IAB Frequency Resource Sets Using a Reference Carrier
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Solution Overview
Problem
In new radio (NR) communication systems, there is a lack of a specific scheme for determining frequency domain resource division for integrated access and backhaul (IAB) nodes, which hinders flexible resource utilization and increases transmission delay.
Innovation Solution
A method and apparatus for determining frequency domain resources by acquiring carrier resource configuration information, identifying a reference carrier, and configuring frequency domain resource sets based on this information, using predefined or configured parameters to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If IAB nodes use non-time division multiplexing for resource transmission, then resource flexibility and transmission efficiency are improved, but the complexity of determining frequency domain resource division increases due to lack of specific schemes for multiple subcarrier spacing-specific carriers
Solution Approach 1:
The patent changes the parameter of reference carrier selection by introducing a new determination method that uses subcarrier spacing as a key parameter. The IAB-MT determines the reference carrier based on matching the subcarrier spacing of the cell with the subcarrier spacing of the reference carrier, which simplifies the resource division process while maintaining flexibility in non-time division multiplexing scenarios
Solution Approach 2:
The patent segments the frequency domain resources by defining specific resource sets (first resource set, second resource set, third resource set) based on different subcarrier spacing configurations. This segmentation allows independent optimization of resource allocation for different carrier types, reducing the overall complexity of resource management
2Loss of time
If IAB-MT and IAB-DU transmit data simultaneously in frequency-division or space-division multiplexing manner, then transmission delay is reduced, but the difficulty of coordinating frequency domain resources across multiple carriers increases
Solution Approach 1:
The patent introduces the concept of a reference carrier as an intermediary for resource coordination. The reference carrier serves as a baseline for determining resource sets on other carriers, enabling systematic coordination of frequency domain resources across multiple carriers while allowing simultaneous transmission through frequency-division or space-division multiplexing
Solution Approach 2:
The patent performs preliminary determination of the reference carrier and its associated resource sets before actual data transmission. This preliminary action establishes a clear framework for frequency domain resource allocation, enabling IAB-MT and IAB-DU to coordinate their transmissions in advance and avoid conflicts during simultaneous operation
Data Source
AI summary
Provided are a frequency domain resource determining method, a node and a storage medium, and the method includes the following: A first node acquires first carrier resource configuration information sent by a control node; the first node determines a first reference carrier of a cell of a distributed unit (DU) of the first node according to the first carrier resource configuration information; and the first node determines at least one frequency domain resource set of the cell of the DU of the first node based on the first reference carrier, where the first reference carrier includes a first starting resource block and N resource blocks starting from the first starting resource block, and N is configured in the first carrier resource configuration information or predefined.