Abstract
This chapter discusses the data flow in network systems in the event of failures. As these failures cannot be entirely avoided, there is a need to design a system that will survive network failures. In this chapter, using a flow network model, the design of a reliable communication channel with well-specified network survivability performance is described. There are two approaches for constructing reliable communication channels: stochastic and deterministic. The deterministic approach, in which performance in the event of link or node failure is designed to exceed a predetermined level, is considered. This approach is classified as a survival method and a restoral method. The survival method is for confirming the deterministic lower bound of the channel capacity in the event of link or node failure, while the restoral method is for reserving a restoral channel.
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