IAB Node Resource Allocation for Access Backhaul Interference
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Solution Overview
Problem
In next-generation wireless communication systems, there is a need for flexible resource allocation methods that can effectively manage both access and backhaul links in integrated access and backhaul (IAB) environments, where traditional methods struggle to minimize interference and ensure stable performance.
Innovation Solution
A node operation method that involves connecting to a parent node through an initial access process, receiving allocation information for both parent and child nodes, and using specific resources for communication based on the received information, where the resource type and availability are determined by both allocation types, allowing for flexible transmission direction management and reducing ambiguity in resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a node uses the same radio resource for both access link and backhaul link in IAB environment, then resource utilization efficiency is improved, but interference between access and backhaul communications increases
Solution Approach 1:
The patent implements dynamic resource allocation where the node can flexibly switch between using dedicated resources for access link, dedicated resources for backhaul link, or shared resources based on current traffic conditions and interference levels. This dynamic adjustment allows the system to optimize resource utilization efficiency while controlling interference through adaptive resource selection and configuration.
2Object-affected harmful factors
If a node allocates dedicated resources for access link and backhaul link separately, then interference between links is reduced, but resource allocation complexity and device complexity increase
Solution Approach 1:
The patent creates a universal resource allocation framework where the same resource pool can serve multiple purposes - acting as access link resources, backhaul link resources, or shared resources depending on configuration. This multi-functional approach reduces the need for completely separate resource pools while maintaining interference management through flexible resource assignment and node configuration.
3Productivity
If a node uses flexible resource sharing between access and backhaul links, then resource utilization efficiency is improved, but ambiguity in resource usage and scheduling difficulty increase
Solution Approach 1:
The patent implements feedback mechanisms where the node reports resource usage status, interference levels, and scheduling information to the parent node and child nodes. This feedback enables coordinated resource management, clears ambiguities about resource usage through explicit signaling, and allows dynamic adjustment of resource allocation based on actual system conditions and performance metrics.
Data Source
AI summary
Provided are a method of operating a node in a wireless communication system and a device using the same. The method includes: connecting to a parent node through an initial access process; receiving, from the parent node, first allocation information related with communication with the parent node and second allocation information related with communication with a child node; and communicating with the parent node or the child node using a specific resource based on the first allocation information and the second allocation information. When the second allocation information indicates the specific resource as a hard resource that is always available for communication with the child node, the specific resource is used for communication with the child node regardless of the first allocation information.