The Stable Routing Protocol for the Cognitive Network

Cognitive Network is one of the most prevailing development directions in the future network, prominent in enhancing the utilization of the network resource. Although the research on routing mechanism in Cognitive Network arises more attention in the recent years, the current mechanism provides limited methods for ameliorating the instability performance caused by the mobility of the Cognitive Radio Users. In this paper, we propose the Stable Routing Protocol (SRP), with Link Availability Prediction mechanism at the same time concerning the link quality and the traffic load for the nodes. SRP enables the Available Prediction mechanism for predicting the link available time and SRP prefers the link with longer available time. The longer link available time, the more stable the link is. In SRP, the senders broadcast the data packets in the medium, but the forwarders with longer available time, better link quality and light load possess the priority to relay the packets. Each sender in SRP tries to push the packet closer to the destination. The evaluation indicates that SRP performs better in terms of throughput and the end-to-end delay.