US5487064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Network layer packet structure
Assignee: International Business Machines Corp
•
Filing: 1994-05-31
•
Granted: 1996-01-23
•
Expires: 2014-05-31
Abstract
Abstract A packet switching communication system is improved by using a packet header structure which does not require a fixed format. The packet header comprises a chain of 2 byte command/data segments. Each command/data segment contains generic bits and a routing field. One of the generic bits (bit 1) allows the header to be extended with another command/data segment.
Inventors
- 👤 Claude Galand
- 👤 Gerald Lebizay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:53
CPC Classifications
H; H04; H04L; H04L9/00; H04L9/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
For use in a fast packet switching network used for transporting digital data packets, each packet having a header structure which includes a plurality of command and data segments, each with a disable indicator and one or more control bits, said network having a plurality of switching nodes interconnected by transmission links, a method of processing packets, said method being implemented at one or more of the switching nodes and including the steps of: receiving packets from other switching nodes over the transmission links; detecting the state of the disable indicator in each of the command and data segments in the header structure of each received packet; passing over any command and data segment having a disable indicator having a predetermined first value; and performing predetermined operations on the packet in accordance with the control bits found in the first command and data segment encountered having a disable indicator having a predetermined second value.
Claim 2
Dependent Claim
154 words
For use in a fast packet switching network used for transporting digital data packets, each packet having a header structure which includes a plurality of command and data segments, each with a disable indicator and one or more control bits, said network having a plurality of switching nodes interconnected by transmission links, a method of processing packets, said method being implemented at one or more of the switching nodes and including the steps of: receiving packets from other switching nodes over the transmission links; detecting the state of the disable indicator in each of the command and data segments in the header structure of each received packet; passing over any command and data segment having a disable indicator having a predetermined first value; and performing predetermined operations on the packet in accordance with the control bits found in the first command and data segment encountered having a disable indicator having a predetermined second value.
Claim 3
Dependent Claim
39 words
A method as set forth in claim 1 further including the step of setting, to the predetermined first value, the disable indicator in a command and data sequence which has been used in controlling the performance of packet operations.
Claim 4
Dependent Claim
144 words
In a fast packet switching network to be used for transporting digital data packets, each packet having a header structure which includes a plurality of command and data segments, each with a disable indicator and one or more control bits, said network having a plurality of switching nodes interconnected by transmission links, each switching node including: means for receiving packets from other switching nodes over the transmission links; means for detecting the state of the disable indicator in each of the command and data segments in the header structure of each received packet; means for passing over any command and data segment having a disable indicator having a predetermined first value; and means for performing predetermined operations on the packet in accordance with the control bits found in the first command and data segment encountered having a disable indicator having a predetermined second value.
Claim 5
Dependent Claim
144 words
In a fast packet switching network to be used for transporting digital data packets, each packet having a header structure which includes a plurality of command and data segments, each with a disable indicator and one or more control bits, said network having a plurality of switching nodes interconnected by transmission links, each switching node including: means for receiving packets from other switching nodes over the transmission links; means for detecting the state of the disable indicator in each of the command and data segments in the header structure of each received packet; means for passing over any command and data segment having a disable indicator having a predetermined first value; and means for performing predetermined operations on the packet in accordance with the control bits found in the first command and data segment encountered having a disable indicator having a predetermined second value.
Claim 6
Dependent Claim
39 words
A switching node as set forth in claim 3 further including means for setting, to the predetermined first value, the disable indicator in a command and data sequence which has been used in controlling the performance of packet operations.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-22 | 1999-07-24 | 2000-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-22 | 2003-07-24 | 2004-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-22 | 2007-07-24 | 2008-01-23 | $7700.00 | Window Closed / Lapsed |