We are demonstrating a networking technology and application environment that connects highly-constrained low-power wireless embeddedsensor networks with large-scale IP networks. this technology is based on the 6LoWP...
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ISBN:
(纸本)9781595937636
We are demonstrating a networking technology and application environment that connects highly-constrained low-power wireless embeddedsensor networks with large-scale IP networks. this technology is based on the 6LoWPAN IPv6-over-802.15.4 adptation layer.
this poster shows the work-in-progress results of an effective method for predicting the residual battery energy in WSN nodes including the battery behavior. this method uses a hybrid approach consisting of a determin...
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ISBN:
(纸本)9781595937636
this poster shows the work-in-progress results of an effective method for predicting the residual battery energy in WSN nodes including the battery behavior. this method uses a hybrid approach consisting of a deterministic part by counting credit points for any operation of the sensor node and a model-based State-of-Charge (SoC) estimation based on battery voltage and temperature. It is applied for Li-Ion accumulators on modified Tmote Sky motes. For demonstration purposes the method is used for cluster head selection in a cluster-based topology formation algorithm to ensure equal distribution of the cluster head role among the network nodes based on the residual energy.
An airborne wireless sensor network (WSN) composed of bird-sized micro aerial vehicles (MAVs) enables low cost high granularity atmospheric sensing of toxic plume behavior and storm dynamics, and provides a unique thr...
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ISBN:
(纸本)9781595937636
An airborne wireless sensor network (WSN) composed of bird-sized micro aerial vehicles (MAVs) enables low cost high granularity atmospheric sensing of toxic plume behavior and storm dynamics, and provides a unique three-dimensional vantage for monitoring wildlife and ecological systems. this paper describes a complete implementation of our sensorFlock airborne WSN, spanning the development of our MAV airplane, its avionics, semi-autonomous flight control software, launch system, flock control algorithm, and wireless communication networking between MAVs. We present experimental results from flight tests of flocks of MAVs, and a characterization of wireless RF behavior in air-to-air communication as well as air-to-ground communication.
the synergy of phone sensors (microphone, camera, GPS, etc.), wireless capability, and ever-increasing device density can lead to novel people-centric applications. Unlike traditional sensor networks, the next generat...
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ISBN:
(纸本)9781595937636
the synergy of phone sensors (microphone, camera, GPS, etc.), wireless capability, and ever-increasing device density can lead to novel people-centric applications. Unlike traditional sensor networks, the next generation networks may be participatory, interactive, and in the scale of human users. Millions of global data points can be organized on a visual platform, queried, and sophistically answered through human participation. Recent years have witnessed the isolated impacts of distributed knowledge sharing (Wikipedia), social networks, sensor networks, and mobile communication. We believe that significant more impact is latent in their convergence, that can to be drawn out through innovations in applications. this demonstration,, called Micro-Blog, is a first step towards this goal.
this paper presents a framework for power-efficient detection in embeddedsensorsystems. State detection is structured as a decision tree classifier that dynamically orders the activation and adjusts the sampling rat...
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ISBN:
(纸本)9781595937636
this paper presents a framework for power-efficient detection in embeddedsensorsystems. State detection is structured as a decision tree classifier that dynamically orders the activation and adjusts the sampling rate of the sensors (termed groggy wakeup), such that only the data necessary to determine the system state is collected at any given time. this classifier can be tuned to trade-off accuracy and power in a structured, parameterized fashion. An embedded instantiation of these classifiers, including real-time sensor control, is described. An application based on a wearable gait monitor provides quantitative support for this framework. the decision tree classifiers achieved roughly identical detection accuracies to those obtained using support vector machines while drawing three times less power. Both simulation and real-time operation of the classifiers demonstrate that our multi-tiered classifier determines states as accurately as a single-trigger (binary) wakeup system while drawing as little as half as much power and with only a negligible increase in latency.
sensor networks are notoriously difficult to program, given that they encompass the complexities of both distributed and embeddedsystems. To address this problem, we present the design and implementation of a declara...
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ISBN:
(纸本)9781595937636
sensor networks are notoriously difficult to program, given that they encompass the complexities of both distributed and embeddedsystems. To address this problem, we present the design and implementation of a declarative sensor network platform, DSN: a declarative language, compiler and runtime suitable for programming a broad range of sensornet applications. We demonstrate that our approach is a natural fit for sensor networks by specifying several very different classes of traditional sensor network protocols. services and applications entirely declaratively - these include tree and geographic routing, link estimation, data collection, event tracking, version coherency, and localization. To our knowledge, this is the first time these disparate sensornet tasks have been addressed by a single high-level programming environment. Moreover, the declarative approach accommodates the desire for architectural flexibility and simple management of limited resources. Our results suggest that the declarative approach is well-suited to sensor networks, and that it can produce concise and flexible code by focusing on what the code is doing, and not on how it is doing it.
We have proposed a simple and energy-efficient communication mechanism which can organize a variety of communication depending on dynamically changing application requirements. In this demonstration, we show that our ...
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ISBN:
(纸本)9781595937636
We have proposed a simple and energy-efficient communication mechanism which can organize a variety of communication depending on dynamically changing application requirements. In this demonstration, we show that our mechanism can gather or diffuse information in accordance with application requirements in a dynamic wireless sensor network.
Querying in heterogeneous sensor networks is a challenging research issue due to a variety of real-world queries depending on users' preferences. Examples of queries are weather, nearby restaurants, navigation, et...
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ISBN:
(纸本)9781595937636
Querying in heterogeneous sensor networks is a challenging research issue due to a variety of real-world queries depending on users' preferences. Examples of queries are weather, nearby restaurants, navigation, etc. Users may ask for a breezy path starting from distinct points to distinct train stations. Sensing data collected from wide areas (city or country level) are needed to provide the real-world search as a service for users. therefore, another challenge is a collaboration of heterogenous sensor networks because deploying sensors in wide areas is impractical. sensorMap [1] collects sensing data from independent sensor networks by allowing data owners to publish their data on the web. Sensing data from all owners are sent to a centric storage in sensorMap. However, distributed data storage is likely to be an efficient solution comparing to a centric storage in which bottleneck always occurs.
this paper proposes a new sensornet protocol design goal: visibility. Visibility into behaviors at the network level will simplify debugging and ease the development process. We argue that increasing visibility is the...
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ISBN:
(纸本)9781595937636
this paper proposes a new sensornet protocol design goal: visibility. Visibility into behaviors at the network level will simplify debugging and ease the development process. We argue that increasing visibility is the responsibility of the network protocols themselves, and not solely the responsibility of existing debugging tools. We describe a quantitative visibility metric to evaluate and compare protocols, where visibility is defined as the energy cost of diagnosing the cause of a behavior in a protocol. the design and evaluation of Pull Collection Protocol, a novel multi-hop collection protocol, is an example of how to design for visibility without sacrificing throughput or node-level fairness. We also describe our optimizations for an existing protocol, Deluge, to increase its visibility and efficiency.
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