Many-to-one D2D for content delivery in cellular networks
by Xiaoyan Zhao; Lilin Fan; Zhan'ao Xue; Peiyan Yuan
International Journal of Wireless and Mobile Computing (IJWMC), Vol. 14, No. 1, 2018

Abstract: The widespread expansion of mobile multimedia traffic results in a tremendous slowdown, or even breakdown in cellular networks. Cache-enabled Device-to-Device (D2D) communication can be employed as a potential solution against the performance degradation. In this paper, we propose a many-to-one D2D communication model to carry on content delivery, which takes full advantage of storage redundancy in dense network scenarios. We study the minimisation problem of transmission delay and introduce the queuing mechanism of multi-server to derive the queue length for the number of D2D requesting users (RUs). Considering the cumulative interference caused by multi-pair D2D communications in the uplink period, restricted zone of D2D communication is defined to guarantee the quality of main link communication. Furthermore, the non-outage probability is deduced to analyse the system performance. Numerical simulations show that our system yields significantly greater throughput by one or two orders-of-magnitude in realistic settings, while transferring traffic load of the base station reasonably.

Online publication date: Mon, 26-Feb-2018

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