ABSTRACT
Software Defined Network (SDN) is one of the major emerging technologies used in the development of fifth generation (5G) mobile communication systems. This chapter elaborates the basic overview on SDN and its historical background, and it also explains the concept of Network Function Virtualization (NFV) and its development and major importance in the upcoming 5G networks as well as in future day’s evolutionary telecommunication networks. It drafts the idea of an SDN-/NFV-enabled 5G network architecture. The chapter elaborates the challenges based on current day’s network architectures and the probable solutions based on Softwarized NFV. SDN is all about restructuring, transferring, and modifying the existing network architecture in an efficient manner. Considering a network viewpoint, the switches along the routing path have been configured with thousands of lines of codes providing packet forwarding rules, mobility management (MM), traffic handling capacity, etc.
