Beam Group Selection for 5G NR Computation Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in reducing computation complexity and transmission size in 5G NR networks, particularly in selecting optimal precoders for beamformed transmissions, due to the high number of beams and complex feedback processes.
Innovation Solution
The solution involves identifying a second beam group with fewer beams than the maximum allowed, estimating channel statistics for both the first and second beam groups, and selecting the second beam group for communication when it exhibits channel statistics equal or greater than the first group, thereby reducing computation complexity and transmission size by using a precoder that designates fewer beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a maximum number of beams are used for beamformed transmissions, then channel statistics are improved, but computation complexity increases
Solution Approach 1:
The patent extracts only the necessary number of beams (L) from the maximum allowed beams (L_MAX) based on channel conditions. When channel statistics indicate that fewer beams are sufficient to achieve acceptable performance, the system selects only those essential beams, thereby reducing computation complexity while maintaining adequate channel statistics.
Solution Approach 2:
The system dynamically changes the parameter L (number of beams) based on channel statistics evaluation. Instead of using a fixed maximum number of beams, the patent adjusts L adaptively - reducing it when channel conditions permit, thus lowering computation complexity while preserving sufficient channel statistics when needed.
2Reliability
If a maximum number of beams are used for beamformed transmissions, then channel statistics are improved, but transmission size increases
Solution Approach 1:
The patent extracts and transmits only the essential beam information (precoder indices for L beams) rather than information for all maximum allowed beams (L_MAX). By identifying and transmitting only the necessary subset of beam data based on channel statistics, the transmission size is reduced while maintaining adequate channel representation.
Solution Approach 2:
The system changes the transmission parameter from reporting all L_MAX beams to reporting only L selected beams, where L ≤ L_MAX. This parameter adjustment reduces the quantity of transmitted data (precoder indices and associated information) while preserving sufficient channel statistics for effective communication.
3Device complexity
If fewer beams are selected for beamformed transmissions, then computation complexity is reduced, but channel statistics may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where channel statistics are continuously evaluated to determine the appropriate number of beams L. This feedback loop ensures that beam selection is adaptive - when channel conditions deteriorate, the system can increase L to maintain sufficient statistics, and when conditions improve, it can reduce L to lower complexity.
Solution Approach 2:
The system makes the number of beams L dynamic rather than static. Instead of fixing L to either the maximum or a constant value, the patent allows L to vary based on real-time channel statistics evaluation, enabling the system to optimize between computation complexity and channel statistics representation adaptively.
Data Source
AI summary
Wireless devices are adapted to facilitate beamforming communications in wireless networks. A wireless device may identify a first beam group with a number of beams equal to a maximum number of allowed beams, and a second beam group with a number of beams less than the maximum number of allowed beams. Channel statistics may be estimated for each of the first beam group and the second beam group, and the second beam group may be selected for communications when the second beam group is determined to have at least substantially equal or greater channel statistics compared to the first beam group. Other aspects, embodiments, and features are also included.