US5696790A
Expired / Lapsed
US
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Method and apparatus for time dependent data transmission
Assignee: Arris Enterprises LLC
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Filing: 1995-10-04
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Granted: 1997-12-09
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Expires: 2015-10-04
Abstract
Abstract An encoding and decoding mechanism for communicating digital data where the binary states are represented by a duration of time between transitions of a signal. For instance, the time between zero crossings of a signal are used to represent binary states. These times can be selected so as to avoid ambiguities between the binary state being detected even where the transmission medium is irregular. A typical application is the creation of a LAN in a home using twisted pair telephone lines. The LAN can be made to be transparent and independent of telephone service received over lines shared with the LAN.
Inventors
- 👤 Martin H. Graham
- 👤 Matthew Taylor
- 👤 Mark Miller
- 👤 Kevin Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:52
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/493; G; G06; G06F; G06F1/00; G06F1/02; G06F1/025; H04L12/00; H04L12/28; H04L12/2803; H04L12/2838; H04L2012/284; H04L2012/2845
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
121 words
A method for transmitting data where the data is represented by at least two states comprising the steps of: providing a first signal having a first duration to represent one of the two states; providing a second signal having a second duration different than the first duration to represent the other of the two states; and, transitioning the signals through a predetermined electrical condition for each transmitted data state without a time delay between the signals; wherein the first signal has a first amplitude and the second signal has a second amplitude different than the first amplitude and wherein a first product of the first duration and first amplitude approximately equals a second product of the second duration and second amplitude.
Claim 2
Independent Claim
121 words
A method for transmitting data where the data is represented by at least two states comprising the steps of: providing a first signal having a first duration to represent one of the two states; providing a second signal having a second duration different than the first duration to represent the other of the two states; and, transitioning the signals through a predetermined electrical condition for each transmitted data state without a time delay between the signals; wherein the first signal has a first amplitude and the second signal has a second amplitude different than the first amplitude and wherein a first product of the first duration and first amplitude approximately equals a second product of the second duration and second amplitude.
Claim 3
Dependent Claim
20 words
The method defined by claim 1 wherein the transitioning step comprises changing the signal from one polarity to another polarity.
Claim 4
Dependent Claim
18 words
The methods defined by claims 1 or 2 wherein the first duration and second duration are pseudorandomly dithered.
Claim 5
Independent Claim
86 words
A method for transmitting data where the data is represented by at least two states comprising the steps of: providing a first signal having a first duration to represent one of the two states; providing a second signal having a second duration different than the first duration to represent the other of the two states; and, transitioning the signals through a predetermined electrical condition for each transmitted data state without a time delay between the signal wherein the first duration and second duration are pseudorandomly dithered.
Claim 6
Independent Claim
86 words
A method for transmitting data where the data is represented by at least two states comprising the steps of: providing a first signal having a first duration to represent one of the two states; providing a second signal having a second duration different than the first duration to represent the other of the two states; and, transitioning the signals through a predetermined electrical condition for each transmitted data state without a time delay between the signal wherein the first duration and second duration are pseudorandomly dithered.
Claim 7
Independent Claim
112 words
A method for detecting data where the data is represented by at least two states comprising the steps of: recognizing one of the two states from a first signal having a first duration; recognizing the other of the two states from a second signal having a second duration; detecting a predetermined electrical condition occurring without a time delay between the signals for each transmitted data state; and wherein the first signal has a first amplitude and the second signal has a second amplitude different than the first amplitude and wherein a first product of the first duration and first amplitude approximately equals a second product of the second duration and second amplitude.
Claim 8
Independent Claim
112 words
A method for detecting data where the data is represented by at least two states comprising the steps of: recognizing one of the two states from a first signal having a first duration; recognizing the other of the two states from a second signal having a second duration; detecting a predetermined electrical condition occurring without a time delay between the signals for each transmitted data state; and wherein the first signal has a first amplitude and the second signal has a second amplitude different than the first amplitude and wherein a first product of the first duration and first amplitude approximately equals a second product of the second duration and second amplitude.
Claim 9
Independent Claim
67 words
A method for transmitting data comprising: selecting a plurality N of time intervals each different from the other; selecting a bit packet for each of the N time intervals; generating a signal which transitions between at least two states with intervals between the transitions being selected from the N time intervals which are pseudorandomly dithered so as to correspond to bit packets which are to be transmitted.
Claim 10
Independent Claim
67 words
A method for transmitting data comprising: selecting a plurality N of time intervals each different from the other; selecting a bit packet for each of the N time intervals; generating a signal which transitions between at least two states with intervals between the transitions being selected from the N time intervals which are pseudorandomly dithered so as to correspond to bit packets which are to be transmitted.
References Cited (Backward Citations)
US4817115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-08 | 2001-06-09 | 2001-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-08 | 2005-06-09 | 2005-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-08 | 2009-06-09 | 2009-12-09 | $7700.00 | Window Closed / Lapsed |