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

Abstract

A method, terminal and system for point-to-multipoint call in a trunking system based on Long Term Evolution (LTE) technology are disclosed by the present invention, wherein a call channel between a source terminal and a destination terminal is established through a base station, core network, IP Multimedia Subsystem (IMS) domain and an application server, and voice data are transferred between the source terminal and the destination terminal through the call channel, a Broadcast Multicast Service Center (BM-SC) and a Multimedia Broadcast Multicast Services Gateway (MBMS-GW). The present invention completes the point-to-multipoint trunking communication mechanism by trying not to change or extending the function as least as possible on the basis of the prior air interface protocol, uses architecture with IMS and PTT Over Cellular (PoC), and performs function extension to partial network elements in the prior network architecture. Specifically, the call channel between the source terminal and the destination terminal is established through the base station, core network, IMS domain and application server, and the voice data are transferred between the source terminal and the destination terminal through the call channel and BM-SC, thus realizing the point-to-multipoint service of the trunking system in an LTE network, and being more beneficial to the compatibility and convergence between the trunking system and the prior LTE network.

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 functions and key technologies of the broadband digital trunking system based on LTE technology have not yet been formulated, and the existing The evolution of the second-generation trunking system to the broadband digital trunking system based on LTE technology has great difficulties, and it does not have or poor compatibility with the LTE network

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