Subband Full Duplex (SBFD) is a new duplex mode with the TDD carrier split into sub-bands to enable simultaneous transmission and reception in the same slots. Together with cross-subband scheduling, the gNB could provide simultaneous guarantee of large uplink throughput and low latency to meet the requirements of critical vertical applications, and with flexible frame structure, the gNB could work with legacy terminals. SBFD can provide user-level service capability customization, so to flexibly fulfill various B2B and B2C applications requirements.