WO2022002099A1

WO2022002099A1 - Standing wave detection method, standing wave detection apparatus, and network device

Info

Publication number: WO2022002099A1
Application number: PCT/CN2021/103365
Authority: WO
Inventors: 原亚运; 吴广德; 韦兆碧; 王珊
Original assignee: 中兴通讯股份有限公司
Priority date: 2020-06-30
Filing date: 2021-06-30
Publication date: 2022-01-06
Also published as: CN113949465A

Abstract

The present application provides a standing wave detection method and a standing wave detection apparatus for a network device, and a network device. The standing wave detection method comprises: measuring a power level of a reflected signal and a power level of a forward signal of a network device; and obtaining, according to the measured power level of the reflected signal and power level of the forward signal, standing wave ratios corresponding to a plurality of transmit channels of the network device. Steps for measuring a power level of a reflected signal comprises: sending standing wave detection signals through a plurality of transmit channels of a network device; and obtaining a power level of a reflected signal through a plurality of receive channels of the network device. Steps for measuring a power level of a forward signal comprises: controlling a plurality of transmit channels of a network device to send standing wave detection signals; and controlling a receive channel to obtain a power level of a forward signal via an antenna calibration network.

Description

Standing wave detection method, standing wave detection device and network equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application No. 202010616791.6 filed on June 30, 2020, the entire contents of which are incorporated herein by reference.

technical field

The present disclosure relates to the field of communication technology.

Background technique

Base Station (Base Station) refers to a radio transceiver station that transmits information with a mobile phone terminal through a mobile communication switching center in a certain radio coverage area. With the rapid development of communication technology and the arrival of the 5G communication era, the number of transmission and reception channels of the base station has increased by dozens of times compared with the past, and the corresponding control circuits and detection circuits of each channel have also increased, making the internal equipment structure of the base station complicated. , the space utilization rate is low.

Therefore, how to simplify the circuit structure of the base station and improve the space utilization rate of the base station has become an urgent technical problem to be solved in the art.

SUMMARY OF THE INVENTION

As a first aspect of the present disclosure, there is provided a standing wave detection method of a network device, comprising: detecting a power level of a reflected signal (REV); detecting a power level of a forward signal (FWD); The power level of the reflected signal and the power level of the forward signal obtain the standing wave ratio corresponding to the multiple transmission channels of the network device, wherein the step of detecting the power level of the reflected signal includes: The multiple transmission channels of the network device send out standing wave detection signals; and the power level of the reflected signal is acquired through the multiple reception channels of the network device; the step of detecting the power level of the forward signal The method includes: controlling multiple transmit channels of the network device to send standing wave detection signals, and controlling one of the multiple receive channels to obtain the power level of the forward signal through an antenna calibration network.

As a second aspect of the present disclosure, there is provided a standing wave detection apparatus for a network device, including: a storage medium, in which an executable program is stored; one or more processors, the one or more processing The controller can call the executable program to implement the standing wave detection method described above.

As a third aspect of the present disclosure, a network device is provided, including an antenna calibration network, a standing wave detection device, a plurality of transmission channels and a plurality of reception channels, wherein the antenna calibration network is connected to the plurality of reception channels , the standing wave detection device is the aforementioned standing wave detection device.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and together with the following detailed description, are used to explain the present disclosure, but not to limit the present disclosure. In the attached image:

1 is a schematic diagram of the connection relationship between a receiving and sending channel and a detection channel in the related art;

2 is a schematic diagram of the connection relationship between a plurality of receiving and sending channels and detection channels in the related art;

3 is a schematic diagram of the principle of implementing standing wave detection by receiving and transmitting channels and an antenna calibration network according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another principle of implementing standing wave detection through receiving and transmitting channels and an antenna calibration network according to an embodiment of the present disclosure.

detailed description

The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, but not to limit the present disclosure.

In order to detect the performance of the base station in real time, it is often necessary to perform standing wave detection on the base station, that is, send a continuous sine wave (ie standing wave detection signal) or a single tone signal through the transmission channel of the base station, receive the reflected wave, and according to the forward signal FWD and The reflected signal REV is processed and analyzed to obtain information such as the standing wave ratio, and then the connection situation of the antenna-feeder cable and the fault situation of the base station.

In the existing base station standing wave detection scheme, the standing wave detection signal is sent by the transmit channel TX, while the forward signal FWD and the reflected signal REV are both acquired by a separate detection channel ORX. As shown in Figure 1, the detection channel ORX obtains the forward signal FWD through the forward signal acquisition device, the reflected signal REV received by the receiving channel RX1 is transferred to the detection channel ORX through the switch, and the detection channel ORX receives the reflected signal REV and the forward signal in turn through the switch. to signal FWD.

In the related art, the number of detection channels used by the detection channel ORX is usually small. However, with the advent of the 5G communication era, the number of transmission and reception channels of the base station has greatly increased compared with the previous ones. As shown in FIG. 2 , if the existing standing wave detection scheme is still used, the reflected signal REV detection circuit and switch corresponding to the detection channel ORX will occupy a huge space, and the detection time will be long and the detection efficiency will be low.

In order to solve the above technical problems, as an aspect of the present disclosure, a method for detecting standing waves of a network device (eg, a base station) is provided, including the following steps S1 to S3:

In step S1, the power level of the reflected signal REV is detected;

In step S2, the power level of the forward signal FWD is detected;

In step S3, according to the detected power level of the reflected signal REV and the power level of the forward signal FWD, the standing wave ratios corresponding to the multiple transmission channels TX of the network device are obtained.

Wherein, the step S1 of detecting the power level of the reflected signal REV includes the following steps S11 to S12:

In step S11, a standing wave detection signal is sent through a plurality of transmission channels TX of the network device; and,

In step S12, obtain the power level of the reflected signal REV through multiple receiving channels RX of the network device;

The step S2 of detecting the power level of the forward signal FWD includes:

In step S21, control multiple transmission channels TX of the network device to send standing wave detection signals; and,

In step S22, one of the receiving channels RX is controlled to obtain the power level of the forward signal FWD through the antenna calibration network (AC network) of the network device.

FIG. 3 shows a circuit connection method corresponding to a radio frequency interface of the network device when the standing wave detection method provided by the present disclosure is used to detect the network device. The network device includes multiple transmit channels TX and multiple receive channels RX. For each radio frequency interface, there is one transmit channel TX and one receive channel RX corresponding to it.

In the present disclosure, the receiving channel RX is also multiplexed to obtain the power level of the reflected signal REV in the standing wave detection in addition to the normal signal receiving work, and the antenna calibration network is also multiplexed to obtain each The power level of the forward signal FWD corresponding to each radio frequency interface. That is, in the present disclosure, by multiplexing the receiving channel RX and the antenna calibration network, the solution of using the detection channel ORX to realize the standing wave detection in the related art is replaced, and the detection channel ORX and the detection channel in the network device (eg, the base station) are omitted. The corresponding circuit structure of the signal acquisition device and switching device of the ORX simplifies the device structure of the network equipment, improves the utilization rate of the network equipment space, and reduces the wiring area and cost of the network equipment.

Moreover, as shown in FIG. 4 , since the number of receiving channels RX corresponds to the number of transmitting channels TX, multiple receiving channels RX can simultaneously receive the power levels of the reflected signals REV corresponding to multiple radio frequency interfaces without passing the switch structure shown in FIG. 2 . The channels are switched one by one, thereby improving the standing wave detection efficiency of network equipment and enabling efficient detection of network equipment (eg, 5G base stations).

The embodiments of the present disclosure do not specifically limit the number of receive channels RX and transmit channels TX. For example, as shown in FIG. 4 , the network device may include 64 receive channels RX (RX1 to RX64) and 64 transmit channels TX (TX1) to TX64), corresponding to 64 RF interfaces (RF interface 1 to RF interface 64).

It should be noted that the antenna calibration network is an n-in-one calibration network for compensating for the phase and amplitude difference between radio paths, and the embodiments of the present disclosure do not make any difference to how the antenna calibration network obtains the power level of the forward signal FWD. Specifically defined, for example, as shown in FIG. 3 , the antenna calibration network is connected to a channel corresponding to each radio frequency interface through a plurality of forward signal acquisition devices 23 . As shown in FIG. 4 , the forward signal acquisition device 23 may be a coupler.

The embodiments of the present disclosure do not specifically limit how the transmit channel TX and the receive channel RX are connected to the radio frequency interface of the network device. For example, in some embodiments, as shown in FIG. 3 and FIG. 4 , the network device further includes a plurality of circulators 30 , and both the transmit channel TX and the receive channel RX can communicate with all the circulators 30 through the circulators 30 . Connect the radio frequency interface of the network equipment. The standing wave detection signal sent by the transmission channel TX can be unidirectionally transmitted to the radio frequency interface of the network device through the circulator 30, and the power level of the reflected signal REV returned by the radio frequency interface of the network device can pass through the radio frequency interface of the network device. The circulator 30 transmits unidirectionally to the transmit channel TX.

As shown in FIG. 3 and FIG. 4 , in an optional implementation manner, a receiving channel RX1 can selectively conduct with the antenna calibration network or the radio frequency interface of the network device through the first selection switch 11 . Correspondingly, the step S1 of detecting the power level of the forward signal FWD further includes, before sending the standing wave detection signal: controlling the one receiving channel RX1 to conduct with the antenna calibration network (that is, controlling the first selection switch 11 to The receiving channel RX1 is connected to the antenna calibration network); the step S2 of detecting the power level of the reflected signal REV also includes, before sending the standing wave detection signal: controlling a plurality of the receiving channels RX to pass through the corresponding circulators 300 and corresponding The radio frequency interface is turned on (that is, control the selection switches corresponding to the receiving channels RX1 to RX64 (see Figure 4), and connect the receiving channels RX1 to RX64 with the corresponding radio frequency interface, so as to realize that all the receiving channels RX are connected to the corresponding radio frequency interface turn on).

Alternatively, in another optional embodiment, the step S2 of detecting the power level of the reflected signal REV further includes, before sending the standing wave detection signal: controlling a plurality of the receiving channels RX to calibrate with the antenna The network is turned on (ie, the first selection switch 11 is controlled to connect the corresponding receiving channel RX to the antenna calibration network, so that all the receiving channels RX are connected to the antenna calibration network). The step S1 of detecting the power level of the FWD also includes, before sending the standing wave detection signal: controlling a receiving channel RX (that is, the receiving channel RX connected to the first selection switch 11 ) to communicate with the network through the circulator 30 The RF interface of the device is turned on.

The embodiment of the present disclosure does not specifically limit how to obtain the standing wave ratios corresponding to the multiple transmit channels TX (or multiple radio frequency interfaces). For example, in some embodiments, the step S3 of obtaining the standing wave ratios corresponding to the multiple transmission channels TX of the network device may include the following steps S31 to S33:

In step S31, the forward detection power linearity value is obtained from the power of the forward signal FWD, and the reverse detection power linearity value is obtained from the power of the reflected signal REV.

In step S32, a reflection coefficient is obtained according to the linear value of the forward detection power and the linear value of the reverse detection power.

In step S33, the standing wave ratio of the network device is obtained according to the reflection coefficient.

Wherein, in step S31, the power of the forward signal FWD is obtained from the receiving channel RX gain of the antenna calibration network and the power level of the detected forward signal FWD, and the power of the reflected signal REV is obtained by The gain of each receive channel is obtained from the transmit channel TX gain of the antenna calibration network and the power level of the detected reflected signal REV, specifically:

The power of the forward signal FWD can be obtained by the calculation formula P _f =P _acrx (i)-G _acrx , where P _acrx (i) is the power level of the detected FWD, G _acrx is the gain of the receiving channel RX, i Indicates the channel number.

The power of the reflected signal REV is obtained by the calculation formula P _r =P _rx '(i)-G _rx (i), where P _rx '(i) is the detected power level of the reflected signal REV, and G _rx (i ) is the receive channel RX gain of the reflected signal REV.

In some embodiments, the standing wave detection method further includes the step S0 of acquiring the standing wave signal level to calibrate the standing wave detection signal, including the following steps S01 and S02:

In step S01, a transmission channel TX of the network device is controlled to send out a standing wave detection signal (the power is denoted as P _actx ).

In step S02, multiple receiving channels RX of the network device are controlled to obtain the standing wave signal level (the power is recorded as an array P _rx (i)) through the antenna calibration network.

Both P(i) and P _actx are used to calibrate the standing wave detection signal, and the receiving channel RX gain G _rx (i) of the reflected signal REV is calculated by the formula G _rx (i)=P _rx (i)-(P _actx + G _actx ) is obtained, wherein P _rx (i) is the power of the standing wave signal level detected by the multiple receiving channels through the antenna calibration network, and P _actx is the power of the standing wave detection signal sent by the transmitting channel power, G _actx is the transmit channel gain of the antenna calibration network.

The transmit channel TX gain G _actx of the antenna calibration network and the receive channel RX gain G _{acrx of} the antenna calibration network are both measured in the production testing stage.

Optionally, in step S31, the calculation formula for calculating the linear value of the forward detection power and the linear value of the reverse detection power is as follows:

Forward detection power linear value:

Reverse detection power linear value:

In step S32, the calculation formula for calculating the reflection coefficient is as follows:

Reflection coefficient:

In step S33, the formula for calculating the standing wave ratio of the network device is as follows:

Standing wave ratio:

Substitute the previous formula into the standing wave ratio formula to get:

Standing wave ratio:

in,

P _r -P _f =P _rx (i)-G _rx (i)-[P _acrx (i)-G _acrx ], it should be noted that, in all the preceding calculation formulas, i represents the channel number. For example, when the network device includes 64 radio frequency interfaces and corresponding 64 receiving channels RX and 64 transmitting channels TX, i can take 1 to 64, and finally the value of the standing wave ratio VSWR corresponding to the 64 channels can be calculated.

As a second aspect of the present disclosure, there is also provided a standing wave detection apparatus for a network device, including: a storage medium, in which an executable program is stored; one or more processors, the one or more The processor can call the executable program to implement the standing wave detection method described in the previous embodiment. Therefore, by multiplexing the receiving channel RX and the antenna calibration network, instead of using the detection channel ORX to realize the standing wave detection scheme in the related art, the structure of the network equipment is simplified, the wiring area and cost of the network equipment are reduced, and the performance of the network equipment is improved. Standing wave detection efficiency.

As a third aspect of the present disclosure, a network device is also provided, including an antenna calibration network, a standing wave detection device, multiple transmit channels TX and multiple receive channels RX, the antenna calibration network and the multiple receive channels connected, the standing wave detection device is the standing wave detection device described in the previous embodiment.

In the network device provided by the present disclosure, the receiving channel RX is also used to obtain the power level of the reflected signal REV in the standing wave detection in addition to the normal signal receiving work. In addition to the normal calibration function, the antenna calibration network also Used to obtain the power level of the forward signal FWD corresponding to each radio interface. That is, in the present disclosure, by multiplexing the receiving channel RX and the antenna calibration network, the solution of using the detection channel ORX to realize standing wave detection in the related art is replaced, and the detection channel ORX in the network device and the detection channel ORX used by the transmitter are omitted. Corresponding circuit structures such as signal acquisition device and switch device for channel TX and receiving channel RX to acquire signals, thereby simplifying the device structure of network equipment, improving the utilization rate of network equipment space, and reducing the wiring area and cost of network equipment.

In addition, since the number of receiving channels RX corresponds to the number of transmitting channels TX, multiple receiving channels RX can simultaneously receive the power level of the reflected signal REV corresponding to multiple radio frequency interfaces, which improves the standing wave detection efficiency of network equipment and can achieve high efficiency of network equipment. detection.

This embodiment of the present disclosure does not specifically limit the type of the network device, for example, the network device may be a base station (eg, a 5G base station). This embodiment of the present disclosure does not specifically limit how the antenna calibration network acquires the power level of the forward signal FWD. For example, as shown in FIG. 3 , the antenna calibration network is connected to a channel corresponding to each radio frequency interface through a plurality of forward signal acquisition devices 23 . As shown in FIG. 4 , the forward signal acquisition device 23 may be a coupler.

The embodiments of the present disclosure do not specifically limit how the transmit channel TX and the receive channel RX are connected to the radio frequency interface of the network device. For example, as shown in FIG. 3 and FIG. 4 , the network device further includes a first selection switch, the first selection switch 11 is connected to a receiving channel RX, and the receiving channel RX is selectively connected to the receiving channel RX through the first selection switch 11 . The antenna calibration network or the radio frequency interface of the network device is connected. The network device further includes a plurality of circulators 30 , and each of the transmit channels TX and each of the receive channels RX is connected to the radio frequency interface of the network device through the corresponding circulator 30 . The standing wave detection signal sent by the transmission channel TX can be unidirectionally transmitted to the radio frequency interface of the network device through the circulator 30 , and the reflected signal REV returned by the radio frequency interface of the network device can be unidirectionally transmitted through the circulator 30 . to the transmit channel TX.

In some optional embodiments, in order to further improve the signal quality of the standing wave detection signal and the reflected signal REV, as shown in FIG. 3 , the network device further includes a plurality of transmitting devices 21 and a plurality of receiving devices 22, each of which The transmitting channel TX is connected to the circulator 30 through the transmitting device 21 , and each receiving channel RX is connected to the circulator 30 through the receiving device 22 , so as to be stabilized by the transmitting device 21 and the receiving device 22 Signal quality of transmit channel TX and receive channel RX. The embodiments of the present disclosure do not specifically limit the types of the transmitting device 21 and the receiving device 22. For example, as shown in FIG. 4, the transmitting device 21 may be a power amplifier (PA, Power Amplifier), and the receiving device 22 may be a low noise Amplifier (LNA) or Switching Low Noise Amplifier (DSLNA).

The embodiments of the present disclosure do not specifically limit other circuit structures of the network device. For example, in some optional embodiments, as shown in FIG. 3 and FIG. 4 , in order to realize a multiplexed antenna calibration network (AC network), the network device further includes a second selection switch 12 and a third selection switch 13, The transmission channel TX is selectively connected to the circulator 30 or the third selection switch 13 through the second selection switch 12 , and the antenna calibration network is selectively connected to the transmission through the third selection switch 13 . The channel TX or the receiving channel RX is connected, so that the antenna calibration network can respectively complete the task of antenna calibration and the task of network equipment standing wave detection in different time periods through the switch.

The network device provided by the present disclosure replaces the solution of using the detection channel ORX to realize standing wave detection in the related art by multiplexing the receiving channel RX and the antenna calibration network, and omits the detection channel ORX, the signal acquisition device, and the switch device in the network device. and other corresponding circuit structures, thereby simplifying the equipment structure of the network equipment, improving the utilization rate of the network equipment space, and reducing the wiring area and cost of the network equipment.

It should be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the present disclosure.

Claims

A standing wave detection method for network equipment, comprising:

Detect the power level of the reflected signal;

detecting the power level of the forward signal; and

According to the detected power level of the reflected signal and the power level of the forward signal, the standing wave ratio corresponding to the multiple transmission channels of the network device is obtained, wherein,

The step of detecting the power level of the reflected signal includes: sending a standing wave detection signal through the multiple transmit channels of the network device; and acquiring the power of the reflected signal through multiple receive channels of the network device level;

The step of detecting the power level of the forward signal includes: controlling the plurality of transmitting channels of the network device to send out standing wave detection signals; and controlling one of the receiving channels to obtain the forward signal through an antenna calibration network power level.
The standing wave detection method according to claim 1, wherein,

The step of detecting the power level of the reflected signal further includes, before sending the standing wave detection signal:

controlling the plurality of receiving channels to conduct with the corresponding radio frequency interface of the network device through the circulator;

The step of detecting the power level of the forward signal further includes, before sending the standing wave detection signal:

The one receiving channel is controlled to be connected to the antenna calibration network.
The standing wave detection method according to claim 1 or 2, wherein the step of obtaining the standing wave ratios corresponding to multiple transmission channels of the network device comprises:

The forward detection power linear value is obtained by the power of the forward signal, and the reverse detection power linear value is obtained by the power of the reflected signal;

obtaining a reflection coefficient according to the linear value of the forward detection power and the linear value of the reverse detection power;

obtaining the standing wave ratio of the network device according to the reflection coefficient;

The power of the forward signal is obtained from the gain of the receiving channel of the antenna calibration network and the detected power level of the forward signal, and the power of the reflected signal is obtained from the gain of each receiving channel and the detected power level. The power level of the reflected signal is obtained.
The standing wave detection method according to claim 3, wherein the power of the forward signal is obtained by the calculation formula P f =P acrx (i)-G acrx , wherein P acrx (i) is the detected forward signal The power level of , G acrx is the receiving channel gain of the antenna calibration network, i represents the channel number;

The power of the reflected signal is obtained by the calculation formula P r =P rx '(i)-G rx (i), where P rx '(i) is the detected power level of the reflected signal, and G rx (i) is the gain of the receive channel.
The standing wave detection method according to claim 4, wherein the standing wave detection method further comprises the step of acquiring the standing wave signal level, comprising:

Controlling a transmission channel of the network device to send out a standing wave calibration signal;

Controlling multiple receiving channels of the network device to obtain standing wave signal levels through the antenna calibration network;

The receiving channel gain G rx (i) of the reflected signal is obtained by the calculation formula G rx (i)=P rx (i)-(P actx +G actx ), where P rx (i) is the standing wave signal level power, P actx is the power of the standing wave detection signal sent by the transmit channel, and G actx is the transmit channel gain of the antenna calibration network.
A standing wave detection device for network equipment, comprising:

a storage medium, in which an executable program is stored;

One or more processors, the one or more processors can call the executable program to implement the standing wave detection method according to any one of claims 1 to 5 .
A network device, comprising an antenna calibration network, a standing wave detection device, a plurality of transmission channels and a plurality of reception channels, wherein the antenna calibration network is connected with a plurality of the reception channels, and the standing wave detection device is in the claim The standing wave detection device described in 6.
The network device of claim 7, wherein the network device further comprises a first selection switch, the first selection switch is connected to the one receiving channel, the receiving channel is selectively selected by the first selection switch connected with the antenna calibration network or the corresponding radio frequency interface of the network device; the network device further includes a plurality of circulators, each of the transmitting channels and each of the receiving channels is connected to the corresponding radio frequency through the corresponding circulator Connect to the corresponding radio frequency interface of the network device.
The network device according to claim 8, wherein the network device further comprises a plurality of transmitting devices and a plurality of receiving devices, each of the transmitting channels is connected to the circulator through the transmitting device, and each of the transmitting devices is connected to the circulator. The receiving channel is connected to the circulator through the receiving device.
The network device according to claim 9, wherein the transmitting device is a power amplifier, and the receiving device is a low noise amplifier.