IAB Node Beam Availability Signaling for Backhaul Access Interference
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Solution Overview
Problem
In the context of integrated Access and Backhaul (IAB) nodes in wireless communication, significant interference occurs between the Backhaul link and the Access link due to uncoordinated resource multiplexing, which can disrupt communication.
Innovation Solution
A resource indication method and apparatus that receive indication signaling, determining beam availability information on distributed unit (DU) resources to avoid interference between the Backhaul and Access links, ensuring normal communication by configuring available and unavailable beams based on semi-static or dynamic indication signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency division multiplexing and space division multiplexing are used for resource multiplexing between Backhaul link and Access link, then resource utilization is improved, but interference between the two links increases significantly
Solution Approach 1:
The patent implements dynamic beam availability indication where the parent node dynamically indicates which beams are available or unavailable for the child node's DU resources. This dynamic adjustment allows the system to adapt resource allocation in real-time based on current interference conditions, maintaining high resource utilization while preventing interference between Backhaul and Access links.
Solution Approach 2:
The patent establishes a feedback mechanism where the parent node monitors beam availability and sends indication signaling to the child node about which beams should be used or avoided. This feedback loop enables coordinated resource allocation that prevents interference while maximizing the use of available frequency and spatial resources.
2Loss of energy
If semi-static configuration indication signaling is used for beam availability indication, then signaling overhead is reduced, but resource allocation flexibility decreases
Solution Approach 1:
The patent supports both semi-static and dynamic indication modes. The semi-static mode reduces signaling overhead by configuring beam availability patterns that change infrequently, while the dynamic mode allows real-time adjustments when interference conditions change rapidly. The system can select the appropriate mode based on the specific scenario requirements.
3Adaptability or versatility
If dynamic indication signaling is used for beam availability indication, then resource allocation flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent implements dynamic beam availability indication where the parent node sends frequent updates about beam availability to the child node. This dynamic approach provides high resource allocation flexibility to adapt to changing interference conditions, at the cost of increased signaling overhead between parent and child nodes.
4Adaptability or versatility
If IAB node uses both DU function and MT function simultaneously, then network functionality is enhanced, but interference between Backhaul link and Access link occurs
Solution Approach 1:
The patent segments the beam resources into available and unavailable categories based on their suitability for different link types. By indicating which beams are available for DU functions and which are suitable for MT functions, the system allows simultaneous operation of both functions while preventing interference through proper beam selection.
Solution Approach 2:
The patent applies different beam availability characteristics to different spatial directions and frequency resources. By indicating beam-specific availability information, the system allows the IAB node to use different beams for Backhaul and Access links, enabling simultaneous operation of DU and MT functions without mutual interference.
Data Source
AI summary
Provided are a resource indication method and apparatus, a node, and a storage medium. The method includes that: indication signaling is received by an integrated Access and Backhaul (LAB) node, where the indication signaling includes at least one of semi-static configuration indication signaling or dynamic indication signaling; and beam availability information on a distributed unit (DU) resource of the LAB node is determined by the LAB node according to the indication signaling.