Improving cooperativity in a workflow coordination model over a pub/sub network
UCAmI'12 Proceedings of the 6th international conference on Ubiquitous Computing and Ambient Intelligence
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The Internet of Things enables environments where objects are fully interconnected, allowing the execution of smart services and the consumption of functionalities provided by surrounding Web objects. This loose-coupled object interconnection demands improvements in the control plane for an optimum coordination between distributed services in mobile devices. There are several coordination challenges in these environments, related to the interaction between services, the communication channels establishment across service fragments and the transmission of events at runtime. This paper defines a coordination model and proposes solutions to these challenges by developing a cooperative service execution model for mobile environments, using the publish-subscribe paradigm for communicating control events. Subsequently, we evaluate this model and analyze the improvements of the designed optimization mechanisms over the MQTT protocol and the NS-3 simulator.