IAB Resource Indication for Dense-Node Interference Control

Solution Overview

Problem

The increasing deployment density of IAB nodes leads to significant interference issues, affecting network performance and spectrum efficiency in mobile communication systems.

Innovation Solution

A resource indication method is implemented to limit the transmission of signals by IAB nodes on specific resources, using indication information to avoid interference, including power control, spatial and temporal resource allocation, and quasi co-location relationships to manage signal transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If IAB nodes are densely deployed to improve spectrum utilization, then spectrum efficiency is improved, but mutual interference between IAB nodes increases

Engineering Contradiction:

Improvespectrum efficiencyVSAvoidmutual interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by having the first IAB node transmit a first reference signal before the second IAB node transmits its signal. The network side device uses this preliminary reference signal to obtain first interference information about the interference the second IAB node will cause to the first IAB node, enabling proactive interference management rather than reactive correction.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by having the second IAB node transmit second reference signals in response to first indication information from the network side device. The network side device uses these second reference signals to obtain second interference information, creating a closed-loop feedback mechanism for continuous interference management and optimization.

Inventive Principle:

Principle #23Feedback

2Ease of manufacture

If IAB nodes are densely deployed to reduce deployment costs, then deployment cost is reduced, but mutual interference between IAB nodes increases

Engineering Contradiction:

Improvedeployment costVSAvoidmutual interference

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by having the first IAB node transmit a first reference signal before the second IAB node transmits its signal. The network side device uses this preliminary reference signal to obtain first interference information about the interference the second IAB node will cause to the first IAB node, enabling proactive interference management rather than reactive correction.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by having the second IAB node transmit second reference signals in response to first indication information from the network side device. The network side device uses these second reference signals to obtain second interference information, creating a closed-loop feedback mechanism for continuous interference management and optimization.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12513697B2Resource indication method and communication apparatus

Publication Date: 2025.12.30 HUAWEI TECH CO LTD

AI summary

A resource indication method and a communication apparatus, where the method includes: The second node receives first indication information from the first node, where the first indication information includes first resource information, and the first resource information is associated with a first reference signal. The second node determines the first resource information based on the first indication information, where the first resource information is for limiting sending of a to-be-sent signal on a first resource indicated by the first resource information.