Distributed event-based system with multiscoping for multiscalability

Distributed Event-Based System (DEBS) provides a versatile solution for asynchronously exchanging data in a distributed system, loosely-coupled in space and time. The software architecture of a DEBS is composed of an over-lay network of brokers that are responsible for routing data from producers to consumers. An important issue is the cost (in terms of exchanged messages) of the installation of advertisement or subscription filters on the brokers and the cost of routing notifications. The problem is exacerbated in large and heterogeneous systems involving clouds, cloudlets, desktops, laptops, mobile phones, and smart objects of the Internet of Things (IoT). In this paper, we associate the system concept of scale (of multiscale distributed systems) with the concept of scope (of DEBS) and we introduce DEBS with multiscoping. We also extend the requirements of distributed routing to deal with multiscoping. In the context of the IoT, we show in an illustrative example that the solution allows application designers and system administrators to tag advertisements and subscriptions for semantically delimiting scopes that are superposed.