AISG Clock Synchronization via Existing Power Cables
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Solution Overview
Problem
The existing mobile communications systems require separate cables for GPS and RGPS installations, leading to cable waste and complex installations due to the need for broad view positions and multiple connections.
Innovation Solution
A method and system for synchronization using the Antenna Interface Standards Group (AISG) interface to transmit clock information between devices, eliminating the need for additional separate feeders and cables, allowing clock information to be acquired and synchronized without separate cable installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS antenna or RGPS is installed with separate cable connection, then clock synchronization can be achieved, but cable waste and installation complexity increase
Solution Approach 1:
The patent merges the clock signal transmission function into the existing power supply cable that connects the base station to the antenna line device. Instead of using a separate cable for GPS/RGPS clock signals, the invention combines multiple functions (power supply and clock signal transmission) into a single cable connection, thereby reducing cable waste and installation complexity while maintaining reliable clock synchronization.
2Measurement precision
If GPS antenna is installed at position with broad view, then clock recovery accuracy is improved, but installation location constraints increase
Solution Approach 1:
The patent uses the antenna line device as an intermediary to obtain and transmit clock information. Instead of requiring the GPS antenna to be installed at a base station with broad view, the antenna line device (which is already installed at the tower) acquires the clock signal and transmits it through the existing cable connection to the base station, thereby eliminating installation location constraints while maintaining clock recovery accuracy.
3Reliability
If separate cable is used for GPS connection, then clock signal transmission is reliable, but cost and material waste increase
Solution Approach 1:
The patent makes the power supply cable multi-functional by enabling it to carry both power supply and clock signal transmission functions. This eliminates the need for a dedicated separate cable for GPS clock signals, reducing cable material waste and installation costs while maintaining reliable signal transmission through the existing cable infrastructure.
Data Source
AI summary
Embodiments of the present invention provide a method, an apparatus, and a system for synchronization. The method includes the following steps executed by a first device: sending clock information acquiring request to a second device through an Antenna Interface Standards Group AISG interface; receiving a clock signal from the second device through the AISG interface; and performing synchronization according to clock information of the clock signal. The first device is a base station and the second device is an antenna line device, or the first device is an antenna line device and the second device is a base station.