Section: New Results

Locating Throughput Bottlenecks in Home Networks

Participants: Srikanth Sundaresan (ICSI), Nick Feamster (Princeton), Renata Teixeira

We developed WTF (Where's The Fault?) [4] , a system that localizes performance problems in home and access networks. We implement WTF as custom firmware that runs in an off-the-shelf home router. WTF uses timing and buffering information from passively monitored traffic at home routers to detect both access link and wireless network bottlenecks. The Federal Communication Commission (FCC) in the United States deployed WTF in 3000 homes for a few days in November 2014. We are currently analyzing the resulting dataset to help shed light on common pathologies that occur in home networks.