IAB Node Resource Configuration in Dual Connectivity
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Solution Overview
Problem
In multi-hop integrated access and backhaul (IAB) networks, the parent backhaul link of an IAB node may not be stable due to load imbalance and link blocking, and there is no solution for performing resource configuration on the IAB node in a dual connectivity scenario.
Innovation Solution
A resource configuration method is provided to implement resource configuration of an IAB node in a dual connectivity scenario by receiving configuration information from a donor node for two parent nodes, determining resources for communication with each parent node based on the configuration information, and ensuring that these resources do not interfere with each other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual connectivity technology is introduced to improve robustness of the parent backhaul link, then reliability is improved, but device complexity increases due to the need for resource configuration management across multiple parent nodes
Solution Approach 1:
The patent segments the resource configuration by introducing separate configuration information for each parent node (first configuration information for first parent node, second configuration information for second parent node). Each configuration set independently defines resource types for the DU, allowing the IAB node to manage resources for each parent node separately while maintaining dual connectivity for improved reliability.
2Reliability
If dual connectivity with redundant links is implemented to achieve load balancing, then reliability is improved, but resource conflicts may occur between different parent nodes
Solution Approach 1:
The patent applies local quality by assigning different resource type configurations to different parent nodes. The first configuration information and second configuration information can define different resource types (hard, soft, or unavailable) for the DU at different time domains, allowing each parent node to have optimized resource allocation tailored to its specific requirements, thereby preventing resource conflicts while enabling load balancing.
3Object-generated harmful factors
If separate resource configurations are provided for each parent node, then resource conflicts are prevented, but signaling overhead from the donor node increases
Solution Approach 1:
The patent implements preliminary action by providing complete resource configuration information for both parent nodes in advance through the donor node. The first configuration information and second configuration information are configured beforehand, enabling the IAB node to proactively avoid resource conflicts by knowing the resource types for each parent node before conflicts can occur, rather than reacting to conflicts after they arise.
Data Source
AI summary
This application provides a resource configuration method and a communication apparatus. In the technical solutions of this application, a donor node may configure different DU resource configurations for an IAB node and two parent nodes of the IAB, so that the IAB node can determine MT resources for different parent nodes based on the different DU resource configurations, to implement resource configuration of the IAB node in a dual connectivity scenario.