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At present, the user experience provided by smart mobile terminals is limited to the battery capacity. This paper focuses on how to improve the energy efficiency of terminals in OFDMA-based wireless multicast systems with frequency-selective channels. We assume that multicast terminals can switch to sleep mode during the transmission of some OFDM symbols according to their OFDMA frame-level quality...
Energy efficiency of cloud computing attracts a great deal of attention recently more than ever. In this paper, based on the characteristics of virtualized cloud environment and MapReduce workload, an energy efficiency management method called EECLOUD is presented. The method involves two strategies: VM allocation and dynamic VM placement strategies. The VM allocation strategy aims at maximizing an...
This paper addresses power allocation issues for amplify-and-forward (AF) two-way relay systems. Based on theoretical derivation, we first propose an energy-efficient power allocation (PA) strategy for 2-phase and 3-phase two-way systems with single relay or multi-relay, under a certain transmission data rate of source nodes, aiming to minimize the system energy consumption. Numerical results show...
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