A temporary group call method in LTE digital trunking system

Abstract

The invention discloses a temporary group call method in an LTE digital trunk system. The method comprises that a dispatching desk sets up a temporary group; an LTE core network is informed of setting up the temporary group through a dispatcher; a TGM (Trunk Group Management) unit sends temporary group setup instructions to all TUMs; all the TUMs store received information in subscription information contexts of local UE and push the temporary group information to online users in Max-UE users; the TGM receives the eNB or TA position information of all online users in the temporary group, fed back by all the TUMs, and sends PTT initial context setup requests to eNBs, wherein the information of the temporary group and Max-Grp subscribed static groups is carried by the PTT initial context setup requests; each eNB sets up user planes of the temporary group and sends temporary group setup paging at air interfaces, wherein the information of the temporary group and the Max-Grp subscribed static groups and the lifetime information of the temporary group are carried by the temporary group setup paging. Through the application of the method, the group call efficiency can be improved, and the cost is reduced.

Description

technical field [0001] The present application relates to trunking communication technology, in particular to a temporary group call method and system in an LTE digital trunking system. Background technique [0002] In the trunking communication, the temporary group call class can temporarily create a group for multiple users, and only this call is valid. After the call ends, the UE and each network element automatically delete the temporary group call configuration. The temporary group may include UEs and other existing groups. [0003] In the narrowband cluster TETRA system, its air interface standard supports the temporary group function. However, TETRA does not disclose the wired-side interface, and so far there is no undisclosed TETRA temporary group call process. [0004] In the LTE digital trunking system, there is currently no implementation scheme for temporary group calls. [0005] Currently, the only way to notify UEs in the group of the temporary group is offl...

AI Technical Summary

Problems solved by technology

While the temporary group is being established, it is notified in real time that the temporary group contains UEs and member groups, realizing complex

Existing TETRA or system architecture is difficult to support

In the current narrowband trunking system, the bandwidth is narrow and the temporary group is notified to include UE and member group at the same time. The signaling overhead is large and difficult to support.

It can be seen from the above that the current temporary group call method is expensive and inefficient

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