Identification code search in a communication device

Details Identification code search in a communication device Identification code search in a communication device

1992-08-10

1995-04-18

Urban, Edward F.

Telecommunications

Transmitter and receiver at separate stations

455 342, 4551662, 379 62, H04Q 700

Patent

active

054086825

ABSTRACT:
With cordless telephones it is a known fact that each pair of radio stations has m radio channels out of n possible radio channels in common. During a test cycle the mobile unit examines only the common radio channels. Consequently, the test period required for testing only the common channels is shorter than the time necessary for testing all channels. If, by chance, all common channels are busy or if such a situation is the result of a malfunctioning, establishing a link between the base unit and the mobile unit is no longer possible. In the proposed embodiment of a cordless telephone, reliably establishing a link is guaranteed in that in a first test phase the common channels and in a second test phase all n radio channels are tested. A field of application of the invention is the cordless telephone.

REFERENCES:
patent: 4741049 (1988-04-01), De Jager et al.
patent: 4744101 (1988-05-01), Saegusa
patent: 4896370 (1990-01-01), Kasparian et al.
patent: 4921464 (1990-05-01), Ito et al.
patent: 4977611 (1990-12-01), Maru

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