Base transceiver station for cellular mobile radio system and sy

Details Base transceiver station for cellular mobile radio system and sy Base transceiver station for cellular mobile radio system and sy

1999-01-25

2000-06-06

Pham, Chi H.

Pulse or digital communications

Synchronizers

Network synchronizing more than two stations

455502, 370350, 370508, H04L 700

Patent

active

060728477

ABSTRACT:
A system for synchronizing base transceiver stations includes a reference base transceiver station and a subordinate base transceiver station. Each base transceiver station has a clocks with the same frequency but any relative phase, and a timing reference. The reference base transceiver station imposes its own timing reference on each subordinate base transceiver station to compensate the phase difference between the two stations. The timing reference is imposed by having a mobile station listen to the reference base transceiver station and the subordinate base transceiver station, deducing a time shift D1 between the two base transceiver stations from the perspective of the mobile, determining a propagation time difference D2 between the mobile and the reference base transceiver station and the subordinate base transceiver station upon the occurrence of a handover that involves the reference base transceiver station. From D1 and D2 there can be determined the time shift to be used in order to synchronize the subordinate to the reference base transceiver station.

REFERENCES:
patent: 5414731 (1995-05-01), Antunes et al.
patent: 5519710 (1996-05-01), Otsuka
patent: 5627880 (1997-05-01), Rozanski et al.
patent: 5828659 (1998-10-01), Teder et al.

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