Technical Summary
This draft defines the way SCHC header compression can be applied to
CoAP headers. The CoAP header structure differs from IPv6 and UDP
protocols since CoAP uses a flexible header with a variable number of
options, themselves of variable length. The CoAP protocol is
asymmetric in its message format: the format of the packet header in
the request messages is different from that in the response messages.
Working Group Summary
The draft does not introduce new methods as the original SCHC does.
This made the work much easier for the WG. On the other hand, the
draft specifies how the existing SCHC mechanisms are to be used
for a number of usual fields. The limit of the work is that the
group could not try every possible CoAP variations and there may
be cases where SCHC as it stands today is suboptimal. The group
decided to ship as is, and possibly publish a refresher when more
experience is gained.
Document Quality
This draft is implemented by at least one vendor, Acklio.
There is also an openSCHC implementation in python.
Personnel
The Document Shepherd is Pascal Thubert. The Responsible Area Director is Éric Vyncke.