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US5726976A
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Congestion sense controlled access for a star configured network
Assignee: Nortel Networks Ltd
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Filing: 1994-08-10
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Granted: 1998-03-10
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Expires: 2014-08-10
Abstract
Abstract A method and approach for providing improved performance in a CSMA/CD-type network utilizing transmission of block encoded congestion sense signaling to allow full duplex transmission of data over a communication link segment. In addition, the method and apparatus for providing in-band signaling of congestion conditions is described. The improved method and apparatus are implemented with minimal changes to existing standards and allow for compatibility, above the MAC sublayer, with existing installed hardware and software bases.
Inventors
- 👤 Geoffrey O. Thompson
- 👤 Peter Tarrant
- 👤 Som Sikdar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:31
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/40; H04L12/4013; H04L12/40136; H04L12/407; H04L12/413; H04L12/44; H04L47/00; H04L47/10; H04L47/12; H04L47/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
A method of transmitting information on a carrier sense network comprising: (a) transmitting block encoded idle signals from a first device to a second device over a first communication channel during a first period when said first device does not have other information for transmission to said second device; (b) said first device preparing other information for transmittal on said network; (c) said first device transmitting said other information on said network during a second period, said other information starting with a block encoded start of frame delimiter; and (d) said first device receiving frames and idle signals during said first period and said second period on a second communication channel, said first device sensing a congestion condition as a result of receiving information on said second communication channel.
Claim 2
Independent Claim
129 words
A method of transmitting information on a carrier sense network comprising: (a) transmitting block encoded idle signals from a first device to a second device over a first communication channel during a first period when said first device does not have other information for transmission to said second device; (b) said first device preparing other information for transmittal on said network; (c) said first device transmitting said other information on said network during a second period, said other information starting with a block encoded start of frame delimiter; and (d) said first device receiving frames and idle signals during said first period and said second period on a second communication channel, said first device sensing a congestion condition as a result of receiving information on said second communication channel.
Claim 3
Dependent Claim
27 words
The method as recited by claim 1 wherein said other information further comprises destination address information, source address information, length information, user dam, and frame checking information.
Claim 4
Dependent Claim
38 words
The method as recited by claim 1 wherein said congestion condition is sensed during said second period and said first device transmits a block encoded congestion sense signal during said second period responsive to sensing said congestion condition.
References Cited (Backward Citations)
US4630288A
Cited
US4759018A
Cited
US4920533A
Cited
US5119372A
Cited
US5012467A
Cited
US5121382A
Cited
US5046182A
Cited
US5293377A
Cited
US5249183A
Cited
US5311114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-03-09 | 2001-09-08 | 2002-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-09 | 2005-09-08 | 2006-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-09 | 2009-09-08 | 2010-03-10 | $7700.00 | Window Closed / Lapsed |