A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : LLN Fragment Forwarding and Recovery
Author(s) : Pascal Thubert
Jonathan W. Hui
Filename : draft-thubert-roll-forwarding-frags-01.txt
Pages : 16
Date : 2013-02-25
Abstract:
In order to be routed, a fragmented packet must be reassembled at
every hop of a multihop link where lower layer fragmentation occurs.
Considering that the IPv6 minimum MTU is 1280 bytes and that an an
802.15.4 frame can have a payload limited to 74 bytes in the worst
case, a packet might end up fragmented into as many as 18 fragments
at the 6LoWPAN shim layer. If a single one of those fragments is
lost in transmission, all fragments must be resent, further
contributing to the congestion that might have caused the initial
packet loss. This draft introduces a simple protocol to forward and
recover individual fragments that might be lost over multiple hops
between 6LoWPAN endpoints.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-thubert-roll-forwarding-frags
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-thubert-roll-forwarding-frags-01
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-thubert-roll-forwarding-frags-01
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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