M3: Practical and reliable multi-layer video multicast over multi-rate Wi-Fi network

Menghan Li, Dan Pei, Xiaoping Zhang, Beichuan Zhang, Zhi Wang, Hailiang Xu, Zihan Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

IEEE 802.11-based wireless LAN, commonly referred to as Wi-Fi, has become a universal solution for the last-hop network access. In large and public assembly places, people may use their mobile devices to view the video of the same popular events via the same wireless access points (APs). However, current 802.11 APs transmit the same video stream multiple times via separate unicast sessions due to the well-known poor reliability and low data rate of the legacy Wi-Fi multicast. Besides, in traditional single-layer-coded video streams, all clients have to settle with the lowest video bitrate limited by the client with the worst channel quality. To address these problems, we propose M3, a practical and reliable multi-layer video multicast solution over multi-rate Wi-Fi networks. The aims of our system are, in the premise of no change to APs, not only to ensure that all clients can smoothly watch the video at least with the lowest quality, but also to maximize the overall video quality received by all clients. To meet these design goals, the video server selects certain clients as unicast receivers to transmit different SVC video layers, and other clients listen for the packets in the promiscuous mode. It is challenging to select specific unicast receivers and allocate different SVC layers to fully utilize the available bandwidth because of dynamic network conditions. To overcome this challenge, we use a periodical feedback mechanism to collect necessary statistics from clients, and use them to derive an optimal SVC-layer allocation strategy to maximize the video quality. We implemented a prototype in a real Wi-Fi testbed consisting of one AP and one M3 server and 8 clients. Compared with the single-layer video multicast, our M3 system can improve the total received video rate by up to 200%

Original languageEnglish (US)
Title of host publication2016 IEEE/ACM 24th International Symposium on Quality of Service, IWQoS 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509026340
DOIs
StatePublished - Oct 13 2016
Event24th IEEE/ACM International Symposium on Quality of Service, IWQoS 2016 - Beijing, China
Duration: Jun 20 2016Jun 21 2016

Publication series

Name2016 IEEE/ACM 24th International Symposium on Quality of Service, IWQoS 2016

Other

Other24th IEEE/ACM International Symposium on Quality of Service, IWQoS 2016
CountryChina
CityBeijing
Period6/20/166/21/16

ASJC Scopus subject areas

  • Management of Technology and Innovation
  • Computer Networks and Communications
  • Media Technology
  • Safety, Risk, Reliability and Quality

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