A New Event Model for Event Notification Services Applied to Transport Services in Smart Cities

Event Notification Services (ENS) have an important role in the current context of Smart Cities. The publish-subscribe paradigm is a suitable approach to connect users and service providers. For many private and public services, including transport and emergency services, only some subscribers should receive event notifications. This paper proposes and investigates the performance of a new ENS framework which allows the sending of events to a subset of subscribers with the best conditions to handle it. The event model implemented by the ENS framework is derived from the publish-subscribe approach. It allows the best subscribers to receive the event based on a specific fitness function. An application of the ENS to the transport service is presented. The results show that when the best subscribers are chosen according to a specific desired metric, the travel time can be reduced or the best drivers can be selected. Therefore, this strategy can improve passengers' experience and optimize service performance.