Densely distributed wireless real-time system must perform communication scheduling and protocols in addition to task scheduling to achieve schedulability and reliable communication. While many wireless sensor network...
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ISBN:
(纸本)9780769533490
Densely distributed wireless real-time system must perform communication scheduling and protocols in addition to task scheduling to achieve schedulability and reliable communication. While many wireless sensor networks are densely distributed, they assume low duty cycling and trivial data packet rates, and the), cannot handle many real-world applications. To highlight these design issues, this paper presents a case study with EcoDAQ, a wireless data acquisition system with 50 sensor nodes streaming real-time data over the same frequency channel. To achieve reliable communication, we define a pulling protocol that minimizes node complexity while guaranteeing collision freedom on a given frequency channel. Our case study illustrates the impact of communication requirements on the rest of the systems including bus and processing speeds. Experimental results show that our monitoring station can sustain gathering accelerometer data from up to 50 nodes in one square meter area at up to 15,000 samples per second with minimal latency and show very high expandability, flexibility and reliability.
Recently RFID (Radio Frequency Identification) middleware technology attracts great attention due to its competitive business value. Being able to be automatically identified and collect information, RFID systems have...
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there is no mobile phone devices or wire net line equipments for real-time control in some industrial fields such as metallurgy, mine, transferring port. therefore, the Wireless Local Area Network (WLAN) monitoring pl...
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ISBN:
(纸本)9781424421077
there is no mobile phone devices or wire net line equipments for real-time control in some industrial fields such as metallurgy, mine, transferring port. therefore, the Wireless Local Area Network (WLAN) monitoring platform system is investigated for these industrial fields in the paper. Using Radio Frequency (RF) wireless distributed network and the embedded technology, the monitoring platform's module structure has been established. the hardware and software of monitoring system have been analyzed. the configure mode of the wireless monitoring devices has also been given. Using the given control modules, RF wireless transmitting, data acquiring and processing of signals, as well as equipment states diagnosing can be implemented. the research shows that the system platform can solve the communication and monitoring problems in such no cable net line equipments and no mobile phone field-working environments and that the control system given has the characteristic of reliability and flexibility. More ever this system is economic, and is auspicious for further applications.
the objective of this paper is to describe a new distributed Intrusion Detection System (IDS) based on CVSS framework. this new platform uses a wide set of classical IDS and detection entities. this distributed IDS ai...
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Wireless sensor network (WSN) consists of tiny nodes with sensing, actuating, computation, wireless communications capabilities. Because of node's limited energy, many routing, topology control, media access contr...
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Wireless sensor networks(WSN) based on hexagonal mesh can be able to extend the lifetime of self-configuring systems by exploiting redundancy to conserve energy while maintaining application fidelity. However, securit...
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Most routing protocols in wireless sensor networks take networks lifetime as design target, but not security. this paper researches on routing security and proposes SS-LEACH algorithm based on LEACH algorithm. the SS-...
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the proceedings contain 101 papers. the topics discussed include: role based access control in distributed object systems;security framework in a virtual large-scale disk system;pose estimation for evaluating standing...
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ISBN:
(纸本)9780769531731
the proceedings contain 101 papers. the topics discussed include: role based access control in distributed object systems;security framework in a virtual large-scale disk system;pose estimation for evaluating standing long jumps via dynamic Bayesian networks;delivery infrastructure for secure scalable coded multimedia;adaptive layered multimedia transmissions over wireless networks;bipartite graph based dynamic spectrum allocation for wireless mesh networks;real-time routing in wireless sensor networks;fast link assessment in wireless mesh networks by using non-constant weight code;flip error resistant stitching in sensor network localizations;on improving the precision of localization with gross error removal;game theoretic packet scheduling to combat non-cooperativeness in wireless mesh networks;a middleware services simulation platform for wireless sensor networks;data collection with multiple mobile actors in underwater sensor networks.
A comprehensive WSNs (Wireless sensor Networks) design methodology should deserve enough effort to select a suitable set of sensors with a proper spatial distribution, in order to ensure a correct monitoring of the pa...
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A mobile WiMAX system based on ieee 802.16e wireless metropolitan area networks targets to support mobile broadband wireless access (BWA). In this article we propose a cell architecture based on distributed antennas (...
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