Beam-Aware Random Access for Coverage Enhancement Switching
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving successful random access due to insufficient consideration of coverage enhancement levels and beam selection strategies, leading to high failure rates, especially in scenarios requiring improved coverage, such as industrial sensors and video surveillance.
Innovation Solution
A method for random access that involves determining an initial coverage enhancement level based on signal strength and switching strategies, including beam and coverage enhancement level prioritization, to optimize random access attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple random access attempts are made to improve connection reliability, then the success rate of random access increases, but the time required for random access increases
Solution Approach 1:
The patent applies preliminary action by determining the coverage enhancement level before the random access attempt is made. The terminal measures signal strength and pre-calculates which coverage enhancement level to use, so that when random access is needed, the terminal can immediately proceed with the appropriate level without needing to try multiple levels sequentially, thus reducing time while maintaining success rate.
Solution Approach 2:
The patent changes the parameter of coverage enhancement level based on signal strength measurements. By dynamically selecting the appropriate coverage enhancement level (0, 1, or 2) according to the measured signal strength, the system optimizes the random access process to achieve successful connection with minimal attempts, reducing both time loss and maintaining high reliability.
2Area of stationary object
If coverage enhancement level is increased to improve signal coverage, then the coverage area increases, but the random access failure rate increases due to resource conflicts
Solution Approach 1:
The patent applies local quality by tailoring the coverage enhancement level to the specific local signal strength conditions. Instead of uniformly applying high coverage enhancement across the entire area, the system measures signal strength at each location and applies the appropriate coverage enhancement level (0 for strong signal, 1 for moderate signal, 2 for weak signal) locally, thereby reducing resource conflicts and failure rates in areas where high coverage enhancement is not necessary.
Solution Approach 2:
The patent makes the coverage enhancement level dynamic rather than static. The terminal dynamically determines the coverage enhancement level based on real-time signal strength measurements during the random access process. This dynamic adaptation allows the system to adjust the coverage enhancement level to match actual channel conditions, reducing unnecessary resource occupation and minimizing failure rates caused by resource conflicts in areas with adequate signal coverage.
3Strength
If beam switching strategy is implemented to improve signal quality, then the signal strength improves, but the complexity of random access procedure increases
Solution Approach 1:
The patent segments the beam switching process into discrete, manageable steps based on signal strength thresholds. The terminal measures signal strength and selects from predefined coverage enhancement levels (0, 1, or 2), which correspond to specific beam configuration settings. This segmentation simplifies the complexity by providing clear decision rules rather than requiring continuous or arbitrary beam switching, making the procedure more manageable while still achieving signal quality improvement.
Data Source
AI summary
The present disclosure is related to a method for random access. The method for random access includes the following steps: determining a coverage enhancement level on a beam for the random access attempt based on a signal strength of a measured beam; and switching the coverage enhancement level based on a preset switching strategy for a random access attempt.