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sensors enabling automatic generation of electronic music

Sensors enabling automatic generation of electronic music

引用

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

作者： Ahmad Mostafa Jung Hyan Jun Dharma P. Agrawal Mara Helmuth Department of Computer Science University of Cincinnati USA College-Conservatory of Music University of Cincinnati USA

In this demo, a new application for the wireless sensor networks (WSN) is presented. this is the first time WSN is used to in the music field, where the music is being manipulated and changed according to the movement of the dancer. Twenty-three tmote sensors have been deployed on a dancing stage, and two sensors were attached to the arms of each dancer. Information collected from sensors deployed on the stage are being sent and processed at a central location where the music being played is manipulated. this project is the first phase of collaboration in a multi-disciplinary research between the Computer Science department and the College-Conservatory of Music at the University of Cincinnati.

关键词： sensors Wireless sensor networks Base stations Wireless communication Art Educational institutions Collaboration

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Energy-based task load balancing in wireless sensor networks

Energy-based task load balancing in wireless sensor networks

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

作者： Hady S. AbdelSalam Stephan Olariu Computer Science Department Old Dominion University Norfolk VA USA

We investigate how to maximize network lifetime by devising a task assignment protocol that balances task load on sensors based on their remaining energy. First, we show that energy-unaware protocols can excessively assign tasks to a set of sensors more than others. Consequently, the energy of those heavily loaded sensors will be depleted much faster than lightly loaded ones. this results in reducing network density around heavily loaded sensors and eventually creates energy holes that isolate the network into separated islands. this kind of behavior has its negative impacts on network durability and reliability. To avoid these problems, we propose a management protocol that assigns tasks to sensors based on their remaining energy so that energy consumption is almost even among network sensors.

关键词： sensors Protocols sensor phenomena and characterization Energy states Radiation detectors Equations Interference

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Compute-and-Forward: Error-Correcting Codes for Wireless Network Coding on the Physical Layer

Compute-and-Forward: Error-Correcting Codes for Wireless Net...

引用

ieee Annual Communications Society sensor, Mesh and Ad Hoc Communications and Networks SECON Workshops

作者： Bobak Nazer Michael Gastpar BerkeleyWireless Foundations CenterDepartment of EEC University of California Berkeley CA USA

By exploiting properties of the wireless medium, network coding may provide even larger throughput increases for wireless networks than possible for wired networks. In particular, simultaneously transmitted signals are seen as noisy linear combinations at the antennas of receivers. It is thus quite tempting to use the physical layer to directly perform network coding "on the air". However, classical communication schemes are ill-suited for carrying out these distributed computations and uncoded transmission accumulates noise with multiple transmissions. In previous work, we have developed a coding technique, computation codes, for reliable, efficient computation over noisy channels. We have also demonstrated how to use these codes to run a network code on finite-field and Gaussian multiple-access networks. In this note, we survey our recent work on reliable computation over channels and show how it can be applied to perform network coding.

关键词： Computer networks Physics computing Error correction codes Wireless networks Physical layer Network coding throughput Receiving antennas distributed computing Telecommunication network reliability

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A quality-of-information-aware framework for data models in wireless sensor networks

A quality-of-information-aware framework for data models in ...

引用

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

作者： Urs Hunkeler Paolo Scotton IBM Zurich Research Laboratory

Wireless sensor networks are used to monitor a given environment, such as indoor heating conditions or the micro-climate of glaciers. they offer a low-cost solution that provides a high data density. Usually the user of such a sensor network has a good idea of how, knowing the environment, the sensed values should behave. this idea can be expressed as a data model. Such models can be used to detect anomalies, compress data, or combine data from many inexpensive sensors to increase the quality of the measurements. this paper presents a framework to process arbitrary sensor-network data models. the framework can then be used to distribute the model processing into the wireless sensor network. Quality of information criteria are used to determine the performance of the models. A prototype of the framework is presented together with a comparison of two existing stochastic data model approaches for wireless sensor networks.

关键词： Data models Wireless sensor networks Computational modeling Biological system modeling Accuracy Predictive models Mathematical model

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Airtime Deficit Round Robin (ADRR) packet scheduling algorithm

Airtime Deficit Round Robin (ADRR) packet scheduling algorit...

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

作者： Roberto Riggio Daniele Miorandi Imrich Chlamtac Create-Net International Research Center Trento Italy

In this paper we present airtime deficit round robin (ADRR) a novel scheduling algorithm for ieee 802.11-based wireless mesh networks. ADRR enhances the deficit round robin scheduling discipline by taking into account the channel quality experienced by the transmitting node. the devised algorithm addresses the ieee 802.11 performance anomaly, preventing a node which experiences poor channel conditions from monopolizing the wireless medium lowering the performance of the whole system. the proposed approach combines link scheduling with measurable routing metrics typically available in WMNs. Results show the ability of the ADRR scheduler to achieve performance isolation among links characterized by heterogeneous channel conditions. the proposed solution has been implemented and tested over an ieee 802.11-based wireless mesh network. Source code has been released under a BSD License making it fully available to the research community.

关键词： ieee 802.11 Standards Probes Radiation detectors Wireless communication Routing Round robin throughput

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Polynomial-Time Optimal distributed Algorithm for Dynamic Allocation of Discrete Resources

Polynomial-Time Optimal Distributed Algorithm for Dynamic Al...

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ieee Communications Society conference on sensor and Ad Hoc Communications and Networks (SECON)

作者： Ratul K. Guha Saikat Ray Telcordia Technologies Inc. Piscataway NJ USA University of Bridgeport Bridgeport CT USA

Today a growing number of applications that operate in dynamic environments use distributed systems. Often, one or more constrained resources need to be allocated across such systems. In addition, for a number of important applications, the resources to be allocated are discrete quantities and the demand profile is intrinsically location and time dependent (thus pre-computating the resource allocation problem off-line is inadequate). We model such systems using graphs - vertices representing the sites and edges capturing locality - where each vertex is associated with the a pair of (integer) numbers representing the current and the required level of a resource. We seek on-the-fly reallocation of resources that satisfy the demand at each node, if it is feasible to do so, while minimizing a given metric of interest, such as the total distance traveled, maximum disruption time, etc. Due to integrality constraints, one expects such a problem to be NP-hard. However, we show that the matrix representing constraints of the problem satisfies the Total Unimodularity property and hence the problem is solvable in polynomial time. We propose a distributed algorithm that employs only local communications. We characterize the proposed algorithm and by numerical performance evaluation, show that it significantly outperforms known heuristic algorithms.

关键词： Polynomials distributed algorithms Resource management Heuristic algorithms Aerospace industry Routing Scalability Costs Context modeling Usability

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Quality of information: An empirical approach

Quality of information: An empirical approach

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

作者： Erol Gelenbe Laurence Hey Intelligent Systems and Networks Group Department of Electrical and Electronic Engineering Imperial College London London UK

In this paper we examine the quality of information (QoI) at the output of a real wireless sensor network by considering the difference between the monitored environment and the interpreted data produced by the network. Using practical examples in an experimental setting, we hope to shed light on the concept of QoI and on the manner of estimating and evaluating it. We use a real wireless network in combination with simulated events, to help us formulate and understand the concept of QoI and its associated technical questions. Using algorithms such as trilateration and clustering to interpret the outputs of the sensor network, we explore several definitions of QoI, including the peak signal to noise ratio. Furthermore we investigate the impact that different packet transmission approaches have on the QoI. We show that QoI is time-varying, and that in-network processing allows QoI levels to be maintained while reducing network load.

关键词： PSNR Tin Distance measurement Monitoring Delay Wireless sensor networks Clustering algorithms

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Why is IPSec a viable option for wireless sensor networks

Why is IPSec a viable option for wireless sensor networks

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

作者： Jorge Granjal Ricardo Silva Edmundo Monteiro Jorge Sa Silva Fernando Boavida University of Coimbra Portugal

Many issues still remain to be addressed in order to achieve acceptable security in wireless sensor networks (WSNs). this necessity, together with the adoption of IPv6 on WSNs being defined at the 6lowpan working group of the IETF, motivates our investigation on the feasibility of the application of IPSec on sensor nodes. IPSec is already part of IPv6, which makes it a natural candidate to be directly employed or adapted for WSNs. We discuss results obtained from practical experiments on the usage of cryptographic algorithms typically employed within IPSec in real sensor nodes. We analyze the security and performance tradeoffs involved when employing cryptography measures in WSNs, also in the context of their usage side-by-side with IPv6. the results obtained show that the adoption of a security architecture such as IPSec is viable, and also point towards the successful design and deployment of a security architecture for WSNs.

关键词： Security Wireless sensor networks Cryptography Memory management Energy consumption three dimensional displays Random access memory

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Time-Based Privacy Protection for Multi-attribute Data in WSNs

Time-Based Privacy Protection for Multi-attribute Data in WS...

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international conference on Parallel and distributed systems (ICPADS)

作者： Baowei Wang Xingming Sun Xinbing Wang Bin Xiao School of Computer & Communication Hunan University Changsha China Department of Electronic Engineering Shanghai Jiaotong university Shanghai China Department of Computing Hong Kong Polytechnic University Hong Kong China

Wireless sensor networks become ubiquitous to collect people's information in many people-centric applications, such as, health care, smart space and public safety. Because any misusage of these personal data might result in the leakage of privacy, it is expected that the data requesters can only access to the data what they are entitled to read. Based on a revised hash chain technique, we proposed a novel time-based privacy protection (TPP) scheme for multi-attribute data in WSNs. In the scheme, all the personal data are divided into 2-D subspaces representing data attribute and generation time. Data in each subspace is encrypted with a sub-key before its transmission to the sink. Anyone who wants to read data attribute at a particular time must get the corresponding sub-key from the sender node. TPP can generate a sub-key for data in each subspace in an efficient manner in terms of less sub-key generation time and low memory space usage. the simulation results show that the schemes can be applied to the resource limited WSNs efficiently.

关键词： Data privacy Protection Wireless sensor networks Space technology Computer networks Concurrent computing distributed computing Pervasive computing Medical services Health and safety

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Fault-Tolerant Algoritms for Detecting Event Regions in Wireless sensor Networks Using Statistical Hypothesis Test

Fault-Tolerant Algoritms for Detecting Event Regions in Wire...

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international conference on Parallel and distributed systems (ICPADS)

作者： Donglei Cao Beihong Jin Jiannong Cao Chinese Academy of Sciences China Institute of Software of Chinese Academy of Sciences China Department of computing Hong Kong Polytechnic University Hong Kong China

Detecting event regions in a monitored environment is a canonical task of wireless sensor networks (WSNs). It is a hard problem because sensor nodes are prone to failures and have scarce energy. In this paper, we seek distributed and localized algorithms for fault-tolerant event region detection. Most existing algorithms only assume that events are spatially correlated, but we argue that events are usually both spatially and temporally correlated. By examining the temporal correlation of sensor measurements, we propose two detection algorithms by applying statistical hypothesis test (SHT). Our analyses show that SHT-based algorithm is more accurate in detecting event regions. Moreover, it is more energy efficient since it gets rid of frequent measurement exchanges. In order to improve the capability of fault recognition, we extend SHT-based algorithm by examining both spatial and temporal correlations of sensor measurements, and our analyses show that extended SHT-based algorithm can recognize almost all faults when sensor network is densely deployed.

关键词： Fault tolerance Event detection Fault detection Wireless sensor networks Testing Algorithm design and analysis Condition monitoring Detection algorithms Energy efficiency Energy measurement

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