Restoration method for multiplexed circuits
AssigneeAT&T Corp.
InventorPeter S. Cornell
Life of this patent
Estimating the term…
Abstract
Restoration of a multiplexed circuit in a network (10) is effected in accordance with the probability of failure of that circuit determined in accordance with: (1) how many constituent circuits in the multiplexed circuit are provisioned for service; (2) how many constituent circuits in the multiplexed circuit have failed and (3) how many constituent circuits in the multiplexed circuit are in service and out of service. If the probability of failure differs from a prescribed reference value by a predetermined threshold, a processor (28) effects restoration by choosing an alternate path.
Claims12
A method for restoring within a network at least one multiplexed circuit formed by multiplexing a plurality of constituent circuits, comprising:
- (a) determining a probability of failure of said one multiplexed circuit in accordance with (1) how many constituent circuits in the multiplexed circuit are provisioned for service;
- (2) how many constituent circuits in the multiplexed circuit have failed and (3) how many constituent circuits in the multiplexed circuit are in service and out of service;
- (b) comparing the probability of failure of said multiplexed circuit to a prescribed value, and if the probability of failure value differs from the set value by more than a predetermined threshold, then
- (c) restoring the multiplexed circuit by providing an alternate path.
In combination with a network comprised of a plurality of nodes linked by transmission channels, each carrying at least one multiplexed circuit formed by multiplexing a plurality of constituent circuits, apparatus for restoring a failed circuit by routing the circuit over a combination of said channels, the apparatus comprising:
- a database storing a record for each multiplexed circuit specifying (1) how many constituent circuits in the multiplexed circuit are provisioned for service;
- (2) how many constituent circuits in the multiplexed circuit have failed and (3) how many constituent circuits in the multiplexed circuit are in service and out of service;
- and
- a processor for accessing the data base to determine the probability of failure of at least one multiplexed circuit in accordance with (1) how many constituent circuits in the multiplexed circuit are provisioned for service;
- (2) how many constituent circuits in the multiplexed circuit have failed and (3) how many constituent circuits in the multiplexed circuit are in service and out of service, and for effecting restoration when the probability of failure differs from a prescribed reference value by a predetermined threshold.
Dependencies are inferred from the claim text.