Page Comparison

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\uD83D\uDC65 Participants

ET-W2AT

No	Name	Role	Present (yes/no)
1	Mr Jeremy TANDY	Chair	No
2	Mr Rémy GIRAUD	Member	Yes
3	Mr Pablo Jose LOYBER	Member	No
4	Ms FATIMA SABAI	Member	No
5	Mr Peng WANG	Member	Yes
6	Mr Tom KRALIDIS	Member	No
7	Mr Kenji TSUNODA	Member	No
8	Dr Baudouin RAOULT	Member	No
9	Mr Thorsten BÜSSELBERG	Member	No
10	Ms Dana OSTRENGA	Member	No

Experts

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Item	Item	Presenter	Notes
0	Opening	Rémy	Rémy introduces the participants and

Andre

André Fatton from VerneMQ.

ET-W2AT discusses pub/sub,

hiearchary

hierarchy and notification message format.

Few parameters Using standards, to describe

But we haven’t discussed the MQTT parameters for further implementation of standards as baselines

. MQTT parameters

. Recording of today’s meeting will be shared with ET-W2AT members.
1	Presentation on advanced MQTT features

Andre

André Fatton, VerneMQ

André introduces

Discussions:

(Kai) any nodes need to subscribe to at least 2 brokers for redundancy. Question: connection failures,

share data over protocol, retain

retained message?
- (Andre) Retained message / offline messages, persistent sessions. For offline messages, persistent session is needed. Offline for one hour, estimate the volume of the messages that were missed. For the broker administrator, when all subscribers go offline

,

, queue size limit

- . If the time window is too big, no broker can do this part. MQTT is different from database.
(Rémy) shares the flow of messages in WIS2 to alert a WIS users of data availability.
Persistent sessions
(Hassan) WIS2 users and messages with different priorities, QoS for user/message priorities settings?
- (Andre) Publishers will set their QoS = 1 or 2 on their own.
- (Rémy) no necessary to prioritize at message level. Challenge is more on subscriber side.
- (Kai) It is more on dowloading side, for large volume, it is important to download by priority.
- (Andre) Queue Priority no needed for MQTT specification.
(Rémy) Next step is to write MQTT parameters specification in one or two pages
(Hassan) MQTT Security?
- (Andre) MQTT is secure by utilizing measure in the form of in the form ofMQTT level username, password, and an access control list (ACL)

to share with recordings with the ET-W2AT members to review the presentation by André Fatton
to write an guide for the MQTT parameters in one or two pages

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