CN102202359B - Control method and apparatus thereof for handover of 2G network, and base station controller - Google Patents
Control method and apparatus thereof for handover of 2G network, and base station controller Download PDFInfo
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- CN102202359B CN102202359B CN201010130870.2A CN201010130870A CN102202359B CN 102202359 B CN102202359 B CN 102202359B CN 201010130870 A CN201010130870 A CN 201010130870A CN 102202359 B CN102202359 B CN 102202359B
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Abstract
The invention provides a control method and an apparatus thereof for a handover of a 2G network, and a base station controller. The control method comprises the following steps that: the base station controller buffers handover access information transmitted by UE, when the handover access information, which is prior to handover request information transmitted by a switching controller, is first received by the base station controller; if the handover request information is received by the base station controller when the buffering time is less than a first preset time threshold, subsequent handover flows will be carried out. According to the invention, whether the handover will success or not is no longer restricted to synchronizing capacity of the UE, so that a success rate of voice service handover in a scene of switching controlling device.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of control method, device and base station controller of the 2G of being switched to network.
Background technology
2G/3G core net has realized combination network at present, and Wireless Communication Equipment is still absolute construction.For the not high problem of the success rate of current intersystem handover, can find that by analysis success rate height is mainly limited to the length of switching time, if can shorten intersystem handover time, likely improves handover success rate.But the time of terminal air interface synchronization process is conventionally in 600-700ms left and right, and different terminals time difference; The time of core net preparatory stage need to be distinguished same exchange control device or across exchange control device, as, (the mobile switching center of same mobile switching centre, be called for short MSC) generally in about 100-200ms, and during across MSC generally in (below taking same MSC or under across MSC scene as example is explained) between 400～2000ms.Therefore, shorten and switch time even if network control unit (comprising the network control unit in 3G, LTE, 2G and other networks) issues switching command and re-positioning request (being Relocation required) to terminal (being UE) and core net MSC respectively simultaneously, also there is great risk in it under across MSC scene.That is to say, if air interface synchronization is ready to complete prior to core net, base station controller (is BSC, Base Station Controller) can abandon switching access (being handover access) information that terminal sends, after handover request (the being handover request) information sending until core net MSC arrives, just access information is switched in identification, but terminal can not repeat to send switching access information, therefore must cause this to switch call drop.Finding through test, is not singly to have this risk under across MSC scene, under MSC, sometimes there will be this problem yet, and reason is that terminal synchronizes is very fast.
Existing voice service switching controls technology has following deficiency:
(1), because terminal synchronizes is very fast, under same exchange control device scene, may cause switching call drop.
(2) due to terminal synchronizes is very fast and across core net time under exchange control device scene long, must cause switching call drop.
Summary of the invention
The first object of the present invention is to propose the high control method that is switched to 2G network of a kind of handover success rate.
The second object of the present invention is to propose the high control device that is switched to 2G network of a kind of handover success rate.
The 3rd object of the present invention is to propose the high base station controller of a kind of handover success rate.
For realizing above-mentioned the first object, the invention provides a kind of control method of the 2G of being switched to network, comprising: when base station controller is received the switching access information of terminal transmission in the handover request information sending prior to exchange control device, buffer memory switches access information; Base station controller is received handover request information in the time that cache-time is less than the first Preset Time threshold value, carries out follow-up switching flow.
For realizing above-mentioned the second object, the invention provides a kind of control device of the 2G of being switched to network, comprise: control module, for controlling base station controller in the time that the handover request information sending prior to core net exchange control device is received the switching access information of terminal transmission, buffer memory switches access information, until carry out follow-up switching flow receive handover request information in the first Preset Time threshold value time; Time block, for arranging the first Preset Time threshold value.
For realizing above-mentioned the 3rd object, the invention provides a kind of base station controller, comprising: time block, for the first Preset Time threshold value is set; Receive control module, while receiving the switching access information of terminal transmission for the handover request information sending at the exchange control device prior to core net, buffer memory switches access information, until carry out follow-up switching flow receive handover request information in the first Preset Time threshold value time.
In each embodiment of the present invention, formerly receive and switch when access information that buffer memory switches access information until carry out follow-up switching flow receive handover request information in the first Preset Time threshold value time by base station controller, make the success or not of switching no longer be confined to the synchronizing capacity of terminal, improved the success rate of switching with under MSC scene.
Brief description of the drawings
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification,, is not construed as limiting the invention in the lump for explaining the present invention with embodiments of the invention.In the accompanying drawings:
Fig. 1 is embodiment mono-flow chart of the control method that is switched to 2G network of the present invention;
Fig. 2 is embodiment bis-flow charts of the control method that is switched to 2G network of the present invention;
Fig. 3 is the example structure figure of the control device that is switched to 2G network of the present invention;
Fig. 4 is the example structure figure of base station controller of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
Embodiment of the method
Fig. 1 is embodiment mono-flow chart of the control method that is switched to 2G network of the present invention.As shown in Figure 1, the present embodiment comprises:
Step S102: when base station controller is received the switching access information of terminal transmission in the handover request information sending prior to exchange control device, buffer memory switches access information; Specific operation process is explained referring to Fig. 2's;
Step S104: base station controller is received handover request information in the time that cache-time is less than the first Preset Time threshold value, carries out follow-up switching flow; Specific operation process is explained referring to Fig. 2's.
The present embodiment is formerly received and is switched when access information that buffer memory switches access information until carry out follow-up switching flow receive handover request information in the first Preset Time threshold value time by base station controller, make the success or not of switching no longer be confined to the synchronizing capacity of terminal, improved the success rate of switching with under exchange control device scene.
Fig. 2 is embodiment bis-flow charts of the control method that is switched to 2G network of the present invention.As shown in Figure 2, the present embodiment comprises:
Step S202: in the time receiving the handover request of terminal, network control unit is communicated by letter with base station controller, and in the time of the response of As-received station control, send handover request and the exchange control device to core net to terminal simultaneously, as the MSC in 3G and 2G network and (the Mobility Management Entity of the Mobility Management Entity in LTE, be MME), send re-positioning request; (in following the present embodiment, all explaining as an example of the MSC in exchange control device example) wherein, this network control unit comprises the network control unit in 3G, LTE, 2G and other networks, as, radio network controller in 3G (is RNC, Radio Network Controller), BSC in 2G and the eNodeB in LTE, that is to say that each embodiment of the present invention is applicable to any network and switches to 2G network;
As, radio network controller is directly communicated by letter with base station controller by Iur-g interface, wherein, Iur-g interface is the standard interface between base station controller and radio network controller, it realizes 2G/3G intersystem handover between base station controller and network control unit, radio network controller can directly be sent to base station controller by handover request by Iur-g interface, and base station controller directly distributes corresponding Radio Resource for it, is assigned rear base station controller and responds; Now radio network controller directly issues handover request to UE, follows existing protocol flow process simultaneously, sends re-positioning request to core net MSC, prepares the resources such as core net A interface, Abis interface;
Step S204: terminal is being received after switching command to base station controller transmission switching access information; And MSC receiving after re-positioning request, send handover request information to base station controller;
Step S206: base station controller formerly receives that while switching access information, buffer memory switches access information, until carry out follow-up switching flow receive handover request information in the first Preset Time threshold value time, and abandon switching access information do not receive handover request information in the first Preset Time threshold value time, finish switching flow;
When concrete operations, " receive handover request information in the first Preset Time threshold value time, carrying out follow-up switching flow " in step S206 can comprise: in the time that cache-time reaches the first Preset Time threshold value, judge whether to receive handover request information, and carry out follow-up switching flow in the time receiving handover request information;
Step S208: base station controller is being received after switching access information and handover request information, first send Handover Request Acknowledge (being handover request acknowledge) information to core net MSC, then after the second Preset Time threshold value, send change detection (being handover detect) information;
Above-mentioned steps S208 considers across under MSC scene, target MSC-B can ask for user profile to VLR-B, in the time that A-HO-DETECT arrives prior to handover report (the being MAP-Send-Handover-Report) request of GSM network terminal transmission, MSC-B does not also send MAP pre-switch (Mobile Application Part (MAP)-prepare-handover, MAP-Prep-Handover) response to MSC-A; The network control unit that is equal to source is not also received reorientation order (being Relocation Command) message; Therefore understand according to existing switching flow, target side CN thinks that UE can not complete switching, therefore needs to perform step the operation of S208.In addition, for the first timing the setting according to actual needs of threshold value, as, suppose re-positioning request 1400ms time lag of time proportion positioning command, and the time delay average out to 600ms that eats dishes without rice or wine, first regularly threshold value can be set to 1400-600=800ms; If the time shorten of re-positioning request > reorientation order, the first timing threshold value correspondence reduces; The second timing threshold value is according to core net processing delay, as being set to 30～50ms.
The present embodiment is formerly received and is switched when access information that buffer memory switches access information until carry out follow-up switching flow receive handover request information in the first Preset Time threshold value time by base station controller, and do not receive handover request information in the first Preset Time threshold value time, abandon switching access information, and finish switching flow, make the success or not of switching no longer be confined to the synchronizing capacity of terminal, improved the success rate of switching with speech business under exchange control device scene; In addition, send Handover Request Acknowledge information and change detection information by priority, be not limited to the ability of core net, producer, terminal, improved the success rate of switching across under exchange control device scene.
Device embodiment
Fig. 3 is the example structure figure of the control device that is switched to 2G network of the present invention.As shown in Figure 3, the present embodiment comprises: control module 34, for controlling base station controller 32 in the time that the handover request information sending prior to core net exchange control device is received the switching access information of terminal transmission, buffer memory switches access information, until carry out follow-up switching flow receive handover request information in the first Preset Time threshold value time; Time block 36, for arranging the first Preset Time threshold value.
When concrete operations, this device can also comprise base station controller 32, for receiving the handover request information of exchange control device transmission and the switching access information of terminal transmission of core net, and carries out switching flow; Control module 34 can comprise: receive control module 322, be used for controlling base station controller 32 when receive switching access information prior to handover request information, buffer memory switches access information, until carry out follow-up switching flow receive handover request information in the first Preset Time threshold value time; Send control module 324, being used for controlling base station controller 32 is receiving after switching access information and handover request information, first send Handover Request Acknowledge information to exchange control device, after the second Preset Time threshold value, send change detection information again, wherein the second Preset Time threshold value is arranged by time block 36.
It will be understood by those skilled in the art that time block 36 and control module 34 can be combined arranges or separates setting, while specifically setting, can also be according to actual needs by time block 36 and control module 34 the two one of be arranged in base station controller 32.
This enforcement is formerly received and is switched when access information that buffer memory switches access information until carry out follow-up switching flow while receiving handover request information in the first Preset Time threshold value arranging at time block 34 by base station controller 32, make the success or not of switching no longer be confined to the synchronizing capacity of terminal, improved the success rate of switching with speech business under exchange control device scene; In addition, successively send Handover Request Acknowledge information and change detection information by base station controller 32, be not limited to the ability of core net, producer, terminal, improved the success rate of switching across under exchange control device scene.
Fig. 4 is the example structure figure of base station controller of the present invention.As shown in Figure 4, the present embodiment comprises time block 42, for the first Preset Time threshold value is set; Receive control module 44, while receiving the switching access information of terminal transmission for the handover request information sending at the exchange control device prior to core net, buffer memory switches access information, until carry out follow-up switching flow receive handover request information in the first Preset Time threshold value time.
When concrete operations, base station controller can also comprise: send control module 46, for receiving after switching access information and handover request information, first send Handover Request Acknowledge information to exchange control device, after the second Preset Time threshold value, send change detection information again, wherein the second Preset Time threshold value is arranged by time block 42.Time block 42 can comprise first timer 422 for the first Preset Time threshold value is set and for the second timer 424 of the second Preset Time threshold value is set.
It will be understood by those skilled in the art that in the handover operation of each embodiment of the present invention that base station controller receives signal and needed two time thresholds of transmitted signal and can be provided or two timers provide respectively by a time block 36; In addition, each embodiment of the present invention can be used in the switching of miscellaneous service, as speech business etc.
The present embodiment is formerly received and is switched when access information that buffer memory switches access information until carry out follow-up switching flow while receiving handover request information in the first Preset Time threshold value that cache-time arranges at time block 42 by receiving control module 44, improved the success rate of switching with speech business under exchange control device scene; In addition, successively send Handover Request Acknowledge information and change detection information by sending control module 46, be not limited to the ability of core net, producer, terminal, improved the success rate of switching across under exchange control device scene.
Finally it should be noted that: these are only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a control method that is switched to 2G network, is characterized in that, comprises the following steps:
When base station controller receives in the handover request information sending prior to exchange control device the switching access information that terminal sends, switch access information described in buffer memory;
Described base station controller is received described handover request information in the time that cache-time is less than the first Preset Time threshold value, carries out follow-up switching flow;
Described follow-up switching flow comprises:
Described base station controller, receiving after described switching access information and handover request information, first sends Handover Request Acknowledge information to described exchange control device, then sends change detection information after the second Preset Time threshold value.
2. the control method that is switched to 2G network according to claim 1, is characterized in that, also comprises before the step of receiving the switching access information that terminal sends prior to the handover request information of exchange control device transmission at described base station controller:
Network control unit, in the time of the response of receiving described base station controller, sends switching command and sends re-positioning request to described exchange control device to described terminal simultaneously;
Described terminal is being received after described switching command, is being sent described switching access information to described base station controller;
Described exchange control device is being received after described re-positioning request, is being sent described handover request information to described base station controller.
3. the control method that is switched to 2G network according to claim 2, is characterized in that, also comprises after switching the step of access information described in described buffer memory:
Described base station controller abandons described switching access information do not receive described handover request information in described the first Preset Time threshold value time, finish switching flow.
4. the control method that is switched to 2G network according to claim 2, is characterized in that, described network control unit comprises: the network control unit in LTE, 3G and 2G network; Described exchange control device comprises mobile switching centre in 3G and 2G network and the Mobility Management Entity in LTE.
5. a control device that is switched to 2G network, is characterized in that, this device comprises:
Control module, for controlling base station controller in the time that the handover request information sending prior to core net exchange control device is received the switching access information of terminal transmission, described in buffer memory, switch access information, until carry out follow-up switching flow receive described handover request information in the first Preset Time threshold value time;
Time block, for arranging described the first Preset Time threshold value;
Described follow-up switching flow comprises:
Described base station controller, receiving after described switching access information and handover request information, first sends Handover Request Acknowledge information to described exchange control device, then sends change detection information after the second Preset Time threshold value.
6. the control device that is switched to 2G network according to claim 5, is characterized in that, described control module comprises:
Receive control module, be used for controlling described base station controller in the time receiving described switching access information prior to described handover request information, described in buffer memory, switch access information, until carry out follow-up switching flow receive described handover request information in the first Preset Time threshold value time;
Send control module, being used for controlling described base station controller is receiving after described switching access information and handover request information, first send Handover Request Acknowledge information to described exchange control device, after the second Preset Time threshold value, send change detection information again, wherein said the second Preset Time threshold value is arranged by described time block.
7. a base station controller, is characterized in that, comprising:
Time block, for arranging the first Preset Time threshold value;
Receive control module, while receiving the switching access information of terminal transmission for the handover request information sending at the exchange control device prior to core net, described in buffer memory, switch access information, until carry out follow-up switching flow receive described handover request information in described the first Preset Time threshold value time;
Described follow-up switching flow comprises:
Receiving after described switching access information and handover request information, first send Handover Request Acknowledge information to described exchange control device, then send change detection information after the second Preset Time threshold value.
8. base station controller according to claim 7, is characterized in that, also comprises:
Send control module, for receiving after described switching access information and handover request information, first send Handover Request Acknowledge information to described exchange control device, after the second Preset Time threshold value, send change detection information again, wherein said the second Preset Time threshold value is arranged by described time block.
9. base station controller according to claim 8, is characterized in that, described time block comprises the first timer for described the first Preset Time threshold value is set, and for the second timer of described the second Preset Time threshold value is set.
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| CN201010130870.2A CN102202359B (en) | 2010-03-22 | 2010-03-22 | Control method and apparatus thereof for handover of 2G network, and base station controller |
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| CN102202359B true CN102202359B (en) | 2014-08-06 |
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| CN102572973A (en) * | 2012-02-02 | 2012-07-11 | 中兴通讯股份有限公司 | Information processing method for network switching of user equipment (UE) and base station |
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| CN1529532A (en) * | 2003-10-17 | 2004-09-15 | 中兴通讯股份有限公司 | WCDMA to PHS system changing over executing method |
| CN1893720A (en) * | 2005-07-08 | 2007-01-10 | 华为技术有限公司 | Method of switching-over between systems |
| CN1917695A (en) * | 2005-08-19 | 2007-02-21 | 华为技术有限公司 | Method for incressing success ratio of switching to 2G network system from 3G network system |
| CN101483896A (en) * | 2008-01-08 | 2009-07-15 | 华为技术有限公司 | Method and device for switching into CS network, measuring CS network, implementing CS service |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4504379B2 (en) * | 2003-10-24 | 2010-07-14 | クゥアルコム・インコーポレイテッド | Handoff between wireless local area network and cellular communication system |
| US8526950B2 (en) * | 2003-12-30 | 2013-09-03 | Nokia Corporation | Determining handover based on state of mobile terminal |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529532A (en) * | 2003-10-17 | 2004-09-15 | 中兴通讯股份有限公司 | WCDMA to PHS system changing over executing method |
| CN1893720A (en) * | 2005-07-08 | 2007-01-10 | 华为技术有限公司 | Method of switching-over between systems |
| CN1917695A (en) * | 2005-08-19 | 2007-02-21 | 华为技术有限公司 | Method for incressing success ratio of switching to 2G network system from 3G network system |
| CN101483896A (en) * | 2008-01-08 | 2009-07-15 | 华为技术有限公司 | Method and device for switching into CS network, measuring CS network, implementing CS service |
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