US5490153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of lost frames in a communication link
Assignee: Cisco Technology Inc
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Filing: 1994-08-04
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Granted: 1996-02-06
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Expires: 2014-08-04
Abstract
Abstract A system and method for asynchronously transmitting data across fibers in a serial manner. Frames are provided as a mechanism to transmit associated data serially and tie the data being transmitted to a particular buffer set. Each buffer set maintains a state that keeps track of the progress and sequence of received frames. When transmission errors occur in the frames, the errors may affect header bits in the frame that identify the buffer set and the frame type. In this case, the entire frame is lost and the operation usually results in a timeout of the operation. By using this state information some of these lost frames can be recovered avoiding the lengthier timeout recovery procedure.
Inventors
- 👤 Thomas A. Gregg
- 👤 Joseph M. Hoke
- 👤 Albert Ing
- 👤 Chin Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:20
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/0078; H04L1/0083; G; G08; G08C; G08C25/00; G08C25/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A method for transmitting information bearing frames from a first location to a second location, said method of transmitting comprising the steps of: transmitting from said first location an information frame having a header field and a data field; subsequently receiving said information frame at a second location; determining from said received information frame header and from state information contained in memory means at said second location that a previously transmitted information frame had been received with corrupted header field information; constructing a control frame at said second location for transmission to said first location, said constructed frame having header field information indicating a request for retransmission of the frame having corrupted header information; and transmitting said frame constructed at said second location to said first location.
Claim 2
Independent Claim
127 words
A method for transmitting information bearing frames from a first location to a second location, said method of transmitting comprising the steps of: transmitting from said first location an information frame having a header field and a data field; subsequently receiving said information frame at a second location; determining from said received information frame header and from state information contained in memory means at said second location that a previously transmitted information frame had been received with corrupted header field information; constructing a control frame at said second location for transmission to said first location, said constructed frame having header field information indicating a request for retransmission of the frame having corrupted header information; and transmitting said frame constructed at said second location to said first location.
References Cited (Backward Citations)
US5105423A
Cited
US5168497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |