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Video QoS/QoE over IEEE802.11n/ac: A Contemporary Survey.

机译：IEEE802.11n / ac上的视频QoS / QoE：当代调查。

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摘要

The demand for video applications over wireless networks has tremendously increased, and IEEE 802.11 standards have provided higher support for video transmission. However, providing Quality of Service (QoS) and Quality of Experience (QoE) for video over WLAN is still a challenge due to the error sensitivity of compressed video and dynamic channels. This thesis presents a contemporary survey study on video QoS/QoE over WLAN issues and solutions. The objective of the study is to provide an overview of the issues by conducting a background study on the video codecs and their features and characteristics, followed by studying QoS and QoE support in IEEE 802.11 standards. Since IEEE 802.11n is the current standard that is mostly deployed worldwide and IEEE 802.11ac is the upcoming standard, this survey study aims to investigate the most recent video QoS/QoE solutions based on these two standards. The solutions are divided into two broad categories, academic solutions, and vendor solutions. Academic solutions are mostly based on three main layers, namely Application, Media Access Control (MAC) and Physical (PHY) which are further divided into two major categories, single-layer solutions, and cross-layer solutions. Single-layer solutions are those which focus on a single layer to enhance the video transmission performance over WLAN. Cross-layer solutions involve two or more layers to provide a single QoS solution for video over WLAN. This thesis has also presented and technically analyzed QoS solutions by three popular vendors. This thesis concludes that single-layer solutions are not directly related to video QoS/QoE, and cross-layer solutions are performing better than single-layer solutions, but they are much more complicated and not easy to be implemented. Most vendors rely on their network infrastructure to provide QoS for multimedia applications. They have their techniques and mechanisms, but the concept of providing QoS/QoE for video is almost the same because they are using the same standards and rely on Wi-Fi Multimedia (WMM) to provide QoS.
机译：通过无线网络对视频应用程序的需求已大大增加，并且IEEE 802.11标准为视频传输提供了更高的支持。但是，由于压缩视频和动态通道的错误敏感性，在WLAN上为视频提供服务质量（QoS）和体验质量（QoE）仍然是一个挑战。本文提出了有关基于WLAN的视频QoS / QoE问题和解决方案的当代调查研究。该研究的目的是通过对视频编解码器及其特征和特性进行背景研究，然后研究IEEE 802.11标准中的QoS和QoE支持，来概述这些问题。由于IEEE 802.11n是当前在全球范围内广泛部署的当前标准，而IEEE 802.11ac是即将发布的标准，因此本调查研究旨在研究基于这两个标准的最新视频QoS / QoE解决方案。这些解决方案分为两大类：学术解决方案和供应商解决方案。学术解决方案主要基于三个主要层，即应用程序，媒体访问控制（MAC）和物理（PHY），它们又分为两个主要类别，即单层解决方案和跨层解决方案。单层解决方案是那些专注于单层以增强WLAN上的视频传输性能的解决方案。跨层解决方案涉及两层或多层，以为WLAN视频提供单一QoS解决方案。本文还介绍了三种流行的供应商的QoS解决方案并对其进行了技术分析。本文得出的结论是，单层解决方案与视频QoS / QoE并不直接相关，跨层解决方案的性能要优于单层解决方案，但它们要复杂得多，并且不易实现。大多数供应商都依靠其网络基础架构为多媒体应用程序提供QoS。它们具有自己的技术和机制，但是为视频提供QoS / QoE的概念几乎相同，因为它们使用相同的标准并依靠Wi-Fi多媒体（WMM）来提供QoS。

著录项

  • 作者

    Hama Amin, Rebeen R.;

  • 作者单位

    Rochester Institute of Technology.;

  • 授予单位 Rochester Institute of Technology.;
  • 学科 Information technology.;Computer science.
  • 学位 M.S.
  • 年度 2016
  • 页码 83 p.
  • 总页数 83
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 公共建筑;
  • 关键词

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