Downlink Control Information FDRA Segmentation for Multi-Channel Scheduling

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In ultra-reliable and low-latency communication (URLLC) systems, the existing frequency domain resource assignment (FDRA) methods for downlink control information (DCI) face challenges in efficiently scheduling multiple data channels across multiple cells, particularly due to large bitmap sizes and limited frequency diversity, which affects reliability and efficiency.

Innovation Solution

A method for receiving downlink control information (DCI) that includes an FDRA indication field to schedule N data channels, where N is a positive integer, allowing for efficient frequency domain resource allocation by using FDRA sub-fields or bit sequences to indicate resource information for each channel, optimizing the FDRA indication field based on semi-static configuration or predefined protocols.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a single DCI schedules multiple data channels across multiple cells, then scheduling efficiency is improved, but the FDRA indication field size increases due to large bitmap sizes

Engineering Contradiction:

Improvescheduling efficiencyVSAvoidFDRA indication field size

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent segments the FDRA indication field into multiple parts: a first FDRA indication field for indicating frequency domain resources of a first data channel, and a second FDRA indication field for indicating frequency domain resources of a second data channel. This segmentation allows each field to be optimized independently, reducing the total information overhead while supporting multi-cell scheduling

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a dimension of differentiation by applying different indication methods to different data channels: resource indication values (RIV) for the first data channel and bitmaps for the second data channel. This dimensional change in indication strategy allows efficient resource allocation while controlling field sizes

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If large bitmap sizes are used for FDRA indication, then frequency domain resource allocation flexibility is improved, but frequency diversity is limited

Engineering Contradiction:

Improvefrequency domain resource allocation flexibilityVSAvoidfrequency diversity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies different quality characteristics to different parts of the resource allocation: RIV-based indication for the first data channel provides compact representation, while bitmap-based indication for the second data channel provides fine-grained flexibility. This local quality differentiation maintains overall system flexibility while improving reliability through diverse indication methods

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250267680A1Method for receiving downlink control information, terminal device, and network device

Publication Date: 2025.08.21 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided is a method for receiving downlink control information (DCI). The method is applicable to a terminal device, and includes: receiving first DCI, wherein the first DCI is used to schedule N data channels and includes a frequency domain resource assignment (FDRA) indication field, wherein the FDRA indication field indicates frequency domain resource information corresponding to the N data channels, and N is a positive integer.