Method, terminal and system for point-to-multipoint calling in cluster system based on long term evolution (LTE) technology

Abstract

The invention relates to a method, a terminal and a system for point-to-multipoint calling in a cluster system based on a long term evolution (LTE) technology. The method comprises the following steps of: establishing a communication channel between a source terminal and a target terminal through a base station, a core network, an internet protocol (IP) multimedia subsystem (IMS) domain and an application server; and transmitting voice data between the source terminal and the target terminal through the communication channel, a broadcast multicast service center (BM-SC) and a multimedia broadcast multicast service gateway (MBMS-GW). By the method, a point-to-multipoint cluster communication mechanism is finished by maintaining the conventional air interface protocol to the greatest extent or performing function expansion to the minimum extent on the basis of the conventional air interface protocol; an IP multimedia subsystem +PTT over cellular (IMS+PoC) framework is utilized, and parts of network elements in the conventional network framework are subjected to the function expansion, so that the communication channel between the source terminal and the target terminal is established specifically by the base station, the core network, the IMS domain and the application server; and the voice data is transmitted between the source terminal and the target terminal by the communication channel and the BM-SC, so that point-to-multipoint service of the cluster system in an LTE network is realized, and the compatibility and the fusion between the cluster system and the conventional LTE network are facilitated.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a point-to-multipoint call method, terminal and system in a trunking system based on LTE (Long Term Evolution, long-term evolution) technology. Background technique [0002] At present, the trunking communication system is a dedicated wireless communication system developed to meet the command and dispatch needs of industry users and is oriented to specific industry applications. A large number of wireless users in the system share a small number of wireless channels, and the main application is command and dispatch. It is a multi-purpose, High performance wireless communication system. The trunking communication system has a wide range of application markets in the fields of government departments, public safety, emergency communications, electric power, civil aviation, petrochemical and military. [0003] The trunking communication system has experienced a devel...

AI Technical Summary

Problems solved by technology

In addition, in terms of spectrum utilization and coverage, the existing digital trunking system cannot well meet the needs

[0005] At present, the broadband digital trunking system based on LTE technology has become the development direction of the next-generation trunking system. The standards for the network architecture, business process, business

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