Reliable flow with failures in a network

In communication networks, there is a growing need for ensuring that networks maintain service despite failures. To meet this need, the concept of a /spl delta/-reliable channel is introduced; it is a set of communication channels along a set of paths. The /spl delta/-reliable channel meets the requirement that if a link or node fails, failure is limited to a maximum of /spl delta//spl middot/c (c/spl equiv/total capacity of the channels, and 0