Minimum spanning tree-based multicast routing protocol for dynamic spectrum access networks: A multi-layer probabilistic approach

In this paper, we propose a multi-layer multicast routing protocol for multi-hop mobile ad hoc cognitive radio (CR) networks. The proposed protocol employs a probabilistic approach in performing the channel assignment and path selection process based on the concept of minimum spanning tree (MST). Our protocol accounts for the unique features of CR operating environment. Simulations experiments are conducted to investigate the effectiveness of the our protocol under various network conditions in terms of network throughput and packet delivery rate. Compared with reference CR multicast protocols, simulations results show that our multi-layer multicast protocol signif cantly improves network performance.