On the packet delay characteristics for serially-connected links using random linear network coding with and without recoding

Research output: Contribution to book/conference proceedings/anthology/reportConference contributionContributedpeer-review

Contributors

  • Máté Tömösközi - , Acticom GmbH, Aalborg University, Budapest University of Technology and Economics (Author)
  • Frank H.P. Fitzek - , Acticom GmbH, Aalborg University (Author)
  • Daniel E. Lucani - , Aalborg University (Author)
  • Morten V. Pedersen - , Aalborg University (Author)
  • Patrick Seeling - , Central Michigan University (Author)
  • Péter Ekler - , Budapest University of Technology and Economics (Author)

Abstract

Low latency and high reliability are critical characteristics of many wireless use cases, such as real-time video surveillance. In a dense network, the best way to resolve such problems is by utilizing the fastest and most reliable connection to the destination, typically through relaying. Classical solutions, such as Reed-Solomon codes, increase the reliability, but also introduce additional coding delays at the relays. This paper describes the reduction of the packet delay achievable by network coding through a series of network nodes. Our metric captures the elapsed time between (network) encoding RTP frames and complete decoding of the packets on the receiver side while playing out the video recording contained in the payload. Our solutions are implemented and evaluated on serially connected Raspberry Pi devices and a network (de)coding enabled software running on a regular PC. We find that the recoding relays work at least as well as the systematic approach to network coding. In all cases network coding outperformed schemes employing classical Reed-Solomon codes. This low per-packet delay and the inherent reliability of our schemes make these solutions particularly suitable for real-time multimedia delivery in contrast to other classical and network coding strategies.

Details

Original languageEnglish
Title of host publicationProceedings of 21st European Wireless Conference, European Wireless 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (electronic)9783800739769
Publication statusPublished - 2015
Peer-reviewedYes
Externally publishedYes

Conference

Title21st European Wireless Conference, European Wireless 2015
Duration20 - 22 May 2015
CityBudapest
CountryHungary

External IDs

ORCID /0000-0001-8469-9573/work/161891306

Keywords

ASJC Scopus subject areas

Keywords

  • Network coding, Real-time delay, Video streaming, Video surveillance