IAB Node FDM SDM Multiplexing for Interference Reduction
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Solution Overview
Problem
Current 5G mobile communication systems face challenges in efficiently multiplexing resources between the Distributed Unit (DU) and Mobile Termination (MT) of an Integrated Access and Backhaul (IAB) node, leading to interference and reduced data transmission/reception efficiency.
Innovation Solution
The method involves transmitting Frequency Division Multiplexing (FDM)-related or Spatial Division Multiplexing (SDM)-related information between the IAB donor node and the IAB node, allowing for the multiplexing of backhaul and access data using FDM or SDM, thereby reducing interference between the DU and MT resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources of DU and MT are multiplexed without FDM or SDM, then device complexity is reduced, but transmission/reception efficiency deteriorates due to interference
Solution Approach 1:
The patent applies parameter changes by introducing FDM-related information and SDM-related information to change the resource allocation parameters. Specifically, it configures whether DU and MT resources are multiplexed using FDM or SDM, and adjusts frequency domain parameters (frequency offset, subcarrier spacing) and spatial parameters (beam directions, spatial filters) to resolve the contradiction between transmission efficiency and device complexity.
2Productivity
If FDM is used to multiplex DU and MT resources, then transmission efficiency is improved, but harmful interference increases between simultaneous transmissions
Solution Approach 1:
The patent applies local quality by making different parts of the frequency spectrum have different properties. It configures frequency offset and subcarrier spacing parameters specifically for the FDM multiplexing of DU and MT resources, creating localized frequency separation that allows simultaneous transmission while minimizing interference through precise frequency domain positioning.
3Productivity
If SDM is used to multiplex DU and MT resources, then transmission efficiency is improved, but spatial resource management complexity increases
Solution Approach 1:
The patent applies parameter changes by introducing spatial parameters including beam directions, spatial filters, and spatial resource indicators for SDM multiplexing. These parameter changes enable the system to manage spatial resources efficiently by configuring distinct spatial characteristics for DU and MT transmissions, resolving the contradiction between transmission efficiency and spatial management complexity.
Data Source
AI summary
The disclosure relates to a 5th Generation (5G) or 6th Generation (6G) communication system for supporting a higher data transmission rate. A method of operating an Integrated Access and Backhaul (IAB) donor node in a wireless communication system is provided. The method includes transmitting Frequency Division Multiplexing (FDM)-related information or Spatial Division Multiplexing (SDM)-related information to an IAB node, receiving necessary information from the IAB node, and transmitting or receiving backhaul data with respect to the IAB node by applying the FDM or the SMD, based on the FDM-related information or the SMD-related information.