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检索条件"任意字段=IEEE International Conference on Distributed Computing in Sensor Systems"

共 30758 条记录，以下是281-290 订阅

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distributed Multi-Hop Network Association in Large-Scale Wireless sensor Networks

Distributed Multi-Hop Network Association in Large-Scale Wir...

引用

33rd ieee international conference on distributed computing systems (ICDCS)

作者： Kim, Hyung-Sin Bang, Jae-Seok Lee, Yong-Hwan Seoul Natl Univ Sch Elect Engn Seoul South Korea Seoul Natl Univ INMC Seoul South Korea

ISBN: (纸本)9781479932474;9780769550237

In this paper, we consider the construction of a large scale wireless sensor network (WSN) by means of distributed network association with scalability. We design a network association mechanism that allows each router to have its own addressing space for unique addressing of its child nodes based on a pre-initialized addressing tree. We also design a device selection algorithm that can locate routers throughout the whole deployment area using a minimum number of routers (i.e., minimizing the energy consumption). Thus, nodes can securely join the network through a sufficient number of neighboring routers, with the use of a uniquely allocated address in a distributed manner. Finally, the performance of the proposed scheme is evaluated by computer simulation, showing remarkable performance improvement over conventional schemes when applied to the construction of a large scale WSN.

关键词： wireless sensor network network association address allocation distributed operation energy consumption

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Accelerating 6TiSCH Network Formation 17

Accelerating 6TiSCH Network Formation

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17th Annual ieee international conference on distributed computing in sensor systems (ieee DCOSS)

作者： Tanaka, Yasuyuki Minet, Pascale Watteyne, Thomas Teraoka, Fumio Toshiba Co Ltd Corp R&D Ctr Kawasaki Kanagawa Japan INRIA EVA Team Paris France Keio Univ Fac Sci & Technol Yokohama Kanagawa Japan

ISBN: (纸本)9781665439299

Wireless sensor networking is a key enabler of Industrial IoT. IETF (Internet Engineering Task Force) has standardized a protocol suite called 6TiSCH (IPv6 over the TSCH mode of ieee802.15.4e). 6TiSCH builds an IPv6 multi-hop wireless network with the ieee802.15.4 radio, which achieves low energy consumption and high reliability. Although network formation time is one of key performance indicators of wireless sensor networks, it has not been studied well with 6TiSCH standard protocols such as MSF (6TiSCH Minimal Scheduling Function) and CoJP (Constrained Join Protocol). In this paper, we propose a scheduling function called SF-Fastboot which shortens network formation time of 6TiSCH. We evaluate SF-Fastboot by simulation comparing with MSF, the state-of-the-art scheduling function. The simulation shows SF-Fastboot reduces network formation time by 41 % - 80 %.

关键词： 6TiSCH TSCH ieee802.15.4 Network formation Scheduling Lifetime

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Improving Energy Conservation Using Bulk Transmission over High-Power Radios in sensor Networks

Improving Energy Conservation Using Bulk Transmission over H...

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28th international conference on distributed computing systems

作者： Sengul, Cigdem Bakht, Mehedi Harris, Albert, III Abdelzaher, Tarek Kravets, Robin ASAP/INRIA UIUC CReSIS-KU

ISBN: (纸本)9781424431748

Low power radios, such as the CC2420, have been widely popular with recent sensor platforms. This paper explores the potential for energy savings from adding a high-power high-bandwidth, radio to current sensor platforms. High-bandwidth radios consume more power but significantly reduce the time for transmissions. Consequently, they offer net savings in total communication energy when there is enough data to offset wake-up energy overhead. The analysis on energy characteristics of several ieee 802.11 radios show that a feasible crossover point exists (in terms of data size) after which energy savings are possible. Based on this analysis, we present a bulk data transmission protocol for dual radio systems. The results of simulations and prototype implementation show significant energy savings at the expense of introducing acceptable delay.

关键词： Energy conservation

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Decentralizing and Adding Portability to an IoT Test-bed through Smartphones

Decentralizing and Adding Portability to an IoT Test-bed thr...

引用

9th ieee international conference on distributed computing in sensor systems (DCOSS)

作者： Nikoletseas, Sotiris Rapti, Maria Raptis, Theofanis P. Veroutis, Konstantinos Univ Patras Dept Comp Engn & Informat GR-26110 Patras Greece Comp Technol Inst & Press Diophantus CTI Patras Greece

ISBN: (纸本)9781479946181

In this work, we develop an IPv6 enabled smart building test-bed facility, by combining sensing and communication devices and functionalities. We address the Internet of Things paradigm by using diverse heterogeneous devices such as smartphones, sensor motes, NFC technology and traditional electrical devices, each one serving a specific role in the test-bed facility. Also, we extend a basic actuation component by making it self-aware, in terms of supported resources. Those enhancements allow us to enrich the test-bed's capabilities in terms of M2M communication, portability and decentralization of the actuation process. Finally, we provide a simple smart room scenario for a tunable combination of energy efficiency and comfort, which automatically adjusts the room's light level based on ambient conditions and user preferences and demonstrate the feasibility of our system.

关键词： Deployment Emerging wireless technologies Smartphones Test-beds Wireless sensor Networks Smartphone deployment Wireless sensor networks Portability communication equipment User preferences IPv6 decentralization

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Random Gossip Processes in Smartphone Peer-to-Peer Networks 15

Random Gossip Processes in Smartphone Peer-to-Peer Networks

引用

15th Annual international conference on distributed computing in sensor systems (DCOSS)

作者： Newport, Calvin Weaver, Alex Georgetown Univ Washington DC 20057 USA

ISBN: (纸本)9781728105703

In this paper, we study random gossip processes in communication models that describe the peer-to-peer networking functionality included in standard smartphone operating systems. These processes are well-understood in standard peer-to-peer network models, but little is known about their behavior in models that abstract the smartphone peer-to-peer setting. With this in mind, we begin by studying a simple random gossip process in the synchronous mobile telephone model (the most common abstraction used to study smartphone peer-to-peer systems). We prove that the simple process is actually more efficient than the best-known gossip algorithm in the mobile telephone model, which required complicated coordination among the nodes in the network. We then introduce a novel variation of the mobile telephone model that removes the synchronized round assumption, shrinking the gap between theory and practice. We prove that simple random gossip processes still converge in this setting and that information spreading still improves along with graph connectivity.

关键词： gossip distributed algorithms peer-to-peer networks

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MNP: Multihop network reprogramming service for sensor networks

MNP: Multihop network reprogramming service for sensor netwo...

引用

25th ieee international conference on distributed computing systems

作者： Kulkarni, SS Wang, LM Michigan State Univ Dept Comp Sci & Engn Software Engn & Network Syst Lab E Lansing MI 48824 USA

ISBN: (纸本)0769523315

Reprogramming of sensor networks is an important and challenging problem as it is often necessary to reprogram the sensors in place. In this paper we propose a multihop reprogramming service designed for Mica-2/XSM motes. One of the problems in reprogramming is the issue of message collision. To reduce the problem of collision and hidden terminal problem, we propose a sender selection algorithm that attempts to guarantee that in a neighborhood there is at most one source transmitting the program at a time. Further, our sender selection is greedy in that it tries to select the sender that is expected to have the most impact. We also use pipelining to enable fast data propagation. MNP is energy efficient because it reduces the active radio time of a sensor node by putting the node into "sleep" state when its neighbors are transmitting a segment that is not of interest. Finally, we argue that it is possible to tune our service according to the remaining battery level of a sensor i.e., it can be tuned so that the probability that a sensor is given the responsibility of transmitting the code is proportional to its remaining battery life.

关键词： sensor networks network reprogranuning code dissemination

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Efficient many-to-many data sharing using synchronous transmission and TDMA 13

Efficient many-to-many data sharing using synchronous transm...

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13th ieee international conference on distributed computing in sensor systems (DCOSS)

作者： Saha, Sudipta Landsiedel, Olaf Chan, Mull Choon Indian Inst Technol Bhubaneswar Bhubaneswar Orissa India Univ Chalmers Gothenburg Sweden Natl Univ Singapore Singapore Singapore

ISBN: (纸本)9781538639917

Achieving fast and efficient. many-to-many communication is one of the most complex communication problems, especially in wireless systems. A compact form of many-to-many communication in a distributed system has the potential to bring huge benefit to many distributed algorithms and protocols. Many to -many communication can he implemented as a sequential instantiations of a network wide one-to-many communication. One limitation of such an approach is that each individual instance of a one-to-many communication has to be given enough time to propagate through the whole network before the next instance. In addition, there is large overhead in generating the schedule for the sequence of individual one-to-many communications. In this work, we show that many-to-many communication can be more efficiently implemented as many parallel many-to-one communications. In this direction, we first develop an efficient TDMA based many-to-one communication module, and then use it in many-to-many setting. Our approach achieves a minimmn about 20% to 50% improvements on latency (radio-on time) over the state-of-the-art solutions in a 90-node wireless sensor network testbed.

关键词： Protocols Synchronization Schedules Time division multiple access Wireless sensor networks Wireless communication Reliability

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Maintaining Constructive Interference Using Well-Synchronized sensor Nodes 12

Maintaining Constructive Interference Using Well-Synchronize...

引用

12th ieee Annual international conference on distributed computing in sensor systems (DCOSS)

作者： Koenig, Michael Wattenhofer, Roger ETH Distributed Comp Grp Zurich Switzerland

ISBN: (纸本)9781509014590

Traditionally, achieving constructive interference (CI) required specialized timekeeping hardware. Recently, the ability and interest to employ CI distributedly at any time using groups of ordinary single antenna wireless sensor nodes have grown. In this paper, we investigate achieving CI on sensor nodes. We consider the commonly employed ieee 802.15.4 wireless standard, which uses a chip frequency of 1 MHz. This means signals need to be synchronized with an error below 0.5 microseconds to allow for CI. Hence, excellent clock synchronization between nodes as well as precise transmission timing are required. We implemented and tested a prototype addressing the implementation challenges of synchronizing the nodes' clocks up to a precision of a few hundred nanoseconds and of timing transmissions as accurately as possible. Our results show that, even after multiple minutes of sleep, our approach is able to achieve CI in over 30% of cases, in scenarios in which any influence from the capture effect can be ruled out. This leads to an increase in a packet's chance of arrival to 30-65%, compared to 0-30% when transmitting with either less synchrony or different data payload. Further, we find that 2 senders generally increase the signal power by 2-3 dB and can double the packet reception ratio of weak links.

关键词： sensor nodes

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Measuring People-Flow Through Doorways using Easy-to-Install IR Array sensors 13

Measuring People-Flow Through Doorways using Easy-to-Install...

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13th ieee international conference on distributed computing in sensor systems (DCOSS)

作者： Mohammadmoradi, Hessam Munir, Sirajum Gnawali, Omprakash Shelton, Charles Univ Houston Dept Comp Sci Houston TX 77204 USA Bosch Res & Technol Ctr Pittsburgh PA USA

ISBN: (纸本)9781538639917

People counting has many applications in smart buildings. For example, adjusting HVAC systems based on the number of occupants in each room can save a significant amount of energy. In addition, security and safety of the building can be managed by determining the number and location of occupants. Different technologies and sensing platforms have proposed for accurate and efficient people counting. However, these solutions are expensive, hard to deploy, or privacy invasive. We investigate the possibility of placing an 8 x 8 IR array sensor at the doorways and counting the number of people inside rooms. Our solution is real-time, inexpensive, privacy preserving with much less deployment constraints compared to its competitors. The proposed solution deals with realistic and dynamic changes in the sensing environment by leveraging a combination of Otsu's thresholding and modeling thermal noise distribution. We evaluated our solution via several controlled and uncontrolled real-world environments. The results show an average of 93% accuracy in estimating the number of occupants in rooms.

关键词： Temperature sensors sensor arrays Buildings Privacy Temperature Estimation Cameras

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WiDeo: One Shot Domain Adaptation for Cross-Environment WiFi-Based Activity Classification Through RF-Visual Joint Embedding 17

WiDeo: One Shot Domain Adaptation for Cross-Environment WiFi...

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17th Annual ieee international conference on distributed computing in sensor systems (ieee DCOSS)

作者： Islam, Md Tamzeed Nirjon, Shahriar Univ N Carolina Dept Comp Sci Chapel Hill NC 27515 USA

ISBN: (纸本)9781665439299

The effect of environmental change in WiFi signal is a major obstacle for generalized WiFi-based activity recognition. In this paper, we propose a novel method for adapting a WiFi-based activity classifier, that is trained on a large-scale dataset for an environment, to a new environment with only one labeled sample per activity. To this end, we propose a novel representation extraction algorithm using the supervision of visual data during the training phase. Our proposed feature extraction explicitly learns the corresponding relation between WiFi signal and movement of human body parts. For environment adaptation, we propose a framework that relies on only one labeled sample per activity class in comparison with current state-of-the-art solutions which are not suitable for few-shot adaptation. We collect data from four volunteers from five different environments and show that our proposed solution is able to achieve 28% higher accuracy than state-of-the-art solutions for environmental adaptation.

关键词： Training Visualization Adaptation models Correlation distributed databases Activity recognition Feature extraction

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