5G User Equipment Beam Selection for Random Access
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Solution Overview
Problem
In 5G communication systems, user equipment faces challenges in selecting the appropriate beam for random access, as multiple beams are available, and existing methods do not effectively improve the success rate of this process.
Innovation Solution
A method where user equipment acquires configuration information for random access resources across multiple beams, measures signal quality, selects the best beam based on measurement results, and initiates random access using the determined resources, potentially selecting multiple beams for improved success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment selects a beam for random access in 5G communication systems, then the random access process can be initiated, but the success rate of random access is not effectively improved due to multiple available beams and lack of effective selection methods
Solution Approach 1:
The patent applies preliminary action by measuring signal quality of multiple beams before initiating random access. The user equipment performs beam measurement and selection in advance, determining the optimal beam based on signal quality metrics (such as RSRP - Reference Signal Received Power) before the actual random access procedure. This pre-measurement and pre-selection process ensures that the random access is initiated on the best available beam, thereby improving success rate without adding significant complexity during the critical access moment.
Solution Approach 2:
The patent utilizes parameter changes by evaluating different beam parameters (signal quality metrics like RSRP, SINR - Signal to Interference plus Noise Ratio) to select the optimal beam. The user equipment changes the selection criterion from arbitrary or single-beam selection to multi-parameter-based optimization, where beams are compared based on measured signal quality parameters. This parameter-driven approach systematically improves random access reliability by selecting beams that meet predetermined quality thresholds.
2Measurement precision
If user equipment measures signal quality of multiple beams, then better beam selection is achieved, but measurement and processing time increases
Solution Approach 1:
The patent applies partial action by measuring signal quality of a limited set of beams rather than all possible beams. The user equipment identifies a subset of candidate beams (excessive but controlled) that are most likely to be suitable for random access, and performs detailed measurement only on these candidates. This partial measurement approach achieves sufficient measurement precision for reliable beam selection while significantly reducing the total measurement time compared to exhaustive measurement of all beams.
Solution Approach 2:
The patent uses preliminary action by performing quick screening measurements on multiple beams to identify candidate beams with acceptable signal quality, then performing more detailed measurements only on these candidates. This two-stage measurement process (initial screening followed by detailed measurement of selected candidates) achieves high measurement precision for the final beam selection while minimizing total measurement time by avoiding detailed measurement of all beams.
Data Source
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AI summary
A random access method and a user equipment are provided. The random access method includes: acquiring configuration information, where the configuration information includes random access resource configuration information of at least two beams; acquiring signal quality measurement result information of the at least two beams; selecting at least one beam according to the signal quality measurement result information of the at least two beams; an determining a random access resource of the at least one beam according to the random access resource configuration information of the at least one beam, and initiating a random access on the determined random access resource through the at least one beam.