CN101321381A - Switching method, system and mobile station - Google Patents
Switching method, system and mobile station Download PDFInfo
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- CN101321381A CN101321381A CNA2007101117309A CN200710111730A CN101321381A CN 101321381 A CN101321381 A CN 101321381A CN A2007101117309 A CNA2007101117309 A CN A2007101117309A CN 200710111730 A CN200710111730 A CN 200710111730A CN 101321381 A CN101321381 A CN 101321381A
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- transceiver
- travelling carriage
- service link
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- base station
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- 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
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- Computer Networks & Wireless Communication (AREA)
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Abstract
This invention discloses a switching method and a mobile station. The method includes the following steps: installing a first business link between a source base station and a first transceiver of the mobile station, including the following steps: receiving a switching application of the source base station; sending an assigning request to a target base station based on the switching application, requesting to install a second business link between the target base station and a second transceiver of the mobile station; after the information finished by the business link, sending a switching order and indicating the mobile station switch to the second business link. The switching can be directly processed without waiting the connection of air interface business link through installing the air interface business link between the target base station and the mobile station before sending the switching order, which greatly reduces the switching interrupting time and effectively avoids the problem of losing communication in the switching process caused by unstable air interface signal, and ensures the communication continuity and effectively improves the communication quality.
Description
Technical field
The present invention relates to the wireless access field, relate in particular to the method and system and the MS of switching.
Background technology
In the radio honeycomb mobile network, MS can roam arbitrarily, in the user's communication process, owing to moving of MS causes exceeding source base station (BS) coverage of original access, and the target BS coverage that enters other, need make MS be connected communication with target BS this moment by switching, keeps the uninterrupted of user's communication.
At present, the method of the direct-cut operation that the radio honeycomb mobile network provides is: when MS moves, detect source BS signal variation to a certain thresholding or after detecting stronger better signal of new BS, will report source BS, source BS carries out direct-cut operation according to certain algorithmic decision needs, generates handover request message and sends to mobile switching centre (MSC), and MSC then instruct MS switches, interrupt communicating by letter, and trial is set up professional the connection with target BS with source BS.
Direct-cut operation belongs to the switching mode of " have no progeny earlier and connect ", and the hard handover approach highly versatile is applicable to various radio honeycomb mobile network systems, or even the switching between the different networks system.But, on the one hand, exist to connect significantly and interrupt, thereby cause service quality decline because to set up the radio open connect hours between MS and the new BS longer; On the other hand because the unsteadiness of radio open signal, can successfully to set up the reliability of radio open service link not high with new BS after the switching, if can't successfully set up service link with new BS then directly causes call drop, cause the direct-cut operation cutting off rate higher.
Summary of the invention
The embodiment of the invention provides the method and system and the MS that switch, and highly versatile has guaranteed communication continuity, effectively promotes communication quality.
First aspect provides the method for switching, has set up first service link between first transceiver of source base station and travelling carriage, comprises the steps:
The handover request of reception sources base station;
According to described handover request, send the assignment request to target BS, set up second service link between second transceiver of described target BS and travelling carriage;
After the message that the reception service link is finished, send switching command, indicate described travelling carriage to switch to described second service link.
Second aspect provides the method for switching, has set up first service link between first transceiver of source base station and travelling carriage, comprises the steps:
The handover request of reception sources base station;
According to described handover request, judge whether target BS uses first transceiver;
If target BS uses first transceiver, send handoff request message to described target BS, second service link between described target BS and the travelling carriage is set up in request;
If target BS does not use first transceiver, send the assignment request to target BS, second service link between second transceiver of described target BS and travelling carriage is set up in request, and described second service link comprises the service link of eating dishes without rice or wine; After the message that the reception service link is finished, send switching command, indicate described travelling carriage to switch on described second service link.
The third aspect provides travelling carriage, comprising:
Control unit is used to transmit control signal and switching signal;
Two or more transceivers are respectively applied for according to described control signal, the service link between foundation and the base station;
Switched connection element is used for according to described switching signal, and control is professional to be snapped on the service link of appointed transceiving device.
Fourth aspect provides the system of switching, has set up first service link between first transceiver of source base station and travelling carriage, comprising:
Source base station is used to generate handover request;
Mobile switching centre is used for sending the assignment request according to described handover request, sends switching command; And receive switch finish after the service link of source of release base station and MS;
Target BS is used for according to described assignment request, second service link between second transceiver of foundation and described travelling carriage, and the feedback service link is finished message;
Travelling carriage is used for according to described switching command, switches on described second service link.
The method and system of the switching that the embodiment of the invention provides, before switching command sends, set up the service link of eating dishes without rice or wine between second transceiver of target BS and MS earlier, thereby talking link can be directly switch on second transceiver, need not to wait for the connection of service link of eating dishes without rice or wine, significantly reduce HO-break duration, and effectively avoided because the jitter of eating dishes without rice or wine causes the problem of call drop in the handoff procedure, guarantee communication continuity, effectively promoted communication quality.
The MS that adopts the third aspect to provide, there is multi-transceiver in MS, each transceiver is simultaneously all in running order, separate each other, can respectively and set up service link between the base station, when needs switch, directly talking link is snapped on the transceiver of appointment and finish the direct-cut operation of travelling carriage, need not to wait for the connection of service link of eating dishes without rice or wine, significantly reduce HO-break duration, and effectively avoided having guaranteed communication continuity because the jitter of eating dishes without rice or wine causes the problem of call drop in the handoff procedure, effectively promote communication quality.
Description of drawings
Fig. 1 is the flow chart of the method switched in one embodiment of the invention;
Fig. 2 is the flow chart of the method switched in another embodiment of the present invention;
Fig. 3 is the structural representation of the system switched in one embodiment of the invention.
Embodiment
The embodiment of the invention has been set up the radio open service link in advance in direct-cut operation, not only can significantly reduce direct-cut operation break period, and effectively avoided because the qualitative problem that causes call drop in the direct-cut operation of radio open swinging of signal, guarantee communication continuity, effectively promoted communication quality.The improved method for hard switching highly versatile of the embodiment of the invention is applicable to various radio honeycomb mobile network systems, or even the switching between the different networks system.
Embodiment one, set up first service link between source BS and the MS, and the method for switching referring to Fig. 1, comprises the steps:
1, the handover request of MSC reception sources BS;
2, MSC sends the assignment request according to this handover request to target BS, and request target BS and MS set up second service link, comprise the service link of eating dishes without rice or wine in second service link;
3, after target BS and MS set up service link and finish, notice MSC, MSC sends switching command, carries out switching;
4, MS receives switching command, switches on second service link.
The step that more than sends switching command comprises: send switching command respectively to source BS and target BS.Send switching command to a plurality of BS, can increase the possibility that MS receives message.
The first above service link is based upon between first transceiver of source BS and MS.
The signal measurement result that source BS reports according to MS sends handover request.
MS can carry out frequency signal search and measurement with first transceiver, and the signal measurement result is reported source BS.
MS can also use other transceivers except that first transceiver, and for example second transceiver carries out the frequency signal search and measures, and by first transceiver signal measurement result is reported source BS.First transceiver is used for conversation, the implementation that other transceiver carries out the frequency signal search and measures, avoided a transceiver to keep current talking in a certain frequency, machine switches to the conflict that another frequency is carried out signal measurement in due course again, thereby improves the user's communication quality.
The second above service link specifically is based upon between second transceiver of target BS and MS.
First transceiver wherein can be identical with the pattern of second transceiver, and first transceiver is identical with the pattern of second transceiver, such as being GSM all, then can switch in gsm system; Perhaps all be CDMA, then can in cdma system, switch; Perhaps all be WCDMA, then can in the WCDMA system, switch.
The pattern of first transceiver and second transceiver also can be different, then can realize switching in various systems, further improve the versatility that travelling carriage switches.For example first transceiver is a second generation CDMA transceiver, and second transceiver is a third generation CDMA transceiver, then can realize the direct-cut operation between second generation CDMA and third generation cdma system; If first transceiver is the CDMA transceiver, second transceiver is the GSM transceiver, then can realize the direct-cut operation between CDMA and gsm system; If first transceiver is the CDMA transceiver, second transceiver is the WCDMA transceiver, then can realize the direct-cut operation between CDMA and WCDMA system.
After MS switches on second service link, report to MSC and to switch the message finish; MSC receives and switches after the message of finishing, removes first service link between source BS and the MS.
Each transceiver is simultaneously in running order among the above MS, separate each other, and be in talking state between first transceiver and the source BS, other transceiver carries out signal search and measurement in real time, when MS finds to exist measure signal intensity that transceiver reports stronger when better with respect to source BS, the cell list information that will be better than the signal of source BS reports source BS by first transceiver, the cell list information that source BS reports MS is carried in the handover request message and reports MSC, MSC therefrom selects a cell carrier frequencies as switching target, MSC issues the assignment request in the target BS of the cell carrier frequencies correspondence of selecting, thereby set up second service link of target BS, comprising the service link of eating dishes without rice or wine to another transceiver (for example second transceiver) of MS.After second service link was successfully set up, MSC issued switching command to MS, and MS switches to talking link on second service link.
Adopt the method in the present embodiment, can avoid the call drop of travelling carriage in direct-cut operation, and direct-cut operation between the support alien frequencies and the direct-cut operation between the different-waveband, go for various radio honeycomb mobile network systems and different mode and different Radio Network Systems.
Embodiment two, describe with the MS that equips a CDMA transceiver and the 2nd CDMA transceiver.Be equipped with other standard transceiver devices and situation about being equipped with, can go to understand and realize based on the thinking of present embodiment more than two transceivers.
Referring to Fig. 2, be the method that present embodiment switches:
201. according to the report of MS, BS suggestion in source proceeds to the direct-cut operation of Target cell, source BS sends the handover request message of band cell list to MSC.Compare the newly-increased transceiver sign cell altogether of supporting of the report of the MS in the step 201, the also newly-increased transceiver sign cell altogether of supporting of handover request message with prior art step 101.During specific implementation, increase a transceiver sign altogether in each element of cell list: 1 expression switching target small area and current talking link be same travelling carriage transceiver altogether; 0 expression switching target small area and the not shared travelling carriage transceiver of current talking link.
202.MSC receive handover request message, judge whether to exist in the message and support transceiver sign cell altogether, transceiver is then to target BS transmission handoff request message altogether if do not have common transceiver sign cell or be total to the indication of transceiver sign cell, and 102-114 finishes direct-cut operation according to step; If transceiver is not then to target BS transmission assignment request message altogether for the indication of transceiver sign cell altogether, second transceiver of indicating target BS and MS connects.
203. after receiving the assignment request message of MSC, target BS issues channel assignment message to MS, utilizes the channel assignment flow process of eating dishes without rice or wine of standard to finish between second transceiver of target BS and MS and sets up service link.
204.MS return TCH preamble response by second transceiver.
205. target BS sends the BS confirmation instruction of belt 2 authorization request to MS on forward traffic channel.
206.MS after receiving that BS confirms instruction, send MS by second transceiver and confirm instruction and on reverse traffic channel, transmit the empty TCH data of empty traffic channel data.
207. target BS sends professional connection message to MS, with the business configuration that appointment is used to call out, MS begins to manage business at second transceiver according to the business configuration of appointment.
208. after receiving professional connection message, MS finishes message by the connection of the second transceiver response service.
Service link is set up and to be finished 209. eat dishes without rice or wine between second transceiver of target BS and MS, if the target BS terrestrial links are all set up and fully after the intercommunication, target BS sends assignment to MSC and finishes message.
210.～210 ' MSC prepares the switching from source BS to target BS, and sends switching command to source BS and target BS simultaneously.Clearly, send switching command message from a plurality of BS simultaneously and will increase the possibility that MS receives message.Here 210 and 210 ' two steps walk abreast.Follow-up message similarly can send on two service link simultaneously, improves the reliability of message.
211.～211 ' source BS and target BS send expansion or general handover command messages to MS on the interface aloft.
212.～212 ' MS sends MS confirmation instruction to source BS or target BS.
213. the control unit of～213 ' MS switches to second transceiver with talking link from first transceiver, sends handoff completion message simultaneously to source BS and target BS after finishing.
214.～214 ' source BS or target BS send BS to MS and confirm instruction.
215.～215 ' receives that the source BS or the target BS of handoff completion message send handoff completion message to MSC, MS has completed successfully direct-cut operation to the MSC notice.
216.MSC send clear command message to source BS.
217. source BS will and first transceiver of MS between first service link discharge, discharge own land circuit and resource simultaneously after, send to remove to MSC and finish message, notice MSC removes processing and finishes.
For the method among the embodiment one, the system of corresponding switching is set on hardware, referring to Fig. 3, set up first service link between first transceiver of source BS and MS, comprising:
Source BS is used to generate handover request;
MSC is used for sending the assignment request according to handover request, sends switching command; And receive switch finish after the service link of source of release BS and MS;
Target BS is used for according to the assignment request, second service link between second transceiver of foundation and MSC, and the feedback service link is finished message;
MS is used for according to switching command, switches on second service link.
Wherein, MS comprises:
Control unit is used to transmit control signal and switching signal;
Two or more transceivers are respectively applied for according to control signal, the service link between foundation and the BS;
Switched connection element is used for according to switching signal, and control is professional to be snapped on the service link of appointed transceiving device.
In the present embodiment, MS comprises first transceiver and second transceiver.Second transceiver of MS comprises search and measuring unit, is used to carry out frequency signal search and measurement.
Can directly use control unit as input/output unit, user interface also can be set in addition the input and output device is provided, the user can be provided with the mode of operation and the search rate parameter of each transceiver by user interface, selects the transceiver of current talking.
Control bus signaling message transmission and control command; The data/address bus service data transmission, as voice packet, packet.
It will be appreciated by those skilled in the art that, each above-mentioned unit can provide by software, hardware or both methods of combination, although each above-mentioned parts provide as discrete unit in the drawings, but in fact, they can be by the microprocessor that comprises input and output port and operating software code, perhaps,, perhaps implement by above-mentioned combination perhaps by discreet component by the chip of customization or mixing.For example multi-transceiver can be contained in the processor and finishes, and each transceiver is integrated in the processor as a kind of form of software module.
The control unit of MS is according to terminal setting or BS indication, and the control multi-transceiver carries out the frequency signal search respectively and measures, and each frequency signal intensity is reported to BS.When a transceiver was used to converse, other transceiver can be proceeded the frequency signal search and measure.
MS can be provided with independently antenna by each transceiver, also can multi-transceiver totally one antenna, finish Signal Separation and synthetic by branch multiplexer/mixer is set between transceiver and the antenna.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program is when carrying out, comprise the steps: that having set up first service link between first transceiver of source BS and MSC converses, and comprises the steps: the handover request of reception sources BS; According to described handover request, send the assignment request to target BS, second service link between second transceiver of described target BS and MSC is set up in request, and described second service link comprises the service link of eating dishes without rice or wine; After the message that the reception service link is finished, send switching command, indicate described MSC to switch on described second service link, described storage medium, as: ROM/RAM, magnetic disc, CD etc.
More than method and system and MS that realization provided by the present invention MS is switched, be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1, the method for Qie Huaning has been set up first service link between first transceiver of source base station and travelling carriage, it is characterized in that, comprises the steps:
The handover request of reception sources base station;
According to described handover request, send the assignment request to target BS, set up second service link between second transceiver of described target BS and travelling carriage;
After the message that the reception service link is finished, send switching command, indicate described travelling carriage to switch to described second service link.
2, method according to claim 1 is characterized in that, the step of second service link between described second transceiver of setting up described target BS and travelling carriage comprises:
After receiving the assignment request, described target BS issues channel assignment message to described travelling carriage;
Described travelling carriage returns TCH preamble response by second transceiver;
Described target BS sends the base station to described travelling carriage and confirms instruction on forward traffic channel;
Described travelling carriage sends travelling carriage by second transceiver and confirms instruction and transmit the empty TCH data of empty traffic channel data on reverse traffic channel;
Described target BS sends professional connection message to described travelling carriage, the business configuration that is used to call out with appointment;
Described travelling carriage connects by the second transceiver response service finishes message.
3, method according to claim 1 is characterized in that, the step of described transmission switching command comprises:
Send switching command to source base station and target BS;
Described source base station sends to described travelling carriage by first service link with described switching command;
Described target BS sends to described travelling carriage by second service link with described switching command.
4, method according to claim 1 is characterized in that, also comprises the steps:
Travelling carriage carries out the frequency signal search and measures;
The signal measurement result that source base station reports according to travelling carriage sends handover request.
5, method according to claim 4 is characterized in that, the step that described travelling carriage carries out frequency signal search and measurement comprises:
Described travelling carriage carries out the frequency signal search with other transceivers except that first transceiver and measures.
6, the method for Qie Huaning has been set up first service link between first transceiver of source base station and travelling carriage, it is characterized in that, comprises the steps:
The handover request of reception sources base station;
According to described handover request, judge whether target BS uses first transceiver;
If target BS uses first transceiver, send handoff request message to described target BS, second service link between described target BS and the travelling carriage is set up in request;
If target BS does not use first transceiver, send the assignment request to target BS, second service link between second transceiver of described target BS and travelling carriage is set up in request, and described second service link comprises the service link of eating dishes without rice or wine; After the message that the reception service link is finished, send switching command, indicate described travelling carriage to switch on described second service link.
7, method according to claim 6 is characterized in that, and is described according to described handover request, judges whether target BS and described source base station use the step of the identical transceiver of travelling carriage to comprise:
Carry common transceiver sign in the described handover request,, obtain the judged result whether described target BS and described source base station use the identical transceiver of travelling carriage according to described altogether transceiver sign.
8, travelling carriage is characterized in that, comprising:
Control unit is used to transmit control signal and switching signal;
Two or more transceivers are respectively applied for according to described control signal, the service link between foundation and the base station;
Switched connection element is used for according to described switching signal, and control is professional to be snapped on the service link of appointed transceiving device.
9, the system of Qie Huaning has set up first service link between first transceiver of source base station and travelling carriage, it is characterized in that, comprising:
Source base station is used to generate handover request;
Mobile switching centre is used for sending the assignment request according to described handover request, sends switching command; And receive switch finish after the service link of source of release base station and MS;
Target BS is used for according to described assignment request, second service link between second transceiver of foundation and described travelling carriage, and the feedback service link is finished message;
Travelling carriage is used for according to described switching command, switches on described second service link.
10, system according to claim 9 is characterized in that, second transceiver of described travelling carriage comprises search and measuring unit, is used to carry out frequency signal search and measurement.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101117309A CN101321381B (en) | 2007-06-04 | 2007-06-04 | Hard handover method, system and mobile station |
| PCT/CN2008/070602 WO2008148314A1 (en) | 2007-06-04 | 2008-03-27 | Handover method, system and mobile station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101117309A CN101321381B (en) | 2007-06-04 | 2007-06-04 | Hard handover method, system and mobile station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101321381A true CN101321381A (en) | 2008-12-10 |
| CN101321381B CN101321381B (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101117309A Expired - Fee Related CN101321381B (en) | 2007-06-04 | 2007-06-04 | Hard handover method, system and mobile station |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101321381B (en) |
| WO (1) | WO2008148314A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010142233A1 (en) * | 2009-06-12 | 2010-12-16 | 华为技术有限公司 | Method, device and system for establishing switch link |
| CN110035451A (en) * | 2018-01-11 | 2019-07-19 | 惠州Tcl移动通信有限公司 | Communication handover method and communication switching device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5854785A (en) * | 1996-12-19 | 1998-12-29 | Motorola, Inc. | System method and wireless communication device for soft handoff |
| CN1154377C (en) * | 2001-06-13 | 2004-06-16 | 华为技术有限公司 | Seamless talking switching system and method for global radio mobile communication system |
| CN1157969C (en) * | 2002-12-13 | 2004-07-14 | 大唐移动通信设备有限公司 | Switching method used in mobile comunication system |
| CN100353806C (en) * | 2004-04-01 | 2007-12-05 | 大唐移动通信设备有限公司 | Relay switch-over method in TD-SCDMA mobile communication system |
| EP1757135A1 (en) * | 2004-06-15 | 2007-02-28 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Smooth hard handover method, mobile station and base station adapted for the method |
-
2007
- 2007-06-04 CN CN2007101117309A patent/CN101321381B/en not_active Expired - Fee Related
-
2008
- 2008-03-27 WO PCT/CN2008/070602 patent/WO2008148314A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010142233A1 (en) * | 2009-06-12 | 2010-12-16 | 华为技术有限公司 | Method, device and system for establishing switch link |
| CN110035451A (en) * | 2018-01-11 | 2019-07-19 | 惠州Tcl移动通信有限公司 | Communication handover method and communication switching device |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101321381B (en) | 2012-11-07 |
| WO2008148314A1 (en) | 2008-12-11 |
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