Minimizing Power Consumption in LTE Data Scheduling with the Constraints of Channel Condition and QoS

• Main Authors: Kuo, Yu-Hsien, 郭昱賢
• Other Authors: Lin, Ying-Dar
• Format: Others
• Language: en_US
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/44506414314621988776

碩士 === 國立交通大學 === 資訊科學與工程研究所 === 101 === LTE has become the next generation of communication technology. It has high data rate and broad network coverage, but it conversely introduces high power consumption. To resolve this problem, 3GPP has developed the Discontinuous Reception (DRX) power saving mechanism, which periodically turns off the radio interface to reduce power consumption. However, packets cannot be received during the turn-off time, as a result that the Quality of Services (QoS) may be violated. Therefore, optimal DRX parameters should be configured. In addition, channel condition may be unstable during the transmission, so the optimal DRX parameters should also be dynamically adjusted. In this thesis, we propose the Dynamic Scheduling with Extensible Allocation and Dispersed Offsets (DXD) scheme, which is composed of two algorithms, DRX parameter decision algorithm and DRX-aware scheduling algorithm. DRX parameter decision algorithm determines the DRX period by considering channel condition and QoS constraints, and then interlaces the turn-on time of each user. The scheduling algorithm determines whether to extend the turn-on time or not, so that QoS will not be affected by DRX. Simulation results demonstrate that our DXD approach can reduce power consumption up to 96.9% compared to No DRX scheme and guarantee QoS as good as no DRX scheme.