Fuzzy routing

Most older routing strategies are analytical in naure and therefore can, due to complexity reasons, only consider one or two input parameters. During the last years there is a general tendency to take into account more parameters using non-analytic methods to master the complexity. Fuzzy logic is an excellent heuristic method to come to grips with the complexity problem in communication and computer networks. Two examples show the use of fuzzy logic to routing; first the authors will show the use of explicitly available information in the form of routing tables, then they will show the use of implicitly available information in the form of experience and heuristic knowledge in distributed networks.