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Delay-Constrainted Optimal Traffic Allocation in Heterogeneous Wireless Networks for Smart Grid

Siya Xu 1, Ningzhe Xing 2,3, Shaoyong Guo 1, Luoming Meng 1
1. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, 100876, Beijing, China
2. School of Electronic and Information Engineering, Beijing Jiaotong University, 100044, Beijing, China
3. State Grid Jibei Electric Power Company Limited Information & Communication Dispatch, 100053, Beijing, China

Abstract—In the smart distribution gird, various communication technologies are adopted to form a seamless heterogeneous communication network to deliver control and protection signals. However, most scheduling strategies designed for smart gird aim at optimizing system operation performance without considering the transmission cost. To address this problem, we construct a delay-constrainted cost optimization model to accomplish the following two goals: to optimize the cost and to satisfy QoS requirements. Firstly, we establish a queuing model according to the characteristics of heterogeneous services and output networks for smart grid. Then, a delay-constrainted optimal traffic allocation strategy is designed to dynamically allocate heterogeneous service data to different output networks. The allocation strategy herein is based on the Lyapunov theory. Finally, simulation results show that our proposed allocation strategy significantly reduces the cost and meets transmission delay constraints for all service traffic.

Index Terms—Smart distribution grid, cost, traffic allocation strategy, queuing model, Lyapunov theory, transmission delay

Cite: Siya Xu, Ningzhe Xing, Shaoyong Guo, and Luoming Meng, “Delay-Constrainted Optimal Traffic Allocation in Heterogeneous Wireless Networks for Smart Grid," Journal of Communications, vol. 10, no. 10, pp. 821-827, 2015. Doi: 10.12720/jcm.10.10.821-827