Patent ID: 6631142
Filing Date: 2003-10-07
Classification: H04W

Abstract:
A delay correction system for a wireless telephone system in which a base station apparatus and at least one subscriber apparatus carry out transmitting and receiving operations via respective communication means, in conformance with a time division multiple access (TDMA) system using the base station apparatus as a synchronization reference, said delay correction system comprising:measuring instruction input means for inputting a delay measuring instruction which instructs a delay measurement based on a new registration or a moving of the subscriber apparatus; delay measuring means, responsive to the delay measuring instruction, for measuring a delay quantity between the base station apparatus and the subscriber apparatus based on a signal received over a control channel; and first timing adjusting means, provided in the subscriber apparatus, for receiving transmitting information which is to be sent to the base station apparatus at an allocated time slot, and for adjusting a timing of the transmitting information depending on the delay quantity before sending the transmitting information.