A lot has been said about wireless networking in recent years especially on the wireless LAN. More importantly, it has changed the way people think about wireless networks. Used to be seen as expensive technology for individuals, wireless LAN can now be seen not only in enterprise networks but also at public areas like the airport, hotels, coffee shops and also in shopping malls. This increasin...

One fundamental issue in high-speed wireless local area networks (LANs) is to develop efficient medium access control (MAC) protocols. In this paper, we focus on the performance improvement in both MAC layer and transport layer by using a novel medium access control protocol for high-speed wireless LANs deploying carrier sense multiple access/collision avoidance (CSMA/CA). We first present a re...

The G.722 wideband speech codec offers higher quality and better naturalness than G.711, is low in complexity, has low delay, and tandems well with other codecs. This makes it an attractive codec for Voice over IP and Voice over Wireless LANs. However, loss of a G.722 coded speech frame results in a mismatch of the encoder/decoder states that affects the decoding of subsequent correctly receive...

Recent work has focused on hiding explicit network identifiers such as hardware addresses from the link layer to enable anonymous communications in wireless LANs. These protocols encrypt entire wireless packets, thereby providing unlinkability. However, we find that these protocols neglect to hide identifying information that is preserved within the wireless physical layer. We propose a techniq...

The past decade has seen tremendous research, development and usage of local and wide area wireless networks. There is now a high penetration of cell-phone usage along with the evolution of powerful new mobile platforms, smaller wireless devices, and micro-browsers for small handhelds. Many important wireless data communication standards such as 802.11 for LANs and GPRS, 3G for WANs have also m...

Wireless LANs, or WiFi, are very common in any household or business today. Their wireless nature allows mobility and convenience for the user and that opens up a lot of new possibilities in mobile devices such as smartphones and tablets. One application that makes use of wireless LANs is positioning, which can be used in areas where Global Positioning Systems may have trouble functioning or no...

CSMA (carrier sense multiple access) is random access protocol for multi-user data communication; it was development to be used in wired (Ethernet) systems, and eventually adopted as the main access scheme of wireless LANs. Because of some intrinsic imperfections and unpredictability of wireless channel, pure CSMA system can not completely use the channel resources; the methods offered in the 8...

In this paper, we propose a reliable multicast method for wireless LAN environments using parity-based loss recovery and dynamic Time Division Duplex(TDD)based group ACK mechanism. This method uses erasure code to reduce the impact of independent packet loss for different receivers and group ACK scheme to reduce signaling trafic. This proposed method is suitable to transmit multicast data in TD...

Wireless Intrusion Detection System. 1*. Keith Chettiar, 2Akshay Patil, 3Arpita Pradhan and 4 Ms. Sushama Khanvilkar. 1*, 2, 3, 4 Computer Department, Xavier. Kismet is a network detector, packet sniffer, and intrusion detection system for 802.11 wireless LANs. Kismet will work with any wireless card which supports raw. NCSA Wiki these zones is monitored by a Network Intrusion Detection System ...

Wireless Information Delivery Environment (WIDE) is a distributed data dissemination system, which uses IEEE 802.11b technology. WIDE aims to deliver popular information services to registered mobile clients in WLAN hot spots. Data delivery is based on broadcasting and multicasting to provide scalability and efficient use of the wireless channel. Reliability is assured with a combination of For...