Telecommunications system

Details Telecommunications system Telecommunications system

1995-11-15

1996-07-16

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 359136, 359158, 359167, H04J 1408, H04B 1000

Patent

active

055372414

ABSTRACT:
Error-free or rapid protection switching between two basestations, one main and one standby, or two transmitters (1,2) etc. of one basestation (8) is achieved using a downstream marshalling scheme involving the transmission of a sequence from the standby basestation to an outstation (9,10,11) at levels below the noise sensitivity of a receiver (7) at the outstation and alignment of the phases of the transmitted sequence and a reference main basestation sequence by, for example, a correlation process. If a similar upstream marshalling process is employed for marshalling additional outstations into the system the same circuitry can be used for phase alignment for both marshalling processes. (FIG. 1).

REFERENCES:
patent: 5063595 (1991-11-01), Ballance
patent: 5278690 (1994-01-01), Vella-Coleiro
patent: 5327277 (1994-07-01), Van der Plas et al.
patent: 5341365 (1994-08-01), Clarke
patent: 5357360 (1994-10-01), Imhoff et al.

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