Publication Type
Magazine Article
Version
acceptedVersion
Publication Date
7-2009
Abstract
Wireless multicast is an important service primitive for emerging applications such as live video, streaming audio and content telecasts. Transmission rate in such a link layer multicast is bottlenecked by the rate of the weakest client, leading to channel under-utilization. Attempts to increase the data rate results in lower reliability (due to higher bit error rate) and higher unfairness. This poster utilizes smart beamforming antennas to improve multicast performance in wireless LANs. The main idea is to satisfy majority of the (strong) clients with a high-rate omnidirectional transmission, followed by high-rate directional transmission(s) to cover the weaker ones. By selecting an optimal transmission strategy, we show that the multicast throughput can be maximized while achieving a desired delivery ratio at all the clients. We use testbed measurements to verify our main assumptions. We simulate our protocol in Qualnet, and observe consistent performance improvements over a wide range of client topologies and time-varying channel conditions.
Discipline
Computer Sciences | Software Engineering
Research Areas
Software and Cyber-Physical Systems
Publication
ACM SIGMOBILE Mobile Computing and Communications Review
Volume
13
Issue
3
First Page
34
Last Page
37
ISSN
1559-1662
Identifier
10.1145/1710130.1710137
Publisher
ACM
Citation
Souvik SEN; GHOSH, Rahul; XIONG, Jie; and CHOUDHURY, Romit Roy.
Poster abstract: BeamCast: Harnessing beamforming capabilities for link layer multicast. (2009). ACM SIGMOBILE Mobile Computing and Communications Review. 13, (3), 34-37.
Available at: https://ink.library.smu.edu.sg/sis_research/2809
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Additional URL
http://doi.org/10.1145/1710130.1710137