Network synchronization for TDMA cellular communication using si

Details Network synchronization for TDMA cellular communication using si Network synchronization for TDMA cellular communication using si

1994-05-26

1996-05-21

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370108, 370107, 379 63, 455 541, H04J 316

Patent

active

055197108

ABSTRACT:
In a TDMA cellular communication network, one of the cell sites is a reference station for establishing a time reference in response to a timing signal from a mobile switching office, and each of the other cell sites is a subordinate station. Each subordinate station establishes a time slot in response to the timing signal from the mobile switching system and receives a signal from a mobile station located in the area of the reference station for detecting a time lapse between the time slot and the signal from the mobile station. A delay time is introduced to the time slot according to the time lapse so that the time slot is synchronized to the time reference of the reference station. In a second embodiment, each subordinate station transmits a signal indicative of the detected time lapse to the mobile switching system, where a delay time value is derived from those signals received from a chain of subordinate stations and returned to each subordinate station for performing the time slot adjustment. The delay time value is a modulo .tau. summation of the time lapses received from such chain of subordinate stations, where .tau. is the duration of the time slot.

REFERENCES:
patent: 4317195 (1982-02-01), Barberis et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5293380 (1994-03-01), Kondo
patent: 5323446 (1994-06-01), Kojima et al.
patent: 5355515 (1994-10-01), Sicher
patent: 5363373 (1994-11-01), Nakahara et al.

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