Energy-awareness caching strategy in D2D communication networks

Abstract

In a cache-enabled device-to-device (D2D) communication network, the D2D device can download the corresponding content from the base station (BS) to its own local storage following certain cache storage policy. Then, the neighbouring users of one D2D device can access the required files through the D2D link to the device. Under this deployment, this paper introduces one energy-awareness caching strategies into the D2D communication to improve the caching performance. We proposed one branch-and-bound algorithm to process the cache matrix of the D2D nodes to improve weighted transmission latency of the system, which not only considers some characteristics of the social and physical nature of user nodes, but also takes energy-awareness into account. The branch-and-bound algorithm takes the user selfishness into consideration, and relates to users’ own energy reserves and the social nature. To validate the proposed caching strategy, we compare the proposed algorithm to the no-cache and random-cache schemes, while considering the transmission latency of the system performance, under different system settings.