دانلود مقاله PPR: Partial Packet Recovery for Wireless Networks

PPR: Partial Packet Recovery for Wireless NetworksKyle Jamieson and Hari BalakrishnanMIT Computer Science and Artificial Intelligence Lab{jamieson, hari}@csail.mit.edu   AbstractBit errors occur over wireless channels when the signal isn’t strong enough toovercome the effects of interference and noise. Current wireless protocols may useforward error correction (FEC) to correct for some (small) number of bit errors,but generally retransmit the whole packet if the FEC is insufficie ...

دانلود مقاله Wireless Sensor Network Applications: A Study in Environment Monitoring System

Wireless Sensor Network Applications: A Study in Environment International S ymposium on R obotics and Intelligent S ensors 2012 (IR IS 2012)Monitoring SystemMohd Fauzi Othmana, Khairunnisa Shazalib*   AbstractDevelopment in the technology of sensor such as Micro Electro Mechanical Systems (MEMS), wireless communications, embeddedsystems, distributed processing and wireless sensor applications have contributed a large transformation in Wireless Sensor Network(WSN) recently. It assists and i ...

دانلود مقاله A Wireless Sensor Network Air Pollution Monitoring System

A Wireless Sensor Network Air Pollution Monitoring System Department of Computer Science and Engineering, University of Mauritius, Reduit,[e-mail][e-mail][e-mail] ABSTRACTSensor networks are currently an active research area mainly due to the potential of their applications. Inthis paper we investigate the use of Wireless Sensor Networks (WSN) for air pollution monitoring inMauritius. With the fast growing industrial activities on the island, the problem o ...

دانلود مقاله Secure and Efficient Intermediate Node Authentication in Wireless Sensor Networks

International Journal of Signal Processing Systems Vol. 3, No. 1, June 2015 R. C. Choukimath and V. V. Ayyannavar Abstract—Message authentication is one of the most effective ways to thwart unauthorized and corrupted messages from being forwarded in wireless sensor networks (WSNs). For this reason, many message authentication schemes have been developed, based on either symmetric-key cryptosystems or public-key cryptosystems. Most of them, however, have the limitations of high computationa ...

دانلود مقاله Cross-Layer Analysis of Error Control in Wireless Sensor Networks

Mehmet C. Vuran Ian F. Akyildiz Abstract—Severe energy constraints and hence the low powercommunication requirements amplify the significance of theenergy efficient and preferably cross-layer error control mechanismsin Wireless Sensor Networks (WSN). In this paper, a crosslayermethodology for the analysis of error control schemes inWSNs is presented such that the effects of multi-hop routing andthe broadcast nature of the wireless channel are investigated.More specifically, the cross-layer ...

دانلود مقاله Datalink Streaming in Wireless Sensor Networks

Raghu K. Ganti, Praveen Jayachandran ∗,Haiyun Luo, and Tarek F. Abdelzaher   AbstractDatalink layer framing in wireless sensor networks usuallyfaces a trade-off between large frame sizes for highchannel bandwidth utilization and small frame sizes for effectiveerror recovery. Given the high error rates of intermotecommunications, TinyOS opts in favor of small framesizes at the cost of extremely low channel bandwidth utilization.In this paper, we describe Seda: a streaming datalinklaye ...

دانلود مقاله Error Correction Codes in Wireless Sensor Network: An Energy Aware approach انتشار 2010

World Academy of Science, Engineering and TechnologyVol:4 2010-01-26 Mohammad Rakibul Islam   Abstract—Link reliability and transmitted power are two importantdesign constraints in wireless network design. Error control coding(ECC) is a classic approach used to increase link reliability andto lower the required transmitted power. It provides coding gain,resulting in transmitter energy savings at the cost of added decoderpower consumption. But the choice of ECC is very critical in thec ...

دانلود مقاله AN ANALYSIS OF VARIOUS PARAMETERS IN WIRELESS SENSOR NETWORKS USING ADAPTIVE FEC TECHNIQUE

M.R.Ebenezar jebarani1and T.Jayanthy2   ABSTRACTIn Wireless sensor network, since the media is wireless there will be burst errors which leads tohigh bit error rate that affect the throughput. Wireless sensor networks drop the packets due to propagationerrors that lead to retransmission traffic. This paper evaluates the effect of adaptive FEC in Wirelesssensor networks. Adaptive FEC technique improves the throughput by dynamically tuning FEC dependingupon the wireless channel loss. The main ...

دانلود مقاله A multipath routing protocol for wireless sensor network for mine security monitoring - انتشار 2010

Mining Science and Technology (China) Volume 20, Issue 1, January 2010, Pages 148–151   XIAO Shuo1,2,*, WEI Xueye2, WANG Yu2   Abstract: Underground mining is a hazardous industrial activity. In order to provide a safe working environment for miners, aWireless Sensor Network (WSN) technology has been used for security monitoring. It can provide a wide range of surveillancewith a relatively low cost. In this study, an Energy-Based Multipath Routing (EBMR) protocol is proposed, wh ...

تحقیق جامع در مورد شبکه های wireless به صورت (word )

امروزه از شبکه های بدون کابل (wireless) در ابعاد متفاوت و با اهداف  مختلف استفاده میشود و ................. ...