CN107371208A - Switching method and device - Google Patents

Switching method and device Download PDF

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Publication number
CN107371208A
CN107371208A CN201610322445.0A CN201610322445A CN107371208A CN 107371208 A CN107371208 A CN 107371208A CN 201610322445 A CN201610322445 A CN 201610322445A CN 107371208 A CN107371208 A CN 107371208A
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China
Prior art keywords
base station
source base
target
timer
connection
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CN201610322445.0A
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Chinese (zh)
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CN107371208B (en
Inventor
吴昱民
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ZTE Corp
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ZTE Corp
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Priority to CN201610322445.0A priority Critical patent/CN107371208B/en
Priority to PCT/CN2017/084251 priority patent/WO2017194021A1/en
Publication of CN107371208A publication Critical patent/CN107371208A/en
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Publication of CN107371208B publication Critical patent/CN107371208B/en
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/38—Connection release triggered by timers

Abstract

The invention provides a kind of switching method and device, wherein, this method includes：User equipment (UE) from source base station into target BS handoff procedure, the source base station is to UE transmission timers configuration information and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the UE and the connection duration of the source base station；After the timer expiry, source base station release and the connection of the UE.Using above-mentioned technical proposal, after solving the problems, such as the UE Stochastic accessing target BS in correlation technique autonomous release source base station connection cause source base station waste of radio resources, timely saved the Radio Resource of source base station.

Description

Switching method and device
Technical field
The present invention relates to wireless communication field, in particular to a kind of switching method and device.
Background technology
In the related art, in current long evolving system (Long Term Evolution, referred to as LTE) in system, user equipment (User Equipment, referred to as UE) when wanting handover-target base station, the method of use is first to be disconnected in source base station, then establishes the switching method (first interrupt and establish afterwards, brake-before-make) of connection in target BS again.The transmitting-receiving that business datum can be produced using above-mentioned technical proposal is interrupted.Therefore third generation cooperative partner program (The 3rd Generation Partnership Project, referred to as 3GPP) discussion group provide new scheme be used for and meanwhile keep UE (first to establish and interrupt afterwards in the connection of source base station and target BS, make-before-brake), the technical scheme interrupted afterwards using first establishing reduces UE lateral incisions and changes interrupt latency.
Fig. 1 is a kind of flow chart of UE switching base station methods in correlation technique, as shown in figure 1, step is as follows：
Step S101, UE reporting measurement reports (Measurement Report) give Internet.
Step S102, source base station (Source eNB) send handover request (Handover Request) and give target BS (Target eNB), (evolved base station, Evolved Node B, referred to as eNB).
Step S103, target BS agree to switching, reply Handover Request Acknowledge (Handover Request Acknowledge).
Step S104, source base station send switching command to UE, i.e. RRC connections reconfigure (RRC Connection Reconfiguration) message, wireless heterogeneous networks (Radio Resource Control, referred to as RRC).UE, which is received, to be remained in that after switching command and is not discharged with the connection of source base station (or source base station), retain source base station is configured to maintenance and the connection of source base station, preserves the connection for being configured to subsequently build on target BS (or target BS) of target BS.
Step S105, source base station initiate data forwarding process, send numbering state transfer information (5a.SN Status Transfer) and give target BS, and give data forwarding (5b.Data forwarding) to target BS.
Step S106, UE is while keeping and source base station data transfer, the random access procedure in target is initiated, random access request is sent to target BS by Physical Random Access Channel (Physical Random Access Channel, referred to as PRACH).
Step S107, target BS reply accidental access response message (Random Access Response, referred to as RAR) to UE.UE is disconnected after the response is received and the connection of source base station, and its layer 2 (layer-2) entity is rebuild using the configuration of the target BS received in S104.
Step S108, UE transmission RRC connection configurations complete information (RRC Connection Reconfiguration Complete) and give target BS.
Step S109, target BS instruction source base station release eat dishes without rice or wine to be connected with UE's, i.e. UE contexts release (UE Context Release) message.
Fig. 2 is the structure chart of layer 2 (layer-2) entity of the UE in correlation technique, as shown in Fig. 2 the entity includes：Packet data convergence protocol (Packet Data Convergence Protocol, referred to as PDCP)；Wireless spread-spectrum technology (Radio Link Control, referred to as RLC)；Medium education (Medium Access Control, referred to as MAC).
In the related art, the failure in handoff procedure include it is following two in the case of, one kind is Radio Link Failure：Including following 3 kinds of subtype：1) physical layer lock-out；2) random access failure of MAC layer；3) maximum retransmission that reaches of rlc layer indicates.The situation of another handoff failure is to be not successfully completed switching at the appointed time.
For the problem of independently connection of release source base station causes source base station waste of radio resources after the UE Stochastic accessing target BS in correlation technique, there is presently no effective solution.
The content of the invention
The embodiments of the invention provide a kind of switching method and device, at least to solve the problems, such as that independently the connection of release source base station causes source base station waste of radio resources after UE Stochastic accessings target BS in correlation technique.
According to one embodiment of present invention, there is provided a kind of switching method, including：User equipment (UE) from source base station into target BS handoff procedure, the source base station is to UE transmission timers configuration information and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the UE and the connection duration of the source base station；After the expiry of the timer, the source base station release and the connection of the UE.
Optionally, the source base station sends switching command to the UE, wherein, the timer configuration information is carried in the switching command and/or keeps the instruction being connected with source base station, the switching command is used to indicate that the UE switches to target BS by the source base station.
Optionally, after the source base station sends switching command to the UE, the source base station receives the announcement information that the target BS issues, wherein, the announcement information is used to notify the source base station release and the connection of the UE；The source base station notifies the UE releases and the connection of the source base station.
Optionally, before the instruction that source base station is connected to UE transmission timers configuration information and/or holding with source base station, the timer configuration information and/or the instruction for keeping being connected with source base station are sent to target BS by the source base station；The source base station receives the target BS return information, wherein, the return information is used to indicate that the target BS receives the timer configuration information and/or keeps the instruction being connected with source base station.
Optionally, before the timer expiry and/or before UE releases and the connection of source base station, the source base station keeps connecting by the Data Radio Bearer DRB and UE.
According to one embodiment of present invention, there is provided a kind of switching method, including：User equipment (UE) from source base station into target BS handoff procedure, target BS receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the connection duration of UE and source base station；Before the timer expiry and/or before UE releases and the connection of source base station, the target BS is communicated by SRB and the UE；After the expiry of the timer and/or after UE releases and the connection of source base station, the target BS is communicated by SRB and DRB and the UE.
Optionally, before the instruction that target BS receives the timer configuration information of source base station transmission and/or holding is connected with source base station, methods described also includes：Target BS sends accidental access response to UE；The target BS receives the control plane signaling that the UE is sent, wherein, the control plane signaling includes：RRC connections reconfigure completion message；The target BS notice source base station release and UE connection, the target BS notify the UE releases and the connection of source base station.
According to one embodiment of present invention, there is provided a kind of switching method, including：User equipment (UE) from source base station into target BS handoff procedure, UE receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for the connection duration for configuring the UE and source base station；After the expiry of the timer, the UE releases and the connection of the source base station.
Optionally, the UE receives the switching command that the source base station is sent, wherein, the switching command carries the timer configuration information and/or keeps the instruction being connected with source base station, and the switching command is used to indicate that the UE switches to target BS by the source base station.
Optionally, before the timer expiry and/or before UE releases and the connection of source base station, the UE keeps connection by Data Radio Bearer DRB and the source base station.
Optionally, after the switching command that the UE receives that source base station is sent, the UE receives the accidental access response of target BS, and the UE reconfigures Signaling Radio Bearer SRB according to the target BS configuration information in the switching command.
Optionally, after the UE reconfigures the SRB, the UE is that the SRB establishes independent MAC entity, or, the SRB and DRB of the UE share same MAC entity.
Optionally, in the case where the SRB and the DRB share same MAC entity, data of the UE from the uplink authorization information that the target BS receives for the SRB are sent, and data of the UE from the uplink authorization information that the source base station receives for the DRB are sent；The buffer status report BSR that the UE triggered and reported the target BS is only data cached including SRB, and the BSR that the UE triggered and reported the source base station is only data cached including DRB.
Optionally, the UE will control plane signaling to be sent to target BS, wherein, the control plane signaling includes：RRC connections reconfigure completion message；The UE receives the notification message of target BS or source base station, wherein, the notification message is used to notify the UE releases and the connection of source base station.
Optionally, after the accidental access response that the UE receives the target BS, methods described also includes：Before the timer expiry and/or before UE releases and the connection of source base station, the UE is carried out data transmission by SRB and the target BS；After the expiry of the timer and/or after UE releases and the connection of source base station, the UE is carried out data transmission by the SRB and DRB and the target BS.
Optionally, methods described also includes：After the expiry of the timer, the UE reconfigures radio bearer RB according to the target BS configuration information in the switching command.
Optionally, before the UE reconfigures RB, methods described also includes：In the case where the SRB and DRB of the UE use identical MAC entity, the UE reconfigures the DRB and SRB entity of layer 2 using the target BS configuration information；In the case where the SRB and DRB of the UE use different MAC entities, the UE is rebuild using the target BS configuration information to the entity of layer corresponding to DRB 2；After MAC entity corresponding to UE release SRB and by the SRB reconfigure for the DRB identicals MAC entity, or, after the entity of layer 2 corresponding to the UE releases SRB and rebuild the SRB and be and the DRB identicals MAC entity.
Optionally, after the UE reconfigures the RB, methods described also includes：The BSR of UE triggering and the data including the DRB and the SRB are reported, the uplink authorization for the target BS that the UE the is received while data available for the DRB and SRB are sent.
Optionally, after the switching command that the UE receives that source base station is sent, methods described also includes：The UE establishes the connection with target BS using target BS configuration information, and in the case where establishing connection failure with target BS, the UE keeps the connection with source base station, and the UE discharges the target BS configuration information.
Optionally, the configured information for establishing connection failure includes one below type：Handoff failure；Random access failure；Physical layer RLM detection failures；RLC retransmits failure.
According to another embodiment of the invention, there is provided a kind of switching device, applied to source base station, including：Sending module, for user equipment (UE) from source base station into target BS handoff procedure, the sending module is to UE transmission timers configuration information and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the UE and the connection duration of the source base station；First release module, for after the expiry of the timer, the source base station to discharge the connection with the UE.
According to another embodiment of the invention, there is provided a kind of switching device, applied to target BS, including：First receiving module, for user equipment (UE) from source base station into target BS handoff procedure, first receiving module receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the connection duration of UE and source base station；Communication module, for before the timer expiry and/or before UE releases and the connection of source base station, the target BS to be communicated by SRB and the UE；The communication module is additionally operable to after the expiry of the timer and/or after UE releases and the connection of source base station, and the target BS is communicated by SRB and DRB and the UE.
According to another embodiment of the invention, there is provided a kind of switching device, applied to UE, including：Second receiving module, for user equipment (UE) from source base station into target BS handoff procedure, second receiving module receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for the connection duration for configuring the UE and source base station；Second release module, for after the expiry of the timer, the UE to discharge the connection with the source base station.
According to still another embodiment of the invention, a kind of storage medium is additionally provided.The storage medium is arranged to the program code that storage is used to perform following steps：
User equipment (UE) from source base station into target BS handoff procedure, the source base station is to UE transmission timers configuration information and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the UE and the connection duration of the source base station；
After the expiry of the timer, the source base station release and the connection of the UE.
Alternatively, storage medium is also configured to the program code that storage is used to perform following steps：
User equipment (UE) from source base station into target BS handoff procedure, target BS receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the connection duration of UE and source base station；
Before the timer expiry and/or before UE releases and the connection of source base station, the target BS is communicated by SRB and the UE；After the expiry of the timer and/or after UE releases and the connection of source base station, the target BS is communicated by SRB and DRB and the UE.
Alternatively, storage medium is also configured to the program code that storage is used to perform following steps：
User equipment (UE) from source base station into target BS handoff procedure, UE receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for the connection duration for configuring the UE and source base station；After the expiry of the timer, the UE releases and the connection of the source base station.
Pass through the present invention, during UE applies for switching base station, source base station is to UE and the equal transmission timer configuration information of target BS and/or keeps the instruction being connected with source base station, the timer configuration information is used to set the timer that source base station is connected duration with UE, target BS and UE perform respective operation respectively after receiving timer configuration information, after timer expiry, source base station release and UE connection.Configuration information according to timer, source base station releases and had been switched in time the UE of target BS connection, autonomous release source base station connection causes source base station waste of radio resources after solving the problems, such as the UE Stochastic accessing target BS in correlation technique, has timely saved the Radio Resource of source base station.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, and schematic description and description of the invention is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of flow chart of UE switching base station methods in correlation technique；
Fig. 2 is the structure chart of layer 2 (layer-2) entity of the UE in correlation technique；
Fig. 3 is a kind of flow chart one of switching method according to embodiments of the present invention；
Fig. 4 is a kind of flowchart 2 of switching method according to embodiments of the present invention；
Fig. 5 is a kind of flow chart 3 of switching method according to embodiments of the present invention；
Fig. 6 is the flow chart according to a kind of switching method based on timer of alternative embodiment of the present invention；
Fig. 7 is schemed according to a kind of SRB that reconfigures of switching method based on timer of alternative embodiment of the present invention；
Fig. 8 is to start timer flow chart according to a kind of UE of switching method based on timer of alternative embodiment of the present invention；
Fig. 9 is schemed according to a kind of DRB that reconfigures of switching method based on timer of alternative embodiment of the present invention；
Figure 10 is the flow chart according to a kind of switching method based on release instruction of alternative embodiment of the present invention；
Figure 11 is according to a kind of process chart of handoff failure of alternative embodiment of the present invention, as shown in figure 11；
Figure 12 is the processing figure of layer 2 according to a kind of handoff failure of alternative embodiment of the present invention；
Figure 13 is a kind of structured flowchart of switching device applied to source base station according to embodiments of the present invention；
Figure 14 is a kind of structured flowchart of switching device applied to target BS according to embodiments of the present invention；
Figure 15 is a kind of structured flowchart of switching device applied to UE according to embodiments of the present invention.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can be mutually combined.
It should be noted that term " first ", " second " in description and claims of this specification and above-mentioned accompanying drawing etc. is for distinguishing similar object, without for describing specific order or precedence.
Random access procedure refers to the process of that sending random access lead code from user begins attempt to access network to before setting up basic signaling connection network.
Embodiment 1
The embodiment of the present application can run on long evolving system (Long Term Evolution, referred to as LTE) in system, (including but is not limited to LTE system), the network architecture of the grid can include network side equipment (such as base station) and terminal.A kind of switching base station methods that can run in the above-mentioned network architecture are provided in the present embodiment, it is necessary to illustrate, the running environment of the above-mentioned switching base station methods provided in the embodiment of the present application is not limited to the above-mentioned network architecture.
A kind of switching method is provided in the present embodiment, and Fig. 3 is a kind of flow chart one of switching method according to embodiments of the present invention, as shown in figure 3, the flow comprises the following steps：
Step S302, user equipment (UE) from source base station into target BS handoff procedure, the source base station is to UE transmission timers configuration information and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the UE and the connection duration of the source base station；
Step S304, after the timer expiry, source base station release and the connection of the UE.
Optionally, the source base station sends switching command to the UE, wherein, the timer configuration information is carried in the switching command and/or keeps the instruction being connected with source base station, the switching command is used to indicate that the UE switches to target BS by the source base station.During UE switchings base station, the up transmission resource allocation information that source base station can be connected to target base station requests UE with target BS, source base station can be carried on configuration information in switching command after above-mentioned configuration information is received and be handed down to UE, and the timer configuration information of above-described embodiment can also be carried with being together handed down to UE in switching command.
Optionally, after the source base station sends switching command to the UE, the source base station receives the announcement information that the target BS issues, wherein, the announcement information is used to notify source base station release and the connection of the UE；The source base station notifies UE releases and the connection of the source base station.It should be noted that after the notified information of source base station in the present embodiment, announcement information is transmitted to UE first, then discharges the connection with the UE again.What the present embodiment was recorded is in the case where source base station does not issue timer configuration information to UE, and by the release of target BS voluntary notice source base station and UE connection, for UE sides, target BS or source base station also notify the release of UE sides and the connection of source base station.
Optionally, before the instruction that source base station is connected to UE transmission timers configuration information and/or holding with source base station, the timer configuration information and/or the instruction for keeping being connected with source base station are sent to target BS by the source base station；The source base station receives the target BS return information, wherein, the return information is used to indicate that the target BS receives the timer configuration information and/or keeps the instruction being connected with source base station.Source base station sends timer configuration information the operation responded to target BS, target BS according to above-mentioned configuration information.
Optionally, before the timer expiry and/or before UE releases and the connection of source base station, keep connecting by the Data Radio Bearer DRB and UE.
According to one embodiment of present invention, there is provided a kind of switching method, Fig. 4 is a kind of flowchart 2 of switching method according to embodiments of the present invention, as shown in figure 4, the flow comprises the following steps：
Step S402, user equipment (UE) from source base station into target BS handoff procedure, target BS receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the connection duration of UE and source base station；
Step S404, before the timer expiry and/or before UE releases and the connection of source base station, the target BS is communicated by SRB and the UE；After the timer expiry and/or after UE releases and the connection of source base station, the target BS is communicated by SRB and DRB and the UE.
Receive source base station send timer configuration information and/or keep with source base station connection instruction timer expiry before and/or UE discharge and source base station connection before the present embodiment it is corresponding with above-described embodiment, target BS after the timer configuration information of source base station transmission is received, before the timeout with after time-out with UE connection in different ways.
Optionally, before the instruction that target BS receives the timer configuration information of source base station transmission and/or holding is connected with source base station, this method also includes：Target BS sends accidental access response to UE；The target BS receives the control plane signaling of UE transmissions, wherein, the control plane signaling includes：RRC connections reconfigure completion message；Target BS notice source base station release and UE connection, the target BS notify UE releases and the connection of source base station.What the present embodiment was recorded is in the case where target BS is not received by the timer configuration information of source base station transmission, target BS mutually discharges mutual connection after the RRC connections for receiving UE reconfigure completion message, by the spontaneous notice source base station of target BS and UE.
According to one embodiment of present invention, there is provided a kind of switching method, Fig. 5 is a kind of flow chart 3 of switching method according to embodiments of the present invention, as shown in figure 5, the flow comprises the following steps：
Step S502, user equipment (UE) from source base station into target BS handoff procedure, UE receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the connection duration of the UE and source base station；
Step S504, after the timer expiry, UE releases and the connection of the source base station.
The instruction that the timer configuration information and/or holding that reception source base station is sent are connected with source base station is optional, the UE receives the switching command of source base station transmission, wherein, the switching command carries the timer configuration information and/or keeps the instruction being connected with source base station, and the switching command is used to indicate that the UE switches to target BS by the source base station.During UE switches base station, UE is bound to receive the switching command for being used to indicate target BS configuration information sent by source base station, and above-mentioned timer configuration information can be carried in the switching command.
Optionally, before the timer expiry and/or before UE releases and the connection of source base station, the UE keeps connection by Data Radio Bearer DRB and the source base station.
Optionally, after the switching command that the UE receives that source base station is sent, the UE receives the accidental access response of target BS, and the UE reconfigures Signaling Radio Bearer SRB according to the target BS configuration information in the switching command.Radio bearer includes SRB and DRB, and in the case where DRB is used to be connected with source base station, UE reconfigures SRB.
Optionally, after the UE reconfigures the SRB, the UE is that the SRB establishes independent MAC entity, or, the SRB and DRB of the UE share same MAC entity.Optionally, in the case where the SRB and the DRB share same MAC entity, data of the UE from the uplink authorization information that the target BS receives for the SRB are sent, and data of the UE from the uplink authorization information that the source base station receives for the DRB are sent；The buffer status report BSR that the UE triggered and reported the target BS is only data cached including SRB, and the BSR that the UE triggered and reported the source base station is only data cached including DRB.
Optionally, the UE will control plane signaling to be sent to target BS, wherein, the control plane signaling includes：RRC connections reconfigure completion message；The UE receives the notification message of target BS or source base station, wherein, the notification message is used to notify UE releases and the connection of source base station.What the present embodiment was recorded be UE in the case where being not received by the timer configuration information that source base station issues, directly carry out information communication with target BS, by target BS notify UE and source base station both sides discharge respectively between connection.
Optionally, after the UE receives the accidental access response of the target BS, before the timer expiry and/or before UE releases and the connection of source base station, the UE is carried out data transmission by SRB and the target BS；After the timer expiry and/or after UE releases and the connection of source base station, the UE is carried out data transmission by the SRB and DRB and the target BS.
Optionally, after the timer expiry, the UE reconfigures radio bearer RB according to the target BS configuration information in the switching command.Optionally, before the UE reconfigures RB, in the case where the SRB and DRB of the UE use identical MAC entity, the UE reconfigures the DRB and SRB entity of layer 2 using the target BS configuration information；In the case where the SRB and DRB of the UE use different MAC entities, the UE is rebuild using the target BS configuration information to the entity of layer corresponding to DRB 2；Corresponding to UE releases SRB after MAC entity and by the SRB reconfigure for the DRB identical MAC entities, or, after the entity of layer 2 corresponding to UE releases SRB and rebuild the SRB and be and the DRB identical MAC entities.The UE that above-described embodiment is recorded reconfigures radio bearer RB detailed step, and SRB and DRB have a kind of method for reconfiguration, SRB and DRB to have two kinds of method for reconfiguration in the case of using different MAC entities in the case of using identical MAC entity.
Optionally, after the UE reconfigures the RB, the BSR of UE triggering and the data including the DRB He the SRB are reported, the uplink authorization for the target BS that the UE the is received while data available for the DRB and SRB are sent.
Optionally, after the switching command that the UE receives that source base station is sent, the UE establishes the connection with target BS using target BS configuration information, in the case where establishing connection failure with target BS, the UE keeps the connection with source base station, and the UE discharges the target BS configuration information.Unavoidable during UE switches base station to there is a situation where to switch base station failure, have failed if being switched to target BS, UE keeps connecting with source base station, and afterwards, network side can switch base station process with retriggered UE.Optionally, this in above-described embodiment, which establishes the configured information of connection failure, includes one below type：Handoff failure；Random access failure；Physical layer RLM detection failures；RLC retransmits failure.
Fig. 6 is according to a kind of flow chart of switching method based on timer of alternative embodiment of the present invention, as shown in fig. 6, step is as follows：
" timer for keeping UE to be connected in source base station " configuration information is sent to target BS by step S601, source base station (equivalent to the timer configuration information in above-described embodiment), and the configuration information can include：The expectation duration of timer.Configuration information instruction will keep connections of the UE in source base station.(as shown in S601 in Fig. 6 " " Timer " in Handover Request " message configuration and " Remain Connection Indication " instruction)
Step S602, target BS setting " timer for keeping UE to be connected in source base station " configuration, setting instruction UE will be maintained at the connection of source base station, and be sent to source base station.(as shown in S602 in Fig. 6 " " Timer " in Handover Request Acknowledge " message configuration and " Remain Connection Indication " instructions)
Step S603, source base station is when switching command is issued by " timer for keeping UE to be connected in source base station " configuration distributing to UE, the instruction that will remain in source base station connection is handed down to UE, the overtime moment of source base station record UE " timer for keeping UE to be connected in source base station ", source base station carries out data transmit-receive by DRB and UE before the timer expiry, the source base station release UE source base station connection after the timer expiry.(as shown in S603 in Fig. 6 " " Timer " in RRC Connection Reconfiguration " message configuration and " Remain Connection Indication " instructions) (after Fig. 8, there is the step record that Fig. 6 is follow-up)
After UE receives switching command, start " timer that holding UE connects in source base station ", and the connection with source base station is kept before " timer for keeping UE to be connected in source base station " time-out, and row data communication is entered by DRB and source base station.
Fig. 7 is schemed according to a kind of SRB that reconfigures of switching method based on timer of alternative embodiment of the present invention, as shown in fig. 7, UE is reconfigured SRB according to the configuration information of Target cell.Reconfiguring for the SRB can have following two modes：
Mode 1 (method method1 in such as Fig. 7):UE SRB and DRB shares same MAC entity, and data of the UE from the uplink authorization information that target BS receives for SRB are sent, and the data from the uplink authorization information that source base station receives for DRB are sent.The BSR that UE triggered and reported target BS only includes the data cached of SRB, and the BSR that UE triggered and reported source base station only includes the data cached of DRB.
Mode 2 (method2 in such as Fig. 7):UE can be that the SRB establishes independent MAC entity, and the MAC entity corresponds to the connection of target BS.
Fig. 8 is to start timer flow chart according to a kind of UE of switching method based on timer of alternative embodiment of the present invention, as shown in Figure 8：UE includes the total duration (Toverall) of the timer in the configuration of t1 receptions to the timer.UE is at the t2 moment, because the processing for information is delayed (Tue), cause UE could to start the timer at the t2 moment, therefore UE is when timer is started, the processing delay that the overtime duration of timer should exclude UE is (Toverall-Tue).
As shown in fig. 6, in Fig. 6 subsequent step：
Step S604, source base station initiate the data forwarding process to target BS.(in such as Fig. 6 S604 " SN Status Transfer " and S601 " Data Forwarding ")
Step S605, UE initiate the random access procedure to target BS.(S605 " PRACH " in such as Fig. 6)
Step S606, target BS reply accidental access response.(S606 " RAR " in such as Fig. 6)
Step S607, UE reports the residual time length of " keep UE connect in source base station timer " to target BS, (in such as Fig. 6 S607 " RRC Connection Reconfiguration Complete " " " Tremain " in Remaining Time " and Fig. 8).The residual time length can be additionally include UE timer expiries after the entity of layer 2 is reconfigured processing delay (Tlayer2 in such as Fig. 8).The residual time length at target BS record UE " timer for keeping UE to be connected in source base station " overtime moment, target BS are communicated before UE " keeping UE in the timer that source base station connects " time-out by SRB and UE.Target BS is communicated after UE " keeping UE in the timer that source base station connects " time-out by SRB and DRB and UE.
Target BS can be handled for the residual time length at UE " timer for keeping UE to be connected in source base station " overtime moment according to Fig. 8 modes：Target BS includes the residual time length (Tremain) of the timer in the configuration of t3 receptions to the timer.Target BS is at the t4 moment, because the processing for information is delayed (TeNB), cause target BS could to obtain the residual time length at the t4 moment, counted from the t4 moment, therefore eNB thinks that the end time at distance t5 moment is (Tremain-TeNB).
Step S608, UE notified after its entity end of layer 2 is reconfigured target BS its reconfigure completion.(in such as Fig. 6 S608 " Reset Confirmation ")
Fig. 9 is schemed according to a kind of DRB that reconfigures of switching method based on timer of alternative embodiment of the present invention, and UE can be according to progress shown in Fig. 9 in the mode for reconfiguring the entity of its layer 2：
If UE SRB is currently configured mode as mode 1 in S603, UE reconfigures the DRB and SRB entity of layer 2 using the configuration of target BS.
If UE SRB is currently configured mode as mode 2 in S603, UE is rebuild using the configuration of target BS to the entity of layer corresponding to DRB 2, MAC entity corresponding to UE releases SRB by the SRB reconfigure for DRB identical MAC entities, or rebuild the SRB corresponding to UE releases SRB after the entity of layer 2 again and be and DRB identical MAC entities.
Figure 10 is that as shown in Figure 10, step is as follows according to a kind of flow chart of switching method based on release instruction of alternative embodiment of the present invention：
Step S1001, source base station send handover request to target BS.And indicate to keep connections of the UE in source base station.(as shown in S1001 in Figure 10 " in Handover Request " message " Remain Connection Indication " instruction)
Step S1002, target BS sends switching request response to source base station, and indicates that UE will be maintained at the connection of source base station.(as shown in S1002 in Figure 10 " in Handover Request Acknowledge " message " Remain Connection Indication " instructions)
Step S1003, the instruction that source base station will remain in source base station connection when switching command is issued are handed down to UE, and source base station carries out data transmit-receive by DRB and UE.(as shown in S1003 in Figure 10 " in RRC Connection Reconfiguration " message " Remain Connection Indication " instructions)
After UE receives switching command, the connection with source base station is kept, and row data communication is entered by DRB and source base station.UE is reconfigured SRB according to the configuration information of Target cell, and the SRB's reconfigures mode with the mode described in S603.
Step S1004, source base station initiate the data forwarding process to target BS.(in such as Figure 10 S1004 " SN Status Transfer " and S1004 " Data Forwarding ")
Step S1005, UE initiate the random access procedure to target BS.(S1005 " PRACH " in such as Figure 10)
Step S1006, target BS reply accidental access response.(S1006 " RAR " in such as Figure 10)
RRC connections are reconfigured completion message and report target BS by step S1007, UE, (in such as Figure 10 S1007 " RRC Connection Reconfiguration Complete ").Target BS is communicated by SRB and UE.
Step S1008, target BS notice source base station release UE source base station connection.(in such as Figure 10 S1008 " UE Context Release " message)
Step S1009, source base station release UE source base station connection, notifies target BS releasing result.(in such as Figure 10 S1009 " Release Confirmation " message)
Step S1010, the connection of target BS notice UE release source base stations.(in such as Figure 10 S1010 " in RRC Connection Reconfiguration " message " Release Indication " instructions)
Step S1011, UE discharges the connection of source base station, reconfigures its entity of layer 2, and sends confirmation message notice target BS.(in such as Figure 10 " RRC Connection Reconfiguration Complete " message)
UE reconfigures the mode that the mode of the entity of its layer 2 is recorded with S608.
Figure 11 is according to a kind of process chart of handoff failure of alternative embodiment of the present invention, as shown in figure 11.
Step S1101, source base station issue switching command to UE, and indicate to be maintained at the connection of source base station.UE reconfigures the mode that SRB mode is recorded with S603.
Step S1102, if UE is kept there occurs the failure of wireless connection, UE in handoff procedure and the data of source base station communicate, connection re-establishment process is not triggered, UE reports failure to be indicated to network side, and the failure configured information can include specific Fail Type：Handoff failure；Random access failure；Physical layer RLM detection failures；RLC retransmits failure.UE discharges the configuration information of target BS.(in such as Figure 11 S1102 " Failure Indication " message)
Figure 12 is the processing figure of layer 2 according to a kind of handoff failure of alternative embodiment of the present invention, and as shown in figure 12, UE layer 2 can be handled according to Figure 12 modes：
Mode 1：If SRB and DRB current UE shares same MAC entity, UE reconfigures SRB entities with the configuration information of source base station.
Mode 2：If UE SRB and DRB are to use different MAC entities, UE is reconfigured using the configuration of source base station to SRB, MAC entity corresponding to UE releases SRB by the SRB reconfigure for DRB identical MAC entities, or rebuild the SRB corresponding to UE releases SRB after the entity of layer 2 again and be and DRB identical MAC entities.
After source base station receives UE instructions, other cells can be selected to switch over UE.
Through the above description of the embodiments, those skilled in the art can be understood that the mode of general hardware platform necessary to can add according to the method for above-described embodiment by software to realize, can certainly be by hardware, but the former is more preferably embodiment in many cases.Based on such understanding, the part that technical scheme substantially contributes to prior art in other words can be embodied in the form of software product, the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions make it that a station terminal equipment (can be mobile phone, computer, server, or network equipment etc.) perform the method that each embodiment of the present invention is somebody's turn to do.
Embodiment 2
A kind of switching device is additionally provided in the present embodiment, and the device is used to realize above-described embodiment and preferred embodiment, has carried out repeating no more for explanation.As used below, term " module " can realize the combination of the software and/or hardware of predetermined function.Although device described by following examples is preferably realized with software, hardware, or software and hardware combination realization and may and be contemplated.
Figure 13 is a kind of structured flowchart of switching device applied to source base station according to embodiments of the present invention, and as shown in figure 13, the device includes：
Sending module 132, for user equipment (UE) from source base station into target BS handoff procedure, the sending module 132 is to UE transmission timers configuration information and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the UE and the connection duration of the source base station；
First release module 134, it is connected with the sending module 132, for after the timer expiry, the source base station to discharge the connection with the UE.
Figure 14 is a kind of structured flowchart of switching device applied to target BS according to embodiments of the present invention, and as shown in figure 14, the device includes：
First receiving module 142, for user equipment (UE) from source base station into target BS handoff procedure, first receiving module 142 receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the connection duration of UE and source base station；
Communication module 144, it is connected with first receiving module 142, for before the timer expiry and/or before UE releases and the connection of source base station, the target BS to be communicated by SRB and the UE；The communication module is additionally operable to after the timer expiry and/or UE releases are with after the connection of source base station, and the target BS is communicated by SRB and DRB and the UE.
Figure 15 is a kind of structured flowchart of switching device applied to UE according to embodiments of the present invention, and as shown in figure 15, the device includes：
Second receiving module 152, for user equipment (UE) from source base station into target BS handoff procedure, second receiving module 152 receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the connection duration of the UE and source base station；
Second release module 154, it is connected with second receiving module 152, for after the timer expiry, the UE to discharge the connection with the source base station.
It should be noted that above-mentioned modules can be realized by software or hardware, for the latter, can be accomplished by the following way, but not limited to this：Above-mentioned module is respectively positioned in same processor；Or the form of above-mentioned modules in any combination is located in different processors respectively.
Embodiment 3
Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can be configured to the program code that storage is used to perform following steps：
S1, user equipment (UE) from source base station into target BS handoff procedure, the source base station is to UE transmission timers configuration information and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the UE and the connection duration of the source base station；
S2, after the timer expiry, source base station release and the connection of the UE；
Above-mentioned storage medium can be configured to the program code that storage is used to perform following steps：
S3, user equipment (UE) from source base station into target BS handoff procedure, target BS receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the connection duration of UE and source base station；
S4, before the timer expiry and/or before UE releases and the connection of source base station, the target BS is communicated by SRB and the UE；After the timer expiry and/or after UE releases and the connection of source base station, the target BS is communicated by SRB and DRB and the UE.
Above-mentioned storage medium can be configured to the program code that storage is used to perform following steps：
S5, user equipment (UE) from source base station into target BS handoff procedure, UE receives the timer configuration information of source base station transmission and/or keeps the instruction being connected with source base station, wherein, the timer configuration information is used for the timer for configuring the connection duration of the UE and source base station；
S6, after the timer expiry, UE releases and the connection of the source base station.
Alternatively, in the present embodiment, above-mentioned storage medium can include but is not limited to：USB flash disk, read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with the medium of store program codes.
Alternatively, in the present embodiment, processor performs the method and step of above-described embodiment record according to the program code stored in storage medium.
Alternatively, the specific example in the present embodiment may be referred to the example described in above-described embodiment and optional embodiment, and the present embodiment will not be repeated here.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the invention or each step can be realized with general computing device, they can be concentrated on single computing device, or it is distributed on the network that multiple computing devices are formed, alternatively, they can be realized with the program code that computing device can perform, so as to, it can be stored in storage device and be performed by computing device, and in some cases, can be with the step shown or described by being performed different from order herein, or they are fabricated to each integrated circuit modules respectively, or the multiple modules or step in them are fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art, the present invention there can be various modifications and variations.Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection.

Claims (23)

  1. A kind of 1. switching method, it is characterised in that including：
    User equipment (UE) from source base station into target BS handoff procedure, the source base Stand to UE transmission timers configuration information and/or keep the instruction being connected with source base station, its In, the timer configuration information is used for the connection for configuring the UE and the source base station The timer of duration；
    After the expiry of the timer, the source base station release and the connection of the UE.
  2. 2. according to the method for claim 1, it is characterised in that methods described is also Including：
    The source base station sends switching command to the UE, wherein, the switching command In carry the timer configuration information and/or keep the instruction that is connected with source base station, institute Switching command is stated to be used to indicate that the UE switches to target BS by the source base station.
  3. 3. according to the method for claim 2, it is characterised in that in the source base Stand after sending switching command to the UE, methods described also includes：
    The source base station receives the announcement information that the target BS issues, wherein, it is described Announcement information is used to notify the source base station release and the connection of the UE；
    The source base station notifies the UE releases and the connection of the source base station.
  4. 4. according to the method for claim 1, it is characterised in that source base station to Before the instruction that UE transmission timers configuration information and/or holding are connected with source base station, institute Stating method also includes：
    The source base station is by the timer configuration information and/or keeps being connected with source base station Instruction be sent to target BS；
    The source base station receives the target BS return information, wherein, it is described to reply letter Cease for indicate the target BS receive the timer configuration information and/or keep with The instruction of source base station connection.
  5. 5. according to the method for claim 1, it is characterised in that methods described is also Including：
    Before the timer expiry and/or before UE releases and the connection of source base station, The source base station keeps connecting by the Data Radio Bearer DRB and UE.
  6. A kind of 6. switching method, it is characterised in that including：
    User equipment (UE) from source base station into target BS handoff procedure, target BS Receive the timer configuration information of source base station transmission and/or keep the finger being connected with source base station Show, wherein, when the timer configuration information is used to configure the connection of UE and source base station Long timer；
    Before the timer expiry and/or before UE releases and the connection of source base station, The target BS is communicated by SRB and the UE；In the timer expiry Afterwards and/or after UE releases and the connection of source base station, the target BS passes through SRB Communicated with DRB and the UE.
  7. 7. according to the method for claim 6, it is characterised in that in target BS Receive the timer configuration information of source base station transmission and/or keep the finger being connected with source base station After showing, methods described also includes：
    Target BS carries timer configuration information in the switching command sent to source base station And/or keep the instruction being connected with source base station；
    Target BS sends accidental access response to UE；
    The target BS receives the control plane signaling that the UE is sent, wherein, it is described Control plane signaling includes：RRC connections reconfigure completion message；
    The target BS notice source base station release and UE connection, the target BS Notify the UE releases and the connection of source base station.
  8. A kind of 8. switching method, it is characterised in that including：
    User equipment (UE) from source base station into target BS handoff procedure, UE receive source The timer configuration information and/or keep the instruction being connected with source base station that base station is sent, wherein, The connection duration that the timer configuration information is used to configure the UE and source base station is determined When device；
    After the expiry of the timer, the UE releases and the connection of the source base station.
  9. 9. according to the method for claim 8, it is characterised in that methods described is also Including：
    The UE receives the switching command that the source base station is sent, wherein, the switching Order carries the timer configuration information and/or keeps the instruction being connected with source base station, The switching command is used to indicate that the UE switches to target BS by the source base station.
  10. 10. according to the method for claim 8, it is characterised in that methods described is also Including：
    Before the timer expiry and/or before UE releases and the connection of source base station, The UE keeps connection by Data Radio Bearer DRB and the source base station.
  11. 11. according to the method for claim 8, it is characterised in that methods described is also Including：
    After the switching command that the UE receives that source base station is sent, the UE is received To the accidental access response of target BS, the UE is according to the mesh in the switching command Mark base station configuration information reconfigures Signaling Radio Bearer SRB.
  12. 12. according to the method for claim 11, it is characterised in that methods described Also include：
    After the UE reconfigures the SRB, the UE establishes for the SRB Independent MAC entity, or, the SRB and DRB of the UE share same MAC Entity.
  13. 13. according to the method for claim 12, it is characterised in that methods described Also include：
    In the case where the SRB and the DRB share same MAC entity, institute State the data that the uplink authorization information that UE receives from the target BS is used for the SRB Send, the uplink authorization information that the UE receives from the source base station is used for the DRB Data send；
    The UE is triggered and is reported the buffer status report BSR of the target BS only Including the data cached of SRB, the UE triggerings and the BSR for reporting the source base station It is only data cached including DRB.
  14. 14. according to the method for claim 13, it is characterised in that methods described Also include：
    The UE will control plane signaling to be sent to target BS, wherein, the chain of command Signaling includes：RRC connections reconfigure completion message；
    The UE receives the notification message of target BS or source base station, wherein, it is described Notification message is used to notify the UE releases and the connection of source base station.
  15. 15. according to the method for claim 11, it is characterised in that in the UE After the accidental access response for receiving the target BS, methods described also includes：
    Before the timer expiry and/or before UE releases and the connection of source base station, The UE is carried out data transmission by SRB and the target BS；
    After the expiry of the timer and/or after UE releases and the connection of source base station, The UE is carried out data transmission by the SRB and DRB and the target BS.
  16. 16. according to the method for claim 8, it is characterised in that methods described is also Including：
    After the expiry of the timer, the UE is according to the mesh in the switching command Mark base station configuration information reconfigures radio bearer RB.
  17. 17. according to the method for claim 16, it is characterised in that in the UE Before reconfiguring RB, methods described also includes：
    In the case where the SRB and DRB of the UE use identical MAC entity, The UE reconfigures DRB and SRB layer 2 using the target BS configuration information Entity；
    In the case where the SRB and DRB of the UE use different MAC entities, The UE is carried out using the target BS configuration information to the entity of layer corresponding to DRB 2 Rebuild；
    In the case where the SRB and DRB of the UE use different MAC entities, After MAC entity corresponding to UE release SRB and by the SRB reconfigure for and institute DRB identical MAC entities are stated, or, layer 2 corresponding to the UE releases SRB After entity and rebuild the SRB be and the DRB identicals MAC entity.
  18. 18. according to the method for claim 17, it is characterised in that in the UE After the RB is reconfigured, methods described also includes：
    The BSR of UE triggering and report the number including the DRB and the SRB According to, the uplink authorization for the target BS that the UE is received while available for described DRB and the SRB data are sent.
  19. 19. according to the method for claim 8, it is characterised in that in the UE After receiving the switching command that source base station is sent, methods described also includes：
    The UE establishes the connection with target BS using target BS configuration information, In the case of establishing connection failure with target BS, the UE keeps the company with source base station Connect, the UE discharges the target BS configuration information, and the UE is on source base station Report establishes the configured information of connection failure with target BS.
  20. 20. according to the method for claim 19, it is characterised in that the foundation The configured information of connection failure includes one below type：Handoff failure；Stochastic accessing loses Lose；Physical layer RLM detection failures；RLC retransmits failure.
  21. A kind of 21. switching device, applied to source base station, it is characterised in that including：
    Sending module, for being switched in user equipment (UE) from source base station to target BS Cheng Zhong, the sending module is to UE transmission timers configuration information and/or keeps and source base Stand connection instruction, wherein, the timer configuration information be used for configure the UE with The timer of the connection duration of the source base station；
    First release module, for after the expiry of the timer, the source base station to be released Put the connection with the UE.
  22. A kind of 22. switching device, applied to target BS, it is characterised in that including：
    First receiving module, for being cut in user equipment (UE) from source base station to target BS During changing, first receiving module receives the timer configuration information that source base station is sent And/or the instruction being connected with source base station is kept, wherein, the timer configuration information is used for Configure the timer of the connection duration of UE and source base station；
    Communication module, for before the timer expiry and/or UE release and source base Before the connection stood, the target BS is communicated by SRB and the UE；Institute State communication module be additionally operable to after the expiry of the timer and/or UE release and source base station Connection after, the target BS is communicated by SRB and DRB and the UE.
  23. A kind of 23. switching device, applied to user equipment (UE) side, it is characterised in that Including：
    Second receiving module, for being cut in user equipment (UE) from source base station to target BS During changing, second receiving module receives the timer configuration information that source base station is sent And/or the instruction being connected with source base station is kept, wherein, the timer configuration information is used for Configure the timer of the connection duration of the UE and source base station；
    Second release module, for after the expiry of the timer, the UE to discharge With the connection of the source base station.
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