Abstract
In this paper, we present packet data transmission process and analyze packet data random access mechanism with discrete frame format according to Slotted-ALOHA protocol in Terrestrial Trunked Radio (TETRA) network. A mathematical model of packet data random access is built for further simulations based on MATLAB. Given the simulations results, we achieve the performance indicator of access delay, packet data access success rate, and the average number of collisions of data packet data in TETRA network. And finally, we discuss the relative parameters that impact these performance indexes. The packet data access model and simulation conclusion proposed here have instructive significance for the design and development of TETRA network.
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