Reliable Multicast in Multi-Access Wireless LANs
Wireless Networks
Fixing 802.11 access point selection
ACM SIGCOMM Computer Communication Review
Multicast in 802.11 WLANs: an experimental study
Proceedings of the 9th ACM international symposium on Modeling analysis and simulation of wireless and mobile systems
A first look at modern enterprise traffic
IMC '05 Proceedings of the 5th ACM SIGCOMM conference on Internet Measurement
Fairness and load balancing in wireless LANs using association control
IEEE/ACM Transactions on Networking (TON)
An optimal station association policy for multi-rate ieee 802.11 wireless lans
Proceedings of the 10th ACM Symposium on Modeling, analysis, and simulation of wireless and mobile systems
Efficient multicasting over large-scale WLANs through controlled association
Computer Networks: The International Journal of Computer and Telecommunications Networking
High throughput MAC layer multicasting over time-varying channels
Computer Communications
CENTAUR: realizing the full potential of centralized wlans through a hybrid data path
Proceedings of the 15th annual international conference on Mobile computing and networking
Opportunistic use of client repeaters to improve performance of WLANs
IEEE/ACM Transactions on Networking (TON)
Supporting MAC layer multicast in IEEE 802.11n: issues and solutions
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Dynamic rate and FEC adaptation for video multicast in multi-rate wireless networks
Mobile Networks and Applications
A novel multicasting scheme over wireless LAN systems by using relay
EUC'06 Proceedings of the 2006 international conference on Emerging Directions in Embedded and Ubiquitous Computing
Dynamic load balancing through association control of mobile users in WiFi networks
IEEE Transactions on Consumer Electronics
Layered Wireless Video Multicast Using Relays
IEEE Transactions on Circuits and Systems for Video Technology
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Multicast is a fundamental communication service in Wireless Local Area Networks (WLANs). Unfortunately, multicast packets are transmitted at the base rate needlessly, which prevents rich multimedia contents from being delivered to users. To this end, a number of prior studies have proposed to increase multicast capacity whereby an Access Point (AP) transmits at the highest data rate that can be decoded by all subscribers. Another approach is by controlling subscriber-AP associations such that a given objective, e.g., AP load, is met. Moreover, they have also proposed using relays to help boost stations with weak channel condition. In this paper, we propose an approach that exploits association control, high number of APs and relays simultaneously to improve the performance of multicast in WLANs. We show that the problem is NP-hard by reducing it from the Maximum Coverage with Group Budget (MCG) problem. We then propose a number of heuristics that consider two types of relays: non-subscribers and subscribers. The former are stations that are not part of any multicast groups whereas the latter comprise of stations that are actively receiving multicast packets. Our extensive simulation studies with varying APs, station numbers, and multicast transmission rates show the efficacy of our heuristics in reducing the average and maximum AP load, and are able to support a higher number of users at high multicast rates. Specifically, they result in up to 83% reduction in AP load, and support up to 17% and 53% more users in low and high rate multicast scenarios respectively.