ACK signal based on-demand routing algorithm in Cognitive Radio Networks

The primary feature of cognitive radios (CR) for wireless communication systems is the capability to detect and rationally utilize spectrum opportunities (SOP), which realizes the effective use of spectrum resources. However, it brings some new challenges. Firstly, because of time-varying of SOP, making the network topology and routing are changing and need to establish and update at any time .In this paper; we propose the on-demand routing algorithm based the location of source and destination. Meanwhile, according to optimizing the relevant communication parameters given a dynamic wireless channel environment., we present the perceived parameters of surrounding environment on receiving node in the form of ACK frame are injected into RREP back to the sending node, which avoids the relevant problems caused by exchanging network state information (NSI). The effective node is selected by the environmental parameters resolved the ACK frames.