Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-01-30
2007-01-30
Gesesse, Tilahun (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S062000, C455S071000
Reexamination Certificate
active
11215674
ABSTRACT:
A receiving device in a trunked radio communications system determines a transmit frequency, wherein the transmit frequency is calculated by subtracting 440 from a voice channel number, multiplying by a channel spacing and adding a base frequency to yield the transmit frequency, if the voice channel number is between 440 and 559. The receiving device determines a receive frequency by 851.0250 MHz+[(a voice channel number−440)*25,000 Hz], if the voice channel number is between 440 and 559. In any case, the voice channel number is communicated in an outbound signaling message defined by Motorola's 3600-baud radio trunking protocol.
REFERENCES:
patent: 4646345 (1987-02-01), Zdunek et al.
patent: 4716407 (1987-12-01), Borras et al.
patent: 4723264 (1988-02-01), Sasuta et al.
patent: 4870408 (1989-09-01), Zdunek et al.
patent: 5020130 (1991-05-01), Grube et al.
patent: 5225843 (1993-07-01), Thompson
patent: 5515419 (1996-05-01), Sheffer
patent: 5778322 (1998-07-01), Rydbeck
patent: 5862486 (1999-01-01), Przelomiec
patent: 5960351 (1999-09-01), Przelomiec
patent: 6188979 (2001-02-01), Ashley
patent: 6252910 (2001-06-01), West et al.
patent: 6308050 (2001-10-01), Eklof
patent: 6519472 (2003-02-01), Brennan et al.
patent: 6529486 (2003-03-01), Barnes et al.
patent: 6804529 (2004-10-01), Barnes et al.
patent: 6922135 (2005-07-01), Abraham
TIA TSB-102.AABC, “Project 25 Trunking Control Channel Messages New Technology Standards Project Digital Radio Technical Standards TR-8.10 Subcomittee”, May 31, 1996.
TIA TSB-102.AABD, “Project 25 Trunking Procedures New Technology Standards Project Digital Radio Technical Standards”, Oct. 1997.
Gilbert John M.
McDonald Daniel J.
Trandai Tanhoa
Wilson Christopher H.
Davis Valerie M.
Gesesse Tilahun
Motorola Inc.
Saladi Indira
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