Publish and Monitor Options for CoAP

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Last updated 2012-09-11 (latest revision 2012-03-10)
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This memo defines two additional Options for the Constrained Application Protocol (CoAP) especially targeted at sleepy sensors: Publish and Monitor. The Publish Option enables opportunistic updates of a given resource state, by temporarily delegating the authority of the Publish'ed resource to a Proxy node. The whole process is driven by the (sleepy) origin -- which may actually never need to listen. The Monitor Option complements the typical Observe pattern, enabling the tracking of a resource hosted by a node sleeping most of the time, by taking care of establishing and maintaining an Observe relationship with the (sleepy) origin on behalf of the (sleepy) client.


Thomas Fossati (
Pierpaolo Giacomin (
Salvatore Loreto (

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