Switching Node Synchronization via Main Control Node
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Solution Overview
Problem
The high deployment cost of GPS apparatuses at each base station for frequency and time synchronization in GSM, UMTS, and LTE systems, and the inefficiency of synchronization time transmission through backhaul paths, result in increased device deployment costs and reduced stability due to the number of intermediate network elements.
Innovation Solution
A synchronization method and system where a switching node acquires synchronization time from a main control node and sends it to connected controlled nodes, eliminating the need for GPS on each node and reducing intermediate network elements by using a direct connection, thereby improving stability and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS apparatuses are installed at each base station for frequency and time synchronization, then synchronization accuracy is improved, but device deployment cost increases
Solution Approach 1:
The patent uses a virtual copy mechanism where the synchronization time from the main control node is transmitted through the backhaul path to controlled nodes. Instead of each node having its own GPS apparatus, the synchronization information is copied and distributed through the network, achieving the same synchronization function with reduced hardware deployment.
Solution Approach 2:
The backhaul path acts as an intermediary to transmit synchronization time from the main control node to controlled nodes. This mediator enables synchronization information transfer without requiring direct GPS connections at each node, reducing device complexity while maintaining synchronization accuracy.
2Device complexity
If synchronization time is transmitted through backhaul path, then device deployment cost is reduced, but synchronization stability deteriorates due to intermediate network elements
Solution Approach 1:
The main control node performs preliminary synchronization with GPS and pre-processes the synchronization time before transmission. By preparing the synchronization information in advance at the main control node and transmitting it through the backhaul path, the system reduces the impact of intermediate network elements on stability.
Solution Approach 2:
The system implements feedback mechanisms where controlled nodes report their synchronization status and timing information is adjusted based on feedback from the network. This feedback loop compensates for potential instabilities introduced by intermediate network elements in the backhaul path.
Data Source
AI summary
Embodiments of the present disclosure provide a synchronization method, device, and system, and relate to the field of communications, so that a device deployment cost may be reduced and the stability of device synchronization may be improved. The method includes: acquiring, by a switching node, synchronization time from a main control node; and sending, by the switching node, the synchronization time to each controlled node that is connected to the switching node, so as to perform time synchronization between each controlled node and the main control node.