What is RTT?
What is this map?
- RTT stands for Round Trip Time. It is the total time taken between sending a request packet
to the server and receiving a reply packet from the server.
What is the measurement
- This map shows the "cellular" latency data, i.e.
Round Trip Times (RTTs) collected from cellular users across the world
using our network measurement server.
- We have setup a measurement server at Madison - Wisconsin,
United States to perform the network measurements used to generate this
data. The server is used to measure the network latency (Round Trip
Times) over UDP from cellular users as shown in the figure.
What is a good RTT?
- This network latency data has been collected by
from from thousands of cellular based mobile users from
across the world . This data has been used to generate this map.
- Since the measurement server is located in the US, the RTTs
are higher for other countries. So, the absolute RTT values are not
useful outside the United States. The right way to interpret the map is
to look at the RTTs in your region and compare the RTTs from neighbouring regions
If the median RTT observed at a location in downtown Chicago is 180ms but if
it is 300ms in a nearby suburb, then the location in downtown Chicago is experiencing better cellular performance (in terms of RTT)
than the suburb in Chicago.