Patent US4584679A successfully refreshed from Google Patents.
US4584679A
Expired / Lapsed
US
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Tack-on acknowledgement in computer networks
Assignee: Raytheon Co
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Filing: 1985-06-21
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Granted: 1986-04-22
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Expires: 2005-06-21
Abstract
Abstract A method of communicating is disclosed in which the receiving device acknowledges the receipt of a valid transmission and awaits the receipt of an abort message from the transmitting device before accepting the transmitted data. The transmitting device awaits the receipt of a valid acknowledgement and, if it fails to receive such an acknowledgement within a predetermined time-period, transmits an abort message to the receiving device. In multinodal, peer network communication systems, the acknowledgement and abort message may be transmitted during brief, dedicated time-periods following the transmission of data.
Inventors
- 👤 William D. Livingston
- 👤 Eugene E. Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:26
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0751; G06F11/0754; G06F11/0757; G06F13/00; G06F13/14; G06F13/36; G06F13/368; G06F13/372; G06F13/38; G06F13/42; G06F13/4204; G06F13/4208; G06F13/4213; H; H04; H04L; H04L12/00; H04L12/28; H04L12/40; H04L12/407; H04L12/413
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
An apparatus for communicating data, comprising: (a) means for transmitting data; (b) means for receiving and storing without acceptance the transmitted data; (c) means for evaluating the stored data for validity; (d) means for acknowledging receipt of the data if evaluated to be valid; (e) means for transmitting an abort message when no valid acknowledgement is received within a first, predetermined time period; and (f) means for accepting the stored data if not aborted within a second, predetermined time period.
Claim 2
Independent Claim
80 words
An apparatus for communicating data, comprising: (a) means for transmitting data; (b) means for receiving and storing without acceptance the transmitted data; (c) means for evaluating the stored data for validity; (d) means for acknowledging receipt of the data if evaluated to be valid; (e) means for transmitting an abort message when no valid acknowledgement is received within a first, predetermined time period; and (f) means for accepting the stored data if not aborted within a second, predetermined time period.
Claim 3
Independent Claim
143 words
An apparatus for communicating data packets over a transmission medium between a first device and a second device, comprising: (a) means for transmitting a data packet at the first device; (b) means for receiving and storing without acceptance the transmitted data packet at the second device; (c) evaluating the validity of the format and content of the stored data packet at the second device; (d) means for acknowledging receipt of the stored data packet if evaluated to be valid at the second device; (e) means for transmitting an abort message at the first device if no valid acknowledgement from the second device is received within a first predetermined time period; and (f) means for accepting the stored valid data packet at the second device in the absence of receipt of an abort message from the first device within a second predetermined time period.
Claim 4
Independent Claim
143 words
An apparatus for communicating data packets over a transmission medium between a first device and a second device, comprising: (a) means for transmitting a data packet at the first device; (b) means for receiving and storing without acceptance the transmitted data packet at the second device; (c) evaluating the validity of the format and content of the stored data packet at the second device; (d) means for acknowledging receipt of the stored data packet if evaluated to be valid at the second device; (e) means for transmitting an abort message at the first device if no valid acknowledgement from the second device is received within a first predetermined time period; and (f) means for accepting the stored valid data packet at the second device in the absence of receipt of an abort message from the first device within a second predetermined time period.
Claim 5
Dependent Claim
48 words
The apparatus of claim 2 wherein the acknowledging and the transmitting of an abort message are performed during dedicated time period of a length which is brief relative to the length of the data packet and which proximately follow the end of the transmission of the data packet.
Claim 6
Dependent Claim
30 words
The apparatus of claim 2 wherein the acknowledging and the transmitting of an abort message are automatically suppressed by a data packet addressed to be received simultaneously by a device.
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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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |