Opportunistic transmission scheme with Raptor code in IEEE 802.11 multirate WLANs

Dongwan Kim, Sun-Shin An

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In IEEE 802.11 wireless local area networks (WLANs), a fixed low transmission rate is used for multicast transmissions regardless of the channel conditions of the receivers. This may lead to inefficient use of the wireless channel, especially when the access point (AP) has both unicast and multicast data frames in the transmission queue. In this paper, we propose an opportunistic transmission scheme with Raptor code for efficient use of the wireless channel. In contrast to the legacy WLAN AP that has a single first-in-first-out (FIFO) queue, the AP in the proposed scheme maintains two separate queues at the AP: one for unicast data and another for multicast data. When the AP accesses a wireless channel, it decides on the type of data (unicast or multicast) and the transmission rate according to the channel condition and the delay boundary of the multicast data. In addition, Raptor code is applied for reliable multicast data transmission. Our simulation results show that the proposed scheme increases the average data rate and energy consumption saving when compared to the auto rate fallback (ARF), receiver-based auto rate (RBAR), and IEEE 802.11aa, schemes, which determine the transmission data rate only by considering the channel condition.

    Original languageEnglish
    Pages (from-to)1091-1098
    Number of pages8
    JournalJournal of Internet Technology
    Volume17
    Issue number6
    DOIs
    Publication statusPublished - 2016

    Keywords

    • IEEE 802.11 WLANs
    • Link adaptation
    • Multicast scheduling
    • Opportunistic transmission
    • Raptor code

    ASJC Scopus subject areas

    • Software
    • Computer Networks and Communications

    Fingerprint

    Dive into the research topics of 'Opportunistic transmission scheme with Raptor code in IEEE 802.11 multirate WLANs'. Together they form a unique fingerprint.

    Cite this