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COGNITIVE RADIO-AWARE TRANSPORT PROTOCOL FOR MOBILE AD HOC NETWORKS?

By Admin on

COGNITIVE RADIO

                        Allowing secondary users to choose an available channel from among a wide spectrum range thus enables reliable communication in this context, but communication characteristics such as bottleneck bandwidth and RTT will change with channel switch. In response to this change, TCP has to adaptively update its congestion window (cwnd) to make an efficient use of the available resources. For this purpose, TCP CRAHN was proposed for CogMANET. In this paper, TCP CRAHN is first evaluated in cases where bottleneck bandwidth and RTT drastically change. Based on these results, TCP CoBA is proposed to further improve the throughput of the above use cases. TCP CoBA updates the cwnd based upon the available buffer space in the relay node upon channel switch, as well as other communication characteristics.


COGNITIVE RADIO-AWARE TRANSPORT PROTOCOL FOR MOBILE AD HOC NETWORKS

                                         Cognitive radio technology has the potential to ameliorate the scarcity of wireless resources because unlicensed users (secondary users: SUs) can use wireless resources only if they have no impact on the operations of licensed users (primary users: PUs). In the future, cognitive radio mobile ad hoc networks (CogMANET) will be constructed from many mobile SUs connected to each other in a distributed manner, which can be deployed for various applications, including intelligent transport systems (ITS).


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