CoAP Option Extension: Patience

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Document Type Expired Internet-Draft (individual)
Last updated 2012-08-30 (latest revision 2012-02-27)
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CoAP is a RESTful application protocol for constrained nodes and networks. This specification provides a simple extension for CoAP, the Patience Option. This Option informs a recipient of the preferred time frame for a request or response depending on usage context. In a unicast request, it indicates the patience a client has in waiting for a response. The CoAP server tries to return the response within the specified time frame. In a multicast request, it indicates the patience a server should have in sending its response. The recipient would then try to randomly delay its response within the time frame that the requester indicated. In a CoAP observe notification, it indicates the patience an observer should have in both waiting for a subsequent notification and in re-establishing an observation relation.


Kepeng Li (
Bert Greevenbosch (
Esko Dijk (
Salvatore Loreto (

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