long as it corresponds to the header compression process used one by one.
Transmission mode D: the terminal may specifically perform header compression processing on a first uplink data packet by using a first PDCP entity of the terminal, so as 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 may perform decompression processing on 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.
Transmission mode E: the terminal may specifically perform header compression processing on the second uplink data by using the first PDCP entity of the terminal, so as to obtain a second uplink data packet, and send the second uplink data packet to the second access network device, where the second access network device sends the second uplink data packet to the first access network device, so that the first access network device performs decompression processing on 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.
Transmission mode F: and combining the transmission mode D and the transmission mode E to realize the transmission of downlink data. At this time, after receiving the first upstream data packet and the second upstream data packet, the first network device may further perform a convergence (merge) process on the first upstream data packet and the second upstream data packet, and then perform a decompression process on the first upstream data packet and the second upstream data packet after the convergence process.
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 protocol data unit (Control PDU for interspersed ROHC feedback) of scattered robust header compression feedback, or may also be a control protocol data unit of other 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 protocol data unit (Control PDU for interspersed ROHC feedback) of scattered robust header compression feedback, or may also be a control protocol data unit of other 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 one possible implementation manner of this embodiment, in a first data transmission manner, the terminal may specifically adopt a combination of the technical solutions in the two implementation manners to transmit the first downlink feedback information and the second downlink feedback information.
In the first data transmission manner, after the first access network device performs decompression processing on the first uplink data packet and/or the second uplink data packet, the first access network device may send the first uplink data packet and/or the second uplink data packet after decompression processing directly to the 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 decompression processing to the core network device through the 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 decompression processing to the second access network device, so that the second access network device may send the first uplink data packet and/or the second uplink data packet after decompression processing to the core network device, or the first access network device may also combine the two methods to implement special limitation on this data transmission of the first uplink data packet and/or the second uplink data packet to this access network device, and this embodiment is not limited to this core network device.
Optionally, in a possible implementation manner of this embodiment, in a first data transmission manner, the first access network device may further receive first compression information of header compression processing or decompression processing sent by the second access network device, so as to use the first compression information of header compression processing or decompression processing adopted by 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.
In this implementation, the first compressed information may include, but is not limited to, at least one of the following:
context, sub-protocol identification (profile ID), sliding window, translation table (translation table), flag, and field.
In this implementation manner, the first compression information of the header compression process or decompression process may be transmitted in a transmission unit of a resource block, or may also be transmitted in a transmission unit of another resource unit, which is not particularly limited in this embodiment.
In a specific implementation process, the first compression information of the header compression process or decompression process may be specifically carried in a handover request, or may also be carried in a handover command, which is not particularly limited in this embodiment.
In this implementation, the terminal may further reset the first compressed information. Correspondingly, the first access network device also needs to reset the first compressed information to ensure synchronization between the terminal and the network side.
For example, if the first condition is satisfied, the terminal resets the first compression information of the downlink data; the first condition may include, but is not limited to, at least one of:
receiving a switching command;
a data packet with a specific Sequence Number (SN) of x is received;
receiving a data packet with an End-marker indication;
receiving specific indication information in a protocol data unit (Protocol Data Unit, PDU) header of the PDCP entity;
receiving path conversion completion indication information;
releasing a 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 satisfied, the terminal resets the first compression information of the uplink data; the second condition may include, but is not limited to, at least one of:
receiving a switching command;
when a switching completion message is sent;
after sending the switching completion message;
Starting to send a data packet with a specific SN of x;
transmitting a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network device; and
there is no longer data transmission with the source access network device.
In a specific implementation, the first compressed information of the header compression process or decompression process may be specifically transmitted after a Path Switch (Path Switch) process.
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 mode, the following transmission mode may be adopted for the downlink data transmission. Wherein, the header compression processing and decompression processing of the downlink data are involved.
The header compression process may be a robust header compression (Robust Header Compression, ROHC) process, or may be another header compression process, and the present embodiment is not particularly limited thereto.
The decompression process may be a decompression process corresponding to the ROHC process or a decompression process corresponding to another header compression process, and is not particularly limited in this embodiment as long as it corresponds to the header compression process used one by one.
Transmission scheme a': the terminal may specifically perform decompression processing on the third downlink data packet sent by the first access network device by using the first PDCP entity of the terminal; the third downlink data packet may be obtained by performing header compression processing on the third downlink data for the first PDCP entity of the first access network device, or may also be obtained by performing header compression processing on the third downlink data for the second PDCP entity of the second access network device and sent to the first access network device.
Transmission mode B': the terminal decompresses a fourth downlink data packet sent by the second access network device 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 packet 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.
Transmission scheme C': and combining the transmission mode A 'and the transmission mode B', and realizing the transmission of downlink data.
Optionally, in a possible implementation manner of this embodiment, in a 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 protocol data unit (Control PDU for interspersed ROHC feedback) of scattered robust header compression feedback, or may also be a control protocol data unit of 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 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 protocol data unit (Control PDU for interspersed ROHC feedback) of scattered robust header compression feedback, or may also be a control protocol data unit of 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 adopt a combination of the technical solutions in the two implementation manners to transmit the third uplink feedback information and the fourth uplink feedback information.
Optionally, in a possible implementation manner of this embodiment, in a 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 method, the following transmission method may be used for uplink data transmission. Wherein, the header compression processing and decompression processing of the uplink data are involved.
The header compression process may be a robust header compression (Robust Header Compression, ROHC) process, or may be another header compression process, and the present embodiment is not particularly limited thereto.
The decompression process may be a decompression process corresponding to the ROHC process or a decompression process corresponding to another header compression process, and is not particularly limited in this embodiment as long as it corresponds to the header compression process used one by one.
Transmission mode D': the terminal may specifically perform header compression processing on a third uplink data packet by using the first PDCP entity of the terminal, so as 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 may perform decompression processing on the third uplink data packet by using the first PDCP entity of the first access network device, or the first access network device may send the third uplink data packet to the second access network device, where the second access network device may perform decompression processing on the third uplink data packet by using the second PDCP entity of the second access network device
Transmission mode E': the terminal may specifically perform header compression processing on a fourth uplink data packet by using the first PDCP entity of the terminal, so as 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 may perform decompression processing on the fourth uplink data packet by using the second PDCP entity of the second access network device, or the second access network device may send the fourth uplink data packet to the first access network device, where the first access network device may perform decompression processing on the fourth uplink data packet by using the first PDCP entity of the first access network device
Transmission mode F': and combining the transmission mode D 'and the transmission mode E', and realizing the transmission of downlink data. At this time, after receiving the third upstream data packet and the fourth upstream data packet, the first network device may further perform a convergence (merge) process on the third upstream data packet and the fourth upstream data packet, and then perform a decompression process on the third upstream data packet and the fourth upstream data packet after the convergence process.
Transmission scheme G': and combining the transmission mode D 'and the transmission mode E', and realizing the transmission of downlink data. At this time, the first network device performs decompression processing after receiving the third uplink data packet, and the second network device performs decompression processing after receiving the fourth uplink data packet, and then the first network device or the second network device performs convergence processing on the third 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 protocol data unit (Control PDU for interspersed ROHC feedback) of scattered robust header compression feedback, or may also be a control protocol data unit of 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 protocol data unit (Control PDU for interspersed ROHC feedback) of the scattered robust header compression feedback, or may also be a control protocol data unit of 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 adopt a combination of the technical solutions in the two implementation manners to transmit the third downlink feedback information and the fourth downlink feedback information.
Optionally, in one possible implementation manner of this embodiment, after the first access network device performs decompression processing on the third upstream data packet and/or the fourth upstream data packet, the first access network device may send the third upstream data packet and/or the fourth upstream data packet after decompression processing directly to the core network device, or the first access network device may also send the third upstream data packet and/or the fourth upstream data packet after decompression processing to the core network device through the second access network device, that is, the first access network device may send the third upstream data packet and/or the fourth upstream data packet after decompression processing to the second access network device, so that the second access network device may send the third upstream data packet and/or the fourth upstream data packet after decompression processing to the core network device, or the first access network device may further send the third upstream data packet and/or the fourth upstream data packet after decompression processing to the core network device, and this may not specifically define two ways of implementing the decompression processing for this upstream data packet or the fourth access network device.
Optionally, in one possible implementation manner of this embodiment, after the second access network device performs decompression processing on the third upstream data packet and/or the fourth upstream data packet, the second access network device may send the third upstream data packet and/or the fourth upstream data packet after decompression processing directly to the core network device, or the second access network device may also send the third upstream data packet and/or the fourth upstream data packet after decompression processing to the core network device through the first access network device, that is, the second access network device may send the third upstream data packet and/or the fourth upstream data packet after decompression processing to the first access network device, so that the first access network device may send the third upstream data packet and/or the fourth upstream data packet after decompression processing to the core network device, or the second access network device may further send the third upstream data packet and/or the fourth upstream data packet after decompression processing to the core network device, and may not implement special limitation on this upstream data packet and/or the fourth upstream data packet after decompression processing.
Optionally, in a possible implementation manner of this embodiment, in a second data transmission manner, the first access network device and the second access network device may specifically adopt a combination of the two technical solutions in the foregoing two implementation manners, and send the third uplink data packet and/or the fourth uplink data packet after the decompression processing to a core network device.
For example, the first access network device and the second network device may send the third uplink data packet and/or the fourth uplink data packet after the decompression processing to a core network device, respectively.
Optionally, in a possible implementation manner of this embodiment, in a second data transmission manner, the first access network device may further transmit second compression information of the header compression process or the decompression process with the second access network device, so as to be compression information adopted by the first access network device and the second access network device in header compression process or decompression process.
In this implementation, the second compressed information may include, but is not limited to, at least one of the following:
context, sub-protocol identification (profile ID), sliding window, translation table (translation table), flag, and field.
In this implementation manner, the second compressed information of the header compression process or decompression process may be transmitted in a transmission unit of a resource block, or may also be transmitted in a transmission unit of another resource unit, which is not particularly limited in this embodiment.
In a specific implementation process, the second compressed information of the header compression process or decompression process 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 compression information of the header compression process or decompression process to the target access network device. And then, before the source access network equipment does not release the corresponding protocol stack, periodically interacting between the source access network equipment and the target access network equipment, or triggering the source access network equipment to interact.
In this implementation, the terminal may further reset the second compressed information. Accordingly, 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 satisfied, the terminal resets the second compressed information of the downlink data; the third condition may include, but is not limited to, at least one of:
receiving a switching command;
a data packet with a specific Sequence Number (SN) of x is received;
receiving a data packet with an End-marker indication;
receiving specific indication information in a protocol data unit (Protocol Data Unit, PDU) header of the PDCP entity;
receiving path conversion completion indication information;
releasing a 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 satisfied, the terminal resets the second compressed information of the uplink data; the fourth condition may include, but is not limited to, at least one of:
receiving a switching command;
when a switching completion message is sent;
after sending the switching completion message;
starting to send a data packet with a specific SN of x;
transmitting a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network device; and
There is no longer data transmission with the source access network device.
In a specific implementation, the second compressed information of the header compression process or decompression process may be specifically transmitted after a Path Switch (Path Switch) process.
In this embodiment, in the handover process based on the eMBB, the terminal may simultaneously maintain 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 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 the handover mode based on the eMBB.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present invention. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, 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, which 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 procedure.
Wherein the first PDCP entity of the terminal is one of 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.
The access network device according to the present invention may be an Evolved node b (eNB) in an Evolved universal mobile telecommunications system terrestrial radio access network (Evolved Universal Mobile Telecommunication System Territorial Radio Access Network, E-UTRAN), or a gcb which is a 5G base station in a Next Generation radio access network (Next Generation-Radio Access Network, NG-RAN), and the like, and the present embodiment is not particularly limited thereto.
The core network device according to the present invention may be a mobility management device, specifically, may be an access and mobility management function (Access and Mobility Management Function, AMF) in a 5G core network, i.e., a next generation core network (Next Generation Core Network, NGCN), or may be a mobility management entity (Mobility Management Entity, MME) in a 4G core network, i.e., an evolved packet core network (Evolved Packet Core Network, EPC), or the like, which is not particularly limited in this embodiment.
The core idea of the present invention is that in the handover process based on the eMBB, the terminal can simultaneously maintain protocol stacks of the source access network device and the target access network device respectively, and respectively correspond to different PDCP entities, namely a first PDCP entity and a second PDCP entity, and can perform data transmission with the first PDCP entity of the first access network device or 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 realizing data transmission in the handover mode based on the eMBB.
It should be noted that the present embodiment may be applied to a handover of a device between radio access networks of the same type, for example, in NG-RAN, from one gNB to another gNB, or, for another example, in E-UTRAN, from one eNB to another eNB, or may also be applied to a handover of a network between radio access networks of different types, for example, a handover from NG-RAN to E-UTRAN, or, for another example, a handover from E-UTRAN to NG-RAN, which is not particularly limited.
Alternatively, in one possible implementation manner of this embodiment, the first access network device may be a source access network device, 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 may be a source access network device, where this embodiment is not limited in particular.
Alternatively, in a possible implementation manner of this embodiment, the first PDCP entity of the terminal 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 maintain a first protocol stack, which is a protocol stack of the first access network device, and a second protocol stack, which is a protocol stack of the second access network device, respectively, and correspond to different PDCP entities, i.e., a first PDCP entity and a second PDCP entity, respectively.
Alternatively, in one possible implementation of the present embodiment, the transmission unit 21 may be specifically configured to
Decompressing a first downlink data packet sent by the first access network device 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; the first PDCP entity of the first access network equipment performs header compression processing on the second downlink data to obtain the second downlink data packet, and sends the second downlink data packet to the second access network equipment.
In this implementation, the transmission unit 21 may be further used for
Sending 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 sending second uplink feedback information to the second access network device, wherein the second uplink feedback information comprises 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.
Alternatively, in one possible implementation of the present embodiment, the transmission unit 21 may be specifically configured to
Performing header compression processing on a 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 device, so that the first access network device performs decompression processing on the first uplink data packet by using the first PDCP entity of the first access network device; and/or
And performing header compression processing on a second uplink data by using the 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 can perform decompression processing on 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 used for
Receiving 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 is 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, 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 device or is generated for the first access network device and sent to the second access network device.
In this implementation manner, the transmission unit 21 may be further 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 using the first access network device, or may also send the first uplink data packet to the second access network device by using the first access network device, or may send the first uplink data packet and/or the second uplink data packet to the core network device by using the second access network device, or may also send the first uplink data packet and/or the second uplink data packet to the core network device by using the two modes, where this embodiment is not limited in particular.
In this implementation, the first compressed information of the header compression process or decompression process may be sent by the second access network device to the first access network device.
In this implementation manner, the first compression information of the header compression process or decompression process may be transmitted in a transmission unit of a resource block, or may also be transmitted in a transmission unit of another resource unit, which is not particularly limited in this embodiment.
In a specific implementation process, the first compression information of the header compression process or decompression process may be specifically carried in a handover request, or may also be carried in a handover command, which is not particularly limited in this embodiment.
In this implementation, the transmission unit 21 may be further configured to reset the first compression information of the header compression process or decompression process. Correspondingly, the first access network device also needs to reset the first compressed information to ensure synchronization between the terminal and the network side.
For example, the transmission unit 21 may be used in particular for
Resetting the first compression information of the downlink data if the first condition is satisfied; the first condition includes at least one of:
receiving a switching command;
the data packet with the specific SN of x is received;
the method comprises the steps of receiving a data packet with an End-marker indication;
receiving specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
when there is no more data transmission with the source access network device.
Alternatively, for another 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 a switching completion message is sent;
after sending the switching completion message;
starting to send a data packet with a specific SN of x;
transmitting a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network device; and
there is no longer data transmission with the source access network device.
In a specific implementation, the first compressed information of the header compression process or decompression process may be specifically transmitted after a Path Switch (Path Switch) process.
Alternatively, in one possible implementation of the present 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 for a first PDCP entity of the first access network device, or is obtained by performing header compression processing on third downlink data for a second PDCP entity of the second access network device and is sent to the first access network device; and/or
Decompressing the 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 for the first PDCP entity of the first access network device and sent to the second access network device, or is obtained by performing header compression processing on fourth downlink data for the second PDCP entity of the second access network device.
In this implementation, the transmission unit 21 may be further used for
Transmitting 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 sending 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.
In particular, 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.
Alternatively, in one possible implementation of the present embodiment, the transmission unit 21 may be specifically configured to
Performing header compression processing on a third uplink data packet by using a first PDCP entity of the terminal, and sending the third uplink data packet to the first access network device for the first access network device to perform decompression processing on the third uplink data packet by using the first PDCP entity of the first access network device, or sending the third uplink data packet to the second access network device by using the first access network device, and performing decompression processing on the third uplink data packet by using the second PDCP entity of the second access network device by using the second access network device; and/or
And 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 for the second access network device to perform decompression processing on 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 access network device, and performing decompression processing on 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 used for
Receiving third downlink feedback information sent by the first access network device, wherein the third 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 third downlink feedback information is generated for the first access network device or is generated for the second access network device and sent to the first access network device; and/or
And receiving fourth downlink feedback information sent by the second access network device, 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 device or is generated for the first access network device and sent to the second access network device.
In this implementation manner, the third uplink data packet and/or the fourth uplink data packet after the decompression processing may be sent by the first access network device to a core network device, or sent by the second access network device to the core network device, or may also be sent by the second access network device to the core network device, or sent by the first access network device to the core network device, or may also be sent by both of the first access network device and the second access network device to the core network device, which is not limited in this embodiment specifically.
In this implementation, the second compressed information of the header compression process or decompression process may be transmitted between the first access network device and the second access network device.
In this implementation manner, the second compressed information of the header compression process or decompression process may be transmitted in a transmission unit of a resource block, or may also be transmitted in a transmission unit of another resource unit, which is not particularly limited in this embodiment.
In a specific implementation process, the second compressed information of the header compression process or decompression process 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 process or decompression process. Correspondingly, the first access network device and the second access network device also need to reset the second compressed information to ensure synchronization between the terminal and the network side.
For example, the transmission unit 21 may be used in particular for
If the first condition is met, the terminal resets the second compressed information of the downlink data; the first condition includes at least one of:
Receiving a switching command;
the data packet with the specific SN of x is received;
the method comprises the steps of receiving a data packet with an End-marker indication;
receiving specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
when there is no more data transmission with the source access network device.
Alternatively, for another example, the transmission unit 21 may be used in particular for
Resetting the second compressed information of the uplink data if the second condition is satisfied; the second condition includes at least one of:
receiving a switching command;
when a switching completion message is sent;
after sending the switching completion message;
starting to send a data packet with a specific SN of x;
transmitting a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network device; and
there is no longer data transmission with the source access network device.
In a specific implementation, the second compressed information of the header compression process or decompression process may be specifically transmitted after a Path Switch (Path Switch) process.
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. The detailed description may refer to the relevant content in the corresponding embodiment of fig. 1, and will not be repeated here.
In this embodiment, in the handover process based on the eMBB, the terminal may simultaneously maintain 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 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, so as to implement data transmission in the handover mode based on the eMBB.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the elements is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (42)

1. A method of transmitting data, comprising:
in the switching process, the terminal uses 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 first PDCP entity of the terminal is one PDCP entity of 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, the second PDCP entity of the terminal and the second PDCP entity of the second access network device correspond to a second protocol stack,
wherein the data transmission between the terminal and the first PDCP entity of the first access network device is performed by using the first PDCP entity of the terminal, including:
the terminal decompresses a first downlink data packet sent by the first access network device 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 the second downlink data packet sent by the second access network device by using the first PDCP entity of the terminal; wherein the second downlink data packet is obtained by performing header compression processing on the second downlink data by the first PDCP entity of the first access network device and is sent to the second access network device,
Wherein the data transmission between the terminal and the first PDCP entity of the first access network device and the second PDCP entity of the second access network device is performed by using the first PDCP entity of the terminal, including:
the terminal decompresses 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 for a first PDCP entity of the first access network device, or is obtained by performing header compression processing on third downlink data for a 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 device by using a first PDCP entity of the terminal; wherein the fourth downlink data packet is 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 packet to the second access network device, or is obtained by performing header compression processing on fourth downlink data for the second PDCP entity of the second access network device,
Wherein the data transmission between the terminal and the first PDCP entity of the first access network device is performed by using the first PDCP entity of the terminal, including:
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 device so that the first access network device can perform decompression processing on the first uplink data packet by using the first PDCP entity of the first access network device; and/or
The terminal uses the first PDCP entity of the terminal to perform header compression processing on a second uplink data packet to obtain a second uplink data packet, and sends the second uplink data packet to the second access network device, and the second access network device sends the second uplink data packet to the first access network device to allow the first access network device to perform decompression processing on the second uplink data packet by using the first PDCP entity of the first access network device,
wherein the data transmission between the terminal and the first PDCP entity of the first access network device and the second PDCP entity of the second access network device is performed by using the first PDCP entity of the terminal, including:
The terminal performs header compression processing on a third uplink data packet by using a first PDCP entity of the terminal, and sends the third uplink data packet to the first access network device, so that the first access network device performs decompression processing on 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 performs decompression processing on the third uplink data packet by using a second PDCP entity of the second access network device; and/or
The terminal performs header compression processing on a fourth uplink data packet by using a first PDCP entity of the terminal, and sends the fourth uplink data packet to the second access network device, so that the second access network device performs decompression processing on the fourth uplink data packet by using a 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 performs decompression processing on the fourth uplink data packet by using the first PDCP entity of the first access network device.
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 uses a first PDCP entity of the terminal to perform data transmission with a first PDCP entity of the first access network device, 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
The terminal sends second uplink feedback information to the second access network device, wherein the second uplink feedback information comprises 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.
4. The method of claim 1, wherein the terminal uses a first PDCP entity of the terminal to perform data transmission with a first PDCP entity of the first access network device, further comprising:
The terminal receives first downlink feedback information sent by the first access network device, 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 is generated for the second access network device and sent to the first access network device; or alternatively
The terminal receives second downlink feedback information sent by the second access network device, 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 device or is generated for the first access network device and sent to the second access network device.
5. The method of claim 1, wherein the terminal further comprises, after performing data transmission with the first PDCP entity of the first access network device using the first PDCP entity of the terminal:
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 alternatively
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.
6. The method according to any of claims 1-5, 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:
and the first access network equipment receives first compression information of header compression processing or decompression processing sent by the second access network equipment.
7. The method of claim 6, wherein the first compressed information of the header compression process or decompression process is transmitted in a resource block as a transmission unit.
8. The method of claim 6, wherein the first compressed information of the header compression process or decompression process is carried in a handover request or a handover command.
9. The method of claim 6, wherein the terminal uses a first PDCP entity of the terminal to perform data transmission with a first PDCP entity of the first access network device, further comprising:
The terminal resets the first compressed information.
10. The method of claim 9, wherein the terminal resetting the first compressed information comprises:
if the first condition is met, the terminal resets the first compression information of the downlink data; the first condition includes at least one of:
receiving a switching command;
the data packet with the specific SN of x is received;
the method comprises the steps of receiving a data packet with an End-marker indication;
receiving specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
when no data transmission exists with 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 a switching completion message is sent;
after sending the switching completion message;
starting to send a data packet with a specific SN of x;
transmitting a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
Releasing a protocol stack corresponding to the source access network device; and
there is no longer data transmission with the source access network device.
11. The method of claim 6, wherein the first compressed information of the header compression process or decompression process is transmitted after a path conversion process.
12. The method of claim 1, wherein the terminal uses a first PDCP entity of the terminal to perform data transmission with a first PDCP entity of the first access network device and a second PDCP entity of the second access network device, 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.
13. The method of claim 12, wherein the terminal uses a first PDCP entity of the terminal for data transmission with a first PDCP entity of the first access network device and a second PDCP entity of the second access network device, 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.
14. The method of claim 1, wherein the terminal uses a first PDCP entity of the terminal to perform data transmission with a first PDCP entity of the first access network device and a second PDCP entity of the second access network device, further comprising:
the terminal receives third downlink feedback information sent by the first access network device, wherein the third 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 third downlink feedback information is generated for the first access network device or is generated for the second access network device and sent to the first access network device; and/or
The terminal receives fourth downlink feedback information sent by the second access network device, 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 device or is generated for the first access network device and sent to the second access network device.
15. The method of claim 1, wherein the terminal further comprises, after performing data transmission with the first PDCP entity of the first access network device and the second PDCP entity of the second access network device using the first PDCP entity of the terminal:
the first access network device sends the third uplink data packet and/or the fourth uplink data packet after decompression processing to a core network device, or sends the third uplink data packet and/or the fourth uplink data packet after 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 decompression processing to the core network device; and/or
And 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.
16. The method according to any one of claims 1-8, 12-15, wherein the terminal uses a first PDCP entity of the terminal for data transmission with the first PDCP entity of the first access network device and a second PDCP entity of the second access network device, further comprising:
the first access network device and the second access network device transmit second compressed information of the header compression processing or decompression processing.
17. The method of claim 16, wherein the second compressed information of the header compression process or the decompression process is transmitted in a resource block as a transmission unit.
18. The method of claim 16, wherein the second compressed information of the header compression process or decompression process is carried in a handover request or a handover command.
19. The method of claim 16, the terminal performing data transmission with a first PDCP entity of the first access network device and a second PDCP entity of the second access network device using the first PDCP entity of the terminal, further comprising:
the terminal resets the second compressed information.
20. The method of claim 19, wherein the terminal resetting the second compressed information comprises:
If the first condition is met, the terminal resets the second compressed information of the downlink data; the first condition includes at least one of:
receiving a switching command;
the data packet with the specific SN of x is received;
the method comprises the steps of receiving a data packet with an End-marker indication;
receiving specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
when no data transmission exists with the source access network equipment;
if the second condition is met, the terminal resets the second compressed information of the uplink data; the second condition includes at least one of:
receiving a switching command;
when a switching completion message is sent;
after sending the switching completion message;
starting to send a data packet with a specific SN of x;
transmitting a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network device; and
there is no longer data transmission with the source access network device.
21. The method of claim 16, wherein the second compressed information of the header compression process or decompression process is transmitted after a path conversion process.
22. A terminal, comprising:
a transmission unit, configured to perform data transmission with a first PDCP entity of a first access network device or with a first PDCP entity of the first access network device and a second PDCP entity of a second access network device by using the first PDCP entity of the terminal in a handover procedure; wherein,
the first PDCP entity of the terminal is one PDCP entity of 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, the second PDCP entity of the terminal and the second PDCP entity of the second access network device correspond to a second protocol stack,
wherein, the transmission unit is specifically configured to:
decompressing a first downlink data packet sent by the first access network device 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; wherein the second downlink data packet is obtained by performing header compression processing on the second downlink data by the first PDCP entity of the first access network device and is sent to the second access network device,
Wherein, 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 for a first PDCP entity of the first access network device, or is obtained by performing header compression processing on third downlink data for a second PDCP entity of the second access network device and is sent to the first access network device; and/or
Decompressing the fourth downlink data packet sent by the second access network device by using the first PDCP entity of the terminal; wherein the fourth downlink data packet is 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 packet to the second access network device, or is obtained by performing header compression processing on fourth downlink data for the second PDCP entity of the second access network device,
wherein, the transmission unit is specifically configured to:
performing header compression processing on a 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 device, so that the first access network device performs decompression processing on the first uplink data packet by using the first PDCP entity of the first access network device; and/or
Header compression processing is performed on a second uplink data packet by using a first PDCP entity of the terminal, so as to obtain a second uplink data packet, the second uplink data packet is sent 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 can decompress the second uplink data packet by using a first PDCP entity of the first access network device,
wherein, the transmission unit is specifically configured to:
performing header compression processing on a third uplink data packet by using a first PDCP entity of the terminal, and sending the third uplink data packet to the first access network device for the first access network device to perform decompression processing on the third uplink data packet by using the first PDCP entity of the first access network device, or sending the third uplink data packet to the second access network device by using the first access network device, and performing decompression processing on the third uplink data packet by using the second PDCP entity of the second access network device by using the second access network device; and/or
And 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 for the second access network device to perform decompression processing on 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 access network device, and performing decompression processing on the fourth uplink data packet by using the first PDCP entity of the first access network device by using the first access network device.
23. The terminal of claim 22, 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.
24. The terminal of claim 22, wherein the transmission unit is further configured to
Sending 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 sending second uplink feedback information to the second access network device, wherein the second uplink feedback information comprises 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.
25. The terminal of claim 22, wherein the transmission unit is further configured to
Receiving 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 is 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, 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 device or is generated for the first access network device and sent to the second access network device.
26. The terminal according to claim 22, wherein the first upstream data packet and/or the second upstream data packet after the decompression process
Transmitting, by the first access network device, to a core network device; and/or
And the first access network equipment sends the data to the second access network equipment, and the second access network equipment sends the data to the core network equipment.
27. The terminal according to any of the claims 22-26, characterized in that,
the first compression information of the header compression processing or decompression processing is sent to the first access network device by the second access network device.
28. The terminal of claim 27, wherein the first compressed information of the header compression process or decompression process is transmitted in a resource block as a transmission unit.
29. The terminal of claim 27, wherein the first compressed information of the header compression process or decompression process is carried in a handover request or a handover command.
30. The terminal according to any of the claims 22-26, wherein the transmission unit is further adapted to
The first compression information of the header compression process or decompression process is reset.
31. Terminal according to claim 30, characterized in that the transmission unit is in particular adapted to
Resetting the first compression information of the downlink data if the first condition is satisfied; the first condition includes at least one of:
receiving a switching command;
the data packet with the specific SN of x is received;
the method comprises the steps of receiving a data packet with an End-marker indication;
receiving specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
when no data transmission exists with the source access network equipment;
resetting the first compression information of the uplink data if the second condition is satisfied; the second condition includes at least one of:
receiving a switching command;
when a switching completion message is sent;
after sending the switching completion message;
starting to send a data packet with a specific SN of x;
transmitting a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network device; and
there is no longer data transmission with the source access network device.
32. The terminal of claim 27, wherein the first compressed information of the header compression process or decompression process is transmitted after a path conversion process.
33. The terminal of claim 22, wherein the transmission unit is further configured to
Transmitting 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 sending 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.
34. The terminal according to claim 33, 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.
35. The terminal of claim 22, wherein the transmission unit is further configured to
Receiving third downlink feedback information sent by the first access network device, wherein the third 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 third downlink feedback information is generated for the first access network device or is generated for the second access network device and sent to the first access network device; and/or
And receiving fourth downlink feedback information sent by the second access network device, 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 device or is generated for the first access network device and sent to the second access network device.
36. The terminal according to claim 22, wherein the third upstream data packet and/or the fourth upstream data packet after the decompression process
The first access network equipment sends the data to core network equipment or the second access network equipment, and the second access network equipment sends the data to the core network equipment; and/or
And the second access network equipment sends the data to the core network equipment or the first access network equipment, and the first access network equipment sends the data to the core network equipment.
37. The terminal according to any of the claims 22-26, 33-36, characterized in that,
second compression information of the header compression process or decompression process is transmitted between the first access network device and the second access network device.
38. The terminal of claim 37, wherein the second compressed information of the header compression process or the decompression process is transmitted in a resource block as a transmission unit.
39. The terminal of claim 37, wherein the second compressed information of the header compression process or decompression process is carried in a handover request or a handover command.
40. The terminal of claim 37, wherein the transmission unit is further configured to reset the second compressed information.
41. The terminal of claim 40, wherein the transmission unit is specifically configured to
If the first condition is met, the terminal resets the second compressed information of the downlink data; the first condition includes at least one of:
receiving a switching command;
the data packet with the specific SN of x is received;
the method comprises the steps of receiving a data packet with an End-marker indication;
receiving specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network equipment; and
when no data transmission exists with the source access network equipment;
resetting the second compressed information of the uplink data if the second condition is satisfied; the second condition includes at least one of:
Receiving a switching command;
when a switching completion message is sent;
after sending the switching completion message;
starting to send a data packet with a specific SN of x;
transmitting a data packet with an End-marker indication;
transmitting specific indication information in a PDU header of the PDCP entity;
receiving path conversion completion indication information;
releasing a protocol stack corresponding to the source access network device; and
there is no longer data transmission with the source access network device.
42. The terminal of claim 37, wherein the second compressed information of the header compression process or decompression process is transmitted after a path conversion process.
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