Type-2 Random Access PUSCH Mapping for RedCap Terminals
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Solution Overview
Problem
Existing solutions fail to effectively map preamble sets of RedCap terminals to PUSCH resource sets during type-2 random access procedures in wireless communication systems, leading to incorrect reception of PUSCH by the network device.
Innovation Solution
The network device separately maps first and second preamble sets corresponding to first and second-type terminals, respectively, to first and second PUSCH resource sets, ensuring accurate mapping and reception in type-2 random access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single PUSCH resource set is shared by both first-type terminals and second-type terminals (RedCap terminals), then resource utilization is improved, but mapping accuracy deteriorates leading to incorrect reception
Solution Approach 1:
The patent divides the single PUSCH resource set into separate PUSCH resource sets for first-type terminals and second-type terminals (RedCap terminals). This segmentation ensures that each terminal type has dedicated mapping relationships between preamble sets and PUSCH resources, eliminating mapping conflicts and ensuring accurate reception while maintaining efficient resource utilization through independent optimization for each terminal type.
2Manufacturing precision
If separate PUSCH resource sets are allocated for first-type terminals and second-type terminals, then mapping accuracy is improved, but resource utilization deteriorates due to duplication
Solution Approach 1:
The patent applies different mapping configurations and parameters for first-type terminals and second-type terminals within the same random access procedure. By tailoring the PUSCH resource set characteristics (such as time-frequency resources, modulation schemes, and coding rates) to the specific requirements of each terminal type, the system achieves accurate mapping for both types without unnecessary resource duplication, as each set is optimized for its target terminal category.
3Device complexity
If conventional mapping methods are used for RedCap terminals, then device complexity is reduced, but reliability deteriorates due to incorrect PUSCH reception
Solution Approach 1:
The patent pre-configures dedicated PUSCH resource sets and establishes explicit mapping relationships between preamble sets and PUSCH resources for second-type terminals (RedCap terminals) before the random access procedure begins. This preliminary configuration ensures that RedCap terminals can reliably determine their PUSCH resources without complex runtime calculations, maintaining low device complexity while ensuring correct PUSCH reception and high random access success rate.
Data Source
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AI summary
A method and an apparatus for random access resource determination, a network device, and a storage medium are provided in the disclosure, and the disclosure relates to the field of wireless communication. The method is applied to a network device, and 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.