Method for realizing real-time transmission of multimedia service in broadband digital cluster group

Abstract

The invention discloses a method for realizing real-time transmission of a multimedia service in a broadband digital cluster group. The method comprises the following steps of: A, transmitting a cluster multimedia service request to a network subsystem by using a service transmitting user terminal, authenticating the service transmitting user terminal by using the network subsystem, establishing an S5 / S8 bearer of a cluster default bearer in a group, and initiating the establishment of a bearer special for a cluster; B, establishing a cluster default bearer of the service transmitting user terminal and a bearer special for the cluster in an uplink; C, establishing a cluster default bearer of a service receiving user terminal and a bearer special for the cluster in a downlink; and D, after the establishment of the cluster bearer, sending a service authorization message to the service transmitting user terminal and transmitting service prompt information to the service receiving user terminal, by using the network subsystem. After the application of the embodiment of the invention, real-time transmission of a high speed multimedia service in the group can be realized.

Description

technical field [0001] The present invention relates to the technical field of trunking communication, and more specifically, relates to a method for realizing real-time transmission of multimedia services in a group in a broadband digital trunking system based on time-division long-term evolution technology. Background technique [0002] Digital trunking communication system refers to a dedicated mobile communication system in which multiple users share a group of wireless channels and use these channels dynamically. It is a command and dispatch communication system. Compared with the public mobile communication system, the main feature of the trunking communication system is that half-duplex communication is performed through a push-to-talk (PTT, Push To Talk) switch, the connection time is short, the channel utilization rate is high, and the group call function is supported. [0003] Due to its unique characteristics of command, dispatch and quick call, the trunking commu...

AI Technical Summary

Problems solved by technology

Existing trunking communication systems include MOTOROLA's iDEN (based on TDMA), European standard TETRA (based on TDMA), domestic GOTA (based on CDMA) and GT800 (based on GSM), etc., due to limitations in bandwidth and data transmission rates, The services provided are limited to group PTT calls and some supplementary low-speed data services, and cannot perform real-time transmission of high-speed multimedia services

[0004] The new generation of broadband wireless access technology Time Division Long Term Evolution (TD-LTE) has the advantages of high bandwidth and low delay, which can ensure the high-speed transmission of multimedia services in the group, and solve the problem that only PTT voice calls can be performed in the trunking communication system for a long time. The problem that real-time transmission of high-speed multimedia services cannot be performed

At present, in the TD-LTE system, there is no method for real-time transmission of multimedia services in the cluster group

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