Dynamic Uplink Beamforming Mode Selection via Path Loss Comparison
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Solution Overview
Problem
Current 5G base station and user equipment systems face challenges in optimizing uplink beam management due to static selection methods based on UE capability, which do not account for environmental factors and channel reciprocity variations.
Innovation Solution
Implementing a method for a base station to dynamically evaluate channel reciprocity by comparing uplink and downlink path losses, allowing for real-time selection between two uplink beamforming management modes, thereby adapting to changing environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static beamforming mode selection based on UE capability is used, then device complexity is reduced, but adaptability to changing channel conditions deteriorates
Solution Approach 1:
The patent implements dynamic beamforming mode selection where the base station continuously monitors uplink and downlink path losses and adjusts the beamforming mode (analog or digital) based on real-time channel reciprocity conditions. This transforms the static capability-based selection into a dynamic environment-adaptive mechanism, resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
The system establishes a feedback loop where the base station measures path losses on both uplink and downlink, compares them to determine channel reciprocity, and uses this information to dynamically select the optimal beamforming mode. This feedback mechanism enables the system to adapt to changing environmental conditions while maintaining manageable complexity through automated decision-making.
2Adaptability or versatility
If dynamic path loss comparison is implemented, then adaptability to channel conditions is improved, but measurement precision requirements increase
Solution Approach 1:
The patent uses path loss comparison as an intermediary metric to infer channel reciprocity conditions without requiring direct measurement of reciprocity itself. By comparing uplink and downlink path losses (which can be measured using standard reference signals), the system indirectly determines whether analog or digital beamforming is more suitable, reducing the precision burden while maintaining adaptability.
Solution Approach 2:
The system monitors changes in path loss parameters over time and uses these parameter variations to trigger beamforming mode transitions. Rather than requiring absolute precision, the system detects relative changes and trends in path loss measurements, enabling adaptive behavior with relaxed precision requirements through parameter thresholding and hysteresis mechanisms.
3Productivity
If real-time beamforming mode switching is performed, then spectrum efficiency is improved, but device complexity increases
Solution Approach 1:
The base station autonomously performs path loss measurements, comparisons, and beamforming mode selections without requiring complex UE involvement or manual configuration. The UE simply reports standard measurement data, and the base station's processing circuitry automatically makes decisions based on pre-configured algorithms, enabling real-time adaptation while keeping overall system complexity manageable through centralized intelligent control.
Data Source
AI summary
Examples relate to processing circuitry, processing means, methods and computer programs for a base station and a user equipment. The processing circuitry for the base station is configured to select one of a first uplink beamforming management mode and a second uplink beamforming mode for a beamformed uplink communication between a user equipment and the base station. The selection is based on a path loss on a first wireless channel between the base station and the user equipment and based on a path loss on a second wireless channel between the user equipment and the base station. The processing circuitry is configured to provide an instruction related to the selection of the first or second uplink beamforming management mode to the user equipment.