CN109348493B - High-reliability wireless communication system link backup device and control method thereof - Google Patents
High-reliability wireless communication system link backup device and control method thereof Download PDFInfo
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- CN109348493B CN109348493B CN201811281550.XA CN201811281550A CN109348493B CN 109348493 B CN109348493 B CN 109348493B CN 201811281550 A CN201811281550 A CN 201811281550A CN 109348493 B CN109348493 B CN 109348493B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
Abstract
The invention relates to the field of radio frequency front end and radio frequency technical design in a mobile communication system, in particular to a high-reliability wireless communication system link backup device; the invention comprises a digital board for sending and processing baseband signals, a radio frequency power amplifier module for receiving the baseband signals, amplifying and converting the baseband signals into communication signals and transmitting the communication signals, and an antenna feeder module for receiving the communication signals, converting and sending wireless communication signals; the digital board is provided with an MCU, an FPGA and a digital processing unit which are connected in sequence and used for transmitting baseband signals; in the invention, the digital board sends and processes baseband signals, the radio frequency power amplifier module receives the baseband signals and transmits communication signals, the antenna feeder module receives the communication signals and converts and sends wireless communication signals, and when the baseband signals in the device are found to be transmitted or received to be in fault, the digital board can automatically switch backup circuits to ensure that the communication work continues to work normally.
Description
Technical Field
The invention relates to the field of radio frequency front end and radio frequency technical design in a mobile communication system, in particular to a high-reliability wireless communication system link backup device.
Background
A Wireless Communication System (Wireless Communication System) refers to a manner of realizing Communication by a Wireless protocol; the wireless communication system is also called as a radio communication system, and consists of three major parts, namely a sending device, a receiving device and a wireless channel, and the system realizes information and data transmission by utilizing radio magnetic waves; it is classified according to the operating frequency band or transmission means, and can be classified into medium wave communication, short wave communication, ultra short wave communication, microwave communication, satellite communication, and the like.
In a wireless communication system, the reliability requirement on a base station and a wireless network coverage system is very high, and especially in special site positions such as remote sites, severe environments or busy areas, the long-term reliability of the system is strictly required; at present, in some remote, severe or busy areas, the reliability of the wireless communication system is not strong enough, and needs to be improved.
Disclosure of Invention
In order to overcome the above-mentioned disadvantages, the present invention provides a high-reliability link backup device for a wireless communication system, which can automatically switch a backup path when a baseband signal transmitting or receiving in a discovery device fails, thereby ensuring that the communication operation continues to work normally.
The technical scheme for solving the technical problem is as follows:
a high-reliability wireless communication system link backup device comprises a digital board for sending and processing baseband signals, a radio frequency power amplifier module for receiving the baseband signals, amplifying and converting the baseband signals into communication signals and transmitting the communication signals, and an antenna feeder module for receiving the communication signals, converting and sending the wireless communication signals; the digital board is provided with an MCU, an FPGA and a digital processing unit which are connected in sequence and used for sending baseband signals, the digital processing unit is internally provided with at least two baseband signal transmitting channels, and each baseband signal transmitting channel can be in signal butt joint with at least two communication channels. As an improvement of the present invention, a first baseband signal transmitting channel and a second baseband signal transmitting channel are disposed in the digital processing unit, and a frequency conversion and signal detection unit for detecting a baseband signal is disposed in each of the first baseband signal transmitting channel and the second baseband signal transmitting channel.
As a further improvement of the present invention, a first communication channel for receiving a baseband signal transmitted by the first baseband signal transmission channel, a second communication channel for receiving a baseband signal transmitted by the second baseband signal transmission channel, and a power supply unit for supplying power to the first communication channel and the second communication channel are disposed in the radio frequency power amplifier module.
As a further improvement of the present invention, a first communication radio frequency circuit is disposed in the first communication channel, and the first communication radio frequency circuit includes a first radio frequency switch (K1), a resistor group (R1), a resistor group (R2), a first combiner, a first PA processing unit (PA1), a first coupler, and a relay switch (K3); one end of a first radio frequency switch (K1) is connected with the first baseband signal transmitting channel, the other end of the first radio frequency switch (K1) is respectively connected with one end of a resistor group (R1) and one end of the resistor group (R3), one end of a first combiner is respectively connected with the other end of the resistor group (R1) and one end of the resistor group (R2), the other end of the first combiner is connected with a first PA processing unit (PA1), the first PA processing unit (PA1) is connected with a first coupler, and the first coupler is connected with a relay switch (K3).
As a further improvement of the present invention, a second communication rf circuit is disposed in the second communication channel, and the second communication rf circuit includes a second rf switch (K2), a resistor group (R3), a resistor group (R4), a second combiner, a second PA processing unit (PA2), and a second coupler; one end of a second radio frequency switch (K2) is connected with the second baseband signal transmitting channel, the other end of the second radio frequency switch (K2) is respectively connected with one end of a resistor group (R4) and the other end of a resistor (R2), one end of a second combiner is respectively connected with the other end of the resistor group (R3) and the other end of the resistor group (R4), the other end of the second combiner is connected with a second PA processing unit (PA2), the second PA processing unit (PA2) is connected with a second coupler, and the second coupler is connected with a relay switch (K3).
As a further improvement of the present invention, a first I/O interface and a first detection unit are further disposed in the first communication channel, one end of the first I/O interface is connected to the MCU, the other end of the first I/O interface is connected to the first detection unit, and the first detection unit is connected to the first PA processing unit (PA 1).
As a further improvement of the present invention, a second I/O interface and a second detection unit are further disposed in the second communication channel, one end of the second I/O interface is connected to the MCU, the other end of the second I/O interface is connected to the second detection unit, and the second detection unit is connected to a second PA processing unit (PA 2).
As a further improvement of the present invention, the power supply unit includes a power line, and a diode (D1), a diode (D2) connected to the power line; a diode (D1) is connected to the first communication channel and a diode (D2) is connected to the second communication channel.
As a further improvement of the invention, the antenna feed module comprises a duplexer and an antenna unit, wherein one end of the duplexer is connected with the relay switch, and the other end of the duplexer is connected with the antenna unit.
A control method for a high-reliability wireless communication system link backup device comprises the following steps:
step S1, the digital board sends and processes the baseband signal;
step S2, the radio frequency power amplifier module receives the baseband signal sent by the digital board, amplifies and converts the baseband signal into a communication signal and transmits the communication signal to the antenna feeder module;
step S3, the antenna feeder module receives the communication signal sent by the radio frequency power amplifier, converts the communication signal into a wireless communication signal and sends the wireless communication signal;
step S4, when finding that the baseband signal transmission or reception is faulty, the digital board can automatically switch the backup path, ensuring that the communication work continues to work normally.
In the invention, the digital board sends and processes a baseband signal, the radio frequency power amplifier module receives the baseband signal, amplifies and converts the baseband signal into a communication signal and transmits the communication signal to the antenna feeder module, the antenna feeder module receives the communication signal, converts and sends a wireless communication signal, and when the baseband signal in the device is found to be transmitted or received to be failed, the digital board can automatically switch a backup circuit, thereby ensuring that the communication work continues to work normally.
Drawings
For ease of illustration, the present invention is described in detail by the following preferred embodiments and the accompanying drawings.
FIG. 1 is a block diagram of a connection configuration of the present invention;
FIG. 2 is a schematic circuit diagram of an embodiment of the present invention;
FIG. 3 is a block diagram of the steps of the control method of the present invention;
FIG. 4 is a block diagram of the steps of a preferred embodiment of the control method of the present invention;
FIG. 5 is a schematic diagram of the internal circuit connections of the resistor group (R1), the resistor group (R2), the resistor group (R3) and the resistor group (R4) in the present invention;
fig. 6 is a schematic diagram of the internal circuit connection of an embodiment of the power supply unit in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
PA is an abbreviation of Power Amplifier, which is called Power Amplifier for short, and refers to an Amplifier that can generate maximum Power output to drive a certain load under a given distortion rate. The power of the power supply is converted into a current varying according to an input signal by using a current control function of a transistor or a voltage control function of a field effect transistor.
The PA also plays a great role in the era of wide application in the field of the Internet of things at present, and the PA is already applied to a plurality of hot project products, such as: 2.4GHz radio frequency system, ZigBee and related applications thereof, wireless audio system, intelligent home, industrial automation equipment and the like.
In a wireless communication system, in order to solve the problem that the reliability of special sites such as remote sites, severe environments, busy areas and the like is not good enough, a PA or a PA circuit needs to be subjected to backup design, and a baseband signal sending and processing part can be subjected to backup design at the same time, so that double-layer backup can be provided, and the reliability is ensured.
A Micro Control Unit (MCU), also called a Single Chip Microcomputer (Single Chip Microcomputer) or a Single Chip Microcomputer, is a Chip-level computer formed by appropriately reducing the frequency and specification of a Central Processing Unit (CPU), and integrating peripheral interfaces such as a memory, a counter (Timer), a USB, an a/D converter, a UART, a PLC, a DMA, and the like, and even an LCD driving circuit on a Single Chip, and performing different combination control for different application occasions.
An FPGA (Field-Programmable Gate Array) is a product developed further on the basis of Programmable devices such as PAL, GAL, CPLD and the like, and appears as a semi-custom circuit in the Field of Application Specific Integrated Circuits (ASICs), thereby not only solving the defects of the custom circuit, but also overcoming the defect of limited Gate circuits of the original Programmable devices.
As shown in fig. 1 to 6, a high-reliability wireless communication system link backup device of the present invention includes a digital board for transmitting and processing a baseband signal, a radio frequency power amplifier module for receiving the baseband signal and transmitting a communication signal, and an antenna feeder module for receiving the communication signal and converting and transmitting a wireless communication signal; the digital board is provided with an MCU, an FPGA and a digital processing unit which are connected in sequence and used for sending baseband signals, and the digital processing unit is internally provided with two paths of baseband signal transmitting channels, and each baseband signal transmitting channel can be in signal butt joint with at least two communication channels.
Each baseband signal transmitting channel can be selected from two communication channels, and backup can be carried out by selecting one of the two communication channels; that is, for example, there are two baseband signal transmitting channels, each baseband signal transmitting channel is in signal connection with two communication channels, which is equivalent to four signal connection channels, and as long as there is one signal connection, the working and backup signal channels can be performed.
In the invention, the digital board sends and processes a baseband signal, the radio frequency power amplifier module receives the baseband signal, amplifies and converts the baseband signal into a communication signal and transmits the communication signal to the antenna feeder module, the antenna feeder module receives the communication signal, converts and sends a wireless communication signal, and when the baseband signal in the device is found to be transmitted or received to be failed, the digital board can automatically switch a backup circuit, thereby ensuring that the communication work continues to work normally.
Furthermore, a first baseband signal transmitting channel and a second baseband signal transmitting channel are arranged in the digital processing unit, and frequency conversion and signal detection units for detecting baseband signals are arranged in the first baseband signal transmitting channel and the second baseband signal transmitting channel.
The invention provides an implementation mode of a radio frequency power amplifier module, wherein a first communication channel for receiving a baseband signal transmitted by a first baseband signal transmission channel, a second communication channel for receiving a baseband signal transmitted by a second baseband signal transmission channel and a power supply unit for supplying power to the first communication channel and the second communication channel are arranged in the radio frequency power amplifier module; the power supply unit can independently supply power to the first communication channel and the second communication channel.
As shown in fig. 2, a first communication radio frequency circuit is disposed in the first communication channel, and the first communication radio frequency circuit includes a first radio frequency switch (K1), a resistor group (R1), a resistor group (R2), a first combiner, a first PA processing unit (PA1), a first coupler, and a relay switch (K3); one end of a first radio frequency switch (K1) is connected with the first baseband signal transmitting channel, the other end of the first radio frequency switch (K1) is respectively connected with one end of a resistor group (R1) and one end of the resistor group (R3), one end of a first combiner is respectively connected with the other end of the resistor group (R1) and one end of the resistor group (R2), the other end of the first combiner is connected with a first PA processing unit (PA1), the first PA processing unit (PA1) is connected with a first coupler, and the first coupler is connected with a relay switch (K3).
In the present invention, as shown in fig. 5, the resistor group (R1) and the resistor group (R2) are not one resistor, but one resistor group consisting of three resistors. The resistor group (R1) and the resistor group (R2) are used to make the impedance of the bridge and the power amplifier circuit constant (in the embodiment, 50 ohm impedance is constant) during the switching process, so as to improve the reliability of the backup circuit.
As shown in fig. 2, a second communication rf circuit is disposed in the second communication channel, and the second communication rf circuit includes a second rf switch (K2), a resistor group (R3), a resistor group (R4), a second combiner, a second PA processing unit (PA2), and a second coupler; one end of a second radio frequency switch (K2) is connected with the second baseband signal transmitting channel, the other end of the second radio frequency switch (K2) is respectively connected with one end of a resistor group (R4) and the other end of the resistor group (R2), one end of a second combiner is respectively connected with the other end of the resistor group (R3) and the other end of the resistor group (R4), the other end of the second combiner is connected with a second PA processing unit (PA2), the second PA processing unit (PA2) is connected with a second coupler, and the second coupler is connected with a relay switch (K3).
In the present invention, the resistor groups R1 and R2 and the resistor groups R3 and R4 mainly perform port impedance matching on the first and second combiners in a state where the rf switch (K1) and the rf switch K2 are switched, respectively.
In the invention, a first I/O interface and a first detection unit are also arranged in the first communication channel, one end of the first I/O interface is connected with the MCU, the other end of the first I/O interface is connected with the first detection unit, and the first detection unit is connected with a first PA processing unit (PA 1); and realizing the self-adaptive monitoring and control of the MCU on the first communication channel.
Moreover, a second I/O interface and a second detection unit are arranged in the second communication channel, one end of the second I/O interface is connected with the MCU, the other end of the second I/O interface is connected with the second detection unit, and the second detection unit is connected with a second PA processing unit (PA 2); the MCU realizes the self-adaptive monitoring and control of the first communication channel, and realizes the functions of detection, alarm and automatic control of automatic backup; the MCU monitors and controls the dual-channel sampling detection of the digital board, and the detection of various functional circuits such as current detection and alarm, grid voltage detection and alarm, gain detection and alarm temperature detection and alarm, output power detection and advanced circuit of the first PA processing unit (PA1) or the second PA processing unit (PA 2).
In the invention, the power supply unit comprises a power line, and a diode (D1) and a diode (D2) which are connected with the power line; a diode (D1) is connected to the first communication channel, a diode (D2) is connected to the second communication channel; when the grid or the drain of the amplifying tube breaks down and is short-circuited to the ground, in order to prevent the power supply from being short-circuited to cause the backup circuit not to be normally backed up, the diode (D1) and the diode (D2) play a role in isolating the power supply impedance, and the power supply of the backup circuit in the radio frequency power amplifying circuit module is ensured to be unchanged.
The invention provides an embodiment of an antenna feed module, wherein the antenna feed module comprises a duplexer and an antenna unit, one end of the duplexer is connected with a relay switch, and the other end of the duplexer is connected with the antenna unit; the antenna unit comprises an antenna and a feeder line which are connected.
In the invention, 1, two paths of baseband signal transmitting channels are arranged in a digital board; 2. frequency conversion and signal detection units are arranged in the first baseband signal transmitting channel and the first baseband signal transmitting channel, have auxiliary detection and alarm functions and excite the MCU to automatically switch channel backup; 3. the input ends of the radio frequency switches (K1 and K2) are respectively connected with the first baseband signal transmitting channel and the first baseband signal transmitting channel of the digital board, and the output ends of the radio frequency switches are respectively connected with the first combiner and the second combiner, so that no matter the link on the digital board is switched to the first baseband signal transmitting channel or the first baseband signal transmitting channel, the radio frequency switches (K1 or K2) can transmit signals to the radio frequency power amplifier module; the radio frequency switches (K1, K2), the first combiner and the second combiner jointly form a bridge connecting the radio frequency power amplifier module and the digital board; 4. the radio frequency power amplifier module is internally provided with a first detection unit and a second detection unit which have the real-time detection functions of grid voltage detection and alarm, current detection and high-level, temperature detection and alarm, output power detection and alarm and the like, and the series of monitoring information is transmitted to the digital board MCU through I/O interfaces (a first I/O interface and a second I/O interface) to carry out automatic control switching backup; 5. the isolation function of the power supply unit is that when one of the diodes (D1 and D2) breaks down, especially when the grid or drain of the amplifying tube breaks down and is shorted to the ground, in order to prevent the power supply from being shorted to cause the backup circuit to be unable to be backed up normally, the diodes (D1 and D2) play a role in isolating the power supply impedance, so as to ensure that the power supply of the backup circuit PA is not changed, and avoid the situation that the power supply is overloaded and pulled down due to the fault of one of the communication channels, and further cause the backup circuit to be unable to work; for better isolation of power impedance, as shown in fig. 6, diodes D1 are connected in series with D3, and diodes D2 are connected in series with D4.
In the present invention, the internal connection structure of the resistor groups R1, R2, R3 and R4 is shown in fig. 4. In this case, in order to improve reliability, two important measures are mainly taken, that is, firstly, a resistor combination consisting of the resistor group R1, the resistor group R2, the resistor R3 and the resistor R4 is added at the front end of the first combiner or the second combiner to ensure that the 50-ohm impedance exemplified in the embodiment is unchanged during the switching process, so as to improve reliability; secondly, the improvement of the power supply unit is that when the first PA processing unit (PA1) or the second PA processing unit (PA2) is damaged, the output port is grounded, because the output port of the PA is normally a power supply unit (28V power supply), and after such a situation occurs, the power supply unit is directly short-circuited to ground, which causes power supply abnormality of the backup circuit, and therefore, two diode groups of the diode D1 and the diode D2 are adopted to realize power supply isolation.
As shown in fig. 3, the present invention further provides a method for controlling a high-reliability link backup device in a wireless communication system, comprising the following steps:
step S1, the digital board sends and processes the baseband signal;
step S2, the radio frequency power amplifier module receives the baseband signal sent by the digital board, amplifies and converts the baseband signal into a communication signal and transmits the communication signal to the antenna feeder module;
step S3, the antenna feeder module receives the communication signal sent by the radio frequency power amplifier, converts the communication signal into a wireless communication signal and sends the wireless communication signal;
step S4, when finding that the baseband signal transmission or reception is faulty, the digital board can automatically switch the backup path, ensuring that the communication work continues to work normally.
In step S1, the MCU in the digital board performs automatic monitoring, and the digital processing unit sends a baseband signal through one of the baseband signal transmission channels.
In step S2, the power supply unit in the rf power amplifier module is responsible for supplying power, and the first communication channel receives the baseband signal.
In step S4, when the MCU in the digital board monitors that the baseband signal is transmitted or received and a failure occurs in the baseband signal, the MCU controls the digital processing unit to switch another baseband signal transmission channel to transmit the baseband signal, thereby ensuring that the communication operation continues to work normally.
The present invention provides an embodiment, as shown in fig. 2, which is divided into three parts: the digital board comprises an MCU, an FPGA and two digital processing units; the radio frequency power amplifier module comprises a first communication channel, a second communication channel and a power supply unit, wherein a first communication radio frequency circuit in the first communication channel comprises a resistor R1, a resistor R2, a radio frequency switch K1, a first combiner, a first coupler, a first PA processing unit and a relay switch K3; the second communication radio frequency circuit in the second communication channel comprises a resistor R3, a resistor R4, a radio frequency switch K2, a second combiner, a second coupler, a first PA processing unit and a relay switch K3; the antenna feed module comprises a duplexer, a feed cable and an antenna; in addition, the radio frequency power amplifier module also comprises a power supply unit, a first I/O interface and a second I/O interface which are connected with the digital board, so that the MCU can realize the self-adaptive monitoring and control of the radio frequency power amplifier module; the resistors R1 and R2, the resistor group R3 and the resistor group R4 are mainly used for respectively carrying out port impedance matching on the first combiner and the second combiner under the switching state of the radio frequency switches K1 and K2; the baseband signal of the embodiment is realized by a digital board, two channels (a first baseband signal transmitting channel and a second baseband signal transmitting channel) are used for carrying out up-conversion to a radio frequency front end, and signal coupling sampling detection is carried out to judge whether the signal from the baseband to the radio frequency front end normally works or not, the first baseband signal transmitting channel is in a working state at ordinary times, the second baseband signal transmitting channel is in a standby backup state, once the first baseband signal transmitting channel fails, the sampling detection transmits an alarm signal to an MCU for processing, and the FPGA configures the baseband signal to the second baseband signal transmitting channel to realize the backup of the second baseband signal transmitting channel; no matter the first baseband signal transmitting channel works normally or is switched to the second baseband signal transmitting channel backup channel, the radio frequency signal output by the digital board carries out the switching of the first baseband signal transmitting channel and the second baseband signal transmitting channel through the radio frequency switch K1 or K2, and then the signal of the radio frequency switch K1 or K2 is switched to the first communication channel or the second communication channel unit through the first combiner and the second combiner; therefore, 4 backup modes can be provided according to the combination relationship of the two paths of the digital board and the two paths of the radio frequency power amplifier module, and the reliability of the communication system is further improved; meanwhile, no matter the double-channel sampling detection of a digital board, or the detection of double-channel current detection and alarm, grid voltage detection and alarm, gain detection and alarm temperature detection and alarm, output power detection and high-grade and other multiple functional circuits of the radio frequency power amplifier module, the real-time self-adaptive backup control is realized according to the related monitoring specification of the MCU; in addition, the power supply unit simultaneously supplies power to the first communication channel and the second communication channel, and if the grid or drain breakdown of one communication channel causes the DC short circuit to the ground, the power supply unit is isolated by the diodes D1 and D2 without influencing the normal power supply of the communication channel of the backup circuit.
As shown in fig. 4, the present invention further provides a preferable scheme of a control method for a link backup device of a high-reliability wireless communication system, including the following steps:
step S1, the digital board sends and processes the baseband signal;
step S2, the radio frequency power amplifier module receives the baseband signal sent by the digital board, amplifies and converts the baseband signal into a communication signal and transmits the communication signal to the antenna feeder module;
step S3, the antenna feeder module receives the communication signal sent by the radio frequency power amplifier, converts the communication signal into a wireless communication signal and sends the wireless communication signal;
step S4, when finding out that the baseband signal transmitting or receiving fails, the digital board can automatically switch the backup path to ensure the communication work to continue working normally;
and step S5, when the digital processing unit is found to be in fault, the digital edition can automatically switch the backup path, and the communication work is ensured to continue to work normally.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A high-reliability wireless communication system link backup device is characterized by comprising a digital board for sending and processing baseband signals, a radio frequency power amplifier module for receiving the baseband signals, amplifying and converting the baseband signals into communication signals and transmitting the communication signals, and an antenna feeder module for receiving the communication signals, converting and sending the wireless communication signals; the digital board is provided with an MCU, an FPGA and a digital processing unit which are connected in sequence and used for sending baseband signals, the digital processing unit is internally provided with at least two baseband signal transmitting channels, and each baseband signal transmitting channel can be in signal butt joint with at least two communication channels;
a first baseband signal transmitting channel and a second baseband signal transmitting channel are arranged in the digital processing unit, a first communication channel used for receiving baseband signals transmitted by the first baseband signal transmitting channel, a second communication channel used for receiving baseband signals transmitted by the second baseband signal transmitting channel and a power supply unit used for supplying power to the first communication channel and the second communication channel are arranged in the radio frequency power amplifier module, and the power supply unit comprises a power line, and a diode (D1) and a diode (D2) which are connected with the power line; a diode (D1) is connected to the first communication channel, a diode (D2) is connected to the second communication channel;
a first communication radio frequency circuit is arranged in the first communication channel and comprises a first radio frequency switch (K1), a resistor group (R1), a resistor group (R2), a first combiner, a first PA processing unit (PA1), a first coupler and a relay switch (K3); one end of a first radio frequency switch (K1) is connected with a first baseband signal transmitting channel, the other end of the first radio frequency switch (K1) is respectively connected with one end of a resistor group (R1) and one end of a resistor group (R3), one end of a first combiner is respectively connected with the other end of the resistor group (R1) and one end of a resistor group (R2), the other end of the first combiner is connected with a first PA processing unit (PA1), the first PA processing unit (PA1) is further connected with a first coupler, and the first coupler is connected with a relay switch (K3);
a second communication radio frequency circuit is arranged in the second communication channel, and comprises a second radio frequency switch (K2), a resistor group (R3), a resistor group (R4), a second combiner, a second PA processing unit (PA2) and a second coupler; one end of a second radio frequency switch (K2) is connected with the second baseband signal transmitting channel, the other end of the second radio frequency switch (K2) is respectively connected with one end of a resistor group (R4) and the other end of the resistor group (R2), one end of a second combiner is respectively connected with the other end of the resistor group (R3) and the other end of the resistor group (R4), the other end of the second combiner is connected with a second PA processing unit (PA2), the second PA processing unit (PA2) is connected with a second coupler, and the second coupler is connected with a relay switch (K3).
2. The apparatus as claimed in claim 1, wherein the first baseband signal transmitting channel and the second baseband signal transmitting channel are each provided with a frequency conversion and signal detection unit for detecting baseband signals.
3. The device of claim 1, wherein a first I/O interface and a first detection unit are further disposed in the first communication channel, one end of the first I/O interface is connected to the MCU, the other end of the first I/O interface is connected to the first detection unit, and the first detection unit is connected to the first PA processing unit (PA 1).
4. The device of claim 1, wherein a second I/O interface and a second detection unit are further disposed in the second communication channel, one end of the second I/O interface is connected to the MCU, the other end of the second I/O interface is connected to the second detection unit, and the second detection unit is connected to the second PA processing unit (PA 2).
5. The device of claim 1, wherein the antenna feeder module comprises a duplexer and an antenna unit, one end of the duplexer is connected to the relay switch, and the other end of the duplexer is connected to the antenna unit.
6. A method for controlling a link backup device of a high-reliability wireless communication system, which is applied in the link backup device of the high-reliability wireless communication system as claimed in claim 1, the method comprising the steps of:
step S1, the digital board sends and processes the baseband signal;
step S2, the radio frequency power amplifier module receives the baseband signal sent by the digital board, amplifies and converts the baseband signal into a communication signal and transmits the communication signal to the antenna feeder module;
step S3, the antenna feeder module receives the communication signal sent by the radio frequency power amplifier, converts the communication signal into a wireless communication signal and sends the wireless communication signal;
step S4, when finding that the baseband signal transmission or reception is faulty, the digital board can automatically switch the backup path, ensuring that the communication work continues to work normally.
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| CN201811281550.XA CN109348493B (en) | 2018-10-24 | 2018-10-24 | High-reliability wireless communication system link backup device and control method thereof |
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| CN201811281550.XA CN109348493B (en) | 2018-10-24 | 2018-10-24 | High-reliability wireless communication system link backup device and control method thereof |
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| CN109348493A CN109348493A (en) | 2019-02-15 |
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| CN114710180A (en) * | 2022-04-01 | 2022-07-05 | Oppo广东移动通信有限公司 | Radio frequency processing circuit control method, radio frequency system and wireless communication equipment |
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| CN1863364A (en) * | 2006-01-24 | 2006-11-15 | 华为技术有限公司 | Method and system for back-up of cell baseband data channel |
| CN103024783A (en) * | 2011-09-21 | 2013-04-03 | 中兴通讯股份有限公司 | Baseband resource hot backup system and baseband resource hot backup method |
| CN107547148A (en) * | 2016-06-27 | 2018-01-05 | 中兴通讯股份有限公司 | Radio frequency test system and method with interior relay base station return path emitter |
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| JP4323968B2 (en) * | 2004-01-14 | 2009-09-02 | 株式会社日立コミュニケーションテクノロジー | Timing adjustment method for wireless communication device |
| WO2014160709A2 (en) * | 2013-03-25 | 2014-10-02 | Altiostar Networks, Inc. | Systems and methods for scheduling of data packets based on delay tolerance of applications |
| CN105375977A (en) * | 2015-08-31 | 2016-03-02 | 南京泰通科技股份有限公司 | GSM-R radio remote base station equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1863364A (en) * | 2006-01-24 | 2006-11-15 | 华为技术有限公司 | Method and system for back-up of cell baseband data channel |
| CN103024783A (en) * | 2011-09-21 | 2013-04-03 | 中兴通讯股份有限公司 | Baseband resource hot backup system and baseband resource hot backup method |
| CN107547148A (en) * | 2016-06-27 | 2018-01-05 | 中兴通讯股份有限公司 | Radio frequency test system and method with interior relay base station return path emitter |
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