WO2018171282A1 - Remote terminal of distributed antenna system and uplink signal link detection method and device therefor - Google Patents

Abstract

The present invention relates to a remote terminal of a distributed antenna system and an uplink signal link detection method and device therefor. The remote terminal of the distributed antenna system comprises an uplink radio frequency module, a digital board and a radio frequency switch unit, wherein the digital board comprises an embedded host and a digital processing unit. When the embedded host receives an uplink signal link detection instruction, the radio frequency switch unit is controlled to turn on an input end of the uplink radio frequency module and a transmitting port of the digital board so as to suspend a normal link signal processing function of the digital processing unit in the digital board. The digital processing unit transmits a configured first test signal from the transmitting port of the digital board, and receives a second test signal from a receiving port of the digital board. The embedded host determines whether an uplink signal link is faulty on the basis of the first test signal and the second test signal. With the present invention, an uplink signal link abnormality of a device may be detected in time.

Description

Distributed antenna system remote machine and uplink signal link detection method and device thereof Technical field

The present invention relates to the field of communications technologies, and in particular, to a remote antenna of a distributed antenna system, a method for detecting an uplink signal link of a remote antenna of a distributed antenna system, and an uplink signal link detecting apparatus for a remote antenna of a distributed antenna system.

Background technique

Active DAS (Distributed Antenna System) equipment is mainly used for wireless coverage, especially in the field of indoor wireless cellular access and coverage. Active DAS equipment, as an infrastructure for indoor signal distribution, requires long-term stable and reliable operation. At present, the fault detection and reporting of most devices are mainly focused on the current and voltage detection of the hardware. This method can only detect the main device, and can not find the impact of the abnormal operation of the software on the link, and cannot reflect the entire link. Hardware working status. In order to make up for this deficiency, some devices use the signal gain detection method to judge the operation status of the downlink signal link of the device. However, for the uplink signal link, the signal link and the downlink signal link are reversed, which is often required. Abnormalities can be learned through manual daily testing or customer complaints and complaints, which brings more trouble to the operation and maintenance of the equipment.

Summary of the invention

Based on the above, it is necessary to provide a remote antenna of the distributed antenna system and an uplink signal link detection method and device thereof, which can detect the abnormality of the uplink signal link of the device in time, and provide greater convenience for maintenance and maintenance.

A remote antenna system for distributed antenna system, comprising an uplink RF module, a digital board and a radio frequency switch unit, the digital board comprises an embedded host and a digital processing unit; the RF switch unit is respectively connected with the transmitting port of the digital board and the input end of the uplink RF module Connected, the output of the uplink RF module is connected to the receiving port of the digital board;

When receiving the uplink signal link detection instruction, the embedded host controls the radio frequency switch unit to conduct the input end of the uplink radio frequency module and the transmission port of the digital board, and suspend the normal link signal processing function of the digital processing unit in the digital board. ;

The digital processing unit transmits a configured first test signal from a transmitting port of the digital board, and receives a second test signal from a receiving port of the digital board, wherein the frequency of the first test signal is an uplink of the remote antenna of the distributed antenna system The working band frequency of the signal link;

The embedded host determines, according to the first test signal and the second test signal, whether the uplink signal link is faulty.

A method for detecting an uplink signal link of a remote antenna of a distributed antenna system includes the following steps:

When receiving the uplink signal link detection command, the input terminal of the uplink RF module is turned on to the transmitting port of the digital board by controlling the RF switch unit, and the normal link signal processing function of the digital processing unit in the digital board is suspended; wherein the RF switch The unit is respectively connected to the transmitting port of the digital board and the input end of the uplink RF module, and the output end of the uplink RF module is connected to the receiving port of the digital board;

Obtaining a first test signal transmitted by a transmitting port of the digital board, wherein a frequency of the first test signal is a working band frequency of an uplink signal link of a remote antenna of the distributed antenna system, and the first test signal is a signal transmitted by the digital processing unit;

Obtaining a second test signal that is received by the digital processing unit from a receiving port of the digital board, where the second test signal is a signal that is output by the uplink radio frequency module according to the received first test signal;

Determining whether there is a fault in the uplink signal link according to the first test signal and the second test signal.

A remote antenna uplink signal link detecting device for a distributed antenna system, comprising:

The control module is configured to, when receiving the uplink signal link detection instruction, turn on the input end of the uplink RF module and the transmitting port of the digital board by controlling the RF switch unit, and suspend the normal link signal processing of the digital processing unit in the digital board The function; wherein the RF switch unit is respectively connected to the transmitting port of the digital board and the input end of the uplink RF module, and the output end of the uplink RF module is connected to the receiving port of the digital board;

a first test signal acquiring module, configured to acquire a first test signal transmitted through a transmitting port of the digital board, where a frequency of the first test signal is a working band frequency of an uplink signal link of a remote antenna of the distributed antenna system And the first test signal is a signal transmitted by the digital processing unit;

a second test signal acquiring module, configured to acquire a second test signal received by the digital processing unit from a receiving port of the digital board, where the second test signal is the first test signal received by the uplink radio frequency module Output signal

The fault detection module is configured to determine, according to the first test signal and the second test signal, whether the uplink signal link is faulty.

The remote antenna of the distributed antenna system and the method and device for detecting the uplink signal link thereof, according to the characteristics of the active digital DAS remote device, adding a radio frequency switch unit to the DAS remote machine, when uplink signal link detection is required The embedded host controls the RF switch unit to connect the uplink RF module to the transmit port of the digital board, and the digital processing unit transmits the configured test signal from the transmit port of the digital board, and the test signal is input to the digital board through the uplink RF module. The receiving port, according to the digital board output and input test signals, can find the uplink signal link abnormality of the device in time, providing greater convenience for maintenance and overhaul. In addition, the present invention only needs to add a new RF switch unit, and the corresponding software design can detect the uplink signal link of the device at any time, so that the diagnostic capability of the device is more convenient and effective, the hardware modification is small, and the deployment is convenient; the digital board Directly output a stable and effective reference signal without the need of an external reference signal. The link test function can be run at any time according to the requirements of the device control terminal, saving the investment of personnel and resources for the engineering uplink signal link test.

DRAWINGS

1 is a schematic structural view of a DAS remote machine in a conventional technology;

2 is a schematic structural diagram of a DAS remote unit according to an embodiment of the present invention;

3 is a schematic structural diagram of a DAS remote unit according to another embodiment of the present invention;

4 is a schematic structural diagram of a DAS remote unit according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a method for detecting an uplink signal link of a remote antenna of a distributed antenna system according to an embodiment of the present invention; FIG.

6 is a schematic diagram of connection of a switch switching unit in a test mode according to an embodiment of the present invention;

7 is a schematic diagram of connection of a switch switching unit in a normal working mode according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an apparatus for detecting an uplink signal link of a remote antenna of a distributed antenna system according to an embodiment of the present invention.

detailed description

In order to better understand the present invention, the structure and working principle of the DAS remote machine in the prior art are briefly introduced.

As shown in FIG. 1, the DAS remote unit includes a digital board, a downlink radio module, an uplink radio module, and a duplexer, and the digital board includes an embedded host and a digital processing unit. When the DAS remote machine is in normal working state, the downlink signal of the DAS remote machine reaches the downlink RF module from the TX port (transmit port) of the digital board, and then enters the duplexer; the uplink signal of the DAS remote machine Enter the upstream RF module through the duplexer and enter the RX port (receive port) of the digital board.

When performing downlink signal link detection, the operation status of the downlink signal link of the device is generally determined by the power source of the digital board and the power detection of the downlink signal link output of the device. However, for the uplink signal link, the signal link and the downlink signal link are reversed, and since the coverage area does not have a stable and effective reference source, it is difficult to detect. The invention provides a scheme for detecting an uplink signal link of a DAS remote machine at any time according to the characteristics of the active digital DAS remote unit, thereby making the diagnostic capability of the device more convenient and effective, thereby discovering the device link in time. Abnormal, providing greater convenience for maintenance and overhaul.

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and preferred embodiments.

As shown in FIG. 2, a distributed antenna system remote unit includes an uplink radio frequency module, a digital board, and a radio frequency switch unit, the digital board includes an embedded host and a digital processing unit; and the radio frequency switch unit and the digital board transmit port respectively. The input ends of the uplink RF module are connected, and the output end of the uplink RF module is connected to the receiving port of the digital board;

When receiving the uplink signal link detection instruction, the embedded host controls the radio frequency switch unit to conduct the input end of the uplink radio frequency module and the transmission port of the digital board, and suspend the normal link signal processing function of the digital processing unit in the digital board. ;

The digital processing unit transmits a configured first test signal from a transmitting port of the digital board, and receives a second test signal from a receiving port of the digital board, wherein the frequency of the first test signal is an uplink of the remote antenna of the distributed antenna system The working band frequency of the signal link;

The embedded host determines, according to the first test signal and the second test signal, whether the uplink signal link is faulty.

The remote antenna of the distributed antenna system realizes the detection of the uplink signal link of the DAS remote machine by adding a radio frequency switch unit in the DAS remote machine and corresponding software design.

The hardware structure of the improved DAS remote unit of the present invention will be briefly described below.

The RF switch unit is set in the DAS remote unit, and the RF switch unit is a unit including each RF switch. The RF switch unit is respectively connected to the transmitting port of the digital board and the input end of the uplink RF module, and can test the uplink signal link. In addition, in order to not affect the normal use of the DAS remote machine, in one embodiment, as shown in FIG. 3, the distributed antenna system remote unit further includes a downlink radio frequency module and a duplexer; and an input terminal of the downlink radio frequency module. Connected to the RF switch unit, the output of the downlink RF module is connected to the input of the duplexer, and the output of the duplexer is connected to the RF switch unit. The embedded host can control the DAS remote device by controlling the RF switch unit. .

The number and type of RF switches included in the RF switch unit can be determined according to actual needs. For example, in one embodiment, as shown in FIG. 4, the radio frequency switch unit includes a first radio frequency switch S1 and a second radio frequency switch S2; the mobile end 1 of the first radio frequency switch S1 is connected to the transmit port TX of the digital board. The first fixed end 2 of the first RF switch S1 is connected to the input end of the downlink RF module, and the second fixed end 3 of the first RF switch S1 is connected to the first fixed end 2 of the second RF switch S2. The movable end 1 of the RF switch S2 is connected to the input end of the upstream RF module, and the second fixed end 3 of the second RF switch S2 is connected to the output end of the duplexer.

In combination with the structure of the above-mentioned DAS remote unit, the present invention also carries out software improvements, and the functions of the respective devices are described in detail below.

When the DAS remote machine enters the test mode, that is, when the embedded host receives the uplink signal link detection command, it controls the RF switch unit to turn on the input end of the uplink RF module and the transmit port of the digital board. In addition, in an embodiment, when the embedded host receives the normal working instruction of the remote antenna of the distributed antenna system, the transmitting terminal of the digital board is connected to the input end of the downlink RF module by controlling the RF switching unit, and the uplink RF is turned on. The input of the module is electrically connected to the output of the duplexer.

Since the digital processing unit is required to transmit the test signal, the embedded host needs to suspend the normal link signal processing function of the digital processing unit, wherein the normal link signal processing function of the suspended digital processing unit can be implemented according to the manner existing in the prior art. In addition, since the present invention implements the detection of the uplink signal link, the embedded host needs to configure the frequency of the test signal transmitted by the digital processing unit signal. The frequency of the configured test signal may be set as long as it satisfies the frequency within the working band of the uplink signal link, and the specific value may be set according to actual needs.

Since the power detection method is used to implement the detection of the uplink signal link, the embedded host needs to configure the power of the test signal, and the power of the test signal is not strictly limited, and can be set according to actual needs. After the test signal is configured, the digital processing unit transmits the test signal from the TX port of the digital board and receives the test signal from the RX port of the digital board.

In one embodiment, the embedded host compares the difference between the power of the second test signal and the power of the first test signal with a preset uplink gain; the difference between the difference and the uplink gain is preset. When the tolerance is within the range, it is determined that the uplink signal link is normal, and when the difference between the difference and the uplink gain is not within the preset tolerance range, the uplink signal link is determined to be abnormal.

The invention also provides a method for detecting an uplink signal link of a remote antenna of a distributed antenna system, and the method of the invention is described in detail below with reference to the accompanying drawings.

As shown in FIG. 5, a method for detecting an uplink signal link of a remote antenna of a distributed antenna system includes the following steps:

S110. When receiving the uplink signal link detection instruction, control the radio frequency switch unit to turn on the input end of the uplink radio frequency module and the transmission port of the digital board, and suspend the normal link signal processing function of the digital processing unit in the digital board; The RF switch unit is respectively connected to the transmitting port of the digital board and the input end of the uplink RF module, and the output end of the uplink RF module is connected to the receiving port of the digital board;

S120. Acquire a first test signal transmitted by a transmitting port of the digital board, where a frequency of the first test signal is a working band frequency of an uplink signal link of a remote antenna of the distributed antenna system, and the first test is performed. The signal is a signal transmitted by the digital processing unit;

S130. Acquire a second test signal that is received by the digital processing unit from a receiving port of the digital board, where the second test signal is a signal that is output by the uplink radio frequency module according to the received first test signal.

S140. Determine, according to the first test signal and the second test signal, whether the uplink signal link is faulty.

The method for detecting the uplink signal link fault of the remote antenna of the above distributed antenna system can be implemented by a corresponding program, and the program can be run in the embedded host of the digital board. By adding a radio frequency switch unit to the DAS remote unit and matching the corresponding software design, the method realizes the detection of the uplink signal link of the DAS remote unit at any time.

The hardware structure of the improved DAS remote unit of the present invention will be briefly described below.

The RF switch unit is set in the DAS remote unit, and the RF switch unit is a unit including each RF switch. The RF switch unit is respectively connected to a transmitting port of the digital board and an input end of the uplink RF module. A control line is connected between the RF switch unit and the digital board, and the embedded host of the digital board can control the conduction state of the RF switch unit to implement uplink signal link fault detection.

In addition, in order to not affect the normal use of the DAS remote device, as shown in FIG. 3, the remote antenna of the distributed antenna system further includes a downlink RF module and a duplexer; the input end of the downlink RF module is connected to the RF switch unit. The output end of the downlink RF module is connected to the input end of the duplexer, and the output end of the duplexer is connected to the RF switch unit. The embedded host can make the DAS remote machine work normally by controlling the RF switch unit.

The number and type of RF switches included in the RF switch unit can be determined according to actual needs. For example, the RF switch unit includes two 1*2 RF switches, and the 1*2 RF switch has one moving end and two fixed ends. If only the detection function of the uplink signal link is implemented, the RF switch unit may also include only one RF switch. The RF switch unit may include a plurality of RF switches, such as three, etc., regardless of cost factors. The RF switch is not limited to the 1*2 RF switch, but can also be the RF switch of more ports.

In one embodiment, as shown in FIG. 4, the radio frequency switch unit includes a first radio frequency switch S1 and a second radio frequency switch S2; the mobile end 1 of the first radio frequency switch S1 is connected to the transmit port TX of the digital board, first The first fixed end 2 of the RF switch S1 is connected to the input end of the downlink RF module, and the second fixed end 3 of the first RF switch S1 is connected to the first fixed end 2 of the second RF switch S2, and the second RF switch is connected. The moving end 1 of the S2 is connected to the input end of the upstream radio frequency module, and the second fixed end 3 of the second RF switch S2 is connected to the output end of the duplexer.

In combination with the structure of the above DAS remote unit, the present invention also carries out software improvements, and the various steps are described in detail below.

In step S110, the DAS remote unit can be set to two working modes, one is a normal working mode and the other is a test mode. The normal working mode means that the switch conduction relationship of the switch switching unit maintains the regular connection relationship between the digital board, the downlink radio frequency module and the uplink receiving module, so that the signal direction of the device is the same as that of the traditional digital DAS. The test mode means that the switch conduction relationship of the switch switching unit maintains the loop connection mode between the uplink RF module and the digital board, and realizes detection of the uplink signal link. Through the setting of two working modes, the user can run the uplink signal link test function and the normal working function of the DAS remote machine at any time according to the requirements of the device control terminal.

When the DAS remote machine enters the test mode, that is, when receiving the uplink signal link detection command, the embedded host controls the RF switch unit to turn on the input end of the uplink RF module and the transmit port of the digital board. As shown in FIG. 6, the embedded host in the digital board controls the RF switch unit, and the switch S1 is set to 1, 3, and the switch S2 is set to 1, 2, then the input of the uplink RF module and the digital board. The transmitting port is turned on, and the output of the uplink RF module is turned on with the receiving port of the digital board.

In an embodiment, the method for detecting the uplink signal of the remote antenna of the distributed antenna system may further include the step of: when receiving the normal working instruction of the remote antenna of the distributed antenna system, controlling the transmitting port of the digital board by controlling the RF switching unit The input end of the uplink RF module is turned on, and the input end of the uplink RF module is connected to the output end of the duplexer. The digital board, the downlink RF module, and the uplink RF module are in a normal connection state, and the DAS remote unit works normally.

As shown in Figure 7, when the device is in the normal operating mode, the conduction state of the switch is: S1 is 1 and 2 is on, S2 is 1 and 3 is on, and the downlink signal of the DAS remote device is from the digital board. After reaching the downlink RF module, and then entering the duplexer, the uplink signal enters the uplink RF module through the duplexer and then enters the digital board, which is the same as the conventional digital DAS.

Since the digital processing unit is required to transmit the test signal, the embedded host of the digital board needs to suspend the normal link signal processing function of the digital processing unit, wherein the normal link signal processing function of the pause digital processing unit can be based on the existing ones in the prior art. Way to achieve.

In step S120 and step S130, since the invention implements the detection of the uplink signal link, the embedded host needs to configure the frequency of the test signal transmitted by the digital processing unit. The frequency of the configured test signal may be set as long as it satisfies the frequency within the working band of the uplink signal link, and the specific value may be set according to actual needs. For example, if the working band of the uplink signal link of the device is 1920 MHz (MHz)-1980 MHz, the frequency of the test signal can be set to any value within 1920 MHz-1980 MHz, such as 1950 MHz.

Since the power detection method is used to implement the detection of the uplink signal link, the power of the test signal needs to be configured, and the power of the test signal is not strictly limited, and can be set according to actual needs. The first test signal acquired by the embedded host is the test signal configured for it.

After the embedded host configures the test signal, the digital processing unit transmits a test signal configured by the embedded host from the TX port, and the test signal enters the RX port of the digital board through the uplink RF module, and the digital processing unit of the digital board acquires the digital board RX port receiving. The test signal, the embedded host obtains the received test signal from the digital processing unit.

In step S140, the embedded host determines whether the uplink signal link is faulty according to the test signal output by the digital board and the received test signal. In an embodiment, the step of determining whether the uplink signal link is faulty according to the first test signal and the second test signal may include: comparing a difference between a power of the second test signal and a power of the first test signal with a preset The uplink gain is compared; if the difference between the difference and the uplink gain is within a preset tolerance range, it is determined that the uplink signal link is normal, otherwise the uplink signal link is determined to be abnormal.

For example, the power of the test signal output by the digital board is P0, and the frequency is F0, where F0 is the working band frequency of the uplink of the device, and the power of the test signal received by the digital board RX port of the digital processing unit is P1. The embedded host compares the value of P1-P0 with the pre-stored uplink gain value G1. If the difference is within the tolerance range (for example, within 2 dB), the device uplink signal link is considered normal, and the normal result is returned, otherwise it returns. The result of the upstream abnormality.

Based on the same inventive concept, the present invention further provides a remote antenna uplink signal link detecting apparatus for a distributed antenna system, and a specific implementation manner of the apparatus of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 8, a remote antenna uplink signal link detecting apparatus for a distributed antenna system includes:

The control module 110 is configured to: when the uplink signal link detection instruction is received, control the radio frequency switch unit to turn on the input end of the uplink radio frequency module and the transmit port of the digital board, and suspend the normal link signal of the digital processing unit in the digital board. Processing function; wherein the RF switch unit is respectively connected to the transmitting port of the digital board and the input end of the uplink RF module, and the output end of the uplink RF module is connected to the receiving port of the digital board;

a first test signal acquisition module 120, configured to acquire a first test signal transmitted through a transmit port of the digital board, where the frequency of the first test signal is within a working band of an uplink signal link of the remote antenna of the distributed antenna system Frequency, and the first test signal is a signal transmitted by the digital processing unit;

a second test signal acquisition module 130, configured to acquire a second test signal received by the digital processing unit from a receiving port of the digital board, where the second test signal is the first test received by the uplink radio frequency module Signal output signal;

The fault detection module 140 is configured to determine, according to the first test signal and the second test signal, whether the uplink signal link is faulty.

The above-mentioned distributed antenna system remote machine uplink signal link failure detecting device can be operated in the embedded host of the digital board. By adding a radio frequency switch unit to the DAS remote unit and matching the corresponding software design, the device realizes the detection of the uplink signal link of the DAS remote unit at any time.

The hardware structure of the improved DAS remote unit of the present invention will be briefly described below.

The RF switch unit is set in the DAS remote unit, and the RF switch unit is a unit including each RF switch. The RF switch unit is respectively connected to a transmitting port of the digital board and an input end of the uplink RF module. A control line is connected between the RF switch unit and the digital board, and the embedded host of the digital board can control the conduction state of the RF switch unit to implement uplink signal link fault detection.

In addition, in order to not affect the normal use of the DAS remote device, as shown in FIG. 3, the remote antenna of the distributed antenna system further includes a downlink RF module and a duplexer; the input end of the downlink RF module is connected to the RF switch unit. The output end of the downlink RF module is connected to the input end of the duplexer, and the output end of the duplexer is connected to the RF switch unit. The embedded host of the digital board can make the DAS remote machine work normally by controlling the RF switch unit.

The number and type of RF switches included in the RF switch unit can be determined according to actual needs. For example, in one embodiment, as shown in FIG. 4, the radio frequency switch unit includes a first radio frequency switch S1 and a second radio frequency switch S2; the mobile end 1 of the first radio frequency switch S1 is connected to the transmit port TX of the digital board. The first fixed end 2 of the first RF switch S1 is connected to the input end of the downlink RF module, and the second fixed end 3 of the first RF switch S1 is connected to the first fixed end 2 of the second RF switch S2. The movable end 1 of the RF switch S2 is connected to the input end of the upstream RF module, and the second fixed end 3 of the second RF switch S2 is connected to the output end of the duplexer.

In combination with the structure of the above DAS remote unit, the present invention also carries out software improvements, and the functions of each module are described in detail below.

When the DAS remote device enters the test mode, that is, when the control module 110 receives the uplink signal link detection command, the control module 110 controls the radio frequency switch unit to turn on the input end of the uplink radio frequency module and the transmission port of the digital board. In addition, in an embodiment, when receiving the normal working instruction of the remote antenna of the distributed antenna system, the control module 110 controls the radio frequency switch unit to turn on the transmitting port of the digital board and the input end of the downlink radio module, and uplink the radio frequency. The input of the module is electrically connected to the output of the duplexer.

Since the digital processing unit is required to transmit the test signal, the control module 110 needs to suspend the normal link signal processing function of the digital processing unit, wherein the normal link signal processing function of the suspended digital processing unit can be implemented in accordance with the manner already in the prior art.

Since the present invention implements detection of an uplink signal link, the embedded host needs to configure the frequency of the test signal transmitted by the digital processing unit signal. The frequency of the configured test signal may be set as long as it satisfies the frequency within the working band of the uplink signal link, and the specific value may be set according to actual needs.

Since the power detection method is used to implement the detection of the uplink signal link, the embedded host needs to configure the power of the test signal, and the power of the test signal is not strictly limited, and can be set according to actual needs. The first test signal acquired by the first test signal acquisition module 120 is a test signal configured by the embedded host.

After the test signal is configured, the digital processing unit transmits the test signal from the TX port of the digital board, receives the test signal from the RX port of the digital board, and the second test signal acquisition module 130 acquires the test signal from the digital processing unit.

In one embodiment, the fault detection module 140 compares the difference between the power of the second test signal and the power of the first test signal with a preset uplink gain; the difference between the difference and the uplink gain is at a preset capacity. When the difference is within the range, it is determined that the uplink signal link is normal, and when the difference between the difference and the uplink gain is not within the preset tolerance range, the uplink signal link is determined to be abnormal.

In order to better understand the present invention, a detailed description will be given below in conjunction with several specific embodiments.

Assume that the frequency band of the digital DAS remote unit is 2110MHz-2170MHz downstream and 1920MHz-1980MHz upstream.

When the device is in the normal working mode, as shown in FIG. 6, the on state of the switch is: S1 is 1 and 2 is on, and S2 is 1 and 3 is on. The downlink signal of the device 2110MHz-2170MHz reaches the downlink RF module from the digital board, and then enters the duplexer. The uplink 1920MHz-1980MHz signal enters the uplink RF module through the duplexer, and then enters the digital board, which is shown in FIG. The conventional digital DAS remote unit has the same principle.

When the uplink signal link detection is to be performed, the device enters the test mode, and the steps and results are as follows:

1. The embedded host of the digital board controls the RF switch unit, and the switch S1 is set to 1, 3, and the switch S2 is set to 1, 2, as shown in FIG.

2. The embedded host of the digital board suspends the normal link signal processing function of the digital processing unit. The embedded host of the digital board configures the frequency and power of the test signal transmitted by the digital processing unit. For example, the test signal power is P0=-50dBm (decibel milliwatt), the frequency is 1950MHz, and the digital processing unit transmits from the TX port of the digital board. The configured test signal.

3. The power of the test signal received by the RX port of the digital processing unit of the digital board is recorded as P1=5dBm.

4. The embedded host of the digital board calculates the value of P1-P0 as 55dB, which is compared with the system's pre-stored uplink gain value of 55dB. The difference is within the tolerance range. It is considered that the uplink signal link of the device is normal and returns to the normal result.

Similarly, if the uplink signal link of the device is abnormal for some reason, the steps and results of the test mode are as follows:

1. The embedded host of the digital board controls the RF switch unit, and the switch S1 is set to 1, 3, and the switch S2 is set to 1, 2, as shown in FIG.

2. The embedded host of the digital board suspends the normal link signal processing function of the digital processing unit. The embedded host of the digital board configures the frequency and power of the test signal transmitted by the digital processing unit. For example, the test signal power is P0=-50dBm (decibel milliwatt), the frequency is 1950MHz, and the digital processing unit transmits from the TX port of the digital board. The configured test signal.

3. The digital processing unit of the digital board counts the power of the test signal received by the RX port of the digital board, and records it as P1=-23dBm.

4. The embedded host of the digital board calculates the value of P1-P0 as 27dB, which is compared with the pre-stored uplink gain value of 55dB, which is far lower than the pre-stored value. It is considered that the uplink signal link of the device is abnormal and returns the abnormal result of the uplink.

Compared with the prior art, the remote antenna of the distributed antenna system and the uplink signal link detection method and device thereof have the following advantages:

1. Using the existing digital DAS function module, only one independent RF switch unit can be added. With the design of the software solution, the test function of the uplink signal link can be realized. The scheme is novel, the hardware changes are small, and the deployment is convenient. .

2. It is not necessary to use the external reference signal, and the link test function can be run at any time according to the requirements of the device control terminal, saving the investment of personnel and resources for the engineering uplink signal link test.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims (10)

A distributed antenna system remote machine, comprising: an uplink radio frequency module, a digital board and a radio frequency switch unit, the digital board comprises an embedded host and a digital processing unit; the radio frequency switch unit and the digital board transmit port and the uplink radio frequency respectively The input ends of the module are connected, and the output end of the uplink RF module is connected to the receiving port of the digital board; When receiving the uplink signal link detection instruction, the embedded host controls the radio frequency switch unit to conduct the input end of the uplink radio frequency module and the transmission port of the digital board, and suspend the normal link signal processing function of the digital processing unit in the digital board. ; The digital processing unit transmits a configured first test signal from a transmitting port of the digital board, and receives a second test signal from a receiving port of the digital board, wherein the frequency of the first test signal is an uplink of the remote antenna of the distributed antenna system The working band frequency of the signal link; The embedded host determines, according to the first test signal and the second test signal, whether the uplink signal link is faulty. The remote antenna of the distributed antenna system according to claim 1, wherein the remote antenna of the distributed antenna system further comprises a downlink RF module and a duplexer; and the input end of the downlink RF module is connected to the RF switch unit. The output end of the downlink RF module is connected to the input end of the duplexer, and the output end of the duplexer is connected to the RF switch unit; When receiving the normal working instruction of the remote antenna of the distributed antenna system, the embedded host controls the RF switch unit to turn on the transmitting port of the digital board and the input end of the downlink RF module, and inputs the input terminal of the uplink RF module with the dual The output of the tool is turned on. The remote antenna of the distributed antenna system according to claim 1, wherein the embedded host compares a difference between a power of the second test signal and a power of the first test signal with a preset uplink gain; When the difference between the difference and the uplink gain is within a preset tolerance range, it is determined that the uplink signal link is normal, and when the difference between the difference and the uplink gain is not within a preset tolerance range, the uplink signal link is determined. abnormal. The remote antenna of the distributed antenna system according to any one of claims 1 to 3, wherein the radio frequency switch unit comprises a first radio frequency switch and a second radio frequency switch; and the dynamic end of the first radio frequency switch and the digital board The first fixed port of the first RF switch is connected to the input end of the downlink RF module, and the second fixed end of the first RF switch is connected to the first fixed end of the second RF switch, and the second RF The movable end of the switch is connected to the input end of the uplink RF module, and the second fixed end of the second RF switch is connected to the output end of the duplexer. A method for detecting an uplink signal link of a remote antenna of a distributed antenna system, comprising: When receiving the uplink signal link detection command, the input terminal of the uplink RF module is turned on to the transmitting port of the digital board by controlling the RF switch unit, and the normal link signal processing function of the digital processing unit in the digital board is suspended; wherein the RF switch The unit is respectively connected to the transmitting port of the digital board and the input end of the uplink RF module, and the output end of the uplink RF module is connected to the receiving port of the digital board; Obtaining a first test signal transmitted by a transmitting port of the digital board, wherein a frequency of the first test signal is a working band frequency of an uplink signal link of a remote antenna of the distributed antenna system, and the first test signal is a signal transmitted by the digital processing unit; Obtaining a second test signal that is received by the digital processing unit from a receiving port of the digital board, where the second test signal is a signal that is output by the uplink radio frequency module according to the received first test signal; Determining whether there is a fault in the uplink signal link according to the first test signal and the second test signal. The method for detecting an uplink signal link of a remote antenna of a distributed antenna system according to claim 5, further comprising the steps of: When receiving the normal working command of the remote antenna of the distributed antenna system, the transmitting port of the digital board is connected to the input end of the downlink RF module by controlling the RF switching unit, and the input end of the uplink RF module and the output end of the duplexer are connected. Turning on, wherein the input end of the downlink RF module is connected to the RF switch unit, the output end of the downlink RF module is connected to the input end of the duplexer, and the output end of the duplexer is connected to the RF switch unit. The method for detecting an uplink signal link of a remote antenna of a distributed antenna system according to claim 5, wherein the step of determining whether the uplink signal link is faulty according to the first test signal and the second test signal comprises: Comparing the difference between the power of the second test signal and the power of the first test signal with a preset uplink gain; If the difference between the difference and the uplink gain is within a preset tolerance range, it is determined that the uplink signal link is normal, otherwise the uplink signal link is determined to be abnormal. The method for detecting an uplink signal link of a remote antenna of a distributed antenna system according to any one of claims 5 to 7, wherein the RF switch unit comprises a first RF switch and a second RF switch; and the first RF switch The mobile terminal is connected to the transmitting port of the digital board, and the first fixed end of the first RF switch is connected to the input end of the downlink RF module, and the second fixed end of the first RF switch and the first fixed end of the second RF switch are not moved. The terminal is connected, the moving end of the second RF switch is connected to the input end of the uplink RF module, and the second fixed end of the second RF switch is connected to the output end of the duplexer. A device for detecting an uplink signal link of a remote antenna of a distributed antenna system, comprising: The control module is configured to, when receiving the uplink signal link detection instruction, turn on the input end of the uplink RF module and the transmitting port of the digital board by controlling the RF switch unit, and suspend the normal link signal processing of the digital processing unit in the digital board The function; wherein the RF switch unit is respectively connected to the transmitting port of the digital board and the input end of the uplink RF module, and the output end of the uplink RF module is connected to the receiving port of the digital board; a first test signal acquiring module, configured to acquire a first test signal transmitted through a transmitting port of the digital board, where a frequency of the first test signal is a working band frequency of an uplink signal link of a remote antenna of the distributed antenna system And the first test signal is a signal transmitted by the digital processing unit; a second test signal acquiring module, configured to acquire a second test signal received by the digital processing unit from a receiving port of the digital board, where the second test signal is the first test signal received by the uplink radio frequency module Output signal The fault detection module is configured to determine, according to the first test signal and the second test signal, whether the uplink signal link is faulty. The remote antenna uplink signal link detecting device of the distributed antenna system according to claim 9, wherein the radio frequency switch unit comprises a first radio frequency switch and a second radio frequency switch; and the mobile terminal and the digital end of the first radio frequency switch The transmitting port of the board is connected, the first fixed end of the first RF switch is connected to the input end of the downlink RF module, and the second fixed end of the first RF switch is connected to the first fixed end of the second RF switch, and the second The movable end of the RF switch is connected to the input end of the uplink RF module, and the second fixed end of the second RF switch is connected to the output end of the duplexer.

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