IAB Resource Availability Signaling for Flexible Slot Allocation
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Solution Overview
Problem
Existing integrated access and backhaul (IAB) network technologies face challenges in flexibly indicating resource availability, which affects communication performance.
Innovation Solution
A communication method and apparatus that allows a first node to determine resource availability based on indication information from a second node, considering frequency domain resource groups, to facilitate communication with a third node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resource availability indication is provided at slot level for all frequency domain resources, then resource allocation flexibility is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent segments frequency domain resources into multiple frequency domain resource groups, where each group can be independently indicated for availability. This allows selective indication of resource availability at different granularities - either at slot level for all groups or at frequency domain resource group level for specific groups, thereby reducing overall indication complexity while maintaining flexibility where needed.
Solution Approach 2:
The patent enables dynamic switching between different indication modes - slot-level indication for all frequency domain resource groups, or frequency domain resource group-level indication for specific groups. This dynamic adaptability allows the system to adjust the indication granularity based on actual resource availability patterns, optimizing the balance between flexibility and complexity.
2Reliability
If resource availability is indicated for every slot and frequency resource, then communication performance is improved, but signaling overhead increases
Solution Approach 1:
The patent divides frequency domain resources into multiple frequency domain resource groups and enables selective indication of availability for each group. This segmentation allows the system to indicate resource availability only where necessary (at frequency domain resource group level for specific groups) rather than uniformly for all resources, reducing signaling overhead while maintaining communication performance in critical areas.
Solution Approach 2:
The patent applies different indication granularities to different frequency domain resource groups based on local requirements. Frequency domain resource groups that require fine-grained control can be indicated at the group level, while others can use coarser slot-level indication, optimizing the balance between performance and overhead for each local region of the frequency spectrum.
Data Source
AI summary
A communication method applied to a first node includes receiving first indication information and second indication information from a second node, wherein the first indication information indicates resource availability of a first slot in a first set, the first set comprises at least one slot, the first slot is a slot in which a first resource is configured, the second indication information indicates resource availability of a first frequency domain resource group. A second resource is determined based on at least one of the first indication information or the second indication information. a third node is communicated with over the first resource, wherein the second node is an upper-level integrated access and backhaul (IAB) node of the first node, the third node is a lower-level IAB node of the first node.