A hybrid topology based multicast routing for cognitive radio ad hoc networks

Multicast routing, which disseminates traffic to several requesters simultaneously in a single transmission, has been widely utilized in mobile ad hoc networks. However, the performance of multicast routing can be constrained in cognitive radio ad hoc networks due to the channel instability caused by a primary user activity. To overcome this problem, we propose a hybrid topology based multicast routing, shortly called HyTopCast. Our HyTopCast utilizes available channel list and channel status information to make more stable multicast tree establishment and mesh topology based multicast route repair. The performance evaluation is conducted by OPNET simulator and HyTopCast shows the better performance than previous research in terms of packet delivery ratio and average end-to-end delay.