the Java programming language has potentially significant advantages for wireless sensor nodes but there is currently no feature-rich, open source virtual machine available. In this paper we present Darjeeling, a syst...
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ISBN:
(纸本)9781595939906
the Java programming language has potentially significant advantages for wireless sensor nodes but there is currently no feature-rich, open source virtual machine available. In this paper we present Darjeeling, a system comprising offline tools and a memory efficient run-time. the offline post-compiler tool analyzes, links and consolidates Java class files into loadable modules. the runtime implements a modified Java VM that supports multithreading and is designed specifically to operate in constrained execution environments such as wireless sensor network nodes and supports inheritance, threads, garbage collection, and loadable modules. We have demonstrated Java running oil AVR128 and MSP430 microcontrollers at speeds of up to 70,000 JVM instructions per second.
Most debris flow monitoring systems deployed today use indirect means to track information regarding debris flows. In this work, we introduce a novel debris flow monitoring system for in-situ and direct tracking of de...
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ISBN:
(纸本)9781595939906
Most debris flow monitoring systems deployed today use indirect means to track information regarding debris flows. In this work, we introduce a novel debris flow monitoring system for in-situ and direct tracking of debris flows in real-time. the core idea is to throw wireless sensors into the debris flows and collect flow information as they move along. We will describe the design of the wireless sensors and present some preliminary performance results.
this paper will describe current and ongoing developments of wire less-connected RFID reader systems for evaluation of a passive user localization system. A two-tier architecture of different wireless-connected RFID r...
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ISBN:
(纸本)9781595939906
this paper will describe current and ongoing developments of wire less-connected RFID reader systems for evaluation of a passive user localization system. A two-tier architecture of different wireless-connected RFID readers will be introduced. On the lower level, i.e. the first tier, several wireless technologies can co-exist using different kinds of communication technologies to connect different RFID readers. these technologies are connected through a fully meshed WiFi/WLAN network to bring them into the IP world. this IP infrastructure is the second tier, built up on IEEE 802.11.
We present the design and deployment results for PosNet - a large-scale, long-duration sensor network that gathers summary position and status information from mobile nodes. the mobile nodes have a fixed-sized memory ...
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ISBN:
(纸本)9781595939906
We present the design and deployment results for PosNet - a large-scale, long-duration sensor network that gathers summary position and status information from mobile nodes. the mobile nodes have a fixed-sized memory buffer to which position data is added at a constant rate, and from which data is downloaded at a non-constant rate. We have developed a novel algorithm that performs online summarization of position data within the buffer, where the algorithm naturally accommodates data input and output rate mismatch, and also provides a delay-tolerant approach to data transport. the algorithm has been extensively tested in a large-scale long-duration cattle monitoring and control application.
We present KleeNet, a Klee based bug hunting tool for sensor network applications before deployment. KleeNet automatically tests code for all possible inputs, ensures memory safety, and integrates well into TinyOS bas...
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We present a macroprogramming framework called MacroLab that offers a vector programming abstraction similar to Matlab for Cyber-Physical systems (CPSs). the user writes a single program for the entire network using M...
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ISBN:
(纸本)9781595939906
We present a macroprogramming framework called MacroLab that offers a vector programming abstraction similar to Matlab for Cyber-Physical systems (CPSs). the user writes a single program for the entire network using Matlab-like operations such as addition, find, and max. the framework executes these operations across the network in a distributed fashion, a centralized fashion, or something between the two - whichever is most efficient for the target deployment. We call this approach deployment-specific code decomposition (DSCD). MacroLab programs can be executed on mote-class hardware such as the Telos [24] motes. Our results indicate that MacroLab introduces almost no additional overhead in terms of message cost, power consumption, memory footprint, or CPU cycles over TinyOS programs.
the successful deployment of a wireless sensor network is a difficult task, littered with traps and pitfalls. Even a functional network does not guarantee gathering meaningful data. In sensorScope, with its multiple c...
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ISBN:
(纸本)9781595939906
the successful deployment of a wireless sensor network is a difficult task, littered with traps and pitfalls. Even a functional network does not guarantee gathering meaningful data. In sensorScope, with its multiple campaigns in various environments (e.g., urban, high-mountain), we have acquired much knowledge in planning, conducting, and managing real-world sensor network deployments. In this paper, we share our experience by stepping through the entire process, from the preparatory hard- and software development to the actual field deployment. Illustrated by numerous real-life examples, excerpted from our own experience, we point out many potential problems along this way and their possible solutions. We also indicate the importance of a close interaction withthe end-user community in planning and running the network, and finally exploiting the data.
With emerging IPv6-based standards such as 6LowPAN and ISA-100a, full IPv6sensor networks are the next major step. With millions of deployed embedded IPv6 devices, interoperability is of major importance, both within...
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ISBN:
(纸本)9781595939906
With emerging IPv6-based standards such as 6LowPAN and ISA-100a, full IPv6sensor networks are the next major step. With millions of deployed embedded IPv6 devices, interoperability is of major importance, both within the sensor networks and between the sensors and the Internet hosts. We present uIPv6, the first IPv6 stack for memory-constrained devices that passes all Phase-1 IPv6 Ready certification tests. this is an important step for end-to-end interoperability between IPv6sensors and any IPv6 capable device. To allow widespread community adoption, we release uIPv6 under a permissive open source license that allows both commercial and non-commercial use.
the scale of weather monitoring is limited by the cost of the automatic weather stations (AWS), which is mainly the cost of high precision instruments and long-distance wireless telecommunication equipments. We propos...
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ISBN:
(纸本)9781595939906
the scale of weather monitoring is limited by the cost of the automatic weather stations (AWS), which is mainly the cost of high precision instruments and long-distance wireless telecommunication equipments. We propose a wireless sensor network (WSN) based AWS, which takes advantage of the low-cost, real-time and infrastructure-free characteristics of WSN [1]. We can therefore extend the scale of weather monitoring without increasing the number of telecommunication equipments. this WSN-based AWS is able to cover a plane and gather multiple sets of weather measurements in real-time at a better data resolution.
Predictive environmental sensor networks provide complex engineering and systems challenges. these systems must withstand the event of interest, remain functional over long time periods when no events occur, cover lar...
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ISBN:
(纸本)9781595939906
Predictive environmental sensor networks provide complex engineering and systems challenges. these systems must withstand the event of interest, remain functional over long time periods when no events occur, cover large geographical regions of interest to the event, and support the variety of sensor types needed to detect the phenomenon. Prediction of the phenomenon on the network complicates the system further, requiring additional computation on the microcontrollers and utilizing prediction models that are not typically designed for sensor networks. this paper describes a system architecture and deployment to meet the design requirements and to allow model-driven control, thereby optimizing the prediction capability of the system. We explore the application of river flood prediction rising this architecture, describing our work on a centralized form of the prediction model, network implementation, component testing and infrastructure development in Honduras, deployment on a river in Massachusetts, and results of the field experiments. Our system uses only a small number of nodes to cover basins of 1000-10000 km(2) using an unique heterogeneous communication structure to provide real-time sensed data, incorporating self-monitoring for failure, and adapting measurement schedules to capture events of interest.
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