Multi-Carrier Scheduling With Reference-Cell FDRA Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing fragmentation of frequency resources in 5G NR technology leads to a significant increase in bit overheads and reduced transmission efficiency of downlink control information (DCI) when scheduling data for multiple cells, as extending the frequency domain resource allocation (FDRA) field to accommodate more than one cell results in excessive bit usage.
Innovation Solution
A method and apparatus that determine frequency domain resources for multiple cells by designating a reference cell and using its FDRA field to allocate resources for other cells, reducing bit overheads while maintaining scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the FDRA field is extended to schedule multiple cells simultaneously, then the scheduling capability for multiple cells is improved, but the bit overheads of the DCI are significantly increased
Solution Approach 1:
The patent segments the frequency domain resource allocation into two parts: a first frequency domain resource allocation for a first cell and a second frequency domain resource allocation for a second cell. This segmentation allows the DCI to schedule multiple cells while managing bit overheads by allocating bits proportionally to the actual resource needs of each cell, rather than using a single large allocation that would waste bits on unused resources.
Solution Approach 2:
The patent changes the parameter structure of the FDRA field by introducing separate allocation fields (first FDRA and second FDRA) with different bit lengths corresponding to the resource sizes of different cells. This parameter change enables efficient representation of multi-cell allocations by matching the bit allocation to the actual resource requirements, thereby reducing overall bit overheads while maintaining scheduling capability.
2Adaptability or versatility
If the FDRA field is extended based on related art methods, then the number of cells that can be scheduled is increased, but the transmission resources of the DCI are reduced
Solution Approach 1:
The patent divides the frequency domain resource allocation into separate segmented fields for different cells, where each field's bit length is optimized to the actual resource size of that cell. This segmentation prevents the waste of transmission resources that would occur with a single extended FDRA field, as each cell's allocation is precisely matched to its needs rather than provisioning for the maximum possible allocation across all cells.
Solution Approach 2:
The patent applies partial action by allocating frequency domain resources to only those cells that actually need scheduling, with each cell receiving a proportional share of the bit allocation. This avoids the excessive bit allocation that would result from extending the FDRA field to cover all possible cell combinations, thereby preserving transmission resources while still achieving multi-cell scheduling capability.
Data Source
AI summary
A resource determining method is performed by a terminal. The method includes: receiving downlink control information (DCI) sent by a base station, wherein the DCI is configured to schedule data transmission for a plurality of cells; determining at least frequency domain resources corresponding to a reference cell in the plurality of cells based on a frequency domain resource allocation (FDRA) field in the DCI; and determining frequency domain resources corresponding to one or more other cells in the plurality of cells at least based on the frequency domain resources corresponding to the reference cell.