Wireless Relay Backhaul Path Switching for Link Recovery
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Solution Overview
Problem
In 5G mobile communications, the instability of wireless link signals at high frequency bands leads to frequent interruptions in backhaul paths, necessitating a method to promptly recover data transmission.
Innovation Solution
A backhaul path switching method is implemented, where pre-established alternative paths are used to quickly switch the data transmission when an interruption occurs, utilizing a network-side node, wireless relay, and terminal to determine and switch between different backhaul paths based on signal quality and link failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless backhaul link uses high frequency band (>6 GHz), then link capacity and coverage are improved, but signal stability deteriorates and link interruptions increase
Solution Approach 1:
The patent pre-establishes multiple alternative backhaul paths (at least a first and second backhaul path) before link failures occur. When the current backhaul path experiences interruptions due to high frequency band instability, the wireless relay can promptly switch to a pre-established alternative path, avoiding service interruptions and maintaining reliable connectivity.
Solution Approach 2:
The patent changes the backhaul path parameter dynamically by switching between different pre-established paths (first backhaul path, second backhaul path, etc.). This allows the system to adapt to varying signal conditions by selecting paths with better signal quality, thereby maintaining reliability while using high frequency bands for high capacity.
2Reliability
If backhaul path switching is implemented when link failure occurs, then data transmission recovery is achieved, but switching time delay increases
Solution Approach 1:
The patent pre-establishes multiple backhaul paths before link failures occur. The alternative paths are prepared in advance with their signal qualities evaluated, so when a failure occurs, the wireless relay can immediately switch to a pre-vetted alternative path without time-consuming path discovery and establishment procedures.
Solution Approach 2:
The wireless relay autonomously determines when switching is needed by monitoring its own backhaul link quality and automatically switches to alternative paths without requiring complex external coordination. This self-service mechanism reduces switching delay by eliminating unnecessary signaling and decision-making delays.
3Adaptability or versatility
If multiple pre-established backhaul paths are maintained, then path switching capability is improved, but network complexity increases
Solution Approach 1:
The patent segments the backhaul network into multiple independent paths from the network-side node to the terminal through different wireless relays. Each path can be independently monitored and switched, allowing the system to maintain adaptability while managing complexity through modular path management rather than a monolithic network structure.
Data Source
AI summary
Embodiments of the present disclosure provide a backhaul path switching method, a wireless relay, a network-side node and a terminal. In the embodiments of the present disclosure, a second backhaul path is pre-established, a backhaul path is switched in the case that a radio link fails or signal quality of a related wireless relay does not meet requirements.