Feedback Signaling for Wireless Networks

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently handling high-frequency communications, particularly in managing large numbers of acknowledgement processes with low signaling overhead, especially in millimeter wave communication systems.

Innovation Solution

The proposed method involves a feedback radio node that transmits feedback signaling to a signaling radio node, using a control information message to schedule the transmission of acknowledgement information. This approach reduces unnecessary signaling by limiting feedback to only acknowledged subject transmissions and using dynamic bundling to reduce the size of feedback signaling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If feedback signaling transmits acknowledgement information for all subject transmissions, then reliability of feedback is improved, but signaling overhead increases

Engineering Contradiction:

Improvefeedback reliabilityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts and transmits only the necessary acknowledgement information for subject transmissions that require feedback, rather than transmitting feedback for all subject transmissions. This selective extraction reduces the quantity of feedback signaling while maintaining reliability for transmissions that need acknowledgment.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies partial action by transmitting acknowledgement information only for a subset of subject transmissions (those that require feedback) rather than for all transmissions. This partial feedback approach reduces signaling overhead while maintaining sufficient reliability for the critical transmissions.

Inventive Principle:

Principle #16Partial or excessive action

2Quantity of substance

If dynamic bundling is applied to reduce feedback signaling size, then signaling overhead is reduced, but feedback processing complexity increases

Engineering Contradiction:

Improvefeedback signaling sizeVSAvoidfeedback processing complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by performing dynamic bundling of acknowledgement information before transmission. The feedback radio node groups multiple acknowledgement bits into bundles in advance, reducing the overall feedback signaling size. This preprocessing approach manages complexity by organizing the feedback data structure before it needs to be transmitted and processed.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If beamforming is used at high frequencies, then communication reliability is improved, but system complexity increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidbeamforming complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the feedback signaling into multiple parts: subject information indicating which subject transmissions require feedback, and acknowledgement information corresponding only to those specific transmissions. This segmented approach reduces the overall feedback overhead while maintaining reliability for the segmented portions that are actually transmitted.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP4260499B1Feedback signaling for wireless communication network

Publication Date: 2025.02.05 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

There is disclosed a method of operating a feedback radio node (10) in a wireless communication network, the method comprising transmitting feedback signaling to a signaling radio node (10, 100) based on a received control information message, the received control information message comprising a range indication indicating a range of subject signalings the feedback signaling pertains to. The disclosure also pertains to related devices and methods.