CN110519814A - Data transmission method and device, storage medium, base station - Google Patents
Data transmission method and device, storage medium, base station Download PDFInfo
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- CN110519814A CN110519814A CN201910797936.4A CN201910797936A CN110519814A CN 110519814 A CN110519814 A CN 110519814A CN 201910797936 A CN201910797936 A CN 201910797936A CN 110519814 A CN110519814 A CN 110519814A
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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
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- H04W36/08—Reselecting an access point
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Abstract
A kind of data transmission method and device, storage medium, base station, the data transmission method include: the second mapping relations of the data flow and Data Radio Bearer when receiving switching request, before obtaining switching；After signaling is completed in the switching for receiving user equipment transmission, the state report for the data packet transmitted not successfully that user equipment is sent is received；The reception state of the data packet transmitted not successfully is determined according to the first mapping relations of data flow and Data Radio Bearer after switching, second mapping relations and the state report.The Lossless transport of switching evidence may be implemented in technical solution of the present invention.
Description
Technical field
It is on March 23rd, 2017 that the application, which is the applying date, and application No. is 201710178216.0, entitled data are passed
The divisional application of the patent application of transmission method, device and user equipment.
The present invention relates to field of communication technology more particularly to a kind of data transmission method and device, storage medium, base stations.
Background technique
In the 5th third-generation mobile communication technology (5th-Generation, 5G), in order to realize control plane and the separation of user face,
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
Very big Flow is mapped on different DRB.At layer 2 (Layer 2), there is the layer 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 guarantee 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 report (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
Data packet sequentially is sent to the high-rise of UE, so can be realized the switching of data lossless.
But aforesaid way can only map constant scene according to stream for switching.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 transmit to UE, influences the experience of user at the phenomenon that may cause loss of data.
Summary of the invention
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:
In cell switching or after the completion of switching, traffic flow information belonging to the data packet transmitted not successfully is received；According to
The reception state of traffic flow information belonging to the data packet transmitted not successfully and the data packet transmitted not successfully generates
For the state report of data flow, and it is sent to target BS.
Optionally, traffic flow information belonging to the data packet that the reception is transmitted not successfully includes: to receive source base station hair
When the switching command sent, the letter of data flow 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 include: when receiving the switching command that the source base station is sent, one
And receive the first mapping relations of data flow and Data Radio Bearer after switching.
Optionally, traffic flow information belonging to the data packet that the reception is transmitted not successfully includes: to send switching completion
After signaling, 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 according to belonging to the data packet transmitted not successfully and the failed transmission
The reception state of data packet generate the state report for being directed to data flow, and be sent to target BS include: according to it is described not at
The reception state of traffic flow information belonging to the data packet of function transmission and the data packet transmitted not successfully, which generates, is directed to data
The state report of stream；According to 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 it is described not at
The data packet of function 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
Received data packet, 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 include: when packet sequence number is discontinuous in each data flow, connecing
When the data packet being not successfully received described in receipts, according to traffic flow information and data packet belonging to the data packet being not successfully received
Sequence number adjustment receives window.
Optionally, when the target BS is sent the data packet being not successfully received or new data packets, In
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, the data flow when source base station sends switching request to the target BS, before explicit instruction switching
With the second mapping relations of Data Radio Bearer.
Optionally, the data packet transmitted not successfully includes the not sent data packet of the source base station and the source base station
Send and do not receive the data packet of confirmation 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
Include:
Traffic flow information receiving module is suitable for receiving the data transmitted not successfully in cell switching or after the completion of switching
Traffic flow information belonging to packet；State report sending module, suitable for the data according to 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 being directed to data flow, and is sent to target
Base station.
Optionally, the traffic flow information receiving module includes: the first traffic flow information receiving unit, is suitable in the source of reception
When the switching command that base station is sent, 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 include: the 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 receiving switching together.
Optionally, the traffic flow information receiving module includes: the second traffic flow information receiving unit, suitable for cutting in transmission
It changes after completing signaling, receives 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 when receiving the switching request response that the target BS is sent together
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 belonging to defeated data packet and the data packet transmitted not successfully is generated for data flow
State report；Data Radio Bearer determination unit, suitable for the traffic flow information according to 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 it is described not at
The data packet of function 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
Received data packet, 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 include: receive window adjustment module, be suitable for the data in each data flow
When packet number is discontinuous, when the data packet being not successfully received described in the reception, according to the data packet institute being not successfully received
Traffic flow information and the packet sequence 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
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, the data flow when source base station sends switching request to the target BS, before explicit instruction switching
With the second mapping relations of Data Radio Bearer.
Optionally, the data packet transmitted not successfully includes the not sent data packet of the source base station and the source base station
Send and do not receive the data packet of confirmation 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 data flow and Data Radio Bearer before obtaining switching；In
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 include: 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 number belonging to the data packet transmitted not successfully when cell switches or after the completion of switching
According to stream information；According to traffic flow information belonging to the data packet transmitted not successfully and the data packet transmitted not successfully
Reception state generates the state report for being directed to data flow, and is sent to target BS.Technical solution of the present invention is by informing user
Traffic flow information belonging to the 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 can in the next steps accurately do not receive user equipment is sent to user and sets
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
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 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 for occupying source base station
Communication efficiency.
Detailed description of the invention
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 embodiment
As described in the background art, aforesaid way can only map constant field according to stream for switching 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 knowing whether source base station has the data packet that do not transmit to UE before switching, may cause loss of data, influences the body of user
It tests.
Technical solution of the present invention passes through traffic flow information belonging to the data packet that informing user equipment transmits not successfully, then uses
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 the next steps 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, with reference to the accompanying drawing 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: in cell switching or after the completion of switching, data flow belonging to the data packet transmitted not successfully is received
Information；
Step S102: it described transmits according to traffic flow information belonging to the data packet transmitted not successfully and not successfully
The reception state of data packet generates the state report for being directed to 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, traffic flow information belonging to the data packet transmitted not successfully is received.
For example, the corresponding PDCP sequence number of the data packet transmitted not successfully (sequence number, SN) be respectively 21,22,23 to
40, wherein traffic flow information belonging to the data packet of singular sequence number is Flow1, number belonging to the data packet of even numbers sequence number
It is Flow2 according to stream information.Then user equipment needs traffic flow information belonging to the received data packet transmitted not successfully can be,
The packet sequence number that Flow1 is transmitted not successfully is 21,23,25,27,29,31,33,35,37,39；Flow2 is transmitted not successfully
Packet sequence 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 also be discontinuous.
Further, traffic flow information belonging to the data packet transmitted not successfully can be source base station transmission, can also be with
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
UE is sent to according to the sequence number of packet.
Further, the data packet transmitted not successfully may include the not sent data packet of the source base station and described
Source base station sends and does not receive the data packet of confirmation feedback.Specifically, failed transmission is for source base station, wherein not
It 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 being directed to 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
It can be PDCP state report.
For example, being respectively 21,22,23 to 40 data packet transmitted not successfully for PDCP sequence number, UE has succeeded
The data packet for having received Serial No. 24,25,28,29, then UE can according to traffic flow information belonging to different data packet and
The packet information (Serial No. 24,25,28,29) having been received, generates state report for Flow1 and Flow2 respectively；
For the data packet of Serial No. 21,23,25,27,29,31,33,35,37,39 in Flow1, 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.So that target base
The data packet that user equipment is really received He 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 according to packet to save wireless transmission resources.
It should be noted that the data transmission method of the present embodiment can be used for following scene: being 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, switching first 2
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 passes through traffic flow information belonging to the data packet that informing 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 can in the next steps accurately set user
The standby data packet not received is sent to user equipment, realizes the Lossless transport of switching evidence, avoids data-bag lost, mention
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 process 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, send switching request 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
Switching command is sent, switching command includes the wireless parameter that target BS is UE distribution.Wireless parameter in UE foundation switching command,
Target BS is accessed, switching is sent to target BS and 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 described transmits according to traffic flow information belonging to the data packet transmitted not successfully and not successfully
The reception state of data packet generates the state report for being directed to data flow；
Step S204: it is closed according to traffic flow information belonging to the data packet transmitted not successfully and first mapping
System determines the data flow mapped Data Radio Bearer of the data packet transmitted not successfully after switching；
Step S205: the state report for being mapped in the data flow of 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
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 also may be used 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 the first mapping relations can be passed through switching life by source base station
Order is sent to user equipment.
Preferably, the source base station receives institute when receiving the switching request response that the target BS is sent together
State first mapping relations of target BS transmission.In other words, before source base station sends switching command to user equipment, mesh
It marks base station and the first mapping relations is sent to by source 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 configuration is respectively positioned in the container (container) of an access layer,
It is not required to be appreciated that wireless parameter as the Xn interface 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
Cracking cannot identify whether that Flow to DRB mapping variation has occurred when the switching request response stood.Further, when source base
It stands when belonging to different protocol versions between target BS, such as target BS is the base station of highest version, and source base station is low
The base station of version, at this time if target BS is that 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 identify whether that Flow to DRB mapping variation has occurred.
Therefore, target BS can Flow to DRB in switching request response after explicit instruction switching mapping relations (namely first
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 being directed to 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 below 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 number is 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, 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 be generated respectively 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 is sent to target BS after can merging for Flow1 and Flow2 state report.
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 received data packet of function, 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,
Can determine PDCP sequence number be respectively 21,22,23 to 40 the data packet transmitted not successfully in, 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 successively transmit the number that UE is not received since unreceived first data packet 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 successively transmitted
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 the reception, according to number belonging to the data packet being not successfully received
Window is received according to stream information and packet sequence number adjustment.
Specifically, when target BS sends the data packet being not successfully received, for each data flow, number that UE is received
Can be according to the sequence number of packet it is discontinuous, at this time UE can with active accommodation receive window, 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 root
According to 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 next data packet received is the data packet of sequence number 31, then adjustable reception window
The data packet of sequence number 31 is received, avoids waiting for the data packet of sequence number 28 and the data packet of sequence number 29.
Preferably, when the target BS is sent the data packet being not successfully received or new data packets, In
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 switching
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 transmit by number, subsequent data packet and so on, 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 described transmits according to traffic flow information belonging to the data packet transmitted not successfully and not successfully
The reception state of data packet generates the state report for being directed to data flow；
Step S303: it is closed according to traffic flow information belonging to the data packet transmitted not successfully and first mapping
System determines the data flow mapped Data Radio Bearer of the data packet transmitted not successfully after switching；
Step S304: the state report for being mapped in the data flow of same Data Radio Bearer is sent to the target together
Base station；
Step S305: when packet sequence number is discontinuous in each data flow, the number that is not successfully received described in the reception
When according to packet, window is received according to traffic flow information belonging to the data packet being not successfully received and packet sequence number adjustment.
In specific implementation, in step S301, user equipment can be completed in access target BS, namely sending switching
After signaling, traffic flow information belonging to the data packet transmitted not successfully that target BS is sent is received.Namely every number
User equipment is sent to according to the sequence number for flowing corresponding data packet.
Specifically, after UE receives traffic flow information belonging to the data packet transmitted not successfully, according in source base station side
The reception state of data packet is received, setting is directed to the state report of data flow.Then it is sent to target BS and is directed to every 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 number, therefore it is properly termed as
PDCP state report, is also possible to 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 embodiment 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, the data flow when source base station sends switching request to the target BS, 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 interface 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 in container by RRC protocol analysis, then knows Flow to the DRB's of source base station side
Mapping relations, cause target BS receive switching request response by cannot it is cracking identification source base station side Flow to DRB mapping
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 working principles, the more contents of working method of the embodiment of the present invention, are referred to phase of the Fig. 1 into 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 receiving failed transmission in cell switching or after the completion of switching
Data packet belonging to traffic flow information.
State report sending module 402 is suitable for the traffic flow information according to 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 number (sequence of the data packet transmitted not successfully
It number) is respectively 21,22,23 to 40, wherein 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, traffic flow information belonging to the data packet transmitted not successfully can be source base station transmission, can also be with
It is that target BS is sent.
Further, the data packet transmitted not successfully may include the not sent data packet of the source base station and described
Source base station sends and does not receive the data packet of confirmation 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 He 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 passes through traffic flow information belonging to the data packet that informing 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 can in the next steps accurately set user
The standby data packet not received is sent to user equipment, realizes the Lossless transport of switching evidence, avoids data-bag lost, mention
High user experience.
Working 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 guarantee 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 data flow and Data Radio Bearer before obtaining switching；In
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
It accuses and determines user terminal to the practical reception state for the data packet transmitted not successfully, so as to accurately will in the next steps
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 include: 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, target BS knows that it includes the data packet of Serial No. odd number for Flow1, i.e., sequence number 21,23,25,27,
29,31 data packet belongs to Flow1, while knowing that the data packet of sequence number 25 and 29 is 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 after receiving switching request response by source base station
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 packet sequence 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 notice UE.Target BS can also notify UE sequence number simultaneously
The received success of 25 and 29 data packet；Alternatively, target BS can also notify the number of UE sequence number 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 next received data packet 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 number 21,23,25,27,29 belongs to Flow1, and 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 when receiving switching command together, and be closed according to the first mapping
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 report.
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, 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 receiving switching 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 believed suitable for the data flow according to 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 being directed to data flow；Data Radio Bearer determines
Unit 5022 is suitable for the traffic flow information according to 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 packet sequence number is discontinuous in each data flow,
When the data packet being not successfully received described in the reception, according to 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 passes through traffic flow information belonging to the data packet that informing 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 can in the next steps accurately set user
The standby data packet not received is sent to user equipment, realizes the Lossless transport of switching evidence, avoids data-bag lost, mention
High user experience.
Working 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 data transmission device shown in fig. 5 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 data transmission of cell switching front and back.User's packet
Include but be not limited to mobile phone, tablet computer, computer.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can store in computer readable storage medium, storage
Medium may include: ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Anyone 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 (6)
1. a kind of data transmission method characterized by comprising
When receiving switching request, the second mapping relations of data flow and Data Radio Bearer before obtaining switching；
After signaling is completed in the switching for receiving user equipment transmission, the data packet transmitted not successfully that user equipment is sent is received
State report；
According to the first mapping relations of data flow and Data Radio Bearer after switching, second mapping relations and the state
Report determines the reception state of the data packet transmitted not successfully.
2. data transmission method according to claim 1, which is characterized in that further include:
Determine that the data packet being not successfully received, the data packet being not successfully received are described failed according to the reception state
At least part of the data packet of transmission；
The data packet being not successfully received is sent to the user equipment.
3. a kind of data transmission device characterized by comprising
Second mapping relations obtain module, to when receiving switching request, the data flow and data before obtaining switching are wireless
Second mapping relations of carrying；
Status report reception module receives user equipment hair after completing signaling in the switching for receiving user equipment transmission
The state report for the data packet transmitted not successfully sent；
Reception state determining module, to according to the first mapping relations of data flow and Data Radio Bearer after switching, described
Second mapping relations and the state report determine the reception state of the data packet transmitted not successfully.
4. data transmission device according to claim 3, which is characterized in that further include:
Determine that the data packet being not successfully received, the data packet being not successfully received are described failed according to the reception state
At least part of the data packet of transmission；
The data packet being not successfully received is sent to the user equipment.
5. a kind of storage medium, is stored thereon with computer instruction, which is characterized in that the right of execution when computer instruction is run
Benefit requires the step of 1 or 2 data transmission method.
6. a kind of base station, including memory and processor, the meter that can be run on the processor is stored on the memory
Calculation machine instruction, which is characterized in that perform claim requires 1 or 2 data to pass when the processor runs the computer instruction
The step of transmission method.
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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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| WO2023040126A1 (en) * | 2021-09-18 | 2023-03-23 | 展讯通信（上海）有限公司 | Data transmission method, communication apparatus, and chip and module device thereof |
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| CN113055425B (en) * | 2019-12-27 | 2022-04-05 | 大唐移动通信设备有限公司 | Data transmission method and device |
| WO2024152160A1 (en) * | 2023-01-16 | 2024-07-25 | 北京小米移动软件有限公司 | Information feedback method and apparatus |
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| CN108632933B (en) | 2020-10-02 |
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