Performance evaluation and enhancement of random access procedure in TETRA networks

In this paper, random access procedure in terrestrial trunked radio (TETRA) networks is described and modeled. Then, the impact of different random access parameters on performance metrics such as “delay” and “throughput” is evaluated. Moreover, in order to have a fast “call setup” which is one of the most important features of TETRA, it is shown that random access delay can be minimized, while maintaining peak throughput, by adaptively adjusting the random access parameters according to the backlogged traffic. The performance improvement of the proposed adaptive parameter adjustment is proved via extensive simulation results.