Multiplex communications – Wide area network – Packet switching
Patent
1994-12-27
1996-09-03
Hsu, Alpus H.
Multiplex communications
Wide area network
Packet switching
3701053, 375356, 375371, 379 61, 455 541, 455 676, H04B 7212, H04J 306
Patent
active
055530770
ABSTRACT:
A method and device for automatic synchronization of data bursts that is applicable to cordless communications systems with time division multiple access, TDMA, for synchronizing the timebases of cordless terminals and base stations. This device, which periodically receives for a short interval of time, a burst reception signal (A) to be synchronized, incorporates a register (1) which stores the value of a counter (3) when the burst reception signal (A) is high and subtracts from it, in an adder circuit (2), a reference value (REF) in order to adjust the references between the two timebases. To the output value (DELTA), a maximum value (MAX) is added or subtracted in a second adder circuit (4), depending on what timebase, the internal or the reference one, is faster. The device's output is compared with that of the counter (3) in a comparator (5) and the output (T) from the comparator is applied to a control circuit (6) that determines the module in the counter (3) for lengthening or shortening the burst to achieve synchronism.
REFERENCES:
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patent: 4941155 (1990-07-01), Chuang et al.
patent: 5072445 (1991-12-01), Nawata
patent: 5229996 (1993-07-01), Backstrom et al.
patent: 5309439 (1994-05-01), Roos
Diaz Molina Francisco
Martinez Garcia Francisco J.
ALCATEL N.V.
Hsu Alpus H.
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