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Energy-efficiency and location accuracy are two important performance metrics for indoor localization systems. However, typical indoor localization schemes based on WLAN cut gravely down smart device lifetime due to large energy consumption of scanning around wireless access points. In this paper, for the purpose of decreasing the amount of energy consumption while guaranteeing localization accuracy,...
Small cell is a flexible solution to satisfy the continuously increasing wireless traffic demand. In this paper, we focus on on-off switch operation on small cell base stations (SBS) in heterogenous networks. In our scenario, the users can either choose SBS when it is active or macro cell base station (MBS) to transmit data. Start-up energy cost is considered when SBS switches on. The whole network...
In this paper, we focus on the energy consumption problem in heterogeneous networks with on-off switch operation for small cell base stations (SBS). In our scenario, the users in the small cell can either choose SBS when it is awaken or macro cell base station (MBS) to transmit data. The start-up cost is considered when SBS switches on. We suppose both the transmission power and the users' number...
The energy consumption of a WBAN system can be divided into three parts: transmitting, sensing and channel switching. Considering the fact that the WBAN system are power-supply limited, the energy-efficient spectrum handoff schemes have been proposed by many previous works, aiming at extending the endurance life of a WBAN system. In this paper, we consider a WBAN system which access multiple PU channels...
The cointegration relationship between demand and price of the primary energy in China is tested. The results show that the long-run equilibrium exists between demand and price of the primary energy which is contradictory to the demand theorem. The main reason for the contradiction is analyzed as follows: state control of the energy price, irrational present energy price system, low percentage of...
More and more attention is paid for energy consumption aware and power control for data center with the emergency of energy crisis. The use of virtualization technology makes it possible for dynamic configuration of data center resources. The N:1 mapping visualization technology is employed to integrate many physical machines into an virtual resource pool to control resources centralized, and then...
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