IAB-DU Resource Block Sets Using Reference Carrier Positions

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Solution Overview

Problem

Determining resource block sets for Integrated Access and Backhaul Nodes (IAB Nodes) is challenging due to the need to avoid resource conflicts and improve communication efficiency, particularly in scenarios where multiple carriers are configured for IAB-DU cells.

Innovation Solution

A method for determining resource block sets based on resource configuration information, including the position of reference resource blocks or carriers, to establish a start frequency position, thereby avoiding conflicts and optimizing communication efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple RB sets are configured for IAB-DU cell with multiple carriers, then resource allocation flexibility is improved, but determining the reference carrier and start frequency position becomes complex

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidRB set determination complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The CU configures the IAB-DU with resource configuration information in advance, including the position of reference RB or carrier. This preliminary configuration allows the IAB-DU to determine the start frequency position without complex real-time calculations, resolving the contradiction between flexible resource allocation and determination complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces a reference RB or reference carrier as an intermediary element. The CU configures the position of this reference, and the IAB-DU uses it as a baseline to determine start frequency positions for multiple RB sets. This intermediary simplifies the determination process while maintaining flexibility in resource allocation across multiple carriers.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If resource configuration information includes position of reference RB or carrier, then RB set determination accuracy is improved, but information processing overhead increases

Engineering Contradiction:

ImproveRB set determination accuracyVSAvoidconfiguration information overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

Instead of providing complete frequency position information for all RB sets, the patent applies local quality by configuring only the position of a reference RB or reference carrier. The IAB-DU then locally determines the start frequency positions of individual RB sets based on this reference, reducing configuration overhead while maintaining determination accuracy.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the parameter representation from absolute frequency positions for all RB sets to a relative parameter system where only the reference RB/carrier position is configured. The actual RB set positions are derived by applying offsets or calculations based on this reference, reducing the quantity of configuration information while preserving accuracy.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250338263A1Resource block set determination method, communication node, and storage medium

Publication Date: 2025.10.30 ZTE CORP

AI summary

A resource block set (RB set) determination method includes: determining resource configuration information, where the resource configuration information includes at least one of the position of a reference resource block (RB) or the position of at least one carrier; determining a start frequency position according to the resource configuration information; and determining an RB set according to the start frequency position.