CausalSim: Toward A Causal Data-Driven Simulator For Network Protocols

Evaluating the real-world performance of network protocols is challenging. Randomized control trials (RCT) are expensive and inaccessible to most researchers, while expert-designed simulators fail to capture complex behaviors in real networks. We present CausalSim, a data-driven simulator for network protocols that addresses this challenge. Learning network behavior from observational data is complicated due to the bias introduced by the protocols used during data collection. CausalSim uses traces from an initial RCT under a set of protocols to learn a causal network model, effectively removing the biases present in the data. Using this model, CausalSim can then simulate any protocol over the same traces (i.e., for counterfactual predictions). Key to CausalSim is the novel use of adversarial neural network training that exploits distributional invariances that are present due to the training data coming from an RCT. Our extensive evaluation of CausalSim on both real and synthetic datasets and two use cases, including more than nine months of real data from the Puffer video streaming system, shows that it provides accurate counterfactual predictions, reducing prediction error by 44% and 53% on average compared to expert-designed and standard supervised learning baselines.

Name thesis:degree_name

Master

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2022

Author dc:creator

• Nasr-Esfahany, Arash

Advisor dc:contributor.advisor

• Alizadeh, Mohammad

Statement dc:rights

• In Copyright - Educational Use Permitted
• Copyright MIT

Licence dc:rights.uri

• http://rightsstatements.org/page/InC-EDU/1.0/

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/143352

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/143352