Centralized and Distributed Schedulers for Non-Coherent Joint Transmission

This paper studies the performance of three typical network coordination schemes, i.e., dynamic point selection, fully overlapped non-coherent joint transmission (F-NCJT), and non-fully overlapped NCJT (NF-NCJT), in 3GPP new radio (NR) in indoor scenarios via system level simulation. Each of these schemes requires a different level of user data and channel state information (CSI) report exchange among coordinated transmission reception points (TRPs) depending on centralized or distributed schedulers. Scheduling strategies of these network coordination schemes are briefly discussed. It has been demonstrated that distributed network coordination schemes (e.g., NF-NCJT) can still perform reasonably well; a result which has important implications to the design of the fifth generation (5G) cellular network architecture.