Random Access Channel Selection Using SFN and Cell/TRP Signals
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Solution Overview
Problem
The increasing use of higher frequency bands in future communications systems reduces cell coverage and introduces frequent mobility scenarios, leading to higher power consumption due to increased terminal measurements, for which there is no effective random access method in cell-free or single frequency network (SFN) scenarios.
Innovation Solution
A random access method and apparatus that utilize SFN specific and cell/TRP specific reference signals to select and initiate random access channels, reducing power consumption and enabling fast access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If cell free or single frequency network (SFN) is introduced to reduce terminal power consumption, then power consumption is reduced, but there is no random access method available for this scenario
Solution Approach 1:
The patent applies universality by making the random access method applicable to both traditional cell-based networks and SFN scenarios. The terminal selects RACH resources based on reference signal types (SFN-specific or cell/TRP-specific), allowing the same random access procedure to function universally across different network architectures without requiring separate methods for each scenario.
2Productivity
If higher frequency bands are deployed to increase capacity, then system capacity is improved, but cell coverage range becomes smaller and terminal power consumption increases
Solution Approach 1:
The patent segments the random access resource selection process into distinct paths based on reference signal types. Terminals in SFN scenarios select RACH resources associated with SFN-specific reference signals, while terminals in traditional cell scenarios select resources associated with cell/TRP-specific reference signals. This segmentation allows optimized resource selection for each scenario, reducing unnecessary measurements and power consumption.
3Adaptability or versatility
If frequent mobility scenarios are supported to accommodate diverse application scenarios, then system adaptability is improved, but terminal measurements increase and power consumption rises
Solution Approach 1:
The patent introduces dynamic behavior in the random access resource selection process. The terminal dynamically adapts its RACH resource selection based on the detected reference signal type and network scenario. This dynamic adaptation allows the system to support diverse mobility scenarios efficiently by adjusting the access method according to current network conditions, rather than using a fixed approach that would require continuous measurements in all scenarios.
Data Source
AI summary
A random access method and apparatus, a terminal, and a readable storage medium are provided. The method includes: selecting a target random access channel (RACH) resource associated with a first reference signal or a second reference signal; and using the target RACH resource to initiate random access, where the first reference signal is a single frequency network (SFN) specific reference signal, and the second reference signal is a cell/transmission reception point (cell/TRP) specific reference signal.