Abstract
Due to the constantly changing sea surface, there is a high risk of link fragility caused by sea waves when different marine users are intended to establish stable links for communication. To ensure stability with less delay, finding a stable route is one of the crucial aspects of maritime networks. In order to achieve this aim, we propose a routing protocol for cognitive maritime networks based on software-defined networking (SDN). This SDN-based cognitive routing protocol provides stable routes among different marine users. To provide the global view of the whole network, a main controller is placed close to the seashore, whereas the localized views are provided by the cluster heads. Autonomous surface vehicles are used as gateways under sparse network conditions to collect and transport data among clusters, and to and from the main controller. This is an SDN-based ship-to-ship communication scheme where two ships can only establish a link when they not only have consensus about a common idle channel but are also within the communication range of each other. We perform extensive simulations to test the proposed scheme with different parameters and find better performance in comparison with both SDN-based and non-SDN-based schemes in terms of end-to-end delay, packet delivery ratio, and routing overhead ratio.
Highlights
Maritime networks have been playing a crucial role in dealing with various applications, ranging from ship safety and security to all commercial applications for passengers [1]
A new routing scheme is proposed in this article for cognitive radio software-defined maritime networks
The scheme is novel in the sense that we are the first who combine both cognitive and routing technologies in software-defined maritime networks
Summary
Maritime networks have been playing a crucial role in dealing with various applications, ranging from ship safety and security to all commercial applications for passengers [1]. This is a technology where ships, surface buoys, autonomous surface vehicles (ASVs), and large vessels communicate with each other by joining and departing from the network in a dynamic manner, thereby forming an ad hoc maritime network This type of marine communication has a high risk of fluctuations in signal strength due to constantly varying sea waves which results in links fragility; providing stability with an adequate routing scheme is a major issue in a marine environment. The technique includes ASVs for relaying data between marine users close to the seashore and far out at sea (ii) To deal with the issues of limited services collectively in view of the high cost of satellite links, spectrum insufficiency, and large latency, we are the first to consider SDN in combination with cognitive and routing technology in the marine environment.
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