Multi-RAT IAB Backhaul Routing for Load Balancing
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Solution Overview
Problem
Existing Integrated Access and Backhaul (IAB) networks face challenges in supporting multi-Radio Access Technology (multi-RAT) systems, leading to inefficiencies, reduced robustness, and limited adaptability to traffic loads.
Innovation Solution
The implementation of novel methods and apparatus that enable backhaul load balancing across IAB networks by utilizing different Radio Access Technologies (RATs) for increased data transmission efficiency, optimized spectrum usage, and enhanced reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If single-RAT IAB networks are used, then network architecture is simple, but robustness and adaptability to traffic loads are reduced
Solution Approach 1:
The patent implements multi-RAT capability in IAB nodes, allowing each node to operate with multiple Radio Access Technologies (e.g., NR, LTE, Wi-Fi). This enables a single network infrastructure to handle diverse traffic types and load conditions by dynamically selecting appropriate RATs, thereby achieving universal adaptability without requiring separate dedicated networks for different services.
Solution Approach 2:
The patent introduces dynamic RAT selection and switching mechanisms where IAB nodes can change their operational RAT based on real-time traffic conditions, channel availability, and network topology. This dynamic adaptation allows the network to respond flexibly to varying traffic loads and maintain optimal performance while managing complexity through automated decision-making.
2Productivity
If single-RAT IAB networks are used, then routing is straightforward, but data transmission efficiency and spectrum usage are reduced
Solution Approach 1:
The patent segments the backhaul traffic into different RAT-specific channels and routing paths. By dividing the data transmission function across multiple RATs (e.g., using NR for high-speed data and Wi-Fi for local access), the system can optimize each segment for its specific characteristics, improving overall transmission efficiency while managing routing complexity through structured separation of functions.
Solution Approach 2:
The patent employs parameter-based routing decisions where the network monitors metrics such as spectral efficiency, signal strength, and traffic characteristics to dynamically adjust routing parameters. By changing routing parameters based on real-time conditions rather than following fixed paths, the system achieves optimized data transmission efficiency while keeping routing logic manageable through parameter-driven automation.
3Reliability
If multi-RAT capability is added to IAB nodes, then robustness and adaptability improve, but node complexity increases
Solution Approach 1:
The patent merges multiple RAT functionalities into a unified IAB node architecture, where NR, LTE, and Wi-Fi capabilities are integrated at the protocol stack level. By combining these functions in a coordinated manner with shared resources and unified control, the system achieves enhanced robustness and adaptability while minimizing the increase in node complexity through functional integration rather than separate independent modules.
Solution Approach 2:
The patent introduces a centralized controller or mediator that manages the complexity of multi-RAT operations by coordinating between different RATs. This intermediary layer handles the decision-making and synchronization tasks, allowing individual IAB nodes to maintain simpler local implementations while still benefiting from the robustness of coordinated multi-RAT operation through centralized management.
Data Source
AI summary
The present invention relates to methods and apparatus for providing backhaul wireless services using a plurality of different Radio Access Technologies. An exemplary method embodiment includes the steps of: determining a set of routes for the communication of data from a first wireless base station to a destination wireless base station over wireless backhaul communications links, the first wireless base station being an Integrated Access and Backhaul donor, receiving data of a first flow at the first wireless base station for communication to a first wireless user equipment device attached to the destination wireless base station; and selecting, at the first wireless base station, one or more of the routes of the set of routes from the first wireless base station to the destination wireless base station, the selection being based on multi-Radio Access Technology (multi-RAT) capability of wireless base stations of which a route is comprised.