CN101355787B - Method for switching cell - Google Patents
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- CN101355787B CN101355787B CN2007101194343A CN200710119434A CN101355787B CN 101355787 B CN101355787 B CN 101355787B CN 2007101194343 A CN2007101194343 A CN 2007101194343A CN 200710119434 A CN200710119434 A CN 200710119434A CN 101355787 B CN101355787 B CN 101355787B
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Abstract
The invention discloses a method for switching cells, comprising the following steps: firstly, switching judgment conditions and preset preswitching judgment conditions which are preset for determining a single candidate target cell are acquired by a user terminal (UE); secondly, when the UE judges the existence of the candidate target cell according to the wireless signal quality of service cells and adjacent cells, and the preswitching judgment conditions, the UE requests a UMTS (Universal Mobile Telecommunication System) Terrestrial Radio Access Network (UTRAN) to switch the candidate target cell; thirdly, the UE and the UTRAN store the switching result; and fourthly, when the UE judges the existence of a target cell according to the wireless signal quality of the service cells and the adjacent cells, and the switching judgment conditions, the UE and the UTRAN communicate with each other by using the switching result if judgment is made that the target cell is consistent with the candidate target cell. Application of the method can reduce the time of the process of switching the cells, guarantee the switching timeliness and then improve the switching success rate.
Description
Technical field
The present invention relates to mobile communication technology, particularly a kind of cell switching method.
Background technology
In wireless communication system, when the radio signal quality of user terminal (UE) Serving cell is relatively poor, usually UE need be switched to the better adjacent cell of radio signal quality (abbreviation adjacent area), think that the user provides more good service, this process is called the sub-district and switches.In TD SDMA inserts (TD-SCDMA) system, have only a wireless links to be connected usually between UE and the universal mobile telecommunications system wireless access network (UTRAN), therefore, the rapidity and the promptness of the switching of assurance sub-district just seem extremely important.
Relevant regulations according to third generation partner program (3GPP) agreement, the Serving cell that reported according to UE by UTRAN is switched usually in sub-district in the TD-SCDMA system and the radio signal quality and the switch decision condition of adjacent area carried out switch decision, and the radio signal quality in Serving cell and adjacent area is initiated when satisfying the switch decision condition.Fig. 1 shows the schematic flow sheet that switch the sub-district in the existing TD-SCDMA system.Referring to Fig. 1, this flow process comprises:
The 1st step: UTRAN measures by measuring control (Measurement Control) notice UE, comprising: notify the relevant measuring object of UE, measure rule etc.
The 2nd step: UE measures measuring object according to measuring rule, and to UTRAN reporting measurement reports (Measurement Report).Include the parameter that characterizes Serving cell and adjacent area radio signal quality in the measurement report that UE reports, UTRAN can carry out switch decision in view of the above.
The 3rd step: UTRAN carries out switch decision, if the result of switch decision for switching, then continues to carry out for the 4th step, otherwise, return and carried out for the 2nd step.
In this step, the switch decision that UTRAN carried out is: the measurement report that reports according to UE and the information such as state of current network judge whether to exist the adjacent area of satisfying the switch decision condition, if exist, then the result of switch decision continued to carry out the 4th step for switching.
The 4th step: UTRAN carries out hand-off process.
The adjacent area of satisfying the switch decision condition is commonly referred to Target cell, and in this step, UTRAN will set up new Radio Link (RL) at Target cell, and the line parameter reprovision of going forward side by side is handled (promptly reconfiguring relevant parameter).
The 5th step: UTRAN is by the reprovision parameter information notice UE of reallocation message with new Radio Link.
The 6th step: UE carries out the reprovision processing after receiving reallocation message, and after the reprovision processing completes successfully, sends reprovision by new Radio Link to UTRAN and finish message.
By above-mentioned sub-district switching flow as seen, the main time overhead in the existing cell switch process is: the switch decision and the hand-off process of carrying out in the UTRAN side.Wherein, hand-off process mainly comprises: set up new Radio Link at Target cell, reconfigure relevant parameter etc.Because switch decision and hand-off process need expend the long period, make the promptness that switch existing sub-district not to be guaranteed, and then can not guarantee handover success rate.
Summary of the invention
In view of this, the invention provides a kind of cell switching method, to reduce the time that cell switch process was spent, the promptness that assurance is switched.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of cell switching method comprises:
The pre-switch judgment condition that is used for a unique definite candidate target cells that user terminal UE obtains the switch decision condition and sets in advance;
When the radio signal quality of UE according to Serving cell and adjacent area, when judging that by described pre-switch judgment condition candidate target cells exists, request universal mobile telecommunications system wireless access network UTRAN carries out hand-off process at described candidate target cells;
UE and UTRAN preserve the result of described hand-off process;
When the radio signal quality of UE according to Serving cell and adjacent area, when being existed by described switch decision condition criterion Target cell, if judge that described Target cell is consistent with described candidate target cells, then UE and UTRAN use the result of described hand-off process to communicate.
Wherein, the result of described hand-off process comprises: the Radio Link that UTRAN sets up at candidate target cells and carry out the reprovision parameter that the parameter renegotiation configuration process obtains;
Described UE and UTRAN use the result of described hand-off process communicate for: Radio Link and reprovision parameter that UE and UTRAN use described hand-off process to set up communicate.
Preferably, described UE judges that candidate target cells exists for: UE judges that the candidate target cells that satisfies described pre-switch judgment condition occurs for the first time;
Described request UTRAN carries out hand-off process at described candidate target cells: send pre-switch to UTRAN and set up request, UTRAN sets up Radio Link at described candidate target cells, carries out the parameter renegotiation configuration process.
Preferably, described UE judges that candidate target cells exists for: UE judges that current candidate target cells has not satisfied described pre-switch judgment condition;
Described request UTRAN carries out hand-off process at described candidate target cells: send the pre-switch removal request to UTRAN, Radio Link and corresponding reconfiguration parameters that the UTRAN deletion is set up at described current candidate target cells.
Preferably, described UE judges that candidate target cells exists for: UE judges that current candidate target cells has not satisfied described pre-switch judgment condition and had the new candidate target cells that satisfies described pre-switch judgment condition;
Described request UTRAN carries out hand-off process at described candidate target cells: send pre-switch to UTRAN and revise request, Radio Link and corresponding reconfiguration parameters that the UTRAN deletion is set up at described current candidate target cells, set up Radio Link at the described new candidate target cells that satisfies described pre-switch judgment condition, carry out the parameter renegotiation configuration process.
Further, after request UTRAN carries out hand-off process at described candidate target cells, can comprise: UE receives the result of the hand-off process of UTRAN transmission, and returns switching pre-processing to UTRAN and confirm.
Wherein, carry the information and the reprovision parameter information of the success of expression hand-off process among the result of described hand-off process;
The result that described UE and UTRAN preserve described hand-off process is: UE and UTRAN preserve described reprovision parameter information.
Further, after judging described Target cell and described candidate target cells is consistent, can comprise:
UE sends the handoff request message of carrying the activationary time parameter to UTRAN; When described activationary time parameter moment corresponding arrives, carry out described UE and UTRAN and use the result of described hand-off process to communicate.
Further, when the radio signal quality of UE, when existing, can comprise by described switch decision condition criterion Target cell according to Serving cell and adjacent area:
If judge that described Target cell and described candidate target cells are inconsistent, then UTRAN carries out hand-off process at described Target cell, and the result of the described hand-off process of carrying out at Target cell of UE and UTRAN use communicates.
As seen from the above technical solution, cell switch determining method of the present invention is by increasing by one by the radio signal quality of UE according to Serving cell and adjacent area in existing cell switch process, judge whether have the candidate target cells that satisfies the pre-switch judgment condition that sets in advance process (in the present invention, be called switching pre-processing), and will have the centralized switch decision of carrying out by UTRAN now and change to the distributing switch decision of carrying out by UE, can bring following beneficial effect:
At first, make UTRAN finish before can advanceing to the time point that need carry out switching the sub-district in the process that Target cell is set up Radio Link and carried out the parameter renegotiation configuration process, thereby effectively reduced the time that cell switch process spent, guarantee the promptness of switching, thereby improved handover success rate.
Secondly, the distributing switch decision by UE carries out because measurement and switch decision all carry out in the UE side, makes switch decision more accurate.
In addition, because the reprovision parameter has just sent to UE in the switching pre-processing process, and the switching pre-processing process is before the cell switch process of reality, that is to say, UE can receive the reallocation message that UTRAN sends when the current service cell signal quality is better, increase UE and correctly received the probability of this reallocation message, and then improved handover success rate.
Description of drawings
Fig. 1 shows the schematic flow sheet that switch the sub-district in the existing TD-SCDMA system.
Fig. 2 is the exemplary process diagram of cell switching method of the present invention.
Fig. 3 is the schematic diagram of the present invention's one better cell switching flow.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
Main thought of the present invention is to increase by one by the radio signal quality of UE according to Serving cell and adjacent area in existing cell switch process, judge whether have the candidate target cells that satisfies the pre-switch judgment condition that sets in advance process (in the present invention, be called switching pre-processing), this switching pre-processing makes UTRAN set up Radio Link at Target cell and can fulfil ahead of schedule with the process of carrying out the parameter renegotiation configuration process, thereby effectively reduced the time that cell switch process spent, guarantee the promptness of switching, thereby improved handover success rate.
Fig. 2 is the exemplary process diagram of cell switching method of the present invention.Referring to Fig. 2, this method comprises:
Step 201: the pre-switch judgment condition that is used for a unique definite candidate target cells that user terminal UE obtains the switch decision condition and sets in advance.
In this step, what set in advance determines that in order to unique the pre-switch judgment condition of a candidate target cells can be some judgment condition that characterize the district wireless signals quality.Radio signal quality when the adjacent area is better than to a certain degree, when the radio signal quality of Serving cell is inferior to a certain degree, described pre-switch judgment condition satisfies, the adjacent area that described radio signal quality is better than to a certain degree is a candidate target cells of the present invention.
The switch decision condition is the same with existing switch decision condition, is meant the judgment condition of UE in order to the Target cell determining to carry out the sub-district and switch.Described pre-switch judgment condition can be notified UE by UTRAN in measuring control, also can obtain by other modes by UE, for example, by the mode that in UE, sets in advance, or the mode that provides to UE by other network entities.
Step 202: when the radio signal quality of UE according to Serving cell and adjacent area, when judging that by described pre-switch judgment condition candidate target cells exists, request UTRAN carries out hand-off process at described candidate target cells.
In this step, UE judges whether the candidate target cells that satisfies the pre-switch judgment condition has multiple situation, accordingly, the mode that UE request UTRAN carries out hand-off process at described candidate target cells also can have multiple, is that example describes with three kinds of typical situations below:
First kind of situation:
When UE judges that the candidate target cells that satisfies the pre-switch judgment condition occurs for the first time, can send pre-switch to UTRAN and set up request, and set up the relevant information of carrying candidate target cells in the request, for example: the sign of candidate target cells in pre-switch.UTRAN can set up Radio Link at candidate target cells, carry out parameter renegotiation configuration process etc. after receiving that request is set up in pre-switch.
Second kind of situation:
When UE judges that current candidate target cells has not satisfied the pre-switch judgment condition, can send the pre-switch removal request to UTRAN, and in the pre-switch removal request, carry the relevant information of candidate target cells, for example: the sign of candidate target cells.After UTRAN receives the pre-switch removal request, with Radio Link and the corresponding reconfiguration parameters of deletion in current candidate target cells foundation.
The third situation:
Do not satisfied the pre-switch judgment condition and existed new when satisfying the candidate target cells of pre-switch judgment condition when UE judges current candidate target cells, can send pre-switch to UTRAN and revise request, and the relevant information of in pre-switch modification request, carrying candidate target cells, for example: the sign of candidate target cells.After UTRAN receives that request is revised in pre-switch, Radio Link and the corresponding reconfiguration parameters will deletion set up at current candidate target cells, and set up Radio Link at new candidate target cells, carry out processing such as parameter renegotiation configuration.
Step 203:UE and UTRAN preserve the result of described hand-off process.
In this step, send after corresponding switching pre-processing request and UTRAN carry out corresponding hand-off process according to described switching pre-processing request to UTRAN at UE, UTRAN can be further sends to UE with the result of hand-off process, and UE can return switching pre-processing to UTRAN and confirm after receiving the result of hand-off process.Here, the result of hand-off process can comprise: the Radio Link that UTRAN sets up at candidate target cells and carry out the reprovision parameter that the parameter renegotiation configuration process obtains can also comprise resource allocation result etc.
UTRAN can send the result of hand-off process by the switching pre-processing results messages to UE.Because hand-off process exists successfully and two kinds of possibilities of failure, corresponding, the information that UTRAN carries in the result of the hand-off process that UE sends is also with different:
When the hand-off process success, UTRAN can carry the information and the reprovision parameter information of expression hand-off process success in the result of hand-off process; After UE receives the result of above-mentioned hand-off process, can preserve the reprovision parameter information, and return switching pre-processing to UTRAN and confirm that at this moment, UTRAN can preserve described reprovision parameter information.
When hand-off process was failed, UTRAN can carry the information of expression hand-off process failure in the result of hand-off process; After UE receives the result of above-mentioned hand-off process, need not other operations, and UTRAN can delete the result of this hand-off process at once after sending the hand-off process result who carries expression hand-off process failure information.For example, can delete corresponding reprovision parameter information etc.
Step 204: when the radio signal quality of UE according to Serving cell and adjacent area, when existing by described switch decision condition criterion Target cell, if judge that described Target cell is consistent with described candidate target cells, then UE and UTRAN use the result of described hand-off process to communicate.
In this step, when UE judges that Target cell is consistent with candidate target cells, can send the handoff request message of carrying the activationary time parameter to UTRAN, and when activationary time parameter moment corresponding arrived, Radio Link that UE and UTRAN use hand-off process are set up and reprovision parameter etc. communicated.And UE can send reprovision to UTRAN by new Radio Link and finish (HandoverComplete) message.
In this step, when judge there is the Target cell that satisfies the switch decision condition in UE but this Target cell and candidate target cells when inconsistent, that is to say that this Target cell was not when step 202 was carried out hand-off process, then need to send the handoff request message of carrying this target cell information, carry out the sub-district with UTRAN according to existing sub-district switching flow then and switch to UTRAN.That is: carry out hand-off process by UTRAN at this Target cell, UE and UTRAN use the result of described hand-off process of carrying out at Target cell to communicate.
If UTRAN judges that can not carry out the sub-district switches after receiving handoff request message, can send to UE and switch refusal (Handover Reject) message.
Below by a concrete sub-district switching flow example cell switching method of the present invention is further elaborated.
Fig. 3 is the schematic diagram of the present invention's one better cell switching flow.Referring to Fig. 3, this sub-district switching flow comprises:
Pre-switch judgment condition that is used for a unique definite candidate target cells and switch decision condition notice UE that step 301:UTRAN will set in advance by measuring control.
In this step, UTRAN can also and measure rule and notify UE together relevant measuring object.
Step 302:UE carries out the pre-switch judgement.
In this step, UE will begin to measure accordingly according to the measurement control of receiving, simultaneously, UE will carry out the pre-switch judgement according to the radio signal quality and the pre-switch judgment condition of Serving cell that measures and adjacent area.
Step 303:UE sends corresponding pre-switch according to the pre-switch court verdict to UTRAN and handles request (PreHandover Process Request).
In this step, when the radio signal quality of UE according to Serving cell and adjacent area, determine the condition criterion candidate target cells when existing by pre-switch, to send corresponding pre-switch to UTRAN and handle request, request UTRAN carries out corresponding hand-off process at described candidate target cells, switching pre-processing just of the present invention.Here, request is handled in pre-switch can comprise three kinds of operational order types, promptly sets up, deletes and revise, and corresponds respectively to three kinds of situations judging that as previously mentioned candidate target cells exists.
As previously mentioned, when UE finds to occur for the first time satisfying the candidate target cells of pre-switch judgment condition, can send preliminary treatment to UTRAN and switch the request of foundation;
When UE judges that current candidate target cells (that is: the candidate target cells of a preceding switching pre-processing success) when not satisfying the pre-switch judgment condition, can send the preliminary treatment removal request to UTRAN;
Do not satisfied the pre-switch judgment condition and existed newly when satisfying the candidate target cells of pre-switch judgment condition when UE judges current candidate target cells, can send preliminary treatment to UTRAN and revise request.
The pre-switch that step 304:UTRAN sends according to UE is handled request and is carried out corresponding hand-off process.
In this step,, will set up Radio Link at candidate target cells, carry out the parameter renegotiation configuration process, carry out resource allocation etc. if UTRAN receives pre-switch foundation request;
If UTRAN receives the pre-switch removal request, with Radio Link and the corresponding reconfiguration parameters of deletion in current candidate target cells foundation;
If UTRAN receives that pre-switch revises request, Radio Link and the corresponding reconfiguration parameters will deletion set up at current candidate target cells, and set up Radio Link at new candidate target cells, carry out processing such as parameter renegotiation configuration.
After step 305:UTRAN finishes hand-off process, send the result of hand-off process to UE by switching pre-processing result (PreHandoverProcess Result) message.
In this step, when the hand-off process success, UTRAN can carry the information and the reprovision parameter information of expression hand-off process success in the result of hand-off process; When hand-off process was failed, UTRAN carries the failure of expression hand-off process in the result of hand-off process information got final product.
After step 306:UE receives the result of hand-off process, return switching pre-processing to UTRAN and confirm (PreHandover Process Confirm).
Step 307:UE and UTRAN preserve the result of hand-off process.
If UE carries the information and the reprovision parameter information of the success of expression hand-off process in the result of the hand-off process that step 306 is received, then in this step, UE will preserve described reprovision parameter information, UTRAN also will preserve corresponding reprovision parameter information after receiving the switching pre-processing affirmation that UE returns.If the hand-off process failure, then UTRAN will directly delete the result of this hand-off process, promptly delete corresponding reprovision parameter information etc.
Step 308:UE carries out switch decision.
In this step, UE will carry out switch decision according to the radio signal quality and the switch decision condition of Serving cell that measures and adjacent area.
Step 309: when UE judges that the Target cell of switch decision condition is satisfied in existence, send handoff request (Handover Require) message to UTRAN.
In this step, if Target cell is consistent with current candidate target cells, promptly set up new Radio Link at Target cell, and carried out relevant parameters and reshuffled, then UE can carry parameters such as activationary time in handoff request message; If Target cell and current candidate target cells are inconsistent, the information that UE only needs to carry Target cell in handoff request message gets final product, and for example, carries the sign of Target cell.
Step 310:UTRAN carries out the sub-district with UE and switches relevant processing.
In this step, if UE carries the activationary time parameter in the handoff request message that UTRAN sends, then when the activationary time moment corresponding arrived, UE and UTRAN used and begin to communicate by new Radio Link; Otherwise, switch according to the flow processing sub-district that switch existing sub-district, that is: carry out hand-off process by UTRAN at described Target cell, UE and UTRAN use the result of described hand-off process of carrying out at Target cell to communicate.
In this step,, can send to UE and switch refusal (Handover Reject) message if UTRAN judges that can not carry out the sub-district switches after receiving handoff request message.
Step 311: after the handover success of sub-district, UE sends to switch to UTRAN and finishes (HandoverComplete) message.
In this step, UE will send handoff completion message to UTRAN by new Radio Link.
So far, finish better cell switching flow of the present invention.
As seen from the above-described embodiment, cell switch determining method of the present invention is by increasing by one by the radio signal quality of UE according to Serving cell and adjacent area in existing cell switch process, judge the switching pre-processing process that whether has the candidate target cells that satisfies the pre-switch judgment condition that sets in advance, and will have the centralized switch decision of carrying out by UTRAN now and change to the distributing switch decision of carrying out by UE, can bring following beneficial effect:
At first, make UTRAN finish before can advanceing to the time point that need carry out switching the sub-district in the process that Target cell is set up Radio Link and carried out the parameter renegotiation configuration process, can reduce need carry out that the sub-district switches the time be carved into switch moment of finishing during this period of time in, the processing time of UTRAN, thereby effectively reduced the time that cell switch process spent, guarantee the promptness of switching, thereby improved handover success rate.
Secondly, the distributing switch decision by UE carries out because measurement and switch decision all carry out in the UE side, makes switch decision more accurate.
In addition, because the reprovision parameter has just sent to UE in the switching pre-processing process, and the switching pre-processing process is before the cell switch process of reality, that is to say, UE can receive the reallocation message that UTRAN sends when the current service cell signal quality is better, increase UE and correctly received the probability of this reallocation message, and then improved handover success rate.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a cell switching method is characterized in that, comprising:
The pre-switch judgment condition that is used for a unique definite candidate target cells that user terminal UE obtains the switch decision condition and sets in advance;
When the radio signal quality of UE according to Serving cell and adjacent area, when judging that by described pre-switch judgment condition candidate target cells exists, request universal mobile telecommunications system wireless access network UTRAN carries out hand-off process at described candidate target cells;
UE and UTRAN preserve the result of described hand-off process;
When the radio signal quality of UE according to Serving cell and adjacent area, when being existed by described switch decision condition criterion Target cell, if judge that described Target cell is consistent with described candidate target cells, then UE and UTRAN use the result of described hand-off process to communicate.
2. method according to claim 1 is characterized in that, the result of described hand-off process comprises: the Radio Link that UTRAN sets up at candidate target cells and carry out the reprovision parameter that the parameter renegotiation configuration process obtains;
Described UE and UTRAN use the result of described hand-off process communicate for: Radio Link and reprovision parameter that UE and UTRAN use described hand-off process to set up communicate.
3. method according to claim 2 is characterized in that, described UE judges that candidate target cells exists for: UE judges that the candidate target cells that satisfies described pre-switch judgment condition occurs for the first time;
Described request UTRAN carries out hand-off process at described candidate target cells: send pre-switch to UTRAN and set up request, UTRAN sets up Radio Link at described candidate target cells, carries out the parameter renegotiation configuration process.
4. method according to claim 2 is characterized in that, described UE judges that candidate target cells exists for: UE judges that current candidate target cells has not satisfied described pre-switch judgment condition;
Described request UTRAN carries out hand-off process at described candidate target cells: send the pre-switch removal request to UTRAN, Radio Link and corresponding reconfiguration parameters that the UTRAN deletion is set up at described current candidate target cells.
5. method according to claim 2, it is characterized in that described UE judges that candidate target cells exists for: UE judges that current candidate target cells has not satisfied described pre-switch judgment condition and had the new candidate target cells that satisfies described pre-switch judgment condition;
Described request UTRAN carries out hand-off process at described candidate target cells: send pre-switch to UTRAN and revise request, Radio Link and corresponding reconfiguration parameters that the UTRAN deletion is set up at described current candidate target cells, set up Radio Link at the described new candidate target cells that satisfies described pre-switch judgment condition, carry out the parameter renegotiation configuration process.
6. according to each described method of claim 1 to 5, it is characterized in that, after request UTRAN carries out hand-off process at described candidate target cells, further comprise: UE receives the result of the hand-off process of UTRAN transmission, and returns switching pre-processing to UTRAN and confirm.
7. method according to claim 6 is characterized in that, carries the information and the reprovision parameter information of expression hand-off process success among the result of described hand-off process;
The result that described UE and UTRAN preserve described hand-off process is: UE and UTRAN preserve described reprovision parameter information.
8. according to each described method of claim 1 to 5, it is characterized in that, after judging described Target cell and described candidate target cells is consistent, further comprise:
UE sends the handoff request message of carrying the activationary time parameter to UTRAN; When described activationary time parameter moment corresponding arrives, carry out described UE and UTRAN and use the result of described hand-off process to communicate.
9. according to each described method of claim 1 to 5, it is characterized in that,, when existing, further comprise by described switch decision condition criterion Target cell when the radio signal quality of UE according to Serving cell and adjacent area:
If judge that described Target cell and described candidate target cells are inconsistent, then UTRAN carries out hand-off process at described Target cell, and the result of the described hand-off process of carrying out at Target cell of UE and UTRAN use communicates.
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| CN2007101194343A CN101355787B (en) | 2007-07-24 | 2007-07-24 | Method for switching cell |
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| CN2007101194343A CN101355787B (en) | 2007-07-24 | 2007-07-24 | Method for switching cell |
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| CN101355787B true CN101355787B (en) | 2011-06-01 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873566B (en) * | 2009-04-24 | 2014-04-09 | 中兴通讯股份有限公司 | Mobility management method and system of user terminal along given line |
| CN101873652B (en) * | 2010-03-09 | 2012-10-10 | 北京大学 | Handover switching method of user terminal under single-hop mode in satellite communication system |
| CN102264113B (en) * | 2010-05-25 | 2014-12-17 | 鼎桥通信技术有限公司 | Virtual soft switching method in time division-synchronous code division multiple access (TD-SCDMA) system |
| CN102076012B (en) * | 2011-01-18 | 2016-08-03 | 中兴通讯股份有限公司 | Neighboring BS information processing method, switching instruction method, terminal and base station |
| EP3139662A4 (en) * | 2014-05-30 | 2017-05-31 | Huawei Technologies Co. Ltd. | Handover method, bearer setup method, base station, and terminal |
| CN104661268B (en) * | 2015-03-16 | 2018-06-01 | 联想(北京)有限公司 | Information processing method, information processing unit and mobile terminal |
| CN108337700B (en) * | 2017-01-20 | 2020-11-17 | 北京佰才邦技术有限公司 | Method for automatically switching terminal, base station and terminal |
| CN108632912A (en) * | 2017-03-16 | 2018-10-09 | 中兴通讯股份有限公司 | The method and apparatus of switching cell |
| CN108738043B (en) * | 2017-04-25 | 2023-05-23 | 中兴通讯股份有限公司 | User equipment switching method, device and system |
| CN108235394B (en) * | 2018-01-03 | 2020-12-04 | 武汉虹信科技发展有限责任公司 | Method and device for switching serving cells |
| CN110035451B (en) * | 2018-01-11 | 2020-08-28 | 惠州Tcl移动通信有限公司 | Communication switching method and communication switching device |
| JP2019193166A (en) * | 2018-04-26 | 2019-10-31 | シャープ株式会社 | Terminal device, base station device, wireless communication system, wireless communication method, and program |
| CN112740760B (en) * | 2019-02-13 | 2023-05-09 | Oppo广东移动通信有限公司 | Method and equipment for cell switching |
| WO2023206146A1 (en) * | 2022-04-27 | 2023-11-02 | 京东方科技集团股份有限公司 | Communication control method, terminal device, base station and readable storage medium |
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