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In this paper we analyse the energy efficiency of MQAM and MFSK for short range wireless transmissions, up to a few 100's of meters, and propose optimum rate adaptation to minimize the energy dissipation during transmissions under different channel environment. Energy consumed for transmitting the data over a distance to maintain a prescribed error probability together with the circuit energy have...
It is a very important topic to reduce network energy consumption for constructing green network in current computing area. Rate adaptation of network device provides an effective approach to optimize network energy consumption and improve network energy efficiency. In this paper, we propose a global optimization approach for network energy efficiency based on rate adaptation. According to the characteristics...
GPU-enhanced clusters as mainstream components in the HPC field are expected to be heterogeneous in system layer and node layer as the evolvement of processing elements (CPUs and GPUs) and the expansion of nodes. In this paper, we proposed a flexible energy efficient task scheduling scheme for heterogeneous tasks in the heterogeneous GPU-enhanced clusters. A system model and a task model for the heterogeneous...
Sustaining green communications in digital data transmission is gaining prime importance, as the 24/7 access networks contribute large electrical power consumption. Presently, the increased number of digital transactions in most of the enterprise network (EN) tremendously increases the volume of data transmitted through out the EN at all the time that would increase the electrical power consumption...
In this paper, an energy efficient adaptive modulation scheme is proposed for a wireless cognitive radio ad hoc network, where each node is equipped with cognitive radio and the network is an OFDMA system operating on time slots. In each slot, the users with new traffic demand will sense the spectrum and locate the available subcarrier set. Then they choose subcarriers with favorable channel condition...
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