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The behavior of Wireless Sensor Networks (WSN) is nowadays widely analyzed. One of the most important issues is related to their energy consumption, as this has a major impact on the network lifetime. Another important application requirement is to ensure data sensing synchronization, which leads to additional energy consumption as a high number of messages is sent and received at each node. Our proposal...
In order to sustain a longer lifetime, an important research in the Wireless Sensor Network (WSN) is to improve power efficiency. Review of many technologies in the involvement, the essential idea is to remove power redundancy. The GAF algorithm is able to get a WSN with longer lifetime by reducing the node redundancy in transmitting data, On the other hand, the CODE, based on the GAF algorithm, is...
In this paper, the use of a centralized server to assist cognitive radio users in accessing bands in licensed spectrums is proposed. Typical cognitive radios are opportunistic users of spectrum bands. Therefore, they must scan the spectrum to detect existing users in order to avoid interference. The use of a centralized server can remove the need for spectrum scanning if all users inform the server...
This paper deals with global power consumption modeling dedicated to Wireless Sensor Network (WSN) nodes. After having introduced various existing approaches for the energy modeling, our choices and experiments using the Ns-2 simulator and the iMote2 hardware platform (over an IEEE 802.15.4 protocol) are presented. First results show that Ns-2 simulator provides RF energy consumption metrics very...
The research area of Wireless Sensor Networks (WSN) is growing rapidly. WSN technology is making entrance into new application areas, for example industrial control and Critical Infrastructure (CI) environments. Energy efficiency is a highly prioritized goal of communication protocols and application design for WSN. However, the usage of WSN in both industrial and CI environments are starting to require...
This article presents the hardware software co-optimized implementation of the IEEE 802.15.4 protocol for a Wireless image Sensor Network (WiSN) node SoC. In order to to minimize the power consumption and hardware software implementation cost, a power and cost aware partition scheme is introduced. Then the optimized hardware accelerator is designed and validated with software driver/stack based on...
The high energy consumption in the local network often leads to energy hole problem in wireless sensor networks (WSNs), It easy to make the WSNs dying prematurely. The effective way is the evenness of energy consumption of each node. Unlike other existed schemes, we sliced the circular field into concentric circular bands of fixed width. By combining the direct transmission protocol and hop-by-hop...
Mobile sink brings new challenges to densely deployed and large wireless sensor networks (WSNs). When the sink moves, frequent location updates from the sink can generate excessive power consumption of sensors. In this paper, we propose IAR, an Intelligent Agent-based Routing protocol that provides efficient data delivery to mobile sink. Proposed algorithm reduces signal overhead and improve degraded...
The ZigBee which is a type of the sensor networks defines a role of the Trust Center, so it securely communicates through the key distribution. But the key distribution through the Trust Center concentrates all traffic from the Trust Center, so it occurs a delay and an overhead. In this paper, we design a key distribution scheme for secure communication in the wireless sensor networks. It is designed...
Wireless sensor networks (WSNs) have many applications in home and industrial automation, and the management and integration of WSNs into Internet and IP-based networks is still getting tremendous interesting. This paper presents a micro SOA-model as part of a 4-layered, SOA-based architecture targeting resource-constrained devices with 48 KB of ROM and 10 KB of RAM. The key idea in this model is...
Wireless Sensor Networks (WSNs) are being gradually introduced in different application scenarios. One of the main constraints for their deployment is energy consumption, as sensor nodes are usually stand alone battery-powered devices. For this reason, most efforts in research are being focused in energy-aware architectures and protocols. To aid in this search of most energy efficient strategies,...
This paper presents the problem of minimizing energy consumption and maximizing lifetime in a many-to-one sensor network. In such network pattern, all sensor nodes generate and send data to a single and fixed base station (BS), via multi-hop transmissions. When all the sensor data have to be forwarded to a single BS via multi-hop routing, the traffic pattern is highly non-uniform, putting a high burden...
The detector is mainly composed of CC430F5137, Lithium battery, Voltage monitor chip, temperature sensor, CO sensor and smoke detector, etc,. The detector is improved via the design optimization of hardware and software, which greatly reduces power consumption. Contemporarily, the detector uses BP algorithm program for judging whether there is a fire in the detect area. BP algorithm program is embedded...
Routing is critical in wireless sensor networks (WSNs). It has been widely studied in recent years and many new protocols have been proposed. In this paper, based on observations on event-driven wireless sensor networks, we propose algorithms to reduce power consumption and improve data quality in wireless sensor networks. In our algorithms, sensor nodes reduce the sampling frequency and number of...
The use of wireless industrial field devices (sensors and actuators) is gradually increasing. The easy installation and repositioning of these devices are the greatest motivators of this tendency. On the other hand, wave propagation phenomena, radio frequency coexistence and energy consumption are inherent difficulties that must be taken into account. The applied wireless communication protocol must...
A wireless bipolar body electrode has been developed, taking into account the limitations posed by signal-to-noise ratio, dimensions, wireless technology, limited power consumption and requirements for post-processing. A small set of wireless bipolar electrodes, placed at optimal locations on the body surface, are connected into a network that is able to acquire real-time data. Measured signals, sampled...
In wireless sensor networks, battery life is a key resource that must be conserved as much as possible. Nowadays, the main way of achieve power saving in this type of circuits is to implement low-power RF (Radio Frequency) circuitry and network protocols that try to minimize the number of transmissions by the air. We think that adaptation to RF environment can minimize the power consumption and supply...
Mobile sink brings new challenges to densely deployed and large wireless sensor networks (WSNs). When the sink moves, frequent location updates from the sink can generate excessive power consumption of sensors. In this paper, we propose IAR, an Intelligent Agent-based Routing protocol that provides efficient data delivery to mobile sink. Proposed algorithm reduces signal overhead and improve degraded...
Wireless sensor network (WSN) consists of tiny sensor nodes with sensing, computation and wireless communication capabilities. Now a days, it is finding wide applicability and increasing deployment, as it enables reliable monitoring and analysis of environment. The design of routing protocols for WSN is influenced by many challenging factors like fault tolerance, energy efficiency, scalability, latency,...
Sensor Networks consist of massively distributed, small devices that have some limited sensing, processing, and communication capabilities. Due to the design of the topology of Sensor Networks, supporting energy-efficient routing protocol in the sensor networks is a challenging task. In this paper, we propose a Density and Distance based Cluster Head Selection (DDCHS) algorithm. The proposed algorithm...
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