Frequency-Domain Resource Grouping for Low-Complexity DFT
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Solution Overview
Problem
Existing uplink resource assignment methods in unlicensed frequency bands face challenges due to regulatory restrictions, limiting flexibility and spectrum utilization, particularly when the quantity of resources assigned is not a product of powers of 2, 3, and 5, which hinders low-complexity DFT implementation.
Innovation Solution
A resource assignment method that categorizes frequency domain resources into groups with quantities that are products of powers of 2, 3, and 5, allowing flexible assignment and enabling low-complexity DFT by performing DFT on individual groups separately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resource assignment is constrained to quantities that are products of powers of 2, 3, and 5 to enable low-complexity DFT, then device complexity is reduced, but adaptability and spectrum utilization deteriorate
Solution Approach 1:
The patent divides the frequency domain resources into multiple groups, where each group contains a quantity of resource units that is a product of powers of 2, 3, and 5. This segmentation allows the DFT to be performed separately on each group with low complexity, while the overall resource assignment can still achieve any total quantity by combining different groups, thus resolving the contradiction between complexity reduction and adaptability.
2Ease of manufacture
If resource assignment follows strict product-of-powers constraints, then ease of manufacture is improved, but productivity and spectrum utilization worsen
Solution Approach 1:
By segmenting resources into groups with product-of-powers quantities, the patent maintains easy DFT processing for each segment while allowing flexible combination to achieve high overall spectrum utilization. The network can assign resources dynamically by selecting appropriate combinations of groups to match actual traffic demands.
Solution Approach 2:
The patent creates a universal resource assignment framework where groups of standardized sizes can be combined in various ways to serve different service requirements. Each group type serves as a universal building block that can be allocated independently or in combination, enabling both ease of processing and high productivity.
3Productivity
If resource assignment is made flexible to improve spectrum utilization, then productivity improves, but device complexity increases due to non-standard DFT requirements
Solution Approach 1:
The patent resolves this contradiction by segmenting the frequency resources into multiple groups, each with a quantity that is a product of powers of 2, 3, and 5. This allows the terminal to perform low-complexity DFT on each group separately while achieving flexible overall resource allocation. The segmentation principle enables high spectrum utilization without increasing DFT processing complexity.
Data Source
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AI summary
This application provides a resource assignment method, a related device, and an apparatus. The method includes: receiving, by a terminal from a network device, a resource assignment indication used to indicate frequency domain resource assignment, where the resource assignment indication is used to indicate a plurality of first resource units assigned to the terminal and that the plurality of first resource units are categorized into one or more groups, where a quantity of first resource units in each group is a product of powers of 2, 3, and 5; and performing, by the terminal, discrete Fourier transform DFT based on the plurality of first resource units. According to the resource assignment method provided in this application, flexible resource assignment can be performed, and spectrum utilization can be improved.