标题: 應用於物聯網及LTE-A網路之具服務品質的省電排程方法
An Energy-Efficient Sleep Scheduling with QoS Consideration in 3GPP LTE-Advanced Networks for Internet of Things
作者: 鄭弘欣
Cheng, Hung-Hsin
曾煜棋
Tseng ,Yu-Chee
資訊學院資訊學程
关键字: 長期演進技術;物聯網;省電;服務品質;睡眠排程;Long Term Evolution-Advanced (LTE-Advanced);Discontinuous Reception/Transmission (DRX/DTX);Internet of things (IoT);Power Saving;Quality of Service;Sleep Scheduling
公开日期: 2012
摘要: 隨著資料通訊的設計受到重視,3GPP LTE-Advanced (LTE-A)對於物聯網是最有前景的技術之一。在物聯網(IoT)應用方面,因為低速率的串流資料會由裝置端持續回報一段長時間,所以在節省能源方面需要嚴格要求。為了管理能源消耗,3GPP LTE-A定義了Discontinuous Reception/Transmission (DRX/DTX)機制能夠允許裝置關閉無線電介面,並進行不同的睡眠模式。現有的文獻對於評估DRX/DTX的效能非常重視;然而如何去最佳化DRX/DTX參數以達到最好耗能成本仍是一個開放的議題。本文著重於DRX/DTX最佳化,在保證QoS的狀況下,最大化裝置的睡眠時間,特別是在物聯網應用方面的傳輸速率、封包延遲與封包遺失率。我們提出有效的方法最佳化DRX/DTX參數同時規劃排程在基地台上的裝置封包。主要的關鍵是我們的方法必須在QoS參數造成的影響與DRX/DTX設定之間取得平衡。模擬結果顯示我們的方法在節省裝置耗能的同時能夠保證傳輸速率、封包延遲與封包遺失率。
With the design of data communications in mind, 3GPP LTE-Advanced (LTE-A) is probably the most promising technology for Internet of Things (IoT). For IoT applications, continuous low-rate streaming data may be reported from devices over a long period of time, imposing stringent requirements on power saving. To manage power consumption, 3GPP LTE-A has defined the Discontinuous Reception/Transmission (DRX/DTX) mechanism to allow devices to turn off their radio interfaces and go to sleep in various patterns. Existing literature has paid much attention to evaluate the performance of DRX/DTX; however, how to tune DRX/DTX parameters to optimize energy cost is still left open. This paper addresses the DRX/DTX optimization, by asking how to maximize the sleep periods of devices while guarantee their QoS, especially on the aspects of traffic bit-rate, packet delay, and packet loss rate in IoT applications. Efficient schemes to optimize DRX/DTX parameters and schedule devices’ packets with the base station are proposed. The key idea of our schemes is to balance the impacts between QoS parameters and DRX/DTX configurations. Simulation results show that our schemes can guarantee traffic bit-rate, packet delay, and packet loss rate while saving much energy of UEs.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT079979525
http://hdl.handle.net/11536/50966
显示于类别:Thesis