Radio Frequency Allocation with Dedicated IAB Subchannels

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Solution Overview

Problem

The existing wireless communication networks ineffectively manage frequency channel allocation among Radio Units (RUs), Distributed Units (DUs), and Centralized Units (CUs, particularly in Integrated Access and Backhaul (IAB) scenarios, leading to inefficient use and increased interference.

Innovation Solution

Implementing a method where a wireless access node allocates frequency channels into UE subchannels and IAB MT subchannels, using adjacent resource blocks to minimize interference and optimize channel usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If frequency channels are allocated without dedicated IAB subchannels, then the frequency channel structure remains simple, but interference between IAB MTs and UEs increases and channel utilization becomes inefficient

Engineering Contradiction:

ImproveinterferenceVSAvoidfrequency channel allocation structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The frequency channel is segmented into distinct subchannels: UE subchannels for user equipment communications and IAB subchannels for integrated access and backhaul communications. This segmentation separates different communication functions into dedicated frequency resources, reducing interference between IAB MTs and UEs while maintaining an organized channel structure that the wireless access node can manage effectively.

Inventive Principle:

Principle #1Segmentation

2Productivity

If frequency channels are shared among IAB MTs and UEs, then the channel allocation structure remains simple, but channel utilization efficiency decreases

Engineering Contradiction:

Improvechannel utilization efficiencyVSAvoidfrequency channel allocation structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The frequency channel is divided into dedicated UE subchannels and IAB subchannels, allowing each type of communication to utilize optimized frequency resources. This segmentation enables the wireless access node to allocate resources more efficiently by matching channel characteristics to specific communication requirements, thereby improving overall channel utilization efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different subchannels are assigned different quality characteristics suited to their specific functions. UE subchannels are optimized for user equipment communications while IAB subchannels are optimized for backhaul communications. This local optimization of frequency resources according to specific communication needs enhances overall system productivity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12457625B2Radio frequency allocation among wireless user equipment and integrated access and backhaul mobile terminations

Publication Date: 2025.10.28 T MOBILE INNOVATIONS LLC

AI summary

A wireless access node serves an Integrated Access and Backhaul Mobile Termination (IAB MT). The wireless access node wirelessly receives an IAB request from the IAB MT over a frequency channel. The wireless access node determines an IAB subchannel in the frequency channel for the IAB MT responsive to the IAB request. The IAB subchannel comprises adjacent resource blocks in the frequency channel. The wireless access node wirelessly indicates the IAB subchannel to the IAB MT. The wireless access node wirelessly exchanges IAB data with the IAB MT over the IAB subchannel.