WO2017005109A1

WO2017005109A1 - Communication method and device

Info

Publication number: WO2017005109A1
Application number: PCT/CN2016/087313
Authority: WO
Inventors: 王彦辉; 王强; 孙科
Original assignee: 华为技术有限公司
Priority date: 2015-07-07
Filing date: 2016-06-27
Publication date: 2017-01-12
Also published as: CN106341162A

Abstract

Disclosed is a communication method, comprising: a first device, receiving a first high-frequency analog signal transmitted by a base station. The first device converts the first high-frequency analog signal into a first intermediate-frequency analog signal, and transmits the first intermediate-frequency analog signal to a second device via a power line. The technical solution provided in the present invention introduces, using a power line already arranged in a place, an outdoor signal or a signal in a strong signal coverage location into a weak signal coverage location via wire transmission, and then transmits wirelessly, thereby improving an indoor signal coverage in a cellular network conveniently, efficiently and at a low cost. The present invention, as compared with the conventional coaxial transmission, maintains a high signal to noise ratio, and also improves user experience.

Description

Communication method and device

Technical field

Embodiments of the present invention relate to the field of wireless communications, and, more particularly, to a communication method and apparatus.

Background technique

With the gradual popularization of mobile cellular networks, its coverage performance has gradually received attention as an important quality indicator. For example, indoors, there is still a problem that the mobile cellular network signal is weak and the mobile phone cannot communicate normally. The solution to solve this problem in the prior art is mainly to deploy a mobile phone signal booster, but the deployment of this method is difficult, especially for the deployment of the necessary components of the coaxial cable: there is no ready-made coaxial cable in the room. Line channels, therefore, need to use open line deployment, in particular, considering the isolation requirements between the transceiver antennas, outdoor antennas and indoor devices need to maintain a distance of 8-10 meters to avoid crosstalk problems, longer coaxial cable routing The increase is not only the difficulty of deployment, but also reduces the user experience.

Therefore, how to enhance the indoor signal coverage of mobile cellular networks conveniently, efficiently and at low cost is an urgent problem to be solved.

Summary of the invention

In view of this, embodiments of the present invention provide a communication method, device, and system to enhance coverage performance of a mobile cellular network conveniently, efficiently, and at low cost.

In a first aspect, an embodiment of the present invention provides a communication method, where the method includes: a first device receives a first high frequency analog signal sent by a base station; and the first device converts the first high frequency analog signal into a first intermediate frequency analog signal; the first device transmitting the first intermediate frequency analog signal to a second device by a power line; wherein the first high frequency analog The frequency of the signal is higher than the frequency of the first intermediate frequency analog signal.

In a second aspect, an embodiment of the present invention provides a communication method, where the method includes: receiving, by a second device, a first intermediate frequency analog signal sent by a first device by using a power line; and using, by the second device, the first intermediate frequency analog signal Converting to a third high frequency analog signal; the second device transmitting the third high frequency analog signal to a terminal; wherein a frequency of the third high frequency analog signal is higher than a frequency of the first intermediate frequency analog signal .

In an implementation manner of the first aspect of the embodiments of the present invention, the method further includes: receiving, by the first device, a second intermediate frequency analog signal that is sent by the second device by using the power line; Converting the second intermediate frequency analog signal into a second high frequency analog signal; the first device transmitting the second high frequency analog signal to the base station; wherein the frequency of the second high frequency analog signal is higher than The second intermediate frequency analog signal is described.

In an implementation manner of the second aspect of the embodiments of the present invention, the method further includes: the second device receives a fourth high frequency analog signal sent by the terminal; and the second device uses the fourth high frequency Converting the analog signal into a second intermediate frequency analog signal; the second device transmitting the second intermediate frequency analog signal to the first device through the power line; wherein a frequency of the fourth high frequency analog signal is higher than The frequency of the second intermediate frequency analog signal.

In combination with the foregoing implementation manner, in an implementation manner of the first aspect or the second aspect of the embodiment, the signal strength of the base station at the second device is lower than the signal strength of the base station at the first device; The base station is configured to implement communication with the terminal.

In combination with the foregoing implementation manner, in an implementation manner of the first aspect of the embodiment, the first device converts the first high frequency analog signal into a first intermediate frequency analog signal, specifically: the first device The first high frequency analog signal is converted into a down converter The first intermediate frequency analog signal.

With reference to the foregoing implementation manner, in an implementation manner of the first aspect of the embodiment, the first device converts the second intermediate frequency analog signal into a second high frequency analog signal, specifically: the first device The second intermediate frequency analog signal is converted into a second high frequency analog signal by an upconverter.

In combination with the foregoing implementation manner, in an implementation manner of the first aspect of the embodiment, the first device sends the first intermediate frequency analog signal to the second device by using a power line, specifically:

The first device couples the first intermediate frequency analog signal to the power line through a transformer, and then transmits the power to the second device through the power line.

With reference to the foregoing implementation manner, in an implementation manner of the first aspect of the embodiment, the first device, by using the power line, the second intermediate frequency analog signal that is sent by the second device, is specifically: the first device The second intermediate frequency analog signal transmitted by the second device through the power line is coupled to the first device from the power line by the transformer.

In combination with the foregoing implementation manner, in an implementation manner of the second aspect of the embodiment of the present invention, the second device converts the first intermediate frequency analog signal into a third high frequency analog signal, specifically: the second device The first intermediate frequency analog signal is converted into a third high frequency analog signal by an upconverter.

In combination with the foregoing implementation manner, in an implementation manner of the second aspect of the embodiment of the present invention, the second device converts the fourth high frequency analog signal into a second intermediate frequency analog signal, specifically: the second device The fourth high frequency analog signal is converted into a down converter The second intermediate frequency analog signal.

With reference to the foregoing implementation manner, in an implementation manner of the second aspect of the embodiment, the second device receives the first intermediate frequency analog signal sent by the first device by using a power line, where the second device passes the transformer. The first intermediate frequency analog signal transmitted by the first device is coupled to the second device from the power line.

With reference to the foregoing implementation manner, in an implementation manner of the second aspect of the embodiment of the present invention, the sending, by the second device, the second intermediate frequency analog signal to the first device by using the power line is specifically: The second device couples the second intermediate frequency analog signal to the power line through the transformer, and transmits the power to the first device through the power line.

In a third aspect, an embodiment of the present invention provides a first device, including: a receiver, configured to receive a first high frequency analog signal sent by a base station; and a first converter, configured to convert the first high frequency analog signal into a first intermediate frequency analog signal; a transmitter configured to transmit the first intermediate frequency analog signal to the second device by a power line; wherein a frequency of the first high frequency analog signal is higher than the first intermediate frequency analog signal Frequency of.

In a fourth aspect, an embodiment of the present invention provides a second device, including: a transmitter, configured to receive, by using the power line, a first intermediate frequency analog signal sent by the first device; and a third converter, Converting the first intermediate frequency analog signal into a third high frequency analog signal; a transmitter for transmitting the third high frequency analog signal to the terminal; wherein the frequency of the third high frequency analog signal is higher than the first The frequency of an intermediate frequency analog signal.

In an implementation manner of the third aspect of the embodiment, the transmitter is further configured to receive, by the power line, a second intermediate frequency analog signal that is sent by the second device; the first device further includes a second a converter for converting the second intermediate frequency analog signal into a second high frequency analog signal; a transmitter, configured to send the second high frequency analog signal to the base station; wherein a frequency of the second high frequency analog signal is higher than a frequency of the second intermediate frequency analog signal .

In an implementation manner of the fourth aspect of the embodiment of the present invention, the second device further includes: a receiver, configured to receive a fourth high frequency analog signal sent by the terminal; and a fourth converter, configured to Converting the four high frequency analog signals into a second intermediate frequency analog signal; the transmitter is further configured to transmit the second intermediate frequency analog signal to the first device through the power line; wherein the fourth high frequency analog The frequency of the signal is higher than the frequency of the second intermediate frequency analog signal.

In an implementation manner of the third aspect of the embodiments of the present invention, the first converter includes a down converter, specifically configured to convert the first high frequency analog signal into a first An intermediate frequency analog signal.

In an implementation manner of the third aspect of the embodiments of the present invention, the second converter includes an up-converter, specifically configured to convert the second intermediate frequency analog signal into a second through an up-converter. High frequency analog signal.

In an implementation manner of the third aspect of the embodiments of the present invention, the transmitter includes: a transformer, a filter, and a capacitor; and the filter is configured to be first in the first converter. After converting the high frequency analog signal into the first intermediate frequency analog signal, filtering out the noise signal outside the first intermediate frequency analog signal; the transformer is used to pass The first intermediate frequency analog signal after the filter is coupled to the power line, and then sent by the power line to the second device; the capacitor is used when the first intermediate frequency analog signal is used by the power line When transmitting to the second device, the power frequency signal on the power line is isolated, and the first intermediate frequency analog signal is turned on.

In an implementation manner of the foregoing third aspect, the capacitor is further configured to: when the second intermediate frequency analog signal is sent by the power line to the first device, the isolation device The power frequency signal on the power line turns on the second intermediate frequency analog signal. The transformer is further configured to couple the second intermediate frequency analog signal transmitted by the second device through the power line to the first device from the power line; the filter is further configured to filter The noise signal outside the second intermediate frequency analog signal.

In an implementation manner of the fourth aspect of the embodiments of the present invention, the third converter includes an up-converter, specifically configured to convert the first intermediate frequency analog signal into a third through an up-converter High frequency analog signal.

In an implementation manner of the fourth aspect of the embodiments of the present invention, the fourth converter includes a down converter, specifically configured to convert the fourth high frequency analog signal into a first Two intermediate frequency analog signals.

In an implementation manner of the fourth aspect of the embodiments of the present invention, the transmitter includes: a transformer, a filter, and a capacitor; and the capacitor is configured to: when the first intermediate frequency analog signal is used by the When the power line is sent to the second device, the power frequency signal is isolated on the power line, and the first intermediate frequency analog signal is turned on. The transformer, configured to couple the first intermediate frequency analog signal sent by the first device to the second device from the power line; the filter, configured to filter the first intermediate frequency analog Letter Noise signal outside the number.

In an implementation manner of the fourth aspect of the embodiments of the present invention, the filter is further configured to: after the fourth converter converts the fourth high frequency analog signal into the second intermediate frequency analog signal, Filtering a noise signal other than the second intermediate frequency analog signal; the transformer is further configured to couple the second intermediate frequency analog signal passing through the filter to the power line, and then transmit the power through the power line The first device; the capacitor is further configured to isolate a power frequency signal on the power line when the second intermediate frequency analog signal is sent by the power line to the first device, and turn on the power line The second intermediate frequency analog signal.

In a fifth aspect, an embodiment of the present invention provides another communication method, including: a first device receives a first baseband signal sent by a baseband processing unit BBU; and the first device converts the first baseband signal by an upconverter a first intermediate frequency analog signal; the first device transmitting the first intermediate frequency analog signal to the second device by a power line; wherein a frequency of the first baseband signal is lower than a frequency of the first intermediate frequency analog signal frequency.

In a sixth aspect, the embodiment of the present invention provides another communication method, including: receiving, by a second device, a first intermediate frequency analog signal sent by the first device by using a power line; and using, by the second device, the first intermediate frequency analog signal Converting to the first high frequency analog signal by the upconverter; the second device transmitting the first high frequency analog signal to the terminal; wherein the frequency of the first high frequency analog signal is higher than the first intermediate frequency The frequency of the analog signal.

In an implementation manner of the fifth aspect of the embodiments of the present invention, the method further includes: receiving, by the first device, a second intermediate frequency analog signal that is sent by the second device by using the power line; Converting the second intermediate frequency analog signal to a down converter a second baseband signal; the first device transmitting the second baseband signal to the BBU; wherein a frequency of the second baseband signal is lower than a frequency of the second intermediate frequency analog signal.

In an implementation manner of the sixth aspect of the embodiments of the present invention, the method further includes: the second device receives a second high frequency analog signal sent by the terminal; and the second device uses the second device The high frequency analog signal is converted to a second intermediate frequency analog signal by a downconverter; the second device transmits the second intermediate frequency analog signal to the first device through the power line; wherein the second high frequency analog The frequency of the signal is higher than the frequency of the second intermediate frequency analog signal.

In an implementation manner provided by the fifth or sixth aspect of the embodiment, the signal strength of the BBU at the first device is higher than the signal strength of the BBU at the second device. The BBU is configured to implement communication with the terminal.

With reference to the foregoing implementation manner, in an implementation manner of the fifth aspect of the embodiments of the present disclosure, the first device sends the first intermediate frequency analog signal to the second device by using a power line, specifically: the first The device couples the first intermediate frequency analog signal to the power line through a transformer and transmits the power to the second device through the power line.

With reference to the foregoing implementation manner, in an implementation manner provided by the fifth aspect of the embodiment of the present invention, the receiving, by the first device, the second intermediate frequency analog signal sent by the second device by using the power line is: A device couples a second intermediate frequency analog signal transmitted by the second device from the power line to the first device through the transformer.

In conjunction with the foregoing implementation manner, in an implementation manner provided by the sixth aspect of the embodiments of the present disclosure, the second device receives the first intermediate frequency mode sent by the first device by using a power line. The pseudo signal is specifically: the second device receives, by the transformer, the first intermediate frequency analog signal sent by the first device from the power line to be coupled to the second device.

With reference to the foregoing implementation manner, in an implementation manner of the sixth aspect of the embodiments of the present disclosure, the sending, by the second device, the second intermediate frequency analog signal to the first device by using the power line is specifically: A second device couples the second intermediate frequency analog signal to the power line through the transformer, and transmits the power to the first device through the power line.

In a seventh aspect, the embodiment of the present invention provides another first device, including: a receiver, configured to receive a first baseband signal sent by a baseband processing unit BBU; and an upconverter, configured to convert the first baseband signal a first intermediate frequency analog signal; a transmitter configured to transmit the first intermediate frequency analog signal to the second device by a power line; wherein a frequency of the first baseband signal is lower than a frequency of the first intermediate frequency analog signal frequency.

In an eighth aspect, an embodiment of the present invention provides another second device, including: a transmitter, configured to receive, by using a power line, a first intermediate frequency analog signal sent by the first device; and an up-converter, configured to: An intermediate frequency analog signal is converted into a first high frequency analog signal; a transmitter is configured to send the first high frequency analog signal to a terminal; wherein a frequency of the first high frequency analog signal is higher than the first intermediate frequency The frequency of the analog signal.

In an implementation manner of the seventh aspect of the embodiments of the present invention, the transmitter is further configured to receive, by the power line, a second intermediate frequency analog signal that is sent by the second device, where the first device further includes: a down converter for converting the second intermediate frequency analog signal into a second baseband signal; a transmitter for transmitting the second baseband signal to the BBU; wherein the second baseband signal has a low frequency The second intermediate frequency analog signal frequency.

In an implementation manner of the eighth aspect of the present invention, the second device further includes: a receiver, configured to receive a second high frequency analog signal sent by the terminal; and a down converter, where Converting the two high frequency analog signals into a second intermediate frequency analog signal; the transmitter is further configured to transmit the second intermediate frequency analog signal to the first device through the power line; wherein the second high frequency analog The frequency of the signal is higher than the frequency of the second intermediate frequency analog signal.

In conjunction with the foregoing implementation manner, in an implementation manner provided by the seventh or eighth aspect of the embodiment, the signal strength of the BBU at the first device is higher than the signal strength of the second device. The BBU is configured to implement communication with the terminal.

In an implementation manner of the seventh aspect of the embodiments of the present invention, the transmitter includes: a transformer, a filter, and a capacitor; and the filter is configured to be used by the upconverter After converting the first baseband signal into the first intermediate frequency analog signal, filtering out the noise signal outside the first intermediate frequency analog signal; the transformer, configured to couple the first intermediate frequency analog signal after the filter to And the power line is sent to the second device through the power line; the capacitor is configured to be isolated on the power line when the first intermediate frequency analog signal is sent by the power line to the second device The power frequency signal turns on the first intermediate frequency analog signal.

In an implementation manner of the seventh aspect of the embodiments of the present invention, the capacitor is further configured to: when the second intermediate frequency analog signal is sent by the power line to the first device, is isolated. The power frequency signal on the power line turns on the second intermediate frequency analog signal. The transformer is further configured to send the second device from the power line And transmitting a second intermediate frequency analog signal to the first device; the filter is further configured to filter out a noise signal outside the second intermediate frequency analog signal.

In an implementation manner of the eighth aspect of the embodiments of the present invention, the transmitter includes: a transformer, a filter, and a capacitor; and the capacitor is used by the first intermediate frequency analog signal by the When the power line is sent to the second device, the power frequency signal is isolated on the power line, and the power frequency signal is isolated on the power line to turn on the first intermediate frequency analog signal. The transformer, configured to receive, from the power line, the first intermediate frequency analog signal sent by the first device into the second device; the filter, configured to filter the first intermediate frequency A noise signal outside the analog signal.

In an implementation manner of the eighth aspect of the embodiments of the present invention, the filter is further configured to convert the second high frequency analog signal into a second intermediate frequency analog in the down converter After the signal, filtering out the noise signal outside the second intermediate frequency analog signal; the transformer is further configured to couple the second intermediate frequency analog signal passing through the filter to the power line, and then send the power line through the power line To the first device; the capacitor is further configured to isolate a power frequency signal on the power line and turn on a power line when the second intermediate frequency analog signal is sent by the power line to the first device The second intermediate frequency analog signal.

In a ninth aspect, the embodiment of the present invention further provides a computer program, which can be used to cause a computer to perform the methods provided by the first aspect and the second aspect and the implementation manners thereof.

In a tenth aspect, the embodiment of the present invention further provides a system, where the system includes the first device provided by the third aspect and various implementation manners thereof, and the second device provided by the fourth aspect and various implementation manners thereof; or the system Including the seventh aspect and its various implementations The first device and the second device provided by the eighth aspect and various implementations thereof.

The technical solution provided by the embodiment of the invention improves the indoor signal coverage of the mobile cellular network by using the power line already deployed in the site and the improvement of the internal structure of the first device and the second device, so that the indoor signal coverage of the mobile cellular network can be enhanced conveniently, efficiently, and at low cost. Since the signal transmission attenuation of the power line indoors is significantly lower than the signal transmission attenuation of the power line outdoors, the signal-to-noise ratio of the signal displayed in the simulation experiment after passing through the power line can meet the signal quality requirements of the communication, and at the same time, with the prior art Compared with the coaxial cable used in the mobile phone signal booster, it is not exposed to the user's visibility, thus maintaining a high signal to noise ratio and increasing the user experience.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic structural diagram of a first device and a second device according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of another first device 300 and another second device 400 according to an embodiment of the present disclosure;

Figure 3 (a) is a graph showing the approximate attenuation characteristics of power line transmission as a function of frequency;

Figure 3 (b) is a diagram showing the approximate noise characteristics of the indoor power line transmission and the outdoor power line transmission as a function of frequency;

FIG. 4 is a flowchart of a communication method according to an embodiment of the present invention;

FIG. 5 is a flowchart of another communication method according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

The technical solution of the present invention can be applied to various communication systems, for example, global system of mobile communication (GSM), code division multiple access (CDMA), wideband code division multiple access ( WCDMA (wideband code division multiple access wireless), general packet radio service (GPRS), long term evolution (LTE), and the like.

Of course, the invention is not limited to the cases listed above.

In addition, the base station mentioned in the embodiment of the present invention, for example, in the LTE system, the base station may be an eNodeB, or may be a home eNodeB (HeNB, home eNodeB), an AP, or the like. In a UMTS system, the base station may include a Node B and a Radio Network Controller (RNC). In the GSM system, the base station may include a base station controller (BSC), a base transceiver station (BTS), and the like. The terminal may also be referred to as a user equipment, a mobile station, a subscriber unit, a station, or the like. The user equipment may specifically be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld, a laptop computer, a cordless telephone. (cordless phone), wireless local loop (WLL) station, etc.

The beneficial effects of the technical solutions provided by the embodiments of the present invention may be embodied by the communication between the first device and the second device via the power line.

The first device or the second device may specifically be a device such as a repeater, and the repeater can be referred to as a repeater.

In addition, the high frequency appearing in the embodiment of the present invention refers to a frequency higher than the intermediate frequency.

In practice, the frequency range of the intermediate frequency may be 3.5-250 MHz, and the selection of the intermediate frequency may depend on at least one of the quality of the power line, the source of the noise, the destination to be reached, the bandwidth, and the like; the frequency range of the high frequency may be 300MHZ-3GHZ, even higher.

FIG. 1 is a schematic structural diagram of a first device 100 and a second device 200 according to an embodiment of the present invention.

Further, the technical solution provided by the embodiment of the present invention can be used in a scenario where an outdoor base station covers an uneven coverage of a mobile signal in an indoor, that is, an area with a good coverage of a mobile signal (such as a balcony) and an area with poor coverage of a mobile signal. (eg, study, bedroom), therefore, it is necessary to introduce a signal with a mobile signal covering a better quality area into a region where the mobile signal covers poor quality to enhance the coverage of the mobile signal in the room. Moreover, the technical solution is mainly applied to the transmission of voice signals.

For example, the first device 100 is located in an area where the mobile signal coverage is better (such as a balcony), and the second device 200 is located in an area where the mobile signal coverage is poor (eg, a study, a bedroom).

Communication is performed between the first device 100 and the second device 200 through a power line. As shown in Figure 1:

The first device 100 includes a receiver 110 for receiving a first high frequency analog signal transmitted by the base station.

The first converter 120 is configured to convert the first high frequency analog signal into the first intermediate frequency analog signal.

The transmitter 130 is configured to send the first intermediate frequency analog signal to the second device by using a power line.

The second device 200 includes a transmitter 210, configured to receive, by the power line, the first intermediate frequency analog signal sent by the first device 100;

The third converter 220 is configured to convert the first intermediate frequency analog signal into a third high frequency analog signal.

The transmitter 230 is configured to send the third high frequency analog signal to the terminal.

For the downlink:

The receiver 110 of the first device 100 receives a signal transmitted from an outdoor base station, such as a first high frequency analog signal. Alternatively, the first high frequency analog signal may be a video signal or a voice signal. The first annunciator 120 of the first device 100 converts the first high frequency analog signal into a first intermediate frequency analog signal and transmits it to the power line through the transmitter 130; through the transmission of the power line, on the other side of the power line, the second device 200 receives the first intermediate frequency analog signal through the transmitter 210, and transmits the first intermediate frequency analog signal to the third converter 220, and the third converter 220 converts the first intermediate frequency analog signal into a third high frequency analog signal, and finally passes The transmitter 230 transmits the third high frequency analog signal for reception by the terminal in the room.

Specifically, the first converter 120 of the first device 100 may include a down converter; the second converter 220 of the second device 200 may include an upconverter.

Optionally, the downconverter and the upconverter may specifically be composed of a mixer and an amplifier.

Optionally, the transmitter 120 and the transmitter 210 are composed of a transformer, a capacitor, and a filter circuit, and the transformer, the capacitor, and the filter circuit may constitute a power line coupled filter circuit module.

Of course, the technical solution of the present invention can be applied not only to the above scenarios, but also to the coverage of the indoor mobile cellular signal by the base station, and can also be applied to other various scenarios to pass the power line. The transmission realizes the enhancement of mobile cellular signal coverage, and there is no limitation here.

Optionally, the second device 200 further includes a receiver 240, configured to receive a fourth high frequency analog signal sent by the terminal.

The fourth converter 250 is configured to convert the fourth high frequency analog signal into a second intermediate frequency analog signal.

The transmitter 210 is further configured to transmit the second intermediate frequency analog signal to the first device 100 through the power line.

The transmitter 130 of the first device 100 is further configured to receive, by the power line, a second intermediate frequency analog signal sent by the second device.

The first device 100 further includes a second converter 140 for converting the second intermediate frequency analog signal into a second high frequency analog signal.

The transmitter 150 is configured to send the second high frequency analog signal to the base station.

For the uplink:

The second device 200 receives a signal transmitted from a certain terminal in the room through the receiver 240, and the signal may be a fourth high frequency analog signal, and the fourth converter 250 of the second device 200 converts the fourth high frequency analog signal into a fourth The second intermediate frequency analog signal is sent to the power line through the transmitter 210; through the transmission of the power line, on the other side of the power line, the first device 100 receives the second intermediate frequency analog signal through the transmitter 130, and transmits the second intermediate frequency analog signal to The second signal converter 140 converts the second intermediate frequency analog signal into a second high frequency analog signal, and finally transmits the second high frequency analog signal through the transmitter 150 for reception by the outdoor base station.

Specifically, the second converter 140 of the first device 100 may include an up-converter to And the fourth converter 250 of the second device 200 can include a downconverter.

Optionally, the downconverter and the upconverter consist of a mixer and an amplifier.

Specifically, when the system composed of the first device 100, the second device 200, and the power line operates in a frequency division duplexing (FDD) mode, in the first device 100, the transmitter 150 and the receiver 110 may be configured. A transceiver, including a duplexer and a radio frequency amplifier, allows the transmit and receive channels to operate in different RF bands. The first converter 120 and the second converter 140 may each be composed of a mixer and an amplifier; the uplink and the downlink may operate in different intermediate frequency bands. The transmitter 130 may be composed of a transformer, a capacitor, and a filter circuit, wherein the transformer may couple the intermediate frequency analog signal to the power line, or may couple the intermediate frequency analog signal from the power line to the inside of the first device 100; the capacitance resonance point may be selected in the middle In the frequency band, the power frequency signal on the power line exhibits an open circuit characteristic to isolate the signal of the power frequency conduction intermediate frequency; the filter filters the related signal to ensure that only the intermediate frequency analog signal is passed. Correspondingly, the second device 200 can also adopt corresponding settings of the first device 100, and details are not described herein again.

When the system composed of the first device 100 and the second device 200 and the power line operates in a time division duplexing (TDD) mode, there is a slight difference from the foregoing FDD mode. For example, the transmitter 150 and the receiver 110 form a transceiver. The duplexer in the device is replaced by a transceiver switch, and the transmitter 130 is composed of a transformer, a capacitor, and a filter circuit, and a transceiver switch is also required. Correspondingly, the second device 200 also makes a corresponding change.

The power line involved in the embodiment of the present invention may be at least one of a phase line, a live line, and a neutral line.

The technical solution provided by the embodiment of the present invention passes through the power line that has been deployed in the site. In combination with the improvement of the internal structure of the first device and the second device, the indoor signal coverage of the mobile cellular network is enhanced conveniently, efficiently, and at low cost. Since the signal transmission attenuation of the power line indoors is significantly lower than the signal transmission attenuation of the power line outdoors, the signal-to-noise ratio of the signal displayed in the simulation experiment after passing through the power line can meet the signal quality requirements of the communication, and at the same time, with the prior art Compared with the coaxial cable used in the mobile phone signal booster, it is not exposed to the user's visibility, thus maintaining a high signal to noise ratio and increasing the user experience. At the same time, the technical solution is applicable to FDD or TDD systems and is convenient for application.

FIG. 2 is a schematic structural diagram of another first device 300 and another second device 400 according to an embodiment of the present invention.

The technical solution provided by the embodiments of the present invention can be used in the interior of a building where there are obstructions such as walls and floors, so as to efficiently transmit data.

Optionally, the first device 300 is connected to a baseband unit (BBU), and there is no obstruction such as a wall or a floor between the two devices, and the second device 400 and the first device 300 and the BBU are present. Covering objects such as walls and floors. That is, the signal coverage of the BBU at the second device 400 is lower than that of the first device 300.

Signal transmission is performed between the first device 300 and the second device 400 through a power line. As shown in FIG. 2, the first device 300 includes:

The receiver 310 is configured to receive the first baseband signal sent by the baseband processor BBU.

The up converter 320 is configured to convert the first baseband signal into the first intermediate frequency analog signal;

The transmitter 330 is configured to send the first intermediate frequency analog signal to the second device 400 by using a power line.

The second device 400 includes:

The transmitter 410 is configured to receive, by using a power line, the first intermediate frequency analog signal sent by the first device 300.

The up-converter 420 is configured to convert the first intermediate frequency analog signal into a first high frequency analog signal.

The transmitter 430 is configured to send the first high frequency analog signal to the terminal.

For the downlink:

The first device 300 can directly receive the first baseband signal transmitted from the BBU through the receiver 310, that is, can be regarded as data that needs to be transmitted to the terminal on the network side, for example, can be a video signal. The upconverter 320 of the first device 300 converts the first baseband signal into a first intermediate frequency analog signal and transmits it to the power line through the transmitter 330; through the transmission of the power line, on the other side of the power line, the second device 400 passes the transmitter The first intermediate frequency analog signal is received by the 410 and transmitted to the upconverter 420 to convert the first intermediate frequency analog signal into the first high frequency analog signal, and finally the first high frequency analog signal is transmitted through the transmitter 430 for indoor or outdoor use. The terminal is receiving.

Optionally, the upconverter 310 and the upconverter 420 are comprised of a mixer and an amplifier.

Optionally, the transmitter 320 and the transmitter 410 are composed of a transformer, a capacitor, and a filter circuit, and the transformer, the capacitor, and the filter circuit may constitute a power line coupled filter circuit module.

Optionally, the second device 400 further includes:

a receiver 440, configured to receive a second high frequency analog signal sent by the user equipment

a down converter 450, configured to convert the second high frequency analog signal into a second intermediate frequency analog signal number.

The transmitter 410 is further configured to transmit the second intermediate frequency analog signal to the first device 300 through the power line.

The transmitter 330 of the first device 300 is further configured to receive, by the power line, a second intermediate frequency analog signal sent by the second device 400;

The first device 300 further includes:

The down converter 340 is configured to convert the second intermediate frequency analog signal into a second baseband signal by using a down converter.

The transmitter 350 is configured to send the second baseband signal to the BBU.

For the uplink:

The second device 400 receives a signal transmitted from a terminal or an outdoor terminal through the receiver 440, for example, data that the mobile phone wants to upload to the network, and can transmit the data to the second device 400. The signal is a second high frequency analog signal, and the down converter 450 of the second device 400 converts the second high frequency analog signal into a second intermediate frequency analog signal and transmits it to the power line through the transmitter 410; through the power line transmission, at the power line On the other side, the first device 300 receives the second intermediate frequency analog signal through the transmitter 330, and transmits it to the down converter 340 to convert the second intermediate frequency analog signal into a second baseband signal, which is then transmitted by the transmitter 350 to the BBU. .

Alternatively, the downconverter 340 and the downconverter 450 are comprised of a mixer and an amplifier.

Of course, the technical solution of the present invention is not limited to the above-mentioned interior of a building having a covering such as a wall or a floor, and can be applied to all scenarios requiring enhanced signal coverage. The scenario pointed out by the technical solution of the present invention is only an example, not Technical solution of the present invention limits.

The technical solution provided by the embodiment of the present invention can also be applied to the FDD mode or the TDD mode. For the refinement of the specific structure of the first device 300, refer to the related description of the first device 100 operating in the FDD or TDD mode in the embodiment of FIG. For the refinement of the specific structure of the second device 400, refer to the related description of the second device 200 in the FDD or TDD mode in the embodiment of FIG. 1 , and details are not described herein again.

The technical solution provided by the embodiment of the present invention improves the indoor signal coverage of the mobile cellular network by using the power line already deployed in the site and the improvement of the internal structure of the first device and the second device, so as to maintain the indoor signal coverage of the mobile cellular network. A higher signal to noise ratio increases the user experience. At the same time, the technical solution is applicable to both FDD or TDD systems, which is convenient for application.

Another embodiment of the present invention is provided below to demonstrate the feasibility of the technical solution of the present invention:

Figure 3(a) shows the approximate attenuation characteristics of power line transmission as a function of frequency. Figure 3(b) shows the approximate noise characteristics of indoor power line transmission and outdoor power line transmission as a function of frequency. It can be seen that the indoor attenuation in the 100 MHz range is Around 25dB, the noise transmitted by the indoor power line in the range of 50MHZ is around -125dBm/Hz.

Take an LTE carrier with an input power of 10dBm and an ideal bandwidth of 20MHZ as an example:

The noise floor is -125dBm/Hz+10*log(20*10^6)=-52dBm;

Indoor power line attenuation: 25dB;

Then the main signal strength after passing the power line: 10dBm-25dB=-15dBm;

Then the signal-to-noise ratio after passing the power line: -15-(-52)=37dB.

Therefore, it is feasible to transmit signals in the uplink or downlink using indoor power lines.

FIG. 4 is a flowchart of a communication method according to an embodiment of the present invention. The method can be implemented by the first device and the second device described in any of the above embodiments. The method includes:

S401. The first device receives the first high frequency analog signal sent by the base station.

S402. The first device converts the first high frequency analog signal into a first intermediate frequency analog signal.

S403. The first device sends the first intermediate frequency analog signal to the second device by using a power line.

S404. The second device receives the first intermediate frequency analog signal sent by the first device by using a power line.

S405. The second device converts the first intermediate frequency analog signal into a third high frequency analog signal.

S406. The second device sends the third high frequency analog signal to the user equipment.

The application scenario of the method is the same as the application scenario of the technical solution of the embodiment of the present invention, that is, the scenario in which the outdoor base station covers the indoor mobile signal is uneven, and is directed to the downlink.

The first device receives the signal sent from the outdoor base station, that is, the first high frequency analog signal. For example, the first high frequency analog signal may be a video signal or a voice signal target transmitted to the indoor terminal for receiving by the user. The first device converts the first high frequency analog signal into a first An intermediate frequency analog signal is sent to the power line; after the power line is transmitted, on the other side of the power line, the second device receives the first intermediate frequency analog signal, converts the first intermediate frequency analog signal into a third high frequency analog signal, and finally transmits Go out so that the terminal in the room can receive the signal.

Optionally, the first device may convert the first high frequency analog signal into a first intermediate frequency analog signal by using a down converter; and the second device may convert the first intermediate frequency analog signal into a third high frequency analog signal by using an up converter. .

Optionally, the downconverter and the upconverter mentioned above are specifically composed of a mixer and an amplifier.

Optionally, in S403, the first device may carry the first intermediate frequency analog signal to the power line for transmission by coupling the first intermediate frequency analog signal to the power line through a transformer, and may The generated noise signal, the first device may also use a filter to filter out the noise signal outside the first intermediate frequency signal. Of course, in order to isolate the power frequency signal on the power line, the first intermediate frequency analog signal that needs to be transmitted to the second device is turned on, and the first device may also use a capacitor to select the resonance point thereof in the intermediate frequency corresponding to the first intermediate frequency analog signal. segment.

Optionally, in S404, the second device may receive, by using a transformer, the first intermediate frequency analog signal sent by the first device from the power line to be coupled to the second device, and receive the first device to send The first intermediate frequency analog signal, and the second device may filter the noise signal of the received signal other than the first intermediate frequency signal by using a filter. In order to isolate the power frequency signal on the power line, the first intermediate frequency analog signal that needs to be transmitted to the second device is turned on, and the second device can also use the capacitor to select the resonance point in the first intermediate frequency simulation. The IF frequency band corresponding to the signal.

Optionally, the method further includes:

S407. The second device receives the fourth high frequency analog signal sent by the user equipment.

S408. The second device converts the fourth high frequency analog signal into a second intermediate frequency analog signal.

S409. The second device sends the second intermediate frequency analog signal to the first device by using a power line.

S410. The first device receives the second intermediate frequency analog signal sent by the second device by using a power line.

S411. The first device converts the second intermediate frequency analog signal into a second high frequency analog signal.

S412. The first device sends a second high frequency analog signal to the base station.

For the uplink, the second device receives a signal sent from a terminal in the room, the signal may be a fourth high frequency analog signal, and the second device converts the fourth high frequency analog signal into a second intermediate frequency analog signal and transmits To the power line; after the power line is transmitted, on the other side of the power line, the first device receives the second intermediate frequency analog signal, converts the second intermediate frequency analog signal into the second high frequency analog signal, and finally transmits it to the outdoor base station. Receive.

Optionally, the second device may convert the fourth high frequency analog signal into a second intermediate frequency analog signal by using a down converter; the first device may convert the second intermediate frequency analog signal into the second high frequency analog signal by using the up converter. .

Optionally, in S409, the second device may perform the second intermediate frequency mode by using a transformer. The second intermediate frequency analog signal is transported to the power line for transmission in a manner that the pseudo signal is coupled to the power line, and the optional filter in the second device in S404 can also be used to filter out noise outside the second intermediate frequency analog signal. Similarly, the optional capacitor in S404 can also select to resonate in the intermediate frequency band corresponding to the second intermediate frequency analog signal.

Optionally, in S410, the first device may receive, by using a transformer, the second intermediate frequency analog signal sent by the second device from the power line to be coupled to the first device, and receive and send the second device. The second intermediate frequency analog signal, and the optional filter in the first device in S403 can also filter out the noise signal except the second intermediate frequency signal of the received signal. Similarly, the optional capacitor in S403 can also select to resonate in the intermediate frequency band corresponding to the second intermediate frequency analog signal.

According to the technical solution provided by the embodiment of the present invention, the signal of the outdoor signal or the strong signal coverage is introduced into the weak position through the wired transmission mode through the power line already deployed in the site, and then transmitted wirelessly, so that the mobile cellular network indoor signal is transmitted. Coverage is enhanced, convenient, efficient, and low-cost. Compared with existing coaxial transmission methods, it maintains a high signal-to-noise ratio and increases the user experience.

FIG. 5 is a flowchart of another communication method according to an embodiment of the present invention. The execution body of the method is the first device 300 and the second device 400 shown in FIG. 2 . The method includes:

S501. The first device receives the first baseband signal sent by the baseband processing unit BBU.

S502. The first device converts the first baseband signal into a first intermediate frequency analog signal by using an upconverter.

S503. The first device sends the first intermediate frequency analog signal to the second device by using a power line.

S504. The second device receives the first intermediate frequency analog signal sent by the first device by using a power line.

S505. The second device converts the first intermediate frequency analog signal into a first high frequency analog signal by using an upconverter.

S506. The second device sends the first high frequency analog signal to the user equipment.

The application scenario of the method is the same as the application scenario of the technical solution of the embodiment of the present invention. It can be used inside a building where there are obstructions such as walls and floors, and is directed to the downlink.

The first device can directly receive the first baseband signal transmitted from the BBU, that is, can be regarded as data that needs to be transmitted to the terminal on the network side, for example, can be a video signal. The first device converts the first baseband signal into a first intermediate frequency analog signal by an upconverter and sends the signal to the power line; and on the other side of the power line, the second device receives the first intermediate frequency analog signal through the power line transmission, and The first intermediate frequency analog signal is converted into a first high frequency analog signal by an up-converter, and finally transmitted for indoor or outdoor user equipment to receive.

Optionally, in S503, the first device may carry the first intermediate frequency analog signal to the power line for transmission by coupling the first intermediate frequency analog signal to the power line through a transformer, and may filter out the up-conversion process. Generated noise signal, first set A filter can also be used to filter out noise signals other than the first intermediate frequency signal. Of course, in order to isolate the power frequency signal on the power line, the first intermediate frequency analog signal that needs to be transmitted to the second device is turned on, and the first device may also use a capacitor, and the resonance point thereof is selected in the intermediate frequency band corresponding to the first intermediate frequency analog signal. .

Optionally, in S504, the second device may receive, by using a transformer, the first intermediate frequency analog signal sent by the first device from the power line to be received in the second device, and receive the first device to send The first intermediate frequency analog signal, and the second device may filter the noise signal of the received signal other than the first intermediate frequency signal by using a filter. In order to isolate the power frequency signal on the power line, the first intermediate frequency analog signal that needs to be transmitted to the second device is turned on, and the second device may also use a capacitor to select its resonance point in the intermediate frequency band corresponding to the first intermediate frequency analog signal.

Optionally, the method further includes:

S507. The second device receives the second high frequency analog signal sent by the user equipment.

S508. The second device converts the second high frequency analog signal into a second intermediate frequency analog signal by using a down converter.

S509. The second device sends the second intermediate frequency analog signal to the first device by using the power line.

S510. The first device receives the second intermediate frequency analog signal sent by the second device by using the power line.

S511. The first device converts the second intermediate frequency analog signal into a second baseband signal by using a down converter.

S512. The first device sends the second baseband signal to the BBU.

For the uplink, the second device receives a signal transmitted from a terminal indoors or outdoors, for example, data that the mobile phone wants to upload to the network, and can transmit the data to the second device. The signal is a second high frequency analog signal, and the second device converts the second high frequency analog signal into a second intermediate frequency analog signal through a downconverter and sends it to the power line; after the power line is transmitted, on the other side of the power line, A device receives the second intermediate frequency analog signal, and converts the second intermediate frequency analog signal to a second baseband signal through the downconverter, and then transmits the signal to the BBU by the transmitting unit 350.

Optionally, the downconverter mentioned above consists of a mixer and an amplifier.

Optionally, in S509, the second device may carry the second intermediate frequency analog signal to the power line for transmission by coupling the second intermediate frequency analog signal to the power line by using a transformer, and the second device is optional in S504. The filter can also be used to filter out noise outside the second IF analog signal. Similarly, the optional capacitor in S504 can also select to resonate in the intermediate frequency band corresponding to the second intermediate frequency analog signal.

Optionally, in S510, the first device may receive, by using a transformer, the second intermediate frequency analog signal sent by the second device from the power line to be coupled to the first device, and receive and send the second device. The second intermediate frequency analog signal, and the optional filter in the first device in S503 can also filter out the noise signal other than the second intermediate frequency signal of the received signal. Similarly, the optional capacitor in S503 can also select to resonate in the intermediate frequency band corresponding to the second intermediate frequency analog signal.

The technical solution provided by the embodiment of the present invention passes through the power line that has been deployed in the site. The signal with strong coverage of the indoor signal is introduced into the weak position by means of wired transmission and then transmitted wirelessly, so that the indoor signal coverage of the mobile cellular network can be enhanced conveniently, efficiently and at low cost, and the existing coaxial transmission is carried out. Compared with the method, it maintains a high signal-to-noise ratio and increases the user experience.

Those skilled in the art can understand and implement all the processes in the above embodiments. They can all be implemented by computer program instructions in conjunction with related hardware.

In the solution provided by the embodiment of the present invention, the “first”, “second”, “third”, “fourth” and the like only mean distinguishing different objects, such as different signals, different functions, and There are no substantive limitations.

The definitions of the application scenarios and the like in the above embodiments are only for explaining the specific technical solutions of the present invention, and are not limited thereto. That is, it is possible to modify the technical solutions described in the foregoing embodiments, or to replace the technical features therein, and the modifications and substitutions do not affect the scope of protection of the present invention.

Claims

A communication method, characterized in that the method comprises:

The first device receives the first high frequency analog signal sent by the base station;

The first device converts the first high frequency analog signal into a first intermediate frequency analog signal;

Transmitting, by the first device, the first intermediate frequency analog signal to a second device by using a power line;

The frequency of the first high frequency analog signal is higher than the frequency of the first intermediate frequency analog signal.
The method of claim 1 wherein the method further comprises:

Receiving, by the first device, the second intermediate frequency analog signal sent by the second device by using the power line;

The first device converts the second intermediate frequency analog signal into a second high frequency analog signal;

Transmitting, by the first device, the second high frequency analog signal to the base station;

The frequency of the second high frequency analog signal is higher than the second intermediate frequency analog signal.
The method according to claim 1 or 2, wherein the signal strength of the base station at the first device is higher than the signal strength of the base station at the second device.
The method of claim 3, wherein the converting, by the first device, the first high frequency analog signal to the first intermediate frequency analog signal is:

The first device converts the first high frequency analog signal into a first intermediate frequency analog signal through a downconverter.
The claim of any of claims 4, wherein said first The device converts the second intermediate frequency analog signal into a second high frequency analog signal, specifically:

The first device converts the second intermediate frequency analog signal into a second high frequency analog signal through an upconverter.
The method according to claim 1 or 2, wherein the transmitting, by the first device, the first intermediate frequency analog signal to the second device by using a power line is:

The first device couples the first intermediate frequency analog signal to the power line through a transformer, and then transmits the power to the second device through the power line.
The method according to claim 6, wherein the receiving, by the first device, the second intermediate frequency analog signal sent by the second device by using the power line is:

The first device couples the second intermediate frequency analog signal transmitted by the second device through the power line from the power line to the first device through the transformer.
A first device, wherein the first device comprises:

a receiver, configured to receive a first high frequency analog signal sent by the base station;

a first converter for converting the first high frequency analog signal into the first intermediate frequency analog signal;

a transmitter, configured to send the first intermediate frequency analog signal to the second device by using a power line;

The frequency of the first high frequency analog signal is higher than the frequency of the first intermediate frequency analog signal.
A first device according to claim 8 wherein:

The transmitter is further configured to receive, by the power line, a second intermediate frequency analog signal sent by the second device;

The first device further includes a second converter for converting the second intermediate frequency analog signal into a second high frequency analog signal;

a transmitter, configured to send the second high frequency analog signal to the base station;

The frequency of the second high frequency analog signal is higher than the frequency of the second intermediate frequency analog signal.
The first device according to claim 8 or 9, wherein the signal strength of the base station at the first device is higher than the signal strength of the base station at the second device.
The first device according to claim 10, wherein the first converter comprises a down converter, specifically for converting the first high frequency analog signal into a first intermediate frequency analog signal by a downconverter.
The first device of claim 11, wherein the second converter comprises an upconverter, specifically for converting the second intermediate frequency analog signal into a second high frequency analog signal by an upconverter.
A first device according to claim 8 or 9, wherein said transmitter comprises: a transformer, a filter and a capacitor;

The filter is configured to filter out a noise signal outside the first intermediate frequency analog signal after the first converter converts the first high frequency analog signal into the first intermediate frequency analog signal;

The transformer, configured to couple the first intermediate frequency analog signal after passing the filter to the power line, and then send the power line to the second device;

The capacitor is configured to isolate a power frequency signal on the power line and turn on the first intermediate frequency analog signal when the first intermediate frequency analog signal is sent by the power line to the second device.
A first device according to claim 13 wherein:

The capacitor is further configured to isolate a power frequency signal on the power line and turn on the second intermediate frequency analog signal when the second intermediate frequency analog signal is sent by the power line to the first device.

The transformer is further configured to couple the second intermediate frequency analog signal sent by the second device through the power line from the power line to the first device;

The filter is further configured to filter out a noise signal other than the second intermediate frequency analog signal.
A communication method, characterized in that the method comprises:

The second device receives the first intermediate frequency analog signal sent by the first device by using the power line;

The second device converts the first intermediate frequency analog signal into a third high frequency analog signal;

The second device sends the third high frequency analog signal to the terminal;

The frequency of the third high frequency analog signal is higher than the frequency of the first intermediate frequency analog signal.
The method of claim 15 wherein the method further comprises:

The second device receives a fourth high frequency analog signal sent by the terminal;

The second device converts the fourth high frequency analog signal into a second intermediate frequency analog signal;

Transmitting, by the second device, the second intermediate frequency analog signal to the first device by using the power line;

The frequency of the fourth high frequency analog signal is higher than the frequency of the second intermediate frequency analog signal.
The method according to claim 15 or 16, wherein the signal strength of the base station at the second device is lower than the signal strength of the base station at the first device; wherein the base station is configured to communicate with the terminal .
The method according to claim 17, wherein the converting, by the second device, the first intermediate frequency analog signal into a third high frequency analog signal is:

The second device converts the first intermediate frequency analog signal into a third high frequency analog signal through an upconverter.
The invention as claimed in claim 18, wherein the converting, by the second device, the fourth high frequency analog signal into the second intermediate frequency analog signal is:

The second device converts the fourth high frequency analog signal into a second intermediate frequency analog signal through a downconverter.
The method according to claim 15 or 16, wherein the receiving, by the second device, the first intermediate frequency analog signal sent by the first device by using a power line is:

The second device couples the first intermediate frequency analog signal transmitted by the first device to the second device from the power line through a transformer.
The method of claim 20, wherein the transmitting, by the second device, the second intermediate frequency analog signal to the first device by using the power line is:

The second device couples the second intermediate frequency analog signal to the power line through the transformer, and then transmits the power to the first device through the power line.
A second device, the second device comprising:

a transmitter, configured to receive, by the power line, a first intermediate frequency sent by the first device Analog signal

a third converter, configured to convert the first intermediate frequency analog signal into a third high frequency analog signal;

a transmitter, configured to send the third high frequency analog signal to the terminal;

The frequency of the third high frequency analog signal is higher than the frequency of the first intermediate frequency analog signal.
The second device of claim 22, wherein the second device further comprises:

a receiver, configured to receive a fourth high frequency analog signal sent by the terminal;

a fourth converter for converting the fourth high frequency analog signal into the second intermediate frequency analog signal;

The transmitter is further configured to send the second intermediate frequency analog signal to the first device by using the power line;

The frequency of the fourth high frequency analog signal is higher than the frequency of the second intermediate frequency analog signal.
A second device according to claim 22 or 23, wherein the signal strength of the base station at the second device is lower than the signal strength of the base station at the first device; wherein the base station is for use with the terminal Implement communication.
The second device according to claim 24, wherein the third converter comprises an upconverter, specifically for converting the first intermediate frequency analog signal into a third high frequency analog signal by an upconverter.
A second device according to claim 25, wherein said fourth turn The converter includes a down converter, specifically for converting the fourth high frequency analog signal into a second intermediate frequency analog signal by a down converter.
A second device according to claim 22 or 23, wherein said transmitter comprises: a transformer, a filter and a capacitor;

The capacitor is configured to isolate a power frequency signal on the power line and turn on the first intermediate frequency analog signal when the first intermediate frequency analog signal is sent by the power line to the second device.

The transformer, configured to couple the first intermediate frequency analog signal sent by the first device to the second device from the power line;

The filter is configured to filter out a noise signal other than the first intermediate frequency analog signal.
A second device according to claim 27, wherein

The filter is further configured to: after the fourth converter converts the fourth high frequency analog signal into the second intermediate frequency analog signal, filtering out the noise signal outside the second intermediate frequency analog signal;

The transformer is further configured to couple the second intermediate frequency analog signal through the filter to the power line, and then transmit the power to the first device through the power line;

The capacitor is further configured to isolate a power frequency signal on the power line and turn on the second intermediate frequency analog signal on a power line when the second intermediate frequency analog signal is sent by the power line to the first device .
A communication method, characterized in that the method comprises:

The first device receives the first baseband signal sent by the baseband processing unit BBU;

The first device converts the first baseband signal into a first intermediate frequency analog signal by using an upconverter;

Transmitting, by the first device, the first intermediate frequency analog signal to the second device by using a power line;

The frequency of the first baseband signal is lower than the frequency of the first intermediate frequency analog signal.
The method of claim 29, wherein the method further comprises:

Receiving, by the first device, the second intermediate frequency analog signal sent by the second device by using the power line;

The first device converts the second intermediate frequency analog signal into a second baseband signal by a down converter;

The first device sends the second baseband signal to the BBU;

The frequency of the second baseband signal is lower than the frequency of the second intermediate frequency analog signal.
The method of claim 29 or 30, wherein the signal strength of the BBU at the first device is higher than the signal strength of the BBU at the second device.
The method of claim 31, wherein the transmitting, by the first device, the first intermediate frequency analog signal to the second device by using a power line is:

The first device couples the first intermediate frequency analog signal to the power line through a transformer, and then transmits the power to the second device through the power line.
The method according to claim 32, wherein the receiving, by the first device, the second intermediate frequency analog signal sent by the second device by using the power line is:

The first device couples a second intermediate frequency analog signal transmitted by the second device from the power line to the first device through the transformer.
A first device, wherein the first device comprises:

a receiver, configured to receive a first baseband signal sent by the baseband processing unit BBU;

An up converter for converting the first baseband signal into a first intermediate frequency analog signal;

a transmitter, configured to send the first intermediate frequency analog signal to the second device by using a power line;

The frequency of the first baseband signal is lower than the frequency of the first intermediate frequency analog signal.
A first device according to claim 34, wherein

The transmitter is further configured to receive, by the power line, a second intermediate frequency analog signal sent by the second device;

The first device further includes:

a down converter for converting the second intermediate frequency analog signal into a second baseband signal;

a transmitter, configured to send the second baseband signal to the BBU;

The frequency of the second baseband signal is lower than the frequency of the second intermediate frequency analog signal.
A first device according to claim 34 or 35, wherein the signal strength of the BBU at the first device is higher than the signal strength of the second device.
A first device according to claim 36, wherein said transmitter comprises: a transformer, a filter and a capacitor;

The filter is configured to filter out a noise signal outside the first intermediate frequency analog signal after the upconverter converts the first baseband signal into a first intermediate frequency analog signal;

The transformer is configured to pass the first intermediate frequency analog signal after passing the filter Coupled to the power line, and then sent to the second device through the power line;

The capacitor is configured to isolate a power frequency signal on the power line and turn on the first intermediate frequency analog signal when the first intermediate frequency analog signal is sent by the power line to the second device.
A first device according to claim 37, wherein

The capacitor is further configured to isolate a power frequency signal on the power line and turn on the second intermediate frequency analog signal when the second intermediate frequency analog signal is sent by the power line to the first device.

The transformer is further configured to couple a second intermediate frequency analog signal sent by the second device to the first device from the power line;

The filter is further configured to filter out a noise signal other than the second intermediate frequency analog signal.
A communication method, characterized in that the method comprises:

Receiving, by the second device, the first intermediate frequency analog signal sent by the first device by using a power line;

The second device converts the first intermediate frequency analog signal into a first high frequency analog signal through an upconverter;

The second device sends the first high frequency analog signal to a terminal;

The frequency of the first high frequency analog signal is higher than the frequency of the first intermediate frequency analog signal.
The method of claim 39, wherein the method further comprises:

The second device receives a second high frequency analog signal sent by the terminal;

The second device converts the second high frequency analog signal into a first Two intermediate frequency analog signals;

Transmitting, by the second device, the second intermediate frequency analog signal to the first device by using the power line;

The frequency of the second high frequency analog signal is higher than the frequency of the second intermediate frequency analog signal.
The method according to claim 39 or 40, wherein the signal strength of the BBU at the second device is lower than the signal strength of the BBU at the first device; wherein the BBU is used to implement with the terminal Communication.
The method according to claim 41, wherein the receiving, by the second device, the first intermediate frequency analog signal sent by the first device by using a power line is:

The second device receives, by the transformer, the first intermediate frequency analog signal transmitted by the first device from the power line to the second device.
The method of claim 42, wherein the transmitting, by the second device, the second intermediate frequency analog signal to the first device by using the power line is:

The second device couples the second intermediate frequency analog signal to the power line through the transformer, and then transmits the power to the first device through the power line.
A second device, the second device comprising:

a transmitter, configured to receive, by using a power line, a first intermediate frequency analog signal sent by the first device;

An up converter for converting the first intermediate frequency analog signal into a first high frequency analog signal;

a transmitter, configured to send the first high frequency analog signal to the terminal;

Wherein the frequency of the first high frequency analog signal is higher than the first intermediate frequency analog signal Frequency of.
The second device of claim 44, wherein the second device further comprises:

a receiver, configured to receive a second high frequency analog signal sent by the terminal;

a down converter for converting the second high frequency analog signal into a second intermediate frequency analog signal;

The transmitter is further configured to send the second intermediate frequency analog signal to the first device by using the power line;

The frequency of the second high frequency analog signal is higher than the frequency of the second intermediate frequency analog signal.
A second device according to claim 44 or 45, wherein the signal strength of the BBU at the second device is lower than the signal strength of the BBU at the first device; wherein the BBU is used for The terminal implements communication.
A second device according to claim 46, wherein said transmitter comprises: a transformer, a filter and a capacitor;

The capacitor, when the first intermediate frequency analog signal is sent by the power line to the second device, isolating a power frequency signal on the power line, isolating a power frequency signal on the power line, and turning on the The first intermediate frequency analog signal.

The transformer, configured to receive, from the power line, the first intermediate frequency analog signal sent by the first device into the second device;

The filter is configured to filter out a noise signal other than the first intermediate frequency analog signal.
A second device according to claim 47, wherein

The filter is further configured to rotate the second high frequency analog signal at the down converter After being replaced by the second intermediate frequency analog signal, filtering out the noise signal outside the second intermediate frequency analog signal;

The transformer is further configured to couple the second intermediate frequency analog signal passing through the filter to the power line, and then send the power line to the first device;

The capacitor is further configured to isolate a power frequency signal on the power line and turn on the second intermediate frequency analog signal on a power line when the second intermediate frequency analog signal is sent by the power line to the first device .