PRACH RO Determination for Clear SSB-Resource Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The unclear determination of ROs used for PRACH transmission with repetitions results in poor performance due to varying SSB-RO association based on different parameter values, leading to issues like preamble collisions and unsuccessful contention resolution.
Innovation Solution
A method and apparatus for determining ROs or RO sets used for PRACH transmission based on their association with SSBs or PRACH resource configurations, ensuring clear selection and improved performance through specific mapping rules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different parameter values are used for SSB-RO association, then the configuration flexibility is improved, but the RO determination becomes unclear and performance deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the SSB-RO association parameters (such as msg1-FDM, msg1-TimeFDMPattern, and ssb-perRACH-OccasionAndCB-PreamblesPerSSB) based on channel conditions and traffic requirements. This allows the system to change from static to dynamic parameter configuration, resolving the contradiction by enabling both flexibility and reliable RO determination through adaptive parameter selection.
Solution Approach 2:
The patent implements dynamics by transitioning from static SSB-RO association configurations to dynamic configurations that adapt to changing radio conditions. The network can dynamically indicate RO configurations through DCI formats and RRC signaling, allowing the system to respond to varying channel quality, mobility conditions, and traffic patterns while maintaining clear RO determination rules.
2Adaptability or versatility
If RO sets are determined based on varying SSB-RO association results, then the adaptability to different channel conditions is improved, but the RO selection becomes ambiguous and performance deteriorates
Solution Approach 1:
The patent introduces intermediary elements such as DCI formats (particularly DCI format 1_0 and 1_1 with specific RACH indications), RRC parameters, and predefined association rules that mediate between the SSB measurements and RO selection. These intermediaries provide structured mapping relationships that maintain selection clarity while enabling adaptability through network-configurable parameters and dynamic indications.
Solution Approach 2:
The patent applies preliminary action by pre-configuring SSB-RO association relationships through RRC parameters before actual PRACH transmission occurs. The network预先 establishes mapping rules, association patterns, and resource configurations that guide UE behavior, ensuring clear RO selection is available in advance while maintaining adaptability through configurable parameters that can be adjusted based on channel conditions.
3Reliability
If the PRACH transmission uses repetitions, then the reliability of transmission is improved, but the determination of RO sets becomes unclear and performance deteriorates
Solution Approach 1:
The patent applies continuity of useful action by ensuring that the RO determination rules remain consistent and continuously applicable across multiple PRACH repetition transmissions. The same SSB-RO association rules and parameters that determine the initial RO are maintained for subsequent repetitions, providing continuous guidance for RO selection throughout the repetition process and preventing information loss.
Solution Approach 2:
The patent uses copying by replicating the RO determination process and associated parameters for each PRACH repetition. The UE copies the SSB-RO association configuration and applies the same determination rules to identify RO sets for each repetition instance, ensuring that the determination information is preserved and consistently applied across all repetitions rather than being lost or ambiguous.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The present application belongs to the technical field of communications. Disclosed are an RO determination method and apparatus, and a terminal and a storage medium. The RO determination method in the embodiments of the present application comprises: on the basis of an RO or RO set respectively associated with at least one SSB or on the basis of a PRACH resource configuration, a terminal determining an RO or RO set for PRACH transmission.