IEEE 802.21: media independent handover: features, applicability, and realization

Authors:
Kenichi Taniuchi;Yoshihiro Ohba;Victor Fajardo;Subir Das;Miriam Tauil;Yuu-Heng Cheng;Ashutosh Dutta;Donald Baker;Maya Yajnik;David Famolari
Affiliations:
Toshiba Corporation;Toshiba America Research Inc.;Toshiba America Research Inc.;Telcordia Technologies Inc.;Telcordia Technologies Inc.;Telcordia Technologies Inc.;Telcordia Technologies Inc.;Telcordia Technologies Inc.;Telcordia Technologies Inc.;Telcordia Technologies Inc.
Venue:
IEEE Communications Magazine
Year:
2009

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Abstract

Providing users of multi-interface devices the ability to roam between different access networks is becoming a key requirement for service providers. The availability of multiple mobile broadband access technologies, together with the increasing use of real-time multimedia applications, is creating strong demand for handover solutions that can seamlessly and securely transition user sessions across different access technologies. A key challenge to meeting this growing demand is to ensure handover performance, measured in terms of latency and loss. In addition, handover solutions must allow service providers, application providers, and other entities to implement handover policies based on a variety of operational and business requirements. Therefore, standards are required that can facilitate seamless handover between such heterogeneous access networks and that can work with multiple mobility management mechanisms. The IEEE 802.21 standard addresses this problem space by providing a media-independent framework and associated services to enable seamless handover between heterogeneous access technologies. In this article, we discuss how the IEEE 802.21 standard framework and services are addressing the challenges of seamless mobility for multi-interface devices. In addition, we describe and discuss design considerations for a proof-of-concept IEEE 802.21 implementation and share practical insights into how this standard can optimize handover performance.