Radio telephone channel selection

Details Radio telephone channel selection Radio telephone channel selection

1997-01-14

2000-03-07

Cumming, William

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

H04Q 732

Patent

active

060352019

ABSTRACT:
A portable handset (7) in a radio cellular telephone system undergoes a channel scan routine to establish the identity of a base station (8a, 8b, 8c) producing the strongest valid signal at the handset. The routine (FIG. 3) involves detecting the signal strengths of all channels, ranking the channels in order of decreasing signal strengths and then checking the validity of each channel in the ranking order. This is likely to be quicker and to require less storage space than the conventional routine which involves saving channel number, signal strengths and validity of all channels, storing these details in a channel table and then selecting a valid channel with the strongest signal.

REFERENCES:
patent: 4799253 (1989-01-01), Stern et al.
patent: 5159593 (1992-10-01), D'Amico et al.
patent: 5396647 (1995-03-01), Thompson et al.

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