Performance evaluation of coded meshed networks

Abstract

We characterize the performance of intra-and inter-session network coding (NC) in wireless networks using real-life implementations. We compare this performance to a recently developed hybrid approach, called CORE, which combines intra-and inter-session NC exploiting the code structure of the former to enhance the gains of the latter. We first motivate our work through measurements in WiFi mesh networks. Later, we compare state-of-the-art approaches, e.g., COPE, RLNC, to CORE. Our measurements show the higher reliability and throughput of CORE over other schemes, especially, for asymmetric and/or high loss probabilities. We show that a store and forward scheme outperforms COPE under some channel conditions, while CORE yields 3dB gains.

Opportunistic coding across on‐route dominating nodes in a flow‐orientedSDNenabledWSN

“…21 By adding a controller and detecting dominant nodes for the network backbone, congestion, end-to-end latency, and other performance issues are significantly addressed. 22,23 Furthermore, the controller exploits coding opportunities at dominant nodes to reduce transmission counts during communication in the network. Repeated packet encoding during transmissions through sensory nodes reduces packet delay which is demonstrated by Szab et al 24 In the literature, various applications of SDN-enabled WSN are deployed in a range of environments and confirmed the improvement in different evaluation metrics.…”

On the packet loss correlation in wireless mesh networks

“…ExOR is the first implementation of an opportunistic routing protocol [2], with the caveat that nodes should coordinate their action to avoid transmissions of redundant packets. To address this problem, MORE [3], CCACK [6], GeoCode [11], CORE [7], exploit random linear network coding (RLNC) to reduce the coordination between nodes.…”