CN201700011U - A mobile communication network system - Google Patents

Abstract

The utility model provides a mobile telecommunication network system which comprises an antenna and a base station and further comprises an electro-optical converter and a photo-electric converter, wherein the electro-optical converter is connected with the antenna to convert RF electrical signals of the antenna into optical signals and to transmit the optical signals to the base station through a cable; and the photo-electric converter is used to convert optical signals from the electro-optical converter into RF signals and transmit the RF signals to the base station. The antenna adopts a GPS antenna or a beidou antenna. In the mobile telecommunication network system, the analog RF signals of the GPS or beidou receive electro-optical conversion and photo-electric conversion to enable the long distance transmission of the signals of the GPS or beidou through optical fiber, thereby meeting the requirements of long distance transmission of the signals of the GPS or beidou. Besides, the base station can be compatible with the conventional system without changing any software and hardware inside.

Description

A mobile communication network system

technical field

The utility model relates to the field of mobile communication, in particular to a mobile communication network system.

Background technique

Some mobile communication networks such as CDMA networks and TD-SCDMA networks require network synchronization. At present, a major solution is to install GPS (or Beidou) antennas outdoors, and the RF signals from GPS (or Beidou) are introduced into the base station through RF copper cables. , the base station analyzes the time required by the base station and synchronization information from the GPS (or Beidou) signal for base station synchronization.

In network construction, it is very difficult to install GPS (or Beidou) antennas in some places, especially for some indoor coverage sites, where GPS (or Beidou) antennas cannot be installed outdoors close to the base station, resulting in The installation location is far away from the base station installation location.

Currently, there are two commonly used solutions:

The first is the method of combining an RF cable with an amplifier. This method can increase the distance between the GPS (or Beidou) antenna and the base station to a certain extent, but the increased distance is limited, and some longer-distance application scenarios cannot be satisfied, and the material cost of using a thicker feeder cable increases, and the cable diameter Larger, not easy to bend, increased wiring space requirements, and increased construction difficulty;

The second is to design an electro-optical conversion integrated GPS (or Beidou) antenna. The integrated antenna contains GPS antenna, GPS receiving module, second pulse and serial port signal combining logic, and electro-optical converter. The GPS (or Beidou) receiving module recovers the second synchronization pulse and time information. Through the signal combination logic, the two signals are combined into one according to a certain format, and converted into an optical signal through an electro-optical converter, and transmitted over a long distance through an optical fiber. The BBU side undergoes photoelectric conversion, performs second synchronization and time information analysis, and is used for base station synchronization. Although this method also uses optical fiber for long-distance transmission, it has the following disadvantages:

First of all, compared with the traditional antenna and the base station connected by radio frequency cables, the integrated GPS (or Beidou) antenna adds a GPS receiving module, second pulse and serial port signal combination logic, and an electro-optical converter. In addition to the photoelectric converter, the base station side also adds the second pulse and serial port signal separation logic, which requires hardware and logic changes to the original design.

In addition, there are more and more complex active circuits on the side of the GPS (or Beidou) antenna, which increases the risk of reliability of the synchronization system.

Utility model content

The utility model provides a mobile communication network system, which directly converts the analog radio frequency signal of GPS (or Beidou) into electro-optic and photoelectric conversion, so that the GPS (or Beidou) signal can be transmitted over a long distance through an optical fiber to meet the requirements of GPS (or Beidou) The demand for long-distance signal transmission, and the internal software and hardware of the base station do not require any changes, and are compatible with existing systems.

The technical scheme of the utility model is achieved in that:

A mobile communication network system, including an antenna and a base station,

Further include electro-optical converters and photoelectric converters;

The electro-optical converter is connected to the antenna, and is used to convert the radio frequency electrical signal of the antenna into an optical signal, and transmit it to the base station through an optical cable;

The photoelectric converter is used to convert the optical signal from the electro-optical converter into a radio frequency signal and transmit it to the base station.

Preferably, the antenna is a GPS antenna or a Beidou antenna.

Preferably, the electro-optical converter is adjacent to the antenna, and is connected to the antenna through a first copper jumper;

One end of the optical cable is connected to the output end of the electro-optic converter, and the other end is connected to the input end of the photoelectric converter.

Preferably, the electro-optical converter and the antenna form an integrated antenna;

One end of the optical cable is connected to the output end of the integrated antenna, and the other end is connected to the input end of the photoelectric converter.

Preferably, it further includes a power adapter connected to the electro-optic converter, which provides uninterrupted power for the electro-optic converter and the antenna.

Preferably, it further includes a power adapter connected to the integrated antenna, which provides continuous power for the integrated antenna.

Preferably, the base station includes a baseband processing unit, and the output end of the photoelectric converter is connected to the antenna signal input interface of the baseband processing unit through a second copper jumper.

The photoelectric converter is adjacent to the base station and is disposed outside the base station.

The photoelectric converter is built in the base station.

Preferably, a lightning surge suppression circuit is further included, and the lightning surge suppression circuit is arranged in the power input port of the electro-optical converter, the radio frequency signal input port and the power adapter.

It can be seen that the mobile communication network system of the present utility model performs electro-optic and photoelectric conversion on the analog radio frequency signal of GPS (or Beidou), so that the GPS (or Beidou) signal can be transmitted over a long distance through an optical fiber to meet the requirements of the GPS (or Beidou) signal. The demand for long-distance transmission, and the internal software and hardware of the base station do not need any changes, and are compatible with existing systems.

Description of drawings

Fig. 1 is the structural representation of the first embodiment of the mobile communication network system of the present invention;

Fig. 2 is a structural schematic diagram of the second embodiment of the mobile communication network system of the present invention.

Detailed ways

In order to make the purpose and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a structural diagram of the first embodiment of the mobile communication network system of the present invention. As shown in FIG. 1 , the mobile communication network system of the present invention includes an antenna 101 and a base station 102 , and further includes an electro-optical converter 103 and an opto-electronic converter 104 .

Wherein, the electro-optical converter 103 is connected with the antenna 101 , and is used to convert the radio frequency electrical signal of the antenna 101 into an optical signal, and transmit it to the base station 102 through the optical cable 105 .

The photoelectric converter 104 is disposed adjacent to the base station 102 for converting the optical signal from the electro-optic converter 103 into a radio frequency signal and transmitting it to the base station 102 .

Wherein, the antenna 101 may be a GPS antenna or a Beidou antenna.

In the mobile communication network system of the present invention, the electro-optical converter 103 is arranged on the antenna side, by converting the GPS signal of 1.57542 GHz or the Beidou signal of 2.49175 GHz into an optical signal, so as to carry out long-distance transmission through optical fiber, and then through the photoelectric converter 104 converts the optical signal into a GPS or Beidou radio frequency signal, and transmits it to the base station 102, so that the base station 102 can analyze the time and synchronization information required by the base station from the GPS or Beidou radio frequency signal for base station synchronization.

The electro-optical converter 103 is connected to the antenna 101 through a first copper jumper 106 . One end of the optical cable 105 is connected to the output end of the electro-optical converter 103 , and the other end is connected to the input end of the photoelectric converter 104 .

Fig. 2 is a structural schematic diagram of the second embodiment of the mobile communication network system of the present invention. As shown in Figure 2, the mobile communication network system of the present utility model can also integrate the electro-optic converter and the antenna into an integrated antenna 201, then one end of the optical cable 105 is connected to the output end of the integrated antenna 201, and the other end is connected to the photoelectric converter 104 input connection.

As shown in Figures 1 and 2, the base station 102 includes a baseband processing unit (BBU) 107, and the output end of the photoelectric converter 104 is connected to the GPS (or Beidou) signal input interface of the BBU 107 through a second copper jumper 108.

The photoelectric converter 104 is preferably placed outside the location of the BBU 107 to convert the optical signal from a distant GPS (or Beidou) into an electrical signal, and through the short-distance second copper axis jumper 108 and the BBU 107 GPS (or Beidou) copper shaft input interface connection, through the existing GPS signal input interface of BBU 107, transmit to the GPS (or Beidou) receiving module on the base station, and the receiving module of the base station analyzes the synchronization and time information, then the base station side The software and logic will not be changed in any way. . Depending on the application scenario, you can flexibly choose whether to use traditional feeder cables or fiber optics. In addition, the photoelectric converter 104 can also be installed on the internal board of the BBU 107, and the optical interface for GPS (or Beidou) input is left on the front panel of the board, so that the existing board needs to be modified, but the software and logic do not need to be changed .

Preferably, the mobile communication network system of the present invention further includes a power adapter 109 connected to the electro-optic converter 103 or the electro-optic integrated antenna, which is used to provide 24-hour uninterrupted power for the antenna 102 and the electro-optic converter 103, or Directly supply continuous power to the electro-optical integrated antenna 201 .

Preferably, the mobile communication network system of the present invention further includes a lightning surge suppression circuit, which is set at the radio frequency signal input end of the electro-optic converter 103 , the power input end, or the power input end of the electro-optical conversion integrated antenna 201 . In addition, the power input port and the output port of the power adapter 109 also have lightning or surge suppression circuits to avoid damage to the power adapter 109 caused by induced lightning or other surge voltages and currents.

The output of the power adapter 109 has an uninterrupted function to ensure that the GPS (or Beidou) synchronization does not stop working due to power failure of the external power supply, thereby affecting the synchronization of the base station. According to different application situations, its uninterrupted function can be realized by the built-in battery of the power adapter, and the power adapter 109 can also be powered by an external AC or DC power supply with backup function, so that the output of the power adapter 109 has uninterrupted function.

The mobile communication network system of the utility model directly performs electro-optical and photoelectric conversion on radio frequency signals by setting electro-optical converters and photoelectric converters, and solves the base station synchronization problem in the scene where the GPS (or Beidou) antenna is installed far away from the base station. This solution is fully compatible with the GPS (or Beidou) signal transmission solution using copper-axis feeder cables, so that the software and hardware of the base station do not need to be changed in any way. In this way, the feeder cable or optical fiber remote can be flexibly selected according to the site conditions of the base station.

In addition, in this solution, the number of active circuits on the antenna side is much less than that of the existing optical fiber remote solution, and the design is simple, which improves the reliability of the solution. And the power adapter has a power backup function, which ensures that the GPS (or Beidou) antenna and electro-optical converter will not be unable to work due to a sudden power failure due to the input of the power adapter, thereby improving the reliability of the synchronization system.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present utility model shall include Within the protection scope of the utility model.

Claims (10)

1. A mobile communication network system, comprising an antenna and a base station, characterized in that, Further include electro-optical converters and photoelectric converters; The electro-optical converter is connected to the antenna, and is used to convert the radio frequency electrical signal of the antenna into an optical signal, and transmit it to the base station through an optical cable; The photoelectric converter is used to convert the optical signal from the electro-optical converter into a radio frequency signal and transmit it to the base station. 2. The mobile communication network system according to claim 1, wherein the antenna is a GPS antenna or a Beidou antenna. 3. The mobile communication network system according to claim 2, wherein the electro-optic converter is adjacent to the antenna, and is connected to the antenna through a first copper-axis jumper; One end of the optical cable is connected to the output end of the electro-optic converter, and the other end is connected to the input end of the photoelectric converter. 4. The mobile communication network system according to claim 2, wherein the electro-optical converter and the antenna form an integrated antenna; One end of the optical cable is connected to the output end of the integrated antenna, and the other end is connected to the input end of the photoelectric converter. 5. The mobile communication network system according to claim 3, further comprising a power adapter connected to the electro-optical converter, which is used to provide uninterruptible power for the electro-optical converter and the antenna. 6. The mobile communication network system according to claim 4, further comprising a power adapter connected to the integrated antenna for providing continuous power to the integrated antenna. 7. The mobile communication network system according to claim 5 or 6, wherein the base station includes a baseband processing unit, and the output end of the photoelectric converter is connected to the baseband processing unit through a second copper axis jumper. Antenna signal input interface connection. 8. The mobile communication network system according to claim 7, wherein the photoelectric converter is adjacent to the base station and is arranged outside the base station. 9. The mobile communication network system according to claim 7, wherein the photoelectric converter is built in the base station. 10. The mobile communication network system according to claim 7, further comprising a lightning surge suppression circuit, the lightning surge suppression circuit being arranged at the power input port, the radio frequency signal input port and the power input port of the electro-optical converter. in the power adapter.

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