Method for transmitting satellite synchronization signal on extended pico base station

Abstract

An embodiment of the present invention provides a method for transmitting a satellite synchronization signal on an extended pico base station, including: a baseband unit receives a satellite synchronization signal, combines with service data, and converts it into an optical signal, so that the optical signal is transmitted in an optical fiber The expansion unit receives the optical signal, and converts the optical signal into an electrical signal, so that the electrical signal is transmitted in the twisted pair; the radio frequency remote unit receives the electrical signal, separates and restores the electrical signal from it satellite synchronization signal, and transmit the satellite synchronization signal. The method for transmitting satellite synchronization signals on an extended pico base station provided by the embodiment of the present invention realizes the transmission of satellite synchronization signals through the extended pico base station, makes full use of the transmission link of the extended pico base station, avoids repeated construction, and requires less deployment investment , flexible distribution; and effectively solve the problem of the limitation of the long distance of the satellite synchronization signal.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular to a method for transmitting satellite synchronization signals on an extended pico base station. Background technique [0002] The extended pico base station is an indoor coverage solution actively promoted by mobile operators. According to different standards, it can realize distributed coverage of 2G, 3G, and 4G mobile communication signals. It separates the baseband unit and the remote radio unit, and adds an expansion unit in the middle to realize the flexible distribution and miniaturization of the remote radio unit. [0003] Satellite synchronization, such as GPS (Global Positioning System), Beidou, etc., is widely used in many fields. For application scenarios that require positioning, navigation, timing, and synchronization functions, satellite synchronization is the preferred solution. Satellite synchronization is the preferred solution f...

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Problems solved by technology

Both solutions have obvious limitations: (1) Due to the problem of signal attenuation in the feeder solution, the maximum remote distance does not exceed 100 meters. If the feeder room distribution system is considered for coverage, the actual remote distance will be shorter; (2) The distance of the twisted pair solution has been improved, but limited by power supply and twisted pair transmission distortion factors, it still cannot exceed 300 meters, and the decoded differential signal is transmitted, which can only be connected to one device for use, not Flexible for distributed coverage

Therefore, for many devices and terminals installed in large buildings, shopping malls, and tunnels that require satellite synchronization, it is very difficult to obtain synchronization signals

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