An Data-Forwarding based channel condition acknowledgment for Cognitive Radio Mobility Based Routing

Abstract

This paper proposes an Data-Forwarding based multiple-channel selection scheme for CRMBR (Cognitive Radio Mobility Based Routing Protocol) [1] in CR enabled Mobile Ad Hoc Networks (CRMANET). Meanwhile in the new scheme, nodes along the route do not send ACKs in MAC layer for acknowledging successful transmission between two neighbors. Instead, the CR function allows the previous hop to understand the transmission results, together with the real time multi-channel conditions. This proposal significantly reduces the required bandwidth through ACK message suppression. Simulation results show that the feedback of multiple-channel conditions also benefits the channel selection mechanism before data transmission therefore improving the network throughput by around 5% compared to the traditional MAC ACK scheme in CRMBR.