Mobile Networks and Applications

, Volume 12, Issue 1, pp 5–14 | Cite as

Dynamic Power Saving Mechanism for 3G UMTS System



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.


adaptive algorithm discontinuous reception (DRX) power saving Universal Mobile Telecommunications System (UMTS) 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    3GPP (2000) 3rd generation partnership project, Technical specification group radio access network, RRC protocol specification for release 1999. Technical specification 3G TS 25.331 version 3.5.0 (2000-12)Google Scholar
  2. 2.
    3GPP (2000) 3rd generation partnership project, Technical specification group services and systems aspects, General packet radio service (GPRS), service description, stage 2. Technical specification 3G TS 23.060 version 3.6.0 (2001-01)Google Scholar
  3. 3.
    3GPP (2001) 3rd generation partnership project, Technical specification group radio access network, UTRA high speed downlink packet access. Technical specification 3G TR 25.950 version 4.0.0 (2001-03)Google Scholar
  4. 4.
    3GPP (2002) 3rd generation partnership project, Technical specification group radio access network, UE procedures in idle mode and procedures for cell reselection in connected mode. Technical specification 3G TS 25.304 version 5.1.0 (2002-06)Google Scholar
  5. 5.
    CDPD Forum (January 1995) Cellular digital packet data system specification: release 1.1. Technical report. CDPD Forum, Chicago, ILGoogle Scholar
  6. 6.
    Chlamtac I, Fang Y, Zeng, H (1999) Call blocking analysis for PCS networks under general cell residence time. In: IEEE Wireless communications and networking conference (WCNC), New Orleans, September 1999Google Scholar
  7. 7.
    Fang Y, Chlamtac I (July 1999) Teletraffic analysis and mobility modeling for PCS networks. IEEE Trans Commun 47(7):1062–1072CrossRefGoogle Scholar
  8. 8.
    Fang Y, Chlamtac I, Fei H-B (June 2000) Analytical results for optimal choice of location update interval for mobility database failure restoration in PCS networks. IEEE Trans Parallel Distrib Syst 11(6):615–624CrossRefGoogle Scholar
  9. 9.
    Holma H, Toskala A (2000) WCDMA for UMTS. New York, WileyGoogle Scholar
  10. 10.
    IEEE (April 1996) Wireless medium access control (MAC) and Physical layer (PHY) specifications. Draft standard 802.11 D3.1Google Scholar
  11. 11.
    Kelly FP (1979) Reversibility and stochastic networks. New York, WileyMATHGoogle Scholar
  12. 12.
    Kwon SJ, Chung YW, Sung DK (July 2003) Queueing model of sleep-mode operation in cellular digital packet data. IEEE Trans Veh Technol 52(4):1158–1162CrossRefGoogle Scholar
  13. 13.
    Lin Y-B (1996) Estimating the likelihood of success of lazy cancellation in time warp simulations. Inter J Comput Simul 6(2):163–174Google Scholar
  14. 14.
    Lin Y-B, Chlamtac I (2001) Wireless and mobile network architectures. New York, WileyGoogle Scholar
  15. 15.
    Lin Y-B, Chuang Y-M (March 1999) Modeling the sleep mode for cellular digital packet data. IEEE Commun Lett 3(3):63–65CrossRefGoogle Scholar
  16. 16.
    Maron MJ, Lopez RJ (1991) Numerical analysis a practical approach, 3rd edn. Wadsworth, Belmont, CAMATHGoogle Scholar
  17. 17.
    RAM Mobile Data (1994) Mobitex interface specification. Technical report. RAM Mobile DataGoogle Scholar
  18. 18.
    Salkintzis AK, Chamzas C (September 1998) An in-band power-saving protocol for mobile data networks. IEEE Trans Commun 46(9):1194–1205CrossRefGoogle Scholar
  19. 19.
    Salkintzis AK, Chamzas C (May 2000) Performance analysis of a downlink MAC protocol with power-saving support. IEEE Trans Veh Technol 49(3):1029–1040CrossRefGoogle Scholar
  20. 20.
    Salkintzis AK, Chamzas C (September 2002) An outband paging protocol for energy-efficient mobile communications. IEEE Trans Broadcast 48(3):246–256CrossRefGoogle Scholar
  21. 21.
    Takagi H (1991) Queueing analysis—volume 1: vacation and priority systems, part 1. The Netherlands, AmsterdamGoogle Scholar
  22. 22.
    Yang S-R, Lin Y-B (November 2003) Performance evaluation of location management in UMTS. IEEE Trans Veh Technol 52(6):1603–1615CrossRefGoogle Scholar
  23. 23.
    Yang S-R, Lin Y-B (January 2005) Modeling UMTS discontinuous reception mechanism. IEEE Trans Wirel Commun 4(1):312–319CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.Department of Computer ScienceNational Tsing Hua UniversityHsinchuRepublic of China

Personalised recommendations