Distortion optimized multi-service scheduling for next-generation wireless mesh networks

Andre B. Reis, Jacob Chakareski, Andreas Kassler, Susana Sargento

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

29 Scopus citations


Distributing multimedia content over wireless networks is challenging due to the limited resource availability and the unpredictability of wireless links. As more and more users demand wireless access to (real-time) multimedia services, the impact of constrained resources is different for different media types. Therefore, understanding this impact and developing mechanisms to optimize content delivery under resource constraints according to user perception will be key in improving user satisfaction. In this paper, we develop a novel scheduling algorithm for multi-hop wireless networks, which optimizes packet delivery for multiple audio, video and data flows according to user perceivable quality metrics. We formulate a multidimensional optimization problem to minimize the overall distortion while satisfying resource constraints for the wireless links. Our Quality-of-Experience (QoE)-optimized scheduler makes use of models to determine the user's perception of quality that are specific to the type of service being provided. Our experimental results, obtained with the NS-2 IEEE 802.16 MESH-mode simulator, show that distortion-aware scheduling can significantly increase the perceived quality of multimedia streaming under bandwidth constraints. As the scheduler allows the modeling of fairness constraints among multiple competing flows, we also demonstrate an improvement in fairness across different flows.

Original languageEnglish (US)
Title of host publicationINFOCOM 2010 - IEEE Conference on Computer Communications Workshops
StatePublished - 2010
Externally publishedYes
EventIEEE Conference on Computer Communications Workshops, INFOCOM 2010 - San Diego, CA, United States
Duration: Mar 15 2010Mar 19 2010

Publication series

NameProceedings - IEEE INFOCOM
ISSN (Print)0743-166X


ConferenceIEEE Conference on Computer Communications Workshops, INFOCOM 2010
Country/TerritoryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

  • General Computer Science
  • Electrical and Electronic Engineering


  • Distortion
  • E-model
  • IEEE 802.16
  • Mean opinion score
  • PSNR
  • Quality of experience
  • WiMAX


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