1. Residential Internet Performance: A view from the Gateway
Renata Teixeira (Inria Paris)
with
Srikanth Sundaresan (ICSI), Nick Feamster (Princeton)
Anna-Kaisa Pietilainen, Michele Pittoni (Inria Paris)

2. Possible measurements points in the home
Internet
End-devices
Observe poor user experience
But, have limited view of the home network and portability is an issue
Home gateway
Ideally placed between home devices and Internet, always on
But, have limited resources and deployment is harder

3. Gateway deployments Breadth: The FCC/SamKnows study
Last Mile
Internet
SamKnows/BISmark
Nearby Server
Breadth: The FCC/SamKnows study
7,800 gateways, 18 ISPs, multiple service plans
Depth: The BISmark study
120+ gateways in 28 countries worldwide, periodic and on-demand measurements

4. Interpreting throughput results

5. Short-term throughput different from sustainable throughput

6. Are downstream throughput bottlenecks in the ISP or the home wireless network?
User’s traffic
Internet
Home or Access (HoA) algorithm
Inspect packets traversing gateway
Packet inter-arrival time to detect access bottlenecks
RTT in home wireless to detect wireless bottlenecks

7. Prevalence of last-mile bottlenecks (2,652 homes in FCC, Nov 2014)
Access link
Wireless
with last-mile bottlenecks
Fraction of tests
Downstream access capacity bins (Mbps)

8. Challenges for data visualization and aggregation
A single metric of throughput may not be sufficient
Short-term versus sustained throughput
Consistency of throughput over time
Can we identify bottlenecks?
Multiple bottlenecks possible
Home network, server, user’s device
Select tests when access link is bottleneck
Can we compare results of different tools?
What is the type of vantage point?
How many vantage points per region?
Which metric is being measured?
Can we compare measurements at coarse grain?