Automatic fault recovery in a packet network

Details Automatic fault recovery in a packet network Automatic fault recovery in a packet network

1989-11-06

1991-05-14

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

371 82, H04J 314

Patent

active

050162438

ABSTRACT:
A transmission arrangement is disclosed for recovering from faults in transmission equipment or facilities forming so-called virtual circuits for transmitting packets in a network. Faults are detected in transmission paths associated with a network node and an individual fault indication message is generated for each network facility that has at least one virtual circuit affected by the fault. Each fault indication message includes the identity of each virtual circuit on the associated network facility affected by the fault. The message is transmitted in-band on at least one of the affected virtual circuits on the associated network facility. If affected virtual circuits are terminated in the node, they are switched to alternate virtual circuits. Otherwise, the fault indication messages are transmitted over the identified facilities to other unknown nodes. A node receiving a fault indication message determines which virtual circuits identified in the message are terminated in the node and which virtual circuits pass through the node. The virtual circuits that are terminated in the node are switched to alternate virtual circuits. For virtual circuits passing through the node, the network facilities associated with them are identified and a new fault indication message is generated for each of the identified facilities. Each of the generated fault indication messages is transmitted in-band on at least one virtual circuit on the, respective, identified network facility.

REFERENCES:
patent: 4550397 (1985-10-01), Turner et al.
patent: 4593154 (1986-06-01), Takeda et al.
patent: 4679189 (1987-07-01), Olson et al.
patent: 4703477 (1987-10-01), Adelmann et al.
patent: 4777595 (1988-10-01), Strecker et al.
patent: 4920529 (1990-04-01), Sasaki et al.
J. A. McDermid, "Design and Use of Comflex-A Hardware-Controlled Packet Switch", IEE Proceedings, vol. 127, Pt.E., No. 6, pp. 233-240, Nov. 1980.
I. Cidon et al., "Paris: An Approach to Integrated High-Speed Private Networks", International Journal of Digital and Analog Cabled Systems, vol. 1, No. 2, pp. 77-85, Apr.-Jun. 1988.
CCITT Recommendation Q.921, pp. 41-48.
Committee T1 Contribution, "Explicit Congestion Avoidance Indication as Part of Link Layer Management", T1S1, 1-89/339, T1S1.2-89/240, Jul. 17-19, 1989, pp. 1-14.
W. S. Lai, "Frame Relaying Service: An Overview", Proceedings IEEE INFOCOM 89, Apr. 23-27, 1989, pp. 668-673.
R. J. Cherukuri et al., "Frame Relay: Protocols and Private Network Applications", Proceedings IEEE INFOCOM 89, Apr. 23-27, 1989, pp. 676-685.

Affiliated with

Also associated with

Rating

Automatic fault recovery in a packet network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic fault recovery in a packet network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic fault recovery in a packet network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1654349