During the evolution from LTE to NR, multi-antenna technology is a key technology to improve the overall system throughput. The multi-antenna technology is an effective means to increase system capacity compared with networks extension. The more the antenna arrays are, the narrower the beams become to achieve better isolation and interference control. Based on narrow beams formed by beam-forming, the same spectrum resources are reused in the same geographic area to obtain resource multiplexing gains. Negatively, as the multi-antenna solution, coverage overlapping increases and inter-cell load imbalance occurs accordingly, which is a key problem to be addressed in the network optimization practice.

During the initial stage of 700MHz NR construction, 5G terminals penetration is less, which will cause the problem of low spectrum utilization and efficiency. The NR and LTE may share the common 700MHz band spectrum, which may improve the existing 4G users' experience and the overall system (NR & LTE) efficiency. Dynamic power sharing methodology can be considered for the spectrum sharing process to improve user perception. After 700MHz NR construction and commercialization, it can be considered to couple with the 2.6GHz and 4.9GHz of NR TDD to complement the wide-area coverage, deep indoor coverage, and hotspot capacity of the overall network.