5G RAN optimizations through radio shared data layer (RSDL)

This paper presents the challenges that are currently faced during X2/Xn handovers. Messages are exchanged between source and target eNBs over X2/Xn interface during handovers. This mechanism is quite inefficient due to messaging overheads, timers, retries and failures like message validation and resource unavailability. The paper proposes optimizations in the X2/Xn interface, thereby improving the handover success rate and reducing messaging overheads. The paper proposes moving the radio layer data from the individual nodes to a centralized database christened by us as “Radio Shared Data Layer” (RSDL) and demonstrates ensuing benefits. The paper also proposes an open interface from the radio shared data layer to 3
^rd
party applications allowing them to be radio network context aware thus perform better and offer richer experience.