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Protocol design and optimization for delay/fault-tolerant mobile sensor networks

Protocol design and optimization for delay/fault-tolerant mo...

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27th international conference on distributed computing systems, ICDCS'07

作者： Wang, Yu Wu, Hongyi Lin, Feng Tzeng, Nian-Feng Center for Advanced Computer Studies University of Louisiana at Lafayette P.O. Box 44330 Lafayette LA 70504

ISBN: (纸本)0769528376

While extensive studies have been carried out in the past several years for many sensor applications, they cannot be applied to the network with extremely low and intermittent connectivity, dubbed the Delay/Fault-Tolerant Mobile sensor Network (DFT-MSN). Without end-to-end connections due to sparse network density and sensor node mobility, routing in DFT-MSN becomes localized and ties closely to medium access control, which naturally calls for merging Layer 3 and Layer 2 protocols in order to reduce overhead and improve network efficiency. DFT-MSN is fundamentally an opportunistic network, where the communication links exist only with certain probabilities and become the scarcest resource. At the same time, the sensor nodes in DFT-MSN have very limited battery power like those in other sensor networks. Clearly, there is a tradeoff between link utilization and energy efficiency. To address this tradeoff, we develop a cross-layer data delivery protocol for DFT-MSN, which includes two phases, i.e., the asynchronous phase and the synchronous phase. In the first phase, the sender contacts its neighbors to identify a set of appropriate receivers. Since no central control exists, the communication in the first phase is contention-based. In the second phase, the sender gains channel control and multicasts its data message to the receivers. Furthermore, several optimization issues in these two phases are identified, with solutions provided to reduce the collision probability and to balance between link utilization and energy efficiency. Our results show that the proposed cross-layer data delivery protocol for DFT-MSN achieves a high message delivery ratio with low energy consumption and an acceptable delay. © 2007 ieee.

关键词： Wireless sensor networks

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Architectural elements of integrated micro-sensors for distributed sensor networks

Architectural elements of integrated micro-sensors for distr...

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ieee 18th international conference Application-specific systems, Architectures and Processors, ASAP07

作者： Seetharaman, Guna S. Talbert, Michael L. Blasch, Erik Air Force Institute of Technology Air Force Research Laboratory

ISBN: (纸本)1424410274

Recent advancements in the design, fabrication and packaging of micro electro-mechanical (MEM) sensors with embedded computing and wireless communication capabilities have made positive impacts on persistent surveillance of large areas in hostile conditions. We outline a set of core capabilities required of smart sensors to establish their precise location and perform collaborative sensing to gain and maintain maximum situation awareness. Such features include: CORDIC structured computations, direction selective transmission and reception through RF-MEMS, chip-scale atomic clock (CSAC), infra structure assisted sensing, among others. Then we outline several system-level considerations such as: command, control, collaborative & cognitive computation and communication, and offer an end-user perspective of intelligent sensors in mission oriented sensor networks. The objective is to provide insights into the critical challenges for increasing the effectiveness of future sensor networks. We use a hypothetical counter-sniper system as an example to concretely emphasize the value of such features. © 2006 ieee.

关键词： Microsensors

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Building pervasive services using flock sensor network and flock container middleware

Building pervasive services using flock sensor network and f...

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21st international conference on Advanced Information Networking and ApplicationsWorkshops/Symposia, AINAW'07

作者： Munch-Ellingsen, Arne Eriksen, Dan Peder Thorstensen, Bjørn Andersen, Anders University of Tromsø Norway Telenor R and I

ISBN: (纸本)0769528473

sensor networks, ad-hoc networking and supporting infrastructure (e.g. middleware) are major building blocks for pervasive computing and pervasive services. Our experience has made it clear that sensor networks, and in particular our flock sensor network, have scarce support for application development needs. To provide for rapid development of pervasive services based on ingested sensor data from sensor networks we have developed both a sensor network and an accompanying infrastructure support (e.g. middleware). The sensor network protocols have been designed to meet the disconnection and power consumption requirements often found as a result of intrinsic properties of mobile sensor networks. Existing (enterprise) middleware platforms have severe limitations for the creation of services that need access to for example the local file system or external/local sensors. The component based programming model imposed by such middleware systems has however proven itself useful for the production of service oriented applications. We have created a container based middleware platform, similar to enterprise middleware systems but without their limitations. This platform makes it easier to create pervasive, service oriented, applications possibly based on data from sensor networks. © 2007 ieee.

关键词： sensor networks

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Keynote speech 2: Routing techniques in wireless sensor networks

Keynote speech 2: Routing techniques in wireless sensor netw...

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2007 ieee/ACS international conference on Computer systems and Applications, AICCSA 2007

作者： Jamalipour, Abbas IEEE IEAust IEEE Communications Society

ISBN: (纸本)1424410312

The diminution in size and power consumption of digital circuitry, wireless communication and micro electro-mechanical systems (MEMS) are influencing the progression towards the smart dust era. Smart dusts are wireless sensors with own battery power, computing and communication facility. It is envisaged that from the application's perspective, in the area of military, health, environmental, industrial and home automation wireless sensor networks (WSN) will have a significant impact. Accordingly, WSN will witness a huge growth in the near future and both the academia and industry have commenced intensive research. Routing protocol design in WSN is one of the most important areas of active research due to the open issues and its importance. WSNs usually contain a large number of nodes typically with highly correlated collected data. These networks can be categorized according to the network structure and their protocol operations. Network structure based categorization of WSN can be flat or hierarchical. In flat networks, all the nodes in the networks take the same responsibility, while in hierarchical networks the cluster-heads perform several special functions such as maintaining the clusters and aggregation. To support large-scale wireless sensor network management and local data aggregation, hierarchical routing techniques can be regarded as superior to flat routing approaches. Low power consumption as well as smart way of distributing the load is crucial to the routing protocol design in order to attain elongated WSN lifetime. We have already proposed a distributed routing algorithm;optimized forwarding by fuzzy inference systems (OFFIS) for the flat networks, where the decision is based on the distance power and link uses. In addition, we have proposed a two-layer OFFIS (2L-OFFIS) for environmental data collection in cluster-based sensor networks. In this talk, major routing protocols for the WSNs will be presented and the results will be compared with those tha

关键词： Wireless sensor networks

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Highly scalable and efficient Publish/Subscribe protocols using geographic information for wireless sensor networks

Highly scalable and efficient Publish/Subscribe protocols us...

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3rd Intelligent sensors, sensor Networks and Information Processing conference

作者： Zheng, Yuan Cao, Jiannong Hong Kong Polytech Univ Dept Comp Internet & Mobile Lab Kowloon Hong Kong Peoples R China

ISBN: (纸本)9781424415014

Publish/Subscribe (Pub/Sub) systems have been used in traditional distributed computing applications to provide effective and efficient event services. Recently, the design of Pub/Sub systems are proposed for wireless sensor networks (WSNs). Some of the proposed Pub/Sub protocols address the issue of establishing event delivery path with low routing cost by using geographic information. However, they have not considered how to reduce redundant event delivery, which may cause high resource consumption and poor system scalability. In this paper, we propose protocols which address both issues. More specifically, our protocols use geographic information to save routing cost, and meanwhile reduce redundant event delivery by letting the subscribers share the event delivery paths. Three highly scalable and efficient Pub/Sub protocols for WSNs, namely Shortest Delivery Path (SDP), Shortest Delivery Path with Lower Delivery Overhead (SDP-LDO), and Lowest Delivery Overhead (LDO), are designed to achieve different performance goals. The results of theoretical and experimental evaluation show that the proposed protocols can significantly improve the resource efficiency and scalability of a Pub/Sub system compared to the previous solutions. Our protocols can also be used to achieve a good tradeoff between the costs of event subscribing and event delivery.

关键词： Wireless sensor networks

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Proceedings - 21st international conference on Advanced Information Networking and ApplicationsWorkshops/Symposia, AINAW'07

Proceedings - 21st International Conference on Advanced Info...

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21st international conference on Advanced Information Networking and ApplicationsWorkshops/Symposia, AINAW'07

ISBN: (纸本)0769528473

The proceedings contain 333 papers. The topics discussed include: resource discovery in ubiquitous health care;managing privacy in LBAC systems;pervasive computing with frugal objects;a modular architecture for context sensing;performance evaluation of RFID anti-collision algorithm with FPGA implementation;cross layer routing for multihop cellular networks;an optimal node selection scheme in multi-hop wireless network;rank theorems for forward secrecy in group key management protocols;a secure group agreement (SGA) protocol for peer-to-peer applications;service provider implementation of sip regarding security;a service architecture for countering distributed denial of service attacks;effective caching in wireless sensor network;multi-agent coordination mechanism based on indirect interaction;and on the miscollaboration of congestion control mechanisms at the transport and the network layers.

关键词： Wireless sensor networks

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Proceedings - 21st international conference on Advanced Information Networking and ApplicationsWorkshops/Symposia, AINAW'07

Proceedings - 21st International Conference on Advanced Info...

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21st international conference on Advanced Information Networking and ApplicationsWorkshops/Symposia, AINAW'07

ISBN: (纸本)0769528473

关键词： Wireless networks

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13th ieee international conference on Embedded and Real-Time computing systems and Applications - Title

13th IEEE International Conference on Embedded and Real-Time...

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ieee international conference on Embedded and Real-Time computing systems and Applications (RTCSA)

The following topics are discussed: embedded and real-time computing systems and applications; resource sharing; memory management; multiprocessor scheduling; ubiquitous wireless networks; middleware; ubiquitous computing; distributed systems; power-aware design; databases; wireless sensor networks; uniprocessor scheduling; compiler techniques; context awareness and privacy; and system-on-chip.

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Lightweight distributed Topology Control Algorithms for Heterogeneous Wireless sensor Networks

Lightweight Distributed Topology Control Algorithms for Hete...

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ieee international conference on Embedded and Real-Time computing systems and Applications (RTCSA)

作者： Jun Wu Han-Chi Lin Yung-Feng Lu Department of Information Technology National Pingtung Institute of Commerce Ping Tung Taiwan Department of Computer Sci. & Info. Eng. National Taiwan University Taipei Taiwan

Energy efficiency remains a critical design issue for wireless sensor networks. How to maintain the network connectivity and, at the same time, to minimize the energy consumption is a very challenging problem. Different from many previous excellent results, we explore the topology control problem for heterogeneous wireless sensor networks. Our objective is to propose distributed topology control algorithms, where only local information is kept for all of the nodes. The experimental results show the strengths of the proposed algorithms in the average edge length and the average link length.

关键词： Network topology distributed control Lighting control Wireless sensor networks Energy consumption distributed algorithms Computer networks Energy efficiency Data communication Information technology

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On Improving Data Accessibility in Storage Based sensor Networks

On Improving Data Accessibility in Storage Based Sensor Netw...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Tan Apaydin Serdar Vural Prasun Sinha Department of CSE Ohio State Uinversity USA

In-network data storage techniques can provide robustness against failure of dedicated sink nodes in sensor networks. For storing data in the network it is critical to ensure that the data can be accessed from other nodes for a long period of time. As replicating the data will increase consumption of resources, we propose a technique for data relocation that optimizes the accessibility of the data in the network. The two challenging constraints for solving this problem are "limited sensor lifetime" and "cost of data relocation". We study both centralized and distributed approaches for computing accessibility of each node. Using extensive simulations, we evaluate the performance of our techniques.

关键词： Robustness Computer architecture Energy resources Intelligent sensors Batteries Memory Costs distributed computing Computational modeling Wireless sensor networks

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