The type of the applications for which Internet is being used has changed over the years. Multimedia applications, Real-time applications and Game playing require Quality of service. IEEE has proposed IEEE 802.11e, a quality of service extension to the wireless LAN standard IEEE 802.11. In this paper service differentiation ability of 802.11e is evaluated. Identical traffic is considered for al...

Wireless networks are very common, both for organizations and individuals. Many laptop computers have wireless cards pre-installed for the buyer. The ability to enter a network while mobile has great benefits. However, wireless networking has many security issues. Crackers have found wireless networks relatively easy to break into, and even use wireless technology to crack into non-wireless net...

Wireless LANs are everywhere these days from home to large enterprise corporate networks due to the ease of installation, employee convenience, avoiding wiring cost and constant mobility support. However, the greater availability of wireless LANs means increased danger from attacks and increased challenges to an organization, IT staff and IT security professionals. This paper discusses the vari...

In recent years, a variety of mobile computers equipped with wireless communication devices have become popular. These computers use applications and protocols , originally developed for wired desktop hosts, to communicate over wireless channels. Unlike wired networks, packets transmitted on wireless channels are often subject to burst errors which cause back to back packet losses. In this pape...

In this paper, we present an indoor surveillance system implemented using the commercially available wireless LAN infrastructure. Taking advantage of the programmability of the wireless network nodes, we have built a wireless network that has two modes of operation: the communication mode, when the network is used as a traditional wireless LAN, and the surveillance mode, when the network is use...

The IEEE 802.11 wireless LAN standard specifies which messages shall be exchanged between an access point and a station to support mobility. However, the implementation of mobility in the wired part of the network, i.e. the distribution system or inter-access point protocol, is not specified. This paper presents and evaluates different options for the implementation of the distribution system u...

Q: What is a Wireless LAN (WLAN)? Q: What are the benefits of using a WLAN instead of a wired network connection? Q: Are Intel WLAN products interoperable with other product brands? Q: What is Wi-Fi*? Q: What is IEEE 802.11b, 802.11g, and 802.11a? Q: What is the transmission range of WLAN products? Q: What data rates are available with a WLAN network connection? Q: What is an Access Point? Q: W...

Digital Enhanced Cordless Telecommunications(DECT) can carry both voice and data. The DECTLAN project at Centre for Wireless Communications (CWC) aims to develop a wireless LAN system based on the DECT standard. In phase I, the DECTLAN system supports a single duplex DECT bearer and an effective data rate of 24 kbps with no mobility support. In phase II of the project, the system will support 6...

Particular WLAN pathologies experienced in realistic scenarios are hard to detect, due to the complex nature of the wireless medium. Prior work has employed sophisticated equipment, driver modifications, or even application-layer techniques, towards diagnosing such pathologies. The key novelty of our approach lies in the identification of metrics able to characterize the root causes of individu...

In this case study we consider model-checking of some properties for IEEE 802.11 Wireless LAN [1]. Since stations in wireless LANs are not able to listen to their own transmission they cannot employ Carrier Sense Multiple Access with Collision Detection (CSMA/CD) as already investigated in one of our other case studies. Hence, other techniques need to be used to handle collisions. The IEEE 802....