Implementation of FAPI interface for the 5G Base Station

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Name of the Speaker: KBSMDS Sai Prasanth (EE19S080)
Guide: Dr. Radha Krishan Ganti
Venue/Online meeting link: ESB 210B
Date/Time: October 26th (Wednesday), 2:00 PM

5G-NR offers a full range of mobile broadband services, including massive connectivity from human-held intelligent devices to sensors and machines. More importantly, it can support critical machine-based communications with instant action and ultra-high reliability. Several physical and virtual network interfaces, such as FAPI, ORAN, and PCI-E, play a prominent role in achieving high throughput for 5G base stations. In our work, we concentrate primarily on the architectural implementation of one such prime interface, FAPI, abbreviated as the Functional Application Programming Interface. Broadly, FAPI is an interface that helps communicate between the MAC layer of the Layer 2 protocol stack and the PHY Layer in wireless systems. In contrast to the FAPI in 4G LTE, FAPI in 5G NR offers advanced error indication messaging, reliability and secured communication for messages and structure exchange procedures between L2 and L1 at higher throughput. In this work, we propose an FPGA-based implementation methodology for FAPI that manages the physical layer and allows synchronised data flow between MAC and PHY. We look at the architectural implementation of FAPI in the 5G testbed.