  Mobile ad-hoc network (MANET) is a dynamic collection of mobile computers
without the need for any existing infrastructure. Nodes in a MANET act as hosts
and routers. Designing of robust routing algorithms for MANETs is a challenging
task. Disjoint multipath routing protocols address this problem and increase
the reliability, security and lifetime of network. However, selecting an
optimal multipath is an NP-complete problem. In this paper, Hopfield neural
network (HNN) which its parameters are optimized by particle swarm optimization
(PSO) algorithm is proposed as multipath routing algorithm. Link expiration
time (LET) between each two nodes is used as the link reliability estimation
metric. This approach can find either node-disjoint or link-disjoint paths in
single phase route discovery. Simulation results confirm that PSO-HNN routing
algorithm has better performance as compared to backup path set selection
algorithm (BPSA) in terms of the path set reliability and number of paths in
the set.
