Technicalities of O-RAN for 5G and B5G

Telecom sector across the globe is gradually transiting towards 5G & B5G. This is due to its unparallel advantages of it over the existing technologies i.e. 4G or 3G. At the same time, several new challenges related to Spectrum and Bandwidth, Security, Cost etc. are reported regarding this technical transition. Among these, Interoperability of RAN, and Software Driven Network (SDN) are main starving areas for researchers and developers. The idea of this paper is to provide architectural details of O-RAN, suggested by O-RAN Alliance. Also, in this paper the reader will come to know about functional BBU split. With all these, our purpose is to enable readers to have a basic knowledge of architectural technicalities of O-RAN in detail.