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Practical Rate-Adaptive Multicast Schemes for Multimedia over IEEE 802.11 WLANs

Thierry Turletti 1 Yongho Seok 1
1 PLANETE - Protocols and applications for the Internet
Inria Grenoble - Rhône-Alpes, CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : The current IEEE 802.11 standard does not address the basic requirements of multicast communication. More specifically, multicast packets are sent in an open-loop fashion as broadcast packets i.e. without any acknowledgements. This basic multicast transmission mechanism prevents the implementation of congestion control, transmission reliability and physical data rate adaptation algorithms. In this paper, we propose new mechanisms based on the leader-based approach to enhance the legacy multicast transmission scheme in WLANs. We focus on practical solutions that can be deployed in current and future WiFi devices and are compatible with legacy 802.11 devices. We propose two mechanisms to adapt the PHY data rate of multicast flows: the simplest leader-based mechanism (LB-ARF) and the Robust-Rate Adaptive Mechanism (RRAM) . Our simulations show that for static environments, LB-ARF and RRAM can achieve high multicast throughput and fairness between the set of multicast receivers. LB-ARF is sufficient to outperform the legacy multicast mechanism when the stations are fixed. RRAM improves the reliability of the multicast transmission and obtains high throughput independently of the number of receivers and the maximal speed of stations.
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Submitted on : Thursday, October 12, 2006 - 1:49:21 PM
Last modification on : Friday, February 4, 2022 - 3:09:28 AM
Long-term archiving on: : Monday, September 20, 2010 - 4:29:53 PM




Thierry Turletti, Yongho Seok. Practical Rate-Adaptive Multicast Schemes for Multimedia over IEEE 802.11 WLANs. [Research Report] RR-5993, INRIA. 2006, pp.23. ⟨inria-00104699v2⟩



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