5G NR DCI Count Signaling for Accurate Uplink Feedback

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In the 5G NR system, incorrect feedback information is generated due to the terminal's inability to correctly decode downlink control information (DCI), leading to misinterpretation of the number of DCI pieces and resulting in wrong feedback, particularly in scenarios involving carrier aggregation and self-scheduling modes.

Innovation Solution

The method involves obtaining and sending downlink control information (DCI) that carries count information, including joint and single scheduling DCI, to ensure both the user and network sides have a consistent understanding of the number of DCI pieces, thereby improving feedback reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the terminal uses blind detection to decode DCI without count information, then the terminal can autonomously determine scheduling information, but the terminal may incorrectly understand the number of DCI pieces and generate wrong feedback information

Engineering Contradiction:

Improveautonomous scheduling determinationVSAvoidfeedback information accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent introduces a feedback mechanism where the network side device sends count information indicating the number of DCI pieces to the terminal. The terminal uses this count information to correctly determine the number of DCI pieces received and generate accurate feedback information, resolving the reliability issue while maintaining autonomous operation

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The count information acts as an intermediary element between the network side device and terminal. It mediates the communication by providing the terminal with the correct number of DCI pieces, enabling the terminal to accurately understand the scheduling information without compromising autonomous determination

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the network sends multiple DCI pieces for carrier aggregation scheduling, then the scheduling flexibility is improved, but the terminal's ability to correctly decode and understand the number of DCI pieces becomes more difficult

Engineering Contradiction:

Improvescheduling flexibilityVSAvoidDCI piece count detection

Core Design Contradiction:

Adaptability or versatilityVSDifficulty of detecting and measuring

Solution Approach 1:

The network side device performs preliminary action by sending count information before or with the DCI pieces. This allows the terminal to have prior knowledge of the expected number of DCI pieces, making it easier to detect and measure the correct count even when multiple DCI pieces are transmitted for carrier aggregation scheduling

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12426057B2Information transmission method and device

Publication Date: 2025.09.23 VIVO MOBILE COMM CO LTD

AI summary

An information transmission method includes: obtaining first downlink control information DCI, the first DCI carrying count information. The count information includes at least one of the following: count information of joint scheduling DCI, count information of single scheduling DCI, or joint count information of joint scheduling DCI and single scheduling DCI. The first DCI is DCI for scheduling uplink data.