Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-02-22
1998-04-14
Eisenzopf, Reinhard J.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455 381, 4551861, H04B 700, H04Q 700
Patent
active
057405344
ABSTRACT:
A selective call receiver (106) has a frequency synthesizer (708) for scanning a plurality of frequencies to determine a control channel to receive a signal and a receiver (704) for receiving the signal representative of an available frequency associated with a geographic region. The signal includes a channel identifier (404), a frequency assignment (406) and an active channel indicator (408). A processor (712) associates the channel identifier (404) with the frequency assignment (406) in response to the active channel indicator (408) indicating an available frequency of the geographic region and a memory (720) stores channel identifiers (404) associated with frequency assignments (406) designating available frequencies (408). The receiver (704) receives an address (333) and the channel identifier (404) on the control channel, a decoder (714) decodes the channel identifier (404) associated with the frequency assignment (406) to determine the available frequency where a message will be transmitted and the frequency synthesizer (708) switches to the available frequency indicated by the channel identifier (404) for receiving the message.
REFERENCES:
patent: 5020130 (1991-05-01), Grube et al.
patent: 5101508 (1992-03-01), Owaki
patent: 5206855 (1993-04-01), Schwendeman et al.
patent: 5262769 (1993-11-01), Holmes
patent: 5393713 (1995-02-01), Schwob
patent: 5491469 (1996-02-01), Schwendeman
patent: 5574985 (1996-11-01), Yikotila
Ayerst Douglas I.
Choi Kwok K.
Khan Malik J.
Moore Morris
Nelson Leonard E.
Chanroo Keith A.
Eisenzopf Reinhard J.
Kincaid Lester G.
Motorola Inc.
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