US5539734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of maintaining PVC status packetized communication system
Assignee: Nokia Canada Inc
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Filing: 1994-07-21
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Granted: 1996-07-23
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Expires: 2014-07-21
Abstract
Abstract A method of managing an interface to an internal message pipe, such as an FDDI bus, comprises sending a status enquiry message to request the status of each PVC having a DLCI in a specified range, receiving a subset status message containing sequence exchange numbers corresponding to the last status message sent out, updating the contents of a station's PVC's in response to the received subset status message, and propagating PVC status changes between entities on the pipe.
Inventors
- 👤 Wayne Burwell
- 👤 Darren Helmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:52
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/38; G06F13/382; G06F13/387; Y; Y10; Y10S; Y10S370/00; Y10S370/901; Y10S370/902; Y10S370/903; Y10S370/906
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
A method of managing an interface to an internal message pipe interconnecting communications entities in a packetized communications system wherein permanent virtual connections (PVCs) are established in said message pipe, said method comprising sending from a transmitting entity a subset status enquiry message to request the status of each PVC in the pipe having a DLCI (Data Link Connection Identifier) in a specified range, receiving a subset status message containing sequence exchange numbers corresponding to the last status message sent out, updating an entity's PVC's in response to said received subset status message, and propagating PVC status changes between the communicating entities on said pipe.
Claim 2
Independent Claim
105 words
A method of managing an interface to an internal message pipe interconnecting communications entities in a packetized communications system wherein permanent virtual connections (PVCs) are established in said message pipe, said method comprising sending from a transmitting entity a subset status enquiry message to request the status of each PVC in the pipe having a DLCI (Data Link Connection Identifier) in a specified range, receiving a subset status message containing sequence exchange numbers corresponding to the last status message sent out, updating an entity's PVC's in response to said received subset status message, and propagating PVC status changes between the communicating entities on said pipe.
Claim 3
Dependent Claim
14 words
A method as claimed in claim 1, wherein said entities are frame relay engines.
Claim 4
Dependent Claim
14 words
A method as claimed in claim 2, wherein said pipe is an FDDI bus.
Claim 5
Dependent Claim
14 words
A method as claimed in claim 1, wherein said pipe is an ATM bus.
Claim 6
Dependent Claim
18 words
A method as claimed in claim 1, wherein said enquiry messages are sent over a DLCI 0 link.
Claim 7
Dependent Claim
21 words
A method as claimed in claim 1, wherein more than one Asynchronous status IE is packed into each Asynchronous status message.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-23 | 2000-01-22 | 2000-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-23 | 2004-01-22 | 2004-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-23 | 2008-01-22 | 2008-07-23 | $7700.00 | Window Closed / Lapsed |