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Optimal rate allocation of compressed data streams in multihop sensor networks

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5th ieee international conference on distributed computing in sensor systems, dcoss 2009

作者： Lin, Chun Lung Wang, Jia Shung Department of Computer Science National Tsing Hua Univeristy Hsinchu Taiwan

ISBN: (纸本)3642020844

Consider that a transform coder is installed at each sensor node. In this paper, an analytical framework for optimal rate allocation of compressed data streams in wireless multihop sensor networks is presented. Compact, necessary and sufficient closed-form solution to the optimal rate allocation problem is derived based on the lower rate approximation of rate distortion function. Extensive simulations were conducted using real-world data traces, LEM and Intel Lab datasets. the simulation results show that the information of compression ratios of sensor data can be utilized to optimally distributing the limited transmission rate among sensors to greatly reduce the amount of transmitted data. Moreover, the performance gain of the optimal rate allocation increases exponentially at lower rates, lower compression ratios of sensor data and larger variation between compression ratios. © 2009 Springer Berlin Heidelberg.

关键词： sensor nodes

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Achieving High Lifetime and Low Delay in Very Large sensors Networks Using Mobile Sinks

Achieving High Lifetime and Low Delay in Very Large Sensors ...

引用

international conference on distributed computing in sensor systems (dcoss)

作者： Wint Yi Poe Michael Beck Jens B. Schmitt Distributed Computer Systems Laboratory (DISCO) University of Kaiserslautern Germany

For smaller scale wireless sensor networks (WSN) it has been clearly shown that a single mobile sink can be very beneficial with respect to the network lifetime. Yet, how to plan the trajectories of many mobile sinks in very large WSNs in order to simultaneously achieve lifetime and delay goals has not been treated so far. In this paper, we delve into this difficult problem and propose a heuristic framework using multiple orbits for the sinks' trajectories. the framework is carefully designed based on geometric arguments to achieve both, high lifetime and low delay. In simulations, we compare two different instances of our framework, one conceived based on a load balancing argument and one based on a distance minimization argument, with a set of different competitors spanning from statically placed sinks to battery-state aware strategies. We find our heuristics to perform very favorably: both instances outperform the competitors in both, lifetime and delay. Furthermore, and probably even more importantly, the heuristic, while keeping its good delay and lifetime performance, scales well with an increasing number of sinks.

关键词： Orbits Delay Wireless sensor networks Trajectory Euclidean distance Mobile communication Energy consumption

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Proceedings - ieee Congress on Cybermatics: 2022 ieee international conferences on Internet of things, ithings 2022, ieee Green computing and Communications, GreenCom 2022, ieee Cyber, Physical and Social computing, CPSCom 2022 and ieee Smart Data, SmartData 2022

Proceedings - IEEE Congress on Cybermatics: 2022 IEEE Intern...

引用

2022 ieee Congress on Cybermatics: 15th ieee international conferences on Internet of things, ithings 2022, 18th ieee international conferences on Green computing and Communications, GreenCom 2022, 2022 ieee international conference on Cyber, Physical and Social computing, CPSCom 2022 and 8th ieee international conference on Smart Data, SmartData 2022

ISBN: (纸本)9781665454179

the proceedings contain 96 papers. the topics discussed include: distributed MQTT brokers at network edges: a study on message dissemination;multi-stage low error localization based on krill herd optimization algorithm in WSNs;a decentralized framework with dynamic and event-driven container orchestration at the edge;a novel harmony search cat swarm optimization algorithm for optimal bridge sensor placement;on-ramp merging for connected autonomous vehicles using deep reinforcement learning;on-device training of deep learning models on edge microcontrollers;user position-based wireless sensor network deployment algorithm;edge-cloud cooperation for DNN inference via reinforcement learning and supervised learning;node deployment and confident information coverage for WSN-based air quality monitoring;and demand-oriented allocation with fairness in multi-operator dynamic spectrum sharing systems.

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Quest Method for Organizing Cloud Processing of Airborne Laser Scanning Data 8

Quest Method for Organizing Cloud Processing of Airborne Las...

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8th ieee Int Conf on Advanced Optoelectron and Lasers (CAOL) / Sci Workshop on Data Sci in Modern Optoelectronics and Laser Engineering (DSMOLE) / 16th Sci Workshop on Measurement Uncertainty - Scientific, Normative, Appl and Methodical Aspects (UM)

作者： Vitalii, Tkachov Mykhailo, Hunko Kharkiv Natl Univ Radio Elect Elect Comp Dept Kharkiv Ukraine

ISBN: (纸本)9781728118147

Nowadays, the processing of data obtained as a result of airborne laser scanning by a group of unmanned aerial vehicles includes up to eight different stages. From the point of view of organizing such processing, it is reasonable to use modern cloud technologies. the paper proposes a new method for processing this type of data based on the social model of completing game quests. Portions of data arrive at a computing system consisting of several clouds where, in turn, multifunctional SaaS nodes operate. Each of the nodes can process one data portion once, which allows to exclude the principle of exclusive use of one node for all stages of processing a data portion. the paper proposes an original algorithm for determining the optimal node for the next stage of processing, which takes into account: the time of data portions movement between SaaS nodes, in fact, processing and waiting in the node queue. Due to carried out experiments, it was found that the implementation of the developed quest method allows to reduce the workload of SaaS nodes by the uniform distribution of processing between all nodes, which was to an average of 30% Additionally, in the case when the number of processing nodes is less than three, the efficiency of the method decreases to zero. this paper suggests that the ques method can also be used on board of the nodes of a flying sensor network during airborne laser scanning of the area in rapidresponse systems.

关键词： cloud computing laser radar distributed processing routing mobile ad hoc networks

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A Cross-Layer Design for Decentralized Detection in Tree sensor Networks

A Cross-Layer Design for Decentralized Detection in Tree Sen...

引用

international conference on distributed computing in sensor systems (dcoss)

作者： Ashraf Tantawy Xenofon Koutsoukos Gautam Biswas Institute for Software Integrated Systems (ISIS) Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN USA

the design of wireless sensor networks for detection applications is a challenging task. On one hand, classical work on decentralized detection does not consider practical wireless sensor networks. On the other hand, practical sensor network design approaches that treat the signal processing and communication aspects of the sensor network separately result in sub optimal detection performance because network resources are not allocated efficiently. In this work, we attempt to cross the gap between theoretical decentralized detection work and practical sensor network implementations. We consider a cross-layer approach, where the quality of information, channel state information, and residual energy information are included in the design process of tree-topology sensor networks. the design objective is to specify which sensors should contribute to a given detection task, and to calculate the relevant communication parameters. We compare two design schemes: (1) direct transmission, where raw data are transmitted to the fusion center without compression, and (2) in-network processing, where data is quantized before transmission. For both schemes, we design the optimal transmission control policy that coordinates the communication between sensor nodes and the fusion center. We show the performance improvement for the proposed design schemes over the classical decoupled and maximum throughput design approaches.

关键词： Wireless sensor networks Wireless communication Quantization Media Access Protocol Random variables Optimization

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Demo: RhythmEdge: Enabling Contactless Heart Rate Estimation on the Edge 8

Demo: RhythmEdge: Enabling Contactless Heart Rate Estimation...

引用

8th ieee international conference on Smart computing (SMARTCOMP)

作者： Hasan, Zahid Dey, Emon Ramamurthy, Sreenivasan Ramasamy Roy, Nirmalya Misra, Archan Univ Maryland Baltimore Cty Dept Informat Syst Ctr Real Time Distributed Sensing & Auton CARDS Mobile Pervas & Sensor Comp Lab Baltimore MD 21228 USA Singapore Management Univ Sch Comp & Informat Syst Singapore Singapore

ISBN: (纸本)9781665481526

In this demo paper, we design and prototype RhythmEdge [1], a low-cost, deep-learning-based contact-less system for regular HR monitoring applications. RhythmEdge benefits over existing approaches by facilitating contact-less nature, real-time/offline operation, inexpensive and available sensing components, and computing devices. Our RhythmEdge system is portable and easily deployable for reliable HR estimation in moderately controlled indoor or outdoor environments. RhythmEdge measures HR via detecting changes in blood volume from facial videos (Remote Photoplethysmography;rPPG) and provides instant assessment using off-the-shelf commercially available resource-constrained edge platforms and video cameras. We demonstrate the scalability, flexibility, and compatibility of the RhythmEdge by deploying it on three resource-constrained platforms of differing architectures (NVIDIA Jetson Nano, Google Coral Development Board, Raspberry Pi) and three heterogeneous cameras of differing sensitivity, resolution, properties (web camera, action camera, and DSLR). RhythmEdge further stores longitudinal cardiovascular information and provides instant notification to the users. We thoroughly test the prototype stability, latency, and feasibility for three edge computing platforms by profiling their runtime, memory, and power usage.

关键词： Heart rate Volume measurement Prototypes Estimation Cameras Ubiquitous computing Real-time systems

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MOB-TOSSIM: An Extension Framework for TOSSIM Simulator to Support Mobility in Wireless sensor and Actuator Networks

MOB-TOSSIM: An Extension Framework for TOSSIM Simulator to S...

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international conference on distributed computing in sensor systems (dcoss)

作者： Abdelouahid Derhab Fatma Ounini Badis Remli Department of Theories and Computer Engineering CERIST research center Algiers Algeria Department of Computer Science USTHB university Algiers Algeria

Recently, there has been considerable research on using mobility in wireless sensor and actor networks (WSANs) to assist in the deployment of nodes and meet the sensing, communication, and actuation coverage requirements. One of the well-know simulators used to evaluate the performance of wireless sensor networks is TOSSIM. It has the advantage that its code can also run in real systems, and hence it allows better comparison between experimental and simulation results. However, it is designed to simulate only static sensor networks. In this paper, we propose a classification scheme that categorizes the mobility models in WSANs. Based on this classification, we design and implement MOB-TOSSIM, the first extension framework to TOSSIM that supports mobility in WSNs and WSANs. MOB-TOSSIM implements three components: (1) a set of probabilistic and controlled mobility models, (2) an extended and modified version of Power TOSSIM that includes the energy consumption due to mobility and radio transmission, and (3) a radio component based on a realistic propagation model. Experiment results show that MOB-TOSSIM is scalable with respect to network size and node speed, as it incurs an acceptable additional execution time compared to TOSSIM.

关键词： Robot sensing systems Wireless sensor networks Mobile communication Radio frequency Wireless communication Probabilistic logic Data models

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Adaptive Synchronization Control with Multi-level Buffer in Wireless Multimedia sensor Networks

Adaptive Synchronization Control with Multi-level Buffer in ...

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international conference on distributed computing in sensor systems (dcoss)

作者： Guotao Zhao Huadong Ma Yan Sun Hong Luo Liang Liu Beijing Key Laboratory of Intelligent Telecommunication Software and Multimedia Beijing University of Posts and Telecommunications Beijing China

In Wireless Multimedia sensor Networks (WMSNs), data fusion and collaborative in-network processing operations often require effective multimedia synchronization control. Extensive researches have been done in the traditional networks. Most of these works assume that there exists a powerful synchronization controller in the network. However, for WMSNs, the in-network processing of the multimedia content is usually performed based on the resource-constrained sensors. Traditional synchronization control algorithms fail to run on the low-end hardware platform. In this paper, we propose an adaptive synchronization control scheme with multi-level buffer to address this problem. Main contributions of this paper are as follows. (i) To overcome the resource constraint of WMSNs, we perform the synchronization control in a distributed way by combining the sensors in the stream transmission path. (ii) By evaluating the current network state, we adjust the level number of the buffer adaptively to balance the delay and delay jitter. (iii) through analyzing the buffer state of each level, we propose an efficient packet scheduling scheme to reduce the delay jitter actively. (iv) We implement the proposed scheme and verify its effectiveness in our practical WMSNs platform. the experiment results show that the proposed scheme can maintain the streams synchronization effectively with the low-end sensors.

关键词： Synchronization Jitter Delay Multimedia communication Process control Streaming media Media

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BANMAC: An Opportunistic MAC Protocol for Reliable Communications in Body Area Networks

BANMAC: An Opportunistic MAC Protocol for Reliable Communica...

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international conference on distributed computing in sensor systems (dcoss)

作者： K. Shashi Prabh Fernando Royo Stefano Tennina Teresa Olivares Center for Real-Time Systems Research School of Engineering Polytechnic Institute of Porto Portugal Albacete Research Institute of Informatics University of Castilla La Mancha Spain

We consider reliable communications in Body Area Networks (BAN), where a set of nodes placed on human body are connected using wireless links. In order to keep the Specific Absorption Rate (SAR) as low as possible for health safety reasons, these networks operate in low transmit power regime, which however, is known to be error prone. It has been observed that the fluctuations of the Received Signal Strength (RSS) at the nodes of a BAN on a moving person show certain regularities and that the magnitude of these fluctuations are significant (5 - 20 dB). In this paper, we present BANMAC, a MAC protocol that monitors and predicts the channel fluctuations and schedules transmissions opportunistically when the RSS is likely to be higher. the MAC protocol is capable of providing differentiated service and resolves co-channel interference in the event of multiple co-located BANs in a vicinity. We report the design and implementation details of BANMAC integrated with the ieee 802.15.4 protocol stack. We present experimental data which show that the packet loss rate (PLR) of BANMAC is significantly lower as compared to that of the ieee 802.15.4 MAC. For comparable PLR, the power consumption of BANMAC is also significantly lower than that of the ieee~802.15.4. For co-located networks, the convergence time to find a conflict-free channel allocation was approximately 1 s for the centralized coordination mechanism and was approximately 4 s for the distributed coordination mechanism.

关键词： ieee 802.15 Standards Peer to peer computing Schedules Media Access Protocol Prediction algorithms Payloads

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Optimal Relay Placement for Indoor sensor Networks

Optimal Relay Placement for Indoor Sensor Networks

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international conference on distributed computing in sensor systems (dcoss)

作者： Cuiyao Xue Yanmin Zhu Lei Ni Minglu Li Bo Li Department of Computer Science and Engineering Shanghai Jiaotong University China

To many sensor networks, the robust operation depends on deploying relays to ensure wireless coverage. this paper considers the crucial problem of optimal relay placement for wireless sensor networks in indoor environments. the placement of relays is essential for ensuring communication quality and data collection. A number of existing algorithms have been proposed for ensuring full sensing coverage and network connectivity. these algorithms can hardly be applied to indoor environments because of the complexity of indoor environments, in which a radio signal can be dramatically degraded by obstacles like walls. We firstly theoretically prove that the indoor relay placement problem is NP-hard. We then predict radio coverage of a given relay deployment in indoor environments, and then propose a efficient greedy algorithm for computing the relay deployment locations for required coverage quality. this algorithm is proved to provide a H n factor approximation to the theoretical optimum, where H n = 1 + 1/2 + ⋯ + 1/n = ln(n) + 1, and n is the number of all grid points. Experimental results demonstrate the proposed algorithm achieves better performance than two other algorithms. To our knowledge, our work is the very first that study the optimal relay placement problem for sensor networks in complex indoor environments.

关键词： Relays Indoor environments Economic indicators Approximation algorithms Algorithm design and analysis sensors Approximation methods

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