CN106686673A - Processing method of SN changeover failure in UE switching process and device - Google Patents
Processing method of SN changeover failure in UE switching process and device Download PDFInfo
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- CN106686673A CN106686673A CN201510768091.8A CN201510768091A CN106686673A CN 106686673 A CN106686673 A CN 106686673A CN 201510768091 A CN201510768091 A CN 201510768091A CN 106686673 A CN106686673 A CN 106686673A
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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
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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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
The invention discloses a processing method of a serial number SN changeover failure in a user equipment UE switching process and a device. The method and the device are used for achieving that the business of the UE is not interrupted without disconnecting the link between the UE and a base station in case of an SN changeover failure during the UE switching process, thereby improving user experience. The method comprises steps that after a target base of the UE switching is switched to a target base station from a source base station, if it is determined that the changeover of SN information for carrying out current business communication with the UE fails, the target base station suspends the uplink and downlink business of the UE; the target base station acquires the SN information; and the target base station recovers to execute the uplink and downlink business of the UE according to the acquired SN information.
Description
Technical field
The present invention relates to SN switches failure in communication technical field, more particularly to a kind of UE handoff procedures
Processing method and processing device.
Background technology
Sequence number (Sequence Number, SN) is Long Term Evolution (Long Term Evolution, LTE)
User plane packets convergence layer protocol (Packet Data Convergence Protocol, PDCP) in system
The variable that layer is safeguarded, be mainly used in user equipment (User Equipment, UE) carries out business and between base station
The process such as the transmission of packet, sequence and encryption and decryption during communication.Carry out in switchover procedure between base station in UE,
The SN of UE sides is continuous always, and the SN of base station side is between source base station and target BS by UE
SN switch flow process and ensure its continuity, if SN switches failure or delay, can cause UE sides with
The SN of base station side is inconsistent, the problems such as so as to there is up-downgoing data packetloss, encryption and decryption data bag mistake,
Cause UE service disconnections.
In prior art, after UE is switched to target BS by source base station, if target BS determines SN
Switch unsuccessfully, then target BS release UE, while also switching packet by what deletion source base station sent.This
Sample, UE needs to initiate access procedure to target BS again, and then link is set up between target BS,
Simultaneously the UE and SN of the PDCP layers of target BS side is required to reinitialize.
It can be seen that, when UE carries out handover operation between base station, if SN is switched unsuccessfully, using above-mentioned existing skill
Art will cause UE service after switching to interrupt, need to wait UE again after access base station could recovery business,
This will affect the access again of Consumer's Experience, UE also to increase network burden.
The content of the invention
The processing method and processing device that SN in a kind of UE handoff procedures switches failure is embodiments provided,
To in the case of SN is switched unsuccessfully in UE handoff procedures, the link between UE and base station need not disconnect,
The business for ensureing UE is not interrupted, and reduces the burden of UE and network side, lifts network performance, and then
Lift Consumer's Experience.
SN switches the processing method of failure in a kind of UE handoff procedures provided in an embodiment of the present invention, including：
The target BS of UE switchings is after the UE is switched to the target BS from source base station, however, it is determined that use
Fail in the SN information switchings that current business communication is carried out with the UE, then the target BS suspends and is somebody's turn to do
The up-downgoing business of UE；
The target BS obtains the SN information；
The target BS recovers the up-downgoing business for performing the UE according to the SN information for obtaining.
So as in the case of SN is switched unsuccessfully in UE handoff procedures, the target BS of UE switchings suspends
The up-downgoing business of the UE；The target BS is obtained for carrying out current business communication with the UE
SN information；The target BS recovers the up-downgoing for performing the UE according to the SN information for obtaining
Link between business, therefore UE and base station without the need for disconnecting, do not interrupt, Jin Erti by the business for having ensured UE
Consumer's Experience is risen.Also, due to the method that present example is provided, without the need for causing between UE and base station
Link disconnects, and so as to the process and UE that eliminate UE re-accessing networks side resend loss is switched
Packet process, reduce further the burden of UE and network side, improve network performance.
It is preferred that the target BS includes wireless heterogeneous networks (Radio Resource Control, RRC)
Entity and PDCP entities.
It is preferred that the target BS of the UE be determined as follows it is described for carrying out with the UE
The SN information switchings failure of current business communication：
The RRC entities send the UE and have completed from source base station to the mesh to the PDCP entities
The instruction message of mark base station switching；
The PDCP entities are received after the instruction message, however, it is determined that do not receive the source before this
The SN information for carrying out current business communication with the UE that base station sends, it is determined that the SN letters
Breath is switched unsuccessfully.
It is preferred that the target BS obtains the SN information, specifically include：
The PDCP entities send the instruction message of the SN information switchings failure to the RRC entities；
The RRC entities are received after the instruction message of the SN information switchings failure, transmitting counter inspection
Counter Check message is surveyed to the UE, also, when the counter for receiving the UE transmissions is detected
During response Counter Check Response message, obtain from the Counter Check Response message
Take the SN information.
It is preferred that the target BS is according to the SN information for obtaining, recover to perform the upper of the UE
Downlink business, specifically includes：
The SN information is sent to the PDCP entities by the RRC entities；
The PDCP entities recover the up-downgoing business for performing the UE according to the SN information.
It is preferred that the SN information, including for carrying out the SN of current uplink service communication with the UE
Information and the SN information for carrying out current downlink service communication with the UE.
SN switches the processing meanss of failure in a kind of UE handoff procedures provided in an embodiment of the present invention, including：
RRC entities and PDCP entities；Wherein,
The PDCP entities are used for after the UE is switched to target BS from source base station, however, it is determined that use
Fail in the SN information switchings that current business communication is carried out with the UE, then suspend the up-downgoing of the UE
Business；
The RRC entities are used to determine for carrying out current business with the UE in the PDCP entities
After the SN information switchings failure of communication, the SN information is obtained；
The PDCP entities are additionally operable to the SN information obtained according to the RRC entities, recover to perform
The up-downgoing business of the UE.
It is preferred that the processing meanss that SN switches failure in the UE handoff procedures are the UE switchings
Target BS.
It is preferred that the RRC entities are additionally operable to：The UE is sent to the PDCP entities to complete
From the instruction message that source base station switches to the target BS；
The PDCP entities are determined as follows described for carrying out current business communication with the UE
SN information switchings failure：
The PDCP entities are received after the instruction message, however, it is determined that do not receive the source before this
The SN information for carrying out current business communication with the UE that base station sends, it is determined that the SN letters
Breath is switched unsuccessfully.
It is preferred that the PDCP entities are additionally operable to：The SN information switchings are sent to the RRC entities
The instruction message of failure；
When the RRC entities obtain the SN information, specifically for：The RRC entities receive institute
After stating the instruction message of SN information switching failures, transmitting counter detection Counter Check message is to described
UE, also, when the counter detection for receiving the UE transmissions responds Counter Check Response
During message, from the Counter Check Response message SN information is obtained.
It is preferred that the RRC entities are additionally operable to：The SN information is sent into the PDCP entities；
The PDCP entities recover the industry up and down for performing the UE according to the SN information for obtaining
During business, specifically for：The PDCP entities are received after the SN information that the RRC entities send,
According to the SN information, recover the up-downgoing business for performing the UE.
It is preferred that the SN information, including for carrying out the SN of current uplink service communication with the UE
Information and the SN information for carrying out current downlink service communication with the UE.
Description of the drawings
Fig. 1 is a kind of target BS provided in an embodiment of the present invention when SN is switched in UE handoff procedures
Handling process schematic diagram；
Fig. 2 is RRC entities in a kind of target BS provided in an embodiment of the present invention in UE handoff procedures
The handling process schematic diagram that middle SN is participated in when switching unsuccessfully；
Fig. 3 is the processing method that SN switches failure in a kind of UE handoff procedures provided in an embodiment of the present invention
Schematic flow sheet；
Fig. 4 is the processing meanss that SN switches failure in a kind of UE handoff procedures provided in an embodiment of the present invention
Structural representation.
Specific embodiment
The processing method and processing device that SN in a kind of UE handoff procedures switches failure is embodiments provided,
To in the case of SN is switched unsuccessfully in UE handoff procedures, the link between UE and base station need not disconnect,
The business for ensureing UE is not interrupted, and reduces the burden of UE and network side, lifts network performance, and then
Lift Consumer's Experience.
Handling process when providing target BS SN is switched in UE handoff procedures from overall angle below is shown
It is intended to, as shown in Figure 1.
Step S101, UE carries out handover operation between base station, initiates to access in Target Station, and target BS is given
UE link setups.
In step S102, UE handoff procedure, the PDCP entities in target BS receive source base station transmission
Switch packet.
Wherein, above-mentioned packet of switching is including the current ongoing business datums of UE.
After step S103, UE is completed from source base station to the handover operation of target BS, in target BS
PDCP entities receive the UE of RRC entities (the can be also simply referred to as high level) transmission in target BS and complete
From source base station to the instruction message of the target BS switching, afterwards, step S104 is proceeded to.
PDCP entities in step S104, target BS judge whether that the SN for receiving source base station transmission is switched
Message, if receiving the SN switching messages, proceeds to step S108；If not receiving the SN
Number switching messages, then proceed to step S105.
Wherein, the PDCP entities in target BS judge whether the SN switching messages for receiving source base station transmission,
It is to have completed from source base station in the UE that the RRC entities for receiving target BS send according to the PDCP entities
To before the instruction message of the target BS switching, if received the RRC entities forwarding in target BS
By source base station send the SN information for carrying out current business communication with the UE.
SN is switched failure and is sent to target base by the PDCP entities in step S105, target BS
RRC entities in standing, so that the RRC entities in target BS receive the SN failure is switched
The SN information for carrying out current business communication with the UE, the wherein RRC in target BS are reacquired afterwards
How entity obtains the SN information for carrying out current business communication with the UE, can be found in and is introduced below.
RRC entity of the PDCP entities in step S106, target BS in target BS is received sends
The SN information for carrying out current business communication with UE before, suspend the up-downgoing business of the UE,
Avoid sending the packet of wrong No. SN to UE, so as to cause descending packet loss.
PDCP entities in step S107, target BS receive what the RRC entities in target BS sent
For carrying out the SN information of current business communication with UE, by the SN information configurations local.
PDCP entities in step S108, target BS are according to receiving for carrying out current industry with UE
The SN information of business communication, recovers the up-downgoing business for performing the UE, while switching source base station transmission
Packet is sent to UE.
As can be seen that by above-mentioned handling process, when SN is switched unsuccessfully UE in handoff procedure, can
Ensure that the business of UE is uninterrupted, so as to bring preferably experience to user.
The handling process that SN is switched in above-mentioned UE handoff procedures, is with the PDCP entities in target BS
It is described for executive agent, correspondingly, the RRC entities be given in target BS switched in UE
The handling process participated in when SN is switched unsuccessfully in journey, as shown in Figure 2.
Step S201, UE carries out handover operation between base station, initiates to access in Target Station, and target BS is given
UE link setups.
After step S202, UE is completed from source base station to the handover operation of target BS, the RRC in target BS
Entity sends UE and has completed from source base station to the instruction message of the target BS switching in target BS
PDCP entities.
If step S203, UE SN when handover operation between base station is carried out is switched unsuccessfully, target BS
In RRC entities can receive the SN that PDCP entities in target BS send and switch the instruction of failure and disappear
Breath, proceeds to afterwards step S204.
RRC entities in step S204, target BS to UE transmitting counters detect Counter Check
Message, to ask to obtain the SN information for carrying out current business communication with the UE from UE.
RRC entities in step S205, target BS receive the counter detection response that UE sends
Counter Check Response message, and obtain from the Counter Check Response message and be used for
SN information with the UE carries out current business communication, proceeds to afterwards step S206.
RRC entities in step S206, target BS will be used to carry out current business communication with the UE
SN information is sent to the PDCP entities in target BS, so as to the PDCP entities in target BS according to
The SN Information recoverings for being used to carrying out current business communication with the UE perform the up-downgoing business of the UE.
The process side of failure will be switched to SN in a kind of UE handoff procedures provided in an embodiment of the present invention below
Method is discussed in detail.
Referring to Fig. 3, SN switches the process of failure in a kind of UE handoff procedures provided in an embodiment of the present invention
Method includes：
S301, UE switching target BS after the UE is switched to the target BS from source base station, if
It is determined that the SN information switchings for carrying out current business communication with the UE fail, then the target BS
Suspend the up-downgoing business of the UE；
Wherein, in the scenario above, target BS suspends the up-downgoing business of the UE, is in order to avoid base
Stand and the SN information of mistake is carried in the packet when downlink data packet is sent, cause descending packet loss,
And also to avoid UE send upstream data bag when, due to base station side it is inconsistent with the SN of UE sides,
Cause up packet loss.
S302, the target BS obtain the SN information；
S303, the target BS recover to perform the upper and lower of the UE according to the SN information for obtaining
Industry is engaged in.
It is preferred that the target BS includes RRC entities and PDCP entities.
So-called SN information switchings failure, that is, when UE is switched from source base station to target BS, target
Base station do not receive source base station transmission SN switching messages (in the SN switching messages comprising base station be used for
The UE carries out the SN information of current business communication) so that the SN letters in the PDCP layers of base station side
Breath is inconsistent with the SN information in the PDCP layers of UE sides.
It is preferred that the target BS of the UE be determined as follows it is described for carrying out with the UE
The SN information switchings failure of current business communication：
RRC entities in the target BS to the PDCP entities in the target BS send the UE
The instruction message switched to the target BS from source base station has been completed；
PDCP entities in the target BS receive the UE and have completed from source base station to the target base
After the instruction message of switching of standing, however, it is determined that do not receive that the source base station sends before this for institute
Stating UE carries out the SN information of current business communication, it is determined that the SN information switchings failure.
It is preferred that the SN information for carrying out current business communication with the UE that the source base station sends
It is RRC that RRC entities in the source base station by the UE are sent in the target BS of the UE switchings
Entity, and the PDCP entities being transmitted to by the RRC entities in target BS in target BS.If
PDCP entities in target BS receive the UE and have completed what is switched to the target BS from source base station
Indicate message before, do not receive in target BS RRC forwarding the source base station send for
The UE carries out the SN information of current business communication, then illustrate the SN information switchings failure.Preferably
Ground, it may be possible to which the RRC entities in target BS are not successfully receiving the SN switching messages of source base station transmission,
The PDCP entities in target BS are caused to be not received by described logical for carrying out current business with the UE
The SN information of letter；It is also likely to be that RRC entities in target BS receive the SN of source base station transmission and switch
Message, but it is not successfully sent to the PDCP entities in target BS；It is also likely to be other situations, leads
Cause that the PDCP entities in target BS are not received by that the source base station sends for carrying out with the UE
The SN information of current business communication.In a word, either what reason, as long as the PDCP in target BS
Entity is not received by the SN letters for carrying out current business communication with the UE that the source base station sends
Breath, then be assured that the SN information switchings failure.Certainly, if the PDCP realities in target BS
Body receives the SN information for carrying out current business communication with the UE that the source base station sends, then
Determine the SN information switchings success, in this case, PDCP entities are directly according to the SN for receiving
Information, it is possible to proceed the up-downgoing business of UE.
It is preferred that target BS obtains the SN information for carrying out current business communication with the UE,
Specifically include：
PDCP entities in target BS to the RRC entities in target BS send the SN information switchings
The instruction message of failure；
RRC entities in the target BS are received after the instruction message of the SN information switchings failure,
Transmitting counter detection Counter Check message gives the UE, to obtain described being used for and the UE
The SN information of current business communication is carried out, also, when the counter detection for receiving the UE transmissions rings
When answering Counter Check Response message, obtain from the Counter Check Response message
The SN information for carrying out current business communication with the UE.
It is preferred that target BS is used to carry out the SN of current business communication with the UE according to obtaining
Information, recovers the up-downgoing business for performing the UE, specifically includes：
RRC entities in the target BS are by described for carrying out current business communication with the UE
SN information is sent to the PDCP entities；
PDCP entities in the target BS recover to perform the upper of the UE according to the SN information
Downlink business.
For example, between base station and UE when up-downgoing packet is sent, newest SN information is carried
It is transmitted in packet, so that other side can be properly received the packet and the packet is decrypted
Etc. process.
It is preferred that above-mentioned SN information, including for carrying out the SN of current uplink service communication with the UE
Information and the SN information for carrying out current downlink service communication with the UE.Also, it is preferred that institute
State SN information for carrying out current uplink service communication with the UE and it is described for the UE
Carrying out the SN information of current downlink service communication includes two parts content：SN numbers and HFN (Hyper
Frame Number, Hyper Frame Number).
For example, UE from source base station to target BS switch when, if carrying out between UE and base station business lead to
Letter, then the business data packet is transmitted to target BS by source base station, after UE successful switch is to target BS,
If target BS determines that SN is switched unsuccessfully, obtain from UE ends and lead to for carrying out current business with the UE
The SN information of letter, now, target BS can be according to the ongoing business of SN Information recoverings.Tool
Body ground, target BS carries the SN information for carrying out current downlink service communication with the UE for obtaining
In the packet of source base station forwarding, the packet is cooperateed with to send jointly to UE.If after this,
Target BS needs to send new packet to UE, then carry when target BS sent packet according to last time
SN information, update this SN information and carry in the new packet, for example last time send number
According to for carrying out No. SN of downlink business communication with the UE being 1 for 10, HFN during bag, then this sends
No. SN need to carried during packet is 1 for 11, HFN, by that analogy.Correspondingly, UE sends up
When packet gives the target BS, UE needs to carry on this for the SN information of uplink service communication
Target BS is sent in row packet.
It should be appreciated that when carrying out uplink service between UE and base station and communicating, in the PDCP entities of UE sides
It is used for the SN that uplink service communicates in PDCP entities of the SN information with base station side for uplink service communication
Information should be always consistent；When carrying out downlink business between UE and base station and communicating, the PDCP of UE sides
It is used for the SN information of downlink business communication in entity logical for downlink business with the PDCP entities of base station side
The SN information of letter should be always consistent.So, just can guarantee that and can carry out between UE and base station normally
Up-downgoing service communication.
Accordingly, referring to Fig. 4, SN is switched in a kind of UE handoff procedures provided in an embodiment of the present invention
The processing meanss of failure, including：
RRC entities 11 and PDCP entities 12；Wherein,
The PDCP entities 12 are used for after the UE is switched to target BS from source base station, if really
The fixed SN information switchings failure for being used to carry out current business communication with the UE, then suspend the upper of the UE
Downlink business；
The RRC entities 11 are used to determine for carrying out currently with the UE in the PDCP entities 12
After the SN information switchings failure of service communication, the SN information is obtained；
The PDCP entities 12 are additionally operable to the SN information obtained according to the RRC entities 11, extensive
The up-downgoing business of the UE is performed again.
It is preferred that the processing meanss that SN switches failure in above-mentioned UE handoff procedures are the UE switchings
Target BS.
It is preferred that the RRC entities 11 are additionally operable to：The UE is sent to the PDCP entities 12
The instruction message switched to the target BS from source base station has been completed；
The PDCP entities 12 are determined as follows described for carrying out current business with the UE
The SN information switchings failure of communication：
The PDCP entities 12 receive the UE and have completed what is switched to the target BS from source base station
After indicating message, however, it is determined that do not receive that the source base station sends before this for entering with the UE
The SN information of service communication before the trade, it is determined that the SN information switchings failure.
It is preferred that the RRC entities 11 have been completed from source base station to the target base in the transmission UE
Stand before the instruction message of switching, be additionally operable to：
Receive the SN letters for carrying out current business communication with the UE that the source base station of the UE sends
Breath, and the SN information for receiving is transmitted into the PDCP entities 12.Certainly, if RRC entities 11
It is not received by the SN for carrying out current business communication with the UE that the source base station of the UE sends
Information, just without the follow-up forwarding SN information to the PDCP entities 12.
It is preferred that the PDCP entities 12 are additionally operable to：The SN letters are sent to the RRC entities 11
Breath switches the instruction message of failure；
When the RRC entities 11 obtain the SN information, specifically for：The RRC entities 11 connect
After receiving the instruction message of the SN information switchings failure, transmitting counter detection Counter Check message
To the UE, also, when the counter detection for receiving the UE transmissions responds Counter Check
During Response message, from the Counter Check Response message SN information is obtained.
It is preferred that the RRC entities 11 are additionally operable to：The SN information is sent into the PDCP realities
Body 12；
The PDCP entities 12 recover the up-downgoing for performing the UE according to the SN information for obtaining
During business, specifically for：The PDCP entities 12 receive the described of the transmission of RRC entities 11
After SN information, according to the SN information, recover the up-downgoing business for performing the UE.
It is preferred that above-mentioned SN information, including for carrying out the SN of current uplink service communication with the UE
Information and the SN information for carrying out current downlink service communication with the UE.
It is preferred that RRC entities 11 and PDCP entities 12, can be realized by hardwares such as processors,
The processor for example can be that centre buries device (CPU), special IC (Application Specific
Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array,
) or CPLD (Complex Programmable Logic Device, CPLD) FPGA.
So as to when UE is switched to target BS by source base station, if SN is switched unsuccessfully, by this
The device that bright embodiment is provided is obtained for entering SN information and the use that trade uplink service communicates with the UE
In the SN information that current downlink service communication is carried out with the UE, and according to it is acquired for it is described
UE enters the SN information of trade uplink service communication and for carrying out current downlink service communication with the UE
SN information, recovers the up-downgoing business for performing the UE, it is ensured that the business of UE is not interrupted, and is improved
Consumer's Experience.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter
Calculation machine program product.Therefore, the present invention can be using complete hardware embodiment, complete software embodiment or knot
Close the form of the embodiment in terms of software and hardware.And, the present invention can be adopted and wherein wrapped at one or more
Computer-usable storage medium containing computer usable program code (including but not limited to magnetic disc store and
Optical memory etc.) on implement computer program form.
The present invention is produced with reference to method according to embodiments of the present invention, equipment (system) and computer program
The flow chart and/or block diagram of product is describing.It should be understood that can by computer program instructions flowchart and
/ or block diagram in each flow process and/or square frame and flow chart and/or the flow process in block diagram and/
Or the combination of square frame.These computer program instructions can be provided to all-purpose computer, special-purpose computer, embedded
The processor of formula processor or other programmable data processing devices is producing a machine so that by calculating
The instruction of the computing device of machine or other programmable data processing devices is produced for realizing in flow chart one
The device of the function of specifying in individual flow process or one square frame of multiple flow processs and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in can guide computer or other programmable datas process to set
In the standby computer-readable memory for working in a specific way so that in being stored in the computer-readable memory
Instruction produce and include the manufacture of command device, command device realization is in one flow process or multiple of flow chart
The function of specifying in one square frame of flow process and/or block diagram or multiple square frames.
These computer program instructions also can be loaded into computer or other programmable data processing devices, made
Obtain and series of operation steps is performed on computer or other programmable devices to produce computer implemented place
Reason, so as to the instruction performed on computer or other programmable devices is provided for realizing in flow chart one
The step of function of specifying in flow process or one square frame of multiple flow processs and/or block diagram or multiple square frames.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these modification and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprising these changes and modification.
Claims (12)
1. sequence number SN switches the processing method of failure, its feature in a kind of user equipment (UE) handoff procedure
It is that the method includes：
The target BS of UE switchings is after the UE is switched to the target BS from source base station, however, it is determined that use
Fail in the SN information switchings that current business communication is carried out with the UE, then the target BS suspends and is somebody's turn to do
The up-downgoing business of UE；
The target BS obtains the SN information；
The target BS recovers the up-downgoing business for performing the UE according to the SN information for obtaining.
2. method according to claim 1, it is characterised in that the target BS includes wireless money
Source controls RRC entities and Paket Data Convergence Protocol PDCP entities.
3. method according to claim 2, it is characterised in that the target BS of the UE passes through
Following manner determines the SN information switchings failure for carrying out current business communication with the UE：
The RRC entities send the UE and have completed from source base station to the mesh to the PDCP entities
The instruction message of mark base station switching；
The PDCP entities are received after the instruction message, however, it is determined that do not receive the source before this
The SN information for carrying out current business communication with the UE that base station sends, it is determined that the SN letters
Breath is switched unsuccessfully.
4. method according to claim 3, it is characterised in that the target BS obtains the SN
Information, specifically includes：
The PDCP entities send the instruction message of the SN information switchings failure to the RRC entities；
The RRC entities are received after the instruction message of the SN information switchings failure, transmitting counter inspection
Counter Check message is surveyed to the UE, also, when the counter for receiving the UE transmissions is detected
During response Counter Check Response message, obtain from the Counter Check Response message
Take the SN information.
5. method according to claim 4, it is characterised in that the target BS is according to obtaining
The SN information, recovers the up-downgoing business for performing the UE, specifically includes：
The SN information is sent to the PDCP entities by the RRC entities；
The PDCP entities recover the up-downgoing business for performing the UE according to the SN information.
6. the method according to the arbitrary claim of Claims 1 to 5, it is characterised in that the SN information,
Including for the SN information of current uplink service communication being carried out with the UE and for carrying out with the UE
The SN information of current downlink service communication.
7. sequence number SN switches the processing meanss of failure, its feature in a kind of user equipment (UE) handoff procedure
It is that the device includes：Radio resource control RRC entity and Paket Data Convergence Protocol PDCP realities
Body；Wherein,
The PDCP entities are used for after the UE is switched to target BS from source base station, however, it is determined that use
Fail in the SN information switchings that current business communication is carried out with the UE, then suspend the up-downgoing of the UE
Business；
The RRC entities are used to determine for carrying out current business with the UE in the PDCP entities
After the SN information switchings failure of communication, the SN information is obtained；
The PDCP entities are additionally operable to the SN information obtained according to the RRC entities, recover to perform
The up-downgoing business of the UE.
8. device according to claim 7, it is characterised in that described device is UE switchings
Target BS.
9. device according to claim 8, it is characterised in that the RRC entities are additionally operable to：To
The PDCP entities send the UE and have completed from source base station to disappear to the instruction that the target BS switches
Breath；
The PDCP entities are determined as follows described for carrying out current business communication with the UE
SN information switchings failure：
The PDCP entities are received after the instruction message, however, it is determined that do not receive the source before this
The SN information for carrying out current business communication with the UE that base station sends, it is determined that the SN letters
Breath is switched unsuccessfully.
10. device according to claim 9, it is characterised in that the PDCP entities are additionally operable to：
The instruction message of the SN information switchings failure is sent to the RRC entities；
When the RRC entities obtain the SN information, specifically for：The RRC entities receive institute
After stating the instruction message of SN information switching failures, transmitting counter detection Counter Check message is to described
UE, also, when the counter detection for receiving the UE transmissions responds Counter Check Response
During message, from the Counter Check Response message SN information is obtained.
11. devices according to claim 10, it is characterised in that the RRC entities are additionally operable to：
The SN information is sent into the PDCP entities；
The PDCP entities recover the industry up and down for performing the UE according to the SN information for obtaining
During business, specifically for：The PDCP entities are received after the SN information that the RRC entities send,
According to the SN information, recover the up-downgoing business for performing the UE.
12. devices according to the arbitrary claim of claim 7～11, it is characterised in that the SN information,
Including for the SN information of current uplink service communication being carried out with the UE and for carrying out with the UE
The SN information of current downlink service communication.
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