with PCF. Using fragmentation in DCF did not affect the load much and it remains nearly the same. However‚ using PCF resulted in load drop and when we used fragmentation with PCF the load decreased even more. As expected‚ the throughput of WLAN uses PCF was higher than WLAN with only DCF enabled because collisions decrease by using free contention free period. However‚ although the load was lower in DCF_PCF_Frag than this on DCF_PCF but the throughput was higher because of retransmission of fragments
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References: CWNA Guide to Wireless LANs‚ 2e‚ Ciampa - © 2006 Thomson Course Technology Retrieved March 7‚ 2011 www.peppm.org/Products/cisco/price Retrieved March 7‚ 2011
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ENHANCEMENT OF QOS OF VOIP IN HETEROGENEOUS NETWORKS B.Balavenkatesh Abstract— The increasing demand for broadband services is causing the cellular network providers to consider for the integration of Wireless LAN with GPRS. WLAN is having higher data rate but low coverage area but GPRS is having lower data rate but with high coverage area. So integrating these two heterogeneous networks will lead to utilization of advantages of both and can increase the system throughput. The handoff latency
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Wi-Fi Security with Wi-Fi Protection Plus Ajin Abraham‚ Joseph Sebastian Vimal Jyothi Engineering College. After conducting a study and analysis of the vulnerabilities of current Wi Fi Security industrial standards‚ we consider the possibility a new security architecture for Wi Fi which we call Wi Fi P+. Wi-Fi P+ is not a complex security architecture. It act as an additional security layer implemented over WPA/WPA2. It also implements some already available features that are not
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wireless OFDM systems. Keywords— HIPERLAN‚ IEEE802.11‚ OFDM‚ channel estimation‚ channel tracking‚ noise reduction I. I NTRODUCTION The American IEEE802.11a standard and the European equivalent HIPERLAN/2 are two similar concepts for broadband wireless LANs (WLAN) in the 5 GHz band. Both standards are based on the multicarrier modulation technique OFDM (orthogonal frequency division multiplexing) combined with convolutional channel coding. The baseband modulation schemes of both standards are very similar
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Analysis “Should Laws Against Drug Use Remain Restrictive?” In this article‚ executive vice president of the Center on Addiction and Substance Abuse Herbert Kleber‚ along with the founder of this organization Joseph Califano Jr. states their opinions supporting the restrictive laws against drug use. On the other end of the spectrum‚ author Peter Gorman provides his ideas as to why these drug laws have been ineffective and actually increase the amount of drug abuse in our society. Kleber and
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using android smartphone with Wi-Fi technology because the they wanted to minimize the time cause by manual operation and also for the security purposes. Though people are still using manual operation in switching a device‚ it is much better if they use a unique type of controller. The researcher proposed something that can help for the home owners. 2 Having this handy smartphone‚ anyone can switch on and off the electronic devices such as TV‚ lights‚ fans
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Wi-Fi also allows connectivity in peer-to-peer (wireless ad-hoc network) mode‚ which enables devices to connect directly with each other [1]. This connectivity mode is useful in consumer electronics and gaming applications [1]. Wi-Fi products can use different radio frequencies [2]: • The 802.11a standard
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Introduction Wireless network is indicated to a telecommunication network whose interconnections between nodes are implemented without the use of wires‚ such a computer network. Nowadays‚ wireless network has become the important thing in telecommunication. This sort of technology has been used for over a century and remains synonymous with radio. In 19th century‚ Guglielmo Marconi invented a radio and made his made his mark in the world of wireless technology. At that moment‚ Marconi was about
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In this scholarly article‚ Kwok Pui Lan‚ a professor at the Chinese University of Hong Kong‚ explains how culture outside of the Bible view its beliefs. Being from China‚ she describes the thoughts of Asian views of the Bible. Kwok Pui Lan talks about how Asians believe the Bible is a part of “western domination and cultural imperialism‚”(25). They feel as though if God has this great power‚ then why doesn’t He help the suffering of the world? She explains that “many Chinese Christians reject
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