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Several challenges exist in case of wireless multimedia sensor networks. Out of those challenges, data redundancy is a major problem that is encountered in these networks. When any sort of event takes place in an area of interest, it is initially detected by the scalars. Subsequently, the concerned scalars communicate their reading to their respective cameras, within whose depth of fields the scalars...
This paper presents Forwarding and Routing Cluster-Based Protocol which aims to prolong wireless network lifetime by balancing energy consumption among all nodes. It avoids the premature death of the closest cluster-head (CH) for multi-hop protocols using hierarchical network clustering. FoRoC introduces two items: first, to take into consideration the node's local informations during CHs selection...
Collaborative spectrum sensing (CSS) consumes a significant amount of energy during sensing and reporting the sensing results. Such an issue becomes a challenge in the multi-channel systems. In this paper we propose two different energy-efficient CSS schemes, namely, Reduced-Energy Sensing Scheme (RESS) and Reduced-Energy Reporting Scheme (RERS). In RESS, the channels that have been identified as...
Sensor nodes are very important attribute in Wireless Sensor Networks (WSNs), due to communication over wireless links but it has some constrains i.e. limited transmission range, processing, storage capacity and energy. To get secure communication under these circumstances SPIN protocol incorporated data security for transferring data safely to the destination. To overcome the problem of SPIN protocol...
Radio-frequency (RF) based recharging of sensor nodes is a promising way to reduce maintenance and extend the operational life of wireless sensor networks. However RF attenuation causes the network nodes with largest distance from the access point (master node) to dictate the rate of recharging which imposes unnecessary breaks in the operation of nodes closer to the master. This deteriorates the throughput...
Energy efficient spectrum sensing and data communication to extend the lifetime of cognitive radio sensor network is becoming increasingly important due to resource constraint of CR-WSN inherent from WSN. This paper presents an energy-aware clustering (EAC) algorithm that enhances spectrum sensing performance and reduces network energy consumption thereby prolonging lifetime of the network. We derived...
Energy and communication capability of sensor nodes are limited in Wireless Sensor Networks. Directed diffusion (DD) is a classic data-centric routing protocol. For the deficiency of large energy consumption in periodical interest flooding and data detection, as well as the ignorance of nodes energy in path reinforcement, we propose an improved directed diffusion protocol based on Visible Forwarding...
Directed diffusion protocol enables data-centric routing for smart home sensor network. However, traditional directed diffusion protocol makes all nodes participating in the routing process. This causes a lot of redundant data transmission which brings unnecessary energy consumption. In this paper, we proposed LDDP, a location-based directed diffusion routing protocol for smart home sensor network,...
The exponential increase of wireless services has led to a great amount of energy consumption of base stations (BSs). In this paper, we envision that BSs of future cellular networks are heterogenous and can be powered by hybrid energy supplies. We study the user association problem for minimizing energy cost in such a green heterogeneous network. The key idea of our proposed algorithm is to reassign...
Data communication is the most expensive task within the resource restraint wireless sensor networks (WSN), where data aggregation and multi-hop communications are implemented within WSN to reduce energy consumption. Energy reduction is further possible by partitioning WSN into suitable clusters, which select intermediate gateways as data aggregation points. We have proposed an energy optimization...
In a Wireless Sensor Network (WSN), Medium Access Control (MAC) protocol is a key component to extend the lifetime of the WSN consisting of sensor nodes. Receiver-Initiated MAC (RI-MAC) is designed to reduce the energy consumed in the idle listening. RI-MAC may not spend energy efficiently since the data frame may collide frequently in the heavy traffic condition. We have proposed the Receiver-initiated...
Recently, a lot of studies have been done in wireless sensor networks (WSNs) based on IEEE 802.15.4. While a sensor device transmits data to a PAN coordinator via a coordinator, the failure of radio communications may be occurred between a coordinator and a PAN coordinator. A coordinator may conclude that it has been orphaned and then perform the orphan scan procedure which is specified in IEEE 802...
Energy consumption of wireless nodes in WSNs increases with transmission duration. To reduce it so as to extend the entire network lifecycle at no sacrifice of communication reliability and quality, this paper first proves experimentally the relationship of communication distance to emission rate is of a logistic curve and find the receiving current increases linearly with the emission rate, Then,...
Spectrum prediction estimates channel future status from history statistics, which greatly improved the efficiency of spectrum sensing in cognitive radio networks. Current researches mainly focus on improving speed and accuracy of prediction. Few researches discuss the energy-efficient design of spectrum prediction. Since energy-efficient affect working hours and transmission efficiency, that is an...
Deployment of wireless sensor network has been increasing tremendously for the last few years due to its wide applicability in various fields ranging from engineering industry to our home environment technology. Wireless Sensor Network involves of low powered and tiny sensor nodes. Network is live as long as the sensor nodes have energy. Efficient utilization of energy of sensor nodes is major factor...
In order to reduce the routing's energy cost, improve the reliability of the entire network, and ensure the service quality of data transmission, as well as lower the transmission delay in wireless sensor networks, an improved minimum hop routing protocol based on residual energy and congestion (CEMHR) is proposed, which consider energy, congestion and backup strategy. What is more, the protocol adopts...
The skyline query method in the wireless sensor network has been widely used in the field of environmental monitoring, the field is mostly related to the spatial distance. For the multidimension of space location, it brings enormous computational cost for the general skyline query method in terms of the property calculation. In order to improve the efficient use of sensor energy, the paper proposes...
This paper presents a method for optimizing OFDMA upstream scheduling in event monitoring applications related to IEEE 802.22 wireless regional area networks (WRANs). Upstream scheduling optimization is a trade-off between management transmission and data transmission in a frame. We provide analytical models to derive an optimum upstream schedule that maximizes the network performance in terms of...
This paper presents a clean slate radio network solution, that has been designed with the aim to maximize energy performance. In traditional radio network designs, the energy cost for providing coverage (idle mode functionality) is totally dominating the network energy consumption. Here, a logical separation between idle mode functions and user plane data transmission and reception will be assumed...
Wireless sensor nodes, as typically realized using IEEE 802.15.4 compatible low-power radio transceivers that offer limited throughput, are generally applicable to low-data rate intermittent monitoring applications. In order to realize high sample rate monitoring applications, it requires either transmitting raw data using a high-throughput radio transceiver or performing computation within the sensor...
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