A method for answering a group call when a called UE cell is reselected for a group call

Abstract

The invention discloses a method for answering group call during group call called UE cell reselection. The method includes the following steps that: after called UE in an IDLE state in group call is reselected from an old cell to a new cell, wherein the old cell and the new cell belong to a same UE tracking area list, when the new cell and the old cell are located in a same eNodeB and group call configurations of cells relating to the group call in the eNodeB are identical, the UE answers the group call in the new cell through the group call configuration of the old cell; and when the new cell and the old cell are located in the same eNodeB and the group calling configurations of the cells relating to the group call in the eNodeB are different, or the new cell and the old cell are located in different eNodeBs, the UE initiates random access to allow the UE to use the group call configuration of the new cell to answer the group call. According to the method, changes of the group call configurations of the new cell and the old cell can be considered after cluster group call called UE cell reselection, the UE triggers the eNodeB to issue group call resource allocation of the new cell through a roam access process, so that the UE can quickly answer the group call in the new cell, the break period of services can be reduced, and the occupation of idle resources can be reduced.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a method for answering a group call when a called UE cell is reselected. Background technique [0002] Some existing broadband trunking systems, especially when the service area is not fixed and the group terminals have greater mobility (such as government affairs network and police network), usually need to dynamically determine the service area according to the actual distribution of user terminals. And only allocate downlink shared wireless resources in the cells included in the service area to save air interface resources. The determination of the group service area is generally composed of EPC (Evolved Packet Core, evolved packet core network) according to the collection of TA List (Tracking Area List, tracking area list) to which all members in a group belong. When the group service is established, the EPC notifies the relevant eNodeB (base station) to establish a group c...

AI Technical Summary

Problems solved by technology

Although this solution can quickly answer group calls after cell reselection by UEs in IDLE state, it involves many network elements, and new messages need to be defined on both the NAS interface and the S1 interface; and it does not distinguish the group call configuration changes of old and new cells. Certain air interface resources

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