TDM hand-off technique using time differences

Details TDM hand-off technique using time differences TDM hand-off technique using time differences

1992-06-16

1993-11-09

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

455 332, 455 561, 379 60, H04J 316, H04Q 704, H04Q 702

Patent

active

052609430

ABSTRACT:
A subscriber makes its hand-off decision based on time difference measurements between synchronization markers received from adjacent repeaters relative to the synchronization markers received from the subscriber's assigned repeater. The subscriber uses signal quality measurements to identify candidate repeaters with adequate signal level, and the time difference measurements to decide which of these repeaters is geographically closest. Thus, the subscriber unit makes hand-off decisions as its movement closes the distance to an adjacent repeater that can provide an adequate signal level.

REFERENCES:
patent: 4926421 (1990-05-01), Kawano et al.
patent: 4972506 (1990-11-01), Uddenfeldt
patent: 5179559 (1993-01-01), Crisler et al.

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