Agent driven multi-constrained quality of service anycast routing in mobile ad hoc networks

Anycast routing provides a means to locate and communicate with anyone of a set of distributed destinations (servers) or service access points within a network. This paper considers finding Quality of Service (QoS) anycast path from client (source) to any one of the server in a Mobile Ad hoc Networks (MANETs) by using software agents. Proposed scheme Fuzzy QoS Anycast Routing (FQAR) operates in the following steps by integrating static and mobile agents. (1) Identification of single/multiple paths, and collection of status (residual bandwidth and link delay) of intermediate nodes from client to individual servers. (2) Inferring the QoS path from a set of multiple paths by using Fuzzy Inference System (FIS) where, FIS decision is dependent on residual bandwidth and link delay of the intermediate nodes and, (3) To maintain QoS anycast path, when path breaks due to mobility of node or due to link failure. To test the performance effectiveness of the approach, we have analysed the performance parameters like packet delivery ratio, end-to-end delay and control overhead. The scheme performs better as compared to route-count based anycast routing in wireless ad hoc networks.