IAB Wireless Node Periodic Resource Coordination
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Solution Overview
Problem
In integrated access and backhaul (IAB) networks, coordinating periodic resources between a mobile termination (MT) component and a distributed unit (DU) component to meet strict latency requirements for time-sensitive communication traffic is challenging due to independent allocation by parent and child nodes, leading to potential misalignment and increased latency.
Innovation Solution
A wireless node is configured to receive an indication of periodic resources with associated parameters or a priority flag, allowing it to modify and coordinate resource allocations between the MT and DU components, ensuring alignment and reducing latency by optimizing resource locations across multiple hops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If periodic resources are allocated independently by parent and child nodes, then resource allocation flexibility is improved, but resource coordination alignment deteriorates
Solution Approach 1:
The patent applies preliminary action by having the mobile termination component determine periodic resource parameters in advance based on resource allocations from the parent node, before the distributed unit component performs its own resource determination. This pre-determination ensures that both components work with aligned resource parameters, resolving the coordination alignment issue while preserving independent allocation flexibility.
2Ease of operation
If periodic resources are allocated without coordination parameters, then allocation simplicity is improved, but latency requirement satisfaction deteriorates
Solution Approach 1:
The patent implements feedback by having the mobile termination component determine coordination parameters based on the parent node's resource allocation, and then use these parameters to guide the distributed unit component's resource determination. This feedback mechanism ensures that resource allocations across hops are coordinated to meet latency requirements, while maintaining operational simplicity through automated parameter propagation.
3Manufacturing precision
If dynamic DCI grant is used for each data transmission, then resource allocation precision is improved, but signaling overhead increases
Solution Approach 1:
The patent applies periodic action by establishing periodic resource allocations with predetermined parameters that repeat across multiple transmission occasions. This allows the system to achieve precise resource allocation without requiring dynamic DCI grants for each transmission, thereby reducing signaling overhead while maintaining allocation precision through the periodic resource structure.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless node may receive an indication of a first periodic resource associated with the wireless node, wherein the first periodic resource is associated with one or more parameters for coordinating periodic resources or a priority flag that indicates that the first periodic resource is available to the wireless node irrespective of a resource type associated with the first periodic resource. The wireless node may communicate, with a child node or another wireless node, a message using a modified first periodic resource, wherein the modified first periodic resource includes a modified resource allocation associated with the first periodic resource or a modified resource type associated with first periodic resource. Numerous other aspects are provided.