Path Selection for Integrated Access and Backhaul Networks
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Solution Overview
Problem
The deployment of 5G wireless networks requires a dense number of wireless stations, leading to high costs for wired backhaul data transport, prompting the use of wireless backhaul links to reduce expenses, but this setup faces challenges in selecting optimal paths with adequate channel quality and throughput, especially in scenarios with poor signal quality and congestion.
Innovation Solution
Implement a path selection process in user equipment devices that identifies possible paths to an Integrated Access and Backhaul (IAB) anchor station, considering direct links, channel quality, and throughput, and selects the most suitable path based on application type, signal-to-noise ratio, and congestion levels, allowing for routing around network issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired backhaul is used to transport data from wireless stations, then data transport reliability is improved, but deployment cost increases
Solution Approach 1:
The patent introduces wireless backhaul links as intermediary components between wireless stations and the core network, allowing data transport without wired connections. This mediator approach enables cost reduction by replacing expensive wired infrastructure with wireless alternatives while maintaining data transport functionality.
Solution Approach 2:
The patent creates virtual wired backhaul connections through wireless links, copying the functionality of physical wired backhaul over the air interface. This allows the system to replicate reliable data transport characteristics of wired connections using wireless technology, reducing deployment costs while maintaining performance.
2Ease of manufacture
If wireless backhaul links are used to transport data, then deployment cost is reduced, but path selection complexity increases
Solution Approach 1:
The patent performs preliminary path evaluation by assessing channel quality and throughput metrics before selecting backhaul paths. By pre-evaluating multiple possible paths and their characteristics, the system simplifies real-time path selection decisions while maintaining optimal performance in wireless backhaul networks.
Solution Approach 2:
The patent implements feedback mechanisms that monitor channel quality and throughput of wireless backhaul links, using this information to dynamically adjust path selection. This feedback loop enables the system to adapt to changing network conditions automatically, reducing the complexity of manual path management while maintaining cost efficiency.
3Area of stationary object
If multiple wireless hops are used to reach IAB anchor, then coverage area is extended, but signal quality deteriorates
Solution Approach 1:
The patent implements dynamic path selection that adapts to changing signal conditions in multi-hop wireless backhaul networks. By continuously monitoring channel quality across different hops and dynamically adjusting the selected path, the system maintains signal quality while extending coverage area through multiple wireless relays.
Solution Approach 2:
The patent changes operational parameters such as selecting different frequency resources or modulation schemes based on the number of wireless hops and signal quality conditions. By adjusting these parameters dynamically, the system compensates for signal deterioration in multi-hop scenarios while maintaining extended coverage capability.
Data Source
AI summary
A method may include identifying paths from a user equipment (UE) device to an anchor station, determining that a first path corresponds to a direct wireless link to the anchor station and determining, in response to determining that the first path corresponds to a direct wireless link, a signal quality and a congestion associated with the direct wireless link. The method may also include selecting, in response to determining that the signal quality satisfies a signal quality threshold and the congestion satisfies a congestion threshold, the first path for the UE device to use when communicating with the anchor station. The method may further include identifying, in response to determining that the signal quality does not satisfy the signal quality threshold or the congestion does not satisfy the throughput threshold, another path for the UE device to use when communicating with the anchor station.