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Wireless Sensor Networks (WSN) is a powerful technology that can be used in many application domains varying from geology surveillance to medicine healthcare. However, current protocols for WSN are not suitable to handle the WSN applications with high mobility of sensor nodes. In this paper, we present a protocol named CIVIC designed for Vehicular Ad-hoc Network. This protocol is based on one-hop...
Energy efficiency is a vital aspect of resource constrained wireless sensor networks (WSNs). All protocols designed for WSNs must be energy aware in order to prolong the network lifetime. In this paper, we have designed a novel MAC layer protocol (I-MAC: Intelligent MAC) for WSNs. By exercising intelligent sleep and wake-up schedule, I-MAC saves energy of the resource constrained sensor nodes greatly...
In this paper, we discuss a fairness energy algorithm for the M2M renewable network. The algorithm mainly contains the flow control and transmission strategy and has low computational complexity. The aim is to reach an asymptotically optimal average network performance while keeping the fairness among nodes.
In this paper, the energy efficiency of cooperative ARQ transmission in Amplify-and-Forward (AF) relay networks is discussed. The average total energy consumed per bit for cooperative ARQ under Quality of Service (QoS) constraints is formulated. With numerical method, the objective is optimized over the transmission data rate, the transmit power of the source and the relay, given fixed maximum retransmission...
An ad-hoc network is the cooperative engagement of collection of mobile nodes without the required intervention of any centralized access point or exiting infrastructure. The need for an efficient routing protocol in mobile ad hoc network is widely proclaimed. A lot of routing protocols have been proposed. They are categorized into three parts according to the way how their routing tables are constructed:...
Wireless sensor networks are widely used for healthcare applications. A new field known as wireless body area networks (WBAN) has emerged to support this area. An energy efficient medium access control (MAC) protocol can increase the performance of such a network. The major requirements for a WBAN MAC protocol are energy efficiency and low delay. In this paper, we propose a MAC protocol for WBAN using...
We consider the problem of failure management in wireless sensor networks (WSN). In such networks, nodes can be subject to frequent failures due to energy depletion and the hostile deployment environment. Our work focuses on local crash process detection in WSN considering intermittent failures due to lossy radio links. As a part of this problem, we introduce a new type of Adaptive Neighborhood Failure...
Japanese government has limited CO2 emissions and energy consumption for enterprises for these years. Especially, Japanese manufacturing industry have to fight to reduce energy consumption because they consumes a large amount of energy. Meanwhile, productivity must be kept when reducing energy consumption in manufacturing. The paper proposes the method of health monitoring with considering transparent...
Technology of wireless sensor networks has grown thanks to technological developments in different areas related to microelectronics. However, to become truly ubiquitous, these networks must overcome a number of challenges such as resource constraints (energy, memory, etc.), quality of service (bounded transmission delays), etc. It follows that the energy conservation and latency minimization are...
In this paper, we present a low energy image processing system design based on efficient accuracy-energy tradeoffs. The proposed design allows aggressive voltage scaling in the presence of process variation by employing an error concealing method based on the inherent error tolerance of digital signal processing applications. Based on a system-level analysis, we demonstrate that significant energy...
We study the rendezvous data collection problem for the mobile sink in wireless sensor networks. We introduce to jointly optimize trajectory planning for the mobile sink and workload balancing for the network. By doing so, the mobile sink is able to efficiently collect network-wide data within a given delay bound and the network can eliminate the energy bottleneck to dramatically prolong its lifetime...
The energy consumption of ICT infrastructures has increased considerably in the recent years. This has resulted in extensive research on dynamic power management strategies as well as data centre design and placement. The main problem with most of the proposed or existing approaches is that they do not fully take the distributed nature of and strong logical dependencies between executed services into...
This paper presents a novel sum of absolute difference (SAD) scheme that significantly reduces the energy consumption of the motion estimation kernel in video coders. The proposed scheme exploits the facts that most of the absolute difference (AD) calculations result in small values, and most of the large AD values do not contribute to the SAD values of the blocks that are selected. Thus the large...
Wireless sensor networks are formed by a great deal of sensor nodes, which are generally battery-powered and may not be recharged easily. Consequently, how to save energy is an important issue when designing protocol in wireless sensor network. However, lowering the energy consumption may result in higher latency. To address such a tradeoff, this paper proposes a MAC protocol supported dynamic contention...
In order to achieve higher bandwidth and higher throughput, the carrier aggregation (CA) technique has been adopted by the specifications of 3GPP Release 10 for Long Term Evolution (LTE) advanced systems, where the user equipment (UE) may operate over up to 5 component carriers (CCs). On the other hand, 3GPP specifications also define a mechanism named discontinuous reception (DRX) in order to save...
Real-time data delivery to a multicast group may be defined as data dissemination to each member in the multicast group within the desired time deadline. The hardest part of this mission is to enforce this real-time constraint in the communication between a source and the furthest member since an end-to-end delay is proportional to a physical distance in wireless sensor networks. We may call it the...
Demand side management (DSM) provisions have still large potentials in the residential sector. In the paper, a model of the residential customer's demand using a bottom-up approach, implemented in a load simulator, has been used in order to evaluate the impact of DSM actions on Italian average households' daily load shape. To this aim, some more diffuse demand management options have been simulated...
Fiber-Wireless (FiWi) is the hybrid architecture of access networks. Since large amount of energy consumption of internet is due to the access networks, so in this paper Green FiWi (GFiWi) algorithm is proposed that switches the nodes of FiWi access networks to sleep mode in order to reduce energy consumption of FiWi networks not only at the optical but also at wireless part of FiWi. Simulation results...
Resource-constrained is a critical issue in Wireless Sensor Networks (WSN) applications. Data aggregation (or data fusion) is one of the key techniques to solve the problem. Data aggregation can effectively reduce the data traffic, thereby reduce energy consumption, and extend the network's survival time. The research of data aggregation relates to many aspects of technology, so that the design of...
In order to prolong the lifetime and reduce the transmission delay of Wireless Sensor Networks (WSNs), we propose a novel Hierarchical Routing Protocol based on Dynamic Weight (HRPDW) for WSNs. In our HRPDW, first considering the important parameters of both residual energy and transmission delay, we set the dynamic weight; second, every sensor node stores the dynamic weights of its several adjacent...
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