Wireless Random Access Beam Segmentation for Wider Coverage
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Solution Overview
Problem
Existing wireless communication systems face challenges in improving the coverage of random access procedures due to the limited ability of base stations to receive initial random access messages using wide receive beams.
Innovation Solution
The implementation of narrow receive beams by base stations to monitor for random access messages, which partially overlap with the wide receive beams corresponding to the transmit beams for synchronization signal blocks, allows for improved coverage of random access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If base stations use wide receive beams to monitor for random access messages, then the coverage area is larger, but the detection precision and success rate decrease
Solution Approach 1:
The patent divides the wide receive beam into multiple narrow receive beams, each monitoring specific random access occasions. This segmentation allows the base station to maintain large coverage area while improving detection precision through narrower, more focused beams that can better distinguish and detect random access messages.
Solution Approach 2:
The patent introduces a new dimension by associating different receive beams with different random access occasions (time/frequency resources). This dimensional separation allows the system to achieve both wide coverage and high detection precision simultaneously by distributing monitoring across multiple dimensions.
2Measurement precision
If base stations use narrow receive beams to monitor for random access messages, then the detection precision improves, but the coverage area decreases
Solution Approach 1:
The patent makes the receive beam system universal by configuring multiple narrow receive beams that collectively cover the entire wide beam coverage area. Each narrow beam serves a specific function (monitoring particular random access occasions), while together they fulfill the universal requirement of comprehensive coverage with improved detection precision.
3Reliability
If base stations configure multiple receive beams for different random access occasions, then the random access success rate increases, but the system complexity increases
Solution Approach 1:
The patent implements dynamic receive beam switching where the base station activates specific narrow receive beams based on which random access occasions are being monitored. This dynamic approach increases reliability by ensuring the correct beam is active for each occasion, while managing complexity through systematic beam selection rather than maintaining all beams simultaneously.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first indication of a first set of random access occasions associated with a synchronization signal block that corresponds with a first receive beam of a base station. The UE may receive a second indication of a second set of random access occasions that are each associated with a respective receive beam of a set of receive beams of the base station. Each receive beam of the set of receive beams may spatially overlap a portion of the first receive beam. The UE may transmit the random access message using a selected random access occasion of the second set of random access occasions.