Patent ID: 6347092
Filing Date: 2002-02-12
Classification: H04J,H04Q

Abstract:
A time division multiple access communication system comprising a plurality of subscriber's units and a center unit for performing a time division multiple access communication with respect to said subscriber's units, with a synchronization establishing signal being exchanged between said center unit and each of said subscriber's units for establishing synchronization in the communication between said center unit and said subscriber's unit so that said subscriber's unit controls its own signal transmission timing to establish the synchronization of the communication with said center unit, said center unit including:a channel receiving section for receiving a frame signal including said synchronization establishing signal from a non-synchronization established subscriber's unit, whose receive timing is variable in the frame signal in accordance with a distance from said non-synchronization established subscriber's unit, as a varying channel signal, and a communication signal, as a fixed channel signal, from a synchronization established subscriber's unit at a constant timing; and a control section for controlling receive processing in said channel receiving section so as to receive said varying channel signal from the non-synchronization established subscriber's unit during a fixed channel receive period for receiving and processing said fixed channel signal from the synchronization established subscriber's unit in the same frame signal.