IAB Node Resource Configuration for Interference Mitigation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring resources for integrated access and backhaul radio access network sharing, leading to conflicts and inefficiencies in network performance.
Innovation Solution
The proposed solution involves a method for resource configuration in integrated access and backhaul (IAB) radio access network sharing, where a base station transmits an indication of a resource configuration to an IAB donor CU, allowing the CU to generate a cell resource configuration that does not conflict with user equipment (UE) specific resource configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resource configuration is performed in IAB dual connection without coordination between CUs, then scheduling flexibility is improved, but interference and scheduling errors increase
Solution Approach 1:
The patent introduces an intermediary coordination mechanism between the first CU and second CU, where the network node acts as a mediator to exchange resource configuration information. This allows both CUs to maintain scheduling flexibility while coordinating resource allocation to avoid conflicts and interference, thus resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The patent implements preliminary action by having the network node transmit resource configuration information from the first CU to the second CU before actual resource allocation occurs. This advance coordination enables the second CU to configure resources that are aware of the first CU's allocations, preventing scheduling errors while maintaining flexibility in resource management.
2Reliability
If resource configuration information is exchanged between CUs, then scheduling errors are reduced, but network complexity increases
Solution Approach 1:
The patent extracts the coordination function into a dedicated network node that handles the exchange of resource configuration information between CUs. This separation of concerns reduces the complexity burden on individual CUs while maintaining reliable scheduling through centralized coordination, effectively managing the trade-off between reliability and network complexity.
3Productivity
If IAB node uses same frequency resources for access and backhaul, then spectral efficiency is improved, but interference between links increases
Solution Approach 1:
The patent applies local quality by enabling the IAB node to use the same frequency resources for both access and backhaul links (improving spectral efficiency) while the coordinating network node ensures that specific resource allocations are optimized to minimize interference. This allows frequency reuse at the local level while managing interference through coordinated resource configuration.
Data Source
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AI summary
A IAB-node is provided with two Distributed Units (DU). The first one depends from a first IAB - donor Central Unit and the second from a second Central Unit of a gNB base station. The interference in a cell served by the IAB-node and associated with the second DU is reduced by the IAB-node sending a first resource configuration of the cell to the IAB donor CU, the first resource comprising information allowing the IAB donor CU to generate a second resource configuration for the cell.