Taking the Trash Back In: Practical Joint Channel and Network Coding for Improving IEEE 802.11 Networks

Juan A. Cabrera, Guang Nguyen, Daniel Enrique Lucani Rötter, Morten V. Pedersen, Frank H. P. Fitzek

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearchpeer-review


    Although Forward Error Correction (FEC) is key to the efficient operation of wireless communications networks, it can result in the recovery of an erroneous message. Practical systems detect it by using a CRC and discarding the packet. However, we are discarding potentially useful information, while forcing the system to re-transmit the data. Network coded flows can correct these errors by exploiting the network code structure, albeit by incurring in added computational costs, e.g., using PRAC. This paper has two objectives. First, quantify the fraction of packets that the FEC recovers with errors and the rate of bits flipped in each of these packets for different data rates in 802.11g. Our measurements show that for 54 Mbps, 46% of received packets have errors after FEC, but that the amount of bit errors per packet is small. Thus, there is a potential to double the effective data rate when using network coding for error correction. Second, advocate for a new technique for error correction in coded flows that reduces the computational effort by an order of magnitude or more compared to PRAC and more than doubles the number of errors that can be corrected while maintaining an acceptable computation time.

    Original languageEnglish
    Title of host publicationEuropean Wireless 2017 - 23rd European Wireless Conference : Proceedings of the 23th European Wireless Conference
    Number of pages5
    PublisherVDE Verlag GmbH
    Publication date17 Aug 2017
    Article number8011333
    ISBN (Print)978-3-8007-4426-8
    ISBN (Electronic)9783800744268
    Publication statusPublished - 17 Aug 2017
    EventEuropean Wireless 2017 - Barkhausen-Bau (BAR), Dülfer-Saal Mensa , Festsaal Rektorat + Toepler-Bau (TOE) , Dresden, Germany
    Duration: 17 May 201719 May 2017


    ConferenceEuropean Wireless 2017
    LocationBarkhausen-Bau (BAR), Dülfer-Saal Mensa , Festsaal Rektorat + Toepler-Bau (TOE)
    Internet address


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