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Dynamic Power Saving Mechanism for 3G UMTS System

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Abstract

This paper investigates the power saving mechanism of Universal Mobile Telecommunications System (UMTS). UMTS discontinuous reception (DRX) is exercised between the network and a mobile station (MS) to save the power of the MS. The DRX mechanism is controlled by two parameters: the inactivity timer threshold t I and the DRX cycle t D . Analytic analysis and simulation model are proposed to study the optimal t I and t D selections that maximize the MS power saving under the given mean packet waiting time constraint. We also devise an adaptive algorithm called dynamic DRX (DDRX). This algorithm dynamically adjusts the t I and t D values to enhance the performance of UMTS DRX. Our study quantitatively shows how to select the best inactivity timer and DRX cycle values for various traffic patterns. We also show that DDRX nicely captures the user traffic patterns, and always adjusts the t I and t D close to the optimal values.

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Authors and Affiliations

  1. Department of Computer Science, National Tsing Hua University, Hsinchu, Taiwan, Republic of China

    Shun-Ren Yang

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  1. Shun-Ren Yang
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Correspondence to Shun-Ren Yang.

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Yang, SR. Dynamic Power Saving Mechanism for 3G UMTS System. Mobile Netw Appl 12, 5–14 (2007). https://doi.org/10.1007/s11036-006-0002-0

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  • DOI: https://doi.org/10.1007/s11036-006-0002-0

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