Coordinated Composition of Continuous Service Collaborations in Decentralized Smart Computing Environments

The increasing number of smart systems provides more and more independently developed services. Though the services are intended to work autonomously, their participation within a collaboration will result in a synergy more than only the sum of the individual parts. The challenge to demarcate the individual services and their collaboration and to avoid mutual dependencies has been recently approached by utilizing the Concept of Roles, providing roles, which interact with other roles within a collaboration, and are performed by players. Roles can intermesh with their player and thereby change their behavior solely for the collaboration they are participating in. The collaborative nature of roles, i.e., inherently describing complex interactions, is highly beneficial to dynamic, autonomous composition of collaborative systems. This paper contributes a protocol for coordinated composition of role-based continuous service collaborations in decentralized smart computing environments. An experimental evaluation underlines the feasibility of a decentralized approach since discovery and composition of services can be performed in reasonably short time even in setups up to 150 services involved in a single collaboration.