CN114142917A - Satellite channel selection method and device - Google Patents

Satellite channel selection method and device Download PDF

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Publication number
CN114142917A
CN114142917A CN202210041234.5A CN202210041234A CN114142917A CN 114142917 A CN114142917 A CN 114142917A CN 202210041234 A CN202210041234 A CN 202210041234A CN 114142917 A CN114142917 A CN 114142917A
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channel
satellite
data
noise ratio
error rate
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CN114142917B (en
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李世响
尹曙明
安建
何贤德
朱丽红
李孟
骆骁
刘善军
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Pla 61096 Unit
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service

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  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Radio Relay Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

The application provides a satellite channel selection method and a satellite channel selection device, wherein the satellite channel selection method comprises the following steps: receiving a channel test request, and determining a first channel and a second channel based on the channel test request, wherein the first channel is a data transmission channel, and the second channel is an error code test channel; determining a signal-to-noise ratio value of the first channel based on the service data received by the first channel, and determining a channel error rate of the second channel based on the test data sent by the second channel; generating a channel switching instruction under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold; and responding to the channel switching instruction, switching the first channel into an error code testing channel, and switching the second channel into a data transmission channel. The satellite channel selection method improves the reliability of satellite communication service, is easy to construct by relying on the existing earth terminal, and is low in cost.

Description

Satellite channel selection method and device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a satellite channel selection method. The application also relates to a satellite channel selection apparatus, a computing device, and a computer-readable storage medium.
Background
Satellite communication has the advantages of wide coverage, no restriction by geographical environment, excellent capability of resisting natural disasters and the like, so that satellite communication is increasingly applied, and the transmission traffic of the satellite communication is increasingly large. However, the satellite channel is a wireless channel, and the openness of the satellite channel causes the satellite channel to be easily interfered by the outside world, thereby affecting the service communication quality.
Therefore, how to detect the channel transmission condition of the wireless channel, so as to improve the communication quality between the satellite and the earth terminal, is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present application provides a method for selecting a satellite channel. The application also relates to a satellite channel selection device, a computing device and a computer readable storage medium, which are used for solving the problem that the wireless channel is easy to interfere and influence the communication transmission quality in the prior art.
According to a first aspect of embodiments of the present application, there is provided a satellite channel selection method, including:
receiving a channel test request, and determining a first channel and a second channel based on the channel test request, wherein the first channel is a data transmission channel, and the second channel is an error code test channel;
determining a signal-to-noise ratio value of the first channel based on the service data received by the first channel, and determining a channel error rate of the second channel based on the test data sent by the second channel;
generating a channel switching instruction under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold;
and responding to the channel switching instruction, switching the first channel into an error code testing channel, and switching the second channel into a data transmission channel.
Optionally, determining the signal-to-noise ratio of the first channel based on the traffic data received by the first channel includes:
determining a modem in the first channel that receives and processes traffic data;
obtaining, in the modem, a signal-to-noise ratio value for the first channel.
Optionally, before receiving the channel test request, the method further includes:
a channel creation request is received, and a first channel and a second channel are created based on the channel creation request.
Optionally, determining a channel error rate of the second channel based on the test data sent by the second channel includes:
transmitting test data to a target satellite based on the second channel;
receiving to-be-processed test data returned by the target satellite based on the test data;
and determining the channel error rate of the second channel according to the test data and the test data to be processed.
Optionally, calculating a channel error rate of the second channel according to the test data and the test data to be processed includes:
counting test data bit values of the test data and to-be-processed test data bit values of the to-be-processed test data;
and calculating the channel error rate of the second channel based on the test data bit value and the to-be-processed test data bit value.
Optionally, before generating the channel switching instruction under the condition that the signal-to-noise ratio is smaller than the preset signal-to-noise ratio threshold and the channel error rate is smaller than the preset error rate threshold, the method further includes:
and determining the preset signal-to-noise ratio threshold value based on the data modulation mode and the data coding mode of the first channel.
Optionally, the method further comprises:
and generating a channel abnormal alarm under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is greater than or equal to a preset error rate threshold.
Optionally, in response to the channel switching instruction, switching the first channel to an error code test channel, and switching the second channel to a data transmission channel includes:
determining a control parameter in the channel switching instruction, wherein the control parameter comprises a first channel mode identifier and a second channel identifier;
switching the first channel from a data transmission channel to an error code test channel based on the first channel mode identification;
and switching the second channel from an error code testing channel to a data transmission channel based on the second channel mode identification.
According to a second aspect of the embodiments of the present application, there is provided a satellite channel selection apparatus, including:
the device comprises a receiving module, a sending module and a receiving module, wherein the receiving module is configured to receive a channel test request and determine a first channel and a second channel based on the channel test request, the first channel is a data transmission channel, and the second channel is an error code test channel;
a determining module configured to determine a signal-to-noise ratio value of the first channel based on traffic data received by the first channel, and determine a channel error rate of the second channel based on test data transmitted by the second channel;
the generating module is configured to generate a channel switching instruction under the condition that the signal-to-noise ratio value is smaller than a preset signal-to-noise ratio threshold value and the channel error rate is smaller than a preset error rate threshold value;
and the switching module is configured to respond to the channel switching instruction, switch the first channel into an error code testing channel and switch the second channel into a data transmission channel.
According to a third aspect of embodiments herein, there is provided a computing device comprising a memory, a processor and computer instructions stored on the memory and executable on the processor, the processor implementing the steps of the satellite channel selection method when executing the computer instructions.
According to a fourth aspect of embodiments herein, there is provided a computer readable storage medium storing computer instructions which, when executed by a processor, implement the steps of the satellite channel selection method.
The satellite channel selection method receives a channel test request, and determines a first channel and a second channel based on the channel test request, wherein the first channel is a data transmission channel, and the second channel is an error code test channel; determining a signal-to-noise ratio value of the first channel based on the service data received by the first channel, and determining a channel error rate of the second channel based on the test data sent by the second channel; generating a channel switching instruction under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold; and responding to the channel switching instruction, switching the first channel into an error code testing channel, and switching the second channel into a data transmission channel.
According to the satellite channel selection method in one embodiment of the application, channel quality testing is performed on the first channel and the second channel, and switching between the first channel and the second channel is added, so that the reliability of satellite data transmission service is improved, and the problems of low data transmission quality, low efficiency and the like between a satellite and an earth terminal caused by interference of a wireless channel are solved.
Drawings
Fig. 1 is a flowchart of a satellite channel selection method according to an embodiment of the present application;
fig. 2 is a process flow diagram of a satellite channel selection method applied to a satellite a and a satellite B according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a channel provided by an embodiment of the present application;
FIG. 4 is a schematic diagram of an automatic routing device for signal vehicles according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a satellite channel selection apparatus according to an embodiment of the present application;
fig. 6 is a block diagram of a computing device according to an embodiment of the present application.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit of this application and is therefore not limited to the specific implementations disclosed below.
The terminology used in the one or more embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of the present application. As used in one or more embodiments of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used in one or more embodiments of the present application is intended to encompass any and all possible combinations of one or more of the associated listed items.
It will be understood that, although the terms first, second, etc. may be used herein in one or more embodiments of the present application to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first aspect may be termed a second aspect, and, similarly, a second aspect may be termed a first aspect, without departing from the scope of one or more embodiments of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
First, the noun terms to which one or more embodiments of the present application relate are explained.
Wireless channel: a transparent path between a transmitting end and a receiving end in wireless communications.
In order to solve the problems that a wireless channel is easily interfered and the service communication quality is influenced, the satellite data routing device is arranged at the earth terminal and is matched with a satellite communication channel terminal for use, and the reliable transmission of satellite data can be realized under the condition of double satellites.
In the present application, a satellite channel selection method is provided, and the present application relates to a satellite channel selection apparatus, a computing device, and a computer-readable storage medium, which are described in detail in the following embodiments one by one.
Fig. 1 shows a flowchart of a satellite channel selection method according to an embodiment of the present application, which specifically includes the following steps:
step 102: receiving a channel test request, and determining a first channel and a second channel based on the channel test request, wherein the first channel is a data transmission channel, and the second channel is an error code test channel.
At present, a wireless channel established between a satellite and a ground terminal is easily interfered by the outside due to the openness of the wireless channel, so that the transmission quality of service data in the wireless channel is affected. In order to avoid the influence caused by low transmission quality of the wireless channel, the bit error rate of the wireless channel is often required to be tested; however, in practical applications, real-time transmission of service data and error rate testing of a wireless channel cannot be performed simultaneously in the same wireless channel, and thus real-time monitoring of error rate of a channel for real-time transmission of service data cannot be achieved.
In order to solve the problem that service data transmission and error rate detection cannot be simultaneously performed in the same channel, before a channel test request is received, communication connections between two different satellites and a target earth terminal are respectively established, wherein the earth terminal can be an earth station, a signal vehicle and other terminals capable of receiving satellite communication data, namely two different wireless channels are established between the satellites and the earth terminal, for example, a satellite A and a satellite B are determined, a wireless channel between the satellite A and the earth station is established, and a wireless channel between the satellite B and the earth station is established.
Specifically, after receiving a channel test request, determining a channel identifier in the channel test request, and determining a first channel and a second channel corresponding to the channel identifier based on the channel identifier, where the first channel and the second channel are channels established between a satellite and an earth terminal before receiving the channel test request; the channel test request refers to a request for testing the channel transmission quality of a channel between a satellite and an earth terminal; the channel identification refers to a field that can uniquely represent a channel, for example, channel identifications "c 1", "c 2", and the like; the first channel is a channel which can carry out real-time transmission of service data between a satellite and an earth terminal or carry out error rate detection; the second channel is also a channel which can carry out real-time transmission of service data between the satellite and the earth terminal or carry out error rate detection; the first channel can be used for carrying out real-time transmission of service data, and the second channel is used for carrying out error rate detection, or the first channel is used for carrying out error rate detection, and the second channel is used for carrying out real-time transmission of service data between a satellite and an earth terminal, namely the two channels are respectively subjected to different data processing.
The data transmission channel refers to a channel in a data transmission mode, and the error code test channel refers to a channel in an error code test mode; the channels in the application all comprise two data processing modes, namely a data transmission mode and an error code testing mode, and one of the data processing modes can be triggered randomly to be used for processing data.
In this embodiment, for convenience of subsequent statement, the first channel is used as a data transmission channel for transmitting service data between the satellite and the earth terminal, and the second channel is used as an error code test channel for performing error code test.
In a specific embodiment of the present application, taking a satellite a and a satellite B as an example, it is determined that the satellite a and the satellite B are respectively used for transmission of service data and detection of channel transmission quality; establishing a first channel between the satellite A and the signal vehicle, and establishing a second channel between the satellite B and the signal vehicle; after receiving the channel test request, determining a first channel and a second channel which are established in advance, setting the first channel as a data transmission channel, and setting the second channel as an error code test channel.
According to the scheme, two different channels are established between the received channel test requests, so that two different channels for data transmission and error code test can be determined subsequently; after receiving the channel test request, determining two pre-established channels based on the channel test request, and setting the channels to different data processing modes, so as to facilitate the subsequent processing of service data between the satellite and the earth terminal based on the two channels.
Step 104: and determining the signal-to-noise ratio of the first channel based on the service data received by the first channel, and determining the channel error rate of the second channel based on the test data sent by the second channel.
And after determining two different channels and determining different data processing modes of the two channels, carrying out channel quality test on the channels based on the two channels.
In this embodiment, the first channel is set as a channel for transmitting the traffic data between the satellite and the earth terminal in real time, and the signal-to-noise ratio of the first channel may be determined according to a modem processing the traffic data, so as to measure the current data transmission quality of the first channel based on the signal-to-noise ratio.
In practical applications, determining the signal-to-noise ratio of the first channel based on the traffic data received by the first channel includes:
determining a modem in the first channel that receives and processes traffic data;
obtaining, in the modem, a signal-to-noise ratio value for the first channel.
Wherein, the modem refers to the transmission in the first channelAn electronic device for modulating and demodulating service data between an input satellite and an earth terminal generally comprises a modulator and a demodulator, wherein a sending end of the modem can modulate a digital signal generated by a computer into an analog signal, and a receiving end of the modem can convert the input calculated analog signal into a responsive digital signal; the SNR value refers to the bit SNR, i.e. Eb/N0Wherein E isbIs the signal energy averaged over each bit, N0Power spectral density that is noise; service data refers to data transmitted between a satellite and an earth terminal, such as satellite positioning data, satellite television data, and the like; after determining a modem corresponding to the first channel, that is, a modem that processes service data transmitted in the first channel is determined, acquiring a current signal-to-noise ratio value from attribute information of the modem, and taking the currently acquired signal-to-noise ratio value as the current signal-to-noise ratio value of the first channel.
In an embodiment of the present application, taking the first channel as an example, determining the positioning data transmitted in the first channel, determining the modem G processing the positioning data, and obtaining a signal-to-noise ratio when the positioning data is processed in the attribute information of the modem G, and taking the signal-to-noise ratio as the signal-to-noise ratio of the first channel.
The modem corresponding to the first channel is determined, the signal-to-noise ratio value is obtained from the attribute information of the modem and is used as the current signal-to-noise ratio value of the first channel, and therefore the transmission quality of the first channel can be conveniently determined based on the signal-to-noise ratio value of the first channel.
While the signal-to-noise ratio of the first channel for real-time transmission of the service data is determined, the transmission quality of the second channel, that is, the channel error rate of the second channel, may be determined based on the test data sent by the second channel.
Specifically, determining the channel error rate of the second channel based on the test data sent by the second channel includes:
transmitting test data to a target satellite based on the second channel;
receiving to-be-processed test data returned by the target satellite based on the test data;
and determining the channel error rate of the second channel according to the test data and the test data to be processed.
The test data refers to data for testing the channel error rate, for example, the channel test data is a data sequence "123445", and the application is not limited specifically; the to-be-processed test data refers to data returned by the target satellite based on the second channel, and under the condition that the channel communication quality of the second channel is good, the test data and the to-be-processed data can be the same, namely the test data sent to the target satellite are all returned to the earth terminal, and the problems of data loss and the like do not occur in the transmission process; the target satellite is a satellite for receiving test data and testing the channel error rate; the to-be-processed test data refers to data returned by the target satellite through a channel between the target satellite and the earth terminal after the target satellite receives the test data; the channel error rate is a value for measuring the error code condition of channel transmission, and can be obtained by dividing the number of error codes by the total number of codes transmitted by a channel.
Specifically, in this embodiment, the second channel is set to be in an error code test mode, an earth terminal corresponding to the second channel is determined, and the earth terminal sends test data to the target satellite based on the second channel; after receiving the test data, the target satellite returns the test data to be processed to the earth terminal based on the second channel and the test data; and the earth terminal determines the channel error rate of the second channel based on the test data and the test data to be processed.
In a specific embodiment of the present application, taking a satellite B as an example, a signal vehicle corresponding to a second channel sends test data I to the satellite B corresponding to the second channel; the satellite B receives the test data I and returns the received test data I based on the second channel; the signal vehicle receives test data I1 to be processed returned by the satellite B; and determining the channel error rate of the second channel according to the test data I and the to-be-processed test data I1.
In practical applications, the method for calculating the channel error rate of the second channel according to the test data and the test data to be processed may include:
counting test data bit values of the test data and to-be-processed test data bit values of the to-be-processed test data;
and calculating the channel error rate of the second channel based on the test data bit value and the to-be-processed test data bit value.
The test data bit value refers to the data bit value of the test data, for example, if the test data is the data sequence "123456", the data bit value of the test data is 6; the to-be-processed test data bit value refers to the data bit number of the to-be-processed data, for example, if the to-be-processed test data is the data sequence "12345", the data bit value of the to-be-processed test data is 5; and after the test data bit value and the test data bit value to be processed are determined, determining whether the error code exists in the test data to be processed according to the difference value of the test data bit value and the test data bit value to be processed, and calculating the channel error rate of the second channel according to the error code quantity.
Specifically, the earth terminal counts the test data bit value of the test data and the to-be-processed test data bit value of the to-be-processed test data by starting a counter; under the condition that the numerical value of the test data bit is inconsistent with the numerical value of the test data bit to be processed, determining that an error code exists, recording the determined error code, and calculating the channel error rate of the second channel according to the uncoded number and the total transmitted code number; in practical application, the calculated channel error rate can be displayed at the earth terminal, so that technicians can conveniently check the channel error rate in a timing manner.
In a specific embodiment of the present application, taking test data T as an example, where the test data T is "1236789", the test data T is sent to a satellite B based on a second channel, to obtain test data T1 to be processed returned by the satellite B based on the second channel is "123678", a bit value 7 of T and a bit value 6 of T1 are obtained in a counter, and since the bit values are not consistent, it is determined that 1-bit error exists in T1, and a total number of transmitted data codes is 7, and a channel error rate of the second channel is obtained according to the total number of data codes 7 and the number of error codes 1 and is 0.14.
Acquiring the signal-to-noise ratio of the first channel in a modem processing the first channel service data, so as to facilitate the subsequent determination of the transmission quality of the first channel; and determining the channel error rate of the second channel based on the sending and receiving of the test data of the second channel, so that the subsequent determination of the channel transmission quality of the second channel is facilitated, and further, the service data transmitted by the first channel is switched to the second channel for transmission under the condition that the channel quality of the first channel does not meet the requirement.
Step 106: and generating a channel switching instruction under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold.
After the signal-to-noise ratio of the first channel and the channel error rate of the second channel are determined, whether the transmission quality of the first channel and the transmission quality of the second channel meet requirements or not is determined based on a preset signal-to-noise ratio threshold and a preset error rate threshold, wherein the preset signal-to-noise ratio threshold is a preset signal-to-noise ratio value, and the preset error rate threshold is a preset channel error rate; and generating a channel switching instruction, namely generating an instruction for switching a channel for transmitting the service data in real time under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold.
In practical applications, the preset signal-to-noise ratio threshold may be set based on actual requirements, and the present application is not particularly limited.
Preferably, in order to improve the reliability of the preset snr threshold, the preset snr threshold may be determined based on a data coding scheme of the channel and a data modulation scheme of the channel.
Specifically, before generating the channel switching instruction, the method further includes, when the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold:
and determining the preset signal-to-noise ratio threshold value based on the data modulation mode and the data coding mode of the first channel.
The data modulation scheme is a method of loading a signal to be transmitted to a high frequency signal, and for example, the data modulation scheme is bpsk (binary Phase Shift keying), qpsk (quadrature Phase Shift keying), or the like; the data encoding scheme is a coding scheme for performing error correction and error detection encoding on a digital signal in a channel, and examples thereof include 1/2 convolution, ldpc (low Density Parity Check code)1/2, and the like.
In an embodiment of the present application, the preset snr threshold may be determined based on a modulation scheme and a coding scheme of a channel, and the specific modulation scheme, the coding scheme, and a snr value (E)b/N0) The correspondence relationship of (a) is shown in the following table 1:
TABLE 1
Figure BDA0003470316560000121
Further, the above table 1 is explained by taking the modulation scheme BPSK as an example, and when the data modulation scheme of the radio channel is BPSK and the coding scheme is 1/2 convolution, E in table 1 can be usedb/N0The value 6.8 is set as a preset signal-to-noise ratio threshold, that is, the transmission quality of the wireless channel is satisfied when the signal-to-noise ratio of the wireless channel is greater than or equal to the preset signal-to-noise ratio threshold 6.8, and the transmission quality of the wireless channel is not satisfied when the signal-to-noise ratio of the wireless channel is less than the preset signal-to-noise ratio threshold 6.8.
In practical applications, the preset ber threshold may be set based on actual requirements for channel transmission quality, and the application is not limited specifically, for example, in an embodiment of the application, the preset ber threshold is 10E-7.
After the preset signal-to-noise ratio threshold is determined, comparing the signal-to-noise ratio of the first channel with the preset signal-to-noise ratio threshold, indicating that the data transmission quality of the first channel meets the requirement under the condition that the signal-to-noise ratio is greater than or equal to the preset signal-to-noise ratio threshold, namely continuously transmitting real-time service data through the first channel, and indicating that the data transmission quality of the first channel does not meet the requirement under the condition that the signal-to-noise ratio is less than the preset signal-to-noise ratio threshold, and transmitting the data transmitted in the first channel by switching the channel.
And after the preset error rate threshold value is determined, comparing the preset error rate threshold value with the channel error rate of the second channel, indicating that the data transmission quality of the second channel meets the requirement under the condition that the channel error rate is less than the preset error rate threshold value, and indicating that the data transmission quality of the second channel does not meet the requirement under the condition that the channel error rate is greater than or equal to the preset error rate threshold value.
In practical application, it may happen that the snr of the first channel is smaller than the preset snr threshold, and the channel error rate of the second channel is greater than or equal to the preset error rate threshold, that is, the data transmission quality of the first channel and the data transmission quality of the second channel do not meet the requirement, and at this time, a channel abnormality prompt needs to be sent, which specifically includes:
and generating a channel abnormal alarm under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is greater than or equal to a preset error rate threshold.
Specifically, when the signal-to-noise ratio of the first channel is judged to be smaller than a preset signal-to-noise ratio threshold value and the channel error rate of the second channel is judged to be larger than or equal to a preset error rate threshold value, a channel abnormity alarm is generated to prompt that the first channel and the second channel are unavailable.
By sending out the channel abnormal alarm under the condition that the first channel and the second channel are unavailable, the related technical personnel or the abnormal processing equipment can process the abnormal condition of the channel conveniently.
Step 108: and responding to the channel switching instruction, switching the first channel into an error code testing channel, and switching the second channel into a data transmission channel.
Under the condition that the data transmission quality of the first channel does not meet the requirement and the data transmission quality of the second channel meets the requirement, the channel for transmitting the service data in real time can be switched from the first channel to the second channel.
Specifically, the method for switching the first channel to the error code test channel and the second channel to the data transmission channel in response to the channel switching instruction includes:
determining a control parameter in the channel switching instruction, wherein the control parameter comprises a first channel mode identifier and a second channel identifier;
switching the first channel from a data transmission channel to an error code test channel based on the first channel mode identification;
and switching the second channel from an error code testing channel to a data transmission channel based on the second channel mode identification.
The channel switching instruction is an instruction for switching a channel for transmitting service data between the satellite and the earth terminal in real time; the control parameter is a parameter for controlling channel switching, and the control parameter includes a first channel mode identifier and a second channel identifier mode, where the first channel mode identifier is a mode parameter for identifying a first channel after a data processing mode is switched, and the second channel mode identifier is a mode parameter for identifying a second channel after a data processing mode is switched.
Specifically, a channel switching instruction is received, and a control parameter in the channel switching instruction is determined; determining that the data processing mode of the first channel after the channel is switched is an error code detection mode based on the first channel mode identifier in the control parameter, and determining that the data processing mode of the second channel after the channel is switched is a data transmission mode based on the second channel mode identifier in the control parameter; after the channel is switched, the service data between the satellite and the earth station is transmitted in real time through the second channel, and the error rate of the channel is detected through the second channel, namely the error rate of the second channel is monitored in real time.
In a specific embodiment of the present application, taking a satellite a and a satellite B as an example, a first channel for transmitting service data in real time is established between the satellite a and an earth station G, and a second channel for detecting a channel error rate is established between the satellite B and the earth station G; after the earth station A receives the channel switching instruction, the data transmission mode of the first channel is switched into the error code test mode based on the channel switching instruction, and the error code test mode of the second channel is modified into the data transmission mode.
The satellite channel selection method receives a channel test request, and determines a first channel and a second channel based on the channel test request, wherein the first channel is a data transmission channel, and the second channel is an error code test channel; determining a signal-to-noise ratio value of the first channel based on the service data received by the first channel, and determining a channel error rate of the second channel based on the test data sent by the second channel; generating a channel switching instruction under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold; and responding to the channel switching instruction, switching the first channel into an error code testing channel, and switching the second channel into a data transmission channel.
According to the satellite channel selection method in one embodiment of the application, channel quality tests are carried out on the first channel and the second channel, and switching is carried out between the first channel and the second channel, so that the reliability of satellite data transmission service is improved, and the problems of low data transmission quality, low efficiency and the like between a satellite and an earth terminal caused by interference of a wireless channel are solved.
The satellite channel selection method provided by the present application is further described below with reference to fig. 2 by taking the application of the satellite channel selection method in satellite a and satellite B as an example. Fig. 2 shows a processing flow chart of a satellite channel selection method applied to a satellite a and a satellite B according to an embodiment of the present application, which specifically includes the following steps:
step 202: a first channel between satellite a and the earth station and a second channel between satellite B and the earth station are established.
Specifically, as shown in fig. 3, fig. 3 is a schematic channel diagram provided in an embodiment of the present application, where the data routing device is disposed at an earth station, and is used for the earth station to receive service data sent by a satellite or send service data to the satellite, and the radio frequency link refers to a first channel and a second channel established between the satellite and the earth station.
Step 204: the data processing modes of the first channel and the second channel are initialized based on the channel test request.
Specifically, a channel test request is received, a first channel is set to be in a data transmission mode based on the channel test request, and real-time transmission of service data between the satellite A and the earth station is achieved based on the first channel; and setting the second channel into a channel test mode, and calculating the channel error rate of the second channel based on the test data sent by the second channel.
Step 206: and acquiring the signal-to-noise ratio of the first channel in a modem corresponding to the first channel, and acquiring the channel error rate of the second channel.
Specifically, a modem corresponding to the first channel is determined, and a signal-to-noise ratio value in the modem attribute information is obtained and is used as the signal-to-noise ratio value of the first channel; the earth station generates test data based on the channel test request and sends the test data to the satellite B based on a second channel; and the earth station receives the to-be-processed test data returned by the satellite B based on the test data, and determines the channel error rate of the second channel based on the test data and the to-be-processed test data.
Step 208: judging whether the signal-to-noise ratio of the first channel is greater than or equal to a preset signal-to-noise ratio threshold; if yes, go on to step 206; if not, go to step 210.
Specifically, a preset signal-to-noise ratio threshold is determined according to a modulation mode and a coding mode in the first channel, the signal-to-noise ratio is compared with the preset signal-to-noise ratio threshold, and if the signal-to-noise ratio is greater than or equal to the preset signal-to-noise ratio threshold, the data transmission quality of the first channel meets the requirement, the signal-to-noise ratio can be compared with the preset signal-to-noise ratio threshold again after the preset time threshold is 30 seconds until the quality of the received channel test is finished; in case the signal-to-noise ratio is smaller than the preset signal-to-noise ratio threshold, step 210 is executed.
Step 210: judging whether the channel error rate of the second channel is smaller than a preset error rate threshold value or not; if yes, go to step 212; if not, go to step 214.
Specifically, the channel error rate of the second channel is compared with a preset error rate threshold; if the channel error rate is less than the preset error rate threshold value, indicating that the data transmission quality of the second channel meets the requirement, continuing to execute step 212; if the channel error rate is greater than or equal to the preset error rate threshold, it indicates that the data transmission quality of the first channel and the second channel does not meet the requirement, then step 214 is executed.
Step 212: and switching the data processing mode of the first channel into an error code testing mode, and switching the data processing mode of the second channel into a data transmission mode.
Specifically, a data processing mode of a first channel and a data mode of a second channel are switched; after the data processing mode of the first channel is switched to the error code testing mode and the data processing mode of the second channel is switched to the data transmission mode, the error rate of the channel can be obtained based on the first channel, and the signal-to-noise ratio can be obtained based on the second channel.
Step 214: suggesting that dual channels are not available.
Specifically, a channel abnormal alarm is generated to prompt that the first channel and the second channel are unavailable.
The satellite channel selection method receives a channel test request, and determines a first channel and a second channel based on the channel test request, wherein the first channel is a data transmission channel, and the second channel is an error code test channel; determining a signal-to-noise ratio value of the first channel based on the service data received by the first channel, and determining a channel error rate of the second channel based on the test data sent by the second channel; generating a channel switching instruction under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold; and responding to the channel switching instruction, switching the first channel into an error code testing channel, and switching the second channel into a data transmission channel.
According to the satellite channel selection method in one embodiment of the application, the reliability of satellite data transmission service is improved through the added switching between the first channel and the second channel, and the problems of low data transmission quality, low efficiency and the like caused by interference of a wireless channel are solved.
The satellite channel selection method is further described below with reference to fig. 4. Fig. 4 shows a schematic diagram of an automatic routing device applied to a signal vehicle according to an embodiment of the present application, which is as follows:
in this embodiment, two data processing modules, two error code detection modules, and a switching control module are provided in the signal vehicle.
A first channel is established between the signal vehicle and the satellite A, and the data processing module and the error code detection module of the part A in the figure 4 are processing modules for processing data between the satellite A and the earth station; a second channel is established between the earth station and the satellite B, and the data processing module and the error code detection module in the part B in fig. 4 are processing modules for processing data between the satellite B and the earth station. And under the condition of receiving the channel test request, setting the first channel into a data transmission mode and setting the second channel into an error code test mode.
The earth station receives data D based on the first channel and inputs the data D to the data processing module. Specifically, data D is input into the data processing module in part a in fig. 4, the data processing module is configured to perform protocol conversion on the data D, and may perform data conversion on RJ45 or RS422 to obtain data recognizable by ethernet, the data processing module provides two RS422 output interfaces, one is connected to the switching module, and the other is connected to the error code detection module, and the error code detection module detects the quality of the satellite communication channel in real time and reports the result to the switching control module.
And transmitting the data D after protocol conversion to a switching control module, wherein the switching control module acquires an Eb/N0 value of a modem corresponding to a first channel in real time, and when the Eb/N0 value is lower than a set threshold and the error rate of a second channel is smaller than a preset error rate threshold, the switching control module issues control parameters to perform channel switching, and the first channel is set and switched to the second channel, namely, the second channel performs real-time transmission of service data. And simultaneously, the modem corresponding to the first channel is converted into an error code test mode to carry out error code rate test. And switching the modem of the second channel into a data transmission mode, and collecting the Eb/N0 value in the modem of the second channel in real time.
The code error detection module is mainly composed of a transmitting part and a receiving part, a transmitting end test code generator generates a known test digital sequence, namely test data, the test data is sent to an input end of a tested satellite communication channel, namely an input satellite B, after being coded and modulated by a modem, the test data is output after being transmitted by the tested satellite communication channel, and the test data is sent to the receiving part of the code error detection module for decoding after being demodulated by a receiving end modem. The test code generator of the receiving part generates a digital sequence which is the same as and synchronous with the transmitting part, the digital sequence is compared with the received digital sequence, namely the test data to be processed, the counter is started to count the bit number of the error code, if the bit number is inconsistent with the bit number, the error code is detected, the error code number is recorded, stored and analyzed, and the test result of the error code rate is displayed.
According to the satellite channel selection method, the data routing device is arranged at the earth terminal, the reliability of satellite communication service can be obviously improved, the system constructed based on the satellite and the data routing device is simple in composition, the data routing device is easy to establish by depending on the earth terminals such as the existing satellite earth station, and the data routing device is simple in structure, low in cost and easy to realize.
Corresponding to the above method embodiment, the present application further provides an embodiment of a satellite channel selection apparatus, and fig. 5 shows a schematic structural diagram of a satellite channel selection apparatus provided in an embodiment of the present application. As shown in fig. 5, the apparatus includes:
a receiving module 502, configured to receive a channel test request, and determine a first channel and a second channel based on the channel test request, where the first channel is a data transmission channel and the second channel is an error code test channel;
a determining module 504 configured to determine a signal-to-noise ratio value of the first channel based on traffic data received by the first channel, and determine a channel error rate of the second channel based on test data transmitted by the second channel;
a generating module 506 configured to generate a channel switching instruction when the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold;
a switching module 508 configured to switch the first channel to an error code test channel and the second channel to a data transmission channel in response to the channel switching instruction.
Optionally, the determining module 504 is further configured to:
determining a modem in the first channel that receives and processes traffic data;
obtaining, in the modem, a signal-to-noise ratio value for the first channel.
Optionally, the determining module 504 is further configured to:
transmitting test data to a target satellite based on the second channel;
receiving to-be-processed test data returned by the target satellite based on the test data;
and determining the channel error rate of the second channel according to the test data and the test data to be processed.
Optionally, the determining module 504 is further configured to:
counting test data bit values of the test data and to-be-processed test data bit values of the to-be-processed test data;
and calculating the channel error rate of the second channel based on the test data bit value and the to-be-processed test data bit value.
Optionally, the apparatus further comprises a determination submodule configured to:
and determining the preset signal-to-noise ratio threshold value based on the data modulation mode and the data coding mode of the first channel.
Optionally, the apparatus further comprises an alert module configured to:
and generating a channel abnormal alarm under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is greater than or equal to a preset error rate threshold.
Optionally, the apparatus further comprises a creating module configured to:
a channel creation request is received, and a first channel and a second channel are created based on the channel creation request.
Optionally, the switching module 508 is further configured to:
determining a control parameter in the channel switching instruction, wherein the control parameter comprises a first channel mode identifier and a second channel identifier;
switching the first channel from a data transmission channel to an error code test channel based on the first channel mode identification;
and switching the second channel from an error code testing channel to a data transmission channel based on the second channel mode identification.
The satellite channel selection device receives a channel test request through a receiving module, and determines a first channel and a second channel based on the channel test request, wherein the first channel is a data transmission channel, and the second channel is an error code test channel; the determining module is used for determining the signal-to-noise ratio of the first channel based on the service data received by the first channel and determining the channel error rate of the second channel based on the test data sent by the second channel; the generating module generates a channel switching instruction under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold; and the switching module responds to the channel switching instruction, switches the first channel into an error code testing channel and switches the second channel into a data transmission channel.
The satellite channel selection device realizes channel quality test on the first channel and the second channel and switching between the first channel and the second channel, improves the reliability of satellite data transmission service, and avoids the problems of low data transmission quality, low efficiency and the like between a satellite and an earth terminal caused by interference of a wireless channel
The foregoing is an exemplary scheme of a satellite channel selection apparatus according to this embodiment. It should be noted that the technical solution of the satellite channel selection apparatus and the technical solution of the satellite channel selection method belong to the same concept, and details of the technical solution of the satellite channel selection apparatus, which are not described in detail, can be referred to the description of the technical solution of the satellite channel selection method.
Fig. 6 illustrates a block diagram of a computing device 600 provided according to an embodiment of the present application. The components of the computing device 600 include, but are not limited to, a memory 610 and a processor 620. The processor 620 is coupled to the memory 610 via a bus 630 and a database 650 is used to store data.
Computing device 600 also includes access device 640, access device 640 enabling computing device 600 to communicate via one or more networks 660. Examples of such networks include the Public Switched Telephone Network (PSTN), a Local Area Network (LAN), a Wide Area Network (WAN), a Personal Area Network (PAN), or a combination of communication networks such as the internet. Access device 640 may include one or more of any type of network interface (e.g., a Network Interface Card (NIC)) whether wired or wireless, such as an IEEE802.11 Wireless Local Area Network (WLAN) wireless interface, a worldwide interoperability for microwave access (Wi-MAX) interface, an ethernet interface, a Universal Serial Bus (USB) interface, a cellular network interface, a bluetooth interface, a Near Field Communication (NFC) interface, and so forth.
In one embodiment of the present application, the above-described components of computing device 600, as well as other components not shown in FIG. 6, may also be connected to each other, such as by a bus. It should be understood that the block diagram of the computing device architecture shown in FIG. 6 is for purposes of example only and is not limiting as to the scope of the present application. Those skilled in the art may add or replace other components as desired.
Computing device 600 may be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (e.g., tablet, personal digital assistant, laptop, notebook, netbook, etc.), mobile phone (e.g., smartphone), wearable computing device (e.g., smartwatch, smartglasses, etc.), or other type of mobile device, or a stationary computing device such as a desktop computer or PC. Computing device 600 may also be a mobile or stationary server.
Wherein the steps of the satellite channel selection method are implemented by processor 620 when executing the computer instructions.
The above is an illustrative scheme of a computing device of the present embodiment. It should be noted that the technical solution of the computing device and the technical solution of the satellite channel selection method belong to the same concept, and details that are not described in detail in the technical solution of the computing device can be referred to the description of the technical solution of the satellite channel selection method.
An embodiment of the present application also provides a computer readable storage medium storing computer instructions, which when executed by a processor, implement the steps of the satellite channel selection method as described above.
The above is an illustrative scheme of a computer-readable storage medium of the present embodiment. It should be noted that the technical solution of the storage medium belongs to the same concept as the technical solution of the satellite channel selection method, and details that are not described in detail in the technical solution of the storage medium can be referred to the description of the technical solution of the satellite channel selection method.
The foregoing description of specific embodiments of the present application has been presented. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The computer instructions comprise computer program code which may be in the form of source code, object code, an executable file or some intermediate form, or the like. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
It should be noted that, for the sake of simplicity, the above-mentioned method embodiments are described as a series of acts or combinations, but those skilled in the art should understand that the present application is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The preferred embodiments of the present application disclosed above are intended only to aid in the explanation of the application. Alternative embodiments are not exhaustive and do not limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical applications, to thereby enable others skilled in the art to best understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims (10)

1. A method for satellite channel selection, comprising:
receiving a channel test request, and determining a first channel and a second channel based on the channel test request, wherein the first channel is a data transmission channel, and the second channel is an error code test channel;
determining a signal-to-noise ratio value of the first channel based on the service data received by the first channel, and determining a channel error rate of the second channel based on the test data sent by the second channel;
generating a channel switching instruction under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold;
and responding to the channel switching instruction, switching the first channel into an error code testing channel, and switching the second channel into a data transmission channel.
2. The satellite channel selection method of claim 1, wherein determining the signal-to-noise ratio value for the first channel based on traffic data received for the first channel comprises:
determining a modem in the first channel that receives and processes traffic data;
obtaining, in the modem, a signal-to-noise ratio value for the first channel.
3. The satellite channel selection method of claim 1, wherein determining the channel error rate for the second channel based on the test data transmitted by the second channel comprises:
transmitting test data to a target satellite based on the second channel;
receiving to-be-processed test data returned by the target satellite based on the test data;
and determining the channel error rate of the second channel according to the test data and the test data to be processed.
4. The satellite channel selection method of claim 3, wherein calculating the channel error rate for the second channel based on the test data and the test data to be processed comprises:
counting test data bit values of the test data and to-be-processed test data bit values of the to-be-processed test data;
and calculating the channel error rate of the second channel based on the test data bit value and the to-be-processed test data bit value.
5. The satellite channel selection method according to claim 1, wherein before generating the channel switching command in a case where the signal-to-noise ratio value is smaller than a preset signal-to-noise ratio threshold and the channel error rate is smaller than a preset error rate threshold, the method further comprises:
and determining the preset signal-to-noise ratio threshold value based on the data modulation mode and the data coding mode of the first channel.
6. The satellite channel selection method of claim 1, wherein the method further comprises:
and generating a channel abnormal alarm under the condition that the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold and the channel error rate is greater than or equal to a preset error rate threshold.
7. The satellite channel selection method of claim 1, wherein switching the first channel to an error code test channel and switching the second channel to a data transmission channel in response to the channel switching instruction comprises:
determining a control parameter in the channel switching instruction, wherein the control parameter comprises a first channel mode identifier and a second channel identifier;
switching the first channel from a data transmission channel to an error code test channel based on the first channel mode identification;
and switching the second channel from an error code testing channel to a data transmission channel based on the second channel mode identification.
8. A satellite channel selection apparatus, comprising:
the device comprises a receiving module, a sending module and a receiving module, wherein the receiving module is configured to receive a channel test request and determine a first channel and a second channel based on the channel test request, the first channel is a data transmission channel, and the second channel is an error code test channel;
a determining module configured to determine a signal-to-noise ratio value of the first channel based on traffic data received by the first channel, and determine a channel error rate of the second channel based on test data transmitted by the second channel;
the generating module is configured to generate a channel switching instruction under the condition that the signal-to-noise ratio value is smaller than a preset signal-to-noise ratio threshold value and the channel error rate is smaller than a preset error rate threshold value;
and the switching module is configured to respond to the channel switching instruction, switch the first channel into an error code testing channel and switch the second channel into a data transmission channel.
9. A computing device comprising a memory, a processor, and computer instructions stored on the memory and executable on the processor, wherein the processor implements the steps of the method of any one of claims 1-7 when executing the computer instructions.
10. A computer-readable storage medium storing computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 1 to 7.
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