IAB Donor CU Resource Coordination for Interference Mitigation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing resource configurations across integrated access and backhaul radio access network sharing, leading to interference and reduced network performance due to conflicting resource allocations between cells.
Innovation Solution
A method where a first integrated access and backhaul donor central unit receives an indication of a distributed unit cell resource configuration from a first IAB node and transmits a second DU cell resource configuration to a second IAB node, based on the first configuration and a multiplexing constraint, to ensure non-conflicting resource availability for both cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple IAB donor CUs independently configure DU cell resources for their respective cells, then each cell can be optimized for its own performance, but interference occurs and network performance decreases due to conflicting resource allocations
Solution Approach 1:
The patent merges the resource configuration authority of multiple IAB donor CUs by introducing a coordinating entity that consolidates resource allocation decisions. This coordinating entity receives resource configuration requests from multiple CUs, harmonizes them based on multiplexing constraints, and distributes coordinated configurations back to the CUs, thereby eliminating interfering resource allocations while maintaining individual cell optimization goals
Solution Approach 2:
The patent introduces a coordinating entity as an intermediary between multiple IAB donor CUs. This intermediary receives resource configuration information from different CUs, applies multiplexing constraint analysis, and generates coordinated resource configurations that prevent interference. The intermediary acts as a mediator that reconciles conflicting resource allocation decisions without requiring direct modification of each CU's independent configuration process
2Reliability
If resource configurations are coordinated across multiple IAB donor CUs to avoid interference, then network performance improves, but system complexity increases due to additional coordination mechanisms
Solution Approach 1:
The patent segments the resource coordination function into distinct modular components: a coordinating entity that handles high-level resource harmonization, and individual IAB donor CUs that maintain their local configuration capabilities. This segmentation allows coordination functionality to be added without fundamentally redesigning existing CU architectures, thereby managing system complexity through functional decomposition
Solution Approach 2:
The coordinating entity is designed as a universal component that can handle resource coordination for multiple different IAB donor CUs simultaneously. By creating a multi-functional coordinator that serves multiple CUs through standardized interfaces and protocols, the system achieves interference coordination benefits without proportionally increasing complexity for each individual CU-coordinator pair
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first integrated access and backhaul (IAB) donor central unit (CU) may receive, from a first IAB node, an indication of a first distributed unit (DU) cell resource configuration for communications corresponding to a first cell that is associated with a second IAB donor CU. The IAB donor CU may transmit, to a second IAB node, an indication of a second DU cell resource configuration for communications corresponding to a second cell, wherein the second DU cell resource configuration is based at least in part on the first DU cell resource configuration and a multiplexing constraint associated with communications corresponding to the first cell and communications corresponding to the second cell. Numerous other aspects are described.