The Adaptive High Resolution (AHR) solution is designed for massive MIMO scenarios and uses advanced multi-antenna algorithms. It enhances both user experience and system capacity through three main features: accurate targeting (high-precision channel estimation), fast tracking (adaptive UE channel policy adjustment), and refined pairing (high-precision beamforming).
Background of AHR
Massive MIMO is a key advanced multi-antenna technology in the 4.5G and 5G eras. As a new site type, massive MIMO uses 32T32R AAUs and more RF channels and antennas to perform 3D beamforming and multi-layer, multi-user transmission. This allows massive MIMO to provide higher system capacity compared to traditional antenna setups such as 2T2R or 4T4R. However, the rapid increase in users and traffic brings higher demands for better user experience and improved system capacity.
To address these challenges, new solutions have been developed for both FDD and TDD networks. For FDD, the Smart Massive MIMO solution integrates traditional MIMO functions with advanced features like Turbo Coverage and Intelligent Hybrid Beamforming for better coverage and performance. For TDD, the AHR solution is introduced, which takes advantage of the higher flexibility and degrees of freedom of 64T64R AAUs compared to 32T32R AAUs, especially in beamforming weight control.
Key Technologies of AHR
In massive MIMO environments, AHR introduces several key technologies to overcome challenges caused by different UEs, user behaviors, and interference in densely covered networks.
High-precision channel estimation makes CSI-RS and SRS-based channel estimation more accurate.
UE channel policy adaptation automatically adjusts MCS selection and scheduling priorities for each UE based on channel conditions and service type to achieve optimal performance.
High-precision beam supports MU pairing for UEs with different DMRS types, using refined MU pairing algorithms to match more UEs effectively. It also selects the best rank and resource allocation for UEs involved in multi-user pairing.