Abstract
Wi-Fi hotspots are one of the most promising scenarios for mobile computing. In this scenario, a very limiting factor is the scarcity of mobile-device energetic resources. Both hardware and software architectures of current devices are very inefficient from this standpoint, mainly the networking subsystem. This work analyzes a power-saving network architecture for the mobile-Internet access through Wi-Fi hotspots. Specifically, this solution supports any kind of best-effort network applications, since it is application-independent. In this paper we derive a complete analytical model of the power-saving system when applied to mobile Web access. Furthermore, we use this model to compare our solution with a well-known approach, i.e., the Indirect-TCP. The comparison is performed by considering two performance figures: the energy saved in downloading a Web page and the related transfer-time. The results show that, in the average, our solution saves up to 78% of the energy. Furthermore, the power-saving system introduces an additional average transfer-time of 0.4 sec, and hence it does not significantly affect the QoS perceived by the users. Finally, we assess the sensitiveness of the power-saving system with respect to Internet key parameters, such as the available throughput and the RTT.
This work was carried out under the financial support of the Italian Ministry for Education and Scientific Research (MIUR) in the framework of the Projects: FIRB-PERF and FIRB-VICOM.
Chapter PDF
Similar content being viewed by others
References
Agrawal, S., Singh, S.: An Experimental Study of TCP’s Energy Consumption over a Wireless Link. In: 4th European Personal Mobile Communications Conference, Vienna, Austria, February 20–22 (2001)
Anastasi, G., Conti, M., Lapenna, W.: A Power Saving Network Architecture for Accessing the Internet from Mobile Computers: Design, Implementation and Measurements. The Computer Journal 46(1), 3–15 (2003)
Anastasi, G., Conti, M., Gregori, E., Passarella, A.: A power saving architecture for web access from mobile computers. In: Gregori, E., Conti, M., Campbell, A.T., Omidyar, G., Zukerman, M. (eds.) NETWORKING 2002. LNCS, vol. 2345, pp. 240–251. Springer, Heidelberg (2002)
Anastasi, G., Conti, M., Gregori, E., Passarella, A.: Balancing Energy Saving and QoS in the Mobile Internet: An Application-Independent Approach. In: Proceedings of the 36th Hawaii Int. Conf. on System Sciences (HICSS–36) (January 2003)
Anastasi, G., Conti, M., Gregori, E., Passarella, A.: Performance Comparison of Power Saving Strategies for Mobile Web Access. Performance Evaluation (to appear)
Anastasi, G., Conti, M., Gregori, E., Passarella, A.: Power-Saving in Wi-Fi Hotspots: an Analytical Study (Extended Version), Tech. Rep. DII03–5, Dept. of Information Engineering, University of Pisa (May 2003), available at http://www.ing.unipi.it/~o783499/research/docs/PWC_WiFi_ext.pdf
Bakre, A., Badrinath, B.R.: Implementation and Performance Evaluation of Indirect TCP. IEEE Trans. on Computers 46(3) (1997)
Balakrishnan, H., Padmanabhan, V.N., Seshan, S., Katz, R.H.: A Comparison of Mechanisms for Improving TCP Performance over Wireless Links. IEEE/ACM Trans. on Networking 5(6) (December 1997)
Barford, P., Crovella, M.: Generating Representative Web Workloads for Network and Server Performance Evaluation. In: Proc. of ACM SIGMETRICS 1998, June 1998, pp. 151–160 (1998)
Barford, P., Bestavros, A., Bradley, A., Crovella, M.: Changes in Web Client Access Patterns. World Wide Web (special Issue on Characterization and Performance Evaluation) (1999)
Bononi, L., Conti, M., Donatiello, M.: A distributed mechanism for power saving in IEEE 802.11 wireless LANs. Mobile Networks Applic (MONET) 6, 211–222 (2001)
Bruno, R., Conti, M., Gregori, E.: Optimization of efficiency and energy consumption in p-persistent CSMA-based wireless LANs. IEEE Trans. Mobile Comput. 1, 10–31 (2002)
Crovella, M., Bestavros, A.: Self-Similarity in World Wide Web Traffic: Evidence and Possible Causes. IEEE/ACM Trans. on Networking 5(6), 835–846 (1997)
Feeney, L.M., Nilsson, M.: Investigating the energy consumption of a wireless network interface in an ad hoc networking environment. In: Proceedings of the 20th IEEE Computer and Communications Societies Conf. (INFOCOM 2001) (2001)
Herbster, M., Warmuth, M.K.: Tracking the best expert. In: Proceedings of the 12th Int. Conf. on Machine Learning, pp. 286–294 (1995)
IEEE standard for Wireless LAN – Medium Access Control and Physical Layer Specification, P802.11 (November 1997)
Kravets, R., Krishna, P.: Power Management Techniques for Mobile Communication. In: Proc. of the 4th ACM/IEEE Int. Conf. on Mobile Computing and Networking, Mobicom 1998 (1998)
Krashinsky, R., Balakrishnan, H.: Minimizing Energy for Wireless Web Access with Bounded Slowdown. In: Proc. 8th Int. Conf. on Mobile Computing and Networking, Mobicom 2002 (2002)
Mathis, M., Semke, J., Mahdavi, J., Ott, T.: The macroscopic behavior of the TCP Congestion Avoidance Algorithm. Computer Communication Review 27(3) (July 1997)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2003 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Anastasi, G., Conti, M., Gregori, E., Passarella, A. (2003). Power-Saving in Wi-Fi Hotspots: An Analytical Study. In: Conti, M., Giordano, S., Gregori, E., Olariu, S. (eds) Personal Wireless Communications. PWC 2003. Lecture Notes in Computer Science, vol 2775. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39867-7_31
Download citation
DOI: https://doi.org/10.1007/978-3-540-39867-7_31
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-20123-6
Online ISBN: 978-3-540-39867-7
eBook Packages: Springer Book Archive