Project Summary
The IEEE 802.11aa amendment standardised the Group Addressed Transmission Service (GATS), which extends 802.11 WLANs with a novel set of MAC mechanisms to support an effective and efficient multicast video service. The key challenge with GATS is the selection of the best scheme and its configuration for a given network scenario, as the standard does not provide any guidelines nor any assessment of the performance of each mechanism. Although some previous studies have addressed this challenge, their evaluation is either via analysis or simulations under non-realistic assumptions, or based on ``objective metrics'' (e.g., average throughput, losses) instead of subjective quality metrics, which are required for a proper video performance assessment.
We publish in this website the instructions to set up a testbed to run a preliminary implementation of GATS mechanisms on Broadcom wireless cards. We also explain how to stream videos using GATS and how to compare the received copies to the original.
Clink on this link to download the sources and the instructions. To have access to the traces we captured during our experimental evaluation of GATS, please send an email to email address and ask for the traces.