We have a few questions regarding the MMSys’21 challenge on “Bandwidth Estimation for Real-Time Communications” -
Q1. AlphaRTC Bandwidth Estimator (Input Data):
Is there a documentation that lists the data points available to the bandwidth estimator and how to retrieve them? The challenge is about the sending traffic, so we are expected to estimate the sending (upload) bandwidth. Should we assume the download speed is never an issue?
Q2. AlphaRTC Bandwidth Estimator (Relation to Congestion Control):
The challenge description says that the output of the bandwidth estimator is the bitrate value fed to the codec for encoding purposes. We are not concerned with the packet-level sending strategy, right (it is taken care of automatically by the GCC which we should not modify at all)?
Q3. Test Scenarios:
Is there more information on the test scenarios/ test cases? E.g., what is the max number of instances in each test case? How will the instances be connecting to each other? If it is two clients talking to each other, they will have a direct connection but if there are more than two, they will likely go through a server (forwarding the copy to each other client). Are we concerned about only the upload (sending) bandwidth of the active client (to the forwarding unit) and not the download speeds of the non-active clients?
Actually, the nodes are located in real networks. Hence, we will have cross-traffic at least by others.
We may also test the BWE in cross-traffic intentionally.
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It is in our repo.
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For more traces, we will keep you updated.
We created a slack channel for this challenge. If you want to participant this challenge, could you join our Slack channel (https://join.slack.com/t/opennetlab-challenge/shared_invite/zt-pjn74xhx-d~jG5lY3s4_6kSJHuzfHcw)?