标题: | 应用于物联网及LTE-A网路之具服务品质的省电排程方法 An Energy-Efficient Sleep Scheduling with QoS Consideration in 3GPP LTE-Advanced Networks for Internet of Things |
作者: | 郑弘欣 Cheng, Hung-Hsin 曾煜棋 Tseng ,Yu-Chee 资讯学院资讯学程 |
关键字: | 长期演进技术;物联网;省电;服务品质;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: | 随着资料通讯的设计受到重视,3GPP LTE-Advanced (LTE-A)对于物联网是最有前景的技术之一。在物联网(IoT)应用方面,因为低速率的串流资料会由装置端持续回报一段长时间,所以在节省能源方面需要严格要求。为了管理能源消耗,3GPP LTE-A定义了Discontinuous Reception/Transmission (DRX/DTX)机制能够允许装置关闭无线电介面,并进行不同的睡眠模式。现有的文献对于评估DRX/DTX的效能非常重视;然而如何去最佳化DRX/DTX参数以达到最好耗能成本仍是一个开放的议题。本文着重于DRX/DTX最佳化,在保证QoS的状况下,最大化装置的睡眠时间,特别是在物联网应用方面的传输速率、封包延迟与封包遗失率。我们提出有效的方法最佳化DRX/DTX参数同时规划排程在基地台上的装置封包。主要的关键是我们的方法必须在QoS参数造成的影响与DRX/DTX设定之间取得平衡。模拟结果显示我们的方法在节省装置耗能的同时能够保证传输速率、封包延迟与封包遗失率。 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 |