Access Network Node Link Switching for Reliability and Efficiency
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Solution Overview
Problem
Access networks face challenges in maintaining high reliability and channel efficiency, especially in C-RAN configurations where varying data types require different priority levels, and existing solutions do not adequately address channel failure and quality degradation.
Innovation Solution
An access network node with a link switching mechanism that identifies data types and selectively uses either active or standby links based on data type, incorporating a data identification part and a controller to manage link usage between adjacent nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standby link is laid between RRU and BBU to improve reliability, then reliability is improved, but channel efficiency deteriorates due to reduced usage efficiency
Solution Approach 1:
The patent implements dynamic link selection where the standby link transitions from a dormant state to an active transmission state based on real-time data type identification. The system dynamically switches between using active and standby links depending on whether the data is time-sensitive or delay-tolerant, making the network topology adaptive rather than static.
Solution Approach 2:
The system changes the operational parameter of the standby link from 'standby' to 'active' based on data type parameters. By identifying data characteristics (time-sensitive vs. delay-tolerant), the system modifies the link state parameter, allowing the same physical infrastructure to serve different functional purposes under different conditions.
2Reliability
If all data is transmitted through the active link to ensure quality, then QoS is maintained, but reliability deteriorates due to lack of redundancy utilization
Solution Approach 1:
The patent applies different transmission qualities to different data types locally. Time-sensitive data receives high-priority treatment through the active link with QoS guarantees, while delay-tolerant data is routed through the standby link. This local differentiation allows each data stream to receive appropriate quality treatment based on its specific requirements.
Solution Approach 2:
The system segments data traffic into two categories: time-sensitive data and delay-tolerant data. This segmentation allows independent routing decisions for each category, with time-sensitive data using the active link and delay-tolerant data using the standby link, thereby optimizing both QoS and redundancy utilization.
3Productivity
If standby link is used for non-critical data to improve channel efficiency, then channel efficiency is improved, but reliability deteriorates if active link fails
Solution Approach 1:
The system performs preliminary identification of data type characteristics before transmission routing decisions are made. By identifying whether data is time-sensitive or delay-tolerant in advance, the system can pre-determine the appropriate link for transmission, ensuring that delay-tolerant data is routed through the standby link while maintaining the capability for rapid failover if the active link fails.
Data Source
AI summary
An access network node is provided with: a link switching part configured to be capable of exchanging data by switching between an active link and a standby link established with an adjacent node; a data identification part configured to identify type of data to be exchanged with an accommodated terminal; and a controller configured to select, from between the active link and the standby link, a link to be used in exchanging data with the accommodated terminal, based on the data type.