this paper studies the problem of associating deterministically a track revealed by a binary sensor network withthe trajectory of a unique moving anonymous object, namely the Multiple Object Tracking and Identificati...
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ISBN:
(数字)9783540691709
ISBN:
(纸本)9783540691693
this paper studies the problem of associating deterministically a track revealed by a binary sensor network withthe trajectory of a unique moving anonymous object, namely the Multiple Object Tracking and Identification (MOTI) problem. In our model, the network is represented by a sparse connected graph where each vertex represents a binary sensor and there is an edge between two sensors if an object can pass from a sensed region to another without activating any other remaining sensor. the difficulty of MOTI lies in the fact that trajectories of two or more objects can be so close (track merging) that the corresponding tracks on the sensor network can no longer be distinguished, thus confusing the deterministic association between an object trajectory and a track. the paper presents several results. We first show that MOTI cannot be solved on a general graph of ideal binary sensors even by an omniscient external observer if all the objects can freely move on the graph. then, we describe some restrictions that can be imposed a priori either on the graph, on the object movements or both, to make MOTI problem always solvable. We also discuss the consequences of our results and present some related open problems.
Communication between arbitrary pairs of nodes has become critical to support in emerging sensor networking applications. Traditional routing techniques for multihop wireless networks either require high control overh...
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ISBN:
(纸本)9781424425747
Communication between arbitrary pairs of nodes has become critical to support in emerging sensor networking applications. Traditional routing techniques for multihop wireless networks either require high control overhead in computing and maintaining routes, or may lead to unbounded route-stretch. In order to bound the route-stretch, we propose a distributed shortest-path roadmap based routing paradigm that embodies two ideas: routing hole approximation that summaries the critical information about hole boundaries and controlled advertisement that advertises the boundary information of each hole within limited neighborhoods. We show that our approach makes a desired tradeoff between the worst case route-stretch and the message overhead through both analysis and simulations.
Dynamic address assignment is a desirable feature for deploying wireless sensor network. Typically, a distributed address assignment mechanism is accomplished by ZigBee alliance, whereas, sensors join a network is unp...
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In recent years, wireless sensor networks have been an interesting and important research area. the time synchronization is an important problem for wireless sensor networks. In this paper, a novel time synchronizatio...
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ISBN:
(纸本)9781424421077
In recent years, wireless sensor networks have been an interesting and important research area. the time synchronization is an important problem for wireless sensor networks. In this paper, a novel time synchronization scheme based on spanning tree for wireless sensor networks is proposed. First, we create a spanning tree of all the nodes in the network by broadcasting children-find packets. then, the spanning tree is divided into multiple subtrees, in which one subtree synchronization algorithm can be performed. After that, time synchronization of the whole network will be achieved. Performance analyses and simulations are presented in this paper, and demonstrate that our proposed scheme has much less synchronization error than RBS [4].
In this paper, a novel design method of the wireless tilt sensor network node is presented. Firstly, acceleration is measured by the MEMS-based biaxial acceleration sensor ADXL202, so, there are several advantages, su...
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ISBN:
(纸本)9781424421077
In this paper, a novel design method of the wireless tilt sensor network node is presented. Firstly, acceleration is measured by the MEMS-based biaxial acceleration sensor ADXL202, so, there are several advantages, such as low power consumption, simple external circuit and so on. then, tilt could be calculated from acceleration. In the software development, calculating tilt signals and point-to-point wireless communication are realized, based on the famous wireless sensor network embedded operating system TinyOS. Experimental results have showed that the node could meet the performance requirements of the wireless tilt sensor network.
this paper presents "SimPlayGround" - a framework for the stimulative evaluation of reactive and proactive power-management approaches in distributed energy harvesting systems. Our simulation framework combi...
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ISBN:
(纸本)9780769533308
this paper presents "SimPlayGround" - a framework for the stimulative evaluation of reactive and proactive power-management approaches in distributed energy harvesting systems. Our simulation framework combines the simulation of wireless communication, the behavior of reversible power supplies and the dynamics of power consumption. It supports models of the environmental power and energy harvesters with an on-line computation of aviable power, so that the control of the simulated system can base on it.
In recent years, wireless sensor networks (WSNs) have been an interesting and important research area. Many routing protocols for WSNs have been designed for various objectives. In this paper, a novel energy-aware rou...
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ISBN:
(纸本)9781424421077
In recent years, wireless sensor networks (WSNs) have been an interesting and important research area. Many routing protocols for WSNs have been designed for various objectives. In this paper, a novel energy-aware routing protocol in WSNs is proposed for achieving high energy-efficiency which prolongs the network lifetime and is one of the most important requirements for applications of WSNs. Additionally, communication delay is fully considered. Performance analyses and simulation results show that our proposed protocol has much better performance than Directed Diffusion [2] and Rumor Routing [5] in terms of both network lifetime and communication delay.
Wireless sensor networks (WSN) are the subject of widespread deployment in commercial and military environments that call for security. Since sensor networks pose unique challenges, traditional security techniques use...
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ISBN:
(纸本)9780769533933
Wireless sensor networks (WSN) are the subject of widespread deployment in commercial and military environments that call for security. Since sensor networks pose unique challenges, traditional security techniques used in traditional networks cannot be directly applied. A previous work defines TinySec, a link layer security protocol for TinyOS to provide integrity and confidentiality of messages for WSN. However, TinySec employs a simple group key management where a single shared key is stored in each sensor node. this makes the network unsecured and vulnerable to attacks. therefore, TinySec must be enhanced with a more robust key management scheme. this paper presents the integration of a proposed key management scheme as a more robust key management solution for TinyOS. the more secured TinyOS is evaluated in terms of key computation time, memory, and energy consumption overhead. Experimental results demonstrate that the secure key management protocol introduces negligible overhead and does not affect the system performance. We also present performances comparison with two well known key distribution protocols, implemented specially for sensor networks namely, ECDLP and LEAP.
Wireless sensor networks (WSN) have received a lot of attention recently due to their wide range of applications in military as well as civilian operations. It is a challenging work to design suitable cryptography for...
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ISBN:
(纸本)9781424421077
Wireless sensor networks (WSN) have received a lot of attention recently due to their wide range of applications in military as well as civilian operations. It is a challenging work to design suitable cryptography for wireless sensor networks since the limitations of power, computation capability, and sotrage resources. Many schemes based on symmetric or public key cryptography have been investigated. Recently, a practical identity-based encryption technique is proposed. this paper presents an efficient identity-based encryption scheme. the new scheme is proved secure in wireless sensor network environment while reduces the requirement of resource.
Time synchronization is an essential problem for wireless sensor networks (WSNs). the synchronization algorithms presented in [5-7, 11-14] were based on the constant-rate clock model, thus could not compensate the clo...
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ISBN:
(纸本)9781424421077
Time synchronization is an essential problem for wireless sensor networks (WSNs). the synchronization algorithms presented in [5-7, 11-14] were based on the constant-rate clock model, thus could not compensate the clock drift. In this paper, based on the more reasonable bound-drift clock model [8, 9 and 10], we propose an improved time synchronization algorithm of [5, 6 and 7]. In the algorithm, we develop a new method to estimate and compensate the clock drift and the clock offset. Mathematical analyses And simulations are presented in this paper, and verify the effectiveness of our synchronization algorithm.
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