Modeling and Analyzing Multi-tier Millimeter/Micro Wave Hybrid Caching Networks

• DOI: 10.20944/preprints201806.0263.v1
• Publication Date: 2018-06-19T07:02:28Z
• Authors: Jihong Zhao; Shuyuan Zhao; Hua Qu; Gongye Ren
• Keywords: stochastic geometry; Multi-tier hybrid caching networks; 0202 electrical engineering, electronic engineering, information engineering; average successful delivery probability; Electrical engineering. Electronics. Nuclear engineering; 02 engineering and technology; millimeter wave; performance analysis; engineering_other; TK1-9971

In the fifth generation communication system, millimeter wave (mmWave) networks will coexist with traditional micro wave (μWave) networks, which allows for higher data transmission rate and better user experience. In this paper, we give a comprehensive framework of mathematical models and analytical methods for multi-tier mmWave and μWave hybrid caching networks based on stochastic geometry. We propose an association strategy by assuming average biased-received power association and Rayleigh fading. Accordingly, by using a D-ball approximating blockage model of mmWave networks, expressions of the cell association probability and the coverage probability of the hybrid networks are derived. Also, we use the average successful delivery probability as the performance metric to analyze the existing caching placement strategies. Simulation results validate the accuracy of our analytical conclusions.