Mobility

Fast Dual-Radio Cross-Layer Handoffs in Multi-Hop Infrastructure-Mode 802.11 Wireless Networks for In-Vehicle Multimedia Infotainment

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Executive Summary

Delivering multimedia infotainment applications such as VoIP, IPTV, or drive-by info-fueling to moving vehicles require seamless high-bandwidth connectivity between On-Board Units (OBUs) and Multimedia Services. 802.11 Infrastructure-mode Wireless LAN (WLAN) is a suitable candidate for delivering such services because of its increasingly ubiquitous deployments, availability of cheap commodity off-the-shelf hardware, high bandwidth potential, and strong security. Multi-hop WLANs are better suited for high-bandwidth applications compared to single-hop WLANs (in the latter, each Access Point AP must cover a larger area) since the former has enhanced overall capacity through better spatial frequency reuse and provides higher data-rates to Mobile Nodes (MNs) due to shorter average-distances to APs.

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