LTE resource-aware dynamic adaptive wireless multimedia streaming system

Bingjiang CAI

doi:10.11959/j.issn.1000-0801.2021001

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LTE resource-aware dynamic adaptive wireless multimedia streaming system

Engineering and Application | 更新时间：2024-06-05

- LTE resource-aware dynamic adaptive wireless multimedia streaming system
- Telecommunications Science Vol. 37, Issue 1, Pages: 147-158(2021)
- 作者机构：
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- DOI：10.11959/j.issn.1000-0801.2021001
  CLC： TN98
- Published Online：2021-01，
  
  Published：20 January 2021
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Bingjiang CAI. LTE resource-aware dynamic adaptive wireless multimedia streaming system[J]. Telecommunications science, 2021, 37(1): 147-158.
DOI：

Bingjiang CAI. LTE resource-aware dynamic adaptive wireless multimedia streaming system[J]. Telecommunications science, 2021, 37(1): 147-158. DOI： 10.11959/j.issn.1000-0801.2021001.

摘要

自适应流媒体技术用户体验的好坏，很大程度上由流媒体应用对端到端带宽估计的准确度决定，而在高度动态的LTE网络中，对带宽的估计极具挑战。设计并实现了一种基于LTE资源块感知的自适应无线流媒体系统，系统中的LTE资源块监测模块监测当前蜂窝小区范围内的物理层资源占用情况；速率映射机制据此将视频分片下载速率映射为当前可用带宽；码率自适应算法结合当前LTE网络中潜在可用带宽和当前视频缓存状况，选择最合适的码率版本，以实现视频质量和播放卡顿之间的折中。在原型系统上的测试实验中，与两种基线码率自适应算法进行对比，所提方法在保持极低的播放卡顿率的情况下获得了最高的平均视频码率，有效提升了用户的视频观看体验。

Abstract

The quality of user experience in adaptive video streaming

to a large extent

depends on the accuracy of the end-to-end bandwidth estimation.However

bandwidth estimation is very challenging in highly dynamic LTE network.LTE resource-aware dynamic adaptive wireless multimedia streaming system was designed and implemented in which the LTE resource block monitor module keeps monitoring the cell-wide physical layer resource utility.The rate scaling mechanism mapped the throughput to an estimation of available bandwidth and the rate adaption algorithm selected the most appropriate representation combining current available bandwidth with buffer state and played a trade-off between video quality and the risk of stalling.The experimental results on the prototype system show that comparing with the two baseline algorithms

the proposed system achieves the highest average video bitrate while maintaining a fairly low stalling rate

and effectively enhances the quality of experience.

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references

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