5G Feedback Signaling Timing Adjustment for Interference Avoidance

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Solution Overview

Problem

In 5G radio access technology, ambiguous scheduling and transmission issues arise due to differing numerologies between carriers, leading to potential interference and misinterpretations, particularly in feedback signaling contexts.

Innovation Solution

A method is introduced where feedback signaling is configured to be transmitted on a first carrier with a specific numerology, and if the configured transmission timing overlaps with ongoing second signaling, the transmission timing is updated to a later time, avoiding interference by using different frequency resources and ensuring uninterrupted second signaling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If feedback signaling is transmitted at the configured transmission timing, then the feedback signaling follows the scheduled timing, but it may cause interference with ongoing second signaling on the same carrier

Engineering Contradiction:

Improvefeedback signaling transmission reliabilityVSAvoidsignal interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The transmission timing of feedback signaling is made dynamic rather than fixed. The system determines whether to transmit at the configured timing or to update the timing based on real-time detection of ongoing second signaling on the same carrier, allowing adaptive adjustment to avoid interference

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system implements a feedback mechanism where the transmission decision is based on detecting ongoing second signaling. The UE monitors the carrier and uses this feedback information to decide whether to transmit feedback signaling at the configured timing or to postpone transmission, creating a closed-loop control system

Inventive Principle:

Principle #23Feedback

2Object-affected harmful factors

If the transmission timing of feedback signaling is updated to avoid interference, then signal disturbance is reduced, but the transmission timing deviates from the configured schedule

Engineering Contradiction:

Improvesignal disturbanceVSAvoidtransmission timing deviation

Core Design Contradiction:

Object-affected harmful factorsVSLoss of time

Solution Approach 1:

The potential harm of timing deviation is converted into a benefit by systematically updating the timing only when necessary to avoid interference. The timing update mechanism transforms what could be seen as a scheduling error into a proactive interference avoidance strategy, improving overall system reliability

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If frequency multiplexing is used to transmit feedback signaling and second signaling on the same carrier, then resource utilization is improved, but it may cause signal interference between the two signalings

Engineering Contradiction:

Improveresource utilizationVSAvoidsignal interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system segments the transmission decision process by separating feedback signaling transmission from ongoing second signaling through timing adjustment. Instead of relying solely on frequency separation, the system divides time resources to ensure orthogonal transmission, eliminating interference while maintaining efficient frequency utilization

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3711417B1Feedback signaling processes for radio access networks

Publication Date: 2023.10.11 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

There is disclosed a method of operating a user equipment (10) in a radio access network, the user equipment (10) being configured with a feedback configuration of transmission of feedback signaling by the user equipment (10). The feedback signaling pertains to subject transmission. The feedback configuration indicates transmission of feedback signaling on a first carrier with a first numerology and according to a configured transmission timing. The method comprises transmitting the feedback signaling at an updated transmission timing which is later in time than the configured transmission timing if the configured transmission timing is within a signaling time interval of transmission, by the user equipment (10), of second signaling on the first carrier. The disclosure also pertains to related methods and devices.