Method for determining and regulating group calling region information

Abstract

The invention discloses a method for determining and regulating group calling region information. The method is applied to a broad band digital trunking communication system based on a time division long term evolution (TD-LTE) technology. The method comprises the following steps that: a group user starts up to execute an attachment process so as to report position information of the group user to an enhanced mobile management entity (eMME); the eMME transmits the received position information to an enhanced home subscriber server (eHSS); the eHSS stores the received position information and forms the group calling region information of the group by using the position information of all the group users belonging to the same group; and the eMME determines that the position information of the group user is changed and informs the eHSS of updating the stored group calling region information. By the method, the group users in various states can be guaranteed to be added into the group calling.

Description

technical field [0001] The invention relates to the technical field of group call services, in particular to a method for determining and adjusting group call area information. Background technique [0002] Group call service is a call service that allows group users to set up calls to a group of users in a given area and a certain group ID. Wherein, the group ID is used to identify different groups, and a given area is usually called a group call area, which includes a cluster of cells and is used to limit the call range of the group call. [0003] The system pre-saves the correspondence between the group ID and the group call area information, and the group call area information usually includes the identification of each cell in the group call area and the identification of the base station to which each cell belongs. When a group user initiates a group call, the system finds the corresponding group call area information according to the group ID corresponding to the gro...

AI Technical Summary

Problems solved by technology

[0009] This method solves the problems of wasting system resources and affecting user experience mentioned above, and has strong real-time and flexibility, but it also brings new problems: for example, based on time-division long-term evolution (TD- In the broadband digital trunking communication system of LTE (Time Division-Long Term Evolution) technology, for group users in the connected state, when their location information changes, they will actively report to the system, and for group users in the idle state , when it moves between cells, that is, when the location information changes, it usually does not report actively. Only when the periodic update timer times out, the location update process will be initiated and the current location information will be reported.

That is to say, it is possible that the location information of the group user has changed, but the system does not know it because it has not been reported. In this way, if the location information of the group user has changed, but the location update process has not yet been initiated (Periodic update timer expires), if a group of users initiates a group call, the system will allocate downlink shared wireless resources for each cell according to the group call area information saved by itself. In this way, the idle group The cell where the user is currently located may not have allocated downlink shared wireless resources, resulting in the idle group user being unable to receive the broadcast group call notification message, and thus unable to join the group call

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