The formation of virtual backbone network in manets based on cognitive radio

Abstract

In this paper, we propose a new algorithm adopting the spectrum sensing function of cognitive nodes, selections of cluster-heads and gateways can be made on the basis of dynamic information. Taking the cluster-head as anchor point, by choosing gateway nodes that are less affected by primary user in quest of connected dominating set, a virtual backbone network can be established. Based on the comparison of weights, through the sensing of the location of the primary user, the spatial distribution area of the cognitive nodes are divided and assigned different weights, thus realizing partition processing in the network. On one hand, it maintains relative stability of the sub-clusters in motion; on the other hand, it reduces the probability of interference links. In the end, and simulation results confirm the verification of the algorithm. © 2011 Springer-Verlag Berlin Heidelberg.