[6lowpan] piggybacked fragment ACKs

Richard Kelsey <richard.kelsey@ember.com> Wed, 24 June 2009 20:20 UTC

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Date: Wed, 24 Jun 2009 16:19:11 -0400
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To: pthubert@cisco.com
From: Richard Kelsey <richard.kelsey@ember.com>
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Subject: [6lowpan] piggybacked fragment ACKs
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Pascal,

In the past I have found it very useful to be able to
piggyback ACKs on other traffic.  From reading RFC4944 and
draft-thubert-6lowpan-simple-fragment-recovery-05 it looks
like there should be no problem prepending an RFRAG-ACK
header at the beginning of a LoWPAN datagram, as RFC4944
does with various other headers.  On the other hand, I can't
find anything that explictly allows this.  Do you see any
difficulty with piggybacking RFRAG-ACKs on other packets?

                               -Richard Kelsey