An Efficient Multi-path Routing Scheme for Cognitive Ad-Hoc Networks

Ulti-path routing protocol is a way to improve the reliability of connections in cognitive radio networks with supporting the quality-of-service (QoS) communications. In this paper, we consider the probability of spectrum hole unoccupied by PUs and allocating every link channel, namely multi-path QoS routing protocol in cognitive radio networks. Our proposed scheme of multi-path routing protocol for cognitive radio networks must account the probability of spectrum hole unoccupied by PUs, data throughput and QoS. Our QoS multi-path routing protocol determines the expected transmission bandwidth calculation and bandwidth allocation at the destination. Our protocol collects link probability of spectrum hole unoccupied by PUs information from source to destination in order to calculate all paths expected transmission bandwidth with the information of link bandwidth at the destination. To satisfy a given bandwidth requirement for primary users who are serious interfering the factors, the bandwidth calculation of the QoS multi-path are determined at the destination to accurately determine the QoS multi-path depending on the status of network bandwidth.