5G UE Beam Search Space Reduction via Geo-Location
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Solution Overview
Problem
In 5G communication systems, the existing beam measurement procedures in user equipment (UE) are computationally expensive and consume significant power, especially when the UE is in motion and needs to frequently perform beam switching.
Innovation Solution
The UE determines its geo-location and the geo-location of the next generation node B (gNB), calculates the relative angle of reception, and reduces the beam search space to a subset of beams centered at this relative angle, thereby optimizing power consumption and reducing computational overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE performs beam measurement for all beams spanning 360 degrees, then the optimal beam can be accurately determined, but the computational overhead and power consumption increase significantly
Solution Approach 1:
The patent applies local quality by focusing beam measurements only in the relevant angular region where the gNB is located, rather than measuring all 360 degrees. The UE determines the angular region based on its orientation and the gNB's position, then performs measurements only within this localized region, significantly reducing power consumption while maintaining accurate beam selection.
Solution Approach 2:
The patent segments the full 360-degree beam search into a smaller angular region based on UE orientation and gNB location. By dividing the measurement space into relevant and irrelevant regions, the UE can ignore beams that are unlikely to be optimal, reducing the total number of measurements required and thus lowering power consumption.
2Reliability
If the UE performs frequent beam switching due to motion, then the optimal beam can be maintained, but the computational overhead and power consumption increase
Solution Approach 1:
The patent applies preliminary action by pre-determining the angular region for beam measurements based on the UE's current orientation and gNB location before actually performing measurements. This allows the UE to prepare the measurement configuration in advance, reducing the computational overhead during dynamic beam switching operations.
Solution Approach 2:
The patent implements dynamics by continuously updating the angular region based on the UE's changing orientation and motion state. The UE dynamically adjusts the measurement region to match its current operational context, enabling efficient beam switching without excessive computational overhead.
3Use of energy by moving object
If the UE skips beam measurement based on orientation change, then power consumption is reduced, but beam scheduling errors occur leading to measurement repetition
Solution Approach 1:
The patent applies feedback by using the UE's orientation information to dynamically adjust the angular region for beam measurements. The system continuously monitors orientation changes and adapts the measurement region accordingly, ensuring that beams are measured when needed while avoiding unnecessary measurements, thus balancing power consumption with measurement accuracy.
Data Source
Figure 1A~1C
Figure 2~3A
Figure 3B~3C
AI summary
Disclosed is a user equipment (UE) for determining beam search space by a user, including a communication interface, and a processor coupled to the communication interface, wherein the processor is configured to, determine a geo-location of a base station and a geo-location of the UE at a current time instance, determine a relative angle of reception from the base station based on the geo-location of the base station and the geo-location of the UE at the current time instance, determine a beam search space comprising a plurality of beams, for measurement, centered at the relative angle of reception, and determine an optimal beam from within the beam search space based on the measurement of the plurality of beams in the beam search space.