CN111181658B - Communication test system - Google Patents
Communication test system Download PDFInfo
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- CN111181658B CN111181658B CN201911365360.0A CN201911365360A CN111181658B CN 111181658 B CN111181658 B CN 111181658B CN 201911365360 A CN201911365360 A CN 201911365360A CN 111181658 B CN111181658 B CN 111181658B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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Abstract
The disclosure provides a communication test system, and belongs to the technical field of communication. The system comprises: the method comprises the following steps: the communication test device is used for data decapsulation and modulation and demodulation and the channel adapter is used for digital-to-analog conversion and data receiving and transmitting; the communication test device comprises a modem and a network controller electrically connected with the modem, wherein the modem is provided with an interface, and the channel adapter is arranged on the modem in a pluggable mode through the interface. This is disclosed separates out as the channel adapter through being used for digital-to-analog conversion and data receiving and dispatching's module in the modem among the communication test system to reduce the complexity of modem, realize communication test system's miniaturized purpose, and the channel adapter can be connected with communication testing arrangement through pluggable interface, can insert communication testing arrangement when needing the test, extract when not needing, the use of the very big aspect testing personnel.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a communication test system.
Background
With the continuous development of communication technology, communication devices are becoming the type of devices that are found everywhere in life and production. For communication equipment in a scene such as a ship, the communication quality of the communication equipment is related to whether the communication equipment can be put into use. Therefore, before the communication device is used, a communication test is usually performed, for example, a communication measurement system and the communication device to be tested constitute a transceiver, and a communication test is performed, thereby detecting the communication quality.
The aforementioned communication test system generally includes a modem and a network controller. Taking a communication test system as an example of a sending end, a network controller is responsible for encrypting data and packaging formats, and then transmitting data and a control instruction to a modem; the modem is responsible for coding and modulating data, generating digital signals, and performing digital-to-analog conversion according to a transmission channel to obtain analog signals and transmit the analog signals.
In carrying out the present disclosure, the inventors found that at least the following problems exist in the related art: the communication test system in the related art has a complex structure of the modem due to the function of the modem in the communication test system, which affects the volume of the communication test system.
Disclosure of Invention
The embodiment of the disclosure provides a communication test system, and the volume of the communication test system is reduced. The technical scheme is as follows:
in one aspect, an embodiment of the present disclosure provides a communication test system, including: the communication test device is used for data decapsulation and modulation and demodulation and the channel adapter is used for digital-to-analog conversion and data receiving and transmitting; the communication test device comprises a modem and a network controller electrically connected with the modem, wherein the modem is provided with an interface, and the channel adapter is arranged on the modem in a pluggable mode through the interface.
In one implementation of the present disclosure, the modem is a modem integrated on a digital signal processor and the interface is a host interface bus interface.
In one implementation of the present disclosure, the modem is a modem integrated on a field programmable gate array;
the channel adapter is integrated on the digital signal processor, and the interface is a parallel conversion interface; or, the channel adapter is a channel adapter integrated on a field programmable gate array, and the interface is a high-speed serial bus interface.
In one implementation of the present disclosure, the communication test system includes: a plurality of the communication test devices and one of the channel adapters matched with the plurality of the communication test devices.
In one implementation of the present disclosure, the network controller includes:
the encryption module is used for encrypting the data to be transmitted to generate encrypted data;
and the format packaging module is used for carrying out format packaging processing on the encrypted data generated by the encryption module to generate a first data message and sending the first data message and the first control parameter to the modem.
In one implementation of the present disclosure, the modem includes:
the error correction coding module is used for carrying out error correction coding processing on the first data message based on the first control parameter output by the format packaging module to generate coded data;
the interleaving module is used for interleaving the encoded data generated by the error correction encoding module to generate interleaved data;
the modulation module is used for modulating the interleaved data generated by the interleaving module to generate a modulation signal;
and the synchronization head module is used for performing synchronization head processing on the modulation signal generated by the modulation module to generate a first digital signal.
In an implementation manner of the present disclosure, the channel adapter is configured to perform digital-to-analog conversion on a first digital signal generated by the synchronization head module according to a transmission channel, obtain a first analog signal, and send the first analog signal.
In one implementation of the present disclosure, the channel adapter is configured to perform digital-to-analog conversion on a second analog signal sampled from a transmission channel, obtain a second digital signal, and send the second digital signal to the modem.
In one implementation of the present disclosure, the modem further includes:
the frame synchronization module is used for carrying out frame synchronization processing on the second digital signal to generate a frame synchronization signal;
the demodulation module is used for demodulating the frame synchronization signal generated by the frame synchronization module to generate a demodulation signal;
the de-interleaving module is used for de-interleaving the demodulation signal generated by the demodulation module to generate de-interleaved data;
and the error correction decoding module is used for carrying out error correction decoding processing on the de-interleaving data generated by the de-interleaving module to generate the second data message and the second control parameter and sending the second data message and the second control parameter to the network controller.
In another implementation manner of the present disclosure, the network controller further includes:
the format analysis module is used for carrying out format analysis processing on the second data message based on the second control parameter output by the error correction decoding module to generate analysis data;
and the decryption module is used for decrypting the analysis data generated by the format analysis module to generate transmission data.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects: this is disclosed separates out as the channel adapter through being used for digital-to-analog conversion and data receiving and dispatching's module in the modem with among the communication test system to reduce the complexity of modem, realize communication test system's miniaturized purpose, and the channel adapter can be connected with the communication testing arrangement through pluggable interface, can plug into the communication testing arrangement when needing the test, extract when not needing, the use of the very big aspect testing personnel.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 shows a schematic structural diagram of a communication test system provided in an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating a data transmission process of a communication test system according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a network controller according to an embodiment of the present disclosure;
fig. 4 shows a schematic structural diagram of a modem according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a communication test system according to an embodiment of the present disclosure. As shown in fig. 1, the communication test system includes: a communication test device 1 for data decapsulation and modulation and demodulation and a channel adapter 2 for digital-to-analog conversion and data receiving and transmitting; the communication test device 1 includes a modem 101 and a network controller 102 electrically connected to the modem 101, wherein an interface is provided on the modem 101, and the channel adapter 2 is provided on the modem 101 in a pluggable manner through the interface.
In the embodiment of the disclosure, the module for digital-to-analog conversion and data transceiving in the modem in the communication test system is separated as the channel adapter, so that the complexity of the modem is reduced, and the purpose of miniaturization of the communication test system is achieved.
Fig. 2 shows a schematic diagram of a data transmission process of a communication test system according to an embodiment of the present disclosure. As shown in fig. 2, taking the data transmission process of the communication test system as an example: the network controller 102 encrypts and format-packages the data to obtain a data message and a control parameter, and the modem 101 performs error correction coding, interleaving, modulation and synchronization header addition according to the data message and the control parameter sent by the network controller 102 to generate a digital signal; the digital signal is transmitted to the channel adapter 2, is subjected to digital-to-analog conversion by the channel adapter 2, and is transmitted. The data receiving process is the reverse of the data transmitting process, and can be seen in fig. 2.
The modem 101 outputs the Digital signal to the channel adapter 2 through an interface, and the channel adapter 2 performs Digital-to-Analog conversion through a Digital-to-Analog conversion (DA) interface, and then selects a matched channel to transmit the channel to a receiving party. Similarly, in the data receiving process, the channel adapter 2 first performs sampling through an Analog-to-Digital converter (AD) interface to obtain a Digital signal transmitted by the sender, and then transmits the Digital signal to the modem 101 for demodulation.
In the data transmission process, in order to ensure the continuity and the correctness of the transmission data, the communication test system is provided with a flow control protocol which ensures that the sampling rate is consistent with the generation rate of the digital signal of the sender, thereby ensuring that the demodulation and decoding process of the transmission data is error-free. That is, the AD interface samples the signal at a set sampling rate, which is the generation rate of the digital signal of the transmitting side.
In an embodiment of the present disclosure, the communication test system may be an audio communication test system, in which case the digital signal is digitized baseband audio waveform data. In other embodiments of the present disclosure, the communication test system may also be a communication test system for other types of signals.
In the embodiment of the present disclosure, the communication test system may be a wired communication test system or a wireless communication test system.
In some embodiments of the present disclosure, the channel adapter 2 may be integrated on a Digital Signal Processor (DSP) or a Field Programmable Gate Array (FPGA).
In some embodiments of the present disclosure, modem 101 is a DSP integrated modem 101; in this case, the channel adapter 2, whether it is the channel adapter 2 integrated in the DSP or the channel adapter 2 integrated in the FPGA, may be a Host Port Interface (HPI), and the channel adapter 2 and the modem 101 are connected by the HPI Interface.
In some embodiments of the present disclosure, the modem 101 is a modem 101 integrated on a FGPA; at this time, the type of the interface is determined by integrating the channel adapter 2 on the DSP or on the FPGA.
For example, when channel adapter 2 is integrated on a DSP, the interface may be a Serdes interface, i.e. channel adapter 2 and modem 101 are connected via a Serdes interface. When the channel adapter 2 is integrated on an FPGA, this interface may be a high-speed serial bus interface (RapidIO), i.e. the channel adapter 2 and the modem 101 are connected via a RapidIO bus interface.
In some embodiments of the present disclosure, the network controller 102 may be integrated on a Central Processing Unit (CPU), that is, the network controller 102 is the network controller 102 integrated on the CPU.
In some embodiments of the present disclosure, the modem 101 and the network controller 102 may be integrated on the same integrated circuit board, thereby facilitating assembly of the entire communication test system.
In some embodiments of the present disclosure, the communication test system may include: a plurality of communication test apparatuses 1 and one channel adapter 2 that matches the plurality of communication test apparatuses 1. In practical applications, the channel adapter 2 can be multiplexed into a plurality of communication test systems, thereby reducing the cost of the communication test systems.
Fig. 3 shows a schematic structural diagram of the network controller 102 according to an embodiment of the present disclosure. As shown in fig. 3, the network controller 102 may include:
an encryption module 1021, configured to encrypt data to be transmitted to generate encrypted data;
the format encapsulation module 1022 is configured to perform format encapsulation processing on the encrypted data generated by the encryption module 1021 to generate a first data packet, and send the first data packet and a first control parameter to the modem 101, where the first control parameter refers to the working mode information of the first data packet and the sending rate of the first data packet.
When data is sent, the network controller 102 encrypts and format-encapsulates the data to be transmitted through the encryption module 1021 and the format encapsulation module 1022, generates a data packet and a control parameter, and transmits the control parameter and the data packet to the modem 101 through an Input/Output (I/O) interface for subsequent processing.
The modules referred to in the embodiments of the present disclosure may be implemented by an integrated circuit on a chip, or by software in a memory on the chip, or by a combination of the above two ways.
Fig. 4 shows a schematic structural diagram of the modem 101 according to an embodiment of the present disclosure. As shown in fig. 4, the modem 101 may include: an error correction coding module 1011, configured to perform error correction coding processing on the first data packet based on the first control parameter output by the format encapsulation module 1022, and generate coded data;
an interleaving module 1012, configured to perform interleaving processing on the encoded data generated by the error correction encoding module 1011 to generate interleaved data;
a modulation module 1013, configured to perform modulation processing on the interleaved data generated by the interleaving module 1012 to generate a modulation signal;
and a sync head module 1014 for performing a sync head process on the modulation signal generated by the modulation module 1013 to generate a first digital signal.
When data is transmitted, the modem 101 performs error correction coding, interleaving, modulation and synchronization header processing on the data packet transmitted by the network controller 102 through the error correction coding module 1011, the interleaving module 1012, the modulation module 1013 and the synchronization header module 1014 according to the control parameters to form a digital signal, transmits the digital signal to the channel adapter 2, and transmits the digital signal to the receiving side through the channel adapter 2.
When data transmission is performed, the channel adapter 2 performs digital-to-analog conversion on the first digital signal generated by the sync head module 1014 after selecting a transmission channel, obtains a first analog signal, and transmits the first analog signal.
In practical applications, the channel adapter 2 may include a DA interface, and after receiving the digital signal sent by the modem 101, the channel adapter 2 selects a transmission channel according to the digital signal and then converts the digital signal into an analog signal through the DA interface to send the analog signal to the receiving party.
In the disclosed embodiment, the channel adapter 2 may select an appropriate channel for signaling based on the aforementioned first control parameter. That is, the modem 101 transmits the first control parameter to the channel adapter 2, and the channel adapter 2 selects a channel according to the first control parameter.
In the embodiment of the present disclosure, the first control parameter is used to indicate the operation mode information of data transmission, the transmission rate, and the like, and the transmission rate is used to indicate the rate of modulation coding and the rate of DA conversion. The operating mode may indicate information such as a modulation scheme, a coding scheme, and a frequency band selected for transmission.
The first control parameter is output from the network controller 102 to the modem 101, and is output from the modem 101 to the channel adapter 2. The first control parameter of the network controller 102 may be generated through configuration, or may be obtained through interaction with a peer device under test.
The foregoing module structures are all used in the signal transmission process, and the following further describes modules used in the signal reception process:
in some embodiments of the present disclosure, the channel adapter 2 is configured to perform digital-to-analog conversion on a second analog signal sampled from the transmission channel to obtain a second digital signal, and send the second digital signal to the modem. In practical applications, the channel adapter 2 performs AD sampling from the transmission channel at a specific sampling rate, which means that the sampling rate of the channel adapter 2 is consistent with the rate of transmitting data from the transmitting side, to obtain a digital signal, and then the channel adapter 2 transmits the digital signal to the modem 101 through the interface.
As shown in fig. 4, the modem 101 may further include: the frame synchronization module 1015: performing frame synchronization processing on the second digital signal to generate a frame synchronization signal; a demodulation module 1016, configured to demodulate the frame synchronization signal generated by the frame synchronization module 1015 to generate a demodulated signal; a de-interleaving module 1017, configured to perform de-interleaving processing on the demodulated signal generated by the demodulation module 1016 to generate de-interleaved data; an error correction decoding module 1018, configured to perform error correction decoding processing on the deinterleaved data generated by the deinterleaving module 1017, generate a second data packet and a second control parameter, and send the second data packet and the second control parameter to the network controller 102.
In the embodiment of the present disclosure, the second control parameter functions similarly to the first control parameter, and is also operation mode information for indicating data reception, a reception rate for indicating a rate of demodulation and decoding and a rate of AD conversion, and the like. The operation mode may indicate a demodulation mode, a decoding mode, receiving information of a selected frequency band, and the like.
The second control parameter is obtained in the same manner as the first control parameter, for example, by analyzing data sent by the peer device. Of course, it can be obtained by configuration.
During data receiving, the modem 101 performs frame synchronization capturing, demodulation, deinterleaving, and error correction decoding on the digital signal sent by the channel adapter 2 through the frame synchronization module 1015, the demodulation module 1016, the deinterleaving module 1017, and the error correction decoding module 1018, generates corresponding control parameters and data packets, and transmits the control parameters and the data packets to the network controller 102.
As shown in fig. 3, the network controller 102 may further include: the format analyzing module 1023 is used for carrying out format analyzing processing on the second data message based on the second control parameter output by the error correction decoding module 1018 to generate analyzed data 1024; and the decryption module is configured to decrypt the analysis data generated by the format analysis module 1023 to generate transmission data.
When receiving data, the network controller 102 performs format parsing and decryption processing on the data packet sent by the modem 101 according to the control parameters to obtain transmission data sent by the sender, thereby completing the data receiving process.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (7)
1. A communication test system, comprising: the communication test device is used for data decapsulation and modulation and demodulation and the channel adapter is used for digital-to-analog conversion and data receiving and transmitting;
the communication testing device comprises a modem and a network controller electrically connected with the modem, wherein the modem is provided with an interface, and the channel adapter is arranged on the modem in a pluggable manner through the interface; in the data sending process, the modem outputs digital signals to the channel adapter through the interface, and the channel adapter selects a matched channel to send to a receiving party after performing digital-to-analog conversion through the digital-to-analog conversion interface; in the data receiving process, the channel adapter samples through an analog-to-digital conversion interface to obtain a digital signal transmitted by a sender, and then transmits the digital signal to the modem for demodulation processing;
the communication test system is an audio communication test system, the digital signal is digitized baseband audio waveform data, the communication test system includes: a plurality of said communication test devices and one said channel adapter mated to a plurality of said communication test devices;
the modem is integrated on the digital signal processor, and the interface is a host interface bus interface; the channel adapter is a channel adapter integrated on a digital signal processor, or the channel adapter is a channel adapter integrated on a field programmable gate array;
or, the modem is a modem integrated on a field programmable gate array; the channel adapter is integrated on the digital signal processor, and the interface is a parallel conversion interface; or, the channel adapter is integrated on the field programmable logic gate array, and the interface is a high-speed serial bus interface.
2. The communication test system of claim 1, wherein the network controller comprises:
the encryption module is used for encrypting the data to be transmitted to generate encrypted data;
and the format packaging module is used for carrying out format packaging processing on the encrypted data generated by the encryption module to generate a first data message and sending the first data message and the first control parameter to the modem.
3. The communication test system of claim 2, wherein the modem comprises:
the error correction coding module is used for carrying out error correction coding processing on the first data message based on the first control parameter output by the format packaging module to generate coded data;
the interleaving module is used for interleaving the encoded data generated by the error correction encoding module to generate interleaved data;
the modulation module is used for modulating the interleaved data generated by the interleaving module to generate a modulation signal;
and the synchronization head module is used for performing synchronization head processing on the modulation signal generated by the modulation module to generate a first digital signal.
4. The communication test system according to claim 3, wherein the channel adapter is configured to perform digital-to-analog conversion on the first digital signal generated by the synchronization head module according to the transmission channel to obtain a first analog signal and transmit the first analog signal.
5. The communication test system of claim 1, wherein the channel adapter is configured to perform digital-to-analog conversion on a second analog signal sampled from the transmission channel to obtain a second digital signal, and send the second digital signal to the modem.
6. The communication test system of claim 5, wherein the modem comprises:
the frame synchronization module is used for carrying out frame synchronization processing on the second digital signal to generate a frame synchronization signal;
the demodulation module is used for demodulating the frame synchronization signal generated by the frame synchronization module to generate a demodulation signal;
the de-interleaving module is used for performing de-interleaving processing on the demodulation signal generated by the demodulation module to generate de-interleaved data;
and the error correction decoding module is used for carrying out error correction decoding processing on the de-interleaving data generated by the de-interleaving module, generating a second data message and a second control parameter, and sending the second data message and the second control parameter to the network controller.
7. The communication test system of claim 6, wherein the network controller comprises:
the format analysis module is used for carrying out format analysis processing on the second data message based on the second control parameter output by the error correction decoding module to generate analysis data;
and the decryption module is used for decrypting the analysis data generated by the format analysis module to generate transmission data.
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| CN111181658A (en) | 2020-05-19 |
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