The necessity to secure the communication between wireless sensornetworks nodes becomes important with the system nodes are being deployed for a wide variety of applications. In this paper, we propose a new approach ...
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ISBN:
(纸本)0769530486
The necessity to secure the communication between wireless sensornetworks nodes becomes important with the system nodes are being deployed for a wide variety of applications. In this paper, we propose a new approach for session key management among group sensor nodes. We use initial trust node to build a small set of shared keys, low-cost protocols enable neighboring sensors to authenticate and establish secure local links. Each shared key used only once after the set of shared keys are built. Our session scheme exhibits a nice power efficient and excellent updating communications keys. At the same time our scheme updating keys go with exchanging message. Extensive analyses and simulations are conducted to evaluate the proposed schemes, and the results show that the proposed management schemes can achieve a good level of security.
Influencing by the design principles of traditional layered protocol stack, current MAC protocol designing for wireless sensornetworks (WSN) seldom takes load balance into consideration, which greatly restricts WSN l...
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ISBN:
(纸本)0769530486
Influencing by the design principles of traditional layered protocol stack, current MAC protocol designing for wireless sensornetworks (WSN) seldom takes load balance into consideration, which greatly restricts WSN lifetime. In this paper, FE-MAC, as a novel Forwarding Election-based MAC protocol, is presented to prolong WSN lifetime by means of improving energy efficiency and enhancing load balance. By organizing nodes to contend packet relaying right, nodes with more residual energy have more chance to relay packets for sender, consequently, load balance and routing are achieved. Simulation results show that: Compared with S-MAC and T-MAC protocols, FE-MAC can gain significant longer network lifetime for all scales of networks. FE-MAC is more practical especially for configuring large scale WSN.
Wireless mesh networks have the potential to provide ubiquitous high-speed Internet at low costs. The good news is that initial deployments of WiFi meshes show the feasibility of providing ubiquitous Internet access. ...
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ISBN:
(纸本)9780769530482
Wireless mesh networks have the potential to provide ubiquitous high-speed Internet at low costs. The good news is that initial deployments of WiFi meshes show the feasibility of providing ubiquitous Internet access. However, their performance is far below the necessary and achievable limit. Moreover, users subscription in the existing meshes is dismal even though the technical challenges to get connectivity are low. This paper provides an overview of the current status of mesh network deployment and highlights the technical, economical and social challenges that need to be addressed in the next years.
Neighbor attachment is the process of establishing links between nodes that on the physical layer are visible to each other. Many strategies can be followed to connect to adjacent nodes. A simple scenario would be to ...
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ISBN:
(纸本)9780769530482
Neighbor attachment is the process of establishing links between nodes that on the physical layer are visible to each other. Many strategies can be followed to connect to adjacent nodes. A simple scenario would be to consider all nodes within the transmission range of a node as its neighbors. In future generationcommunicationnetworks more sophisticated scenarios may he followed to establish neighborhood relations with only a limited number of carefully selected nodes. Different neighbor attachment policies result into different network topologies. In any topology a packet sent from a node to one of its neighbors will experience interference, which is caused by simultaneous communications between other nodes in the network. Obviously, high levels of interference would severely disrupt communications. In this paper we examine effects of neighbor attachment policies on interference. To the best of our knowledge, this important point has not received proper attention before. Our study enables us to identify neighbor attachment directives that can reduce the amount of interference in ad-hoc and sensor network.
Wireless sensornetworks (WSN) have been attracting growing interests for developing a new generation Of large-scale embedded computing systems, with a great potential for a wide range of applications such as surveill...
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ISBN:
(纸本)9781424408269
Wireless sensornetworks (WSN) have been attracting growing interests for developing a new generation Of large-scale embedded computing systems, with a great potential for a wide range of applications such as surveillance, environmental monitoring, emergency medical response or building automation. However, the communication paradigms in wireless sensornetworks differ from the ones associated to traditional wireless networks, triggering the need for new communication protocols and architectures. The ART-WiSe (Architecture for Real-Time communications in Wireless sensornetworks) framework aims at the design of a scalable multiple-tiered WSN architecture for supporting large-scale embedded computing applications with critical requirements. An overlay Wireless Local Area Network (Tier-2) serves as a backbone for a WSN (Tier 1), relying on existing standard communication protocols and commercial-off-the-shell (COTS) technologies IEEE 802.15.4/ZigBee for Tier I and IEEE 802. 11 for Tier-2. This paper outlines ongoing work on the design of the architectural requirements and features for a QoS-aware gateway between both networks.
We present a mathematical model for a distributed process of routing optimization that could be run in the control plane of the Internet using existing EGP routing protocols. A more detailed description of the results...
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ISBN:
(纸本)97830540726050
We present a mathematical model for a distributed process of routing optimization that could be run in the control plane of the Internet using existing EGP routing protocols. A more detailed description of the results presented in this paper is given in [1].
We propose a novel measure method of information utility for tracking and localization in wireless sensornetworks (WSNs). The target moving arbitrarily in WSNs is modeled by Markov chains using a transition matrix. T...
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ISBN:
(纸本)9781424406586
We propose a novel measure method of information utility for tracking and localization in wireless sensornetworks (WSNs). The target moving arbitrarily in WSNs is modeled by Markov chains using a transition matrix. The proposed information utility measurement allows us to expect the next state of the target and identify the informative sensors. Further, compared with existing localization methods, the proposed power-aware sensor selection considers the energy constraint of WSNs. To conserve energy, a subset of sensor nodes are activated based on a combinative measurement including information utility, communication cost, and residual energy. We have implemented the proposed localization system on real motes and experimented in an obstacle-free environment. The experimental results demonstrate that the proposed method outperforms two popular baseline schemes, k-nearest-neighbor and stochastic schemes, at extending the network lifetime. In addition, it balances the energy level of sensors in the network so that energy consumption is spread uniformly over all the sensors.
communication between sensors and controlling entities at the edge or outside the sensor network is needed for reliable remote sensor node management and reprogramming. TCP would be useful for tasks, where reliable un...
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Energy-Efficiency in wireless sensornetworks is a very critical design issue, because they usually operate with tiny batteries and take a long time for replacement. In this context, we analyze the optimized schedulin...
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ISBN:
(纸本)9781424403523
Energy-Efficiency in wireless sensornetworks is a very critical design issue, because they usually operate with tiny batteries and take a long time for replacement. In this context, we analyze the optimized scheduling strategy to minimize the energy consumed by data fusion in wireless sensor network. For implementation purpose, a low-complexity fractional-inverse-log scheduling (FILS) algorithm is presented to reduce extra significant amount of energy consumption compared to previously designed protocols. next, in order to eliminate the communication overhead in centralized scheduling protocols, the simplified distributed fractional-inverse-log scheduling is also provided, which is shown to be very efficient in energy saving especially for a large-scale wireless sensor network. With consideration of the peak power constraint in real circuit design, we update FILS to further constrict the transmission time. Simulation results show that with peak transmission power limitation, energy consumption is still substantially reduced by FILS, and it yields more energy saving for the system with high peak-to-average power ratio (PAPR).
In response to increasing demands for true multimedia telecommunications services anywhere any time there are concerted efforts worldwide towards the definition and development of "future-generation" wireles...
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ISBN:
(纸本)076952835X
In response to increasing demands for true multimedia telecommunications services anywhere any time there are concerted efforts worldwide towards the definition and development of "future-generation" wireless systems which may be expected to enter service within the next ten years. These will differ from current and near-future systems such as second- and third-generation cellular, WIFI, WiMAX and 3G long term evolution systems, in several important aspects: The radio system will configure itself and adapt to a users' needs, the capabilities of the user's terminal, and to the environment scenario. A "user" may be a person or a device, such as a sensor. The system can easily adapt to local hot spot, metropolitan area or wide area scenarios, static or fast-moving. The system will support high user densities and a very wide range of user bit rates - Kilobits per second to hundreds of Megabits per second. All this will be achieved with efficient spectrum usage and sharing, low cost, and acceptably low terminal power consumption. Such future wireless systems (sometimes called "fourth generation" (4G), sometimes called "beyond third generation" (B3G)), capable of transporting very high bit rates In non-ideal radio propagation environments, must be robust to severe frequency selective multipath. Further requirements include moderate terminal and base station hardware costs, high spectral efficiency, and scalability of the cost of terminals with respect to their maximum bit rate capabilities. Reconfigurable air Interfaces, based on frequency domain transmission and reception methods, best meet these requirements, by adaptively selecting the uplink and downlink modulation and multiple access scheme that is most appropriate for the channel, Interference, traffic and cost constraints. In this talk we discuss a generalized frequency domain-based approach to next-generation wireless air interfaces, presenting examples and research results, including channel estimation and power
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