Optimization Scheme for Multi-User Video Transmission Over MIMO Multi-Hop Wireless Networks
Zhang Xing · 2013
MIMO(multi-input multi-output),a promising technology that hopes to improve reliability and bandwidth of wireless networks,has been widely deployed.However there has been little literature that describes how to provide high-quality video service for multi-user over MIMO multi-hop wireless networks.The co-channel interference among multiple wireless links is one of the critical issues.This paper proposes a scheme for multi-user video transmission over multi-hop wireless networks and combats with interference by employing link selection,spatial multiplexing and spatial diversity gain of MIMO.Furthermore,the study formulates this scheme as an optimization problem,which is a NP-hard problem.To make it suitable for practical implementation,the study employs a modified genetic algorithm to solve the link selection problem.Moreover,according to the characteristics of scalable video and MIMO,the antenna grouping problem is transformed into one 0/1 knapsack problem.The depth first search and branch bound techniques are used to further reduce the searching range.The study demonstrate the effectiveness of the proposed scheme by extensive experiments.