Base Station Mode Switching for Wireless Backhaul Capacity
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Solution Overview
Problem
In wireless communication systems, the high density of small cell base stations required for increased capacity leads to complex and costly backhaul line installations, and existing wireless multi-hop communication technologies face challenges in maintaining system capacity when the ratio of relay node base stations is high, resulting in reduced air interface capacity and high throughput requirements.
Innovation Solution
A wireless communication system that adaptively switches the function of core node base stations or relay node base stations based on the quality of wireless backhaul and peripheral links, using a path generator to determine the optimal connection mode between base stations, reducing the need for wired backhaul installations and maintaining system capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a high ratio of relay node base stations is used to reduce wired backhaul installation, then ease of installation is improved, but system capacity of the air interface is reduced
Solution Approach 1:
The patent implements dynamic mode switching for base stations, allowing them to transition between relay mode and access mode based on real-time link quality assessments. This dynamic adaptation enables the system to optimize the ratio of relay nodes versus core nodes, maintaining system capacity while minimizing wired backhaul installation requirements.
Solution Approach 2:
The system continuously monitors link quality metrics and uses this feedback to adjust base station operating modes. When link quality deteriorates below thresholds, base stations switch from relay mode to access mode, preventing capacity degradation while maximizing the use of wireless backhaul when conditions permit.
2Ease of manufacture
If wireless multi-hop communication is used to eliminate wired backhaul, then ease of installation is improved, but device complexity increases
Solution Approach 1:
The patent segments the backhaul network into multiple hierarchical levels with core node base stations providing wired connections and relay node base stations providing wireless connections. This segmentation allows the system to benefit from wireless installation ease while distributing complexity across multiple manageable components rather than requiring every node to handle full multi-hop routing.
Solution Approach 2:
Core node base stations act as intermediaries between the wired backbone network and relay node base stations. This intermediary layer simplifies the overall system architecture by providing a stable wired anchor point, reducing the complexity burden on individual relay nodes while still enabling wireless backhaul deployment.
3Area of stationary object
If relay node base stations are densely deployed to expand coverage, then area coverage is improved, but the required throughput of hop links increases
Solution Approach 1:
The system dynamically changes operational parameters including base station mode (relay vs. access), link quality thresholds, and traffic routing decisions based on real-time conditions. This parameter adaptation allows the system to expand coverage area while adjusting throughput requirements according to actual link capabilities, preventing excessive bandwidth demands on individual hop links.
Data Source
AI summary
A wireless communication system includes a first base station connectable to a backbone network by a wireless backhaul, and a path generator generating a wireless multi-hop path including the first base station and one or more second base stations connected to the first base station by a wireless multi-hop. The first base station reports a measurement result of a line quality of the wireless backhaul and a measurement result of a line quality between the first base station and the second base station disposed around the first base station. The first base station is switched to a first mode connected to the backbone network by the wireless backhaul or to a second mode connected to the second base station by a wireless multi-hop, in response to the path signal.