Mobility

IEEE 802.21: Media-Independent Handover Services

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Executive Summary

Popular mobile devices now ship with several integrated wired and wireless network interfaces. Personal Digital Assistants (PDAs) and smartphones, for example, are increasingly supporting communications through both cellular technologies and Wireless LANs (WLANs); laptops typically come with built-in Ethernet, Wi-Fi, and Bluetooth. As multiaccess devices proliferate, the authors move closer to a network environment that is often referred to as "Beyond 3G" (B3G). Key success factors for cellular Third-Generation (3G) communications include better cell capacities, increased data rates, transparent mobility within large geographical areas, and global reachability.

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