Abstract
In attempts to realize a highly reliable transmission network using the optical fiber, transmission devices with high‐level communication control functions have been developed. However, no method of network design utilizing the characteristics of such devices has been presented.
This paper proposes a design method for realizing the fiber‐optic network at a low cost and satisfying the service requirements from the network users as far as possible even in the case of a fault by making use of various transmission devices. For this purpose, the components of the fiber‐optic network are modeled and a measure for evaluating the network reliability is introduced. Based on this measure, the design for the highly reliable fiber‐optic network is formulated as an integer programming problem.
An algorithm is presented which can derive a solution with a low cost and that realizes the required performance even in the cause of a fault. Also, the routing method is discussed which is needed in the design of a highly reliable network.
It is shown through numerical examples that the network can be designed at a lower cost for the fault recovery than the traditional shortest path routing by executing the routing so that the traffic is made uniform for all communication paths.