USING WI-FI TO ADD VOICE SERVICES WITH QOS AND SECURITY TO FIXED BROADBAND WIRELESS NETWORKS

摘要

Voice over Wi-Fi is widely acknowledged as one of the important, emerging applications for wireless LAN networks and a key enabler for the convergence of Cellular and Voice over IP. Organizations and Operators should be able to offer a seamless mobile wireless voice service over various fixed broadband infrastructure (wireless and wired) while maintaining the security and Quality of Service (QoS) required by each application or service. This paper introduces the notion of a Mobility Controller residing outside of the fast data path and Virtual Access Point Technology to provide the ability to enforce the different security & QoS policies required by multiple services such as voice and data. While the selection of the backhaul network or corporate Intranet may vary based on the available infrastructure and various technological choices, the use of multi-mode (Wi-Fi and cellular) devices at the edges of such networks bears the promise of a unified service delivery infrastructure today and for the future.