A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : TCP Parameter Dynamic Control
Authors : Monia Ghobadi
Haibin Song
Rachel Huang
Yashar Ganjali
Filename : draft-song-dclc-tcpdc-04.txt
Pages : 14
Date : 2014-10-27
Abstract:
Congestion control has been extensively studied for many years.
Today, the Transmission Control Protocol (TCP) is used in a wide
range of networks (LAN, WAN, data center, campus network, enterprise
network, etc.) as the de facto congestion control mechanism. Despite
its common usage, TCP operates in these networks with little
knowledge of the underlying network or traffic characteristics. As a
result, it is deemed to continuously increase or decrease its
congestion window size in order to handle changes in the network or
traffic conditions. Thus, TCP frequently overshoots or undershoots
the ideal rate making it a "Jack of all trades, master of none"
congestion control protocol. In light of the emerging popularity of
centrally controlled networks such as Software-Defined Networks
(SDNs), we propose a framework that takes advantage of the
information available at the central controller to improve TCP.
Specifically, in this document, we propose OpenTCP as a dynamic and
programmable TCP adaptation framework for centrally controlled
networks. OpenTCP gathers global information about the status of the
network and traffic conditions through the centralized controller,
and uses this information to adapt TCP. OpenTCP periodically sends
updates to end-hosts which, in turn, update their behaviour using a
simple kernel module.
This document describes a framework and message flows for centralized
congestion control parameter adaptation based on congestion control
policies and network status measurements, so that each end host in a
network can make better use of the network resource according to the
available resources. In the rest of this document we use TCP as a
standard congestion control mechanism, but the same idea can be
applied to other congestion control protocols as well. A TCP
Optimization Element and a TCP Optimization Agent are introduced. The
message patterns include request response and
subscription/notification. This mechanism can be used in network
service providers' networks, as well as in data center networks.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-song-dclc-tcpdc/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-song-dclc-tcpdc-04
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-song-dclc-tcpdc-04
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
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ftp://ftp.ietf.org/internet-drafts/
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