Energy-Efficient DRX Scheduling for D2D Communication in LTE-A Network

• Main Authors: Huang, Chien-Feng, 黃健峰
• Other Authors: Tseng, Yu-Chee
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/553wr4

碩士 === 國立交通大學 === 資訊學院資訊學程 === 105 === In recent years, the intelligent devices such as smart phones and smart tablets are developed rapidly, the high-bandwidth media services such as live steaming and multi-user video conferencing are also increasing, resulting in spectrum resource depletion of the cellular network. To make more media applications served by the devices, 3GPP LTE-A has proposed a new technology, device-to-device (D2D) communications, to mitigate the spectrum depletion problem. However, the D2D communication accesses the same spectrum resources with cellular users, the transmission performance degrades significantly due to the interference. In addition, due to the frequent communication of media applications on mobile devices, the energy consumption is increasing dramatically. In view of this, this paper investigates how to well allocate radio resource to serve more D2D and cellular users on uplink transmissions and ensure their quality of service (QoS) while reducing unnecessary energy consumption. We propose an energy-efficient and low-complexity scheduling scheme. This scheme first establishes a conflict graph to maintain the relationship of transmission and interference, and tries to maximize the resource reuse between D2D and mobile users. At the same time, the scheme also exploits Discontinuous Reception Mechanism (DRX) technology to further optimize the devices’ sleep operation so as to achieve higher energy conservation. Simulation results show that our scheme can achieve higher performance on resource utilization and energy saving as compared to the existing schemes.