CN1674706A - Method for realizing call of fast group calling - Google Patents
Method for realizing call of fast group calling Download PDFInfo
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- CN1674706A CN1674706A CN 200410029745 CN200410029745A CN1674706A CN 1674706 A CN1674706 A CN 1674706A CN 200410029745 CN200410029745 CN 200410029745 CN 200410029745 A CN200410029745 A CN 200410029745A CN 1674706 A CN1674706 A CN 1674706A
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Abstract
The present invention discloses a method for implementing group call calling. Said method is characterized by that a speech distribution channel from anchor mobile service switching centre to group call area small zone can be created in advance, and said method also includes the following steps: A. the base station subsystem whose up-traffic channel can receive quick group call request message sent by mobile station can be utilized to create the group call channel from said base station subsystem to anchor mobile service switching centre and said mobile station, and occupy the above-mentioned speech distribution channel; B. said base station subsystem can transfer group call notification message into the group call area small zone of said mobile station; and C. the mobile station in the group call area small zone of said mobile station is transferred to group call channel to make monitoring.
Description
Technical field
The present invention relates to the technology of group calling in the moving communicating field, particularly a kind of method that in based on the trunking communication network of global system for mobile communications (GSM), realizes quick group calling.
Background technology
In order in GSM, to realize group-calling service, the GSM-R system has been proposed, GSM-R is the international standard that a cover of Europe formulation is used for the railway mobile communication, and GSM-R as service bearer, to travelling carriage provides group services such as VGCS business and VBS business by the eMLPP business with the gsm communication technology.
VGCS business among the GSM-R will be implemented in exactly that a plurality of people can talk in the wireless communication system, and more people can monitor; VBS business among the GSM-R will realize 1 people's speech exactly, and the business that a plurality of people monitor also can be with a kind of special case of VBS business as the VGCS business.
The group-calling service that eMLPP business among the GSM-R can provide different stage for the different mobile stations of using VGCS business or VBS business makes different travelling carriages enjoy the different group calling authorities of using VGCS business or VBS business.For example, the eMLPP business can be divided into three grades with the group calling of travelling carriage according to the difference of call set-up time: 1 grade for setting up fast, and group calling settling time is 1～2 second; 2 grades is normal foundation, and group calling settling time was less than 5 seconds; 3 grades are to set up at a slow speed, and group calling settling time was less than 10 seconds.
Wherein, set up fast by among the GSM-R some are called out optional flow process for 1 of the eMLPP business grade among the GSM-R, as: the omission of encryption flow and authorizing procedure or delay, and adopt utmost point early assignment flow process in the stage of assignment immediately, the group calling that can realize is about about 1S～2S settling time, in order to satisfy the demand of general cluster department for quick group-calling service.
As shown in Figure 1, Fig. 1 is the sequential chart of the quick group calling of eMLPP business realizing among the available technology adopting GSM-R, Fig. 2 is the flow chart of corresponding diagram 1, supposes to carry out the travelling carriage of group calling and the travelling carriage in the group call region by same mobile services switching centre (MSC) administration, and its concrete steps are:
Step 200, the quick group-calling service of Mobile Origination of initiating group calling, this travelling carriage reports the allocated channel request to affiliated base station sub-system (BSS);
After step 201, this BSS receive this request, give the up traffic of this travelling carriage assignment (TCH) channel;
Step 202, this travelling carriage report layer three business request information by BSS to MSC on the TCH channel that is distributed, layer three business request information are quick group calling request;
Step 203, MSC determine that this is called out is quick group calling after receiving these layer three service request, then check the record at VLR Visitor Location Register (VLR), judge whether this travelling carriage has the calling authority of quick this group calling of initiation, if having, and execution in step 204; Otherwise, execution in step 211;
Owing to be provided with the initiation group calling authority of all travelling carriages in advance at VLR, inquiry VLR just can obtain the group calling authority of this travelling carriage;
Step 204, the MSC BSS under this travelling carriage sends assignment request message;
Step 205, BSS set up group-calling channel and the group-calling channel from this BSS to MSC from this travelling carriage to this BSS, send assignment to MSC after BSS sets up group-calling channel and finishes and finish message, call service group's sign (group ID) that message is carried this travelling carriage is finished in this assignment;
Step 206, MSC inquire about group call reference and group calling attribute information according to the cell ID (cell ID) of the travelling carriage of group ID that receives and detected initiation group calling to Group Call Register (GCR), thereby determine the scope of group calling;
Step 207, GCR return group call reference and attribute, and group calling is labeled as calls out;
GCR deposits group call reference and group calling attribute, as: the regional extent of group calling just can obtain group call reference and group calling attribute according to group ID and the cell ID that this travelling carriage has;
After step 208, MSC receive the group calling attribute, determine the group calling scope, after the BSS of administration group call region carries out being connected of A interface circuit, send group calling assignment request for the BSS of administration group call region;
After the BSS of step 209, administration group call region receives this request, after cell allocation land circuit resource and Radio Resource in the group call region, send the group calling assignment to MSC and finish message, and send the group calling notification message for the sub-district in group call region;
After the notified message of the travelling carriage of sub-district, go to group-calling channel and monitor in step 210, the group call region;
The foundation of the voice distribution channel for distribution from MSC to the group call region sub-district has been realized in the step 208 of said method～209, promptly set up the A interface circuit from MSC to BSS earlier, set up land circuit resource and Radio Resource again from BSS to the group call region sub-district, this method can realize the call setup of quick group-calling service about 1S～2S, but, when special sectors such as public security, fire-fighting required the hundreds of milliseconds of left and right sides for the call set-up time of quick group-calling service, the calling of the quick group-calling service that the eMLPP business among the GSM-R provides just can not meet the demands.Therefore, realize that in hundreds of milliseconds the call setup of quick group-calling service can only use the special digital group system, for example: integrated wireless strengthens network system (iDEN) and land trunk radio system (TETRA), this special digital group system can provide the quick group-calling service in hundreds of milliseconds, but owing to the reason that adopts iDEN and TETRA technology standard, can only build the mobile grouping private network, the cluster private network exists utilance low, drawbacks such as networking cost and maintenance cost height.
In sum, how to adopt GSM in hundreds of milliseconds, to realize that the call setup of quick group-calling service is a problem demanding prompt solution.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that realizes quick group calling, and this method can realize the foundation of the end-to-end transmission channel of quick group-calling service in hundreds of milliseconds, thereby realizes the calling of quick group-calling service.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
A kind of method that realizes quick group calling is set up the voice distribution channel for distribution from the anchor mobile services switching centre to the group call region sub-district in advance, and this method also comprises:
A, receive that by up traffic channel the base station sub-system of Mobile Originated quick group calling request message sets up this base station sub-system to the anchor mobile services switching centre, with, to the group-calling channel of this travelling carriage, and take the voice distribution channel for distribution of setting up in advance from the anchor mobile services switching centre to the group call region sub-district;
B, this base station sub-system send the group calling notification message for the group call region sub-district of this travelling carriage;
Travelling carriage in the group call region sub-district of C, this travelling carriage goes to group-calling channel and monitors.
Behind step C, this method comprises that further the anchor mobile services switching centre carries out the step of group calling purview certification to this travelling carriage:
The record that the inspection of anchor mobile services switching centre sets in advance at VLR Visitor Location Register, judge by VLR Visitor Location Register whether the travelling carriage of initiating layer three business request information has the calling authority of quick this group calling of initiation, if have, then the travelling carriage in the group call region sub-district continues to monitor at group-calling channel; Otherwise the quick group calling of the travelling carriage of initiating layer three business request information and the voice distribution channel for distribution resource that takies will be discharged by the anchor mobile services switching centre, this quick group calling failure.
Behind step C, this method comprises that further the anchor mobile services switching centre carries out the step that the group calling attribute obtains to this travelling carriage:
The anchor mobile services switching centre obtains the group calling attribute of this travelling carriage from VLR Visitor Location Register, determine the group call region sub-district, judge according to determined group call region sub-district whether shared voice distribution channel for distribution has comprised to the voice distribution channel for distribution of the definite to some extent group call region sub-district of institute, if then the travelling carriage in the group call region sub-district continues to monitor at group-calling channel; Otherwise, then set up and voice distribution channel for distribution that do not have setting in advance from the anchor mobile services switching centre to determined this group call region sub-district.
The process of the group call region sub-district of described this travelling carriage of determining step B is: the group call region sub-district corresponding relation of this travelling carriage and this travelling carriage is set in base station sub-system in advance, and base station sub-system is determined the group call region sub-district of this travelling carriage correspondence according to the corresponding relation that sets in advance.
The described voice distribution channel for distribution of setting up in advance from the anchor mobile services switching centre to the group call region sub-district is from anchor mobile services switching centre group calling voice distributor until the whole transmission channel the wireless channel of group call region sub-district.
The described voice distribution channel for distribution of setting up in advance from the anchor mobile services switching centre to the group call region sub-district is from anchor mobile services switching centre group calling voice distributor until the part transmission channel the wireless channel of group call region sub-district.
Described part transmission channel is to the A interface circuit the base station sub-system of administering the group call region sub-district from anchor mobile services switching centre group calling voice distributor;
Perhaps be the A interface circuit and the land circuit resource of the base station sub-system of administering the group call region sub-district the base station sub-system from anchor mobile services switching centre group calling voice distributor to administration group call region sub-district to the group call region sub-district;
Perhaps be the A interface circuit and the radio-circuit resource of the base station sub-system of administering the group call region sub-district the base station sub-system from anchor mobile services switching centre group calling voice distributor to administration group call region sub-district to the group call region sub-district.
Described steps A further comprises:
Foundation from anchor mobile services switching centre group calling voice distributor until the transmission channel of remainder between the wireless channel of definite group call region sub-district.
The quantity of described distribution channel for distribution equals the quantity of group call region sub-district or less than the quantity of group call region sub-district.
From technique scheme as can be seen, the present invention has set up the voice distribution channel for distribution from anchor MSC to the group call region sub-district in advance, so when carrying out quick group-calling service, promptly be to report quick group-calling channel request to get final product till the voice distribution channel for distribution that takies from anchor MSC to the group call region sub-district from the travelling carriage of initiating quick group calling the settling time of the end-to-end transmission channel of group-calling service fast, this time period does not comprise the time of network side inquiry VLR and GCR and MSC at the needed time of the assignment procedure of each sub-district of group call region, thereby has saved the time of setting up quick group calling.Therefore, this method can realize the foundation of end-to-end transmission channel in hundreds of milliseconds, thereby realizes the calling of quick group-calling service.
Description of drawings
Fig. 1 is the sequential chart of the quick group calling of eMLPP business realizing among the available technology adopting GSM-R.
Fig. 2 is the flow chart of the quick group calling of eMLPP business realizing among the available technology adopting GSM-R.
Fig. 3 realizes the sequential chart of quick group calling for the present invention.
Fig. 4 realizes the flow chart of quick group calling for the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is further elaborated.
Because when in based on the group system of GSM, carrying out quick group-calling service, finish travelling carriage group calling authority and obtaining of group calling attribute needs the time, the voice distribution channel for distribution of setting up from anchor MSC to the group call region sub-district needs the time.Anchor MSC of the present invention is for initiating the affiliated MSC of quick group calling travelling carriage.In order to save the aforesaid operations time, accelerate the settling time of group calling, then in advance the voice distribution channel for distribution from anchor MSC to the group call region sub-district is set up on the one hand, described group call region sub-district is each sub-district in the group call region, travelling carriage can be initiated quick group calling in these sub-districts, take voice distribution channel for distribution by the MSC under it from the anchor MSC of this travelling carriage to the group call region sub-district, this travelling carriage is directly inserted set up good voice distribution channel for distribution in advance, finish the foundation of whole quick group calling from anchor MSC to the group call region sub-district; The travelling carriage of initiating quick group-calling service is not carried out obtaining of group calling authority and group calling attribute on the other hand.
Figure 3 shows that the present invention realizes the sequential chart of quick group calling, Fig. 4 is the flow chart corresponding with Fig. 3, suppose to carry out the travelling carriage of group calling and the travelling carriage in the group call region by same mobile services switching centre (MSC) administration, promptly all by anchor MSC administration, its concrete steps are:
Step 400, the quick group-calling service of Mobile Origination of initiating group calling, this travelling carriage reports quick group-calling channel request message to affiliated base station sub-system (BSS);
After step 401, this BSS receive this quick group-calling channel request message, give this travelling carriage assignment TCH channel immediately;
Step 402, this travelling carriage report layer three business request information to BSS on the TCH channel that is distributed, layer three business request information are quick group calling request;
Step 403, BSS receive and judge this request message behind this request message is quick group calling request, takies to set up the good voice distribution channel for distribution from anchor MSC to the group call region sub-district in advance;
Step 404, BSS set up group-calling channel and the group-calling channel from this BSS to anchor MSC from this travelling carriage to this BSS, and send the group calling notification message for the group call region sub-district, monitor so that the travelling carriage in the sub-district of group call region goes on the group-calling channel that pre-sets;
The present invention can be provided with the travelling carriage of the quick group calling of initiation and the corresponding relation of group call region sub-district in advance on BSS, thereby BSS can determine the group call region sub-district of the travelling carriage correspondence of the quick group calling of initiation according to predefined corresponding relation, thereby sends the group calling notification message for the group call region sub-district;
Travelling carriage in step 405, the group call region sub-district goes to group-calling channel and monitors.
Because the present invention is in the operating process of quick group-calling service, saved the travelling carriage of setting up voice distribution channel for distribution and initiating quick group-calling service and carried out the acquisition time of group calling authority and group calling attribute, thereby saved operating time at quick group-calling service from anchor MSC to the group call region sub-district.
The travelling carriage of the present invention in the group call region sub-district goes to after group-calling channel monitors, can also carry out obtaining of purview certification and group calling attribute to the travelling carriage of initiating quick group calling request again, the process of the travelling carriage of initiating quick group calling request being carried out purview certification is:
Anchor MSC checks the record at VLR, judges whether this travelling carriage has the calling authority of quick this group calling of initiation, if having, the travelling carriage in the group call region sub-district continues to monitor at group-calling channel; Otherwise the quick group calling of this travelling carriage will be discharged by anchor MSC, this quick group calling failure.
The acquisition process that the travelling carriage of initiating quick group calling request is carried out the group calling attribute is:
Anchor MSC inquires about the group calling attribute information according to group ID that initiates quick group calling travelling carriage and cell ID to GCR; GCR returns the group calling attribute, and group calling is labeled as calls out; Anchor MSC receives the group calling attribute.
Owing to comprise the group call region cell list of this travelling carriage in the group calling attribute, so the present invention can make anchor MSC determine the sub-district of group call region by the group call region cell list of this travelling carriage of GCR storage, whether thereby process decision chart 4 shared to set up the good voice distribution channel for distribution from anchor MSC to the group call region sub-district in advance be voice distribution channel for distribution to the definite to some extent group call region sub-district of institute if being, if then the travelling carriage in the group call region sub-district continues to monitor at group-calling channel; Otherwise, then can be according to the described step 208 of Fig. 2～voice distribution channel for distribution of step 209 foundation from anchor MSC to the determined group call region sub-district that does not take.
The voice distribution channel for distribution from anchor MSC to the group call region sub-district that the present invention sets up in advance comprises: the radio-circuit resource of the BSS of the A interface circuit the BSS from anchor MSC to administration group call region sub-district, administration group call region sub-district to the BSS of the land circuit resource of group call region sub-district and administration group call region sub-district to the group call region sub-district.When the voice distribution channel for distribution set up in advance from anchor MSC to the group call region sub-district, can be from anchor MSC group calling voice distributor until the whole transmission channel between the wireless channel of group call region sub-district, also can for from anchor MSC group calling voice distributor until the local channel between the wireless channel of group call region sub-district, as: only set up the A interface circuit the BSS from anchor MSC group calling voice distributor to administration group call region sub-district; Perhaps set up the A interface circuit the BSS from anchor MSC group calling voice distributor to administration group call region sub-district and administer the land circuit resource of the BSS of group call region sub-district to the group call region sub-district; Perhaps set up A interface circuit and BSS that administers the group call region sub-district and the radio-circuit resource of the BSS that administers the group call region sub-district the BSS from anchor MSC group calling voice distributor to administration group call region sub-district to the group call region sub-district.
During voice distribution channel for distribution that the present invention sets up in advance, voice distribution channel for distribution can be, also voice distribution channel for distribution can be from anchor MSC to part group call region sub-district from anchor MSC to all group call region sub-districts from anchor MSC to the group call region sub-district.When being voice distribution channel for distribution from anchor MSC to part group call region sub-district, the passage from anchor MSC to remainder group call region sub-district just need carry out having set up after the obtaining of group calling attribute to the travelling carriage of initiating quick group calling request.
Explanation the present invention below gives one example: suppose when the voice distribution channel for distribution of setting up in advance from anchor MSC to the group call region sub-district, only set up the A interface circuit the BSS from anchor MSC to administration group call region sub-district in advance, i.e. transmission channel the BSS from anchor MSC to administration group call region sub-district, should default transmission channel can temporarily not belong to any group calling, when quick group calling is initiated, anchor MSC takies the transmission channel the BSS from anchor MSC to the determined group call region of administration sub-district that sets in advance, and then set up from the BSS that administers determined group call region sub-district to the land circuit resource of the group call region sub-district of determining and the group-calling channel of group call region sub-district, finish the foundation of whole transmission channel.
Because the present invention has set up the voice distribution channel for distribution from anchor MSC to the group call region sub-district in advance, so when carrying out quick group-calling service, only need finish from the travelling carriage of initiating quick group calling reports quick group-calling channel to get final product till the voice distribution channel for distribution that takies from anchor MSC to the group call region sub-district, and do not need to set up again voice distribution channel for distribution from anchor MSC to the group call region sub-district, thereby saved the time of setting up quick group calling, through check, whole quick group calling is about about 400～600 milliseconds settling time.
The above only is specific embodiments of the invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1, a kind of method that realizes quick group calling is characterized in that, sets up the voice distribution channel for distribution from the anchor mobile services switching centre to the group call region sub-district in advance, and this method also comprises:
A, receive that by up traffic channel the base station sub-system of Mobile Originated quick group calling request message sets up this base station sub-system to the anchor mobile services switching centre, with, to the group-calling channel of this travelling carriage, and take the voice distribution channel for distribution of setting up in advance from the anchor mobile services switching centre to the group call region sub-district;
B, this base station sub-system send the group calling notification message for the group call region sub-district of this travelling carriage;
Travelling carriage in the group call region sub-district of C, this travelling carriage goes to group-calling channel and monitors.
2, the method for claim 1 is characterized in that, behind step C, this method comprises that further the anchor mobile services switching centre carries out the step of group calling purview certification to this travelling carriage:
The record that the inspection of anchor mobile services switching centre sets in advance at VLR Visitor Location Register, judge by VLR Visitor Location Register whether the travelling carriage of initiating layer three business request information has the calling authority of quick this group calling of initiation, if have, then the travelling carriage in the group call region sub-district continues to monitor at group-calling channel; Otherwise the quick group calling of the travelling carriage of initiating layer three business request information and the voice distribution channel for distribution resource that takies will be discharged by the anchor mobile services switching centre, this quick group calling failure.
3, the method for claim 1 is characterized in that, behind step C, this method comprises that further the anchor mobile services switching centre carries out the step that the group calling attribute obtains to this travelling carriage:
The anchor mobile services switching centre obtains the group calling attribute of this travelling carriage from VLR Visitor Location Register, determine the group call region sub-district, judge according to determined group call region sub-district whether shared voice distribution channel for distribution has comprised to the voice distribution channel for distribution of the definite to some extent group call region sub-district of institute, if then the travelling carriage in the group call region sub-district continues to monitor at group-calling channel; Otherwise, then set up and voice distribution channel for distribution that do not have setting in advance from the anchor mobile services switching centre to determined this group call region sub-district.
4, the method for claim 1, it is characterized in that, the process of the group call region sub-district of described this travelling carriage of determining step B is: the group call region sub-district corresponding relation of this travelling carriage and this travelling carriage is set in base station sub-system in advance, and base station sub-system is determined the group call region sub-district of this travelling carriage correspondence according to the corresponding relation that sets in advance.
5, the method for claim 1, it is characterized in that the described voice distribution channel for distribution of setting up in advance from the anchor mobile services switching centre to the group call region sub-district is from anchor mobile services switching centre group calling voice distributor until the whole transmission channel the wireless channel of group call region sub-district.
6, the method for claim 1, it is characterized in that the described voice distribution channel for distribution of setting up in advance from the anchor mobile services switching centre to the group call region sub-district is from anchor mobile services switching centre group calling voice distributor until the part transmission channel the wireless channel of group call region sub-district.
7, method as claimed in claim 6 is characterized in that, described part transmission channel is to the A interface circuit the base station sub-system of administering the group call region sub-district from anchor mobile services switching centre group calling voice distributor;
Perhaps be the A interface circuit and the land circuit resource of the base station sub-system of administering the group call region sub-district the base station sub-system from anchor mobile services switching centre group calling voice distributor to administration group call region sub-district to the group call region sub-district;
Perhaps be the A interface circuit and the radio-circuit resource of the base station sub-system of administering the group call region sub-district the base station sub-system from anchor mobile services switching centre group calling voice distributor to administration group call region sub-district to the group call region sub-district.
8, method as claimed in claim 6 is characterized in that, described steps A further comprises:
Foundation from anchor mobile services switching centre group calling voice distributor until the transmission channel of remainder between the wireless channel of definite group call region sub-district.
9, the method for claim 1 is characterized in that, the quantity of described distribution channel for distribution equals the quantity of group call region sub-district or less than the quantity of group call region sub-district.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100297457A CN100456874C (en) | 2004-03-24 | 2004-03-24 | Method for realizing call of fast group calling |
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| CNB2004100297457A CN100456874C (en) | 2004-03-24 | 2004-03-24 | Method for realizing call of fast group calling |
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| CN1674706A true CN1674706A (en) | 2005-09-28 |
| CN100456874C CN100456874C (en) | 2009-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100297457A Expired - Fee Related CN100456874C (en) | 2004-03-24 | 2004-03-24 | Method for realizing call of fast group calling |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007056926A1 (en) * | 2005-11-16 | 2007-05-24 | Huawei Technologies Co., Ltd. | Method and system for implementing group call service |
| WO2007082441A1 (en) * | 2006-01-21 | 2007-07-26 | Huawei Technologies Co., Ltd. | A method and system for realizing urgency call during the course of group call |
| CN100389617C (en) * | 2006-03-14 | 2008-05-21 | 华为技术有限公司 | System and method for realizing support cluster service |
| CN100403849C (en) * | 2006-01-26 | 2008-07-16 | 华为技术有限公司 | Group cal communication system and its method |
| 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 |
| CN101132563B (en) * | 2007-09-21 | 2010-06-09 | 中兴通讯股份有限公司 | Method for implementing called terminal fast listening in digital aggregated communication system |
| WO2010111843A1 (en) * | 2009-04-03 | 2010-10-07 | 华为技术有限公司 | Method, system and mobile switch center for legal listening |
| CN101309506B (en) * | 2007-05-14 | 2011-12-07 | 华为技术有限公司 | Call control method, mobile switching center and communication system |
| CN102137337B (en) * | 2010-01-27 | 2013-09-25 | 普天信息技术研究院有限公司 | Method for quickly setting up group calling in digital trunking communication system |
| CN106211362A (en) * | 2016-08-23 | 2016-12-07 | 海能达通信股份有限公司 | Cluster session method, device, terminal unit and network equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6219548B1 (en) * | 1998-12-22 | 2001-04-17 | Ericsson Inc | Support for transfer of neighboring cell information between MSC areas for VGCS/VBS calls |
| US6308079B1 (en) * | 2000-03-24 | 2001-10-23 | Motorola, Inc. | Method and apparatus for a talkgroup call in a wireless communication system |
| US6944137B1 (en) * | 2000-03-24 | 2005-09-13 | Motorola, Inc. | Method and apparatus for a talkgroup call in a wireless communication system |
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2004
- 2004-03-24 CN CNB2004100297457A patent/CN100456874C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007056926A1 (en) * | 2005-11-16 | 2007-05-24 | Huawei Technologies Co., Ltd. | Method and system for implementing group call service |
| WO2007082441A1 (en) * | 2006-01-21 | 2007-07-26 | Huawei Technologies Co., Ltd. | A method and system for realizing urgency call during the course of group call |
| CN100403849C (en) * | 2006-01-26 | 2008-07-16 | 华为技术有限公司 | Group cal communication system and its method |
| CN100389617C (en) * | 2006-03-14 | 2008-05-21 | 华为技术有限公司 | System and method for realizing support cluster service |
| 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 |
| CN101309506B (en) * | 2007-05-14 | 2011-12-07 | 华为技术有限公司 | Call control method, mobile switching center and communication system |
| CN101132563B (en) * | 2007-09-21 | 2010-06-09 | 中兴通讯股份有限公司 | Method for implementing called terminal fast listening in digital aggregated communication system |
| WO2010111843A1 (en) * | 2009-04-03 | 2010-10-07 | 华为技术有限公司 | Method, system and mobile switch center for legal listening |
| CN102137337B (en) * | 2010-01-27 | 2013-09-25 | 普天信息技术研究院有限公司 | Method for quickly setting up group calling in digital trunking communication system |
| CN106211362A (en) * | 2016-08-23 | 2016-12-07 | 海能达通信股份有限公司 | Cluster session method, device, terminal unit and network equipment |
| CN106211362B (en) * | 2016-08-23 | 2020-02-28 | 海能达通信股份有限公司 | Cluster session method and device, terminal equipment and network side equipment |
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| Publication number | Publication date |
|---|---|
| CN100456874C (en) | 2009-01-28 |
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