Broadband cable television and computer network
First Claim
Patent Images
1. A network bus comprising:
- a notch filter coupled to a coaxial cable, said coaxial cable routed in a tree configuration to a plurality of locations of a building, said notch filter configured to filter out a portion of video signals carried by said coaxial cable; and
a frequency converter, coupled to said coaxial cable, configured to receive signals from said coaxial cable at a first frequency and to forward said signals at a second frequency, wherein said first and second frequencies are within said filtered out portion.
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Abstract
A communication system is provided which may comprise an upstream source of broadband communications and a downstream local area network, wherein the upstream source of broadband communications is coupled to the downstream local area network through a notch filter. In some embodiments, the upstream source of broadband communications may be a cable television service provider, and the local area computer network may use existing cable television wiring as communication cable.
69 Citations
51 Claims
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1. A network bus comprising:
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a notch filter coupled to a coaxial cable, said coaxial cable routed in a tree configuration to a plurality of locations of a building, said notch filter configured to filter out a portion of video signals carried by said coaxial cable; and
a frequency converter, coupled to said coaxial cable, configured to receive signals from said coaxial cable at a first frequency and to forward said signals at a second frequency, wherein said first and second frequencies are within said filtered out portion. - View Dependent Claims (2, 3, 4, 5)
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6. A local area computer network comprising:
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a notch filter configured to receive a signal from a cable television transmission system and to filter out a portion of said signal in the range of approximately 50 MHz to approximately 750 MHz to produce a filtered signal;
a community antenna television wire configured to receive said filtered signal and routed in a tree configuration to a plurality of locations of a residence, said wire coupled to said notch filter;
a plurality of computers coupled to said wire, each of said computers having a modem configured to receive and transmit broadband signals between said computers;
wherein said computers are configured to send and receive communications between different ones of said computers via said modem by modulating a carrier having a frequency within said filtered out portion - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method of making a local area network, the method comprising:
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routing community antenna television wiring in a tree configuration to different parts of a structure;
coupling a notch filter to said wiring for filtering out one or more television broadcasts delivered to said wiring by a service drop of a community antenna television distribution system;
coupling to said wiring a plurality of computing devices; and
configuring at least some of said computing devices for two-way communication with others of said computing devices, wherein the two-way communication is carried at least in part over said wiring at at least one frequency within said filtered out television broadcasts. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method of networking computing devices, the method comprising:
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coupling a notch filter to coaxial wiring carrying television signals, wherein the coaxial wiring is routed in a tree configuration to a plurality of locations in a building. filtering out a frequency band comprising a portion of said television signals with the notch filter; and
establishing two-way communications between at least two computing devices, wherein said communications are carried at least in part over said coaxial wiring utilizing said frequency band. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A network device comprising:
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a receiver for receiving a television signal from a community antenna television system;
a transmitter for transmitting signals to a headend equipment of said community antenna television system; and
a modem configured to receive and transmit broadband signals between computing devices. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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42. A method of communicating data between computing devices comprising:
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receiving a television signal from a headend transmission equipment of a cable television transmission system;
filtering out a portion of said television signal in the range of approximately 50 MHz to approximately 750 MHz to produce a filtered signal;
coupling said filtered signal to unlooped cable television wiring;
coupling a plurality of computing devices to said wiring, wherein each of at least some of said computing devices comprises a modem configured to receive and transmit broadband signals between said computing devices; and
establishing two-way communications, at least in part over said cable television wiring, between different ones of said computing devices via said modem using at least one frequency within said filtered out portion. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification