MQTT-SN SC Meeting

This meeting is scheduled for 16:00 BST, which is UTC+1. There is currently no option in the OASIS systems to select BST

Agenda:

• Roll call

• Approve agenda

• Approve minutes from last meeting - https://groups.oasis-open.org/higherlogic/ws/public/document?document_id=72731&wg_id=3d1c9127-09c1-4b2e-8801-018dc7d3f558

• Voting rights update

• Working draft updates done:

  • Changed Retain Registrations flag to Retain Topic Aliases in SLEEPREQ

  • Changed Session Id back to Client Id in PINGREQ

    • added optional Client Id to SLEEPREQ

  • Rewrote 4.7.2 Topic Aliases

    • Client/Gateway Publish procedure items not duplicated moved elsewhere

    • Client Topic Un/subscribe procedure items moved elsewhere, or deleted if duplicated

  • Informative sections moved to Appendices:

    • Server Congestion

    • Timer and Counter Values

    • Exponential Backoff

  • Client States section edited and redrafted, with some subsections subsumed into existing sections elsewhere:

    • Clean Start (inherited from 1.2)

    • Keep Alive (inherited from 1.2)

    • Client Disconnect (inherited from 1.2)

  • Redrafted C.2 Gateway Advertisement and Discovery

• Issues/questions:

  • https://issues.oasis-open.org/browse/MQTT-648 : is CONNECT in Asleep or Awake full-featured?

  • https://issues.oasis-open.org/browse/MQTT-649 – Gateway receiving a different Client Id in PINGREQ when sleeping

  • https://issues.oasis-open.org/browse/MQTT-645 – should we have Server Keep Alive on the CONNACK and limit sending PINGREQs to client only (as is done in MQTT 5)

  • https://issues.oasis-open.org/browse/MQTT-650 – client Topic Alias definitions?

  • https://issues.oasis-open.org/browse/MQTT-651 – inflight window of 1 is inefficient

• Working draft todo:

  • request template for implementation guide

  • https://issues.oasis-open.org/browse/MQTT-647 – what is the exact meaning of radius?

  • Section 3.9.3 - Can we provide an example on how to associate a PUBLISH received by a GW with a session handled by the same GW?

  • update QoS2 descriptions and diagrams to match consensus

  • review and update entire draft for use of Packet and Application, Will and Retained Message terms

  • Remove comparative references to MQTT

  • be specific about DUP flag use

  • decide what contents we want for Appendix D – Revision History

  • gather conformance statements and compete Appendix B

• AOB

• Confirm time and date of next meeting

• Check for late arrivals