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An Overview Of Context-Aware Vertical Handover Schemes In Heterogeneous Networks

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Author(s): Hanan Alhazmi | Nadine Akkari

Journal: International Journal of Computer Science and Engineering Survey
ISSN 0976-3252

Volume: 2;
Issue: 4;
Start page: 33;
Date: 2011;
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Keywords: Seamless Service Continuity | Context Awareness | Next Generation Wireless Networks | Vertical Handover (VHO) | WLAN/WiMAX interworking

ABSTRACT
As wireless access technologies grow rapidly, the recent studies have focused on granting mobile usersthe ability of roaming across different wireless networks in a seamless manner thus offering seamlessmobility. The different characteristics of each wireless technology with regards to QoS brought manychallenges for provisioning the continuous services (audio/video streaming) in a seamless way. In thispaper, we intend to review the existing context-aware methods which offered solutions for servicecontinuity. We looked at the types of context information used in each solution. Through this study, it isclear that context awareness plays a significant role in handover process in order to satisfy usersdemanding seamless services. Therefore, the goal of this paper is to compare the existing methodsgrouped as general, IMS based, and WLAN/WiMAX solutions in terms of several criteria, such asinterworking architecture, service continuity, and QoS provisioning.

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