Reducing MAC layer handoff latency in IEEE 802.11 wireless LANs

With the growth of IEEE 802.11-based wireless LANs, VoIP and similar applications are now commonly used over wireless networks. Mobile station performs a handoff whenever it moves out of the range of one access point (AP) and tries to connect to a different one. This takes a few hundred milliseconds, causing interruptions in VoIP sessions. We developed a new handoff procedure which reduces the MAC layer handoff latency, in most cases, to a level where VoIP communication becomes seamless. This new handoff procedure reduces the discovery phase using a selective scanning algorithm and a caching mechanism. Categories and Subject Descriptors C.2.1 [Computer System Organization]: Computer- Communication Networks General Terms Measurement, Performance, Experimentation Keywords IEEE 802.11, Fast Handoff, Selective scanning

• Type: Conference
• Year: 2004
• Where: MOBICOM
• Authors: Sangho Shin, Andrea G. Forte, Anshuman Singh Rawat, Henning Schulzrinne
• Keywords: 802.11-based Wireless Lans, MOBICOM 2004, Selective Scanning, VoIP