Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
1997-12-18
2001-08-07
Tsang, Fan (Department: 2746)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S561000, C455S007000, C348S021000
Reexamination Certificate
active
06272351
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
The present invention relates generally to the field of communications systems, and more particularly to a repeater node network system and method.
BACKGROUND OF THE INVENTION
In a point-to-multipoint wireless communication system, a central office communicates throughout a coverage area with multiple remote base stations, which in turn communicate with customer transmitter-receiver units, known as customer premises equipment (CPE). This communication may include the passing of voice, data and video signals between the central office and the customer.
Each remote base station, or node, communicates with customer premises equipment by means of extremely high- frequency radio waves. The central office communicates with each node by means of a fiber optic cable. Providing a fiber optic cable connection between the central office and each node adds significantly to the cost of the system.
SUMMARY OF THE INVENTION
Therefore, a need has arisen for a wireless communication system that overcomes the disadvantages and deficiencies of the prior art.
In accordance with one wireless communication system is disclosed in which a central office generates a signal. A first base station or node receives the central office signal and transmits a first broadcast signal in a first frequency range in response to the central office signal. A second base station receives the first broadcast signal and transmits a second broadcast signal in a second frequency range in response to the first broadcast signal. A third base station receives the second broadcast signal and transmits a third broadcast signal in the first frequency range in response to the second broadcast signal.
A technical advantage of the present invention is that a plurality of base stations are each able to provide one- way or two-way communication to a plurality of customers, with only one base station receiving signals directly from the central office. Another technical advantage is that the base stations in the disclosed system are each able to simultaneously transmit and broadcast signals with minimal feedback between the receiver and the broadcast transmitter.
REFERENCES:
patent: 3906166 (1975-09-01), Cooper et al.
patent: 4965850 (1990-10-01), Schloemer
patent: 5408679 (1995-04-01), Masuda
patent: 5596330 (1997-01-01), Yokev et al.
patent: 5839074 (1998-11-01), Plehn
patent: 5890056 (1999-03-01), Garner et al.
Langston J. Leland
Marin James S.
Myers William K.
Weiner Douglas B.
Baker & Botts L.L.P.
Cisco Technology Inc.
Trost William
Tsang Fan
LandOfFree
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