IAB Duplexing Pattern Coordination Under Half-Duplex Constraints
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing IAB technologies face challenges in transmission timing and coordination, particularly under half-duplex constraints, which affect inter-node discovery and measurement, especially in mmWave environments where links can be easily blocked.
Innovation Solution
A method for configuring duplexing patterns in IAB nodes through duplexing pattern configuration messages, allowing flexible and dynamic adjustments to minimize interference and ensure effective communication, including selective muting of SSB transmissions and coordinated duplexing patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wireless backhaul link is used to connect access points, then deployment flexibility and ease of installation are improved, but link reliability and data rate stability deteriorate due to shared medium collisions and interference
Solution Approach 1:
The patent combines the wireless backhaul link and wireless access link into a single integrated access backhaul mode, allowing the same radio resources to serve both backhaul communication between access points and access communication between clients and access points, thereby improving deployment flexibility while managing reliability through coordinated resource allocation
Solution Approach 2:
The system dynamically switches between different operational modes (isolated, overlapping, integrated) based on the spatial relationship between access points and the presence of clients, allowing the network to adapt between static and dynamic resource allocation strategies to balance reliability and flexibility
2Adaptability or versatility
If dynamic resource allocation is implemented to handle multiple operators, then network adaptability and resource utilization are improved, but system complexity and configuration overhead increase
Solution Approach 1:
The system automatically detects the operational mode based on the spatial relationship between access points and the presence of clients, eliminating the need for manual configuration of complex resource allocation parameters. The eNodeB autonomously determines whether to use isolated, overlapping, or integrated mode and configures resource allocation accordingly
Solution Approach 2:
The system changes key parameters such as resource block allocation, transmission time interval, and power control settings based on the detected operational mode. By dynamically adjusting these parameters rather than maintaining a fixed complex configuration system, the patent achieves network adaptability without proportionally increasing system complexity
Data Source
Figure 1
Figure 2a
Figure 2b~2c
AI summary
A method of operating an Integrated Access Backhaul, IAB, node in a wireless communication network is provided. The IAB node is arranged to communicate backhaul traffic wirelessly with a parent node and a child node. The method comprises: receiving a duplexing pattern configuration message from the parent node; transmitting a duplexing pattern configuration message to the child node; receiving a duplexing pattern configuration acknowledgment message from the child node; after receiving the duplexing pattern configuration acknowledgment message from the child node, applying a duplexing pattern contained within the duplexing pattern configuration message received from the parent node; and transmitting a duplexing pattern configuration acknowledgement message to the parent node.