Multi-donor IAB Topology Redundancy for Network Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in integrated access and backhaul (IAB) networks, face challenges in efficiently routing traffic and managing quality of service (QoS) across multiple donor nodes, leading to suboptimal performance and potential congestion.
Innovation Solution
The implementation of a method that involves a first IAB-donor-CU receiving requests from a second IAB-donor-CU to route traffic between associated nodes, transmitting QoS information, and requesting routing of secondary traffic between third and fourth nodes, where the content of the secondary traffic is based on the primary traffic, allowing for inter-donor topology redundancy and QoS management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traffic is routed through multiple donor nodes in IAB networks, then network redundancy and reliability are improved, but routing complexity and QoS management difficulty increase
Solution Approach 1:
The patent introduces a hierarchical routing architecture where donor-CUs act as intermediaries between IAB nodes and the core network. The donor-CU receives routing requests from second donor-CU, determines optimal paths through multiple donors, and manages QoS parameters centrally. This intermediary structure enables multi-donor topology redundancy while centralizing the complexity of routing management at the donor-CU level, preventing complexity from propagating to individual IAB nodes.
2Reliability
If QoS information is transmitted across multiple donor nodes, then service quality is improved, but signaling overhead and transmission delay increase
Solution Approach 1:
The patent implements preliminary QoS parameter configuration at the donor-CU level before actual traffic routing. The first donor-CU receives QoS information from the second donor-CU in advance, determines routing paths, and pre-establishes QoS policies. This preliminary action allows QoS parameters to be configured and validated before traffic flows through multiple donors, reducing real-time transmission delays while maintaining service quality requirements.
3Productivity
If multi-donor BAP routing is implemented, then traffic routing efficiency is improved, but protocol complexity and implementation difficulty increase
Solution Approach 1:
The patent segments the BAP routing functionality into distinct layers: the donor-CU handles complex multi-donor routing decisions and QoS management, while IAB nodes execute simplified forwarding based on donor-CU instructions. This segmentation separates protocol complexity from routing efficiency - the donor-CU implements the complex multi-donor BAP routing logic, while IAB nodes benefit from simplified implementation, overall improving traffic routing efficiency without requiring full protocol complexity at every node.
Data Source
AI summary
A method, a computer-readable medium, and an apparatus are provided. The apparatus may include a first IAB-donor-CU. The apparatus may receive a first request from a second IAB-donor-CU to route a first traffic between a first IAB node associated with the second IAB-donor-CU and a second IAB node associated with the first IAB-donor-CU. The apparatus may receive from the second IAB-donor-CU first QoS information for the first traffic. The apparatus may transmit a request to a third IAB-donor-CU to route a second traffic between a third IAB node associated with the first IAB-donor-CU and a fourth IAB node associated with the third IAB-donor-CU, where at least a part of content of the second traffic is based on the first traffic.