Patent ID: 6301242
Filing Date: 2001-10-09
Classification: G10L,H04B,H04L,H04W

Abstract:
In a communication system comprising at least one base station capable of communicating with a plurality of user stations according to a time division multiple access protocol in which a series of time frames are each divided into a plurality of time slots, said time slots each comprising a user transmission interval and a base transmission interval, a method of communication comprising the steps of:transmitting a first base-to-user message from the base station in the base transmission interval of a first time slot, said first base-to-user message comprising a first information element indicating a first relative time position for a subsequent communication within a timespan of a single time frame;receiving said first base-to-user message at a user station;transmitting, according to said first relative time position, a first user-to-base message from said user station to said base station;receiving said first user-to-base message at said base station;transmitting thereafter a second base-to-user message from the base station in the base transmission interval of a second time slot within the timespan of said single time frame, said second base-to-user message comprising a second information element indicating a second relative time position for a subsequent communication;receiving said second base-to-user message at said user station;transmitting, according to said second relative time position, a second user-to-base message from said user station to said base station; andreceiving said second user-to-base message at said base station.