  The congestion control algorithm bring such importance that it avoids the
network link into severe congestion and guarantees network normal operation.
Since The loss based algorithms introduce high transmission delay, to design
new algorithm simultaneously achieving high throughout and low buffer
occupation is a new working direction. The bottleneck bandwidth and round trip
time (BBR) belongs such kind, and it has drawn much attention since its
release. There are other algorithms modified from BBR to gain better
performance. And the implementation of BBR v2.0 is released recently. We
implement a framework to compare the performance of these algorithms in
simulated environment.
