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Femtocells are envisioned as a key solution to embrace the ever-increasing high data rate and thus are extensively deployed. Given that numerous femtocell access points (FAPs) deployed in ultra- dense networks (UDNs) lead to significant energy consumption, boosting their energy efficiency (EE) becomes an important issue to be addressed. However, most existing works either focus on homogeneous networks...
Substantial technology advances have been made in areas of autonomous and connected vehicles, which opens a wide landscape for future transportation systems. We propose a new type of transportation system, Public Vehicle (PV) system, to provide effective, comfortable, and convenient service. The PV system is to improve the efficiency of current transportation systems, \eg, taxi system. Meanwhile,...
Smart home, which controls the end use of the power grid, has become a critical component in the smart grid infrastructure. In a smart home system, the advanced metering infrastructure (AMI) is used to connect smart meters with the power system and the communication system of a smart grid. The electricity pricing information is transmitted from the utility to the local community, and then broadcast...
Smart home becomes an emerging research topic these years. It offers various advantages such as facilitating the control of home appliances and the reduction of electricity bill. In this paper, a dynamic programming based game theoretic algorithm is proposed for multiple user smart home scheduling which can handle home appliances with multiple discrete power levels. The simulation results on test...
Along with the development of high-speed railway in China, people require not only the safety and punctuality of the train, but also a higher demand for low energy consumption and comfort simultaneously. According to the situation, clonal selection algorithm is applied to the train control system to optimize the operation process of high-speed train. Through studying with the motion equation and constraint...
Recent years have witness booming interests of using wireless sensor networks (WSNs) for structural health monitoring (SHM). In a WSN, it has been widely regarded that wireless data transmission is one of the most energy consuming operations. To address the limitations of wireless sensor nodes in terms of power supply, in-network processing has been regarded as an effective way to decrease the energy...
The article was to grasp trends of energy consumption of village in southern Shaanxi province. Selecting Huangjiagou village of Mian county in Hanzhong city as the investigation base. Respectively, in January 2009 and July 2010, investigation was conducted in the area, tested indoor temperature and humidity of dwellings. Through analysis of the energy structure in the region, corresponding improvement...
Routing is an essential operation in wireless sensor networks. Most existing routing protocols are designed for homogeneous sensor networks. Recent studies show that a homogeneous sensor network has a poor fundamental performance limit. To achieve better performance, we adopt a Heterogeneous Sensor Network (HSN) model. In this paper, we present an efficient NEar-optiMal rOuting (NEMO) protocol for...
With the rapid progress of the whole computer technology, the wireless sensor networks gestated by the MEMS, wireless communication and low-consumption embedded technology construct the blueprint of the pervasive computing gradually for the people. This paper syncretizes the core thought of the context-aware technology and the WSN routing protocol with bringing forward the protocol CATRP adapting...
Due to uncertainties in target motion and limited sensing regions of sensors, collaborative target tracking in wireless sensor networks (WSNs) suffers from low tracking accuracy and lack of reliability when a target cannot be detected by a scheduled sensor. Generally, actuating multiple sensors can achieve better tracking performance but with high energy consumption. Tracking accuracy, reliability,...
MIMO (Multiple-Input-Multiple-Output) is a promising structure for wireless communication. While virtual MIMO structure has been proposed for distributed and cooperative wireless networks, this proposed structure has also put additional energy consumption where energy stands in the important position. At the same time, we have observed that this-problem-caused low energy nodes' mibehavior will degrade...
Wireless sensor networks (WSNs) play an increasingly important role in civilian and military settings. With the limited energy supply, sensor nodes do neither large calculations nor further transmissions. Data aggregation can reduce the redundancy of packets and save energy to prolong the lifetime of sensor networks. This paper proposes a novel mechanism for the delay-ranged feedback timing control...
A soft digital signal processing (DSP) design paradigm has been recently proposed to reduce the energy consumption of DSP systems through voltage overscaling. This paper shows that the selection of arithmetic unit structure can be an important and non-trivial issue in soft DSP system design. We present an optimal formulation and propose sub-optimal low-complexity approximations for selecting the appropriate...
The versatile usages of smart cards with embedded display present a rigorous need in manufacturability and reliability. To increase the reliability and decrease the final cost, the work calls for co-design of the whole system which means that engineers have to consider the packaging scheme at the earliest stage of prototyping. Furthermore, the requirement of Chinese character based display requires...
This paper is interested in applying voltage over-scaling (VOS) to reduce trellis decoder energy consumption, where the key issue is how to minimize the decoding performance degradation due to VOS-induced errors. Based on the fact that the integrity of different bits in the trellis state metric has (largely) different effect on the overall trellis decoding performance, we proposed an importance-aware...
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