PRACH Resource Block Mapping for Mixed PUSCH Subcarrier Spacing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing technologies face challenges in efficiently determining and allocating resource blocks for the random access preamble (NRBRA) and PRACH frequency position parameter (k) in wireless communication systems, particularly when the subcarrier spacing for PUSCH and PRACH exceeds 120 KHz, leading to inefficiencies in resource allocation.
Innovation Solution
A system and method for allocating resource blocks to the random access preamble based on specific formulas involving NRBRA and k, considering parameters such as LRA, Δf, ΔfRA, and M, to optimize resource block allocation for PRACH, ensuring efficient use of bandwidth and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subcarrier spacing for PUSCH and PRACH exceeds 120 KHz, then communication efficiency is improved, but resource block allocation becomes complex and interference increases
Solution Approach 1:
The patent applies parameter changes by establishing specific relationships between subcarrier spacing values (Δf and ΔfRA) and resource block allocation parameters (NRBRA and k). Different subcarrier spacing combinations (120 KHz, 240 KHz, 480 KHz, 960 KHz) are mapped to specific resource block allocation formulas, allowing the system to adapt resource allocation based on the selected subcarrier spacing parameter while maintaining manageable complexity through standardized mapping rules.
2Productivity
If subcarrier spacing for PUSCH and PRACH exceeds 120 KHz, then communication efficiency is improved, but interference between channels increases
Solution Approach 1:
The patent applies local quality by ensuring that resource blocks allocated to PRACH and PUSCH do not overlap in the frequency domain. By carefully selecting and constraining the resource block allocation parameters (NRBRA and k) based on subcarrier spacing, the patent creates localized separation between PRACH and PUSCH resources, preventing interference while allowing each channel to operate with optimized subcarrier spacing for its specific function.
3Ease of manufacture
If resource blocks are allocated using traditional methods, then allocation simplicity is maintained, but bandwidth utilization becomes inefficient
Solution Approach 1:
The patent applies dynamics by making resource block allocation adaptive to different subcarrier spacing configurations. Rather than using fixed allocation methods, the patent dynamically adjusts the resource block allocation parameters (NRBRA and k) based on the selected subcarrier spacing values for PUSCH and PRACH, allowing the system to optimize bandwidth utilization for each specific configuration while maintaining standardized allocation rules.
Data Source
AI summary
Systems, methods and devices for establishing combinations of PUSCH subcarrier spacing and PRACH subcarrier spacing may include a wireless communication device determining a number of resource blocks to be occupied by a random access (RA) preamble and a PRACH frequency position parameter. The wireless communication device may allocate the resource blocks to the RA preamble according to the number of resource blocks to be occupied by the RA preamble and the PRACH frequency position parameter. The wireless communication device may transmit the RA preamble to a wireless communication node according to the allocated resource blocks.