Subject: [tsvwg] FW: I-D Action: draft-li-tsvwg-loops-problem-opportunities-01.txt

From: Liyizhou <[email-masked]>
Date: Tue, 12 Mar 2019 11:24:53 +0000

Hi,

This draft (LOOPS) is to replace draft-li-tsvwg-overlayed-path-segment-fwding as its previous abbrev was confusing. The text was revised quite significantly based on some offline discussion.

In the usage scenario of overlay WAN path built by cloud based nodes, LOOPS can be used to achieve more efficient loss recovery and less performance degradation caused by loss. 
Local in-network recovery (i.e. between two overlay nodes) is a main element of LOOPS.  Time based measurement over an overlay segment helps determine if a packet was lost due to congestion and whether it should be recovered locally. Such information can further be relayed (possibly using ECN) to end-to-end congestion control loop to make the end host sender react in a way that unnecessary sending rate reduction can be minimized.  

We would like to make the group aware about the revision of the document. Thank you.

Rgds,
Yizhou

-----Original Message-----
From: I-D-Announce [mailto:[email-masked]] On Behalf Of [email-masked]
Sent: Monday, March 11, 2019 5:27 PM
To: [email-masked]
Subject: I-D Action: draft-li-tsvwg-loops-problem-opportunities-01.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.

        Title           : LOOPS (Localized Optimization of Path Segments) Problem Statement and Opportunities
        Authors         : Yizhou Li
                          Xingwang Zhou
	Filename        : draft-li-tsvwg-loops-problem-opportunities-01.txt
	Pages           : 18
	Date            : 2019-03-11

Abstract:
   Various overlay tunnels are used in networks including WAN,
   enterprise campus and others.  End to end paths are partitioned into
   multiple segments using overlay tunnels to achieve better path
   selection, lower latency and so on.  Traditional end-to-end transport
   layers respond to packet loss slowly especially in long-haul
   networks: They either wait for some signal from the receiver to
   indicate a loss and then retransmit from the sender or rely on
   sender's timeout which is often quite long.

   LOOPS (Localized Optimization of Path Segments) attempts to provide
   non end-to-end local based in-network recovery to achieve better data
   delivery by making packet loss recovery faster.  In an overlay
   network scenario, LOOPS can be performed over the existing, or
   purposely created, overlay tunnel based path segments.

   This document illustrates the slow packet loss recovery problems
   LOOPS tries to solve in some use cases and analyzes the impacts when
   local in-network recovery is employed as a LOOPS mechanism.

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-li-tsvwg-loops-problem-opportunities/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-li-tsvwg-loops-problem-opportunities-01
https://datatracker.ietf.org/doc/html/draft-li-tsvwg-loops-problem-opportunities-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-li-tsvwg-loops-problem-opportunities-01

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.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

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