An Investigation into Transport Protocols and Data Transport ...

9.3. Internet Transfers 242
10 1
Stability
10 0
Standard TCP HSTCP ScalableTCP HTCP FAST BicTCP
New−TCP
Figure 9.38: Stability from CERN to RAL.
Fraction Bytes Retransmitted per Mbit/sec
10 −4
10 −6
10 −8
10 −10
10 −12
Standard TCP HSTCP ScalableTCP HTCP FAST BicTCP
New−TCP
Figure 9.39: Overhead from CERN to RAL.
Overhead
In terms of overhead, all of the New-TCP flows show similar distributions to
that of Standard TCP - except for FAST which again maintains a narrow
distribution with the highest overhead. This is shown in Figure 9.39. One
could argue that H-TCP has the best (i.e. lowest) overhead. However, the
notches indicate that the large 95 percentile range between all algorithms
overlap.
9.3.6 Summary
Whilst the included network paths are in no way indicative of the typical
network topology and network load, they offer an indication of the expected