Queueing Networks

Probabilistic Event Dropping for Intermittently Connected Subscribers over Pub/Sub Systems

Internet of Things (IoT) aim to leverage data from multiple sensors, actuators and devices for improving peoples' daily life and safety. Multiple data sources must be integrated, analyzed from the corresponding application and notify interested …

FireDeX: a Prioritized IoT Data Exchange Middleware for Emergency Response

Real-time event detection and targeted decision making for emerging mission-critical applications, e.g. smart fire fighting, requires systems that extract and process relevant data from connected IoT devices in the environment. In this paper, we …

Queueing Network Modeling Patterns for Reliable and Unreliable Publish/Subscribe Protocols

Mobile Internet of Things (IoT) applications are typically deployed on resource-constrained devices with intermittent network connectivity. To support the deployment of such applications, the Publish/Subscribe (pub/sub) interaction paradigm is often …

Performance Modeling of the Middleware overlay Infrastructure of Mobile Things

Internet of Things (IoT) applications consist of diverse Things (sensors and devices) in terms of hardware resources. Furthermore, such applications are characterized by the Things' mobility and multiple interaction types, such as synchronous, …

Timeliness Evaluation of Intermittent Mobile Connectivity over Pub/Sub Systems

Systems deployed in mobile environments are typically characterized by intermittent connectivity and asynchronous sending/reception of data. To create effective mobile systems for such environments, it is essential to guarantee acceptable levels of …