TERMINAL RANDOM ACCESS METHOD FOR CELLULAR RADIO COMMUNICATIONS SYSTEM AND METHOD FOR GENERATING GROUP IDENTIFIER

摘要

A terminal random access method for a cellular radio communications system and a method for generating a group identifier are provided. The terminal random access method for a cellular radio communications system includes steps of: transmitting random access preamble message by a terminal to a base station in a random access time slot in a radio frame; combining location information of the random access time slot in the radio frame and that in the frequency domain to generate a group identifier and sending a random access response message to the terminal after adding the group identifier and an individual identifier that corresponds to the random access preamble message to the random access response message by the base station; judging whether the random access response message that corresponds to the sent random access preamble message is received, by judging whether the group identifier and the individual identifier within the received random access response message are all expected values. This invention provides fast and accurate access to the cellular radio communications system for the terminal and allows simple and easy operations to set a group identifier in the same way regardless of whether or not the configuration of the random access time slot changes.