Synchronization in TDMA systems in a non-realtime fashion

Details Synchronization in TDMA systems in a non-realtime fashion Synchronization in TDMA systems in a non-realtime fashion

1996-09-30

1999-02-16

Pham, Chi H.

Pulse or digital communications

Synchronizers

Network synchronizing more than two stations

370324, 370509, H04L 700

Patent

active

058728201

ABSTRACT:
A method and apparatus for synchronization between a base station sub-system and a mobile station. The mobile station listens for a message frame number which is generated by the base station sub-system. The mobile station includes a mobile frame number counter which tracks the progression of frame numbers. When first powered-up, the mobile frame number counter may not be synchronized with the base station sub-system. The frame numbers of the base station sub-system and mobile frame number counter values are continuously incremented to track the progression of frame numbers in real-time. To effect synchronization, a received and decoded frame number is loaded into the counter. Then, a time lag is calculated which represents the delay inherent in receiving and decoding, within the mobile station and its components, frame numbers from the base-station sub-system. The time lag is then added to the mobile frame number counter of the mobile station so that the mobile frame number counter is synchronized with the base station sub-system.

REFERENCES:
patent: 4287597 (1981-09-01), Paynter et al.
patent: 4543657 (1985-09-01), Wilkinson
patent: 5361277 (1994-11-01), Grover
patent: 5613195 (1997-03-01), Ooi

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