EMMA: Distributed QoS-Aware MQTT Middleware for Edge Computing Applications
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The document presents 'emma', a decentralized MQTT middleware designed for edge computing applications, focusing on reducing latency and integrating with IoT infrastructure. It describes the middleware's architecture, features such as QoS optimization, and capability to handle mobile and volatile resources. Additionally, the document highlights its goals, evaluation results, and related state-of-the-art research.
EMMA: Distributed QoS-Aware MQTT Middleware for Edge Computing Applications
- 1. EMMA Distributed QoS-Aware MQTT Middleware for Edge Computing Applications Thomas Rausch, Stefan Nastic, Schahram Dustdar TU Wien Distributed Systems Group http://dsg.tuwien.ac.at
- 2. 2 AWS IoT
- 3. 3 Subscribe to topic: /robot/arm Publish “move x,y,z” to /robot/arm Decoupled messaging
- 5. 5 Edge-Enabled MOM Data centers Internet Mobile edge Extreme edge IoT Cloudlets Message broker Cloud-based MOM Edge-enabled MOM Scale Proximity & Responsiveness
- 6. 6 ▪ Popular platform for IoT – ISO standardized pub/sub protocol – Low-bandwidth design ▪ Simple Protocol – CONNACK – SUBSCRIBE(t), SUBACK(t) – PUBLISH(t, msg) – ...
- 7. 7 Static MQTT Topic Bridging Local Broker Central Broker Internal Topics Static config Static config Cloud M. Garcia, “How to Bridge Mosquitto MQTT Broker to AWS IoT” The Internet of Things on AWS -- Official Blog, 2016. https://aws.amazon.com/blogs/iot/how-to-bridge-mosquitto-mqtt-broker-to-aws-iot/ Edge Topic Bridge
- 8. 8 Goals ▪ Decentralized messaging middleware ▪ Leverages edge resources to reduce latency ▪ Can handle mobile clients ▪ Can handle volatile resources ▪ Seamlessly integrates with IoT infrastructure
- 9. 9 EMMA MQTT Middleware Client GW c GW c Broker Broker Device Monitoringprotocol Controller Bridging Tables Gateway Bridging Table Reconfigura- tion Engine REST Endpoints Network monitor Buffer out Buffer in MQTT Server Discovery Service https://git.dsg.tuwien.ac.at/emma/emma
- 10. 10 QoS Optimization & Balancing 0-2 ms 2-5 5-10 PINGREQ PINGRESP Broker Gateway▪ Continuously monitor network QoS via simple UDP protocol ▪ For each client create latency group to brokers ▪ Connect gateways to a broker in closest group ▪ Balance load between brokers in same group
- 12. 12 Evaluation us-east eu-west eu-central BrokerGateway BrokerGateway Controller ... ... Gateway Broker 98 ms 27 ms 85 ms https://git.dsg.tuwien.ac.at/emma/pubsub-benchmark
- 14. 14 Controller <1 ms 98 ms 27 ms 85 ms
- 15. 15 Controller
- 16. 16 Controller
- 17. 17 Controller
- 18. 18 Controller
- 19. 19 Controller
- 20. 20 Controller
- 21. 21 Controller
- 22. 22 Message Loss ▪ Caused by subscriber mobility ▪ Guaranteed message delivery requires transactional reconnection
- 23. 23 More Results in the Paper 71 2 3 4 5 6 8
- 24. 24 Dipl.-Ing. (MSc) Thomas Rausch Research Assistant TU Wien Distributed Systems Group Argentinierstraße 8/194-02, 1040, Vienna, Austria T: +43 1 58801 184 838 E: [email protected] dsg.tuwien.ac.at/staff/trausch QoS Monitoring & Reconfiguration
- 25. 25 Related Work – P2P Pub/Sub NCA’05 DEBS’05 MW’05 PODC’07
- 26. 26 State of the Art – Research
- 27. 27 State of the Art – The Real World ScalAgent. JoramMQ, a distributed MQTT broker for the Internet of Things. White paper. 2014.