On minimizing energy consumption for D2D clustered caching networks
Amer, Ramy; Butt, M. Majid; ElSawy, Hesham; Bennis, Mehdi; Kibiłda, Jacek; Marchetti, Nicola (2019-02-21)
R. Amer, M. M. Butt, H. ElSawy, M. Bennis, J. Kibilda and N. Marchetti, "On Minimizing Energy Consumption for D2D Clustered Caching Networks," 2018 IEEE Global Communications Conference (GLOBECOM), Abu Dhabi, United Arab Emirates, 2018, pp. 1-6. doi: 10.1109/GLOCOM.2018.8647532
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https://urn.fi/URN:NBN:fi-fe2019061019665
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Abstract
We formulate and solve the energy minimization problem for a clustered device-to-device (D2D) network with cache-enabled mobile devices. Devices are distributed according to a Poisson cluster process (PCP) and are assumed to have a surplus memory which is exploited to proactively cache files from a library. Devices can retrieve the requested files from their caches, from neighboring devices in their proximity (cluster), or from the base station as a last resort. We minimize the energy consumption of the proposed network under a random probabilistic caching scheme, where files are independently cached according to a specific probability distribution. A closed form expression for the D2D coverage probability is obtained. The energy consumption problem is then formulated as a function of the caching distribution, and the optimal probabilistic caching distribution is obtained. Results reveal that the proposed caching distribution reduces energy consumption up to 33% as compared to caching popular files scheme.
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