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Journal of Electrical and Computer Engineering
Volume 2016, Article ID 5762851, 10 pages
Research Article

Cross-Layer Control with Worst Case Delay Guarantees in Multihop Wireless Networks

Communication Research Center, Harbin Institute of Technology, Harbin 150080, China

Received 15 December 2015; Accepted 6 June 2016

Academic Editor: Vinod Sharma

Copyright © 2016 Shu Fan and Honglin Zhao. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The delay guarantee is a challenge to meet different real-time requirements in applications of backpressure-based wireless multihop networks, and therefore, researchers are interested in the possibility of providing bounded end-to-end delay. In this paper, a new cross-layer control algorithm with worst case delay guarantees is proposed. The utility maximization algorithm is developed using a Lyapunov optimization framework. Virtual queues that ensure the worst case delay of nondropped packets are designed. It is proved through rigorous theoretical analyses and verified by simulations that the time average overall utility achieved by the new algorithm can be arbitrarily close to the optimal solution with finite queue backlogs. The simulation results evaluated with Matlab show that the proposed algorithm achieves higher throughput utility with fewer data dropped compared with the existing work.