CN1314296C - Method for realizing hard changing-over in CDMA cluster system - Google Patents
Method for realizing hard changing-over in CDMA cluster system Download PDFInfo
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- CN1314296C CN1314296C CNB2004100276395A CN200410027639A CN1314296C CN 1314296 C CN1314296 C CN 1314296C CN B2004100276395 A CNB2004100276395 A CN B2004100276395A CN 200410027639 A CN200410027639 A CN 200410027639A CN 1314296 C CN1314296 C CN 1314296C
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Abstract
The present invention discloses a method for realizing hard switch in a code division multiple access cluster system in a mobile communication system. The present invention comprises that a base station system processes a switch request of a mobile station; a base station system at a target side and a cluster dispatching server process the switch request; after the switch is successful, a base station system at an original side and the cluster dispatching server process release. The present invention overcomes the defect that the existing CDMA systematic cluster system can not realize the hard switch of a cluster crossing dispatching server; in the cluster system, the present invention can realize the function of hard switch comprising base station crossing hard switch and dispatching server crossing hard switch; the switch is realized, and simultaneously, the indexes of the reliability, the success ratio, the time delay, etc. of the switch are fully satisfied, and the requirements of charge is satisfied.
Description
Technical field
The present invention relates to field of mobile communication, relate in particular to (Code DivisionMultiple Access based on CDMA, code division multiple access) strides PDC (PTTDispatch Client in the common network Digital Clustering field of standard, dispatching client)/BSC (Base Station Controller, base station controller) and stride the implementation method of the direct-cut operation of PDS (PTT Dispatch Server, dispatch server).
Background technology
Along with mobile communcations system in the increasingly extensive application of every field such as economic and social life, mobile communcations system technology itself is also among fast development, from at present just at widely used second generation mobile communcations system, arrive ripe perfect third generation mobile system, the demand of user for communication system satisfied in technical development day by day.More more and more effectively satisfy the demand of appreciation type business such as comprising image, audio frequency, real-time multimedia service interaction, thereby making mobile communication system in people's live and work, bring into play more and more important effect.Wherein, trunking communication has become an indispensable business tine day by day, and digital cluster system is an important branch of mobile communication system.Digital cluster system is meant one group of wireless channel of multiple users share, and dynamically use the dedicated mobile communications subsystem of these channels, it is a kind of commander, dispatching patcher, in some social economies, the relatively advanced country of industrial or agricultural, the departments such as enterprise, cause, industrial and mineral, oil field, farm, public security, police and army that commander, scheduling feature are had relatively high expectations all very press for this system.The conventional cluster grid all is a dedicated network, and network often is exclusive the use, in use, often also is that the phone interconnect services is auxilliary based on group service (group calling, secret exhale etc.), and this network is commonly referred to as the private network cluster.The common network trunked communication system combines public communication network system and specific schedule communication system, on public communication network, makes trunked communication system break away from the specific-dispatching communication system in function and regional limitation.Whole network safeguards that by an operator operator provides the specific schedule platform to the user of collective, utilizes the network infrastructure of sharing with other colony to form VPN, thereby makes the user can use the proprietary network function, Here it is common network cluster.Because whole network is safeguarded by an operator, provides service to various places, terminal can be roamed in whole network freely, has therefore overcome the restriction of geographic area.On the other hand, owing to the expansion of geographic area, considered user's mobility, not only to realize handoff functionality in the zonule, when the user is crossed over Da Qu, for guaranteeing not call drop, for the user provides the favorable service quality, therefore need to realize that complete handoff functionality guarantees this point.In the cdma system network of non-cluster, realized striding (the MSC of mobile switching centre, Mobile Swith Center) hard handover approach, but charging, Channel Sharing requirement when adopting this hard handover approach can't satisfy group service to carry out direct-cut operation can't realize striding simultaneously the direct-cut operation of PTT.
Summary of the invention
The objective of the invention is to overcome the shortcoming that can't realize striding the trunking dispatch server direct-cut operation in the existing CDMA mode cluster system, in the hope of can in group system, realizing the direct-cut operation function, comprise the direct-cut operation of striding the base station and stride the dispatch server direct-cut operation, when realizing switching, fully take into account the index such as reliability, handover success rate, handover delay of switching, take into account the demand of charging simultaneously.
For achieving the above object, the present invention proposes the method that realizes direct-cut operation in a kind of CDMA mode cluster system, relate to the group system network of forming by PDS, cluster client end, base station system (BSS, Base StationSystem), MSC, it is characterized in that, may further comprise the steps:
First step source base station system handles travelling carriage pilot strength report: satisfy trunked call direct-cut operation condition if the base station is judged, then send handoff request to target BS C by MSC;
The second step target side (target BS system, target dispatch server) is handled handoff request: target BS at first obtains handover relevant information to PDS, sending to PDC then (is to set up by the A8D interface, this interface is the interface between base station and the PDC in the CDMA colony communication system) set up message, whether PDC is according to being that first user on this PDC of certain group sends registration message to PDS;
Behind the 3rd step handover success, source is handled release: whether PDC is according to being that last user on this PDC of this group judges whether that needs tear chain open.
The described first step further may further comprise the steps:
(1) base station system is carried out switch decision after receiving the pilot strength report of travelling carriage, judges whether to satisfy the condition of direct-cut operation; The condition that judges whether to satisfy direct-cut operation is whether target pilot intensity satisfies and switch requirement;
(2) base station system sends handoff request by mobile switching centre to target base station controller, carries IP (Internet Protocol) address information of source dispatch server in the handoff request;
Described second step further may further comprise the steps:
(1) after target BS is received handoff request message, be judged as trunked call one time according to business option, and send handoff request by dispatching client to the target dispatch server and obtain the relevant information (as organization identification) of this group, or adopt unified computing formula to calculate, for imponderable information, obtain to the target dispatch server;
(2) the target dispatch server is received after the handoff request, and judge it is the switching of a PDS inside or the switching of striding PDS according to the dispatch server IP address, source in the message: if the switching of PDS inside, PDS issues target BS after finding call information; If switch between PDS, target P DS is a user resource allocation, obtains call information according to the IP address from source PDS simultaneously, sends to target BS;
(3) after target BS is received the switching response message of PDS, Resources allocation set up airlink, and meanwhile notify dispatching client to set up the A8D link;
(4) dispatching client is first user of this group really if judge it when setting up the A8D link, the charge information that dispatching client was registered and carried the sign link setup and begin to charge to PDS; If not first user of this group, charge information is registered and carried to dispatching client to PDS, but only comprise the information that begins to charge, and need not link setup information.
Described the 3rd step further may further comprise the steps:
(1) behind the target side handover success, mobile switching centre initiates to discharge the source resource, on one side the source base station system discharges the on-air radio link circuit resource, notifies dispatching client release A8D link simultaneously and stops charging;
(2) dispatching client judges that at first discharging is last user on this dispatching client of this group after receiving A8D link release message:
If last user judges whether this release is because the release that handover success causes: if it is that a handover success goes that dispatch server is judged, then notify dispatch server to tear chain open, the notice dispatch server stops to charge, and dispatching client is initiated registration, carries to stop charge information; If not, dispatch server judges it is not once to switch release, then initiates to tear open the chain registration to PDS, does not carry charge information, PDS removes call-related information;
Last user if not this group, do not tear the chain operation open, but judge whether this release request causes owing to switching to other dispatching clients: if, after switching is gone, the notice dispatch server stops to charge, and dispatching client sends registration message to dispatch server, carries charge information, after PDS receives message, stop charging to this A10D link; If not, dispatching client is deleted this user's information from user message table, and the base station sends A8Dd link Release complete.
Adopt the method for the invention, realized again direct-cut operation function in the group system, and highly reliable performance of handoffs can be provided, make the user when trans-regional conversation, can guarantee not call drop.And comprehensive charge information is provided, can realize the charging way of flexibility and reliability.In addition, also provide complete handoff functionality, can not only realize striding the direct-cut operation of BSC/PDC, also can realize striding the direct-cut operation function of PDS.
Description of drawings
Fig. 1 be in the method for the invention source base station to the process chart of travelling carriage pilot measurement reports;
Fig. 2 be in the method for the invention target BS/dispatching client to the handoff request process chart;
Fig. 3 be in the method for the invention dispatch server to the handoff request process chart;
Fig. 4 is source base station in the method for the invention/dispatching client handover success process chart.
Embodiment
Further describe the enforcement of technical scheme in real system in detail below in conjunction with accompanying drawing:
Fig. 1 is that source base station is to travelling carriage pilot measurement reports process chart.Specifically may further comprise the steps:
101. base station system is received the pilot frequency intensity that travelling carriage reports, system adjudicates according to travelling carriage whether needs ask switching to go back and the preliminary ruling switching type;
102. the further decision system resource of system, whether judgement satisfies trunked call switches the resource needed situation;
If 103. determine and can switch, and judge at this moment the sub-district that needs to switch not at this BSC, judges between two BSC whether interconnecting relation is arranged, finally to determine switching type.When interconnecting relation is arranged, also to judge whether to satisfy the condition that trunked call carries out soft handover between BSC;
If 104. judgement is direct-cut operation between BSC, base station system is obtained the IP address of the dispatch server of current use, sends handoff request by mobile switching centre to target BS C simultaneously, the IP address of carrying source PDS in the message enters 105 then;
105. base station system notice dispatching client changes current user state, no longer gives out a contract for a project toward this user when duplicating distributing data, finishes then;
1041. if judgement is then carried out soft handoff procedure between BSC for soft handover between BSC, finish then.
Fig. 2 is that target BS/dispatching client is to the handoff request process chart.Specifically may further comprise the steps:
201. the handoff request message of sent from mobile switching center is received by the target BS system, judges whether this base station supports group service, if do not support, directly returns switch failure information, if support, then changes 202;
202. it is the direct-cut operation of a group service that base station system is judged, need obtain more detailed information and support to switch execution, the base station sends handoff request message by dispatching client to dispatch server;
203. dispatch server distributes related resource, and returns handoff response to base station system.After base station system was received message, Resources allocation began to set up airlink, and the notice dispatching client is set up the A8D link;
204. dispatching client receives that A8D sets up after the request, judges whether it is first user on client of this group, if first user then changes 205 and handles; Otherwise changeing 2051 handles;
205. the charge information that cluster client end was registered and carried the sign link setup and begin to charge to trunking dispatch server;
2051. charge information is registered and carried to cluster client end to trunking dispatch server, but only comprise the information that begins to charge.
Fig. 3 is that dispatch server is to the handoff request process chart.Specifically may further comprise the steps:
301. dispatch server is received the handoff request message that dispatching client is sent, and extracts the IP address of source dispatch server from message;
302. whether dispatch server is the IP address of source dispatch server relatively, see identically with self, if identical commentaries on classics 303 is handled, handles otherwise change 3031;
If 303. PDS judge the PDS of source and oneself be not same PDS, be this user resource allocation just, and establishment corresponding call process, enter 304 then;
3031. if PDS judges that the PDS of source is exactly self, so find corresponding process, obtain the switching related data according to user and group information, enter 305 then;
304. PDS searches and obtains handover relevant information according to the source PDS IP address in the handoff request message on network, enter 305 then;
305. PDS constructs switching response message, responds and gives relevant base station.
Fig. 4 is source base station/dispatching client handover success process chart.Specifically may further comprise the steps:
401. after handover success, mobile switching centre initiates the release of source resource, base station system is at first initiated the request that the A8D link discharges to dispatching client;
402. dispatching client receives that the A8 link discharges after the request message, at first judges whether it is last user of this group: if not, change 405 and handle; If change 403 and handle;
403. whether be because release that handover success cause: if then walk handover success flow process 4041 if judging this release; If not, then walk to call out to discharge flow process 404;
404. it is not once to switch release that dispatch server is judged, then initiates to tear open the chain registration to PDS, it is 0 that life cycle promptly is set, and does not carry charge information, and PDS removes call-related information;
4041. it is that a handover success goes that dispatch server is judged, then not only will notify dispatch server to tear chain open, it is 0 that life cycle promptly is set, and also will notify dispatch server to stop to charge, and dispatching client is initiated registration, carries to stop charge information;
405. if not last user, then do not need to tear open chain, but need also to judge whether this this release request causes owing to switching to other dispatching clients: if handoff request then needs to notify dispatch server, transfers 4061 to; If not, then transfer 406 to;
406. dispatching client is deleted this user's information from user message table, and the base station sends A8Dd link Release complete;
Though 4061. do not need to tear open chain, after switching is gone, need the notice dispatch server stop to charge, dispatching client sends registration message to dispatch server, carries charge information, after PDS receives message, stops the charging to this A10D link.
The direct-cut operation implementation that the present invention proposes has solved various switching needs of common network cluster field effectively, provides reliable link to guarantee, and perfect charge informations in a large number are provided.Can use in the trunking communication field, particularly based on the common network trunking communication field of CDMA technology.
Claims (5)
1, realize the method for direct-cut operation in a kind of code division multiple access mode cluster system, relate to the group system network of forming by trunking dispatch server, cluster client end, base station system, mobile switching centre, it is characterized in that, may further comprise the steps:
First step source base station system handles travelling carriage pilot strength report: satisfy trunked call direct-cut operation condition if the base station is judged, then send handoff request to target base station controller by mobile switching centre;
Second step base station at target side and the trunking dispatching server process handoff request: the target side base station at first obtains handover relevant information to trunking dispatch server, send to cluster client end then and set up message, cluster client end sends registration message according to whether being first user on this cluster client end of certain group to trunking dispatch server;
Behind the 3rd step handover success, the base station system and the trunking dispatch server of source are handled release: whether cluster client end is according to being that last user on this cluster client end of this group judges whether that needs tear chain open.
2, realize the method for direct-cut operation in the code division multiple access mode cluster system according to claim 1, it is characterized in that the described first step specifically may further comprise the steps:
(1) base station system is carried out switch decision after receiving the pilot strength report of travelling carriage, judges whether to satisfy the condition of direct-cut operation;
(2) base station system sends handoff request by mobile switching centre to target base station controller, carries the IP address information of source trunking dispatch server in the handoff request.
3, realize the method for direct-cut operation in the code division multiple access mode cluster system according to claim 2, it is characterized in that the condition that judges whether to satisfy direct-cut operation in the described step (1) is whether target pilot intensity satisfies and switch requirement.
4, realize the method for direct-cut operation in the code division multiple access mode cluster system according to claim 1, it is characterized in that described second step specifically may further comprise the steps:
(1) after target BS is received handoff request message, is judged as trunked call one time, and obtains the relevant information of this group to target trunking dispatch server transmission handoff request by cluster client end according to business option;
(2) the target trunking dispatch server is received after the handoff request, judge it is the switching of trunking dispatch server inside or the switching of striding trunking dispatch server according to the trunking dispatch server IP address, source in the message, if the switching of trunking dispatch server inside, trunking dispatch server is issued target BS after finding call information; If switch between trunking dispatch server, the target trunking dispatch server is a user resource allocation, obtains call information according to the IP address from the source trunking dispatch server simultaneously, sends to target BS;
(3) after target BS was received the switching response message of trunking dispatch server, Resources allocation was set up airlink, notified cluster client end to set up link simultaneously;
(4) dispatching client is first user of this group really if judge it when setting up link, the charge information that cluster client end was registered and carried the sign link setup and begin to charge to trunking dispatch server; If not first user of this group, charge information is registered and carried to cluster client end to trunking dispatch server, but only comprise the information that begins to charge.
5, realize the method for direct-cut operation in the code division multiple access mode cluster system according to claim 1, it is characterized in that described the 3rd step specifically may further comprise the steps:
(1) behind the target side handover success, mobile switching centre initiates to discharge the source resource, and the source base station system discharges the on-air radio link circuit resource, notifies cluster client end release A8D link simultaneously and stops charging;
(2) cluster client end judges that at first discharging is last user on this cluster client end of this group after receiving the link release message;
If last user judges whether this release is because the release that handover success causes: if it is that a handover success goes that dispatch server is judged, then notify dispatch server to tear chain open, the notice dispatch server stops to charge, and dispatching client is initiated registration, carries to stop charge information; If not, dispatch server judges it is not once to switch release, then initiates to tear open the chain registration to PDS, does not carry charge information, PDS removes call-related information;
Last user if not this group, do not tear the chain operation open, but judge whether this release request causes owing to switching to other dispatching clients: if, after switching is gone, the notice dispatch server stops to charge, and dispatching client sends registration message to dispatch server, carries charge information, after PDS receives message, stop charging to this A10D link; If not, dispatching client is deleted this user's information from user message table, and the base station sends A8Dd link Release complete.
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| CNB2004100276395A CN1314296C (en) | 2004-06-12 | 2004-06-12 | Method for realizing hard changing-over in CDMA cluster system |
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| CNB2004100276395A CN1314296C (en) | 2004-06-12 | 2004-06-12 | Method for realizing hard changing-over in CDMA cluster system |
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| CN1314296C true CN1314296C (en) | 2007-05-02 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101064614B (en) * | 2006-04-30 | 2011-04-20 | 华为技术有限公司 | Dual-broadcasting charging method in microwave access global intercommunication system |
| CN100441002C (en) * | 2006-09-19 | 2008-12-03 | 华为技术有限公司 | A method to reselect and quickly return to group call under optimal group receiving |
| CN100508633C (en) * | 2007-03-30 | 2009-07-01 | 华为技术有限公司 | Group switching method and device |
| CN101137227B (en) * | 2007-06-18 | 2010-06-23 | 中兴通讯股份有限公司 | Hard handoff method in digital cluster system |
| CN101137231B (en) | 2007-07-31 | 2010-11-10 | 中兴通讯股份有限公司 | Terminal registering method and device based on CDMA cluster system |
| CN101577953B (en) * | 2009-06-09 | 2013-01-16 | 中兴通讯股份有限公司 | Soft handover method and system in trunking communication |
| US9629048B2 (en) * | 2011-09-29 | 2017-04-18 | Samsung Electronics Co., Ltd. | Mobile communication system and method of information processing for improving user experience in the mobile communication system |
| CN102413533B (en) * | 2011-12-26 | 2017-11-28 | 中兴通讯股份有限公司 | Group calling lower base station controller interconnected method, device and base station controller |
| CN103916380B (en) * | 2012-12-28 | 2018-09-18 | 北京大唐高鸿数据网络技术有限公司 | The method for realizing graded dispatching is encapsulated by operation layer |
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| US20040109425A1 (en) * | 2002-12-06 | 2004-06-10 | Scribano Gino A. | Method and apparatus for improving hard handoffs in CDMA systems |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000036981A (en) * | 1998-07-17 | 2000-02-02 | Nippon Telegr & Teleph Corp <Ntt> | Electromagnetic interference control method for radio communication system |
| WO2003003782A1 (en) * | 2001-06-27 | 2003-01-09 | Nec Corporation | Cdma mobile communication system and its call cut-off prevention method |
| US20030232621A1 (en) * | 2002-06-14 | 2003-12-18 | Denso Corporation | Forward & reverse link channels dynamic processing gain |
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| US20040109425A1 (en) * | 2002-12-06 | 2004-06-10 | Scribano Gino A. | Method and apparatus for improving hard handoffs in CDMA systems |
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