Message Queuing Telemetry Transport (MQTT) is one of the standard application layer protocols for Internet Things. It uses a publish/subscribe mechanism which organizes set clients around server called broker, delivers published data to its intended recipients. This article proposes an architecture that allows MQTT brokers cooperate and share their with other interested brokers. service-oriente...

In recent years, numerous new approaches that rely on data-intensive methods have been developed for maritime assistance systems, leading to a compelling need more elaborate verification and validation procedures. Modern testbeds can meet these demands are often separately from the system itself provided as generically usable services. However, joint usage of such by multiple stakeholders resea...