IAB Resource Allocation via Not-Available Link Configuration
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Solution Overview
Problem
Current integrated access and backhaul (IAB) systems lack flexibility in resource allocation, as they only support per-cell resource configuration, leading to inefficiencies in network resource utilization and potential interference due to unawareness of not-available resources by child nodes.
Innovation Solution
Implementing a method where a central unit determines and communicates the configuration of not-available resources for parent nodes to child nodes, allowing for per-child link resource configuration, which enables the child nodes to avoid using unavailable resources and improve scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If per-cell resource configuration is used in IAB systems, then device complexity is reduced and ease of operation is improved, but network resource utilization efficiency deteriorates and interference increases due to lack of awareness of not-available resources
Solution Approach 1:
The patent segments the resource configuration from cell-level to link-level granularity. Instead of configuring resources uniformly across entire cells, the system divides resources into specific links between parent and child nodes. This segmentation allows precise control of not-available resources per link while maintaining overall system manageability through hierarchical configuration (CU configures DUs, which then configure their child nodes).
Solution Approach 2:
The patent applies local quality by allowing different resource configurations for different links within the IAB network. Each parent-child link can have its own specific not-available resource patterns based on local traffic demands and interference conditions, rather than applying a uniform cell-level configuration. This enables optimized resource allocation tailored to each link's specific requirements.
2Use of energy by moving object
If per-cell resource configuration is used, then configuration management is simplified, but power consumption increases and interference occurs because child nodes cannot avoid not-available resources
Solution Approach 1:
The patent implements preliminary action by having the CU pre-configure not-available resource patterns in the child DU resource configuration messages before child nodes attempt transmission. Child nodes receive advance notice of which time-frequency resources are not-available on their links to parent nodes, allowing them to proactively avoid these resources and prevent wasted power consumption on unsuccessful transmissions.
Solution Approach 2:
The system establishes a feedback mechanism where the CU monitors network conditions and dynamically adjusts not-available resource configurations, which are then communicated to child nodes. This feedback loop enables the network to adapt to changing traffic patterns and interference conditions, optimizing power efficiency while maintaining manageable configuration complexity through centralized control.
Data Source
AI summary
Aspects described herein relate to resource allocation in an integrated access and backhaul (IAB) system. In an example, the aspects include determining, by a central unit (CU), a configuration of not-available (NA) resources for a parent node, wherein the NA resources of the parent node correspond to a set of one or more resources configured at the parent distributed unit (DU) as being unavailable for uplink and downlink communications between the parent DU and a child node; and modifying, by the CU, the first child DU resource configuration to create a modified child DU resource configuration.