NR-U Uplink Resource Allocation for Lower DFT/IDFT Complexity
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Solution Overview
Problem
Existing methods for transmitting and receiving signals in the unlicensed band of the 5G communication system, such as NR-U, are not sufficiently studied, leading to inefficiencies and increased computational load due to prime factors in resource allocation.
Innovation Solution
The mobile station and base station employ control circuitry to manage resource allocation by ensuring that the number of resources used does not include specific prime factors, such as 2, 3, and 5, thereby optimizing the allocation and reducing computational load through techniques like DFT and IDFT processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resource allocation includes prime factors (2, 3, 5) in the number of resources, then resource utilization flexibility is improved, but computational load increases due to DFT/IDFT processes
Solution Approach 1:
The patent changes the parameter of resource allocation by excluding specific prime factors (2, 3, 5) from the number of resources allocated to uplink signals. This parameter modification directly reduces computational load in DFT/IDFT processes while maintaining resource allocation flexibility through alternative configurations.
Solution Approach 2:
The patent segments the frequency band into multiple bands with specific spacing, and allocates resources in a controlled manner to ensure the number of resources does not include problematic prime factors. This segmentation approach allows flexible resource distribution while avoiding computational complexity.
2Device complexity
If the number of resources is constrained to exclude specific prime factors, then computational load is reduced, but resource allocation flexibility is limited
Solution Approach 1:
The patent introduces a new dimension of control by specifying spacing between bands in the frequency domain. This additional dimensional constraint (spacing requirement) allows the system to maintain resource allocation flexibility through spatial arrangement rather than relying solely on the number of resources, thereby avoiding problematic prime factors without sacrificing adaptability.
3Quantity of substance
If signals are transmitted using resources with prime factors, then resource utilization is maximized, but signal transmission reliability decreases due to computational errors
Solution Approach 1:
The patent modifies the resource allocation parameters by excluding specific prime factors from the number of resources. This parameter change reduces computational errors in DFT/IDFT processes, thereby improving signal transmission reliability while maintaining adequate resource utilization through alternative resource configurations.
Data Source
AI summary
In an operation in a license-exempt band (unlicensed band), the present invention contributes to the provision of a mobile station, a base station, a transmission method and a receiving method which suitably transmit and receive a signal. The mobile station 200 includes: a transmission unit 205 which transmits an uplink signal; and a control unit 201 which, when a first number indicating a first resource amount that can be used in the transmission of the uplink signal includes a third number, which is different from a specific second number, as a prime factor, controls the transmission of a signal of a fourth number that does not include the third number as the prime factor by using a second resource.