An Investigation into Transport Protocols and Data Transport ...

10.2. New-TCP Suitability Study 248
to this.
• The slow convergence due to aggressive α and β parameters will lead
to long periods of transient unfairness between competing flows. This
was especially evident with ScalableTCP.
• The delay based congestion control approach of FAST has several benefits,
most notably very good friendliness and high performance. However,
it also suffers from the need for network queue provisions to be
suitably high for efficient performance.
• Under the assumption that all traffic flows are long lived bulk transport,
all New-TCP algorithms impose a specific cost to existing network
traffic which can be lowered with network aid such as Quality of Service
using DiffServ or Dedicated Circuits. Also the goodput performance of
New-TCP flows can be enhanced by offering higher levels of protection
against network congestion.
10.2 New-TCP Suitability Study
Table 2.2 in Chapter 2 shows four different application areas for the role of
transport on the LHC. In this section, each application area will be discussed
in turn with regards to the metrics and performance analysis from Chapter 8
and Chapter 9.
10.2.1 Area 1
The requirement for transport over the Internet requires backwards compatibility
with existing Internet traffic flows. However, due to the necessity to get