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Wireless Sensor Networks (WSNs) are gaining much importance due to their varied characteristics and the ease with which they can be implemented in various environments to suit different purposes. The sensor nodes which are the main components of WSNs are typically battery equipped and difficult to recharge. Hence, the primary concern while designing such networks is to reduce the overall power consumption...
Mobile Ad hoc Networks (MANETs) are the networks of mobile nodes which do not require any access points to communicate with each other within the radio range. Due to their applications in situations such as emergencies, crisis management, military and healthcare, message security is of paramount importance in mobile ad-hoc networks. The paper proceeds with a brief introduction of MANETs followed by...
Achieving low power consumption, size reduction, increased efficiency, and space optimization are all challenges in Wireless Sensor Networks (WSNs). WSNs use duty cycle to improve its power efficiency, and wake-up radio (WUR) is used as a control channel to wake up WSN nodes. With its highly flexible features, a field-programmable gate array (FPGA) is one of the attractive candidates for implementing...
Routing in WSNs (Wireless Sensor Networks) is very challenging due to some special characteristics that differentiate these networks from other wireless networks like cellular networks, mobile ad-hoc network etc. The difference is due to scalability, careful resource management etc. Sensor nodes are generally battery powered, are expected to be remotely deployed, and operated autonomously in unattended...
Virtual backbone is helpful to reduce computation and communication overhead in wireless networks. Based upon serial Maximum Independent Set (MIS) constructing algorithms, this paper presents a weight and timing based triggering Connected Dominating Set (CDS) constructing algorithm. In the algorithm, the nodes orderly join the MIS one after another, thus it greatly reduces the number of edge nodes,...
This paper presents an infrastructure sensor network and an adaptive MAC. The sensor network is intended for low power wireless sensor monitoring network which could tolerate certain amount of packet loss. Trade-off between power consumption and packet loss rate which application could tolerate is made. An adaptive MAC, which will choose Just-Send mechanism or classic pure ALOHA technique according...
Power consumption is one of the most important problems for wireless sensor networks because of the battery limitation in each sensor. This paper presents an ant colony optimization- (ACO-) based routing algorithm to reduce power consumption. First, a grade table is built and referred to generate several possible routing paths. Then, the ACO explores these paths to reduce the power consumption of...
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...
Building a wireless sensor network first of all requires the constituting nodes to be developed and available. These nodes have to met the requirements that come from the specific requirements of a given application. They might be small, cheap (energy efficient), they have to be equipped with the right sensors, the necessary computation and memory resources, and they need adequate communication facilities,...
AODV (Ad Hoc On-Demand Distance Vector) protocol is an on-demand protocol specialized for ad hoc network and it has been used as a mesh routing in 6LoWPAN (IPv6 over IEEE 802.15.4). In order to adapt to the hardware sources especially energy source restrictions of 6LoWPAN, we propose S-AODV (Sink Routing Table over AODV) routing, a new AODV implementation designed to provide benefits in terms of traffic...
In this paper, we firstly propose a maximum lifetime routing: the path cumulative power consumption routing(PCPC), based on the information of the two layers: medium access and routing. Secondly, a min-max optimal programming model is presented to describe the routing strategy. It aims to maximize the sensor network lifetime with minimal network power consumption by exploiting the cross-layer optimization...
A novel algorithm for adaptive control of the data sensing rate in wireless ad-hoc sensor networks (WSN) is presented. The WSN is applied to monitor the environmental parameters e.g. temperature and humidity, inside containers for the food transportation. Using the proposed algorithm, each sensor node can control its sensing intervals according to the surrounding environmental conditions. The data...
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...
In this paper, a pioneering platform is introduced, which utilizes all the advantages of CPLDs in order to enhance the processing power of the sensor nodes and, more importantly, significantly reduce the overall energy consumption in heavy demanding tasks such as routing and header processing. This new platform, accelerates the cost estimation algorithm of the XMesh routing protocol by 606 times....
In this paper, an energy efficient route finding scheme is proposed based on the directional antenna for wireless sensor networks (WSNs). First we derive the relationship between the number of hops and the energy consumption within a certain source-destination distance by analyzing the major factor influencing the power consumption on wireless channels. Second, combined with the benefits from directional...
Key technologies for the deployment of Wireless Sensor Networks are reduction of manufacturing and management cost. Even though many efforts have been made to reduce the price, size and power consumption of each sensor node, many architectural issues remain unsolved. We are developing a Wireless Sensor Networks platform relying on energy harvesting technologies. Solar cell is one of the most attractive...
In this paper, we propose an adaptive forwarding scheme for achieving efficient message delivery in the mobile sensor delay-tolerant network (DTN). By adaptively adjusting the probability of replicating a message based on the information about the number of existing message copies in the network, the proposed scheme can achieve nice balance between the delivery delay and the average message copy....
In wireless sensor networks (WSN), energy efficiency is crucial to achieving satisfactory network lifetime. The most commonly used and may be the only efficient method to reduce the energy consumption significantly is to turn off the radios most of the time, except when it has to participate in data communication. The key challenge is to operate the radio at a low duty cycle but still ensure the delay...
Adhoc sensor networks are being considered for many novel applications. There are many challenges while designing the sensor based adhoc network but main constraint is the power consumption done by the sensor nodes. Many solutions have been proposed to save the power of the senor nodes which are based on routing and other methodology. Most of the studies have considered switching off of the radio...
A cluster-based routing scheme for wireless sensor networks featuring adjustable cluster size is proposed in this article. Aimed at the reduction of power consumption, the proposed scheme is designed to adjust cluster sizes on the fly such that communication loads can be evenly shared by individual nodes, and consequently extend the lifetime of an entire sensor network. In the proposed scheme, named...
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