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US5765097A
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Shared hybrid fiber-coax network having reduced ingress noise in the upstream channel transmitted via a repeater
Assignee: AT&T Inc
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Filing: 1996-05-20
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Granted: 1998-06-09
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Expires: 2016-05-20
Abstract
Abstract A hybrid fiber-coax network (100) includes at least one repeater (220 1 ) dispersed within a coax trunk (22 1 ) that carries video information downstream to a subscriber (14) and subscriber-originated information upstream to a fiber node (18). The repeater serves to digitally regenerate the subscriber-originated information to reduce ingress noise that would otherwise aggregate at the fiber node.
Inventors
- 👤 James E. Dail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:03
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/12; H04H20/65; H04H20/76; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4917; H04L25/4919; H04L25/4921; H04L27/00; H04L27/26; H04L27/2601; H04N; H04N7/00; H04N7/10; H04N7/102; H04N7/16; H04N7/173; H04N7/17309
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
99 words
A method for reducing aggregated ingress noise in a shared fiber-coax network that carries information from a head end to a plurality of subscribers via at least one main coax trunk and for carrying information originated by said plurality of subscribers to said head end via said main coax trunk using a repeater, the method comprising the steps of: aggregating onto the main coax information generated by said plurality of subscribers; digitizing the aggregated subscriber-originated information; and digitally regenerating the digitized aggregated subscriber-originated information to reduce the incidence of noise in the aggregated subscriber-originated information on the main coax.
Claim 2
Independent Claim
99 words
A method for reducing aggregated ingress noise in a shared fiber-coax network that carries information from a head end to a plurality of subscribers via at least one main coax trunk and for carrying information originated by said plurality of subscribers to said head end via said main coax trunk using a repeater, the method comprising the steps of: aggregating onto the main coax information generated by said plurality of subscribers; digitizing the aggregated subscriber-originated information; and digitally regenerating the digitized aggregated subscriber-originated information to reduce the incidence of noise in the aggregated subscriber-originated information on the main coax.
Claim 3
Dependent Claim
77 words
The method according to claim 1 wherein the step of regenerating the subscriber-originated information includes the steps of: filtering the digitized subscriber-originated information to pass the information in a preselected band; demodulating the information within the preselected band; receiving the demodulated information via a receiver having a prescribed modulation format transmitting the information received by the receiver in accordance with said prescribed modulation format; modulating the transmitted information; and injecting the transmitted information into the trunk coax.
Claim 4
Dependent Claim
24 words
The method according to claim 2 wherein the filtering step includes the step of bypassing subscriber-originated information that is not within the preselected band.
Claim 5
Dependent Claim
40 words
The method according to claim 2 wherein the filtering step includes the step of blocking information within the preselected band for non-regeneration to allow use of such information by a second repeater without adding any noise at said second repeater.
Claim 6
Dependent Claim
16 words
The method according to claim 2 wherein the prescribed modulation format is Quadrature Phase Shift Keying.
Claim 7
Dependent Claim
15 words
The method according to claim 2 wherein the prescribed modulation format is Quadrature Amplitude Modulation.
Claim 8
Dependent Claim
15 words
The method according to claim 2 wherein the prescribed modulation format is Carrierless Amplitude Modulation.
Claim 9
Dependent Claim
14 words
The method according to claim 2 wherein the prescribed modulation format is Digital Multi-Tone.
Claim 10
Dependent Claim
15 words
The method according to claim 2 wherein the prescribed modulation format is Digital Wavelet Multi-Tone.
Claim 11
Dependent Claim
16 words
The method according to claim 1 wherein the subscriber-originated information is regenerated in multiple frequency bands.
Claim 12
Dependent Claim
30 words
The method according to claim 1 wherein the subscriber-originated information is regenerated by receiving the information via a single receiver and then transmitting the received information via a single transmitter.
Claim 13
Dependent Claim
28 words
The method according to claim 1 wherein the subscriber-originated information is regenerated by receiving the information with multiple receivers and then transmitting the information via multiple corresponding transmitters.
Claim 14
Dependent Claim
17 words
The method according to claim 1 wherein the subscriber-originated information is regenerated at a preset output level.
Claim 15
Dependent Claim
25 words
The method according to claim 1 wherein the subscriber-originated information is regenerated at an output level dependent on the input level of the received information.
Claim 16
Dependent Claim
29 words
The method according to claim 1 wherein the subscriber-originated information is regenerated in a particular frequency band in at least one time slot associated with said main coax trunk.
Claim 17
Dependent Claim
30 words
The method according to claim 1 wherein the subscriber-originated information is regenerated in a particular frequency band in time slots shared with multiple repeaters on at least one coax trunk.
Claim 18
Dependent Claim
21 words
The method according to claim 1 further including the step of utilizing downstream signal information for clock and framing reference purposes.
Claim 19
Dependent Claim
24 words
The method according to claim 1 wherein the digitally regenerated subscriber information passes on said coax and is digitally regenerated by a second repeater.
Claim 20
Dependent Claim
32 words
The method according to claim 2 wherein the said information having said prescribed modulation format comprises a burst, multiple access signal and wherein said signal is converted into a continuous point-to-point signal.
Claim 21
Dependent Claim
23 words
The method according to claim 19 wherein the continuous point-to-point signal has a modulation format the same as said burst, multiple access signal.
Claim 22
Dependent Claim
22 words
The method according to claim 19 wherein the continuous point-to-point signal has a different modulation format from said burst, multiple access signal.
Claim 23
Dependent Claim
33 words
The method according to claim 1 including the step of deriving a downstream signaling channel received by the repeater for the purpose of operations, performance monitoring, repeater configuration control and repeater software download.
Claim 24
Independent Claim
109 words
A method for reducing aggregated ingress noise in a shared fiber-coax network that carries information from a head end to a plurality of subscribers via a main coax and for carrying information originated by said plurality of subscribers to said head end via said main coax, the method comprising the steps of: aggregating information originated by said plurality of subscribers onto the main coax; digitizing the aggregated subscriber-originated information; extracting the digitized aggregated subscriber information lying within a first prescribed bandwidth; and digitally regenerating the digitized aggregated subscriber-originated information within said first prescribed bandwidth to reduce the incidence of noise in the aggregated subscriber-originated information on the main coax.
Claim 25
Independent Claim
109 words
A method for reducing aggregated ingress noise in a shared fiber-coax network that carries information from a head end to a plurality of subscribers via a main coax and for carrying information originated by said plurality of subscribers to said head end via said main coax, the method comprising the steps of: aggregating information originated by said plurality of subscribers onto the main coax; digitizing the aggregated subscriber-originated information; extracting the digitized aggregated subscriber information lying within a first prescribed bandwidth; and digitally regenerating the digitized aggregated subscriber-originated information within said first prescribed bandwidth to reduce the incidence of noise in the aggregated subscriber-originated information on the main coax.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-08 | 2001-12-08 | 2002-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-08 | 2005-12-08 | 2006-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-08 | 2009-12-08 | 2010-06-09 | $7700.00 | Window Closed / Lapsed |