NR Random Access Preamble Mapping for RedCap PUSCH Reception
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Solution Overview
Problem
Existing solutions fail to effectively map preamble sets of reduced-capability (RedCap) terminals to PUSCH resource sets during type-2 random access procedures in new radio (NR) systems, leading to incorrect reception of PUSCH by network devices.
Innovation Solution
The method involves mapping separate preamble sets for different types of terminals, including RedCap terminals, to distinct PUSCH resource sets, ensuring that each set conforms to the network's determined mapping, thereby facilitating correct reception of messages in type-2 random access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a unified preamble set is mapped to a PUSCH resource set for all terminal types, then resource utilization is simplified, but mapping inconsistencies occur for RedCap terminals causing PUSCH reception errors
Solution Approach 1:
The patent segments the unified preamble set into terminal-specific preamble sets (first terminal type and second terminal type). Each preamble set is independently mapped to appropriate PUSCH resources, ensuring that RedCap terminals and conventional terminals use separate mapping relationships. This segmentation resolves the mapping inconsistency problem while maintaining efficient resource utilization through dedicated resource pools for each terminal category.
2Manufacturing precision
If separate preamble sets are configured for different terminal types, then mapping accuracy for RedCap terminals is improved, but system complexity increases
Solution Approach 1:
The patent implements a universal mapping framework that handles multiple terminal types through a unified procedure. The network device configures terminal-specific parameters (first parameter for first-type terminals, second parameter for second-type terminals) within the same type-2 random access procedure structure. This universal approach enables accurate mapping for both RedCap and conventional terminals without requiring separate random access procedures, thereby reducing system complexity while maintaining high mapping accuracy.
Data Source
AI summary
A method for random access resource determination, a network device, and a storage medium are provided. The method includes the following. A first preamble set is mapped to a first physical uplink shared channel (PUSCH) resource set in a first mapping manner, where the first preamble set belongs to a first random access channel occasion (RO) set, and the first preamble set or the first RO set is used for a random access procedure of a first-type terminal. A second preamble set is mapped to a second PUSCH resource set in a second mapping manner, where the second preamble set belongs to a second RO set, and the second preamble set or the second RO set is used for a random access procedure of a second-type terminal. The random access procedure is a type-2 random access procedure.