IAB Resource Coordination for Multi-Donor Duplex Constraints
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Solution Overview
Problem
Integrated access and backhaul (IAB) nodes face duplex constraint issues when connected to multiple donor nodes or managed by different donor nodes, leading to insufficient time domain resources and impaired communication efficiency.
Innovation Solution
A communication method involving resource configuration information exchange and adjustment between donor nodes to optimize resource allocation and avoid conflicts, ensuring normal communication by determining and sending third or sixth resource configuration information to resolve duplex constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the wireless access link and the wireless backhaul link use an intra-band working mode, then the IAB node can operate in a simplified frequency configuration, but the IAB-DU and IAB-MT have a duplex constraint problem causing insufficient time domain resources
Solution Approach 1:
The patent implements dynamic resource configuration where the source donor node adjusts the resource configuration of the target cell based on the IAB node's current resource allocation. This dynamic adjustment allows the system to adapt the time domain resources in real-time, resolving the duplex constraint problem while maintaining intra-band operation. The resource configuration information is exchanged and modified to ensure sufficient time resources for both access and backhaul links.
2Reliability
If the IAB node is connected to multiple donor nodes or managed by different donor nodes, then the network coverage and reliability are improved, but the duplex constraint problem becomes more complex and cannot be resolved by conventional single-donor solutions
Solution Approach 1:
The patent introduces the source donor node as an intermediary that coordinates resource configuration between multiple donor nodes. The source donor node receives resource configuration information from the target donor node, performs comprehensive coordination considering multiple donor relationships, and sends adjusted configuration to the IAB node. This intermediary approach resolves the complex duplex constraints in multi-donor scenarios.
Solution Approach 2:
The resource configuration coordination mechanism designed in the patent is universally applicable to both single-donor and multi-donor scenarios. The same coordination process and message exchange protocol work regardless of the number of donor nodes involved, making the solution scalable and versatile for different network architectures.
3Ease of manufacture
If resource configuration of the target cell conflicts with resource configuration of the first cell, then the configuration process is simplified, but the link between the first node and the target parent node does not have sufficient available time domain resources
Solution Approach 1:
The patent implements preliminary resource configuration adjustment where the source donor node proactively modifies the target cell's resource configuration before actual communication occurs. By receiving the target cell's resource configuration information in advance and performing coordination, the system prevents resource conflicts and ensures sufficient time domain resources are allocated before the IAB node accesses the target parent node.
Data Source
AI summary
The technology of this application relates to a communication method and apparatus. The method includes receiving first resource configuration information from a target donor node, determining third resource configuration information based on the first resource configuration information, and sending the third resource configuration information to a first node. The first resource configuration information includes current resource configuration information of a target cell, the target cell is a cell served by a target parent node, and the target parent node is used by the first node to connect to the target donor node. The third resource configuration information is used for resource configuration of a first cell, and the first cell is a cell served by the first node.