CN1964551A - A method to realize soft hand-over of group call in CDMA cluster system - Google Patents
A method to realize soft hand-over of group call in CDMA cluster system Download PDFInfo
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- CN1964551A CN1964551A CNA2005101013103A CN200510101310A CN1964551A CN 1964551 A CN1964551 A CN 1964551A CN A2005101013103 A CNA2005101013103 A CN A2005101013103A CN 200510101310 A CN200510101310 A CN 200510101310A CN 1964551 A CN1964551 A CN 1964551A
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Abstract
The related soft switching method for group calling in CDMA cluster system comprises: MS adds the pilot signal with strength over dynamic adding threshold into candidate set; BSC decides to take soft switching according to neighbor area and resource allocation and indicate BS to allocate wireless resource; BS allocates basic channel and compensated channel for new-added pilot signal; the mobile plant adds the pilot signal met condition into the effective set; MS sends pilot strength detection report when detecting some signal strength less than threshold; BSC decides to remove the signal from effective set and send switching information; MS removes channels and returns finish information; and BSC notifies BS to release wireless resource. This invention can improve switching reliability.
Description
Technical field
The present invention relates to field of mobile communication, relate in particular to based on group calling in the Digital Clustering field of CDMA (Code Division MultipleAccess, code division multiple access) standard and switch.
Background technology
Along with mechanics of communication in the increasingly extensive application of every field such as economic and social life, also strengthen day by day for the trunking communication technology requirement of one-to-many.Because the continuous fast development of mechanics of communication, the user no longer has been satisfied with the simulation Clustering of current widespread usage, and is had higher requirement in aspects such as high security, grouping flexibly, lamprophonia, perfect in shape and function.So Digital Clustering arises at the historic moment, every function of being close to the users simultaneously and its implementation also become the focus of research and development.Soft handover is that travelling carriage begins with new base station communication but do not interrupt a kind of switching mode of it and original base station communication immediately.Soft handover can only carry out in the CDMA Channel of same frequency, is a big characteristic of cdma system.
At present, about group call soft handover aspect, also there is not the correlation technique introduction at the CDMA digital cluster system.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the shortcoming that can't realize the group call soft handover in the existing CDMA mode cluster system, propose a kind of method that realizes soft handover in group system, this method can fully be taken into account the reliability of switching and handover success rate etc.
The method that realizes the group calling soft handover in CDMA cluster system that the present invention proposes comprises that soft handover adds with soft handover, and soft handover adds and comprises:
First step travelling carriage (MS) detects certain pilot signal strength of concentrating the adjacent area and surpasses dynamically adding thresholding, this pilot signal is joined in the Candidate Set, and pass through base station (BTS Base Transceiver System) to base station controller (BSC, Base Station Controller) transmission pilot strength measurement report;
The second step base station controller inquires sub-district, the current place of user, if current area is in same base station controller (BSC) with need newly adding the sub-district, then judges and can do inner soft handover this moment, indication base station assigns Radio Resource;
The 3rd step base station is according to having existed primary channel and complement channel parameter, distribution need newly add the primary channel and the complement channel resource of pilot tone and informing base station controller; If there is not satisfactory resource, then notice failure; Concrete method of distributing is put idling-resource mark and is used these resources for finding idle money wash rice by looking into database.
The 4th step base station controller joins the Candidate Set pilot signal that satisfies condition in the active set by base station indication travelling carriage and goes; Satisfying condition here is meant that pilot signal strength surpasses dynamic threshold and protects the long period, and distributes resource.
The 5th moved further platform finishes primary channel and complement channel switches, by base station informing base station controller;
Soft handover goes may further comprise the steps:
The intensity that first step travelling carriage detects certain pilot signal in the current active set is lower than dynamic switching and removes threshold value, goes timer then in switching, sends pilot strength measurement report by the base station to base station controller;
The pilot signal measurement report that the base station controller analysis of second step is received, judgement need be concentrated from effective pilot signal and be removed this signal, send switch indicating information by the base station, and the indication travelling carriage is rejected this pilot signal from active set;
The 3rd moved further platform removes corresponding primary channel and complement channel, sends handoff completion message again, switches by base station informing base station controller and finishes;
The 4th step base station controller informing base station discharges corresponding radio resource.
In such scheme, can also comprise in soft handover adds: if travelling carriage handoff failure or base station side timer expiry terminal do not return success yet, then the base station can discharge respective resources.
Described primary channel and complement channel parameter, be meant frame biasing, pilot tone or radio configuration parameters (RC, RadioConfiguration).
Described with the Candidate Set pilot signal that satisfies condition, be meant that pilot signal strength surpasses dynamic adding thresholding and keeps the long period, and distributed resource.
Adopt the method for the invention, can be implemented in group calling soft handover function in the group system, and highly reliable performance of handoffs can be provided.
Description of drawings
Fig. 1 is the process chart that the travelling carriage group calling soft handover among the present invention adds;
Fig. 2 is the process chart that the travelling carriage group calling soft handover among the present invention goes.
Embodiment
Be described below in conjunction with the enforcement of accompanying drawing technical scheme of the present invention:
Fig. 1 is the process chart that travelling carriage group calling soft handover adds:
101.MS be in the group call conversation;
Surpass dynamically adding thresholding 102.MS detect certain pilot signal strength of concentrating the adjacent area, this pilot signal is joined in the Candidate Set, and send pilot strength measurement report to BSC transmission pilot strength measurement report to the base station by BTS;
103.BSC, the soft handover that whether can do BSC inside is judged according to adjacent area situation and current resource situation of having distributed; Particularly, base station controller inquires sub-district, the current place of user, compares current area and need newly add the sub-district whether judge whether to do inner the switching in same BSC.If in same BSC, then can.
104.BSC judge and to do under the situation of soft handover that indication BTS is user's distributing radio resource, and with the complement channel parameter, group number etc. bring BTS;
Tell the resource that meets the requirement of group calling soft handover 105.BTS call database;
106.BTS notice BSC resource allocation success; If 105 steps were not told resource, then BTS returns BSC resource allocation failure, and soft handover just finishes;
Add 107.BSC do soft handover by BTS notice MS, the Candidate Set pilot signal that is about to satisfy condition joins in the active set goes;
108.MS add BTS channel and complement channel respectively, then by BTS notice BSC handover success; As if the base station timer expiry, do not receive the handover success of MS yet, then handoff failure discharges Resources allocation.
Fig. 2 is the process chart that travelling carriage group calling soft handover goes:
201.MS be in the group call conversation;
202.MS detect certain pilot signal in the current active set intensity be lower than dynamic switching and remove threshold value, send pilot strength measurement report by BTS to BSC;
203.BSC whether analyze the pilot signal measurement report receive judges removing to switch;
204.BSC need remove under the situation of soft handover in judgement, send switch indicating information by BTS, the indication travelling carriage is rejected this pilot signal from active set;
205.MS remove BTS channel and complement channel respectively, switch by BTS notice BSC then and go successfully; As if the base station timer expiry, do not receive the handover success of MS yet, then handoff failure;
206.BSC indication BTS discharges relevant Radio Resource;
207.BTS discharge the Radio Resource that this BTS channel and complement channel take.
Claims (5)
1, a kind of method that realizes the group calling soft handover in CDMA cluster system comprises that soft handover adds with soft handover, and soft handover adds and comprises:
First step travelling carriage detects certain pilot signal strength of concentrating the adjacent area and surpasses dynamically adding thresholding, this pilot signal is joined in the Candidate Set, and send pilot strength measurement report by the base station to base station controller;
The second step base station controller inquires sub-district, the current place of user, if current area is in same BSC with need newly adding the sub-district, and indication base station assigns Radio Resource;
The 3rd step base station is according to having existed primary channel and complement channel parameter, distribution need newly add the primary channel and the complement channel resource of pilot tone and informing base station controller; If there is not satisfactory resource, then notice failure;
The 4th step base station controller joins the Candidate Set pilot signal that satisfies condition in the active set by base station indication travelling carriage and goes;
The 5th moved further platform finishes primary channel and complement channel switches, by base station informing base station controller;
Soft handover goes may further comprise the steps:
The intensity that first step travelling carriage detects certain pilot signal in the current active set is lower than dynamic switching and removes threshold value, goes timer then to send pilot strength measurement report by the base station to base station controller in the back in switching;
The pilot signal measurement report that the base station controller analysis of second step is received, judgement need be concentrated from effective pilot signal and be removed this signal, send switch indicating information by the base station, and the indication travelling carriage is rejected this pilot signal from active set;
The 3rd moved further platform removes corresponding primary channel and complement channel, sends message, and the informing base station controller switches to be finished;
The 4th step base station controller informing base station discharges corresponding radio resource.
2, the described method that in CDMA cluster system, realizes the group calling soft handover of claim 1, it is characterized in that, also comprise in soft handover adds: if travelling carriage handoff failure or base station side timer expiry terminal do not return success yet, then the base station can discharge respective resources.
3, claim 1 or the described method that realizes the group calling soft handover in CDMA cluster system is characterized in that described primary channel and complement channel parameter are meant frame biasing, pilot tone or radio configuration parameters.
4, claim 1 or the described method that in CDMA cluster system, realizes the group calling soft handover, it is characterized in that, described distribution need newly add the primary channel of pilot tone and the method for complement channel resource is, by looking into database, know which resource free time, put mark then, and use these resources.
5, claim 1 or the described method that in CDMA cluster system, realizes the group calling soft handover, it is characterized in that, described with the Candidate Set pilot signal that satisfies condition, be meant that pilot signal strength surpasses dynamic adding thresholding and keeps the long period, and distributed resource.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2005101013103A CN1964551A (en) | 2005-11-08 | 2005-11-08 | A method to realize soft hand-over of group call in CDMA cluster system |
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| CNA2005101013103A CN1964551A (en) | 2005-11-08 | 2005-11-08 | A method to realize soft hand-over of group call in CDMA cluster system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009043314A1 (en) * | 2007-09-28 | 2009-04-09 | Huawei Technologies Co., Ltd. | A call controlling method, base station subsystem and user terminal |
| WO2009127105A1 (en) * | 2008-04-16 | 2009-10-22 | 中兴通讯股份有限公司 | A reporting method and a reporting mechanism configuration method for the pilot in the traditional group call |
| CN101790213A (en) * | 2009-12-30 | 2010-07-28 | 中兴通讯股份有限公司 | Soft-switching residential area assigning method and BSC (base station controller) for trunking communication system |
| CN101415215B (en) * | 2007-10-19 | 2010-09-01 | 联芯科技有限公司 | Method and apparatus for measuring adjacent zone of multi-mode terminal |
| CN101980566A (en) * | 2010-10-26 | 2011-02-23 | 中兴通讯股份有限公司 | Method and system for realizing switching on stand-alone dedicated control channel |
| CN101179776B (en) * | 2007-12-06 | 2011-07-13 | 中兴通讯股份有限公司 | Method and system for cluster terminal to fast switch waiting listing |
| WO2013123821A1 (en) * | 2012-02-24 | 2013-08-29 | 华为终端有限公司 | Method and device for controlling cell reselection |
| CN102204326B (en) * | 2008-11-03 | 2014-04-02 | 北电网络有限公司 | Wireless communication clustering method and system for coordinated multi-point transmission and reception |
| CN105635982A (en) * | 2014-11-02 | 2016-06-01 | 北京信威通信技术股份有限公司 | LTE cluster group calling extension method |
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2005
- 2005-11-08 CN CNA2005101013103A patent/CN1964551A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101400096B (en) * | 2007-09-28 | 2010-06-16 | 华为技术有限公司 | Call control method, base station subsystem and user terminal |
| WO2009043314A1 (en) * | 2007-09-28 | 2009-04-09 | Huawei Technologies Co., Ltd. | A call controlling method, base station subsystem and user terminal |
| CN101415215B (en) * | 2007-10-19 | 2010-09-01 | 联芯科技有限公司 | Method and apparatus for measuring adjacent zone of multi-mode terminal |
| CN101179776B (en) * | 2007-12-06 | 2011-07-13 | 中兴通讯股份有限公司 | Method and system for cluster terminal to fast switch waiting listing |
| WO2009127105A1 (en) * | 2008-04-16 | 2009-10-22 | 中兴通讯股份有限公司 | A reporting method and a reporting mechanism configuration method for the pilot in the traditional group call |
| CN102204326B (en) * | 2008-11-03 | 2014-04-02 | 北电网络有限公司 | Wireless communication clustering method and system for coordinated multi-point transmission and reception |
| CN101790213A (en) * | 2009-12-30 | 2010-07-28 | 中兴通讯股份有限公司 | Soft-switching residential area assigning method and BSC (base station controller) for trunking communication system |
| WO2011079665A1 (en) * | 2009-12-30 | 2011-07-07 | 中兴通讯股份有限公司 | Method and base station controller for soft handover cell assignment in group communication system |
| CN101790213B (en) * | 2009-12-30 | 2014-09-10 | 中兴通讯股份有限公司 | Soft-switching residential area assigning method and BSC (base station controller) for trunking communication system |
| CN101980566B (en) * | 2010-10-26 | 2015-06-10 | 中兴通讯股份有限公司 | Method and system for realizing switching on stand-alone dedicated control channel |
| CN101980566A (en) * | 2010-10-26 | 2011-02-23 | 中兴通讯股份有限公司 | Method and system for realizing switching on stand-alone dedicated control channel |
| CN103298045A (en) * | 2012-02-24 | 2013-09-11 | 华为终端有限公司 | Method and device for controlling cell reselection |
| WO2013123821A1 (en) * | 2012-02-24 | 2013-08-29 | 华为终端有限公司 | Method and device for controlling cell reselection |
| US9253690B2 (en) | 2012-02-24 | 2016-02-02 | Huawei Device Co.,Ltd | Method and apparatus for controlling cell reselection |
| CN103298045B (en) * | 2012-02-24 | 2016-08-10 | 华为终端有限公司 | A kind of method and apparatus controlling cell reselection |
| CN105635982A (en) * | 2014-11-02 | 2016-06-01 | 北京信威通信技术股份有限公司 | LTE cluster group calling extension method |
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