دانلود مقاله All-to-all data dissemination with network coding in dynamic MANETs - انتشار 2014

Contents lists available at ScienceDirectComputer Networks Péter Vingelmann a,b, Janus Heide b, Morten Videbæk Pedersen b, Qi Zhang c,Frank H.P. Fitzek b a b s t r a c tThis paper investigates the problem of efficient data dissemination in Mobile Ad hoc NETwork(MANETs). A testbed is presented; which provides a realistic degree of mobility inexperiments. The testbed consists of ten autonomous robots with mobile phones mountedon them. The mobile phones form an IEEE 802.11g ad hoc netw ...

دانلود مقاله Performance Evaluation of Network Coding in IEEE 802.11 Wireless Ad Hoc Networks - انتشار 2014

Ad Hoc Networks Volume 16, May 2014, Pages 131–141   Kyu-Hwan Lee, Sunghyun Cho, Jae-Hyun Kim AbstractWe evaluate the practical network coding (NC) gain in a wireless ad hoc networks.First, we introduce how network coding can be applied to IEEE 802.11ad hoc networks. Next, we find obstructive factors by which the NC gainmay decrease as compared with the theoretical NC gain. Finally, throughthe performance evaluation, we analyze why a performance difference occursbetween practical and ...

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 Forward Error Correction in Sensor Networks

Jaein Jeong and Cheng Tien EeDepartment of Electrical Engineering and Computer ScienceUniversity of California, BerkeleyMay 16, 2003 AbstractIn any network, there are two basic methods to recover errorneous packets. One way is to useAutomatic Repeat Request (ARQ), and another is Forward Error Correction (FEC). Since, in sen-sor networks, power is scarce and is primarily consumed by wireless transmission and reception,we would prefer to use FEC rather than ARQ. In this paper we determine empirica ...

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 Multiple Receiver Strategies for Minimizing Packet Loss in Dense Sensor Networks

Bernhard Firner, Chenren Xu, Richard Howard, and Yanyong Zhang ABSTRACTA typical wireless sensor network consists of many small sensorsthat collect instrument data around their locations andforward it to a central location for data processing. Thesenetworks can be deployed to monitor livestock and agriculturalassets, products in a store, patients in a hospital, andso on. In many cases sensors have to be densely deployed,and collisions or overhead due to collision avoidance willconsiderably degra ...

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 ...

Art and Architecture in the Islamic Tradition (مجموعه شماره 1 کتب حکمت اسلامی)

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Architecture for the Poor, An Experiment in Rural Egypt

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