CoAP Protocol Negotiation

Document Type Expired Internet-Draft (individual)
Authors Bill Silverajan  , Mert Ocak 
Last updated 2019-01-03 (latest revision 2018-07-02)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


CoAP has been standardised as an application-level REST-based protocol. When multiple transport protocols exist for exchanging CoAP resource representations, this document introduces a way forward for CoAP endpoints as well as intermediaries to agree upon alternate transport and protocol configurations as well as URIs for CoAP messaging. Several mechanisms are proposed: Extending the CoRE Resource Directory with new parameter types, introducing a new CoAP Option with which clients can interact directly with servers without needing the Resource Directory, and finally a new CoRE Link Attribute allowing exposing alternate locations on a per-resource basis.


Bill Silverajan (
Mert Ocak (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)