Performance Analysis of Mobile Content Delivery in Multiple Devices to Single Device Communication

Content caching at the terminal user device (UD) utilizing the device to device (D2D) communications is a promising technology to enhance the performance of mobile networks in terms of latency, throughput, energy consumption and so on. In this paper, a novel method of content delivery using multiple devices to single device (MDSD) communications through D2D links is presented. In this method, the Zipf distribution with exponent shape parameter is adopted to model the content caching popularity which affects the achievable signal to interference plus noise ratio (SINR). In order to investigate the advantage of the proposed MDSD method, firstly, a closed-form expression of the outage probability is theoretically derived for a single D2D communication to evaluate the success of content delivery to the UD. Secondly, the expression of the outage probability for MDSD communication is derived, where the outage probability is modeled as a function of content caching popularity, the density of UDs, and the size of cooperative area. The research work is further extended to address the frequency reuse among different UDs in one cell, where a frequency band factor is introduced, and the optimal radius of the cooperative area is defined and analysed. The analytical results are validated by the simulation results and show that the outage probability decreases drastically when the popularity of the content increases, or the radius of the cooperative area increases. Using the derived closed-form expression of the outage probability, the area spectral efficiency (ASE) of the system is presented. Furthermore, the results show that as the frequency band factor increases, the outage probability decreases. Finally, it is shown that the MDSD outperforms the single D2D-based method.

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Performance Analysis of Mobile Content Delivery in Multiple Devices to Single Device Communication

Abstract: The version in the Kent Academic Repository may differ from the final published version. Users are advised to check http://kar.kent.ac.uk for the status of the paper. Users should always cite the published version of record.

Cited by 3 publications

References 32 publications

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