Digital cluster communication system based on long term evolution technology as well as base station and terminal

Abstract

The invention provides a digital cluster communication system based on a long term evolution (LTE) technology as well as a base station and a cluster user terminal; by adding a new cluster signaling radio bearer in the digital cluster communication system based on the LTE technology, such as a T-SRB0 capable of periodically and repeatedly sending a cluster group calling establishing message, a T-SRB1 used for sending a cluster group calling releasing message and the like, the cluster user terminal can access into the digital cluster communication system based on the LTE technology in delay.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a digital trunking communication system based on long-term evolution technology, a base station and a trunking user terminal. Background technique [0002] Due to its unique characteristics of dispatching, group calling and fast calling, the digital trunking communication system has played a huge role in the field of professional communication. Since the mid-1990s, the digital trunking communication system has emerged worldwide and has been widely accepted. application, and achieved good economic and social benefits. Existing digital trunking communication systems mainly include: TETRA (Terrestrial Trunked Radio) system, integrated digital enhanced network (iDEN, Integrated Digital Enhanced Networks) system, open trunking architecture (GoTa, Global Open Trunking Architecture) system And GT800 system etc. [0003] The trunking service is the most basic service provided ...

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Problems solved by technology

[0005] However, the above-mentioned digital trunking communication system based on LTE technology also has certain problems: an important feature of the traditional digital trunking communication system is that it will consider the late access of the trunking user terminal. The so-called late access refers to the During the establishment of trunking services, since there are many trunking user terminals being called, it is difficult to ensure that all trunking user terminals can be accessed at one time for each call. For the connected cluster user terminal, the system can call again after a period of time, that is, delay the access time, and repeat the process until the cluster service is released, so as to ensure that each cluster user terminal can access the cluster service in time Zhonglai; but the existing digital trunking communication system based on LTE technology is still unable to realize the delayed access of trunking user terminals

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