An Investigation into Transport Protocols and Data Transport ...

7.3. Summary 144
responsive) flow and hence cause lock-up [FJ92]. It is therefore important
that the unfairness between flows of different end-to-end latencies
is not (much) greater than that of Standard TCP.
Friendliness The phased deployment of New-TCP requires that immediate
performance benefits are achieved, without causing significant performance
penalties for existing Standard TCP flows.
7.3 Summary
A generic framework was presented such that comparative testing of New-
TCP algorithms can be accomplished. The comparative testing of algorithms
is important to understand why each New-TCP algorithm performs better
in each network scenario so that better algorithms can be developed.
The framework consists of a set of metrics such as goodput, convergence
time and fairness which must be applied to a range of network conditions/environments.
Whilst the parameter space for such an analysis is
vast, it is important that such large changes to the TCP congestion control
algorithms should be well understood and potential problems identified prior
to widespread deployment.