Tossim Accurate And Scalable Simulation Of Entire Tiny Os Applications Sensys03
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TOSSIM is a scalable and accurate simulator for TinyOS applications that: 1) Simulates entire TinyOS applications at the component level, replacing hardware with software to model interrupts as events. 2) Compiles applications directly from TinyOS source code to run on either the simulator or hardware with no changes required. 3) Is scalable to thousands of nodes through static memory modeling and handles fine-grained system behavior and interactions through bit-level simulation.
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Wireless sensor networks are composed of nodes that communicate wirelessly and self-organize after deployment. Each node contains processing capability, memory, an RF transceiver and antenna, a power source, and sensors. Systems can include thousands or tens of thousands of nodes communicating to monitor environments. It is expected that within 10-15 years, wireless sensor networks will cover the world and connect to the Internet, making the Internet a physical network. Research in this area includes workshops and conferences each year focused on algorithms and protocols to maximize network lifetime while ensuring robustness, fault tolerance, and self-configuration.
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The document discusses the evolution of wireless mesh networking technologies. It describes how early ad hoc networks led to developments in wireless sensor networks and wireless mesh networks (WMNs). WMNs provide wireless infrastructure by replacing wired networks with self-configuring, flexible wireless links. This allows for easier deployment in areas where wired infrastructure is not feasible or too expensive. The document outlines ongoing research into heterogeneous mesh networking using multiple wireless technologies to create high-capacity access networks for future applications.
Modules1
The document discusses computer and network security threats at both the individual and corporate level. At the individual level, basic threats include theft of passwords, email-based threats, and launching of malicious programs. Password threats can impact home security, document safety, and operating system login protection. At the corporate level, threats include web defacement, website forgery, corporate espionage, launching malicious code on websites, exchange of criminal ideas and tools. The document emphasizes the importance of security across multiple domains.
Tems discovery device_10.0_datasheet-3
TEMS Discovery is a wireless network reporting and analysis tool that consists of three products - TEMS Discovery Device, TEMS Discovery Network, and TEMS Discovery Enterprise. It allows automatic processing of drive test data from multiple sources to generate customized reports. These reports provide insights for troubleshooting network issues, benchmarking performance, and proving quality of new networks and services. The tools support various data types and network technologies and can organize, store, visualize and share data across an organization for collaboration.
Opportunistic mane ts mobility can make up for low transmission power
This document discusses opportunistic mobile ad hoc networks (MANETs) where nodes communicate by exploiting contact opportunities as they move randomly. It presents an analysis of flooding time, which is the number of time steps required for a message to spread from a source node to all other nodes. The analysis derives an upper bound on flooding time that decreases with node speed, showing that higher mobility can enable faster information spreading even when the network is sparse and disconnected. This bound is nearly tight and holds with high probability. Thus mobility is considered a resource rather than a hurdle for data forwarding in opportunistic MANETs.
WIRELESS SENSOR NETWORK
Wireless sensor networks combine sensing, computation and communication capabilities into small sensor nodes. A wireless sensor network consists of multiple sensor nodes that communicate wirelessly to perform distributed sensing tasks. Each sensor node contains components for power, computation, sensing and communication. Security is important for wireless sensor networks due to their widespread applications and vulnerabilities like traffic analysis attacks and Sybil attacks. Common security techniques for wireless sensor networks include encryption, cryptography and access control protocols.
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