A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Fast-TCP: An enhancement to the current TCP
Author(s) : J. Ma, R. Zhang
Filename : draft-ma-ftcp-00.txt
Pages : 9
Date : 29-Nov-99
Being the widely used transport protocol in Internet, TCP might be
influenced by the congestion occurred in those nodes (i.e., routers,
IP/ATM access nodes, and ATM switches) along the travelling path. Since
TCP relies on the end-to-end window-based mechanism to explain the
congestion, there is limited room for intermediate network elements to
explicitly contribute to the TCP control. However, in huge pipe
networks, TCP might be ineffective because it starts decreasing its rate
just after it senses packet's loss, implying that the network has
already been congested somewhere. A general mechanism of delaying ACKs
in congested nodes is presented in this draft to connect the traffic
control of TCP with that of network elements. This mechanism can be
considered as an enhancement to the currently prevalent TCP and referred
to Fast-TCP. The basic idea of Fast-TCP arises from the fact that
controlling ACK flows can indirectly affect the dynamics of TCP's
behavior. ACK delay mechanism can be easily implemented in various
network nodes where information of link utilization or buffer occupancy
may be employed to notify the congestion. By using ACK delay policy at
IP routers in a complex network, we present the simulation results to
show that this policy achieves good TCP throughput and reduces the
buffer requirement.
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