Study of Virtual Admission Control Scheme in Wireless LAN

Abstract

With the promotion of wireless technologies, more and more devices are built-in wireless capabilities. The traditional wireless technology confronted with some shortcomings in practical use, such as insufficiency for bandwidth, and lack of guaranteed the QoS (Quality of Services). In order to provide differential qualities for various kinds of services, several researches were proposed by scheduling traffic with priority or reservation at packet level. In this paper, we study the QoS issue at connection level and propose an algorithm, named VAC (Virtual Admission Control), to regulate the call request for the provisioning of QoS in wireless LAN by measuring the performance through virtual MAC and virtual source. VAC can admit some requested demands without deteriorating the wireless medium too much. And simulations are performed to analyze the performance of the proposed scheme.