A method of realizing that automatic clawback addition group is exhaledTechnical field
The present invention relates to a kind of methods realized automatic clawback addition group and exhaled, and belong to special communication technology for railway field.
Background technology
Railway is as popular transport facility, when the major disaster accident to happen suddenly to it carries out rescue,It is necessary to ensure that the unimpeded of communication.Therefore, reliable, efficient command dispatching system is built to be of great significance.In railway transportation systemIn system, command scheduling is usually realized by group-calling service (hereinafter referred to as group is exhaled).LTE-R is logical for railway next generation's broadband mobileLetter system, including voice group call service, Voice Broadcast Service, temporary group calling, reconnection group such as exhale at the group call services.
Currently, the railway specialized mobile radio based on LTE-R carries out group when exhaling, usually it is accomplished by the following way：It is mobileTerminal identity is to POC (Push-to-talk over Cellular, public cellular network on realize push-to-talk service) serverRequest carries the attribute informations such as GCN (group wails code), CT (type of call) when request.POC server exhales initiation to ask according to groupThe attribute information and requester position code that user carries calculate SA (service area), and generate calling ginseng by CT+SA+GCNIt examines.The Subscriber Number for the class of call and the interior called mobile terminal of group that POC server is exhaled by call reference lookup group.POCServer is called for asking to all called subscriber's hair groups, and the information such as class of call, GCN, CT and SA are carried in call information.IfMobile terminal is currently at idle state, then is automatically added to group after receiving group calling request and exhales；If mobile terminal isCall is then this calling of refusal according to class of call judgement or seizes previous calls.
However above-mentioned group exhales mode, has certain limitation for current mobile terminal：First, a shiftingDynamic terminal can only participate in a group calling.It, can only be according to group calling priority when mobile terminal receives multiple groups simultaneously to be called for askingTo judge which group calling needs priority processing.And mobile terminal, currently in some group is exhaled, the high group of priority, which is exhaled, also canThe low group of automatic forced preempting priority is exhaled.Secondly, after current group is exhaled, being exhaled with other relevant groups of mobile terminal may be alsoIn the presence of.And mobile terminal can not continue to participate in during relevant group exhales.For railway traffic control system, mobile terminal withoutMethod know with oneself relevant group-calling service, certain important instructions or information may be missed, trigger certain risk.
Invention content
In view of the deficiencies of the prior art, technical problem to be solved by the present invention lies in a kind of automatic clawbacks of realization of offer to addEnter the method that group is exhaled.
For achieving the above object, the present invention uses following technical solutions：
A method of realizing that automatic clawback addition group is exhaled.Include the following steps：
Mobile terminal will fail the call information that participation group is exhaled and preserve to group to exhale in list；
When the free time, the described group of call information for exhaling list is obtained, and exhale from trend server clawback request addition group.
Wherein more preferably, when the mobile terminal reception group is called for asking, the high group of priority processing class of call is exhaled, and will notIt can participate in the call information that group is exhaled and preserve to described group to exhale in list.
Wherein more preferably, the call information includes class of call and call reference number；
The mobile terminal obtains described group according to the class of call and the group that class of call is high in list is exhaled to exhale, and according toThe described group of call reference number exhaled is to the server clawback.
Wherein more preferably, it when the call list is exhaled comprising identical group of multiple class of calls, chooses wherein any oneA carry out clawback.
Wherein more preferably, it is present in the server if the group of clawback is exhaled, waits for that the mobile terminal is added described group and exhales,And it is exhaled at described group and deletes the described group of call information exhaled in list；
If the group of clawback, which is exhaled, is not present in the server, the mobile terminal receives the refuse information of the server,And it is exhaled at described group and deletes the described group of call information exhaled in list.
Wherein more preferably, at the end of the group exhaled in list when described group is exhaled, the server is exhaled to having neither part nor lot in described groupMobile terminal transmitting group calling release notice；
The mobile terminal receives described group and release is exhaled to notify, and exhales corresponding call information in list to delete by described groupIt removes.
The present invention solve mobile terminal exit current group exhale after, the problem of can not knowing to oneself related group-calling service.The method provided through the invention exhales even if mobile terminal cannot participate in all relative groups, but exits current group and exhaleAfter can be by automatic clawback mode, and currently group related and highest priority to oneself is added and exhales.The present invention effectively avoidsThe security risk that causes because missing instruction or information, has the safety for being easy to railway transport field, while also improving movementThe working efficiency of terminal user.
Description of the drawings
Fig. 1 is the processing procedure that mobile terminal reception group is exhaled in the present invention.
Specific implementation mode
The technology contents of the present invention are described in detail in the following with reference to the drawings and specific embodiments.
The method provided by the present invention for realizing that automatic clawback addition group is exhaled exhales list by setting group, can will fail andWhen the call information addition group exhaled of participation group exhale in list.After mobile terminal completes active calls, exhales in list and obtain from groupHigher group of class of call is exhaled.Further according to call information from trend POC server clawback, sends addition group and call for asking, continue to joinWith with oneself other relevant group-calling service.In the present invention, one configuration group of each mobile terminal exhales list.The group exhales listIt is related to mobile terminal and without participation group is exhaled in time call information for storing.Including class of call, call referenceThe information such as number.The specific implementation process of the present invention is described below.
First, it introduces mobile terminal and handles the multiple groups of processes for calling for asking.
There are multiple groups when the mobile terminal free time when calling for asking, the higher calling of priority level is selected according to class of callProcessing.And when mobile terminal is in during group exhales, and there are other groups to call for asking, need to judge to exhale for current group to exhale with other groupsClass of call, decision exits active calls and is also to continue with active calls, and specific deterministic process may refer to Fig. 1.
Whether mobile terminal has new group to exhale B request additions, judge current in group exhales A：If needing judgement groupA and group is exhaled to exhale the class of call of B；If not in group exhales A, it is added to group and exhales B.When mobile terminal judgement group exhales exhaling for A and BWhen being rank, if group exhales the group that is superior to of B to exhale A, exits group and exhale A and exhale the call information of A to be added to group group and exhaleIn list, while being added to group and exhaling B.After group exhales B, mobile terminal can then continue to participate in group and exhale A.If group exhales B'sFor class of call not higher than the class of call of calling A, then refusal group exhales B, and exhales the call information of B to be saved in group group and exhale listIn.Wait for current group exhale A after, continue to participate in group and exhale B.When calling for asking addition for multiple groups, then repeat above-mentioned to judgeJourney, the multiple groups of callings exhaled for failing to participate in time, which are preserved to group, exhales in list.
Secondly, the disposition that mobile terminal exhales group call information in list is introduced.
When mobile terminal in exhale for current group when, group exhales a certain group in list to exhale and may discharge.
Group, which exhales to save in list, fails to participate in all groups of call informations exhaled.It exhales and has discharged when wherein a certain groupWhen, mobile terminal is without exhaling continuing to participate in respective sets.In order to avoid subsequent movement terminal continuation clawback, the group is exhaled, then is existedDuring group exhales release, respective call information is deleted by POC server proactive notification mobile terminal.Initiation group in POC serverAfter exhaling, automatically detects and fail to participate in the mobile terminal that the group is exhaled.Group exhales object then to have recorded the information of corresponding mobile terminal.WhenPOC server terminates a certain group when exhaling, and acquisition group exhales the user number information of the mobile terminal of object record, and is moved to correspondingDynamic terminal transmission group exhales release to notify.After mobile terminal reception POC server group exhales release to notify, the calling letter that the group is exhaled is judgedWhether breath, which is stored in group, is exhaled in list.If directly deleting this call information；It is this time discharged if it is not, ignoringNotice.
After mobile terminal, which terminates current group, exhales, then exhales the call information of list records to continue to participate according to group and fail in timeThe group of processing is exhaled.
Mobile terminal is exhaled from group finds out highest group of call reference number exhaled, and exhaled according to group of class of call in listTo POC server clawback, sends and call request is added.And when being exhaled for identical group of class of call, mobile terminal can be arbitraryOne of group is selected to exhale clawback and be added.If the group of mobile terminal clawback is exhaled not already present in POC server, POCServer can send the feedback message that refusal is added to mobile terminal.Mobile terminal receives refusal feedback message, and by clawback groupThe call information exhaled, which is exhaled from group in list, to be deleted, and processing group exhales other groups in list to exhale again.It is still deposited if the group of clawback is exhaledIt is in POC server, POC server sends the message for receiving addition group and exhaling to terminal.After standby communication terminal is added, by the groupThe call information exhaled, which is exhaled from group in list, to be deleted.After mobile terminal has handled certain call information that group is exhaled in list, no matter groupExhale success or not that can all be automatically deleted this information.
In conclusion the present invention solve mobile terminal exit current group exhale after, can not know and exhale industry with oneself relevant groupThe problem of business.Exhaled even if mobile terminal cannot participate in all relative groups, but exit current group exhale after can be by automaticClawback mode, and currently group related and highest priority to oneself is added and exhales.Therefore present invention effectively prevents because missing certainA little groups exhale the security risk of initiation, have the safety for being easy to railway transport field, while also improving the work of mobile terminal userMake efficiency.
The method provided by the present invention for realizing that automatic clawback addition group is exhaled is described in detail above.To abilityFor the those skilled in the art in domain, any obviously change to what it was done under the premise of without departing substantially from true spiritIt is dynamic, it will all constitute to infringement of patent right of the present invention, corresponding legal liabilities will be undertaken.