[PDF] Top 20 Energy efficiency opportunistic spectrum allocation in cognitive wireless sensor network

... each sensor sender-receiver pair to locally adjust its choice of spectrum, and trans- mit power, subject to connectivity and interference con- ...and spectrum, earns a reward based on the utility ... See full document

... increasing. Spectrum resources are becoming increasingly limited with the emergence of various wireless devices and applications ...of wireless devices and technology, new frequency bands are being ... See full document

... for wireless patient monitoring is an vital constituent to enhancing patient aftermath and lowering healthcare ...low-cost, wireless mechanisms, universal patient monitoring can be spread to most if not all ... See full document

... consumed energy based on two optimization objectives, ...from sensor nodes in the best intermediate ...bit allocation among the sensor node has not been investigated in 1-D queue ...unreliable ... See full document

... power allocation and relay selection scheme for energy efficient cooperation in energy harvesting-wireless sensor networks ...the energy efficiency of each node in a ... See full document

... average energy consumption, and live node comparison. The average residual energy of the network is shown in figure ...average energy change rate of the EAOR algorithm and the EEOR algorithm ... See full document

... underlay cognitive radio, and cooperative relaying networks are combined into a novel cooperative spectrum sharing relaying ...the energy efficiency, but also the spectrum ... See full document

... — Energy savings optimization becomes one of the major concerns in the wireless sensor network (WSN) routing protocol design, due to the fact that most sensor nodes are equipped with ... See full document

... Nets. Wireless technology has enabled has enabled the development of increasingly diverse applications and devices resulting in an exponential growth in usage and ...radiofrequency spectrum a scarce ... See full document

... (CR) sensor networks (CRSNs) have been proposed to improve the channel utilization of wireless networks suffering from serious shortage of radio spec- ...each sensor node which does not have a ... See full document

... Based on the limitation of the random cluster head election mechanism of TEEN, this paper introduces A-TEEN, which is an extension of TEEN. A-TEEN uses the number of vacant channels as a weight in the prob- ability of ... See full document

... In cognitive radio networks (CRNs), the secondary users (SUs) can opportunistically access the spectrum bands unoccupied by the primary users ...CRNs, spectrum sensing is widely used by SUs to ... See full document

... that once an error occurs at sink nodes or intermediate nodes, a request will be sent to the source node for retransmission. However, the cost of retransmission is great in WSNs since it may bring some problems such as ... See full document

... that network initialization phase each node has provided with its own wake-up scheme and sleep periods depending on network ...the network traffic and message ... See full document

... of wireless sensor and smartphones for the monitoring of ...use energy efficiently in the case of remote health monitoring ...biomedical sensor and transferred to the next server. The ... See full document

... Wireless sensor networks have brought a new wave in the technology today as a result of advancements in the micro electro mechanical systems technology, integrated circuit technology, microprocessor and ... See full document

... ABSTRACT: Wireless Sensor Network is one type of ad-hoc network; it has limited bandwidth, low energy with small ...make sensor infeasible to used security ...in wireless ... See full document

... called wireless sensor and actuator networks (WSANs) [1], are remotely located wireless sensors to monitor realistic conditions, and to bi- directionally transfer information by the networks to a ... See full document

... for wireless sensor networks, which is a combination of the energy-efficient cluster-based routing and media access protocols, in order to attain good performance in terms of network lifetime, ... See full document

... The algorithm selects two sensor nodes in each cluster as cluster heads, one node as primary cluster head and the other as the secondary cluster head.. Both the primary and secondary clu[r] ... See full document