| 摘要(英) |
In recent decades, broadband wireless access network has been rapidly evolved to allow users enjoying high-speed internet service wherever and whenever, but the ensuing issue of power consumption of mobile devices has become a very important problem.
In the traditional scheduling mechanisms in the downlink of LTE system, eNodeB allocates spectrum to the active or light sleep UE according to the information of UE’s need and state, which is the foundation of resource allocation. . However, it doesn’t take power saving mechanism into consideration, which may cause unnecessary power consumption for the reason that UE’s QoS is more than its actual QoS requirement while allocating the resource.
In this paper, we propose a downlink scheduling method in LTE system ,taking channel quality, packet delay, and power consumption into consideration , to improve the efficient use of radio resource .Moreover, through the dynamic change of DRX parameter, the efficiency of power saving is enhanced.
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| 參考文獻 |
[1]S. L. Tsao and Y. L. Chen, “Energy-efficient packet scheduling algorithms for real-time communications in a mobile WiMAX system,”Comput.Commun., vol. 31, no. 10, pp. 2350–2359, Jun. 2008.
[2]http://www.mem.com.tw/article_content.asp?sn=1112020004 (2012/6/19)
[3]Moray Rumney BSc, C. Eng, MIET,"3GPP LTE: Introducing Single-Carrier FDMA,"Agilent Measurement Journal, Issue 4, pp.18-27, January 2008
[4]3GPP TS 36.300 V9.2.0. Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2
[5]3GPP TS 23.401 V9.3.0. General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access
[6]3GPP TS 36.321 V9.0.0, Evolved Universal Terrestrial Radio Access (E-UTRA) Medium Access Control (MAC) protocol specification
[7]De Turck, S. De Vuyst, D. Fiems, S. Wittevrongel, H. Bruneel, "Performance analysis of sleep mode mechanisms in the presence of bidirectional traffic",in Computer Networks Vol.56, no.10, pp.2494–2505 ,5 July 2012
[8]3GPP TSG-RAN WG2 Meeting #57bis, R2-071285,St. Julian’s, Malta, Agenda item:5.2.3, Source: Nokia , Title: DRX parameters in LTE
[9]Jeroen Wigard, Troels Kolding, Lars Dalsgaard, Claudio Coletti, Nokia Siemens Networks, Res. Center Aalborg, Aalborg East, Denmark, "On the User Performance of LTE UE Power Savings Schemes with Discontinuous Reception in LTE", Communications Workshops 2009, pp. 1-5,June 2009
[10]B. Huang, H. Tian, L. Chen, and J. Zhu, “DRX-aware Scheduling Method for Delay-Sensitive Traffic,” IEEE Communications Letters, 14(12), pp. 1113-1115, 2010.
[11]Y. Y. Mihov, K. M. Kassev, and B. P. Tsankov, “Analysis and performance evaluation of the DRX mechanism for power saving in LTE,” in Proc.IEEE IEEEI, pp. 000520–000524, Nov. 2010
[12]3GPP TS 23.203 V9.4.0, Technical Specification Group Services and System Aspects, Policy and charging control architecture
[13]3GPP TS 36.211 V9.1.0, Evolved Universal Terrestrial Radio Access (E-UTRA),Physical Channels and Modulation
[14]3GPP TS 36.213 V9.1.0, Evolved Universal Terrestrial Radio Access (E-UTRA), Physical layer procedures
[15]3GPP TS 36.101, Evolved Universal Terrestrial Radio Access (E-UTRA), User Equipment (UE) radio transmission and reception
[16]3GPP TR 25.892 V6.0.0,Technical Specification Group Radio Access Network, Feasibility Study for Orthogonal Frequency Division Multiplexing (OFDM) for UTRAN enhancement
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