通信学报 ›› 2017, Vol. 38 ›› Issue (9): 18-24.doi: 10.11959/j.issn.1000-436x.2017178

• 学术论文 • 上一篇    下一篇

基于Q-learning的HTTP自适应流码率控制方法研究

熊丽荣,雷静之,金鑫   

  1. 浙江工业大学计算机科学与技术学院,浙江 杭州 310023
  • 修回日期:2017-05-22 出版日期:2017-09-01 发布日期:2017-10-18
  • 作者简介:熊丽荣(1973-),女,湖北崇阳人,浙江工业大学副教授,主要研究方向为服务计算和计算机网络。|雷静之(1992-),女,江西抚州人,浙江工业大学硕士生,主要研究方向为服务计算、计算机网络。|金鑫(1991-),男,浙江台州人,浙江工业大学硕士生,主要研究方向为服务计算。
  • 基金资助:
    浙江省重大科技专项重大工业基金资助项目(2012C11026-2);杭州市重大科技创新专项基金资助项目(20132011A16)

Research on Q-learning based rate control approach for HTTP adaptive streaming

Li-rong XIONG,Jing-zhi LEI,Xin JIN   

  1. College of Computer Science and Technology,Zhejiang University of Technology,Hangzhou 310023,China
  • Revised:2017-05-22 Online:2017-09-01 Published:2017-10-18
  • Supported by:
    The Key Project of Science and Technology Planning Project of Zhejiang Province(2012C11026-2);The Special Found for Science and Technology Innovation Program of Hangzhou(20132011A16)

摘要:

基于HTTP的自适应流HAS已经成为自适应视频流服务的标准。在HAS客户端网络状态多变的情况下,硬编码形式的码率决策方法灵活性偏低,对用户体验考虑不足。为了优化用户体验质量(QoE),提出一种基于Q-Learning 的码率控制算法,结合 HTTP 自适应视频流客户端环境进行建模并定义状态转移规则;量化与用户QoE相关的参数,构建新的回报函数;实验表明引入Q-Learning进行码率调整的自适应算法在码率切换的稳定性方面表现较好。

关键词: HTTP自适应流, 硬编码, Q学习, 码率控制, 稳定性

Abstract:

HTTP adaptive streaming (HAS) has become the standard for adaptive video streaming service.In changing network environments,current hardcoded-based rate adaptation algorithm was less flexible,and it is insufficient to consider the quality of experience (QoE).To optimize the QoE of users,a rate control approach based on Q-learning strategy was proposed.the client environments of HTTP adaptive video streaming was modeled and the state transition rule was defined.Three parameters related to QoE were quantified and a novel reward function was constructed.The experiments were employed by the Q-learning rate control approach in two typical HAS algorithms.The experiments show the rate control approach can enhance the stability of rate switching in HAS clients.

Key words: HTTP adaptive streaming, hardcoded, Q-learning, rate control, stability

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