The Routing Protocol Based on the Aggregation of Routing Table in Cognitive Ad Hoc Networks

摘要

In cognitive ad hoc network, how to effectively use the limited spectrum resources to improve the performance of wireless networks has become a hot topic in recent years. We present a new routing protocol based on AODV (ad hoc on-demand distance vector) routing protocol-ORT-AODV in cognitive ad hoc networks. Firstly, the routing table and the total delay calculations are introduced for the secondary user who needs to switch between bands frequently in cognitive ad hoc network. A particular emphasis is given to routing table pooling mechanism, which adds route information collected from different channel to the routing table. Moreover, intermediate nodes initiatively updating routing table mechanism is proposed to tell the source node that the route is available or not. Finally, the respective simulation results demonstrate that it could comply with the requirements of cognitive ad hoc networks, effectively improve the system throughput performance and decrease transmission delay simultaneously.