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Intensive research in networking has fueled significant development in scale and diversity of networks such as wireless sensor networks and ad-hoc networks. It becomes difficult to design communication protocols for large-scale ad-hoc sensor networks. Node clustering is a key technique for extending the lifetime of a network by reducing energy consumption which can also increase network scalability...
In this paper we propose a distributed approach for localization in wireless sensor networks using a mobile beacon based on Particle Filter (PF) and Extended Kalman Filter (EKF). The algorithm has two phases. In the first phase, each node localizes itself using messages received from the mobile beacon. In the second phase nodes cooperate with each other to improve their estimations of their locations...
The personal area network (PAN) coordinator periodically transmits beacon frames to coordinator nodes as well as the coordinator nodes periodically transmit beacon frames to device nodes in the cluster tree topology of IEEE 802.15.4. The challenge in cluster tree network is the collisions between beacons or even between beacon and data frames, which degrades the network performance. In order to improve...
ZigBee is an emerging standard specifically designed for low-rate wireless personal area networks (LR-WPAN) with a focus on enabling the wireless sensor networks. It attempts to provide a low data rate, low power, and low cost wireless networking on the device-level communication. In this paper, we have established a realistic environment for the performance evaluation of the ZigBee wireless networks...
Since the present algorithms are on the assumption of correct beacon information, when the network is attacked, especially the beacons are captured by opponents, all algorithms will not work. To address this issue, one attack-resistant nodes localization algorithm we call VDV-Hop(Voting DV-Hop) which is on the basis of DV-Hop algorithm and based on the voting mechanism is presented. This algorithm...
The wireless sensor network (WSN) is one new hot spot for both research and industry. However, the energy problem has been becoming a challenge in practical applications for WSN because the sensor nodes are supplied with energy by batteries which are difficult to be recharged and replaced. So many researches are taken on reducing the energy consumption of WSN nodes. Medium Access Control (MAC) layer...
According to characteristics of coal mine goaf, a suitable routing mechanism based on LEACH protocol was proposed. The mechanism's improvement including two sides: Firstly, LEACH cluster heads selection mechanism was improved. Secondly a routing algorithm of wireless sensor network was designed with the multi-path routing mechanism. Finally, the NS2 simulation result show that this new routing mechanism...
Nowadays, according to the production and management on the offshore oil and gas platforms, the wireless sensor networks(WSNs) will have different reply to the platforms. For the offshore Oil and Gas platforms, switching from wired to wireless sensors, allowing data collection in remote or hostile areas. Reliability, power consumption and standard are three most important concerns that related to...
The nature of white space utilization, tremendous data processing, heterogeneous coexistence and security guarantees in Wireless Cognitive Sensor Network (WCSN) brings significant advantages over traditional Wireless Sensor Network (WSN). However, due to the introduction of spectrum sensing, dynamic spectrum access technology, WCSN is challenged by a variety of security threats in addition to that...
To deal with the challenges of Wireless Sensor Networks (WSN) in the smart grid, such as heterogeneous coexistence, spectrum scarcity, tremendous data processing and Security guarantees, revolutionary communication architecture is urgently demanded, a revolutionary communication paradigm termed as Wireless Cognitive Sensor Network (WCSN) whose basic idea is to incorporate cognitive radio capability...
With the rapid proliferation of new wireless technologies, devices and services in the smart grid, spectrum scarcity has become a major concern. In this paper, we introduce the conception of Wireless Cognitive Sensor Network (WCSN) into the smart grid to cope with the main challenges in the smart grid, such as spectrum scarcity, heterogeneous coexistence, tremendous data processing and security guarantees...
This paper proposes a context-aware model based on Multi-Agent for communication and mobility. We suggest an agent model that integrates the software agents of the application with the hardware agents of the physical environment. We describe an integrated target tracking experiment, to demonstrate an implementation of this architecture. The infrastructure takes environment agent as the center, thus...
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