CN114095056B - Data transmission method, device, equipment and storage medium - Google Patents
Data transmission method, device, equipment and storage medium Download PDFInfo
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- CN114095056B CN114095056B CN202111299690.1A CN202111299690A CN114095056B CN 114095056 B CN114095056 B CN 114095056B CN 202111299690 A CN202111299690 A CN 202111299690A CN 114095056 B CN114095056 B CN 114095056B
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- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to a data transmission method, a device, equipment and a storage medium, which are characterized in that each signal to be transmitted is received, the number of the signals to be transmitted is determined, the maximum bandwidth of each signal to be transmitted is determined according to the number of the signals to be transmitted, then the spread spectrum code sequence of the signals to be transmitted is determined according to the maximum bandwidth, spread spectrum processing is carried out on the signals to be transmitted according to the spread spectrum code sequence to obtain spread spectrum signals, and finally the spread spectrum signals are transmitted to a master station.
Description
Technical Field
The present invention relates to the field of power system monitoring technologies, and in particular, to a data transmission method, apparatus, device, and storage medium.
Background
The power system is a system related to power generation, transmission, transformation and distribution, and in order to ensure safe operation of the power system, a plurality of sensors are arranged in the power system to detect devices and lines, and the sensors are transmitted to a main station to alarm when abnormality of the devices or lines is detected.
However, during signal transmission, noise interference may exist, which may cause erroneous judgment on the working condition of the device and the conduction condition of the line, and affect the safe operation of the power system. In order to improve the anti-interference capability of the original signal, the original signal is usually spread and transmitted, i.e. the original signal is modulated to form a digital signal, then the spread spectrum code sequence generated by the spread spectrum code generator modulates the digital signal to broaden the frequency spectrum of the signal, and the broadened signal is modulated to a radio frequency for transmission. The broadband radio frequency signal received at the receiving end of the main station is converted to intermediate frequency, then the local generated spread spectrum code sequence which is the same as the transmitting end is de-correlated and de-spread, and the information is demodulated and restored into the original information output. However, the change of bandwidth also affects the number of signals that can be transmitted, so that the number of data transmitted in the same time is reduced, and thus a method for balancing the number of signals transmitted and the interference rejection capability during the signal transmission is urgently needed.
Disclosure of Invention
Based on this, it is necessary to provide a data transmission method capable of balancing the transmission number of signals and the interference resistance in the signal transmission process.
A data transmission method, comprising:
receiving each signal to be transmitted;
determining the number of signals to be transmitted, and determining the maximum bandwidth of each signal to be transmitted according to the number of signals to be transmitted;
determining a spread spectrum code sequence of the signal to be transmitted according to the maximum bandwidth, and performing spread spectrum processing on the signal to be transmitted according to the spread spectrum code sequence to obtain a spread spectrum signal;
transmitting the spread spectrum signal to the primary station.
In one embodiment, said transmitting said spread spectrum signal to said primary station comprises:
determining a transmission channel of the signal to be transmitted according to the signal to be transmitted;
and transmitting the spread spectrum signal to the main station through the transmission channel.
In one embodiment, the signal to be sent carries a sensor identifier, and the determining, according to the signal to be sent, a transmission channel of the signal to be sent includes:
determining the transmission level of the signal to be transmitted according to the sensor identifier;
and determining the transmission channel according to the transmission level.
In one embodiment, the transmission channel includes a high-speed channel and a general channel, the transmission level includes a priority and a normal level, and determining the transmission channel according to the transmission level includes:
if the transmission level is priority, the high-speed channel is used as the transmission channel;
and if the transmission level is a conventional level, the general channel is used as the transmission channel, wherein the transmission rate of the high-speed channel is higher than that of the general channel.
In one embodiment, the method further comprises:
despreading the spread spectrum signal to obtain a despread signal;
determining a signal-to-noise ratio of the spread spectrum signal according to the spread spectrum signal and the despread signal;
and if the signal-to-noise ratio is lower than a preset signal-to-noise ratio threshold, outputting an alarm signal.
In one embodiment, the determining the signal-to-noise ratio of the spread spectrum signal from the spread spectrum signal and the despread signal comprises:
acquiring a first power of the spread spectrum signal and a second power of the despread signal;
acquiring a difference value between the first power and the second power;
and acquiring the signal to noise ratio according to the difference value and the second power.
In one embodiment, the determining the spreading code sequence of the signal to be transmitted according to the maximum bandwidth includes:
determining the spreading factor of the signal to be transmitted according to the maximum bandwidth;
the spreading code sequence is generated according to the spreading factor.
A data transmission apparatus, the apparatus comprising:
the receiving module is used for receiving each signal to be transmitted;
the bandwidth determining module is used for determining the number of signals to be transmitted and determining the maximum bandwidth of each signal to be transmitted according to the number of signals to be transmitted;
the spread spectrum module is used for determining a spread spectrum code sequence of the signal to be transmitted according to the maximum bandwidth and performing spread spectrum processing on the signal to be transmitted according to the spread spectrum code sequence to obtain a spread spectrum signal;
and the transmitting module is used for transmitting the spread spectrum signal to the master station.
A data transmission device comprising a memory storing a computer program and a processor implementing the steps of the method described above when the processor executes the computer program.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.
According to the data transmission method, the number of signals to be transmitted is determined, the maximum bandwidth of each signal to be transmitted is determined according to the number of signals to be transmitted, the spread spectrum code sequence of the signals to be transmitted is determined according to the maximum bandwidth, spread spectrum processing is carried out on the signals to be transmitted according to the spread spectrum code sequence to obtain spread spectrum signals, and finally the spread spectrum signals are transmitted to the master station.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a flow chart of a data transmission method according to an embodiment;
FIG. 2 is a flow chart of a data transmission method according to another embodiment;
FIG. 3 is a flow chart of a data transmission method according to another embodiment;
FIG. 4 is a flow chart of a data transmission method according to another embodiment;
fig. 5 is a flowchart of a data transmission method according to another embodiment.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. Both the first resistor and the second resistor are resistors, but they are not the same resistor.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, the term "and/or" as used in this specification includes any and all combinations of the associated listed items.
Fig. 1 is a flow chart of a data transmission method according to an embodiment, as shown in fig. 1, the data transmission method includes steps S110 to S140.
Step S110, each signal to be transmitted is received.
The signal to be sent can be signals collected by sensors for detecting devices and circuits in the power system, the number of the signals can be multiple, each sensor can judge whether the devices or the circuits are abnormal according to the signals collected by the sensors, and the signals are output when the abnormality is judged, so that the received signal to be sent is the signal of the abnormal device or circuit, and the data transmission pressure is reduced.
Step S120, the number of signals to be transmitted is determined, and the maximum bandwidth of each signal to be transmitted is determined according to the number of signals to be transmitted.
It can be understood that when the number of signals to be transmitted is large, in order to ensure that each signal to be transmitted can be transmitted to the master station, the bandwidth needs to be reduced, and the maximum bandwidth is the maximum bandwidth corresponding to the time when each signal to be transmitted can be transmitted to the master station through the transmission channel, so that the corresponding relationship between the number of signals to be transmitted and the maximum bandwidth can be established according to the historical transmission data, and the corresponding maximum bandwidth is obtained after the number of signals to be transmitted is determined.
Step S130, a spreading code sequence of the signal to be transmitted is determined according to the maximum bandwidth, and the signal to be transmitted is spread according to the spreading code sequence to obtain a spread signal.
It is understood that the maximum bandwidth may correspond to the spreading code sequences one by one, and the bandwidth of the spread signal obtained by the spreading process of the spreading code sequences does not exceed the maximum bandwidth.
Step S140, the signal to be transmitted after the spread spectrum processing is sent to the master station.
In the embodiment of the invention, when the spread spectrum processing is carried out on the signals to be transmitted, the maximum bandwidth of each signal to be transmitted is determined according to the number of the signals to be transmitted, so that the spread spectrum code sequence is determined to carry out the spread spectrum processing, the transmission number of the signals to be transmitted is ensured, and meanwhile, the anti-interference capability of the signals to be transmitted is improved due to the adoption of spread spectrum transmission, and the balance between the transmission number of the signals and the anti-interference capability is realized.
In one embodiment, the step of transmitting the spread spectrum signal to the primary station comprises step S241 and step S242, as shown in figure 2.
Step S241, determining a transmission channel of the spread spectrum signal according to the signal to be transmitted.
It can be understood that the transmission channels may include a plurality of transmission channels, and a corresponding relationship between each signal to be transmitted and each transmission channel may be established first, so that when data transmission is performed, a spread spectrum signal corresponding to the signal to be transmitted is transmitted by adopting the corresponding transmission channel according to the signal to be transmitted. The spread spectrum signal corresponding to the signal to be transmitted is a spread spectrum signal obtained after the signal to be transmitted is spread spectrum processed.
Step S242, the spread spectrum signal is transmitted to the master station through the transmission channel.
It can be appreciated that by adopting a plurality of transmission channels to perform data transmission on the spread spectrum signal, the data transmission pressure can be reduced, and the transmission speed can be increased, thereby ensuring that data can be transmitted to the master station.
In one embodiment, the step of determining the transmission channel of the spread spectrum signal according to the signal to be transmitted, which carries the sensor identifier, includes steps S3411 to S3412, as shown in fig. 3.
In step S3411, a transmission level of the spread spectrum signal is determined according to the sensor identifier.
It can be understood that the signal to be transmitted carries a sensor identifier, and the corresponding relationship between each signal to be transmitted and each transmission channel, that is, the corresponding relationship between each sensor identifier and each transmission channel, identifies the sensor identifier of the signal to be transmitted corresponding to the spread spectrum signal when the spread spectrum signal is transmitted to the master station, and then determines the transmission level of the spread spectrum signal according to the sensor identifier.
In step S3412, a transmission channel is determined according to the transmission level.
The transmission level of the spread spectrum signals can comprise multiple levels, so that each spread spectrum signal is classified and then transmitted by a channel. The transmission modes of the signals are enriched, so that different transmission channels can be selected according to the specific conditions of the spread spectrum signals, for example, two spread spectrum signals with mutual interference can be subjected to channel division transmission, and the signal to noise ratio of the signals is improved.
In one embodiment, the transmission channels may include a high-speed channel and a general channel, the transmission level may include a priority and a normal level, and determining the transmission channel according to the transmission level may include step S3413 and step S3414, as shown in fig. 4.
In step S3413, if the transmission level is the priority, the high-speed channel is used as the transmission channel.
It can be understood that according to the sensor identifier carried by the signal to be sent, it can be determined which device or circuit the signal to be sent belongs to, the signal to be sent corresponding to the device or circuit which is important to the overall operation of the power system in the power system can be set as priority, according to the sensor identifier of the signal to be sent, whether the transmission level of the signal to be sent is priority or normal level can be determined, if the signal to be sent is priority, the spread spectrum signal corresponding to the signal to be sent can be transmitted by a high-speed channel.
In step S3414, if the transmission level is the normal level, the common channel is used as the transmission channel, wherein the transmission rate of the high-speed channel is higher than the transmission rate of the common channel.
It can be understood that when the transmission level of the signal to be transmitted is determined according to the sensor identifier of the signal to be transmitted, if the transmission level is a normal level, the spread spectrum signal corresponding to the signal to be transmitted can be transmitted by a general channel. The transmission rate of the high-speed channel is higher than that of the general channel, so that the high-speed transmission of key devices and circuits in the power system can be realized, and the timeliness of key fault information is improved.
However, fig. 4 is not intended to specify the execution sequence of step S3413 and step S3414, and in practice, step S3413 and step S3414 may be executed simultaneously without specifying the execution sequence.
In one embodiment, the data transmission method further includes steps S243 to S245, as shown in fig. 5.
Step S243, despread the spread spectrum signal to obtain a despread signal.
It will be appreciated that, in order to recover the original signal, the primary station may despread the spread spectrum signal after receiving the spread spectrum signal, and in particular may despread the spread spectrum signal in accordance with the spreading code sequence.
Step S244, determining the signal-to-noise ratio of the spread spectrum signal according to the spread spectrum signal and the despread signal.
Step S245, if the signal to noise ratio is lower than the preset signal to noise ratio threshold, an alarm signal is output.
It will be appreciated that if the snr is less than the predetermined snr threshold, it is indicated that it is not satisfactory for communication, and an alarm signal may be output to prompt the operator. When the signal-to-noise ratio is smaller than a preset signal-to-noise ratio threshold, the communication system for transmitting the spread spectrum signal can be adjusted, for example, a base station is reselected, and the signal-to-noise ratio corresponding to the spread spectrum signal is improved, so that the signal quality is improved; or adjusting the transmitting power of the base station corresponding to the spread spectrum signal, such as increasing the transmitting power, so as to improve the signal to noise ratio, thereby improving the communication quality.
Wherein the preset signal to noise ratio threshold may be determined based on historical empirical values, and may be specifically equal to 20Lg (second power history value/maximum noise limit).
The maximum noise limit may be set manually, and may be determined in particular based on the degree of noise reduction of the despread signal by the master station and/or the noise tolerance of the master station. The master station can adopt different noise reduction processing methods for different despread signals, so that each despread signal corresponds to a maximum noise limit value. The noise reduction degree of the main station on the despread signal is related to a device or algorithm for performing noise reduction processing on the despread signal by the main station, and can be a power value of noise to be removed, and can be specifically determined according to a historical experience value; in addition, in order to avoid abnormal operation of the master station, a noise tolerance degree can be set artificially according to the operation characteristic of the master station, the noise tolerance degree of the master station can be the power value of the maximum noise which can be born by the master station, and the power value can be determined according to an empirical value. The maximum noise limit value can be determined only according to the noise reduction degree, and specifically can be the power value of the noise to be removed; the maximum noise limit value can also be determined only according to the noise tolerance degree of the main station, and can be specifically the power value of the maximum noise which can be born by the main station; the maximum noise limit value may also be determined according to the noise reduction degree of the main station on the despread signal and the noise tolerance degree of the main station, and may specifically be the smaller one of the power value of the noise to be removed and the power value of the maximum noise that can be borne by the main station.
In one embodiment, determining the signal-to-noise ratio of the spread spectrum signal from the spread spectrum signal and the despread signal includes obtaining a first power of the spread spectrum signal and a second power of the despread signal, then obtaining a difference between the first power and the second power, and then obtaining the signal-to-noise ratio from the difference and the second power.
It will be appreciated that the spread and despread signals may each comprise a plurality of samples having a particular amplitude, and that the power may each be an average of the square of the sample amplitude modes. The difference between the first power and the second power is the noise power, and the ratio of the second power to the noise power is the signal-to-noise ratio.
In one embodiment, determining the spreading code sequence of the signal to be transmitted from the maximum bandwidth may include determining a spreading factor of the signal to be transmitted from the maximum bandwidth and then generating the spreading code sequence from the spreading factor.
It will be appreciated that when spreading, each bit of the signal is multiplied by a spreading factor, for example, there is a 1bit to be transmitted, when the spreading factor is 1, data 1 is represented by a 1 when transmitting, and when the spreading factor is 6 (there are 6 bits), data is 111111 when transmitting, this 111111 is used to represent 1, so that each bit multiplied by the data is represented by a 6 bit, that is, the total data amount needs to be transmitted is increased by 6 times. The Spreading Factor (SF) is a sequence number of a spreading sequence, which indicates how many bits (chips) are used to represent one information symbol, and a common spreading sequence may include an M sequence, a GOLD sequence, a WALSH function sequence, and the like.
The embodiment of the invention also provides a data transmission device, which comprises a receiving module, a bandwidth determining module, a spread spectrum module and a sending module. The receiving module is used for receiving each signal to be transmitted; the bandwidth determining module is used for determining the number of signals to be transmitted and determining the maximum bandwidth of each signal to be transmitted according to the number of signals to be transmitted; the spread spectrum module is used for determining a spread spectrum code sequence of a signal to be transmitted according to the maximum bandwidth, and performing spread spectrum processing on the signal to be transmitted according to the spread spectrum code sequence to obtain a spread spectrum signal; the transmitting module is used for transmitting the spread spectrum signal to the master station.
It can be understood that when the number of signals to be transmitted is large, in order to ensure that each signal to be transmitted can be transmitted to the master station, the bandwidth needs to be reduced, and the maximum bandwidth is the maximum bandwidth corresponding to the time when each signal to be transmitted can be transmitted to the master station through the transmission channel, so that the corresponding relationship between the number of signals to be transmitted and the maximum bandwidth can be established according to the historical transmission data, and the corresponding maximum bandwidth is obtained after the number of signals to be transmitted is determined.
In one embodiment, the sending module is further configured to determine a transmission channel of the spread spectrum signal according to the signal to be sent; and transmits the spread spectrum signal to the primary station via the transmission channel.
It can be understood that the transmission channels may include a plurality of transmission channels, and a corresponding relationship between each signal to be transmitted and each transmission channel may be established first, so that when data transmission is performed, a spread spectrum signal corresponding to the signal to be transmitted is transmitted by adopting the corresponding transmission channel according to the signal to be transmitted. The spread spectrum signal corresponding to the signal to be transmitted is a spread spectrum signal obtained after the signal to be transmitted is spread spectrum processed.
In one embodiment, the signal to be sent carries a sensor identifier, and the sending module is further configured to determine a transmission level of the spread spectrum signal according to the sensor identifier, and determine a transmission channel according to the transmission level.
In one embodiment, the transmission channel includes a high-speed channel and a general channel, the transmission level includes a priority and a normal level, and the sending module is further configured to use the high-speed channel as the transmission channel if the transmission level is the priority; if the transmission level is the conventional level, the general channel is used as the transmission channel, wherein the transmission rate of the high-speed channel is higher than that of the general channel.
In one embodiment, the data transmission device further includes a despreading module, a signal-to-noise ratio confirmation module, and an alarm module, where the despreading module is configured to despread the spread spectrum signal to obtain a despread signal; the signal-to-noise ratio confirming module is used for confirming the signal-to-noise ratio of the spread spectrum signal according to the spread spectrum signal and the despread signal; and if the signal-to-noise ratio is lower than a preset signal-to-noise ratio threshold, outputting an alarm signal.
In one embodiment, the snr confirmation module is further configured to obtain a first power of the spread spectrum signal and a second power of the despread signal, then obtain a difference between the first power and the second power, and obtain the snr according to the difference and the second power.
In one embodiment, the spreading module is further configured to determine a spreading factor of the signal to be transmitted according to the maximum bandwidth, and then generate a spreading code sequence according to the spreading factor.
The embodiment of the invention also provides a data transmission device, which comprises a memory and a processor, wherein the memory stores a computer program, and the data transmission device is characterized in that the steps of any method embodiment are realized when the processor executes the computer program.
The present invention also provides a computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed by a processor implements the steps of any of the method embodiments described above.
In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "desired embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A data transmission method, comprising:
receiving each signal to be transmitted; the signal to be sent is a signal which is acquired by a sensor for detecting each device and each circuit and is output when the sensor is judged to be abnormal, and the signal to be sent carries a sensor identifier;
determining the number of signals to be transmitted, and determining the maximum bandwidth of each signal to be transmitted according to the number of signals to be transmitted; a corresponding relation is established between the number of the signals to be transmitted and the maximum bandwidth; the maximum bandwidth has a one-to-one correspondence with the spreading code sequence;
determining a spread spectrum code sequence of the signal to be transmitted according to the maximum bandwidth, and performing spread spectrum processing on the signal to be transmitted according to the spread spectrum code sequence to obtain a spread spectrum signal;
determining the transmission level of the spread spectrum signal according to the sensor identification; the transmission level includes a priority and a regular level;
if the transmission level is priority, a high-speed channel is used as a transmission channel;
if the transmission level is a conventional level, a general channel is used as the transmission channel, wherein the transmission rate of the high-speed channel is higher than that of the general channel;
and transmitting the spread spectrum signal to a main station through the transmission channel.
2. The data transmission method according to claim 1, characterized in that the method further comprises:
despreading the spread spectrum signal to obtain a despread signal;
determining a signal-to-noise ratio of the spread spectrum signal according to the spread spectrum signal and the despread signal;
and if the signal-to-noise ratio is lower than a preset signal-to-noise ratio threshold, outputting an alarm signal.
3. The method of data transmission according to claim 2, wherein said determining a signal-to-noise ratio of the spread spectrum signal from the spread spectrum signal and the despread signal comprises:
acquiring a first power of the spread spectrum signal and a second power of the despread signal;
acquiring a difference value between the first power and the second power;
and acquiring the signal to noise ratio according to the difference value and the second power.
4. The data transmission method according to claim 1, wherein the determining the spreading code sequence of the signal to be transmitted according to the maximum bandwidth comprises:
determining the spreading factor of the signal to be transmitted according to the maximum bandwidth;
the spreading code sequence is generated according to the spreading factor.
5. A data transmission apparatus, the apparatus comprising:
the receiving module is used for receiving each signal to be transmitted; the signal to be sent is a signal which is acquired by a sensor for detecting each device and each circuit and is output when the sensor is judged to be abnormal, and the signal to be sent carries a sensor identifier;
the bandwidth determining module is used for determining the number of signals to be transmitted and determining the maximum bandwidth of each signal to be transmitted according to the number of signals to be transmitted; a corresponding relation is established between the number of the signals to be transmitted and the maximum bandwidth; the maximum bandwidth has a one-to-one correspondence with the spreading code sequence;
the spread spectrum module is used for determining a spread spectrum code sequence of the signal to be transmitted according to the maximum bandwidth and performing spread spectrum processing on the signal to be transmitted according to the spread spectrum code sequence to obtain a spread spectrum signal;
a transmitting module, configured to determine a transmission level of the spread spectrum signal according to the sensor identifier; the transmission level includes a priority and a regular level; if the transmission level is priority, a high-speed channel is used as a transmission channel; if the transmission level is a conventional level, a general channel is used as the transmission channel, wherein the transmission rate of the high-speed channel is higher than that of the general channel; and transmitting the spread spectrum signal to a main station through the transmission channel.
6. The data transmission apparatus according to claim 5, further comprising a despreading module, a signal-to-noise ratio confirming module, and an alarm module, wherein the despreading module is configured to despread the spread spectrum signal to obtain a despread signal; the signal-to-noise ratio confirming module is used for confirming the signal-to-noise ratio of the spread spectrum signal according to the spread spectrum signal and the despread signal; and the alarm module is used for outputting an alarm signal if the signal to noise ratio is lower than a preset signal to noise ratio threshold value.
7. The data transmission apparatus of claim 6, wherein the signal-to-noise ratio confirmation module is further configured to: acquiring a first power of the spread spectrum signal and a second power of the despread signal; acquiring a difference value between the first power and the second power; and acquiring the signal to noise ratio according to the difference value and the second power.
8. The data transmission apparatus of claim 6, wherein the spreading module is further configured to: determining the spreading factor of the signal to be transmitted according to the maximum bandwidth; the spreading code sequence is generated according to the spreading factor.
9. A data transmission device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 4 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 4.
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