PRACH Repetition Power Setting for Simplified Random Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The complexity of UE/base station operations in wireless communication systems increases due to separate definitions for different RACH resources, and there is a need to efficiently manage PRACH repetition resources with varying repetition numbers.
Innovation Solution
A method and device for configuring PRACH repetition transmission by allowing the same repetition number to be assigned to multiple PRACH resources, with defined procedures for UE and base station operations, including power control and resource selection based on RACH configurations and RSRP measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate definitions for different RACH resources are made for each work item, then specific UE/base station operations can be distinguished and controlled, but the complexity of UE/base station operations increases
Solution Approach 1:
The patent combines multiple separate RACH resource definitions into a unified feature combination framework. Instead of defining operations separately for each work item, the system uses a single RACH configuration that supports multiple features through a common preamble index selection mechanism, thereby reducing operational complexity while maintaining adaptability.
Solution Approach 2:
The patent creates a universal RACH configuration structure that can serve multiple work items simultaneously. The single RACH configuration supports various features (redcap, small data transmission, Msg.3 PUSCH repetition) by allowing UEs to select appropriate preamble indices based on their needs, making the system multi-functional without requiring separate definitions for each feature.
2Reliability
If multiple parameters '_featureCombinationPreambles' are configured in RACH-ConfigCommon with different repetition transmission numbers, then PRACH repetition transmission can be supported for UL coverage enhancement, but the complexity of managing multiple PRACH resources increases
Solution Approach 1:
The patent segments PRACH resources into different regions based on repetition transmission numbers. Each region is configured with a specific repetition number parameter, allowing the system to manage multiple repetition configurations through structured regional division. This segmentation enables UL coverage enhancement while maintaining manageable complexity through clear resource region boundaries.
Solution Approach 2:
The patent introduces dynamic repetition number configuration where the repetition transmission number can be adjusted based on UE requirements and RACH configuration. The system allows flexible configuration of repetition numbers in different RACH regions, enabling adaptive PRACH repetition transmission that enhances coverage while managing complexity through dynamic rather than static resource allocation.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
According to various embodiments of the present disclosure, there is provided a method of operating a user equipment (UE) in a wireless communication system. The method comprises receiving, from a base station, radio resource control (RRC) information related to a maximum repetition number of a random access (RA) preamble corresponding to a first number of times; performing a first repetition transmission of the RA preamble on the base station based on the first number of times with respect to a first RA procedure; based on the first repetition transmission of the RA preamble being performed based on the first number of times and the first RA procedure being not completed, determining a repetition transmission number of the RA preamble based on a second number of times that is greater than the first number of times; and performing a second repetition transmission of the RA preamble on the base station based on the second number of times with respect to a second RA procedure.