Hi Cao, On 07/04/2014 01:30 PM, Cao, Zhen (CZ) wrote: > At least for example, using of send-only model for sleeping nodes to > save energy. Need of eliminating the role or acting as a COAP server > or Waiting for COAP observation subscriptions.
I think that this issue could be described independent of any radio technology. At least right now there is nothing in there that makes it radio technology specific. I have just submitted an updated version of the IAB Smart Object Architecture document and included a section on design patterns (see Section 2 of http://www.ietf.org/internet-drafts/draft-iab-smart-object-architecture-04.txt). I am convinced that we need to have stories about the standards we believe should be used in each of these scenarios. Even for the simplest scenario (device-to-cloud) we do not yet have a complete story. If we could produce documents that specifically refer to these scenarios and discuss a specific concern (such as security or energy efficiency) that might get us somewhere. For DTLS-based security that's what I am trying to do, as mentioned at the last IETF meeting. I am not yet there since I am still getting the "paper-work" done in with the DTLS profile document in the DICE working group. Note also that the DTLS profile draft only focuses on the device-to-cloud use case - nothing else (and that's already complex enough). Ciao Hannes
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