Delay Optimization and Cross-Layer Design in Multihop Wireless Networks With Network Coding and Successive Interference Cancelation - 2015


Network coding (NC) and multipacket reception with successive interference cancellation (SIC) have been shown to boost the performance of multihop wireless networks (MWNs). However, previous work emphasised maximization of network throughput while not considering quality of service (QoS) requirements, which could lead to high packet delays within the network. The objective of this work is minimization of packet delay in a very TDMA-based MWN that is jointly utilizing NC and SIC techniques for a given traffic demand matrix. We assume conflict-free scheduling and allow multipath routing. We tend to formulate a cross-layer optimization that assigns time slots to links in a means that the average packet delay is minimized. The problem formulation results in a difficult mixed integer nonlinear programming (MINLP) that the state-of-art software can solely solve for terribly little-sized networks. For massive networks, we develop a heuristic approach that iteratively determines the optimal answer. We tend to gift numerical results, which show that the average packet delay and traffic handling capability of a network, using w/o NC+SIC, NC, SIC and NC+SIC schemes, improves from left to right. The traffic capacity of NC+SIC is double of the w/o NC+SIC. Thus, combined utilization of NC and SIC techniques results in important performance improvement.

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