A campus-wide wireless LAN has been implemented that combines the scalability of virtual LANs and the flexibility of switched Ethernet with the mobility of wireless LAN access. A suite of general-purpose software tools has been developed and deployed to monitor the status of the network, measure the bandwidth utilization, control access to the network, and authenticate users.

The focus of this paper is to describe and evaluate the security hazards and risks involved with wireless LANs within a business environment, present performance issues that must be addressed and introduce a new protocol, Intelligent Wireless Management (IWM) to enhance network performance. Performance evaluation is based on the results of experiments conducted using the network simulator (ns).

Providing service differentiation in wireless networks has attracted much attention in recent research. Existing studies so far have focused on the design of differentiated media access algorithms. Some quality of service (QoS) metrics, such as queueing delay cannot be completely addressed by these approaches. Moreover, without a formalized service differentiation goal that quantifies the outco...

Wireless LANs are becoming increasingly popular. While the technology offers wireless connectivity, it offers minimal or no quality of service (QoS) to multimedia applications. We propose a virtual QoS MAC layer (VQML) between MAC and networking layers to provide QoS. The proposed VQML architecture is implemented in a Linux platform and tested in an experimental wireless network test-bed in the...

Wireless LANs have revolutionized the way in whic h people communicate and share information. The market for wireless applications and hardware is growing at a phenomenal rate. With wireless networks proliferating rapidly, security of these networks becomes a major concern. Networks using the IEEE 802.11b standard have been proven inherently insecure. Hence, there exists the need for a fool -pr...

There is considerable interest in using wireless and mobile technologies in patient monitoring in diverse environments including hospitals and nursing homes. However, there has not been much work in determining the requirements of patient monitoring and satisfying these requirements using infrastructure-oriented wireless networks. In this paper, we derive several requirements of patient monitor...

In IEEE 802.11 wireless LANs, the DCF access method and the PCF access method operate alternatively within a superframe to service the time-varying traffic demands. Due to different medium access mechanisms deployed by DCF and PCF, they work well for some particular types of traffic scenarios respectively, while their performance may degrade under some other types of traffic demands. None of th...

A growing number of IEEE 802.11-based wireless LANs have been set up in many public places in the recent years. These wireless LANs provide convenient network connectivity to users. Although mobile nodes allowed roaming across wireless LANs, handoff latency becomes an obstacle when mobile nodes migrate between different IP networks. Advanced, the link-layer handoff process disrupts the associat...