This memo defines a framework for allowing asynchronous communication
between sleepy sensors mediated by a supporting Proxy node. The
Proxy acts as a store-and-forward agent that handles requests on
behalf of a sleepy client, and buffers responses coming from the
target origin until the requesting client wakes up and get the
computation results.
A new CoAP option, Sleepy, is defined to initiate and control the
asynchronous exchange.
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