Unified Air Interface: A next generation air interface
The new ZTE 5G Unified Air Interface (UAI) can meet a diverse range of service requirements across a unified wireless network. With ZTE’s unique UAI technology it can be deployed across the whole spectrum (from low to high frequency bands).
A Unified Air Interface: A three-layered solution
- Unified bottom layer: The bottom layer contains a transparent physical layer to meet a diverse range of service and spectral requirements. Its unified structure and OFDM waveform dynamically adapt to any service and any spectrum.
- Sliced middle layer: The intermediate layer contains flexible network slices customized for specific services and applications. Each layer of the network slice is designed to meet a different set of performance characteristics according to the service type and traffic requirements.
- Smart top layer: A smart top layer with service awareness plays an important role in enabling the efficient sharing of resources to achieve intelligent service convergence.
Four key technologies of UAI: An air interface for all services
- FB-OFDM waveform: Simultaneously improving performance and reducing complexity, the filter bank-based OFDM can dynamically adapt to the service requirements of enhanced Mobile BroadBand (eMBB), the Internet of Things (IoT) and vehicle-to-infrastructure (V2X) technology. The unique technology is able to support an expanding range of IoT services due to its longer transmission time interval (TTI) and narrow frequency range. This enables the network to support a higher number of connected devices at a low bitrate. The short TTI and wide spectrum efficiency also benefits new types of services such as ultra-low latency V2X applications.
- Unified interface: The ZTE 5G unified interface will deliver optimised OFDM-based waveforms with scalable numerology to scale from low spectrum bands to extremely high frequency mmWave, and enable effective subcarrier distribution to intelligently allocate spectrum fragments.
- Multiple access: ZTE’s multi-User Shared Access (MUSA) uses non-orthogonal complex spreading sequences to allow multiple users to transmit at the same time and frequency, improving the connection of IoT devices by up to six times.
- Massive MIMO: with precise beamforming capability and advanced spatial diversity, Massive MIMO can provide higher network throughput and improve spectral efficiency by six times or more. This helps operators make full use of spectrum resources to significantly enhance wireless network coverage and capacity.