User Terminal Cell Measurement in Multi-Beam Radio Systems
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Solution Overview
Problem
In future radio communication systems like 5G, the use of high carrier frequencies leads to increased propagation loss and difficulty in securing coverage due to severe distance-induced attenuation and stronger linearity of radio waves, especially in multi-beam scenarios where cells are formed with multiple beams, making it challenging to measure cell-level quality and select appropriate cells.
Innovation Solution
A user terminal equipped with a receiving section and a measuring section that obtains measurement results for one or more beams, allowing for the derivation of cell-level measurement results, enabling proper cell selection and reselection even in multi-beam scenarios by converting beam-level measurement results into cell-level measurement results through filtering and evaluation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple beams are used to form cells in high frequency bands, then coverage and data rates are improved, but measurement and selection of appropriate cells becomes difficult
Solution Approach 1:
The patent segments the cell measurement task into beam-level measurements and cell-level measurements. The UE measures individual beams and then aggregates these measurements to determine cell-level quality, making the measurement process manageable despite the presence of multiple beams
Solution Approach 2:
The patent combines multiple beam-level measurement results to derive a cell-level measurement result. By merging the measurements from multiple beams, the system achieves comprehensive cell quality assessment that reflects the overall cell performance
2Quantity of substance
If high carrier frequencies are used, then bandwidth and capacity are increased, but propagation loss and coverage difficulty increase
Solution Approach 1:
The patent employs beam forming to continuously focus and direct radio energy toward the user terminal, compensating for the higher propagation loss at high frequencies. This continuous directional transmission maintains effective coverage despite the increased frequency
Solution Approach 2:
The patent changes the spatial distribution parameter of transmitted energy by using multiple beams with specific directional characteristics. This parameter change allows the system to overcome the inherent propagation loss at high frequencies through focused energy delivery
Data Source
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Figure 3A~3B
AI summary
The present invention is designed to acquire cell-level measurement results appropriately when multiple beams are applied. A user terminal has a receiving section that receives a predetermined signal, and a measurement section that acquires measurement results pertaining to one or more beams based on the predetermined signal, and acquires a cell-level measurement result based on the measurement results pertaining to one or more beams.