Random Access Occasion Resource Determination for 2-Step CFRA
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Solution Overview
Problem
In communication technologies, terminals face difficulties in determining random access occasion resource information for contention-free random access (CFRA) when this information is absent in CFRA configuration, especially with the expansion of communication technology and diverse application scenarios.
Innovation Solution
A method where a terminal initiates 2-step CFRA and, in the absence of separate random access occasion (RO) resource information in CFRA configuration, determines RO resource information for the initiated 2-step CFRA based on RO resource information for contention-based random access (CBRA) in a specified release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple CBRA configuration information are configured for different features, then the system can adapt to diverse application scenarios, but it becomes difficult for the terminal to determine which CBRA configuration information to use for CFRA when separate RO resource information is not provided
Solution Approach 1:
The patent applies preliminary action by establishing a predetermined rule that the terminal should use RO resources from 2-step CBRA configuration for 2-step CFRA when separate RO resources are not configured. This pre-defined selection criterion eliminates the ambiguity that would otherwise arise from having multiple CBRA configurations for different features, allowing the terminal to automatically determine the correct resources without complex decision-making processes.
Solution Approach 2:
The patent introduces an intermediary rule that mediates between the CFRA requirement for RO resources and the multiple CBRA configurations. By specifying that 2-step CFRA should use 2-step CBRA RO resources as a default, this intermediary principle bridges the gap between different configuration types and resolves the selection difficulty, enabling smooth operation across diverse scenarios.
2Device complexity
If separate RO resource information is not configured in CFRA configuration, then the configuration can be simplified, but the terminal cannot accurately determine RO resources for 2-step CFRA
Solution Approach 1:
The patent applies universality by making the 2-step CBRA RO resources serve multiple purposes: they function as the default RO resources for 2-step CFRA when separate configurations are not provided. This multi-functionality approach allows the same resource configuration to support both CBRA and CFRA operations, simplifying the overall configuration while maintaining accurate resource determination for CFRA through the established correspondence rule.
Data Source
AI summary
A method for determining random access occasion resource information is performed by a terminal. The method includes: initiating 2-step contention-free random access (CFRA); and in case that separate random access occasion (RO) resource information configured in configuration information for the CFRA is absent for the terminal, determining RO resource information for the initiated 2-step CFRA according to RO resource information for contention-based random access (CBRA) in a specified release.