The Study of Radio Resource Management and Power Saving for Downlink in WiMAX Network

• Main Authors: Hao-An Fang, 方浩安
• Other Authors: Yen-Ｗen Chen
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/26017642723742605010

碩士 === 國立中央大學 === 通訊工程研究所 === 98 === 　　In recent years, energy saving and carbon reduction issues are continuously discussed. Many hardware or software developments focus on green technology. Several power saving issues are very widely discussed in communication equipment. 　　In IEEE 802.16e standard, the power saving mechanism is defined to extend the operation time for mobile devices through sleeping arrangement. However, IEEE 802.16e also provides QoS design to support various types of services to guarantee transmission quality. Traditionally, the packet scheduling in wireless environment consider the trade off between system throughput and QoS under the channel condition constraint. In this thesis, we propose a power saving centric scheduling scheme for the downlink traffic in WiMax network. This research proposes a just enough performance satisfaction scheduling scheme while achieving better power saving efficiency. Both of real time and non real time traffic types are considered. Once receiving the sleep request from the MS, the proposed scheme in BS performs the packet scheduling so that the MS can get longer sleeping period. Both partial arrangement and fully arrangement policies are discussed. The simulation results illustrates that the proposed scheme can achieve the above objectives under the QoS constraints.