DCI Response Coordination for Reliable PDCCH Signaling

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Solution Overview

Problem

Existing wireless communication systems face challenges in ensuring reliable physical downlink control channel (PDCCH) reliability and efficiency due to redundant response signaling, leading to time-domain and frequency-domain resource waste.

Innovation Solution

Implementing an architecture that coordinates multiple downlink channel information (DCI) responses by using predetermined content to schedule redundant DCIs in the same time unit and identify similarity conditions to omit redundant responses, thereby enhancing PDCCH reliability and reducing resource waste.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple DCIs are transmitted to ensure PDCCH reliability, then PDCCH reliability is improved, but redundant response signaling occurs leading to resource waste

Engineering Contradiction:

ImprovePDCCH reliabilityVSAvoidresource waste

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent merges multiple response signaling transmissions into a single coordinated response. When multiple DCIs trigger the same signaling response, the UE coordinates these responses and transmits them in the same time unit, eliminating redundant transmissions and reducing resource waste while maintaining reliability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent uses predetermined content in DCIs to pre-coordinate response timing. By including timing offset information in the DCI, the system preliminarily determines when responses should be transmitted, allowing the UE to proactively coordinate multiple responses before they are triggered, thereby avoiding redundant transmissions

Inventive Principle:

Principle #10Preliminary action

2Reliability

If multiple DCIs are transmitted to ensure PDCCH reliability, then PDCCH reliability is improved, but time-domain and frequency-domain resources are wasted

Engineering Contradiction:

ImprovePDCCH reliabilityVSAvoidtime-domain resource waste

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent combines multiple response signaling transmissions that would occur at different times into a single transmission event. By coordinating responses to multiple DCIs to occur in the same time unit, the system eliminates time-domain resource waste while ensuring the UE responds to all triggered signaling

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system preliminarily configures timing offset information in DCIs to pre-determine response transmission timing. This allows the network to plan and coordinate response timing in advance, preventing time-domain resource waste from uncoordinated redundant transmissions

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP4111772B1Architecture for signaling response coordination

Publication Date: 2026.01.07 ZTE CORP

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AI summary

User equipment (UE) may communicate with a basestation (e.g., a gNodeB) via multiple transmit-receive points. The basestation may send multiple redundant or partially redundant DCIs (downlink channel information). The redundant DCIs may trigger redundant signaling responses. The UE may access predetermined content within the DCI to determine coordination of responses such that signaling response redundancy is avoided.