TRP Beam Grouping by Path Gain Threshold for 5G Scheduling
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Solution Overview
Problem
In the context of 5G mobile communication systems, existing methods for grouping transmission point (TRP) beams based on their best User Equipment (UE) beams often result in small or empty sets of usable TRP beams, limiting the number of available options for data transmission scheduling, especially at higher frequencies where high-gain beamforming is required.
Innovation Solution
A method is introduced to form TRP beam groups by including TRP beams with 'good enough' path gain, rather than just the best path gain, to create larger groups of usable TRP beams for each UE beam, thereby increasing the probability of having more TRP beams available for data transmission scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TRP beams are grouped based on the best UE beam only, then the grouping is simple and fast, but the set of usable TRP beams becomes small or empty, limiting scheduling options
Solution Approach 1:
The patent changes the grouping criterion from requiring the absolute best UE beam to allowing TRP beams with sufficient path gain (above a threshold). This parameter change expands the set of usable TRP beams from those with optimal UE beam association to those meeting a minimum quality threshold, thereby increasing scheduling flexibility while maintaining adequate link quality
Solution Approach 2:
Instead of requiring complete optimality (best UE beam), the patent accepts partial satisfaction of the quality requirement (sufficient path gain). This partial action approach includes more TRP beams in the groups, providing more options for scheduling without demanding the strictest possible condition
2Productivity
If more TRP beams are included in groups, then more scheduling options are available, but the path gain quality may deteriorate
Solution Approach 1:
The patent introduces a path gain threshold parameter to control the inclusion of TRP beams in groups. By adjusting this threshold, the system balances between including more beams (increasing scheduling options) and maintaining sufficient link quality (preserving reliability). This parameter-based control allows flexible trade-off management
3Power
If narrow beamforming is used at higher frequencies, then link budget is improved, but beam coverage area becomes small, requiring frequent beam switching
Solution Approach 1:
The patent performs preliminary grouping of TRP beams based on sufficient path gain criteria, creating a pool of candidate beams in advance. When beam switching is needed, the TRP can quickly select from pre-grouped beams that are known to have adequate quality, reducing the need for extensive real-time evaluation and enabling faster switching to cover the small beam areas effectively
Data Source
AI summary
A group TRP beams for a given UE beam is formed by adding to the group of TRP beams any TRP beam for which the path gain meets a threshold. That is, grouping TRP beams that have “good enough” path gain to a certain UE beam in the same group. An advantage of forming a group TRP beams for a given UE beam by including in the TRP beam group any TRP beam for which the path gain meets a threshold is that, in many scenarios, there is a greater probability that there will be more usable TRP beams included in the group. This feature can be useful during multi-user scheduling at the TRP.