All-optical network system and time synchronization method

Abstract

A fully optical network system and time synchronization method are provided. The fully optical network system includes a data center, an optical switching box, a first multiplexing element, and a base station. The data center includes a first fully optical device. The optical switching box includes a second fully optical device. The first fully optical device receives data signals and synchronization signals. The first fully optical device generates a fronthaul signal based on the data signal and synchronization signal, and transmits the fronthaul signal to the second fully optical device. The second fully optical device obtains the data signal and synchronization signal based on the fronthaul signal. The second fully optical device transmits the data signal and synchronization signal to the first multiplexing element and the base station, respectively. The first multiplexing element obtains first traffic data and second traffic data based on the data signal, and transmits the first traffic data and second traffic data to the base station.

Claims

1. An all-optical network system, comprising: The equipment room includes a first all-optical device for receiving data signals and synchronization signals; an optical distribution box including a second all-optical device connected to the first all-optical device via optical fiber and optical cable; a first multiplexing element connected to the second all-optical device; and a base station end connected to the second all-optical device and the first multiplexing element. The first all-optical device generates a fronthaul signal based on the data signal and the synchronization signal, and transmits the fronthaul signal to the second all-optical device. The second all-optical device obtains the data signal and the synchronization signal based on the fronthaul signal, transmits the data signal to the first multiplexing element, and directly transmits the synchronization signal to the base station end. The first multiplexing element obtains first and second traffic data based on the data signal and transmits the first and second traffic data to the base station end. The wavelength of the data signal does not overlap with the wavelength of the synchronization signal. The first all-optical device includes a first optical bandpass filter element, which has a first aperture and a second aperture. The first aperture is used to receive the data signal, and the second aperture is used to receive the synchronization signal. The second all-optical device includes a second optical bandpass filter element, which has a third aperture and a fourth aperture. The third aperture is used to transmit the data signal, and the fourth aperture is used to transmit the synchronization signal.

2. The all-optical network system as described in claim 1, wherein the equipment room further includes: Distributed unit, used to provide the first service information; The baseband processing unit is used to provide the second traffic data; The second multiplexing element connects the distributed unit and the baseband processing unit to couple the first service data and the second service data to generate the data signal; and the first dedicated synchronization element provides the synchronization signal.

3. The all-optical network system as described in claim 1, wherein the base station includes: An active antenna element is used to receive the first traffic data; Radio frequency processing unit, used to receive the second traffic data; And a second dedicated synchronization element for receiving the synchronization signal.

4. The all-optical network system as claimed in claim 1, wherein the first optical bandpass filter element combines the data signal and the synchronization signal to generate the forward transmission signal.

5. The all-optical network system as claimed in claim 4, wherein the passband of the first optical bandpass filter element is set based on the data signal and the synchronization signal.

6. The all-optical network system as claimed in claim 1, wherein the second optical bandpass filter element separates the synchronization signal and the data signal according to the fronthaul signal, transmits the data signal to the first multiplexing element, and transmits the synchronization signal to the base station.

7. The all-optical network system as claimed in claim 6, wherein the passband of the second optical bandpass filter element is set based on the data signal and the synchronization signal.

8. A time synchronization method applicable to all-optical network systems, comprising: The first all-optical device at the equipment room receives data signals and synchronization signals through a first aperture and a second aperture, respectively; the first all-optical device generates a fronthaul signal based on the data signal and the synchronization signal, and transmits the fronthaul signal to the second all-optical device in the optical junction box; the second all-optical device obtains the data signal and the synchronization signal based on the fronthaul signal; the second all-optical device transmits the data signal to a first multiplexing element through a third aperture, and directly transmits the synchronization signal to the base station through a fourth aperture; and the first multiplexing element obtains first and second traffic data based on the data signal, and transmits the first and second traffic data to the base station, wherein the wavelength of the data signal does not overlap with the wavelength of the synchronization signal.

9. The time synchronization method as described in claim 8, wherein the passband region of the first optical bandpass filter element and the passband region of the second optical bandpass filter element are set based on the data signal and the synchronization signal.

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