Survey on software-defined networking and network functions virtualisation in 5G emerging mobile computing
This chapter contains a summary of 5G requirements and challenges, with emphasis on those supposed to be (partially) solved through SDN/ NFV control. Some relevant 5G use cases and services are summarised. A short presentation of SDN and NFV concepts and architectures is done related to layering, CPl and DPl issues, network operation systems (NOS) and software technologies, virtualisation, north-bound and south-bound interfaces, function chaining, scalability and real-time issues and so on. The second part of the chapter explores various architectures and implementations based on SDN/NFV in a 5G environment: distribution versus centralisation, unified CPl concepts in 5G/SDN, heterogeneous CRANs, cellular 5G with SDN control, an SDN approach for mobile cloud computing in 5G, backward compatibility and deployment issues.