Multi-Cell FDRA Scheduling With Subband-Based DCI Bit Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing fragmentation of frequency resources in 5G NR technology leads to a significant increase in bit overhead and reduced transmission efficiency of downlink control information (DCI) when scheduling data for multiple cells, as simple expansion of the frequency domain resource allocation (FDRA) field is required for multi-cell scheduling.
Innovation Solution
A method and apparatus that determine subband parameter values for each cell within a frequency domain resource range, allowing efficient allocation of frequency domain resources based on the FDRA field in DCI, reducing bit overhead while maintaining scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If simple expansion of the frequency domain resource allocation (FDRA) field is performed for multi-cell scheduling, then scheduling capability for multiple cells is improved, but the number of bits occupied by the FDRA field increases significantly, leading to increased DCI bit overhead and reduced transmission efficiency
Solution Approach 1:
The patent segments the frequency domain resource allocation into two parts: a first part indicating a first resource and a second part indicating a second resource. This segmentation allows the FDRA field to be divided into multiple fields (first FDRA field and second FDRA field), each handling a portion of the scheduling information. By dividing the allocation indication into segments, the patent achieves multi-cell scheduling capability while controlling the bit overhead through efficient use of each segment's bits.
Solution Approach 2:
The patent introduces a resource indication field that provides additional dimensionality to the resource allocation mechanism. Instead of simply expanding the FDRA field bits, the patent adds a new field that indicates resource allocation in a different dimensional space, allowing multi-cell scheduling without proportionally increasing the bit overhead in the original FDRA field dimension.
2Adaptability or versatility
If the FDRA field is expanded to schedule multiple cells, then multi-cell scheduling capability is improved, but the transmission resource of the DCI is reduced due to increased bit overhead
Solution Approach 1:
The patent segments the resource allocation indication into multiple fields with specific bit allocations. The first FDRA field uses a first number of bits and the second FDRA field uses a second number of bits, with the total bits kept manageable. This segmentation approach enables multi-cell scheduling while maintaining DCI transmission efficiency by distributing the bit requirement across multiple optimized fields rather than expanding a single field.
Solution Approach 2:
The patent changes the parameter structure of the resource allocation by introducing different field types (first FDRA field, second FDRA field, resource indication field) with different bit lengths and allocation strategies. This parameter change allows the system to represent multi-cell scheduling information with optimized bit usage, maintaining transmission efficiency while achieving the desired scheduling capability.
Data Source
AI summary
A resource determination method is performed by a terminal and includes: receiving downlink control information (DCI) sent by a base station; wherein the DCI is configured to schedule data transmission of a plurality of cells; determining a subband parameter value of a first cell allocated within a frequency domain resource range, wherein the first cell is any one of the plurality of cells; and determining a frequency domain resource for data transmission of the first cell based on an indication value of a frequency domain resource allocation (FDRA) field in the DCI and the subband parameter value of the first cell.