Prediction-Based Cross-Layer Resource Allocation for Wireless Multi-Hop Networks with Outdated CSI

Wei FENG  Suili FENG  Yuehua DING  Yongzhong ZHANG  

IEICE TRANSACTIONS on Communications   Vol.E97-B   No.4   pp.746-754
Publication Date: 2014/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E97.B.746
Type of Manuscript: PAPER
Category: Network
wireless multi-hop networks,  outdated CSI,  channel prediction,  cross-layer resource allocation,  distributed algorithm,  

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The rapid variation of wireless channels and feedback delay make the available channel state information (CSI) outdated in dynamic wireless multi-hop networks, which significantly degrades the accuracy of cross-layer resource allocation. To deal with this problem, a cross-layer resource allocation scheme is proposed for wireless multi-hop networks by taking the outdated CSI into account and basing compensation on the results of channel prediction. The cross-layer resource allocation is formulated as a network utility maximization problem, which jointly considers congestion control, channel allocation, power control, scheduling and routing with the compensated CSI. Based on a dual decomposition approach, the problem is solved in a distributed manner. Simulation results show that the proposed algorithm can reasonably allocate the resources, and significantly improve the throughput and energy efficiency in the network.