84 / 2015-12-13 22:05:54

OCControl: A Novel Congestion Protocol for Oceanic Delay Tolerant Networks

DTN, congestion control, oceanic wireless networks

Because oceanic surface’s complex environments, such as varied weather conditions, and its easy reflection and refraction of wireless signals, Oceanic Wireless Communication Networks (OWCN) suffer low link quality and intermittent connectivity, which in turn disable the stability of end-to-end communication path. The above characteristics make oceanic wireless communication network a de facto Delay/Disruption Tolerant Network (DTN). Although numerous existing DTN congestion control schemes have been proposed, most of them assumed that link congestion rarely occurs, which is not true for oceanic wireless communication networks, because oceanic wireless communication networks are not typical DTN. For oceanic wireless communication networks, their transmission bottleneck lies in network links instead of network nodes. Therefore, we design a novel congestion control protocol for oceanic wireless communication networks, called OCControl, which borrow the idea of back-pressure routing. The experimental results have shown that OCControl effectively improves data transmission rate and greatly reduce transmission delay, compared with existing TCP/IP protocols.