LTE网络中视频流下行调度的性能研究

Meng-Hsien Lin, Yen-Wen Chen
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引用次数: 0

摘要

LTE (Long Term Evolution)网络被认为是下一代无线网络,为新兴的移动应用提供高带宽和低延迟。节能问题对业务部署的成功与否至关重要。本文提出了一种新的LTE网络下行链路调度方法,在保证视频流接收质量的同时降低功耗。该调度器考虑用户设备(UE)的缓冲区长度和信道条件来分配无线电资源,使UE在RRC_Connected状态下,特别是信道条件好的情况下,能够接收到尽可能多的视频数据包,而在其缓冲的视频数据足够播放的情况下,UE在RRC_Idle状态下保持越长越好,以节省电力。采用1080P分辨率视频流量模型进行详尽仿真,以检验所提方案的性能。仿真结果表明了在节能和信令开销问题之间的权衡。并对相关参数的影响进行了研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance study of downlink scheduling for video streaming in LTE network
The Long Term Evolution (LTE) network is recognized as the next generation wireless network, which provides high bandwidth and low latency for emerging mobile applications. The issue of power saving is very crucial for the success of service deployment. This paper presents a novel downlink scheduling approach to reduce power consumption while maintaining the receiving quality of video streaming in LTE network. The proposed scheduler considers the buffer length and channel conditions of user equipment (UE) to allocate radio resource, so that the UE can receive as many video packets as possible when the UE is in the RRC_Connected state especially with good channel condition, while the UE will stay in the RRC_Idle state the longer the better to save power given that its buffered video data is enough to play. The 1080P resolution video traffic model was applied for exhaustive simulations to examine the performance of the proposed scheme. The simulation results indicate the tradeoff between the power saving and signaling message overhead issues. And the impacts of related parameters are also studied in this paper.
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