Automatic Synchronization Source Selection in Radio Network Nodes
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Solution Overview
Problem
Current synchronization methods for radio network nodes, such as RIBS, lack mechanisms for automatic establishment of hierarchical best-clock relationships and integration with other synchronization protocols, making manual provisioning impractical as the number of nodes increases.
Innovation Solution
Implementing automatic synchronization source selection using Radio-interface Based Synchronization (RIBS) with the exchange of clock-attribute information between nodes, enabling Best Master Clock Selection (BMCS) algorithms to automatically choose the best synchronization source based on OTA signal quality and clock attributes, reducing the need for manual setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual provisioning is used for synchronization source selection, then configuration accuracy can be ensured, but the complexity of operation increases significantly as the number of nodes increases
Solution Approach 1:
The system enables radio network nodes to automatically select their own synchronization sources by evaluating reception quality metrics and clock attributes of neighboring nodes. Each node independently performs the selection process without requiring manual configuration, thereby reducing operational complexity while maintaining synchronization accuracy through algorithmic evaluation of multiple parameters.
2Quantity of substance
If the number of radio network nodes increases, then network coverage and capacity improve, but the difficulty of detecting and measuring synchronization quality increases
Solution Approach 1:
The system implements a feedback mechanism where nodes continuously monitor and evaluate the reception quality of synchronization signals from neighboring nodes. By measuring parameters such as signal strength, timing accuracy, and clock attributes, the system automatically adjusts synchronization source selection based on real-time conditions, making the detection and measurement process scalable to large numbers of nodes.
3Ease of operation
If automatic synchronization source selection is implemented, then ease of operation improves, but reliability may be compromised without proper evaluation mechanisms
Solution Approach 1:
The system ensures reliable automatic selection by evaluating multiple parameters including reception quality metrics (signal strength, timing accuracy) and clock attributes (stability, accuracy class) of candidate synchronization sources. By changing and comparing these parameters across multiple nodes, the system reliably identifies the optimal synchronization source while maintaining operational simplicity.
Data Source
AI summary
A group of radio network nodes (14) performs automatic synchronization source selection using Radio-interface Based Synchronization, based on the exchange of clock-attribute information between respective nodes (14) via inter-node connections. Access to the clock-attribute information for other nodes (14) in the same domain or subdomain allows a given node (14) to select the best or most preferred synchronization source for use in synchronizing its own clock (44), based on a combined or joint evaluation of parameters or metrics that include the reception quality of OTA signals from respective ones of the candidate nodes (14) and the corresponding clock-attribute information. Further parameters or metrics may be evaluated in the selection, such as neighbor-relation considerations. The combined use of OTA synchronization signaling and clock-attribute information exchanges, e.g., according to IEEE 1588 PTP, enables the group of nodes (14) to carry out Best Master Clock Selection (BMCS) or Alternate BMCS algorithms on an automatic basis.