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Subject: [OASIS Issue Tracker] (MQTT-250) Merge the MQTT 3.1.1 and MQTT-SN 1.2 specifications

    [ https://issues.oasis-open.org/browse/MQTT-250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=58950#comment-58950 ] 

Richard Coppen commented on MQTT-250:

Reviewed on TC call 12.02.2015 

> Merge the MQTT 3.1.1 and MQTT-SN 1.2 specifications
> ---------------------------------------------------
>                 Key: MQTT-250
>                 URL: https://issues.oasis-open.org/browse/MQTT-250
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Improvement
>          Components: futures
>            Reporter: Allan Stockdill-Mander 
> Many features that have been discussed as desirable in MQTT, or assist with its mission to be a lightweight pub/sub messaging transport are available in MQTT-SN, along with it being a binding of a very similar protocol to MQTT on a connectionless transport.
> MQTT-SN provides the following on top of standard MQTT features;
> Negative ACKs on publishes and subscribes
> Server initiated pings
> Server initiated disconnects
> Ability to update will message data at any point
> Topic Registration saves space when sending/receiving on the same topic and allows subscription identification of non wildcard subs.
> Will as part of session data
> Client controlled timed expiry of session data
> (along with other features specifically aimed at sensor networks)
> A lot of the above are compelling for the current implementation of MQTT over a connected transport, and essential if MQTT is looking to extend its usefulness in mesh/sensor networks.

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