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

Abstract

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.

Cross-Layer QoS Scheme Based on Priority Differentiation in Multihop Wireless Networks

“…Proof. According to Lemma 4 in [18], similar to Theorem 3 in [16], the following inequality holds when = 0, 1, . .…”

“…The data channel is used for data communication. In this model scheduling will be subjected to the following constraints [16]:…”