IAB Node Resource Management via Multi-Dimensional Multiplexing
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Solution Overview
Problem
Current resource management techniques for integrated access and backhaul (IAB) nodes in wireless communication systems, particularly those supporting time division multiplexing (TDM) and multiplexing schemes allowing simultaneous transmissions, face challenges in efficiently allocating radio resources to enhance communication performance, coverage, and capacity.
Innovation Solution
A resource management method involving higher and physical layer signaling signals to configure IAB nodes, allowing IAB-mobile terminals (MT) and distributed units (DU) to perform communications using time, frequency, or spatial division schemes, with specific configurations for communication directions and resource availability indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If TDM scheme is used for resource allocation in IAB node, then resource allocation simplicity is improved, but communication capacity and efficiency deteriorate due to inability to support simultaneous transmissions
Solution Approach 1:
The IAB node is segmented into two functional elements: IAB-MT (mobile terminal) and IAB-DU (distributed unit). This segmentation allows independent resource allocation and multiplexing schemes to be applied to each element, enabling simultaneous transmissions while maintaining manageable complexity through separate control mechanisms for each segment.
Solution Approach 2:
The patent transitions from single-dimension TDM (time-only) multiplexing to multi-dimensional multiplexing by introducing frequency division (FDM) and spatial division (SDM) dimensions. This allows IAB-MT and IAB-DU to operate simultaneously in different frequency resources or spatial directions, dramatically increasing communication capacity while maintaining resource allocation manageability.
2Productivity
If multiplexing scheme allowing simultaneous transmissions is used in IAB node, then communication capacity is improved, but resource allocation complexity deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the upper node can flexibly configure and switch between different multiplexing schemes (TDM, FDM, SDM) based on real-time communication conditions, traffic demands, and channel states. This dynamic adaptability allows the system to optimize communication capacity while managing complexity through intelligent, condition-based scheme selection rather than fixed complex allocation.
Solution Approach 2:
The upper node acts as an intermediary that manages the complexity of multi-dimensional resource allocation. It receives communication requirements, determines appropriate multiplexing schemes, and allocates resources to IAB-MT and IAB-DU accordingly. This intermediary approach centralizes the complex decision-making process, shielding individual IAB nodes from managing the full complexity while enabling high-capacity simultaneous transmissions.
3Device complexity
If fixed resource configuration is used for IAB-MT and IAB-DU, then resource allocation simplicity is improved, but communication efficiency deteriorates due to inability to adapt to varying communication conditions
Solution Approach 1:
The patent implements dynamic resource configuration where the upper node receives feedback about communication conditions (channel quality, traffic load, interference levels) and adjusts the multiplexing scheme and resource allocation for IAB-MT and IAB-DU in real-time. This transforms fixed static allocation into flexible dynamic allocation, enabling the system to adapt to varying communication conditions and optimize efficiency while maintaining manageable complexity through automated adaptation.
Data Source
AI summary
A resource management method carried out by an integrated access and backhaul (IAB) node in a communication system, according to one embodiment of the present invention, may comprise the steps of: receiving, from an upper-level node of an IAB node, a first upper layer signaling signal for resource configuration of the IAB node; receiving, from the upper-level node of the IAB node, a second upper layer signaling signal for resource configuration of the IAB node; and, on the basis of the first and second upper layer signaling signals, determining that an IAB-mobile terminal (IAB-MT) and an IAB-distributed unit (IAB-DU) constituting the IAB node carry out communication by being multiplexed by any one scheme among time division, frequency division and spatial division.