Subscriber return system for CATV full service networks
First Claim
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1. A system for connecting at least one subscriber device to an off-premises broad band transmission system for two-way communication, comprising:
- means for providing service channels from the off-premises broad band transmission system to an entry point over a plurality of carrier frequencies in a first band, and for carrying return transmissions from the entry point over at least one carrier frequency in a second band of frequencies lower than the first band, anda subscriber premises local bus (SPLB) connected to the entry point for carrying the service channels to the at least one subscriber device over the carrier frequencies in the first band,characterized in that the system further comprises;
means for providing a return transmission signal from the at least one subscriber device to the bus at at least one carrier frequency in a third band of frequencies higher than the first band, and for coupling the signal in the third band to the subscriber premises local bus, andthe entry point comprises means for converting the return signal from the subscriber premises local bus in the third band to a return signal in the second band, the return signal in the second band being one of the return transmissions.
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0 Petitions
Accused Products
Abstract
A subscriber premise local bus (SPLB) is connected to a cable drop from a wide-band 2-way network through a gateway device providing frequency conversion and blocking of certain frequencies used in the subscriber premises local bus (SPLB). Service channels to the consumer are provided in a first band such as 54 to 750 MHZ, carried unchanged over the SPLB. Return signals from the subscriber are generated at subscriber devices, such as TV, computers, etc. at, or are up-converted to, signals in a higher frequency band, such as 900 to 950 Mhz, for transmission on the SPLB to the gateway device where they are down-converted to frequencies below 54 Mhz for transmission over the network. A band-pass or other filter may block at least some of the lower frequencies from carrying over from the SPLB to the cable drop or 2-way network.
139 Citations
18 Claims
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1. A system for connecting at least one subscriber device to an off-premises broad band transmission system for two-way communication, comprising:
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means for providing service channels from the off-premises broad band transmission system to an entry point over a plurality of carrier frequencies in a first band, and for carrying return transmissions from the entry point over at least one carrier frequency in a second band of frequencies lower than the first band, and a subscriber premises local bus (SPLB) connected to the entry point for carrying the service channels to the at least one subscriber device over the carrier frequencies in the first band, characterized in that the system further comprises; means for providing a return transmission signal from the at least one subscriber device to the bus at at least one carrier frequency in a third band of frequencies higher than the first band, and for coupling the signal in the third band to the subscriber premises local bus, and the entry point comprises means for converting the return signal from the subscriber premises local bus in the third band to a return signal in the second band, the return signal in the second band being one of the return transmissions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for connecting at least one subscriber device to an off-premises broad band transmission system for two-way communication, comprising:
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means for providing service channels from the off-premises broad band transmission system to an entry point over a plurality of carrier frequencies in a first band, and for carrying return transmissions from the entry point over at least one carrier frequency in a second band of frequencies lower than the first band, and a subscriber premises local bus (SPLB) connected to the entry point for carrying the service channels to the at least one subscriber device over the carrier frequencies in the first band, characterized in that the system further comprises; means for providing a return transmission signal from the at least one subscriber device to the bus at at least one carrier frequency in a third band of frequencies higher than the first band, and for coupling the signal in the third band to the subscriber premises local bus, and the entry point comprises means for converting the return signal from the subscriber premises local bus in the third band to a return signal in the second band, the return signal in the second band being one of the return transmissions, and a stop band device for blocking signals on the SPLB at least one frequency in said second band from being transmitted to the means for carrying. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification
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Current AssigneeBroadband Royalty Corporation (CommScope Holding Company, Inc.)
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Original AssigneeUS Philips Corporation (Koninklijke Philips N.V.)
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InventorsChapman, Mark, Staiger, John G., Gurusami, Aravanan
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Primary Examiner(s)Metjahic, Safet
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Assistant Examiner(s)GRANT, CHRISTOPHER C
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Application NumberUS08/366,341Time in Patent Office629 DaysField of Search348/11, 348/6, 348/10, 348/8, 348/12, 348/13, 455/3.1, 455/4.1, 455/4.2, 455/5.1, 455/6.1, 455/6.2US Class Current725/126CPC Class CodesH04N 7/17309 Transmission or handling of...
