Power management of sensor nodes is essential to maximize the lifetime of wireless sensor networks. Energy consumption of individual sensor node differs greatly depending on its type. Existing operating systems for se...
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ISBN:
(纸本)9781424425747
Power management of sensor nodes is essential to maximize the lifetime of wireless sensor networks. Energy consumption of individual sensor node differs greatly depending on its type. Existing operating systems for sensor networks typically leave the power management of sensors to applications. Unless specific features of the sensors and batteries are considered in the application design, energy consumption may increase or the application may malfunction. In this paper, we define factors to be considered for sensor-specific power management, and then propose an automated sensor-specific power management system. the system is implemented on the multi-threaded RETOS operating system for sensor networks. the experiment results with various applications show that the proposed system reduced the energy consumption by up to 29% without modification of the application code.
In wireless sensor networks (WSN) node failures are typically detected using a heartbeat application, where a neighbor detects a failed node when it misses successive short messages ("heartbeats") that shoul...
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ISBN:
(纸本)9781424425747
In wireless sensor networks (WSN) node failures are typically detected using a heartbeat application, where a neighbor detects a failed node when it misses successive short messages ("heartbeats") that should have been sent by the failed node. However, wireless links are usually lossy, hence, to distinguish node failures from intermittent link failures, the threshold on the number of missed heartbeats is usually set to a large number, incurring in a long delay for declaring a node dead. In this paper we present "GroupBeat" an accurate node failure detection system for WSN and propose the "Communication By Signaling" scheme as an energy-efficient low-overhead implementation of GroupBeat.
Energy efficiency has been known as the most important problem in wireless sensor networks. As a classic clustering-based protocol LEACH do a tremendous contribution on energy, efficiency. But it has some drawbacks th...
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ISBN:
(纸本)9780769532882
Energy efficiency has been known as the most important problem in wireless sensor networks. As a classic clustering-based protocol LEACH do a tremendous contribution on energy, efficiency. But it has some drawbacks that the cluster head may not well distributed, and the number of nodes in each cluster is distributed unequally. In this paper we proposed a new protocol BCBE (Balanced Cluster and Balanced Energy), the advantage of this routing protocol is we only have to know the location information of two nodes to locate other sensor nodes. the key feature of the protocol is: balanced cluster, balanced energy dissipation, hierarchical routing and load balance. Simulation results show that the proposed routing protocol can achieve longer network lifetime than LEACH.
Establishing and maintaining secure communication paths in a wireless sensor network poses mathematical and technical challenges. We suggest to use random nonces to set up secure communication links after the network ...
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ISBN:
(纸本)9780769534923
Establishing and maintaining secure communication paths in a wireless sensor network poses mathematical and technical challenges. We suggest to use random nonces to set up secure communication links after the network deployment phase. this idea exploits some of the inherent features of sensor networks, e.g.: nodes are densely deployed;the wireless communication areas of neighbouring nodes have a large overlap. We outline the analytical properties of such a scheme and show simulation results which corroborate them for practical purposes.
In a wide range of applications, such as detecting environmental hazards, monitoring remote terrain and even monitoring customer behavior, Wireless sensor Networks (WSNs) are playing an important role. Due to the limi...
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ISBN:
(纸本)9780769534923
In a wide range of applications, such as detecting environmental hazards, monitoring remote terrain and even monitoring customer behavior, Wireless sensor Networks (WSNs) are playing an important role. Due to the limited energy in each node, a lot of attention has been paid on improving energy efficiency. In this paper, we first propose an Energy-Efficient Waiting Caching (EEWC) algorithm to improve the Data-Centric (DC) transport control protocol by cutting down traffic How. Second, we deploy Networked Predictive Controller (NPC) to shorten network delay. thus, the energy consumption can be reduced accordingly. We also analyze the proposed algorithm. Finally, we conduct extensive simulation experiments to evaluate the performance of the proposed algorithm.
this paper presents a security-enhanced variant of LEAP+, called LEAP++. the proposed scheme not only improves the security against node capture attacks but also provides additional robustness against denial-of-servic...
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A flexible, ubiquitous, and universal solution for management of distributed dynamic systems will be presented. It allows us to grasp complex systems on a higher than usual, semantic level, penetrating their infrastru...
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ISBN:
(纸本)9789898111319
A flexible, ubiquitous, and universal solution for management of distributed dynamic systems will be presented. It allows us to grasp complex systems on a higher than usual, semantic level, penetrating their infrastructures, also creating and modifying them, while establishing local and global dominance over the system organizations and coordinating their behavior in the way needed. the approach may allow the systems to maintain high runtime integrity and automatically recover from indiscriminate damages, preserving global goal orientation and situation awareness in unpredictable and hostile environments.
In this demo, a new application for the Wireless sensor Networks (WSN) is presented. this is the first time WSN is used to in the music field, where the music is being manipulated and changed according to the movement...
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ISBN:
(纸本)9781424425747
In this demo, a new application for the Wireless sensor Networks (WSN) is presented. this is the first time WSN is used to in the music field, where the music is being manipulated and changed according to the movement of the dancer. Twenty-three tmote sensors have been deployed on a dancing stage, and two sensors were attached to the arms of each dancer. Information collected from sensors deployed on the stage are being sent and processed at a central location where the music being played is manipulated this project is the first phase of collaboration in a multi-disciplinary research between the Computer Science department and the College-Conservatory of Music at the University of Cincinnati.
the localization process in wireless sensor networks must produce precise positions at minimal requirements. It is hard to comply withthese conditions, due to the strong resource limitation of each sensor node. Altho...
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Wireless sensor networks are mainly designed for environment surveillance where wireless sensor nodes cooperate to get their job done. Generally, wireless sensors are battery powered. therefore, it is crucial to use s...
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ISBN:
(纸本)9780769534923
Wireless sensor networks are mainly designed for environment surveillance where wireless sensor nodes cooperate to get their job done. Generally, wireless sensors are battery powered. therefore, it is crucial to use sensor nodes' battery resources efficiently. Most of the existing power saving protocols achieve power saving by putting sensor nodes to sleep periodically. Such a uniform sleep/wake up mechanism fails to adjust a sensor node's sleep duration based on its traffic load, thus causing either lower power efficiency or higher latency. In this paper we proposed a quorum-based MAC protocol that enables sensor nodes to sleep longer under light loads. Since traffic flows toward the sink node in wireless sensor networks, a new concept next hop group was also proposed to reduce transmission latency. Simulation results verified that the proposed QMAC saved more energy and kept the transmission latency low.
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