Paper review : Congestion Avoidance and Control (Jac88)
Reviewer : Hai Fang (email@example.com)
To implement congestion avoidance and control for TCP.
The authors investigate the transport protocol implementations, analysis the
reasons of why packet conservation may fail, and propose several algorithms
for 4BSD TCP, which was originally mis-behaving and is tuned to work better
under abysmal network conditions.
- Main ideas
- Much of the cause of the congestion problems lies in transport protocol
implementations instead of the protocols themselves.
- 4.3BSD TCP was mis-behaving and it could be tuned to work better when
a group of algorithms applied.
- Significance rating: 4
This is the first attempt on implementing congestion avoidance and
control for TCP. The authors also provide different algorithms to tackle
different problems. (4)
- Convincing rating
The authors investigate the deficit of the primitive implementation of the
TCP protocols, design several algorithms to tackle the different failures
of packet conservation, analysis the results mathematically, and provide the
data of the experiments to show the good performance of the algorithms on
dealing with congested conditions on the Internet.
As the authors mentioned, the paper only provides the solutions on the
transport endpoints, whereas the gateway side of congestion control was left
for future investigation. Moreover, congestion detection is another important
problem besides congestion avoidance and control.
Protocols themselves cannot always avoid network congestion problems, the
investigations of the implementation aspect can generate algorithms that
improve the performance of network traffic greatly.