I-D Action:draft-thubert-6lowpan-simple-fragment-recovery-06.txt

Internet-Drafts@ietf.org Tue, 30 June 2009 17:00 UTC

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

	Title           : LoWPAN simple fragment Recovery
	Author(s)       : P. Thubert, J. Hui
	Filename        : draft-thubert-6lowpan-simple-fragment-recovery-06.txt
	Pages           : 14
	Date            : 2009-06-30

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 recover
individual fragments that might be lost over multiple hops between
6LoWPAN endpoints.

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