Method and apparatus for providing control channels and message

Details Method and apparatus for providing control channels and message Method and apparatus for providing control channels and message

1995-05-01

1996-07-09

Hsu, Alpus H.

Multiplex communications

Wide area network

Packet switching

3701052, 3701101, 455 331, 455 512, 455 541, 455 70, 375219, 375295, 379 59, 379 63, H04J 316, H04J 400

Patent

active

055352154

ABSTRACT:
A method and apparatus in a radio communication system (100, 101) provides simulcast control channels for a coverage area (500), and message channels transmitted in coverage zones (502) within the coverage area (500) on a time-division multiplex basis (FIG. 4). A first modulation technique generates (814, 816, 818) each of the message channels at a first average output power substantially less than a peak output power of a transmitter (202). A second modulation technique generates (806, 808, 810) each of the control channels at a second average output power approximately equal to the peak output power of the transmitter (202), thereby increasing usable coverage distance from the transmitter (202) for the control channel compared to the message channel. The control channels are allocated (FIG. 5) to the coverage zones (502) in a staggered geographic pattern such that reception of the control channels is maintained substantially throughout the coverage area (500).

REFERENCES:
patent: 4875038 (1989-10-01), Siwiak et al.
patent: 5121391 (1992-06-01), Paneta et al.
patent: 5218717 (1993-06-01), Reitberger
patent: 5276686 (1994-01-01), Ito
patent: 5355367 (1994-10-01), Comroe et al.
patent: 5404573 (1995-04-01), Yabe et al.
patent: 5434904 (1995-07-01), Pegnet et al.

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