Allways-online Requirement for Sleeping CoAP Node

Document Type Expired Internet-Draft (individual)
Author Zehn Cao 
Last updated 2011-07-04
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


CoAP is to enable a concept of web of sensors, but there are many cases that the sensors are not always online and hence the requests from the web client cannot reach them in timely manner. This document analyzes this problem and describes the requirements for a CoAP enabled sensor to behave always online.


Zehn Cao (

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