This patch set implements TFRC Faster Restart as per current draft.
Patche can also be found at:
http://wand.net.nz/~iam4/dccp/patches24/
(although do not apply patch 7)
The faster restart implementation was based on
draft-ietf-dccp-tfrc-faster-restart-03.txt.
The version of DCCP CCID3 in Gerrit's tree used as the base is (mostly)
draft-floyd-rfc3448bis-00.txt where the faster restart Internet Draft
specifies the use of draft-ietf-dccp-rfc3448bis-02.txt.
We did not implement all of the Internet Draft for faster restart as it was
either not required, or the base DCCP did not support the features required.
In particular the following features are missing:
* keep alive pings as per section 3.1. It has been proposed at IETF 69 to
remove these.
* the use of X_recv_set as per section 3.2. We use X_recv instead as
X_recv_set is not part of rfc3448bis-00.txt
* Interpolation of X_fast_max as per section 3.2. This is used for idle
periods to scale back the faster restart and is used for idle periods in
minutes. As our tests are shorter than this in duration we have not
implemented. We have however provided the framework for this so it would be
trivial to complete this if desired.
* the measurement of the receive rate in the last RTT as per section 4.2.
We have left our implementation at the receive rate since last feedback sent
for simplicity of implementation. We do not believe that this would have a
material affect, and it would equally affect both the standard implementation
and faster restart so it would be cancelled out.
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