LoRa Base Station Time Synchronization via Server Intermediary

The patent introduces a server as an intermediary that centralizes the time synchronization function. Instead of each base station having its own GPS, the server receives uplink data timing information from multiple base stations and calculates system time differences, then provides correction information to synchronize all base stations. This mediator approach eliminates the need for expensive GPS hardware at each base station while maintaining synchronization reliability.

The patent replaces the GPS-based mechanical/time synchronization system with an electronic/software-based solution. The server uses digital signal processing to analyze uplink data timing information from base stations and calculate time differences electronically. This substitution eliminates dependence on GPS signals that are vulnerable to environmental factors like building blockage and weather, achieving synchronization through purely electronic means that are immune to such interference.

The server acts as a central intermediary that collects timing information from all base stations and performs centralized time difference calculation. This approach eliminates the need for each base station to independently receive GPS signals, which are prone to blockage. The server processes timing data electronically without requiring line-of-sight signal paths, making the synchronization system reliable even in urban environments with building blockage.

The patent implements a feedback mechanism where the server calculates system time differences based on uplink data timing information from base stations, then provides correction information back to the base stations. This closed-loop feedback ensures that even with centralized processing, the timing precision is maintained through continuous measurement and correction. The server can achieve microsecond-level timing precision by analyzing the timing of uplink data packets and adjusting base station transmission times accordingly.