A Seamless Service Management with Context-Aware Handoff Scheme in Ubiquitous Computing Environment
Despite the importance of seamless connectivity in ubiquitous computing, research for seamless connectivity has not been considered properly. To provide seamless connectivity, this paper proposes an application execution model for seamless services with an intelligent context-aware handoff scheme based on context information, such as user intentions and application requirements as well as issues of network layer. In this paper, we define several profiles reflecting various context informations and design basic modules organizing middleware architecture for seamless service management and efficient vertical handoff (VHO) management. Consequently, the proposed seamless service management with context-aware handoff scheme provides service continuity in ubiquitous computing environment by preventing unnecessary handoffs, changing application service modes adaptively, and eventually maintaining optimal network configuration. And also simulation results show about 38% enhanced performance in the processing rate, about 13% enhanced performance from service continuity, and about 29% enhanced performance in the processing time, compared with conventional schemes.
KeywordsUbiquitous Computing Packet Error Rate Service Mode Application Agent Ubiquitous Computing Environment
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- 3.Sousa, J., Garlan, D.: Aura: an architectural framework for user mobility in ubiquitous computing environments. In: Proceedings of the 3rd Working IEEE/IFIP Conference on Software Architecture, pp. 29–43 (August 2002)Google Scholar
- 8.Chen, W.T., Shu, Y.Y.: Active Application Oriented Vertical Handoff in next-Generation Wireless Networks. In: IEEE Wireless and Communications and Networking Conference 2005, vol. 3(13-17), pp. 1383–1388 (March 2005)Google Scholar
- 10.Telecommunications Technology Association (TTA), http://www.tta.or.kr/
- 11.GSM World, GPRS-Standard class 10, http://www.gsmworld.com/
- 12.Media Independent Handover (MIH) Working Group, http://www.ieee802.org/21/