CN108632933A - Data transmission method, device and user equipment - Google Patents
Data transmission method, device and user equipment Download PDFInfo
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- CN108632933A CN108632933A CN201710178216.0A CN201710178216A CN108632933A CN 108632933 A CN108632933 A CN 108632933A CN 201710178216 A CN201710178216 A CN 201710178216A CN 108632933 A CN108632933 A CN 108632933A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
- H04W36/023—Buffering or recovering information during reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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Abstract
A kind of data transmission method, device and user equipment, the data transmission method include：When cell switches or after the completion of switching, the traffic flow information belonging to the data packet transmitted not successfully is received；The reception state of traffic flow information and the data packet transmitted not successfully belonging to the data packet transmitted not successfully generates the state report for data flow, and is sent to target BS.The Lossless transport of switching evidence may be implemented in technical solution of the present invention.
Description
Technical field
The present invention relates to a kind of field of communication technology more particularly to data transmission method, device and user equipmenies.
Background technology
In the 5th third-generation mobile communication technology (5th-Generation, 5G), in order to realize control plane and user plane separation,
Business data packet can include service quality (Quality of Service, QoS) information of the business.For downlink, base station is received
After the data packet sent to core net, suitable scheduling strategy scheduling transmission resources are used according to QoS information wherein included,
Under conditions of meeting qos requirement, to deliver a packet to user equipment (User Equipment, UE).One UE can
Multiple business can be initiated, each business has specific QoS, and the QoS of different business can be identical, close or entirely different.
Each business can be referred to as a QoS data stream (Flow), base station can will have according to the dispatching algorithm of oneself it is identical or
The different Flow of close QoS are mapped on the same Data Radio Bearer (Data Radio Bearer, DRB), by QoS difference
Prodigious Flow is mapped on different DRB.At layer 2 (Layer 2), there are one the layers newly introduced dedicated for realizing that Flow is arrived
The mapping of DRB, the layer be located at Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) layer it
On, layer 2 have altogether four layers, the layer respectively newly introduced, PDCP layers, radio link control (Radio Link Control,
RLC) layer and medium access control (Medium Access Control, MAC) layer.
In switching, target BS may have different scheduling strategies from source base station, UE be established multiple
Flow can be mapped on different DRB by Flow, target BS, and as before switching, source base station maps Flow1 and Flow2
Onto DRB1, after switching, Flow1 is mapped to DRB1 by target BS, and Flow2 is mapped on DRB2.Usually switching
During need to ensure data it is complete, do not lose, such as the transmission for downlink data, source base station meeting in handoff procedure
The data packet that do not transmit is transmitted to target BS (to forward since the data packet of first not confirmed transmission success, with DRB
It is forwarded for granularity), UE can send PDCP state reports (PDCP Status to target BS after the handover
Report), such target BS may determine which data packet is properly received by UE, which data packet is not yet by UE
Be properly received, target BS transmits unacknowledged data packet to UE, UE receive after with the data packet sequencing that has received, then
Sequentially to the high-rise transmission data packet of UE, the switching of data lossless can be so realized.
But aforesaid way can only be directed to switching and map constant scene according to stream.If data flow maps when switching
It changes, whether for the data flow being mapped in new carrying, there is source base station before target BS cannot accurately know switching
The data packet that do not transmitted to UE, influences the experience of user at the phenomenon that may causing loss of data.
Invention content
Present invention solves the technical problem that being how to realize the Lossless transport of switching evidence.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of data transmission method, data transmission method includes：
When cell switches or after the completion of switching, the traffic flow information belonging to the data packet transmitted not successfully is received；According to
The reception state of traffic flow information and the data packet transmitted not successfully belonging to the data packet transmitted not successfully generates
For the state report of data flow, and it is sent to target BS.
Optionally, the traffic flow information received belonging to the data packet transmitted not successfully includes：Receiving source base station hair
When the switching command sent, the data flow letter belonging to the data packet transmitted not successfully that the source base station is sent is received together
Breath, wherein the source base station is to switch preceding base station, and target BS is base station after switching.
Optionally, the data transmission method further includes：When receiving the switching command that the source base station is sent, one
And receive the first mapping relations of the data flow and Data Radio Bearer after switching.
Optionally, the traffic flow information received belonging to the data packet transmitted not successfully includes：It is completed sending switching
After signaling, the traffic flow information belonging to the data packet transmitted not successfully that target BS is sent is received, wherein source base station is
Switch preceding base station, the target BS is base station after switching.
Optionally, the target BS first mapping relations described in explicit instruction in the switching request response.
Optionally, the traffic flow information belonging to the data packet transmitted not successfully and the failed transmission
The reception state of data packet generate the state report for data flow, and be sent to target BS and include：According to it is described not at
The reception state of traffic flow information and the data packet transmitted not successfully belonging to the data packet of work(transmission, which generates, is directed to data
The state report of stream；Traffic flow information belonging to the data packet transmitted not successfully and first mapping relations, really
The data flow mapped Data Radio Bearer of the data packet transmitted not successfully after fixed switching；To be mapped in same data without
The state report of the data flow of line carrying is sent to the target BS together.
Optionally, when the source base station receives after the switching request response that the target BS is sent, will described in not at
The data packet of work(transmission is forwarded to the target BS.
Optionally, the data packet transmitted not successfully is forwarded to the target BS by the source base station together；Alternatively,
The data packet transmitted not successfully in same data flow is forwarded to the target BS by the source base station together.
Optionally, the target BS determines failed after receiving the state report according to the state report
The data packet of reception, and the data packet being not successfully received is sent, the data packet being not successfully received is described
At least part for the data packet transmitted not successfully.
Optionally, the data transmission method further includes：When data packet sequence row number is discontinuous in each data flow, connecing
When the data packet being not successfully received described in receipts, the traffic flow information belonging to the data packet being not successfully received and data packet
Sequence number adjustment receives window.
Optionally, when the target BS is sent the data packet being not successfully received or new data packets,
In each data flow, after the data packet of the maximum sequence number of successful reception, the data of the maximum sequence number are sequentially transmitted
Data packet after packet；Alternatively, the target BS sends the data packet being not successfully received or new data packets
When, in the data packet transmitted not successfully, after the data packet of the maximum sequence number of successful reception, sequentially described in transmission
Data packet after the data packet of maximum sequence number.
Optionally, when the source base station sends switching request to the target BS, the data flow before explicit instruction switching
With the second mapping relations of Data Radio Bearer.
Optionally, the data packet transmitted not successfully includes the data packet and the source base station that the source base station is not sent
It sends and does not receive the data packet for confirming feedback.
In order to solve the above technical problems, the embodiment of the invention also discloses a kind of data transmission device, data transmission device
Including：
Traffic flow information receiving module is suitable for when cell switches or after the completion of switching, receives the data transmitted not successfully
Traffic flow information belonging to packet；State report sending module, suitable for the data belonging to the data packet transmitted not successfully
The reception state of stream information and the data packet transmitted not successfully generates the state report for data flow, and is sent to target
Base station.
Optionally, the traffic flow information receiving module includes：First traffic flow information receiving unit is suitable in the source of reception
When the switching command that base station is sent, the data belonging to the data packet transmitted not successfully that the source base station is sent are received together
Stream information, wherein the source base station is to switch preceding base station, and target BS is base station after switching.
Optionally, the traffic flow information receiving module further includes：First receiving unit is suitable for receiving the source base station
When the switching command sent, the first mapping relations of data flow and Data Radio Bearer after switching are received together.
Optionally, the traffic flow information receiving module includes：Second traffic flow information receiving unit, suitable for being cut in transmission
It changes after completing signaling, receives the traffic flow information belonging to the data packet transmitted not successfully that target BS is sent, wherein source
Base station is to switch preceding base station, and the target BS is base station after switching.
Optionally, the source base station receives institute together when receiving the switching request response that the target BS is sent
State first mapping relations of target BS transmission.
Optionally, the target BS first mapping relations described in explicit instruction in the switching request response.
Optionally, the state report sending module includes：State report generation unit is suitable for according to the failed biography
The reception state of traffic flow information and the data packet transmitted not successfully belonging to defeated data packet is generated for data flow
State report；Data Radio Bearer determination unit, suitable for the traffic flow information belonging to the data packet transmitted not successfully
With first mapping relations, determine that the data flow mapped data of the data packet transmitted not successfully after switching wirelessly are held
It carries；State report transmission unit, suitable for the state report for being mapped in the data flow of same Data Radio Bearer to be sent to together
The target BS.
Optionally, when the source base station receives after the switching request response that the target BS is sent, will described in not at
The data packet of work(transmission is forwarded to the target BS.
Optionally, the data packet transmitted not successfully is forwarded to the target BS by the source base station together；Alternatively,
The data packet transmitted not successfully in same data flow is forwarded to the target BS by the source base station together.
Optionally, the target BS determines failed after receiving the state report according to the state report
The data packet of reception, and the data packet being not successfully received is sent, the data packet being not successfully received is described
At least part for the data packet transmitted not successfully.
Optionally, the data transmission device further includes：Window adjustment module is received, the data in each data flow are suitable for
When packet number is discontinuous, when the data packet being not successfully received described in reception, according to the data packet institute being not successfully received
Traffic flow information and data the packet number adjustment of category receive window.
Optionally, when the target BS is sent the data packet being not successfully received or new data packets,
In each data flow, after the data packet of the maximum sequence number of successful reception, the data of the maximum sequence number are sequentially transmitted
Data packet after packet；Alternatively, the target BS sends the data packet being not successfully received or new data packets
When, in the data packet transmitted not successfully, after the data packet of the maximum sequence number of successful reception, sequentially described in transmission
Data packet after the data packet of maximum sequence number.
Optionally, when the source base station sends switching request to the target BS, the data flow before explicit instruction switching
With the second mapping relations of Data Radio Bearer.
Optionally, the data packet transmitted not successfully includes the data packet and the source base station that the source base station is not sent
It sends and does not receive the data packet for confirming feedback
In order to solve the above technical problems, the embodiment of the invention also discloses a kind of user equipment, the user equipment includes
The data transmission device.
The embodiment of the invention also discloses a kind of data transmission method, data transmission method includes：
When receiving switching request, the second mapping relations of the data flow and Data Radio Bearer before switching are obtained；
After the switching completion signaling for receiving user equipment transmission, the state for the data packet transmitted not successfully that user equipment is sent is received
Report；According to the first mapping relations of data flow and Data Radio Bearer after switching, second mapping relations and the shape
State report determines the reception state of the data packet transmitted not successfully.
Optionally, the data transmission method further includes：The data packet being not successfully received is determined according to the reception state,
The data packet being not successfully received is at least part of the data packet transmitted not successfully；It is not successfully received described
Data packet is sent to the user equipment.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that：
Technical solution of the present invention receives the number belonging to the data packet transmitted not successfully when cell switches or after the completion of switching
According to stream information；Traffic flow information and the data packet transmitted not successfully belonging to the data packet transmitted not successfully
Reception state generates the state report for data flow, and is sent to target BS.Technical solution of the present invention is by informing user
The traffic flow information belonging to data packet that equipment is transmitted not successfully, then user equipment can accordingly generate the state for data flow
Report, and it is sent to target BS；So that the target BS after switching can know the practical reception number of user equipment
According to the state of packet, and then the data packet that user equipment does not receive accurately can be sent to user in subsequent step and set
It is standby, it realizes the Lossless transport of switching evidence, avoids data-bag lost, improve user experience.
Further, when receiving the switching command that source base station is sent, receive that the source base station sends together it is described not
Traffic flow information belonging to the data packet of Successful transmissions, wherein the source base station is to switch preceding base station, and target BS is after switching
Base station.User equipment, when receiving the switching command that source base station is sent, connects together in handoff procedure in technical solution of the present invention
The traffic flow information belonging to the data packet transmitted not successfully is received, to save signaling overheads.
Further, after sending switching and completing signaling, the data transmitted not successfully that target BS is sent are received
Traffic flow information belonging to packet, wherein source base station is to switch preceding base station, and the target BS is base station after switching.Skill of the present invention
User equipment receives the number belonging to the data packet transmitted not successfully that target BS is sent after the completion of switching in art scheme
According to stream information；By the interaction between target BS and user equipment, base station can be improved to avoid the resource of source base station is occupied
Communication efficiency.
Description of the drawings
Fig. 1 is a kind of flow chart of data transmission method of the embodiment of the present invention；
Fig. 2 is the flow chart of another kind data transmission method of the embodiment of the present invention；
Fig. 3 is the flow chart of another data transmission method of the embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of data transmission device of the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of another kind data transmission device of the embodiment of the present invention.
Specific implementation mode
As described in the background art, aforesaid way can only be directed to switching according to the constant field of stream mapping in the prior art
Scape.If data flow mapping changes when switching, for the data flow being mapped in new carrying, target BS cannot be accurate
The phenomenon that whether preceding source base station of switching has the data packet that do not transmitted to UE, may cause loss of data known, the body of user is influenced
It tests.
Technical solution of the present invention is then used by informing the traffic flow information belonging to data packet that user equipment transmits not successfully
Family equipment can accordingly generate the state report for data flow, and be sent to target BS；So that after switching
Target BS can know the state of the practical received data packet of user equipment, and then can be in subsequent step accurately by user
The data packet that equipment does not receive is sent to user equipment, realizes the Lossless transport of switching evidence, avoids data-bag lost,
Improve user experience.
To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Fig. 1 is a kind of flow chart of data transmission method of the embodiment of the present invention.
Data transmission method in the present embodiment can be applied in user equipment side.
Data transmission method shown in FIG. 1 may comprise steps of：
Step S101：When cell switches or after the completion of switching, the data flow belonging to the data packet transmitted not successfully is received
Information；
Step S102：It traffic flow information belonging to the data packet transmitted not successfully and described transmits not successfully
The reception state of data packet generates the state report for data flow, and is sent to target BS.
In specific implementation, when cell switching occurs, the base station of user equipment access is switched to target BS from source base station.
In step S101, when cell switches or after the completion of switching, the traffic flow information belonging to the data packet transmitted not successfully is received.
For example, the corresponding PDCP sequence numbers of the data packet transmitted not successfully (sequence number, SN) be respectively 21,22,23 to
40, wherein the traffic flow information belonging to the data packet of singular sequence number is Flow1, the number belonging to the data packet of even numbers sequence number
It is Flow2 according to stream information.Then user equipment needs the traffic flow information belonging to the data packet transmitted not successfully that receives can be,
The data packet sequence row number that Flow1 is transmitted not successfully is 21,23,25,27,29,31,33,35,37,39；Flow2 is transmitted not successfully
Data packet sequence row number be 22,24,26,28,30,32,34,36,38,40.
It will be apparent to a skilled person that the sequence number of data packet can in middle difference Flow in practical application scene
With it is continuous, can not also be continuous.
Further, the traffic flow information belonging to data packet transmitted not successfully can be that source base station is sent, can also
It is that target BS is sent.I.e. source base station or target BS need number in sequence number and Flow2 by data packet in Flow1
It is sent to UE according to the sequence number of packet.
Further, the data packet transmitted not successfully may include data packet that the source base station is not sent and described
Source base station sends and does not receive the data packet for confirming feedback.Specifically, failed transmission is for source base station, wherein not
May include that UE has been received but source base station can't confirm the data packets of Successful transmissions in the data packet of Successful transmissions.
In specific implementation, in step s 102, user equipment can be according to belonging to the data packet transmitted not successfully
The reception state of traffic flow information and the data packet transmitted not successfully generates the state report for data flow.It is specific and
Speech, the reception state of the data packet transmitted not successfully can indicate whether UE receives the data packet.The state report
Can be PDCP state reports.
For example, being respectively 21,22,23 to 40 data packet transmitted not successfully for PDCP sequence numbers, UE has succeeded
The data packet for having received Serial No. 24,25,28,29, then UE can according to belonging to different data packet traffic flow information and
The packet information (Serial No. 24,25,28,29) having been received, state report is generated for Flow1 and Flow2 respectively；
For the data packet of Serial No. in Flow1 21,23,25,27,29,31,33,35,37,39, indicate respectively 0,0,1,0,1,0,
0,0,0,0 (0 indicates not receive, and 1 indicates to have been received by), sequentially to indicate whether to receive data packet；Similarly, for Flow2
The data packet of middle Serial No. 22,24,26,28,30,32,34,36,38,40, indicates respectively 0,1,0,1,0,0,0,0,0,0,
Sequentially to indicate whether to receive data packet.
In step s 102, user equipment will be sent to target BS for the state report of data flow.Make target base
The data packet that user equipment is really received and do not received can be gone out according to the state report judging for data flow by standing, in turn
The data packet not received is retransmited to the loss for avoiding data packet to the user equipment, while being avoided paid-in number
It is sent to user equipment again to save wireless transmission resources according to packet.
It should be noted that the data transmission method of the present embodiment can be used for following scene：It is reflected compared to source base station side
Multiple data flows are mapped to more Data Radio Bearer by the Data Radio Bearer penetrated, target BS, for example, first 2 of switching
Data flow is mapped to a Data Radio Bearer, and 2 data flows are mapped to two Data Radio Bearer after switching.
The embodiment of the present invention is by informing the traffic flow information belonging to data packet that user equipment transmits not successfully, then user
Equipment can accordingly generate the state report for data flow, and be sent to target BS；So that the mesh after switching
Mark base station can know the state of the practical received data packet of user equipment, and then accurately can set user in subsequent step
The standby data packet not received is sent to user equipment, realizes the Lossless transport of switching evidence, avoids data-bag lost, carry
High user experience.
Fig. 2 is the flow chart of another kind data transmission method of the embodiment of the present invention.Data transmission method in the present embodiment
It can apply in user equipment side.
It will be apparent to a skilled person that the flow of cell switching may include steps of：UE is to source base station
Measurement report is sent, for example, the signal quality of Target cell is higher than the measurement report of scheduled thresholding.Source base station receives measurement report
After reporting to, handover decisions are made, switching request is sent to target BS.If target BS allows the access of UE, distributing
After necessary wireless parameter, switching request response is returned to source base station.After source base station receives switching request response, sent out to UE
It includes the wireless parameter that target BS is UE distribution to send switching command, switching command.Wireless parameter in UE foundation switching commands,
Target BS is accessed, sending switching to target BS completes signaling.
Data transmission method shown in Fig. 2 may comprise steps of：
Step S201：When receiving the switching command that source base station is sent, receive that the source base station sends together it is described not
Traffic flow information belonging to the data packet of Successful transmissions；
Step S202：When receiving the switching command that the source base station is sent, the data flow after switching is received together
With the first mapping relations of Data Radio Bearer；
Step S203：It traffic flow information belonging to the data packet transmitted not successfully and described transmits not successfully
The reception state of data packet generates the state report for data flow；
Step S204：Traffic flow information and first mapping belonging to the data packet transmitted not successfully close
System determines the data flow mapped Data Radio Bearer of the data packet transmitted not successfully after switching；
Step S205：The state report for the data flow for being mapped in same Data Radio Bearer is sent to the target together
Base station.
In specific implementation, in step s 201, user equipment can be received when receiving the switching command that source base station is sent
The traffic flow information belonging to the data packet transmitted not successfully that the source base station is sent, saving signaling expense.
In specific implementation, in step S202, user equipment can may be used also when receiving the switching command that source base station is sent
To receive the first mapping relations of data flow and Data Radio Bearer after switching.Specifically, the first mapping relations can be with table
Show the mapping relations in target BS side data stream and Data Radio Bearer.That is, before step S202, target BS
The first mapping relations are sent to source base station, so that source base station can order the first mapping relations by switching
Order is sent to user equipment.
Preferably, the source base station receives institute together when receiving the switching request response that the target BS is sent
State first mapping relations of target BS transmission.In other words, before source base station sends switching command to user equipment, mesh
First mapping relations are sent to source base station by mark base station by switching request response.
Further, the target BS first mapping relations described in explicit instruction in the switching request response.
That is source base station directly can obtain the first mapping relations from switching request response, without others parsing operation, thus
It ensure that source base station can accurately and rapidly receive the first mapping relations.
Specifically, the wireless parameter that base station side is UE configurations is respectively positioned in the container (container) of an access layer,
It is not required to be appreciated that wireless parameter as the Xn interfaces between base station.If the first mapping relations are put into container by target BS,
In handoff procedure, source base station is needed through the protocol analysis position wireless heterogeneous networks (Radio Resource Control, RRC)
Then wireless parameter in container knows whether the mapping variation that Flow to DRB has occurred, source base station is caused to receive target base
When the switching request response stood by cannot be quickly identify whether to have occurred Flow to DRB mapping variation.Further, when source base
Stand the protocol version for belonging to different between target BS when, such as target BS be highest version base station, and source base station be it is low
The base station of version, at this time if target BS, which is UE, is configured with the wireless parameter that only highest version base station could be applicable in, source base
It stands when receiving the switching request response of target BS transmission, it is impossible to enough to identify whether that Flow to DRB mapping variations have occurred.
Therefore, the mapping relations (namely first for Flow to the DRB that target BS can be in switching request response after explicit instruction switching
Mapping relations).
In specific implementation, in step S203, user equipment can be according to belonging to the data packet transmitted not successfully
The reception state of traffic flow information and the data packet transmitted not successfully generates the state report for data flow.It is specific and
Speech, user equipment can will be sent directly to target BS for the state report of data flow.
Further, in step S204, user equipment can also according to the first mapping relations, determine after switching it is described not
The data flow mapped Data Radio Bearer of the data packet of Successful transmissions；Then in step S204, same number will be mapped in
It is sent to the target BS together according to the state report of the data flow of radio bearer.
It is described in detail with reference to specific example.Flow1 and Flow2 are mapped to by source base station before switching
DRB1；Flow1 and Flow2 are respectively mapped to DRB1 and DRB2 (namely first mapping relations) by target BS after switching.For
PDCP sequence numbers are respectively 21,22,23 to 40 data packet transmitted not successfully, wherein belonging to the data packet of singular sequence number
Traffic flow information be Flow1, the traffic flow information belonging to the data packet of even numbers sequence number is Flow2；UE successfully connects
The data packet of Serial No. 24,25,28,29 is received, then the state report that UE can respectively be generated for Flow1 and Flow2 is
0,0,1,0,1,0,0,0,0,0 and 0,1,0,1,0,0,0,0,0,0, sequentially to indicate whether to receive data packet.UE can be by needle
Target BS is sent to Flow1 and the Flow2 state report generated respectively.
In another non-limiting embodiment, Flow1, Flow2 and Flow3 are mapped to DRB1 by source base station before switching；
Flow1 and Flow2 are mapped to DRB1 by target BS after switching, and Flow3 is mapped to DRB2 (namely first mapping relations).UE
After generating the state report for Flow1, Flow2 and Flow3, determine that Flow1 and Flow2 reflect according to the first mapping relations
It is mapped to DRB1, then can will be directed to after Flow1 and Flow2 state reports merge and be sent to target BS.
Preferably, after source base station receives the switching request response that the target BS is sent, by the failed transmission
Data packet be forwarded to the target BS.Further, the data packet transmitted not successfully is forwarded to by source base station together
The target BS；Alternatively, the source base station forwards the data packet transmitted not successfully in same data flow together
To the target BS.Specifically, source base station can also indicate the corresponding sequence number of each data packet to target BS.
Further, the target BS is after receiving the state report, according to the state report determine not at
The data packet that work(receives, and the data packet being not successfully received is sent, the data packet being not successfully received is institute
State at least part for the data packet transmitted not successfully.For example, target BS is after receiving the state report for data flow,
It can determine in the data packet transmitted not successfully that PDCP sequence numbers are respectively 21,22,23 to 40, UE successfully has received
The data packet UE of the data packet of Serial No. 24,25,28,29, other sequences number is not successfully received namely Serial No. 21,22,
23,26,27,30 to 40 data packet UE is not successfully received, then target BS can send out the data packet of other sequences number again
It send to UE.Specifically, target BS can unwrap the number that transmission UE is not received successively that begins from unreceived first data of UE
According to packet, namely since the data packet of Serial No. 21, the data of Serial No. 21,22,23,26,27,30 to 40 are transmitted successively
Packet.
Preferably, data transmission method shown in Fig. 2 may include step S206：The sequence of data packet in each data flow
When number discontinuous, when the data packet being not successfully received described in reception, according to the number belonging to the data packet being not successfully received
Window is received according to stream information and the adjustment of data packet number.
Specifically, when target BS sends the data packet being not successfully received, for each data flow, number that UE is received
Sequence number according to packet can be discontinuous, and UE can receive window with active accommodation at this time, avoid waiting for being not belonging to this Flow's
The data packet of certain sequence numbers improves communication efficiency.For example, for Flow1, after the data packet for receiving sequence number 27, UE roots
According to the traffic flow information belonging to the data packet being not successfully received, it can know that the data packet of sequence number 28 belongs to Flow2, sequence number
29 data packet has received, and the data packet that next data packet received is sequence number 31, then can adjust reception window
The data packet of sequence number 31 is received, avoids waiting for the data packet of the data packet and sequence number 29 of sequence number 28.
Preferably, when the target BS is sent the data packet being not successfully received or new data packets,
In each data flow, after the data packet of the maximum sequence number of successful reception, the data of the maximum sequence number are sequentially transmitted
Data packet after packet；Alternatively, the target BS sends the data packet being not successfully received or new data packets
When, in the data packet transmitted not successfully, after the data packet of the maximum sequence number of successful reception, sequentially described in transmission
Data packet after the data packet of maximum sequence number.
Specifically, this Flow that target BS when sending the data packet being not successfully received, can have been received in UE
After the data packet of the maximum sequence number of (or DRB), the data packet after the data packet of maximum sequence number is sequentially transmitted.Example
Such as, Flow1 and Flow2 are respectively mapped to DRB1 and DRB2 by target BS；The maximal sequence being properly received for Flow1, UE
Number data packet be sequence number 29 data packet, then it is 30 that target BS, which compiles the data packet of former Serial No. 31, former sequence number
It is 31 to be transmitted for 33 data packet volume, subsequent data packet and so on, that is, restore sequentially to transmit.
Alternatively, target BS send be not successfully received data packet when, can be in the maximum sequence number that UE has been received
Data packet after (i.e. the data packet of maximum sequence number in the DRB that UE is received), sequentially transmit maximum sequence number data packet it
Data packet afterwards.For example, Flow1 and Flow2 (DRB1 for both mapping to target BS) in the DRB1 being properly received before UE switchings
Maximum sequence number data packet be sequence number 39 data packet, then target BS send Flow1 (being mapped to DRB1) and
It when the data packet of Flow2 (being mapped to DRB2), is sequentially transmitted after the data packet of sequence number 39, i.e. after the Flow
Data packet be all 40 to be transmitted by number, subsequent data packet, to restore sequentially to transmit.
Fig. 3 is the flow chart of another data transmission method of the embodiment of the present invention.
Data transmission method shown in Fig. 3 may comprise steps of：
Step S301：After sending switching and completing signaling, the data transmitted not successfully that target BS is sent are received
Traffic flow information belonging to packet, wherein source base station is to switch preceding base station, and the target BS is base station after switching；
In specific implementation, data flow and the first mapping relations of Data Radio Bearer are sent to by source base station after switching
UE.Specifically, user equipment can receive first mapping together and close when receiving the switching command that source base station is sent
System.
Step S302：It traffic flow information belonging to the data packet transmitted not successfully and described transmits not successfully
The reception state of data packet generates the state report for data flow；
Step S303：Traffic flow information and first mapping belonging to the data packet transmitted not successfully close
System determines the data flow mapped Data Radio Bearer of the data packet transmitted not successfully after switching；
Step S304：The state report for the data flow for being mapped in same Data Radio Bearer is sent to the target together
Base station；
Step S305：When data packet sequence row number is discontinuous in each data flow, the number that is not successfully received described in reception
When according to packet, traffic flow information and the adjustment of data packet number belonging to the data packet being not successfully received receive window.
In specific implementation, in step S301, user equipment can be completed in access target BS, namely sending switching
After signaling, the traffic flow information belonging to the data packet transmitted not successfully that target BS is sent is received.Namely per number
It is sent to user equipment according to the sequence number for flowing corresponding data packet.
Specifically, after UE receives the traffic flow information belonging to the data packet transmitted not successfully, according in source base station side
Receive the reception state of data packet, state report of the setting for data flow.Then it is sent to target BS for per number
According to the state report of stream.
It will be apparent to a skilled person that state report can be arranged with PDCP sequence numbers, therefore it is properly termed as
PDCP state reports, can also be any other enforceable title, and the embodiment of the present invention is without limitation.For example, newly drawing
The layer 2 entered can merge with PDCP, which can also accordingly change.
More contents of the specific implementation mode of step S302 to step S305 are referred to step S203 shown in Fig. 2
Associated description into step S206, which is not described herein again.
Preferably, when the source base station sends switching request to the target BS, the data flow before explicit instruction switching
With the second mapping relations of Data Radio Bearer.In other words, target BS is before receiving state report, before having learned that switching
Data flow and Data Radio Bearer the second mapping relations.Source base station can be sent the second mapping relations by switching request
To target BS.Then target BS can directly obtain the second mapping relations from switching request, without others parsing behaviour
Make, to ensure that target BS can be accurately received the second mapping relations.
Specifically, base station side be UE configuration wireless parameter be respectively positioned in the container of an access layer, as base station it
Between Xn interfaces be not required to be appreciated that wireless parameter.If the second mapping relations are put into container by source base station, in handoff procedure,
Target BS needs the wireless parameter being located at by RRC protocol analysis in container, then knows Flow to the DRB's of source base station side
Mapping relations cause target BS to receive mapping of the switching request response by identification source base station side Flow to DRB that cannot be quickly
Relationship.Further, when belonging to different protocol versions between source base station and target BS, then target BS is receiving source base
When the switching request sent of standing, it would be possible to can not identify Flow to the DRB mapping relations of source base station side.Therefore, source base station can
With the mapping relations (namely second mapping relations) of explicit instruction Flow to the DRB in switching request.Namely second mapping relations
It is not placed in the container of access layer.
More operation principles of the embodiment of the present invention, more contents of working method, the phase being referred in Fig. 1 to Fig. 2
Description is closed, which is not described herein again.
Fig. 4 is a kind of structural schematic diagram of data transmission device of the embodiment of the present invention.
Data transmission device 40 in the present embodiment can be used for user equipment side.
Data transmission device 40 shown in Fig. 4 may include that traffic flow information receiving module 401 and state report send mould
Block 402.
Wherein, traffic flow information receiving module 401 is suitable for when cell switches or after the completion of switching, receives failed transmission
Data packet belonging to traffic flow information.
State report sending module 402 is suitable for the traffic flow information belonging to the data packet transmitted not successfully and institute
The reception state for stating the data packet transmitted not successfully generates the state report for being directed to data flow, and is sent to target BS.
In specific implementation, traffic flow information receiving module 401 receives failed pass when cell switches or after the completion of switching
Traffic flow information belonging to defeated data packet.For example, the corresponding PDCP sequence numbers (sequence of the data packet transmitted not successfully
Number it is respectively) 21,22,23 to 40, wherein the traffic flow information belonging to the data packet of singular sequence number is Flow1, even numbers
Traffic flow information belonging to the data packet of sequence number is Flow2.
Further, the traffic flow information belonging to data packet transmitted not successfully can be that source base station is sent, can also
It is that target BS is sent.
Further, the data packet transmitted not successfully may include data packet that the source base station is not sent and described
Source base station sends and does not receive the data packet for confirming feedback.
In specific implementation, state report sending module 402 will be sent to target BS for the state report of data flow.Make
The number that user equipment is really received and do not received can be gone out according to the state report judging for data flow by obtaining target BS
According to packet, and then the data packet not received is retransmited to the loss that data packet is avoided to the user equipment.
The embodiment of the present invention is by informing the traffic flow information belonging to data packet that user equipment transmits not successfully, then user
Equipment can accordingly generate the state report for data flow, and be sent to target BS；So that the mesh after switching
Mark base station can know the state of the practical received data packet of user equipment, and then accurately can set user in subsequent step
The standby data packet not received is sent to user equipment, realizes the Lossless transport of switching evidence, avoids data-bag lost, carry
High user experience.
Operation principle, more contents of working method about the data transmission device 40, are referred to Fig. 1 to Fig. 3
In associated description, which is not described herein again.
In order to ensure the Lossless transport of data, the embodiment of the invention also discloses a kind of data transmission methods.The data
Transmission method can be used for target BS side.
The data transmission method may comprise steps of：
When receiving switching request, the second mapping relations of the data flow and Data Radio Bearer before switching are obtained；
After the switching completion signaling for receiving user equipment transmission, the state for the data packet transmitted not successfully that user equipment is sent is received
Report；According to the first mapping relations of data flow and Data Radio Bearer after switching, second mapping relations and the shape
State report determines the reception state of the data packet transmitted not successfully.
In the present embodiment, target BS can be according to the first mapping relations, second mapping relations and the state report
The practical reception state for determining user terminal to the data packet transmitted not successfully is accused, so as to accurately will in subsequent step
The data packet that user equipment does not receive is sent to user equipment, avoids data-bag lost, ensure that the Lossless transport of data.
Preferably, the data transmission method further includes：The data packet being not successfully received is determined according to the reception state,
The data packet being not successfully received is at least part of the data packet transmitted not successfully；It is not successfully received described
Data packet is sent to the user equipment.
In the present embodiment, UE can according to the second mapping relations of data flow and Data Radio Bearer before switching, and
State report is arranged in the reception state for the data packet transmitted not successfully, and sends the state report to target BS.Target BS
After receiving state report, the reception shape of the data packet transmitted not successfully is determined according to data packet sequence column information in data flow
State, for example, for Flow1, target BS knows that it includes the data packet of Serial No. odd number, i.e., sequence number 21,23,25,27,
29,31 data packet belongs to Flow1, while knowing that sequence number 25 and 29 data packet are successfully received, sequence number 21,23,
27,31 data packet is not successfully received.
In specific implementation, the data packet that do not transmit can be transmitted to mesh by source base station after receiving switching request response
Mark base station.Source base station can uniformly be transmitted to target BS, can also forward respective failed transmission respectively according to data flow
Data packet indicates the corresponding sequence number of each data packet to target BS, while to target BS.
Further, target BS can be by the data packet sequence row number notifying user equipment in each data flow.Also will
The data packet of sequence number 21,23,25,27,29,31 belongs to Flow1 notices UE.Target BS can also notify UE sequence numbers simultaneously
The received success of 25 and 29 data packet；Alternatively, target BS can also notify the number of UE sequence numbers 21,23,27,31 simultaneously
It is not successfully received according to packet, so that UE is in receipt of subsequent, the sequence of the data packet of the next receptions of the Flow can be accurately determined
Row number avoids unnecessary waiting, improves communication efficiency, improves user experience.
Optionally, target BS can also be by the data packet before the data packet for the maximum sequence number that user equipment receives
Affiliated traffic flow information notifying user equipment, after the data packet of the maximum sequence number of successful reception, sequentially described in transmission
Data packet after the data packet of maximum sequence number.For example, the data packet for the maximum sequence number that UE is received is sequence number 29
Data packet, then the data packet of target BS notice UE sequence numbers 21,23,25,27,29 belong to Flow1, no matter data packet exists later
The sequence number number of source base station side is how many, and target BS will be sequentially the package number of Flow1 according to sequence number 30,31,32.
Further, UE can receive the first mapping relations, and close according to the first mapping together when receiving switching command
System determines that the mapping of data flow and Data Radio Bearer after switching changes, at this point, UE still can be according to the number before switching
State report is generated according to the second mapping relations of stream and Data Radio Bearer.
It is understood that the state report can be PDCP state reports.
Fig. 5 is the structural schematic diagram of another kind data transmission device of the embodiment of the present invention
Data transmission device 50 shown in fig. 5 may include traffic flow information receiving module 501, state report sending module
502 and receive window adjustment module 503.
Specifically, traffic flow information receiving module 501 may include the first traffic flow information receiving unit 5011 and
One receiving unit 5012.Wherein, the first traffic flow information receiving unit 5011 is suitable in the switching command for receiving source base station transmission
When, the traffic flow information belonging to the data packet transmitted not successfully that the source base station is sent is received together, wherein the source
Base station is to switch preceding base station, and target BS is base station after switching.First receiving unit 5012 is suitable for receiving the source base station hair
When the switching command sent, the first mapping relations of data flow and Data Radio Bearer after switching are received together.
Traffic flow information receiving module 501 can also include the second traffic flow information receiving unit 5013.Wherein, the second number
It is suitable for after sending switching and completing signaling according to stream information receiving unit 5013, receives the failed transmission that target BS is sent
Data packet belonging to traffic flow information, wherein source base station is to switch preceding base station, and the target BS is base station after switching.
Specifically, state report sending module 502 may include state report generation unit 5021, Data Radio Bearer
Determination unit 5022 and state report transmission unit 5023.
Wherein, state report generation unit 5021 is suitable for the data flow letter belonging to the data packet transmitted not successfully
The reception state of breath and the data packet transmitted not successfully generates the state report for data flow；Data Radio Bearer determines
Unit 5022 is suitable for the traffic flow information belonging to the data packet transmitted not successfully and first mapping relations, determines
The data flow mapped Data Radio Bearer of the data packet transmitted not successfully after switching；State report transmission unit 5023
Suitable for the state report for being mapped in the data flow of same Data Radio Bearer is sent to the target BS together.
In specific implementation, receives window adjustment module 503 and is suitable for when data packet sequence row number is discontinuous in each data flow,
When the data packet being not successfully received described in reception, according to the traffic flow information sum number belonging to the data packet being not successfully received
It is adjusted according to packet number and receives window.
The embodiment of the present invention is by informing the traffic flow information belonging to data packet that user equipment transmits not successfully, then user
Equipment can accordingly generate the state report for data flow, and be sent to target BS；So that the mesh after switching
Mark base station can know the state of the practical received data packet of user equipment, and then accurately can set user in subsequent step
The standby data packet not received is sent to user equipment, realizes the Lossless transport of switching evidence, avoids data-bag lost, carry
High user experience.
Operation principle, more contents of working method about the data transmission device 50, are referred to Fig. 1 to Fig. 4
In associated description, which is not described herein again.
The embodiment of the invention also discloses a kind of user equipment, the user equipment includes data transmission dress shown in Fig. 4
Set 40 or shown in fig. 5 data transmission devices 50.Data transmission device 40 or data transmission device 50 can be internally integrated in or
Outside is coupled to the user equipment, and the user equipment can execute the front and back data transmission of cell switching.User's packet
Include but be not limited to mobile phone, tablet computer, computer.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in computer readable storage medium, to store
Medium may include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (29)
1. a kind of data transmission method is applied to user equipment, which is characterized in that including：
When cell switches or after the completion of switching, the traffic flow information belonging to the data packet transmitted not successfully is received；
The reception of traffic flow information and the data packet transmitted not successfully belonging to the data packet transmitted not successfully
State generates the state report for data flow, and is sent to target BS.
2. data transmission method according to claim 1, which is characterized in that described to receive the data packet institute transmitted not successfully
The traffic flow information of category includes：
When receiving the switching command that source base station is sent, the data transmitted not successfully that the source base station is sent are received together
Traffic flow information belonging to packet, wherein the source base station is to switch preceding base station, and target BS is base station after switching.
3. data transmission method according to claim 1, which is characterized in that described to receive the data packet institute transmitted not successfully
The traffic flow information of category includes：
After sending switching and completing signaling, the data flow belonging to the data packet transmitted not successfully that target BS is sent is received
Information, wherein source base station is to switch preceding base station, and the target BS is base station after switching.
4. data transmission method according to claim 2 or 3, which is characterized in that further include：
When receiving the switching command that the source base station is sent, data flow and Data Radio Bearer after switching are received together
The first mapping relations.
5. data transmission method according to claim 2 or 3, which is characterized in that the source base station is receiving the mesh
When marking the switching request response that base station is sent, first mapping relations that the target BS is sent are received together.
6. data transmission method according to claim 5, which is characterized in that the target BS is rung in the switching request
Answer the first mapping relations described in explicit instruction.
7. data transmission method according to claim 2 or 3, which is characterized in that described to be transmitted not successfully according to described
The reception state of traffic flow information and the data packet transmitted not successfully belonging to data packet generates the state for data flow
Report, and be sent to target BS and include：
The reception of traffic flow information and the data packet transmitted not successfully belonging to the data packet transmitted not successfully
State generates the state report for data flow；
Traffic flow information belonging to the data packet transmitted not successfully and first mapping relations determine institute after switching
State the data flow mapped Data Radio Bearer for the data packet transmitted not successfully；
The state report for the data flow for being mapped in same Data Radio Bearer is sent to the target BS together.
8. data transmission method according to claim 2 or 3, which is characterized in that the source base station receives the target base
It stands after the switching request response sent, the data packet transmitted not successfully is forwarded to the target BS.
9. data transmission method according to claim 8, which is characterized in that the source base station transmits not successfully by described
Data packet is forwarded to the target BS together；
Alternatively, the data packet transmitted not successfully in same data flow is sent to institute by the source base station according to stream compression
State target BS.
10. data transmission method according to claim 8, which is characterized in that the target BS is receiving the shape
After state report, the data packet that is not successfully received is determined according to the state report, and by the data packet being not successfully received into
Row is sent, and the data packet being not successfully received is at least part of the data packet transmitted not successfully.
11. data transmission method according to claim 10, which is characterized in that further include：
If data packet sequence row number is discontinuous in each data flow, when the data packet being not successfully received described in reception, according to
Traffic flow information and the adjustment of data packet number belonging to the data packet being not successfully received receive window.
12. data transmission method according to claim 10, which is characterized in that the target BS connects not successfully by described
When the data packet or new data packets of receipts are sent, in each data flow, in the data of the maximum sequence number of successful reception
After packet, the data packet after the data packet of the maximum sequence number is sequentially transmitted；
Alternatively, when the target BS is sent the data packet being not successfully received or new data packets, it is described not
In the data packet of Successful transmissions, after the data packet of the maximum sequence number of successful reception,
Sequentially transmit the data packet after the data packet of the maximum sequence number.
13. data transmission method according to claim 2 or 3, which is characterized in that the source base station is to the target BS
When sending switching request, the second mapping relations of data flow and Data Radio Bearer before explicit instruction switching.
14. data transmission method according to claim 2 or 3, which is characterized in that the data packet packet transmitted not successfully
It includes the data packet and source base station transmission that the source base station is not sent and does not receive the data packet for confirming feedback.
15. a kind of data transmission device is used for user equipment, which is characterized in that including：
Traffic flow information receiving module is suitable for when cell switches or after the completion of switching, receives the data packet institute transmitted not successfully
The traffic flow information of category；
State report sending module, suitable for belonging to the data packet transmitted not successfully traffic flow information and it is described not at
The reception state of the data packet of work(transmission generates the state report for data flow, and is sent to target BS.
16. data transmission device according to claim 15, which is characterized in that the traffic flow information receiving module packet
It includes：
First traffic flow information receiving unit is suitable for, when receiving the switching command that source base station is sent, receiving the source base together
The traffic flow information stood belonging to the data packet transmitted not successfully sent, wherein
The source base station is to switch preceding base station, and target BS is base station after switching.
17. data transmission device according to claim 15, which is characterized in that the traffic flow information receiving module packet
It includes：
Second traffic flow information receiving unit, be suitable for send switch complete signaling after, receive target BS send it is described not
Traffic flow information belonging to the data packet of Successful transmissions, wherein source base station is to switch preceding base station, and the target BS is after switching
Base station.
18. data transmission device according to claim 16 or 17, which is characterized in that the traffic flow information receiving module
Further include：
First receiving unit, is suitable for when receiving the switching command that the source base station is sent, and receives the number after switching together
According to the first mapping relations of stream and Data Radio Bearer.
19. data transmission device according to claim 16 or 17, which is characterized in that the source base station is described in receiving
When the switching request response that target BS is sent, first mapping relations that the target BS is sent are received together.
20. data transmission device according to claim 19, which is characterized in that the target BS is in the switching request
First mapping relations described in explicit instruction in response.
21. data transmission device according to claim 16 or 17, which is characterized in that the state report sending module packet
It includes：
State report generation unit, suitable for belonging to the data packet transmitted not successfully traffic flow information and it is described not at
The reception state of the data packet of work(transmission generates the state report for data flow；
Data Radio Bearer determination unit, suitable for traffic flow information belonging to the data packet transmitted not successfully and described
First mapping relations determine the data flow mapped Data Radio Bearer of the data packet transmitted not successfully after switching；
State report transmission unit, suitable for the state report for being mapped in the data flow of same Data Radio Bearer to be sent to together
The target BS.
22. data transmission device according to claim 16 or 17, which is characterized in that the source base station receives the target
After the switching request response that base station is sent, the data packet transmitted not successfully is forwarded to the target BS.
23. data transmission device according to claim 22, which is characterized in that the source base station is by the failed transmission
Data packet be forwarded to the target BS together；
Alternatively, the data packet transmitted not successfully in same data flow is forwarded to the target by the source base station together
Base station.
24. data transmission device according to claim 22, which is characterized in that the target BS is receiving the shape
After state report, the data packet that is not successfully received is determined according to the state report, and by the data packet being not successfully received into
Row is sent, and the data packet being not successfully received is at least part of the data packet transmitted not successfully.
25. data transmission device according to claim 24, which is characterized in that further include：
Receive window adjustment module, if discontinuous suitable for data packet sequence row number in each data flow, described in receiving not at
When the data packet that work(receives, the traffic flow information belonging to the data packet being not successfully received and the adjustment of data packet number
Receive window.
26. data transmission device according to claim 24, which is characterized in that the target BS connects not successfully by described
When the data packet or new data packets of receipts are sent, in each data flow, in the data of the maximum sequence number of successful reception
After packet, the data packet after the data packet of the maximum sequence number is sequentially transmitted；
Alternatively, when the target BS is sent the data packet being not successfully received or new data packets, it is described not
In the data packet of Successful transmissions, after the data packet of the maximum sequence number of successful reception,
Sequentially transmit the data packet after the data packet of the maximum sequence number.
27. data transmission device according to claim 16 or 17, which is characterized in that the source base station is to the target base
When transmission switching request of standing, the second mapping relations of data flow and Data Radio Bearer before explicit instruction switching.
28. data transmission device according to claim 16 or 17, which is characterized in that the data packet transmitted not successfully
The data packet not sent including the source base station and the source base station send and do not receive the data packet for confirming feedback.
29. a kind of user equipment, which is characterized in that including such as claim 15 to 28 any one of them data transmission device.
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| CN201910797936.4A CN110519814A (en) | 2017-03-23 | 2017-03-23 | Data transmission method and device, storage medium, base station |
| CN201710178216.0A CN108632933B (en) | 2017-03-23 | 2017-03-23 | Data transmission method and device and user equipment |
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| CN201710178216.0A CN108632933B (en) | 2017-03-23 | 2017-03-23 | Data transmission method and device and user equipment |
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| CN113055425A (en) * | 2019-12-27 | 2021-06-29 | 大唐移动通信设备有限公司 | Data transmission method and device |
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| WO2021155584A1 (en) * | 2020-02-07 | 2021-08-12 | Oppo广东移动通信有限公司 | Communication mode switching method and apparatus, and device |
| CN115843064A (en) * | 2021-09-18 | 2023-03-24 | 展讯通信（上海）有限公司 | Data transmission method, communication device, chip and module equipment thereof |
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Also Published As
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| CN108632933B (en) | 2020-10-02 |
| CN110519814A (en) | 2019-11-29 |
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