Interference Aware Cooperative Routing Algorithm

As a effective way to overcome the channel fading and improve transmission capacity and reliability,as well as an effective way to extend communication range even reduce energy consumption,cooperative communication has attracted many research interests in recent years.However,in a complex multi-stream environments,the higher interference caused by coopera-tive nodes and the severe co-channel interference caused by multi-hop making the transmission efficiency decline.In multi-interface multi-channel wireless networks,each wireless node can be equipped with multi-interfaces.Existing studies show that,compared with single inter-face network,multi-interface multi-channel network can improve the transmission performance while reduce the co-channel interference.However,research work in this area mainly focused on single interface wireless network,even seldom use multi-interface multi-channel resources to reduce the interference.Thus,it is high time to study the scheme considering the effects of interference under the multi-interface multi-channel cooperative network.Therefore,taking ad-vantage of both multi-radio multi-channel technique and cooperative communication this paper focus on these two issues with in-depth research,the main work and innovation points are as follows:1.In order to solve the cooperative routing problem in multi-interface multi-channel wire-less network,this paper first proposes a novel interference-aware-cooperative-routing metric IRoutM,and then proposes a joint scheme of cooperative routing and channel assignment in multi-flow and multi-hop wireless networks,named JCRCA.JCRCA exploits the capability of multiple interfaces and multiple channels to reduce the interference in order to achieve higher cooperative diversity gain.The extensive simulation results demonstrate that our proposed JCR-CA can well reduce the interference,effectively improve the network throughput and reduce the end-to-end transmission delay.2.Aiming at to resolve the issue of mobile nodes in a cooperative wireless network,we proposes a maintenance algorithm oriented to cooperative routing with taking the mobility of both the normal nodes and the cooperative relay nodes into consideration.This algorithm in-clude two route repair strategies for common nodes and relay nodes respectively,which ensure the repair of link can be timely and effective and the overhead of the network can be reduced.And the last experiments show that our proposed routing algorithm JCRCA can improve the network throughput and reduce the end-to-end transmission delay effectively,at the same time,it can dynamic adjustment of the network adaptively and reduce the routing overhead,enhanced routing robustness and maintainability.Above all,this paper make full use of multi-interface multi-channel resources,and stud-ies the corresponding cooperative routing technology to improve the network performance of the wireless network in order to meet wireless users with stable demand for high-bandwidth network services.