Network service orchestration: a survey

Business models of network service providers are undergoing an evolving transformation fueled by vertical customer demands and technological advances such as 5G, Software Defined Networking (SDN), and Network Function Virtualization (NFV). Emerging scenarios call for agile network services consuming network, storage, and compute resources across heterogeneous infrastructures and administrative domains. Coordinating resource control and service creation across interconnected domains and diverse technologies becomes a grand challenge. Research and development efforts are being devoted to enabling orchestration processes to automate, coordinate, and manage the deployment and operation of network services. In this survey, we delve into the topic of Network Service Orchestration (NSO) by reviewing the historical background, relevant research projects, enabling technologies, and standardization activities. We define key concepts and propose a taxonomy of NSO approaches and solutions to pave the way towards a common understanding of the various ongoing efforts around the realization of diverse NSO application scenarios. Based on the analysis of the state of affairs, we present a series of open challenges and research opportunities, altogether contributing to a timely and comprehensive survey on the vibrant and strategic topic of network service orchestration142-1436994This research was supported by the Innovation Center, Ericsson S.A., Brazil, grant UNI.62 and Federal Institute of Piaui (IFPI), Brazil. This document, however, does not necessarily represent Ericsson’s official viewpoint. The authors would also like to express their gratitude to contributions from David Moura, Lucian Beraldo, Nazrul Islam, and Suneet Singh (in alphabetical order) funded by the EU-Brazil NECOS project under grant agreement no. 77706