With the MEMS revolution in full swing, microsensors are now following manufacturing curves that are at least related to Moore's Law. Combined with the push for low power communication and computation coming from ...
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With the MEMS revolution in full swing, microsensors are now following manufacturing curves that are at least related to Moore's Law. Combined with the push for low power communication and computation coming from the handheld community, this enables an exciting new field of low-cost, high-performance wireless sensor networks. This talk will address some of the practical and physical limits associated with miniaturization of wireless sensor networks.
Data distribution in embedded real-time sensor networks requires new protocols and programming environments that achieve time-sensitive message delivery and provide useful abstractions to the application programmer At...
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ISBN:
(纸本)0769519210
Data distribution in embedded real-time sensor networks requires new protocols and programming environments that achieve time-sensitive message delivery and provide useful abstractions to the application programmer Attainment of these goals requires changes to multiple layers of the communication protocol stack. In this paper we review a protocol suite developed by the authors for data communication in embedded sensor networks. It takes into account time constraints and exports attribute-based connections that are tightly integrated with properties of the monitored environment. A programming language is described that allows external physical objects to be represented as first class abstractions in the computing system. The language facilitates writing monitoring applications. The system was implemented on a prototypical sensor network based on MICA motes.
We present an architectural framework, Garnet, which provides a data stream centric abstraction to encourage the manipulation and exploitation of data generated in sensor networks. By providing middleware services to ...
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ISBN:
(纸本)0769519210
We present an architectural framework, Garnet, which provides a data stream centric abstraction to encourage the manipulation and exploitation of data generated in sensor networks. By providing middleware services to allow mutually-unaware applications to manipulate sensor behaviour a scalable, extensible platform is provided. We focus on sensor networks with transmit and receive capabilities as this combination poses greater challenges for managing and distributing sensed data. Our approach allows simple and sophisticated sensors to coexist, and allows data consumers to be mutually unaware of each other This also promotes the use of middleware services to mediate among consumers with potentially conflicting demands for shared data. Garnet has been implemented in Java, and we report on our progress to date and outline some likely scenarios where the use of our distributed architecture and accompanying middleware support enhances the task of sharing data in sensor network environments.
Exploiting autonomic adaptation in defending a distributed application is a relatively new research area. We describe how the QuO adaptive middleware was used to implement auto-adaptive defenses ranging from simple ra...
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ISBN:
(纸本)0769519210
Exploiting autonomic adaptation in defending a distributed application is a relatively new research area. We describe how the QuO adaptive middleware was used to implement auto-adaptive defenses ranging from simple rapid-response sensor-actuator tactics to more sophisticated containment and outrun strategies. In addition, we report on two experiments where live red team attacks were used to evaluate our auto-adaptive defense technology.
The proceedings contains 75 papers. Topics discussed include self-stabilizing systems, sensor networks and energy management, peer to peer services, distributed algorithms, multimedia streaming, secure data sharing, q...
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The proceedings contains 75 papers. Topics discussed include self-stabilizing systems, sensor networks and energy management, peer to peer services, distributed algorithms, multimedia streaming, secure data sharing, quality of service, internet protocols, middleware communication services, fault tolerant systems, ubiquitous computing, network security, real time systems, web servers, middleware and interoperability, formal methods, Ad hoc network protocols, peer to peer infrastructure, synchronization, wide area distributedcomputing, mobile agents, program/software analysis, wireless access control and scalable data services.
This paper describes a set of characteristics that partially make up the problem space for real-time data distribution. The characteristics are divided into three groups: system characteristics, real-time characterist...
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ISBN:
(纸本)0769519210
This paper describes a set of characteristics that partially make up the problem space for real-time data distribution. The characteristics are divided into three groups: system characteristics, real-time characteristics, and data characteristics. The paper describes each of the characteristics, and then illustrates them with two current proposed solutions to real-time data distribution problem.
Energy is one of the most critical constraints for sensor network applications. In this paper, we exploit the localized prediction paradigm for power-efficient object tracking sensor network. Localized prediction cons...
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The Bluetooth wireless technology is an emerging technology originally designed as a short-range connectivity solution for personal, portable, and handheld electronic devices. This paper briefly presents the functiona...
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ISBN:
(纸本)0769519210
The Bluetooth wireless technology is an emerging technology originally designed as a short-range connectivity solution for personal, portable, and handheld electronic devices. This paper briefly presents the functionality and the architecture of an indoor positioning service based on this technology. Most of the design choices for the service have been strongly influenced by Bluetooth features. The effectiveness of the indoor positioning service is critically analyzed. Experimental and simulation results used for defining the policy of mobile device discovery are shown.
One of the principal characteristics of large scale wireless sensor networks is their distributed, multi-hop nature. Due to this characteristic, applications such as query propagation rely regularly on network-wide fl...
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In this paper, we present a real-time communication protocol for sensor networks, called SPEED. The protocol provides three types of real-time communication services, namely, real-time unicast, real-time area-multicas...
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In this paper, we present a real-time communication protocol for sensor networks, called SPEED. The protocol provides three types of real-time communication services, namely, real-time unicast, real-time area-multicast and real-time area-anycast. SPEED is specifically tailored to be a stateless, localized algorithm 'with minimal control over-head. End-to-end soft real-time communication is achieved by maintaining a desired delivery speed across the sensor network through a novel combination of feedback control and non-deterministic geographic forwarding. SPEED is a highly efficient and scalable protocol for sensor networks where the resources of each node are scarce. Theoretical analysis, simulation experiments and a real implementation on Berkeley motes are provided to validate our claims.
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