Wireless Communication Apparatus Flexible Frequency Scheduling DFT Scale
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Solution Overview
Problem
In LTE-A uplink, the number of resource blocks assigned to terminals is restricted to multiples of P, limiting flexible resource assignment and deteriorating frequency scheduling effects, as only numbers represented by 2^n×3^m×5^l can be assigned, leading to increased DFT circuit scale when non-representable numbers are set.
Innovation Solution
A radio communication apparatus and method that receive resource assignment information, set and select resource blocks for actual transmission bands corresponding to numbers represented by 2^n×3^m×5^l, allowing flexible frequency scheduling without increasing the DFT circuit scale by converting non-representable numbers into representable ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the number of resource blocks is restricted to multiples of P and representable by 2^n×3^m×5^l, then the DFT circuit scale is reduced, but the resource assignment flexibility is limited and frequency scheduling effect is deteriorated
Solution Approach 1:
The system segments resource blocks into two categories: those that can be represented by 2^n×3^m×5^l (first number of RBs) and those that cannot (second number of RBs). This segmentation allows the patent to apply different handling methods to different RB types, enabling flexible resource assignment while maintaining DFT circuit efficiency for the majority of cases.
Solution Approach 2:
The patent changes the parameter representation method for resource block numbers. Instead of strictly requiring all RB counts to be representable by 2^n×3^m×5^l, the system allows RB counts to be represented by other formulas (such as a×2^n×3^m×5^l where a is a positive integer), thereby expanding the range of assignable resource blocks without significantly increasing DFT circuit complexity.
2Adaptability or versatility
If non-representable numbers of resource blocks are assigned, then resource assignment flexibility is improved, but the DFT circuit scale increases
Solution Approach 1:
The patent modifies the parameter constraints for resource block assignment by allowing RB counts to be represented by a×2^n×3^m×5^l where a is a positive integer. This parameter change enables the assignment of non-representable numbers (like 7, 13, 19) while keeping the DFT circuit scale increase minimal, as the base structure 2^n×3^m×5^l is preserved.
Solution Approach 2:
The system dynamically adjusts the resource block assignment strategy based on the specific RB count required. When non-representable numbers are needed for flexibility, the system accommodates them with minimal DFT circuit scale increase, rather than strictly enforcing the 2^n×3^m×5^l constraint in all cases.
Data Source
AI summary
Disclosed is a wireless communication apparatus and wireless communication method wherein flexible frequency scheduling is performed without increasing the scale of the DFT (Discrete Fourier Transform) circuitry. For example, when resource allocation information is reported indicating whether or not a resource has been allocated to each of a plurality of RBGs (RB groups) into which the system bandwidth is divided, as in Type 0 allocation, if the number of reported RBs reported by the resource allocation information cannot be expressed as “2^n×3^m×5^l”, an allocated RB number setting section (208) sets the number of allocated resource blocks used in the actual transmission band, corresponding to the reported RB number, to the number of resource blocks that can be represented by any of “2^n×3^m×5^l”, and an allocated RB selection section (209); selects the allocated RB employed in the actual transmission band from the resource allocation information and allocated RB number.