Patent ID: 6690658
Filing Date: 2004-02-10
Classification: H04L,H04W

Abstract:
Communication system using a time division multiple access TDMA data transfer method, wherein data is transferred in frames, with a frame being divided in a number of time slots and a frame consisting of several control time slots at the beginning and subsequent data time slots, wherein a specific control time slot is dedicated to a specific user and wherein to each time slot a first defined guard time is associated, characterized in that, a frame alignment is being made by the steps of:the timing of a first occupied control time slot of the frame is defined by referring back to the timing of the last occupied control time slot of the previous frame, each subsequent occupied control time slot is time-positioned with regard to the previous occupied control time slot of the same frame, the timing of the occupied data time slots within the frame is defined by referring back to the timing of the last occupied control time slot of the same frame, and wherein a second defined guard time is associated with the frame, this guard time being positioned at the end of the frame, wherein the second defined guard time is extended with regard to the first defined guard time.