Using Link Layer Information for Improving Vertical Handovers

Konferenz: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
11.09.2005 - 14.09.2005 in Berlin, Germany

Tagungsband: PIMRC 2005

Seiten: 6Sprache: EnglischTyp: PDF

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Puttonen, Jani; Fekete, Gabor; Mäkelä, Jukka; Hämäläinen, Timo (University of Jyväskylä, Department of Mathematical Information Technology, PO Box 35, 40014 University of Jyväskylä, Finland)
Narikka, Jorma (Jyväskylä Polytechnic, School of Information Technology, Piippukatu 2, 40100 Jyväskylä, Finland)

In this paper we present a common triggering mechanism (cross-layer framework) and logic to gather link state and quality related information from the link layers of different access technologies. This information may be utilized by upper layer protocols and applications to react to changes of the link layer. Examples of such a utilization is movement detection, handover decision and application adaptation. The access technology dependent events and parameters, when necessary, are converted into access technology independent triggers and hints. The presented prototype architecture, Link Information Provider (LIP), is currently tested with the VERHO vertical handover controller, which enables intelligent policy-based handover decisions according to several input parameters from the user, application, link layer, etc. Currently, LIP supports certain general link layer parameters, which can be gathered from the operating system and network interface drivers. The system is designed to be easily extended.