System and method for code division multiple access communication, and terminal apparatus for the same system

摘要

A code division multiple access communicating system equipped with a base station and a plurality of terminal apparatus exchanging spread spectrum information with said base station over a commonly used channel when communicating with said base station, comprising: said base station including: a receiving means for receiving an access signal from each of said plural terminal apparatus at the time of random access from each of said plural terminal apparatus; an acknowledge information transmitting means for putting, when receiving means receives the access signals from said plural terminal apparatus, acknowledge information of reception of the access signals in a transmission frame, and transmitting said frame to said plural terminal apparatus with a desired timing according to reception timing of the access signal; each of said plural terminal apparatus comprising: an acknowledge information receiving means for receiving the acknowledge information from said acknowledge information transmitting means of said base station; and a transmitting means for randomly accessing said base station then transmitting information in accordance with reception timing of acknowledge information received from said base station by said acknowledge information receiving means.