Group call service restoration method used for broadband trunking communication system

Abstract

The invention discloses a group call service restoration method used for a broadband trunking communication system, which comprises the following steps. Firstly, a scheduling control center transmits a downlink data packet of a group call to an xGW (Extendable Gateway. Secondly, when the xGW cannot match a group call context corresponding to the downlink data packet in group call contexts being maintained currently, the scheduling control center is informed of abnormity of the group call in the xGW. Thirdly, the scheduling control center transmits a group call restoration message to a mobile management entity (MME) according to the notice. And lastly, the MME executes a reconstruction process of the group call in a core network based on the group call restoration message. With the adoption of the method, a group call service can be quickly restored when errors of the group call context being maintained by the xGW occur..

Description

technical field [0001] The invention relates to trunking communication technology, in particular to a group call service restoration method of a broadband trunking communication system. Background technique [0002] The trunking communication system is developed to meet the command and dispatch needs of industry users, and is a dedicated wireless communication system for specific industry applications. The trunking communication system has a wide range of application markets in government departments, public safety, emergency communications, electric power, civil aviation, petroleum, ports and other fields. [0003] The broadband trunking communication system based on TD-LTE technology takes TD-LTE as the core technology, and integrates the high speed and large bandwidth of TD-LTE with the characteristics of resource sharing, fast call establishment, and command and dispatch in digital trunking technology. A communication system capable of providing high-speed data transmis...

AI Technical Summary

Problems solved by technology

In practical applications, abnormalities will also occur inside the EPC. For example, during the group call process, the xGW responsible for the downlink data processing of the group call is internally abnormal, resulting in an error in the maintenance of the group call context.

When receiving the downlink group call data sent by the dispatching control center, the xGW failed to search for the group context, and could not forward the downlink data route to the corresponding base station, resulting in the called user being unable to receive the data packet normally

Since the dispatch control center cannot perceive the above-mentioned abnormality inside the EPC, the group call service data cannot be transmitted to the called user at this time, and the group call service cannot be restored to normal later, which seriously affects user perception

[0007] It can be seen that when the xGW responsible for group call downlink data processing in the EPC maintains an error in the group call context, the existing broadband trunking communication system cannot quickly recover the group call service

Images