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Subject: [OASIS Issue Tracker] (MQTT-600) A Gateway should buffer Q0S 0 messages for ASLEEP clients
Davide Lenzarini created MQTT-600: ------------------------------------- Summary: A Gateway should buffer Q0S 0 messages for ASLEEP clients Key: MQTT-600 URL: https://issues.oasis-open.org/browse/MQTT-600 Project: OASIS Message Queuing Telemetry Transport (MQTT) TC Issue Type: Improvement Reporter: Davide Lenzarini Chapter 3.19 (Sleeping clients) of WD24 _During the asleep state, packets that need to be sent to the client are buffered at the server/gateway. The gateway MUST buffer application messages of quality-of-service 1 & 2._ _Non-normative comment_ _The gateway may choose to buffer messages of all quality-of-service 0, whilst the client is sleeping and is within it's session expiry interval._ Â I propose to modify the above in _During the asleep state, packets that need to be sent to the client are buffered at the server/gateway. The gateway MUST buffer application messages of quality-of-service 1 & 2 *{color:#FF0000}& 0{color}*._ -_Non-normative comment_- -_The gateway may choose to buffer messages of all quality-of-service 0, whilst the client is sleeping and is within it's session expiry interval._- Â With this modification the following scenario is possible:ÂÂ # A client CONNECT to a gateway (client enrollment) with a very long session expiry interval # The client subscribe to a certain topic to receive pending messages as soon as it sends a publish-1 message to a certain (also different) topic # The client DISCONNECTÂwith a very long session expiry interval # After some time the client send a PUBLISH-1 message and would like to receive (like with the PINGREQ when in ASLEEP state) all pending messages on the topic it has subscribed to, also with QoS 0 (the most efficient as they don't require any acknowledge) -- This message was sent by Atlassian Jira (v8.3.3#803004)
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