A Node-Disjoin Multipath routing in Mobile Ad Hoc Networks

A Mobile Ad Hoc Networks (MANETs) is a collection of mobile nodes that can communicate with each other using multihop wireless links without utilizing any fixed based station infrastructure and centralized management. It is very necessary for MANETs to have an efficient routing and quality of service (QoS) mechanism to support diverse applications. Multipath routing allows the establishment of multiple paths between a single source and single destination node. This paper discusses the Multipath routing problem of MANETs with multiple QoS constraints, which may deal with the delay, bandwidth and reliability metrics, and describes a network model for researching the routing problem. It presents a Node-Disjoint Multipath routing protocol with multiple QoS constraints (NDMRP). The NDMRP successfully solves the QoS routing problems when nodes change dynamically in the networks. It only requires the local state information of the link (or node), but does not require any global network sate to be maintained. It can effectively decrease the overhead for the network lifetime, and improve the success ratio of seeking links. Simulation results show that the NDMRP provides an available means to implement routing, and adapt to all kinds of the topology networks, and have better expansibility.