CN110035451A - Communication handover method and communication switching device - Google Patents

Communication handover method and communication switching device Download PDF

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Publication number
CN110035451A
CN110035451A CN201810033574.7A CN201810033574A CN110035451A CN 110035451 A CN110035451 A CN 110035451A CN 201810033574 A CN201810033574 A CN 201810033574A CN 110035451 A CN110035451 A CN 110035451A
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CN
China
Prior art keywords
base station
source base
user equipment
target
switching
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Granted
Application number
CN201810033574.7A
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Chinese (zh)
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CN110035451B (en
Inventor
欧阳玉玲
周婷
郦振红
夏欣
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Huizhou TCL Mobile Communication Co Ltd
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Huizhou TCL Mobile Communication Co Ltd
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Application filed by Huizhou TCL Mobile Communication Co Ltd filed Critical Huizhou TCL Mobile Communication Co Ltd
Priority to CN201810033574.7A priority Critical patent/CN110035451B/en
Priority to PCT/CN2018/080260 priority patent/WO2019136827A1/en
Publication of CN110035451A publication Critical patent/CN110035451A/en
Application granted granted Critical
Publication of CN110035451B publication Critical patent/CN110035451B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • 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
    • 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
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points

Abstract

This application discloses a kind of communication handover methods, this method comprises: source base station receives the measurement report of user equipment to report；Source base station judges whether measurement report meets pre-switch condition；If satisfied, then for source base station to user equipment transmission pre-switch instruction, pre-switch instruction is used to indicate user equipment to establish connection with target BS and keep the connection with source base station；Source base station receives the random access success message from target BS, and random access success message is connect for indicating that user equipment is successfully established with target BS；Whether the signal quality of source base station monitoring user equipment side meets practical switching condition；If signal quality meets practical switching condition, source base station executes practical switching to complete to switch.Disclosed herein as well is a kind of communication switching devices.By the above-mentioned means, the application can reduce the break period of handoff procedure.

Description

Communication handover method and communication switching device
Technical field
This application involves the communications fields, more particularly to a kind of communication handover method and communication switching device.
Background technique
Switching (Handover, HO) is one of most basic and most important process in LTE and NR mobile management.In LTE In, the mobile management of wireless heterogeneous networks (Radio Resource Control, RRC) state is network controlled, i.e., Network determines the connection relationship between user equipment and cell.
Under normal circumstances, user equipment first disconnects the connection between source base station during network-control switching, then with Target BS is attached.However, establishing the company with target BS after the connection that user equipment disconnects between source base station Before connecing, without connection relationship between user equipment and source base station, user equipment and target BS, user can not be transmitted at this time The uplink/downlink user face data of equipment, leads in handoff procedure that there are the interruptions in the user face of long period.
Summary of the invention
The application can be reduced mainly solving the technical problems that provide a kind of communication handover method and communication switching device The break period of handoff procedure.
In order to solve the above-mentioned technical problem, the application first aspect provides a kind of communication handover method, this method comprises: source The measurement report of base station reception user equipment to report；Source base station judges whether measurement report meets pre-switch condition；If satisfied, then Source base station sends pre-switch instruction to user equipment, and pre-switch instruction is used to indicate user equipment to establish connection with target BS And the connection of holding and source base station；Source base station receives the random access success message from target BS, random access success Message is connect for indicating that user equipment is successfully established with target BS；Source base station monitoring user equipment side signal quality be It is no to meet practical switching condition；If signal quality meets practical switching condition, source base station executes practical switching to complete to switch.
In order to solve the above-mentioned technical problem, the application second aspect provides a kind of communication handover method, this method comprises: with Family equipment is to source base station reporting measurement reports；User equipment receives the pre-switch instruction from source base station, and pre-switch instruction is used Connection is established in instruction user equipment and target BS and keeps the connection with source base station；User device responsive pre-switch instruction exists It keeps establishing connection with target BS in the case where connecting with source base station；User equipment is according to from source base station or target BS Execute or do not execute practical switching about whether executing the notice that actually switches.
In order to solve the above-mentioned technical problem, the application third aspect provides a kind of communication handover method, this method comprises: mesh The pre-switch that base station reception is marked from source base station is requested, and includes the information of user equipment in pre-switch request, and target BS is Source base station is user equipment selection according to the measurement report of user equipment to report；Target BS sends pre-switch to source base station and rings Answer message；Target BS and user equipment establish connection；Target BS sends random access success message to source base station, connects at random Enter success message to connect for indicating that user equipment is successfully established with target BS；Target BS is according to from source base station Practical switching is executed or not executed about whether the notice actually switched is executed.
In order to solve the above-mentioned technical problem, the application fourth aspect provides a kind of communication switching device, which includes place Manage device and telecommunication circuit, processor connection communication circuit；Processor is for executing instruction to realize the above method.
In order to solve the above-mentioned technical problem, the 5th aspect of the application provides a kind of communication switching device, is stored with instruction, should Instruction, which is performed, realizes above-mentioned method.
The beneficial effect of the application is: being in contrast to the prior art, the application communication handover method is due to source base station Pre-switch instruction is sent to user equipment, user equipment can be kept for the case where connecting with source base station after responding pre-switch instruction Lower and target BS establishes connection, and the case where the signal quality of source base station monitoring user equipment side meets practical switching condition Under execute practical switching again to complete to switch, user equipment disconnects the connection with source base station again in actual handover process, uses at this time Family equipment has been completed to greatly promote with the probability for establishing connection of target BS, therefore when can reduce the interruption of handoff procedure Between.
Detailed description of the invention
Fig. 1 is the flow diagram of the application communication handover method first embodiment；
Fig. 2 is the flow diagram of the application communication handover method second embodiment；
Fig. 3 be the application communication handover method second embodiment source base station receive from target BS random access at The flow diagram actually switched after function message；
Fig. 4 is the flow diagram of the application communication handover method 3rd embodiment；
Fig. 5 is the flow diagram of the application communication handover method fourth embodiment；
Fig. 6 is the flow diagram of the 5th embodiment of the application communication handover method；
Fig. 7 is the flow diagram of the application communication handover method sixth embodiment；
Fig. 8 is the flow diagram of the 7th embodiment of the application communication handover method；
Fig. 9 is the structural schematic diagram of the application communication switching device first embodiment；
Figure 10 is the structural schematic diagram of the application communication switching device second embodiment；
Figure 11 is the structural schematic diagram of another embodiment of the application communication switching device second embodiment.
Specific embodiment
The application is described in detail with reference to the accompanying drawings and examples.What is do not conflicted in following embodiment can phase Mutually combine.
Referring to Fig. 1, Fig. 1 is the flow diagram of the application communication handover method first embodiment.
The executing subject of the application communication handover method first embodiment is base station, and base station conduct in handoff procedure The base station that source base station, i.e. user equipment (User Equipment, UE) currently connect.Base station connects core net and and user equipment It carries out wireless communication, provides communication overlay for corresponding geographic area.Base station can be macro base station, micro- base station (micro), pico- (pico) base station or Home eNodeB (femtocell).In some embodiments, base station can also be referred to as wireless base station, access Point, B node, evolved B node (eNodeB, eNB), gNB or other suitable terms.The communication handover method packet of the present embodiment Include following steps:
S101: the measurement report of source base station reception user equipment to report.
Source base station can send measuring configuration message to user equipment before this step, and the measuring configuration message is for referring to Show when user equipment starts measurement and reporting measurement reports.For example, the measuring configuration message can indicate user equipment with One predetermined period reporting measurement reports, or can indicate user equipment reporting measurement reports on a preset condition based, in default item Reporting measurement reports can report survey when the signal quality of the source base station measured is less than preset threshold for user equipment under part Amount report.
Optionally, measurement report may include the present bit of the signal quality of the measurement object of user equipment, user equipment Set, the load of the direction of motion and target BS one or more of is worked as, wherein measurement object may include source cell and/ Or Target cell.
Optionally, reporting for measurement report can be periodically, be also possible to acyclic.
Optionally, aperiodicity reporting measurement reports can be user equipment in the measuring configuration for receiving source base station transmission After message, to source base station reporting measurement reports.Acyclic reporting measurement reports can also be user equipment according to source base station Signal quality with adaptive periodic report measurement report, for example, user equipment can establish the signal quality of source base station and upper The list in report period can be reported when the signal quality of source base station is larger (good) with lower report cycle；In source base When the signal quality stood is smaller (poor), it can be reported with higher report cycle.
S102: source base station judges whether measurement report meets pre-switch condition.
Optionally, pre-switch condition may include that the source cell signal quality of user equipment side is less than first threshold, user The Target cell signal quality of equipment side is greater than second threshold, the poor signal quality of user equipment side is greater than in third threshold value extremely Few one kind, poor signal quality can be the difference of the signal quality of the Target cell and source cell of user equipment side, i.e. user equipment The signal quality of the Target cell of side subtracts the signal quality of source cell.
If measurement report meets pre-switch condition, step S103 is jumped to；If measurement report is unsatisfactory for pre-switch condition, Then the measurement report of user equipment can be waited to be judged again, that is, jump to S101.
S103: source base station to user equipment send pre-switch instruction, pre-switch instruction be used to indicate user equipment with mesh Mark base station establishes connection and keeps the connection with source base station.
Optionally, before S103, source base station can send pre-switch request to target BS, and receive in source base station When pre-switch response message from target BS is confirmation message, S103 is executed.
Due to the signal quality of the measurement object in measurement report including user equipment, source base station can be according to measurement report In signal quality, the selection target base station from measurement object.In another embodiment, during source base station can be reported with composite measurement The signal quality of measurement object, the current location of user equipment, the direction of motion, measurement object the factors selection target such as load Base station.
Optionally, source base station can choose signal quality greater than preset threshold measurement object as target BS, can also To arrange measurement object from big to small by signal quality, the top-quality base station of the number of winning the confidence is as target BS.Measurement object Can be with base station similar on source base station geographical location, letter can be directly acquired by inter-base station interface by being also possible to source base station The base station of breath.
The pre-switch instruction (RRC Connnection Reconfiguration) of the present embodiment is for controlling user equipment Connection is established with target BS and keeps the connection with source base station.Optionally, pre-switch instruction configuration parameter can be with existing skill Switching command in art is different, and specific pre-switch instruction configuration parameter can control user equipment and target through this embodiment Base station establishes connection and keeps the connection with source base station.In another embodiment, pre-switch instruction can with it is in the prior art Switching command is identical, but switch mode is specified in preparatory handover configurations, and under different switch modes, user equipment exists It is different to receive the operation done when pre-switch instruction, such as under improved switch mode, user equipment receives pre-switch and refers to Connection can be established after order with target BS and keeps the connection with source base station.
S104: source base station receives the random access success message from target BS, and random access success message is used for It indicates that user equipment is successfully established with target BS to connect.
Although user equipment has been established with target BS and connect, to reduce the interface between source base station and target BS Load, source base station can temporarily not to target BS forward user face data, between user equipment and target BS without The transmission of user face data packet.
S105: whether the signal quality of source base station monitoring user equipment side meets practical switching condition.
Optionally, the signal quality of the source base station of the user equipment side under practical switching condition can be less than pre-switch condition Under the signal quality of source base station of user equipment side, user equipment side under practical switching condition target BS signal matter Amount can be greater than the signal quality of the target BS of the user equipment side under the conditions of pre-switch, and the use under practical switching condition The poor signal quality of family equipment side can be greater than the poor signal quality of the user equipment side under the conditions of pre-switch.This means that pre-cut The process of changing can the starting when source cell signal quality of user equipment side is more preferable, reduce user equipment in completion and target Base station establish before connection just disconnected with source cell thus occur Radio Link Failure (Radio Link Failure, RLF).Especially in high frequency/dense deployment cell, easily there is the case where Radio Link Failure.
S106: if signal quality meets practical switching condition, source base station executes practical switching to complete to switch.
Before actually switching is completed, if source base station receives the user data for issuing user equipment from core net, that The user data is not sent to user equipment but is transmitted to target BS by source base station.
Optionally, when signal quality is unsatisfactory for practical switching condition, S107 can be executed, i.e. source base station does not execute reality Switching.
Implementation through the foregoing embodiment, since source base station sends pre-switch instruction to user equipment, user equipment is in sound It can keep establishing connection in the case where connecting with target BS with source base station after answering pre-switch to instruct, and monitor and use in source base station The signal quality of family equipment side executes practical switching again in the case where meeting practical switching condition to complete to switch, and actually switches User equipment disconnects the connection with source base station again in journey, and user equipment has been completed to establish the general of connection with target BS at this time Rate greatly promotes, therefore can reduce the break period of handoff procedure.
Referring to Fig. 2, Fig. 2 is the flow diagram of the application communication handover method second embodiment.The application communication is cut The second embodiment for changing method is the specific embodiment of communication handover method.The present embodiment is to the application communication handover method One embodiment further expands, and same part is not repeated herein, the communication handover method of the present embodiment include with Lower step:
S201: the measurement report of source base station reception user equipment to report.
S202: source base station judges whether measurement report meets pre-switch condition.
In the present embodiment, source base station can according to the signal quality of the measurement object of the user equipment in measurement report, The load of the current location of user equipment, the direction of motion and target BS one or more of works as whether to judge measurement report Meet default switching condition.
In other embodiments, such as when source base station is communicated using time-division multiplex technology with user equipment, source base Standing can judge whether measurement report meets pre-switch condition according to the signal quality that uplink channel status in measurement report obtains, Uplink channel status can be obtained according to signal quality, user equipment received signal quality and the user terminal noise that base station is sent It takes, specifically: the signal that uplink channel status=(user equipment received signal quality-user terminal noise)/base station is sent Quality, source base station can be less than or equal to a preset channel state according to uplink channel status and judge that measurement report satisfaction is default Switching condition.
S203: if the measurement report of source base station judgement meets pre-switch condition, source base station is set according to measurement report for user Alternative target BS.
In the present embodiment, source base station can choose measurement object of the signal quality greater than preset threshold as target base It stands, measurement object can also be arranged from big to small by signal quality, the top-quality base station of the number of winning the confidence is as target BS.It surveys Amount object can be with base station similar on source base station geographical location, being also possible to source base station can be direct by inter-base station interface Obtain the base station of information.
In other embodiments, source base station can also be user equipment selection target according to the channel status in measurement report Base station.Optionally, source base station can be selected with source base station according to signal quality according to the method for channel status selection target base station The method of target BS is similar.
Optionally, when source base station judges that measurement report is unsatisfactory for preset condition, S201 is jumped to, i.e., source base station is after continued access Receive the measurement report of user equipment to report.
S204: source base station sends pre-switch request to target BS.
It optionally, may include the information of user equipment in pre-switch request.
The information of user equipment may include all required information of the conventional switch operating of target BS completion, such as completely The context of user equipment, radio bearer information, Target cell ID, base station switch transitory key (eNB/gNB handover Transition Key, KeNB*/KgNB*), the cell-radio network including user equipment at source base station temporarily identify (Cell Radio Network Temmporary Identify, C-RNTI) RRC context, access layer (Access Stratum, AS) configuration, the physical layer ID of source cell, the Radio Link Failure (Radio Link Failure, RLF) for being likely to occur are extensive Multiple short full message authentication code (Message Authentication Code-Integrity, MAC-I) etc., wherein The context of complete user equipment includes at least UE X2/Xn signaling context reference (the UE X2/Xn at source base station Signaling context reference at source eNB), UE S1/NG signaling context reference (UE S1/NG Signaling context reference), wherein interface of the X2/Xn between base station, S1/NG be base station and core net it Between interface.Optionally, the information of user equipment can also include one or more combinations of above- mentioned information.
Optionally, after source base station sends pre-switch request to target BS, target BS can execute admission control, sentence It is disconnected whether to there are enough resources to receive the user equipment, disappear if so, then the confirmation that pre-switch prepares can be sent to source base station It ceases (Acknowledgement, ACK), the confirmation message that pre-switch prepares is for indicating admission control success.If it is not, Pre-switch being sent to source base station and preparing non-acknowledgement message (Non-Acknowledgement, NACK), pre-switch preparation is denied Message is for indicating that admission control fails.
S205: source base station receive from target BS pre-switch response message, source base station judge it is received whether be Confirmation message.
Optionally, pre-switch response message can be confirmation message, or unacknowledged information.
S206: source base station receive the pre-switch response message from target BS be confirmation message when, source base station to User equipment sends pre-switch instruction, and pre-switch instruction is used to indicate user equipment to establish connection and holding with target BS With the connection of source base station.
Optionally, after source base station receives non-acknowledgement message, S207 can be jumped to, it can reselect as user Another target BS of device service, until a target BS sends the confirmation message that pre-switch prepares to source base station.Optionally, Source base station is that user equipment selects the method for another target BS can be for, source base station using in measurement report signal quality or Person's channel status is that user equipment selects another target BS.Select the method for another target BS can be with selection target base station Method it is similar, details are not described herein again.
S208: source base station receives the random access success message from target BS, and random access success message is used for It indicates that user equipment is successfully established with target BS to connect.
S209: whether the signal quality of source base station monitoring user equipment side meets practical switching condition.
Optionally, it may include: source that whether the signal quality of source base station monitoring user equipment side, which meets practical switching condition, Base station can star switching timer；Whether source base station monitoring signals quality can meet the within the validity period of switching timer One condition can be determined that signal quality meets practical switching condition if meeting；When switching timer and expiring, source base station can be with Whether monitoring signals quality meets second condition, determines that signal quality meets practical switching condition if meeting.
It should be understood that if source base station monitoring signals quality within the validity period of switching timer meets first condition, it can be with Directly it is judged as that the signal quality of user equipment side meets practical switching condition, it may not be necessary to whether judge monitoring signals quality again Meet second condition.And if source base station switch timer validity period in monitoring signals quality be unsatisfactory for first condition when, And when source base station monitoring signals quality meets second condition, it is practical also to may determine that the signal quality for user equipment side meets Switching condition.
After in the present embodiment, the initial value of timer can be 0/ validity period, and 0 and validity period can respectively correspond positive meter When and countdown, validity period/be less than or equal to 0 to judge effectively whether can be greater than or equal to by judging the current value of timer Whether the phase terminates.For example, when the initial value of timer is 0 and validity period is A, when the current value of timer is more than or equal to A then may determine that be terminated for validity period.Equally, when the initial value of timer is virtual value, when the current value of timer is less than Or it may determine that equal to 0 and terminate for validity period.
Whether source base station monitoring signals quality within the validity period of switching timer meets that first condition can there are many real Mode is applied, for example, in one embodiment, source base station can be according to user equipment to report within the validity period of switching timer Measurement report obtain signal quality；Source base station may determine that whether signal quality meets first condition.In another embodiment party Under formula, source base station can be communicated using time-division multiplex technology with user equipment, and source base station can join according to the uplink received Examine the uplink channel status between signal estimation user equipment and source base station；Due to uplink and downlink frequency range phase in time division multiplex system Together, source base station can use downlink signal quality (the i.e. source cell signal quality) work that uplink channel status obtains user equipment side For signal quality；Source base station may determine that whether signal quality meets first condition.
It may include: that source base station can receive and set from user that whether source base station monitoring signals quality, which meets second condition, Standby updated measurement report；Source base station may determine that whether updated measurement report meets second condition.Optionally, source Base station receives the updated measurement report from user equipment, and user equipment can be sent out with predetermined period to source base station Measurement report is sent, so that source base station can receive the measurement report that user equipment is sent with predetermined period.Alternatively, source base station connects Receiving the updated measurement report from user equipment can also be, source base station can send measurement control to user equipment and disappear Breath, user equipment obtain measurement report after can receive measurement control message and are sent to source base station, and source base station can receive this Measurement report.
Optionally, first condition may include that source cell signal quality is big less than the 4th threshold value, Target cell signal quality It is greater than at least one of the 6th threshold value in the 5th threshold value, poor signal quality；
Optionally, second condition may include that source cell signal quality is big less than the 7th threshold value, Target cell signal quality It is greater than at least one of the 9th threshold value in the 8th threshold value, poor signal quality.
Optionally, first threshold can be greater than the 4th threshold value, and/or second threshold can be less than the 5th threshold value, and/or the Three threshold values can be less than the 6th threshold value.
Optionally, the 7th threshold value can be greater than the 4th threshold value, and/or the 8th threshold value can be less than the 5th threshold value, and/or the Nine threshold values can be less than the 6th threshold value.
S209: if signal quality meets practical switching condition, source base station executes practical switching to complete to switch.
Optionally, source base station execute practical switching with complete switching may include: source base station can with notifying user equipment with Source base station disconnects, and can transmit Sequence Number state transfer message to target BS, and can forward user to target BS The user face data packet of equipment.
Optionally, it can be that source base station can be to user that source base station, which can be disconnected with notifying user equipment with source base station, Equipment, which sends connection, terminates signaling, which terminates signaling and disconnect for notifying user equipment with source base station.
Optionally, source base station, which can be disconnected with notifying user equipment with source base station, to be, source base station can to Family equipment sends the last one user face data packet, the last one user face data packet may include switching mark, switching mark For indicating that start practical switching is disconnected with notifying user equipment and source base station.Specifically, since source base station is to user It is user face data to be divided into several data packets with preset byte, and one wraps ground to user that equipment, which sends user face data packet, Equipment is sent, and the last one user face data packet can be the last one data packet that user equipment is sent to by source base station. Further, in this embodiment switching mark can lie in the last one user face data packet of user face data.It is logical It crosses and lies in switching mark in the last one user face data packet of user face data, it is possible to reduce source base station and user equipment Between signaling overheads.For example, the head of the last one data packet includes a bit identification position, being used to indicate the data packet includes one A switching identifies, and includes that the HO indicator that length is 1bit is identified as switching in the data of data packet, value is 1 table Show the practical switching of execution, value cancels switching for 0 expression, naturally it is also possible to which in turn, i.e., value is that 0 expression execution is actually cut It changes, value is that switching is cancelled in 1 expression.
Optionally, if signal quality is unsatisfactory for practical switching condition, source base station does not execute practical switching.
Referring to Fig. 3, Fig. 3 is that the application communication handover method second embodiment source base station is received from target BS The flow diagram actually switched after random access success message.The method of switching includes:
S221: the random access success message from target BS is received.
The random access success message can be used to indicate that user equipment is successfully established with target BS and connect.
It is alternatively possible to as target BS and be used by the RACH Successful Indicator that length is 1bit The mark that family equipment is successfully accessed, value are that 1 expression is successfully accessed, and value is 0 expression access failure, naturally it is also possible to anti- Come over.
S222: source base station starting switching timer.
Optionally, the duration of timer can be according to the signal of the signal quality of source base station, target BS in measurement report At least one of quality, the motion state of user equipment (including movement speed and moving direction etc.) and application scenarios are true Fixed, wherein application scenarios may include the use state of user equipment, such as the industry of the remaining capacity of user equipment, user equipment The use states such as the noise of service type and user equipment ambient enviroment.
S223: source base station monitoring signals quality within the validity period of switching timer.
S224: whether the signal quality that source base station judgement monitors before the deadline meets first condition.
Optionally, when the signal quality of monitoring meets first condition, S228 can be jumped to, executes handoff procedure；? When the signal quality of monitoring is unsatisfactory for first condition, S225 can be jumped to.
S225: judge to switch whether timer expires.
When switching timer expires, step S226 can be jumped to；When switching timer is not yet due, can jump to Step S223, source base station continue monitoring signals quality.
S226: whether the signal quality of source base station monitoring mobile terminal side meets second condition.
Optionally, signal quality the step of whether meeting second condition of source base station monitoring mobile terminal side, may include: Source base station can send testing and control instruction to user equipment, so that user equipment is after receiving testing and control instruction, it can be with Updated measurement report is sent to source base station, source base station can judge the letter of user equipment side according to updated measurement report Whether number quality meets second condition.
In another embodiment, the step of whether signal quality of source base station monitoring mobile terminal side meets second condition It can also include: the measurement report that source base station can receive user equipment periodicity sending, source base station can be according to user equipment Judge whether the signal quality of user equipment side meets second condition to source base station periodicity sending measurement report.
When source base station monitors that signal quality meets second condition, S228 can be jumped to；Letter is monitored in source base station When number quality is unsatisfactory for second condition, then it is judged as that source base station signal quality is unsatisfactory for practical switching condition, can jumps to S227。
S227: source base station notifying user equipment and/or target BS cancel switching.
Optionally, after source base station notifying user equipment and/or target BS cancel switching, source base station can be continued to The measurement report of user equipment to report, with the judgement and execution switched next time.
S228: source base station notifying user equipment is disconnected with source base station, is transmitted Sequence Number state transfer to target BS Message, and to target BS forwarding user equipment user face data packet.
S229: source base station discharges resource shared by user equipment.
Optionally, source base station can receive sequence number (Sequence Number, SN) state transfer in target BS and disappear After the user face data packet of breath and user equipment, switching is completed, and user equipment is communicated with target BS.
SN state transfer message is for transmitting Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) sequence number, to notify the data transmission state of target BS source base station.
User data can be the user data to user equipment that source base station is received from core net.User equipment executes Practical switching is disconnected the connection with source base station, and user data can not be sent to user equipment by source base station, therefore be stopped just Progress user data transmission and forward user data to target BS.
Further, target BS can also send the notice of the context of release user equipment, source base station to source base station After receiving the notice of context of release user equipment, resource shared by user equipment can be discharged.
Referring to Fig. 4, Fig. 4 is the flow diagram of the application communication handover method 3rd embodiment.The application switching side The executing subject of method 3rd embodiment is user equipment.The communication handover method of the present embodiment includes:
S301: user equipment is to source base station reporting measurement reports.
Before this step, user equipment can receive source base station and send measuring configuration message, which uses When start measurement and reporting measurement reports in instruction user equipment.
Optionally, user equipment can be mobile phone, Vehicle mounted station, tablet computer or smartwatch etc..
Optionally, user equipment can periodically to source base station reporting measurement reports, or can aperiodically to Source base station reporting measurement reports, such as event triggering type, i.e. user equipment are in the measuring configuration message for receiving source base station transmission It afterwards, can be to source base station reporting measurement reports.
S302: user equipment receives the pre-switch instruction from source base station, and pre-switch instruction is used to indicate user equipment Connection is established with target BS and keeps the connection with source base station.
S303: user device responsive pre-switch instruction, which is established in the case where keeping connecting with source base station with target BS, to be connected It connects.
Although user equipment has been established with target BS and connect, to reduce the interface between source base station and target BS Load, source base station can temporarily not to target BS forward user face data, between user equipment and target BS without The transmission of user face data packet.
Optionally, user equipment can periodically can also be rung to source base station reporting measurement reports or user equipment It should be from the measurement control message of source base station, with to source base station reporting measurement reports, measurement report can be used for source base station It judges whether to switch.Source base station determines whether that the step of switching over can be refering to description above according to measurement report.
S304: user equipment is held according to the notice actually switched about whether execution from source base station or target BS Row does not execute practical switching.
Optionally, user equipment can execute reality according to the notice that the execution from source base station or target BS actually switches Border switching.For example, user after receiving the notice disconnected from source base station or target BS, disconnects and source base station Connection.
Optionally, the connection that user equipment can receive source base station transmission disconnects after terminating signaling and the connection of source base station, Wherein, the connection terminates signaling and is disconnected with source base station for notifying user equipment.
Optionally, user equipment can receive disconnection and source base station after the last one user face data packet that source base station is sent Connection, the last one user face data packet may include switching mark, and switching mark is for indicating the practical switching of starting with logical Know that user equipment is disconnected with source base station.
Although user equipment has been established with target BS and connect, to reduce the interface between source base station and target BS Load, source base station can temporarily not to target BS forward user face data, between user equipment and target BS without The transmission of user face data packet.
Optionally, user equipment may also receive from the cancellation switching notice in source base station or target BS, the cancellation Switching notice, which is used to indicate, does not execute practical switching；User device responsive cancels the connection of switching notice disconnection and target BS.
Referring to Fig. 5, Fig. 5 is the flow diagram of the application communication handover method fourth embodiment.The application switching side The executing subject of method fourth embodiment is target BS.The communication handover method of the present embodiment includes:
S401: target BS receives the pre-switch request from source base station.
It is user equipment selection, pre-switch that target BS, which can be source base station according to the measurement report of user equipment to report, It may include the information of user equipment in request.
Optionally, target BS can be source base station and be chosen according to measurement report.For example, source base station can will measure In report signal quality be greater than preset threshold measurement object as target BS, can also be by the measurement object in measurement report It is arranged from big to small by signal quality, the top-quality base station of the number of winning the confidence is as target BS.Wherein, measurement object can be with Similar base station on source base station geographical location, the base of information can be directly acquired by inter-base station interface by being also possible to source base station It stands.
S402: target BS sends pre-switch response message to source base station.
Target BS executes admission control, judges whether there is enough resources and receives the user equipment, if so, then Xiang Yuan Base station sends the confirmation message that pre-switch prepares, and the confirmation message that pre-switch prepares is for indicating admission control success.If not yet Have, then sends pre-switch to source base station and prepare non-acknowledgement message, pre-switch preparation denies message for indicating that admission control fails.
S403: target BS and user equipment establish connection.
While target BS and user equipment establish connection, source base station is also connect with user equipment.
S404: target BS sends random access success message to source base station, and random access success message is used for indicating Family equipment is successfully established with target BS to be connect.
S405: target BS is executed according to the notice actually switched about whether execution from source base station or is not executed Practical switching.
Optionally, target BS can actually be cut according to the notice execution actually switched about execution from source base station It changes.Specifically: target BS receives the serial-number-state transmission message from source base station, and comes to user equipment forwarding In the user face data packet of the user equipment of source base station；Target BS completes path switching；Target BS notifies source base station release The context of user equipment.
Optionally, target BS, about the notice actually switched is not executed, can not execute reality according to from source base station Border switching, specifically: target BS receives the cancellation switching notice from source base station；Target BS echo canceling switching is logical Know disconnection and the connection of user equipment.
Optionally, target BS can also to user equipment forward cancel switching notice so that user equipment cancel its with Connection between target BS.
It is reduction source it should be understood that being connect before actually switching is completed although user equipment has been established with target BS The load of interface between base station and target BS, source base station temporarily can not forward user face data to target BS.
Referring to Fig. 6, Fig. 6 is the flow diagram of the 5th embodiment of the application communication handover method.
The 5th embodiment of the application communication handover method is the application communication handover method when switching timer is not yet due Switching method, wherein part identical with previous embodiment repeats no more.
S501: source base station sends measuring configuration message to user equipment.
S502: the measurement report of source base station reception user equipment to report.
S503: source base station determines starting pre-switch according to measurement report and determines target BS for user equipment.
S504: source base station sends pre-switch request to target BS.
S505: target BS sends the confirmation message that pre-switch prepares to source base station.
Target BS prepares after executing admission control success in L1/L2 execution pre-switch, distributes resource for user equipment It is rear to source base station send pre-switch prepare confirmation message (Acknowledgement, ACK).Target BS is user equipment New C-RNTI, dedicated random access sequence that the information of the resource of distribution, for example, user equipment are distributed etc., can be used as mesh A part of mark base station information includes that independently transmitted source base station can also be given by source base station in the confirmation message that pre-switch prepares It is sent to user equipment.
S506: source base station sends pre-switch instruction to user equipment.
S507: user equipment starting random access and target BS establish connection.
It should be noted that in the present embodiment, user equipment and target BS establish connection and keep the connection with source base station.
S508: target BS sends the message that target BS and user equipment are successfully connected to source base station.
S509: source base station after its message being successfully connected with user equipment for receiving target BS transmission, cut by starting Change timer.
S510: source base station monitors that signal quality meets first condition within the validity period of switching timer.
S511: source base station transmits Sequence Number state transfer message to target BS.
Optionally, source base station does not forward user face data packet to target BS before executing practical switching, that is, source base station Before S451 user face data packet is not forwarded to target BS.In this way, source base station and user can not only be avoided The case where Radio Link Failure (Radio Link Failure, RLF) between equipment, additionally it is possible to reduce source base station and target base Signaling overheads between standing.
It should be understood that user equipment only carries out the transmission of user face data with source base station before S511.
S512: user face data packet of the source base station to target BS forwarding user equipment.
S513: source base station notifying user equipment is disconnected with source base station.
The present embodiment is not construed as limiting the sequencing of S511, S512 and S513, for example, source base station can also be notified first After user equipment and source base station disconnect, source base station transmits Sequence Number state transfer message to target BS, and to target base It stands and forwards the user face data packet of user equipment, alternatively, source base station notifying user equipment and source base station can also disconnect company simultaneously It connects, and transmits Sequence Number state transfer message to target BS, to the user face data packet of target BS forwarding user equipment.
User equipment switching is completed, and user equipment and target BS carry out user plane data transfer.
S514: target BS notifies the context of source base station release user equipment.
S515: after source base station receives the contextual information of release user equipment, resources for user equipment is discharged.
Referring to Fig. 7, Fig. 7 is the flow diagram of the application communication handover method sixth embodiment.
The application communication handover method sixth embodiment is the side for switching user equipment when timer expires and not executing switching Method, wherein part identical with previous embodiment repeats no more.The communication handover method step of the present embodiment includes:
S601: source base station sends measuring configuration message to user equipment.
S602: the measurement report of source base station reception user equipment to report.
S603: source base station determines starting pre-switch according to measurement report and determines target BS for user equipment.
S604: source base station sends pre-switch request to target BS.
S605: target BS sends the confirmation message that pre-switch prepares to source base station.
S606: source base station sends pre-switch instruction to user equipment.
S607: user equipment starting random access and target BS establish connection.
S608: target BS sends the message that target BS and user equipment are successfully connected to source base station.
S609: source base station after its message being successfully connected with user equipment for receiving target BS transmission, cut by starting Change timer.
S610: source base station monitoring signals quality within the validity period of switching timer is unsatisfactory for first condition.
S611: source base station sends measurement control message to user equipment.
Measuring control signaling can be same or different with the measurement configuration information in step S601.Control message is measured to use In control user equipment, so that user equipment sends updated measurement report to source base station.Optionally, measurement control message can To send a updated measurement report for controlling user equipment, it also can control user equipment and put hair in different times Multiple updated measurement reports are sent, are not construed as limiting herein.
S612: user equipment is after the measurement control message for receiving source base station transmission, after sending its update to source base station Measurement report.
Optionally, updated measurement report is user equipment after the measurement control message for receiving source base station transmission, Obtain the signal quality of the source base station of its position, the signal quality of target BS, user equipment motion state (including move Dynamic speed and moving direction etc.) and at least one of application scenarios form updated measurement report.
S613: source base station decides not to perform switching according to the updated measurement report received.
S614: source base station notifies target BS to cancel the information of switching.
In other embodiments, source base station can cancel the information of switching with notifying user equipment.Or source base station can be same When notifying user equipment and target BS cancel switching information.
In the present embodiment, it can be set by the Cancel Handover Indicator that length is 1bit as user Standby and target BS cancels the mark of switching, and value indicates to cancel switching for 1, and value is that switching is not cancelled in 0 expression, certainly It can also be in turn.
S615: after target BS receives the information for cancelling switching, the connection between user equipment is disconnected.And discharge use Family device resource.
In other embodiments, when source base station can cancel the information of switching with notifying user equipment, so that user equipment can With the connection between disconnection and target BS.
Referring to Fig. 8, Fig. 8 is the flow diagram of the 7th embodiment of the application communication handover method.
The 7th embodiment of the application communication handover method is the side for switching user equipment when timer expires and executing switching Method, wherein part identical with previous embodiment repeats no more.The communication handover method step of the present embodiment includes:
S701: source base station sends measuring configuration message to user equipment.
S702: the measurement report of source base station reception user equipment to report.
S703: source base station determines starting pre-switch according to measurement report and determines target BS for user equipment.
S704: source base station sends pre-switch request to target BS.
S705: target BS sends the confirmation message that pre-switch prepares to source base station.
S706: source base station sends pre-switch instruction to user equipment.
S707: user equipment starting random access and target BS establish connection.
S708: target BS sends the message that target BS and user equipment are successfully connected to source base station.
S709: source base station after its message being successfully connected with user equipment for receiving target BS transmission, cut by starting Change timer.
S710: source base station monitoring signals quality within the validity period of switching timer is unsatisfactory for first condition.
S711: source base station sends measurement control message to user equipment.
S712: user equipment is after the measurement control message for receiving source base station transmission, after sending its update to source base station Measurement report.
S713: source base station executes switching according to the updated measurement report decision received.
S714: source base station transmits Sequence Number state transfer message to target BS.
S715: user face data packet of the source base station to target BS forwarding user equipment.
S716: source base station notifying user equipment is disconnected with source base station.
It should be noted that not limiting the sequencing of S714, S715 and S716 in the present embodiment.
S717: target BS notifies the context of source base station release user equipment.
S718: after source base station receives the contextual information of release user equipment, resources for user equipment is discharged.
Referring to Fig. 9, Fig. 9 is the structural schematic diagram of the application communication switching device first embodiment.
In the present embodiment, communication switching device 10 includes processor 11 and telecommunication circuit 12,11 connection communication of processor Circuit 12.
Processor is used to execute instruction the communication handover method to realize above-mentioned any one embodiment.
Referring to Fig. 10, Figure 10 is the structural schematic diagram of the application communication switching device second embodiment.
In the present embodiment, communication switching device 20 is stored with instruction, which can be performed above-mentioned any to realize The communication handover method of one embodiment.
Figure 11 is please referred to, Figure 11 is the structural representation of another embodiment of the application communication switching device second embodiment Figure.Optionally, in another embodiment, communication switching device 30 may include storage device 31, and storage device 31 can be U Disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), the various media that can store program code such as magnetic disk, CD or server.Communication switching device 30 can be with Above-mentioned communication switching device 20 is identical.
Be in contrast to the prior art, the application communication handover method due to source base station to user equipment send pre-switch Instruction, user equipment, which is established in the case where that can keep connecting with source base station after responding pre-switch instruction with target BS, to be connected Connect, and source base station monitoring user equipment side signal quality meet practical switching condition in the case where execute again practical switching with Switching is completed, user equipment disconnects the connection with source base station again in actual handover process, and user equipment has been completed and mesh at this time The probability for establishing connection of mark base station greatly promotes, therefore can reduce the break period of handoff procedure.
The foregoing is merely presently filed embodiments, are not intended to limit the scope of the patents of the application, all to utilize this Equivalent structure or equivalent flow shift made by application specification and accompanying drawing content is applied directly or indirectly in other relevant Technical field similarly includes in the scope of patent protection of the application.

Claims (26)

1. a kind of communication handover method characterized by comprising
The measurement report of source base station reception user equipment to report；
The source base station judges whether the measurement report meets pre-switch condition；
If satisfied, then the source base station instructs to user equipment transmission pre-switch instruction, the pre-switch and is used to indicate institute User equipment is stated to establish connection with target BS and keep the connection with the source base station；
The source base station receives the random access success message from the target BS, and the random access success message is used It is connect in indicating that the user equipment is successfully established with the target BS；
Whether the signal quality that the source base station monitors the user equipment side meets practical switching condition；
If the signal quality meets the practical switching condition, the source base station executes practical switching to complete described cut It changes.
2. the method according to claim 1, wherein
The source base station further comprises before sending pre-switch instruction to the user equipment:
The source base station is user equipment selection target base station according to the measurement report；
The source base station sends pre-switch request to the target BS；
The source base station receives the pre-switch response message from the target BS.
3. the method according to claim 1, wherein
Whether the signal quality that the source base station monitors the user equipment side meets practical switching condition
The source base station starting switching timer；
The source base station monitors whether the signal quality meets first condition within the validity period of the switching timer, if full It is sufficient then determine that the signal quality meets practical switching condition；
When the switching timer expires, the source base station monitors whether the signal quality meets second condition, if meeting Then determine that the signal quality meets practical switching condition.
4. according to the method described in claim 3, it is characterized in that,
The source base station monitors the signal quality and whether meets first condition within the validity period of the switching timer
The source base station obtains institute according to the measurement report of the user equipment to report within the validity period of the switching timer State signal quality；
The source base station judges whether the signal quality meets the first condition.
5. according to the method described in claim 3, it is characterized in that,
The source base station is communicated using time-division multiplex technology with the user equipment, and the source base station is in the switching timing Whether the validity period of the device interior monitoring signal quality, which meets first condition, includes:
The source base station estimates the uplink channel status of the user equipment；
The source base station obtains the signal quality using the uplink channel status；
The source base station judges whether the signal quality meets the first condition.
6. according to the method described in claim 3, it is characterized in that,
Whether the source base station monitoring signal quality, which meets second condition, includes:
The source base station receives the updated measurement report from the user equipment；
The source base station judges whether the updated measurement report meets the second condition.
7. according to the method described in claim 6, it is characterized in that,
The source base station is received further comprises before the updated measurement report of the user equipment:
The source base station sends measurement control message to the user equipment.
8. according to the method described in claim 3, it is characterized in that,
The pre-switch condition includes that the source cell signal quality of the user equipment side is less than first threshold, the user equipment The Target cell signal quality of side is greater than second threshold, the poor signal quality of the user equipment side is greater than in third threshold value extremely Few one kind, the poor signal quality be the user equipment side the Target cell and the source cell signal quality it Difference；
The first condition, which includes the source cell signal quality, is greater than the less than the 4th threshold value, the Target cell signal quality Five threshold values, the poor signal quality are greater than at least one of the 6th threshold value；
The second condition, which includes the source cell signal quality, is greater than the less than the 7th threshold value, the Target cell signal quality Eight threshold values, the poor signal quality are greater than at least one of the 9th threshold value.
9. according to the method described in claim 8, it is characterized in that,
The first threshold is greater than the 4th threshold value, the second threshold is less than the 5th threshold value and/or the third threshold Value is less than the 6th threshold value.
10. according to the method described in claim 8, it is characterized in that,
7th threshold value is greater than the 4th threshold value, the 8th threshold value is less than the 5th threshold value and/or the 9th threshold Value is less than the 6th threshold value.
11. method according to claim 1 to 10, which is characterized in that
The source base station executes practical switching to complete the switching
The source base station notifies the user equipment to disconnect with the source base station, and Xiang Suoshu target BS transmits Sequence Number shape State transmits message, and the user face data packet of the user equipment is forwarded to the target BS.
12. according to the method for claim 11, which is characterized in that
The source base station notifies that the user equipment is disconnected with the source base station
The source base station, which sends connection to the user equipment, terminates signaling, and the connection terminates signaling for notifying the user Equipment is disconnected with the source base station；Or
The source base station sends the last one user face data packet, the last one described user face data packet to the user equipment It is identified including switching, the switching mark is for indicating the practical switching of starting to notify the user equipment and the source base station disconnected Open connection.
13. according to the method for claim 11, which is characterized in that
The source base station does not forward the user face data packet to the target BS before executing the practical switching.
14. method according to claim 1 to 10, which is characterized in that the source base station monitors the user and sets The signal quality of standby side further comprises after whether meeting practical switching condition:
If the signal quality is unsatisfactory for the practical switching condition, the source base station notifies the user equipment and/or institute It states target BS and cancels switching.
15. a kind of communication handover method characterized by comprising
User equipment is to source base station reporting measurement reports；
The user equipment receives the pre-switch instruction from the source base station, and the pre-switch instruction is used to indicate the use Family equipment and target BS establish connection and keep the connection with the source base station；
Pre-switch described in the user device responsive instruction with the source base station keep connect in the case where with the target base Connection is established at station；
The user equipment according to from the source base station or the target BS about whether execute actually switch it is logical Know execution or does not execute the practical switching.
16. according to the method for claim 15, which is characterized in that the user equipment according to from the source base station or The notice of the target BS actually switched about whether execution executes or does not execute the practical switching
The user equipment receives the notice that disconnects from the source base station, it is described disconnect notice and be used to indicate hold The row practical switching；
The connection of notice disconnection and the source base station is disconnected described in the user device responsive.
17. according to the method for claim 16, which is characterized in that
The user equipment receives the notice that disconnects from the source base station
The user equipment reception terminates signaling from the connection of the source base station；Or
The user equipment receives the last one user face data packet from the source base station, the last one described user face Data packet includes switching mark, and the switching mark is for indicating the practical switching of starting to notify the user equipment and the source Base station disconnects.
18. according to the method for claim 16, which is characterized in that
The user equipment receive from the source base station disconnect notice before from the source base station receive user face Data packet.
19. according to the method for claim 15, which is characterized in that the user equipment according to from the source base station or The notice of the target BS actually switched about whether execution executes or does not execute the practical switching
The user equipment receives the cancellation switching notice from the source base station or the target BS, the cancellation switching Notice, which is used to indicate, does not execute the practical switching；
Cancellation switching notice described in the user device responsive disconnects the connection with the target BS.
20. method described in any one of 5-19 according to claim 1, which is characterized in that pre- described in the user device responsive Switching command further comprises after establishing connection with the target BS in the case where keeping and connecting with the source base station:
The user equipment periodically or response from the source base station measurement control message on the source base station Measurement report is reported, the measurement report is used to judge whether to switch for the source base station.
21. a kind of communication handover method characterized by comprising
Target BS receives the pre-switch request from source base station, includes the information of user equipment in the pre-switch request, The target BS is that the source base station is selected according to the measurement report of the user equipment to report for the user equipment；
The target BS sends pre-switch response message to the source base station；
The target BS and the user equipment establish connection；
The target BS sends random access success message to the source base station, and the random access success message is for indicating The user equipment is successfully established with the target BS and connect；
The target BS is executed according to the notice actually switched about whether execution from the source base station or is not executed The practical switching.
22. according to the method for claim 21, which is characterized in that
The target BS is executed according to the notice actually switched about whether execution from the source base station or is not executed The reality, which switches, includes:
The target BS receives the serial-number-state transmission message from the source base station, and forwards to the user equipment From the user face data packet of the user equipment of the source base station；
The target BS completes path switching；
The target BS notifies the source base station to discharge the context of the user equipment.
23. according to the method for claim 21, which is characterized in that
The target BS is executed according to the notice actually switched about whether execution from the source base station or is not executed The reality, which switches, includes:
The target BS receives the cancellation switching notice from the source base station；
The target BS responds the connection of cancellation the switching notice disconnection and the user equipment.
24. according to the method for claim 23, which is characterized in that further comprise:
The target BS forwards the cancellation switching notice to the user equipment.
25. a kind of communication switching device, which is characterized in that including processor and telecommunication circuit, the processor connection is described logical Believe circuit；
The processor is for executing instruction to realize such as any one of claim 1-24 the method.
26. a kind of communication switching device is stored with instruction, which is characterized in that described instruction is performed realization such as claim Method described in any one of 1-24.
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