An Adaptive Multimedia-Oriented Handoff Scheme for IEEE 802.11 WLANs

FAMH: Fast Inter-Subnet Multicast Handoff Method for IEEE 802.11 WLANs

When a mobile node that subscribes to one or more multicast groups moves to another subnet, it is essential to provide a network level multicast handoff mechanism. Previous multicast handoff schemes are based on Mobile IP. However it is known that the Mobile IP is not adequate to interactive multimedia applications such as voice over IP or video conferencing due to its large handoff delay. Addi...

A Multimedia and VoIP-Oriented Cell Search Technique for the IEEE 802.11 WLANS

FastScan: a handoff scheme for voice over IEEE 802.11 WLANs

IEEE 802.11 Wireless LANs are increasingly being used in enterprise environments for broadband access. Such large scale IEEE 802.11 WLAN deployments implies the need for client mobility support; a mobile station has to be “handed off” from one Access Point to another. Seamless handoff is possible for data traffic, which is not affected much by the handoff delay. However, voice traffic has strin...

A Virtual Access Point Based Fast Handoff Scheme of IEEE 802.11

–In the fast growing wireless technologies, IEEE 802.11 handoff is a big issue in communication. The seamless handoff problem in WLANs is a very important design issue to support the new astounding and amazing applications in WLANs, particularly for a user in a mobile vehicle. The entire delay time of a handoff is divided into probe, authentication, and reassociation delay times. Because the pr...

A Hybrid Connection Admission Control Scheme for QoS Enhancement in UMTS/WLAN Overlay Networks

In this paper we evaluate the performance of an hybrid and adaptive call admission control protocol for UMTS cellular networks with underlying tunnel-WLANs. either at the cell periphery or elsewhere within the UMTS coverage area. This CAC policy is proposed to limit the occurrence of hard IEEE 802.11 WLAN-UMTS handovers to mobiles using real time applications. It is based on the service class d...