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In cluster-based energy-harvesting wireless sensor networks (EH-WSNs), clustering schemes have been studied for prolonging the network lifetime. The EHGAF has been proposed to achieve this objective, however, this conventional scheme results in non-uniform residual power between cluster heads (CHs), leading to short network lifetime, under the conditions with geographical non-uniform energy-harvesting...
This work is focused on a technique providing the integration of the method of clustered voltage scaling (CVS) in the digital design flow. The efficiency of this technique in the case of a hashing unit IP-block is considered. In order to reduce the power consumption special hash algorithms (NH, PH) in combination with the CVS approach were proposed. For the implementation of the CVS technique a number...
Underwater sensor networks are bounded by data sensing, transmitting, and forwarding limitations. The transmitting of large volumes of data can require a large amount of time and power. This has led researchers to focus on the new technology of underwater computing systems, in which information is extracted under the water using embedded processors via data mining and/or data compression. In this...
In order to optimize the power consumption and improve the energy efficiency, the smart grid (SG) provides reliable, efficient and secured electrical power generation and distribution. Smart grid aims to manage and control the consumer demand and provide the needed power. Thus, in smart grid architecture, the information about power supply must be known, in advance, by the operator. This information...
With the quick advancement of the Internet, wireless communications have gotten remarkable consideration. Wireless sensor systems are outfitted with minor, essential batteries and along these lines it is important to plan vitality effective calculations to draw out the system lifetime. In remote sensor systems (WSNs), the sink versatility along an obliged mode can enhance the vitality proficiency...
In critical applications like military field, industrial safety methods, fire accidents and for particularly secured communications, many sensor nodes are used. These sensor nodes always maintain their battery power for a long time period so we can use a sleep scheduling method. Two known traffic paths are used for monitoring process. If an event occurs in a region, an alarm is carried through the...
Wireless sensor nodes operate on battery power and found very much energy constrained. Using dynamic power management, the sensor node components are operated at a desired power level or off to save the energy consumption and shorten the system activities to save power. Suitable queue discipline in collaboration with dynamic power management takes on a significant role in improvising the energy efficiency...
Wireless sensor network applications typically include various sensors (temperature, humidity, gas, etc.) and each sensor has different requirements of speed, noise, offset, and power consumption. In order to optimize the performance and allow long-time operation, reconfigurability is mostly desirable in the readout circuitry. In this paper, a reconfigurable time-domain comparator (RTDC) with low...
This paper aims to provide performance enhancement to our previously proposed simple autonomous active period selection scheme for cluster-tree based IEEE 802.15.4 beacon enabled WSNs under cluster mobility environments. The cluster mobility causes severe beacon collisions and greatly degrades the system performance. To enhance the system performance of WSNs with cluster mobility, this paper proposes...
In this paper, we aim at the optimal use of the scarce energy collected by a node powered by human energy harvesting in order to improve the provided Quality of Service (QoS). To achieve this goal, we have developed a Power-QoS control scheme, called PEH-QoS. PEH-QoS is composed of three sub-modules that interact with each other in order to make optimal use of energy and get the best possible QoS...
In this paper, we analyze the power consumption of wireless sensor nodes with min(N,T) policy and M/G/1 queue in the presence of Nakagami-m fading. In particular, this system setting is applied to a wireless sensor node operating in a cognitive radio system as secondary user in the presence of a primary user. As such, not only the queue policy influences the power consumption but also the interference...
To explore the energy efficient Machine-Type Communication (MTC) for 5G cellular systems, we developed a simulation platform to investigate the complete uplink procedures of energy-harvesting MTC devices in LTE-A (Long Term Evolution Advanced) system. Though the 3rd Generation Partnership (3GPP) has worked on LTE-A cellular standards in support of MTC transmission, the standards have not taken energy-harvesting...
This paper presents the design and simulation of the front-end low power transmitter for wireless sensor network application. The transmitter features simple circuitry with circuit techniques that reduce the power consumption and gives higher efficiency. The used modulation scheme is a modified version of ASK with better continuity to make it eligible for Wireless Passive Sensor Networks applications...
The conventional methods of improving the performance of wireless sensor network focus on proposed algorithm mechanism to increase the packet delivery ratio, reduce the delay and so on. In this paper, firstly we propose an adaptive sleep scheduled scheme to reduce the energy consumption of the whole network. Based on this, we introduce weight w to measure the importance of data. We assume that the...
This paper aims to provide performance enhancement to cluster-tree type IEEE 802.15.4 WSNs under cluster mobility environments. The cluster mobility causes severe beacon collisions and greatly degrades the system performance. To enhance the system performance of WSNs with cluster mobility, the paper proposes a combination scheme of the simple autonomous active period selection control and the traffic...
One of key attributes of WBAN is to extend the network lifetime, which can be achieved by adjusting the wakeup and sleep modes of the sensor nodes. Traditional low-power methods such as channel polling and periodic duty cycling are unable to satisfy WBANs requirements due to idle listening, collision, and control packet overhead problems. In this paper, we propose an RFID-enabled MAC protocol (RMAC)...
Certain Wireless Sensor Network (WSN) applications such as patient monitoring, smart grid, and equipment condition monitoring require accurate estimation of specific WSN parameters such as end-to-end delay, reliability and power consumption. The estimation of these parameters calls for an accurate and lightweight WSN model that is suitable for the low processing capabilities of sensor nodes. In this...
To prolong the lifetime of sensor nodes, most research works have focused on how to tune the duty cycling schemes among nodes to save the communication cost using multifarious wake-up strategies. To this aim, we propose a novel design strategy for mitigating average power consumption of sensor node using the Min(N, T) policy M/G/1 queuing theory. There is a heavy overhead for packet collisions and...
We propose a new MAC which promises deterministic packet transmission delay and highly reliable communication in a convergecast network. Our MAC provides a higher communication success ratio in both line of sight and non line of sight environment. We compared the performance of our MAC to contention based MAC using CSMA/CA.
We address the issue of network lifetime maximization for a special class of wireless sensor networks namely, wireless multi-media sensor networks. High data rates, in these networks at the sensor nodes, compared to the conventional sensor networks and the presence of high temporal correlation in the sampled data make them a suitable candidate for the in-network processing, primarily at the sensor...
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