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User-Centric Content Negotiation for Effective Adaptation Service in Mobile Computing
December 2003 (vol. 29 no. 12)
pp. 1100-1111
Francis C.M. Lau, IEEE Computer Society

Abstract—We address the challenges of building a good content adaptation service for mobile devices and propose a decision engine that is user-centric with QoS awareness, which can automatically negotiate for the appropriate adaptation decision to use in the synthesis of an optimal adapted version. The QoS-sensitive approach complements the lossy nature of the transcoding operations. The decision engine will look for the best trade off among various parameters in order to reduce the loss of quality in various domains. Quantitative methods are suggested to measure the QoS of the content versions in various quality domains. Based on the particular user perception and other contextual information on the client capability, the network connection, and the requested content, the proposed negotiation algorithm will determine a content version with a good aggregate score. We have built a prototype document adaptation system for PDF documents to demonstrate the viability of our approach.

[1],http:/, 2003.
[2] T.W. Bickmore and B.N. Schilit, Digestor: Device-Independent Access to the World Wide Web Proc. Sixth World Wide Web Conf. (WWW6), pp. 655-663, Apr. 1997.
[3] Qualitative Reasoning about Physical Systems. D.G. Bobrow, ed., MIT Press, 1985.
[4] J. Chen, Y. Yang, and H. Zhang, An Adaptive Web Content Delivery System Proc. Int'l Conf. Adaptive Hypermedia and Adaptive Web-Based Systems (AH2000), Aug. 2000.
[5] R. Comerford,"Handhelds Duke It Out for the Internet," IEEE Spectrum, vol. 37, no. 8, Aug. 2000, pp. 35-41.
[6] Device Independence Principle, W3C working draft, Sept. 2001, /.
[7] A. Fox and E.A. Brewer, Reducing WWW Latency and Bandwidth Requirements by Real-Time Distillation Proc. Fifth Int'l World Wide Web Conf. (WWW5), May 1996.
[8] R. Han, V. Perret, and M. Naghshineh, WebSplitter: A Unified XML Framework for Multi-Device Collaborative Web Browsing Computer Supported Cooperative Work 2000 (CSCW 2000), pp. 221-230, 2000.
[9] ITU-T Recommendation I. 350: General Aspects of Quality of Service and Network Performance in Digital Networks, Including ISDNs ITU Telecomm. Standardization Sector (ITU-T), Mar. 1993.
[10] C.-S. Li, R. Mohan,, and J.R. Smith,"Multimedia Content Description in the InfoPyramid," Proc. IEEE Int'l Conf. Acoustics Speech and Signal Processing (ICASSP 98), IEEE Press, Piscataway, N.J., 1998.
[11] W.Y. Lum and F.C.M. Lau, A Context-Aware Decision Engine for Content Adaptation IEEE Pervasive Computing, vol. 1, no. 3, pp. 41-49, July-Sept. 2002.
[12] W.Y. Lum and F.C.M. Lau, On Balancing Between Transcoding Overhead and Spatial Consumption in Content Adaptation Proc. Mobicom 2002 Conf., pp. 239-250, Sept. 2002.
[13] W.Y. Lum, Effective Content Adaptation Strategies for Mobile Computing master's thesis, Dept. Computer Science and Information Systems, The Univ. of Hong Kong, HKSAR, 2002, .
[14] W.Y. Ma, et. al., A Framework for Adaptive Content Delivery in Heterogeneous Network Environments Proc. Conf. Multimedia Computing and Networking, pp. 86-100, Jan. 2000.
[15] J.C. Mogul, Server-Directed Transcoding Computer Comm., vol. 24, no. 2, pp. 155-162, Feb. 2001.
[16] R. Mohan, J.R. Smith,, and C.-S. Li,"Adapting Multimedia Internet Content for Universal Access," IEEE Trans. Multimedia, vol. 1, no. 1, Mar. 1999, pp. 104-114.
[17] Nokia Mobile Internet Toolkit,http:/, 2003.
[18] T.L. Pham, G. Schneider, S. Goose, and A. Pizano, Composite Devices Computing Environment: A Framework for Situated Interaction Using Small Screen Devices Personal and Ubiquitous Computing, vol. 5, no. 1, pp. 25-28, 2001.
[19] J.-P. Richter and H. de Meer,"Towards Formal Semantics for QoS Support," Proc. 17th Ann. Joint Conf. IEEE Computer and Communications Societies (INFOCOM 98), vol. 2, IEEE Press, Piscataway, N.J., pp. 472-479.
[20] S. Saha, M. Jamtgaard, and J. Villasenor, “Bringing the Wireless Internet to Mobile Devices,” Computer, vol. 34, no. 6, pp. 54-58, June 2001.
[21] T. Shimada, N. Iwami, T. Tomokane, M. Hayashi, and Y. Kuwahara, Interactive Scaling Control Mechanism for World-Wide Web Systems Proc. Sixth World Wide Web Conf. (WWW6), pp. 1467-1477, 1997.
[22] J.R. Smith, R. Mohan, and C.-S. Li, Transcoding Internet Content for Heterogeneous Client Devices Proc. IEEE Int'l Symp. Circuits and Systems (ISCAS), May 1998.
[23] D. Stuard, Voice Quality in PCS and Cellular Networks: Solutions for Echo Mobile Radio Technology, Sept. 1998.

Index Terms:
Content adaptation, content negotiation, user preferences, decision engine, context awareness, mobile computing.
Wai Yip Lum, Francis C.M. Lau, "User-Centric Content Negotiation for Effective Adaptation Service in Mobile Computing," IEEE Transactions on Software Engineering, vol. 29, no. 12, pp. 1100-1111, Dec. 2003, doi:10.1109/TSE.2003.1265524
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