Following the widespread use of the Internet, especially the World Wide Web since 1995, wireless networking has become a buzz word at the beginning of the new millennium. New terms such as wireless communications, wireless local area networks (WLANs), wireless web, wireless application protocols

Abstract not found

Abstract not found

et codirigée par Franck ROUSSEAU

Abstract- IEEE 802.11 is the most worldwide established and deployed protocol for Wireless Local Area Networks (WLANs). In this paper, we extend previous work by studying the proposed DIDD (Double Increment Double Decrement) contention window-resetting scheme, which is utilized to enhance IEEE 802

Unlike wired networks that can provide large bandwidth, the bandwidth of wireless local area networks (WLANs) is rather limited because they rely on an inexpensive, but error prone, physical medium (air). Hence, it is important to improve their loss performance.

When planning a wireless local area network, there are de-sign issues that need to be considered. In this paper, the fundamentals of planning a wireless local area network are introduced and discussed to highlight the requirements in-volved. Network constraints, as encountered in the physical

When the wireless communications is coming to the offices and the homes, there are some new security issues to be taken care of. Today we have continuously growing markets for the wireless LANs, but there is big black hole in the security of this kind of networks. This paper gives an overview

consuming any extra bandwidth in the wireless medium. Our experimental results show that Divert can reduce frame loss rates in realistic scenarios by as much as 26 % compared to a fixed-path scheme that uses the best available transmitter.

ABSTRACT — This paper investigates the impact of security on the performance of WLAN. More specifically, it analyzes the impact of different implementations of encryption techniques used by two security protocols, namely Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA) on the throughput over WLAN IEEE 802.11g. This paper also addresses the different issues related to the security protocols currently used in WLAN IEEE 802.11g and demonstrates how these issues affect the final results of the experiments conducted. The results show that within the same access point range the security adds moderate degradation on the throughput that may affect some applications over both infrastructure and ad hoc WLANs.