| 摘要(英) |
Recently, mobile communication technologies have been developed rapidly. The IEEE 802.16e wireless metropolitan area network (WMAN) standard is an emerging technology to support roaming mobility of mobile stations (MSs) in outdoor environment. For MSs powered by batteries, the standard supports power saving mode to conserve battery power meanwhile fulfilling the requirements of quality of services. Regarding to different service types, standard defines three different power saving types for them and each type has its own power saving parameters.
By setting appropriate parameters, single type of power saving will work well for extending the battery life. However, if the number of established connections of MS is more than one and the number of associated power saving type is more than one, the sleeping behavior is not following the setting parameters because that the MS will enter sleep mode only when all of connections decide to enter sleep at a same time. In other words, for a time frame, if there is any one connection is in listening mode, the MS shall not turn down the wireless transceiver. Therefore, such multi-connection case may degrade power saving efficiency. In this dissertation, we propose a smart strategy for base station (BS) to configure the parameters of power saving classes for MSs with multiple connections. At first, we explain and discuss the features of IEEE 802.16e sleep modes and then propose a smart strategy for merging parameters of different power saving classes in order to extend the battery life. Performance of proposed strategy is evaluated by simulations and simulation results illustrate that the proposed strategy with single parameter set outperforms the standard strategy with multiple parameter sets. |
| 參考文獻 |
[1] IEEE 802.16-2001, ”IEEE Standard for Local and Metropolitan Area Networks - Part 16: Air Interface for Fixed Broadband Wireless Access Systems”, Arp. 2002.
[2] IEEE 802.16-2004, ”IEEE Standard for Local and Metropolitan Area Networks - Part 16: Air Interface for Fixed Broadband Wireless Access Systems”, Oct. 2004.
[3] Intel, “The Wireless City,” Intel White Paper, December, 2003. available at
[4] Intel, “Understanding Wi-Fi and WiMAX as Metro-Access Solutions,” Intel White Paper, October 2004. available at
[5] Intel, “IEEE 802.16 and WiMAX,” Intel White Paper, July 1, 2003. available at
[6] Lonnie McAlister, “發揮WiMAX的極致效能,” 通訊雜誌, pp. 24-32, November 2004.
[7] Lonnie McAlister, “全球互通的寬頻無線網路,” 通訊雜誌, pp. 32-36, January 2005.
[8] IEEE 802.16e-2005, ”IEEE Standard for Local and metropolitan area networks Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands and Corrigendum 1 ”, Feb. 2006.
[9] Y. Xiao, ”Energy saving mechanism in the IEEE 802.16e wireless MAN”, IEEE Communications Letters, vol 9, pp. 595-597, Jul. 2005.
[10] Y. Xiao, ”Performance analysis of an energy saving mechanism in the IEEE 802.16e wireless MAN”, in Proc. CCNC 2006, vol 1, pp. 406-410, Jan. 2006.
[11] Jun-Bae Seo; Seung-Que Lee; Nam-Hoon Park; Hyong-Woo Lee; Choong-Ho Cho, ”Performance analysis of sleep mode operation in IEEE 802.16e”, in Proc. IEEE VTC 2004-Fall, vol 2, pp. 1169-1173, Sep. 2004.
[12] Kwanghun Han; Sunghyun Choi, ”Performance Analysis of Sleep Mode Operation in IEEE 802.16e Mobile Broadband Wireless Access Systems”, in Proc. IEEE VTC 2006-Spring, Melbourne, Australia, May. 2006.
[13] Lei Kong; Danny H.K.Tsang, ”Performance Study of Power Saving Classes of Type I and II in IEEE 802.16e”, in Proc. LCN 2006, Nov. 2006.
[14] Jaehyuk Jang; Kwanghun Han; Sunghyun Choi, ” Adaptive Power Saving Strategies for IEEE 802.16e Mobile Broadband Wireless Access”, in Proc. APCC 2006, Aug. 2006. |
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