CN111490850A - Communication device data transmission control method, system, device and storage medium - Google Patents
Communication device data transmission control method, system, device and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a data transmission control method of communication equipment, which comprises the following steps: when the data transmission of the communication equipment fails, carrying out spectrum processing on the communication equipment; performing data transmission by using the processed frequency spectrum; wherein the spectrum processing comprises at least one of the following modes: moving the frequency spectrum according to a preset offset value and a preset offset direction; splitting the frequency spectrum and copying data according to a preset copy multiple so as to split the frequency spectrum into a plurality of sub-channels; grouping the frequency spectrum according to a preset grouping number so as to divide the frequency spectrum into a plurality of groups of subcarriers; channels in the spectrum are adapted to include narrow channels for transmitting data and redundant channels for data checksum error correction. The invention also discloses a data transmission control system and device of the communication device and a computer storage medium. The embodiment of the invention is suitable for wireless local area network communication in a strong interference environment, can effectively improve the anti-interference capability of communication equipment, and improves the product use experience of users.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to a method, a system, a device, and a storage medium for controlling data transmission of a communication device.
Background
For wlan communication, radio interference is ubiquitous due to tight radio resource usage. Under the strong interference environment, the transmission data of the sender is lost (the receiver cannot receive the transmission data), or the loss probability of the response information of the receiver (the sender) is obviously increased in the transmission process. As long as there is a loss in the transmission data of the sender and the response information of the receiver, the data message must be retransmitted. When external interference is strong, data retransmission cannot be successful for many times, and the retransmission times reach retransmission limit, a sender can actively reduce the transmission rate or reduce the spectrum bandwidth for data transmission, and the data transmission consumes longer time in the retransmission and speed regulation processes, so that the data transmission efficiency is greatly reduced under the strong interference.
The existing anti-interference method mainly comprises two aspects of hardware and software: one is a hardware method, which adds a filter circuit on the circuit to filter out the interference outside the working frequency band; the other is a software method, which improves the anti-interference capability through a noise suppression technology or a control subcarrier power distribution mode and the like. However, the method of adding filters to hardware is high in implementation cost, the method needs to add filters with high rectangular coefficients for different channels, and is difficult to implement for a multi-channel 5g frequency band, and the method cannot filter co-channel interference; by means of spectrum replication, spectrum data under a high bandwidth is replicated into a plurality of spectrum data with the same narrow bandwidth, wireless performance under a weak interference environment is also affected, and if a specific error correction mechanism is not added, the data packet loss rate cannot be effectively improved only by means of spectrum replication.
Disclosure of Invention
The embodiment of the invention aims to provide a data transmission control method, a data transmission control system, a data transmission control device and a storage medium of communication equipment, which are suitable for wireless local area network communication in a strong interference environment, can effectively improve the anti-interference capability of the communication equipment and improve the product use experience of users.
In order to achieve the above object, an embodiment of the present invention provides a method for controlling data transmission of a communication device, including:
when the data transmission of the communication equipment fails, carrying out spectrum processing on the communication equipment;
performing data transmission by using the processed frequency spectrum;
the spectrum processing comprises at least one of the following four modes:
moving the frequency spectrum according to a preset offset value and a preset offset direction;
splitting a frequency spectrum and copying data according to a preset copy multiple so as to split the frequency spectrum into a plurality of sub-channels;
grouping a frequency spectrum according to a preset grouping number so as to divide the frequency spectrum into a plurality of groups of subcarriers;
channels in the spectrum are adapted to include narrow channels for transmitting data and redundant channels for data checksum error correction.
Compared with the prior art, the data transmission control method of the communication equipment disclosed by the invention comprises the following steps of firstly, carrying out spectrum processing on the communication equipment when the data transmission of the communication equipment fails; and then, carrying out data transmission in the processed frequency spectrum. The embodiment of the invention uses the frequency spectrum moving, frequency spectrum copying, subcarrier copying and redundant channels for the combination mechanism of data check and error correction, and can effectively improve the success rate of data transmission. The wireless local area network communication method and device are suitable for wireless local area network communication in a strong interference environment, the anti-interference capability of communication equipment can be effectively improved, and the product use experience of users is improved.
As an improvement of the above scheme, when data transmission fails after performing spectrum splitting, the method further includes:
adjusting the copy multiple; wherein the adjusted copy multiple is greater than the copy multiple before adjustment;
and performing re-splitting and data copying on the frequency spectrum according to the adjusted copy multiple so as to split the frequency spectrum into a plurality of sub-channels.
As an improvement of the above scheme, the grouped subcarriers include data subcarriers for transmitting data and pilot frame subcarriers for synchronizing data.
As an improvement of the above scheme, when data transmission fails after the spectrum grouping, the method further includes:
adjusting the number of packets; wherein the number of the adjusted packets is greater than the number of the packets before the adjustment;
the spectrum is regrouped according to the adjusted number of packets to divide the spectrum into groups of subcarriers.
As an improvement of the above scheme, when the spectrum processing includes four ways, the performing spectrum processing on the communication device to perform data transmission in a processed spectrum specifically includes:
when the data transmission of the communication equipment fails, the frequency spectrum is moved according to a preset offset value and a preset offset direction, and the data transmission is carried out according to the currently moved frequency spectrum;
when the data transmission fails after the spectrum moving, splitting and copying the moved spectrum according to a preset copy multiple so as to split the spectrum into a plurality of sub-channels, and transmitting data by using the current sub-channel;
when the data transmission fails after the channel splitting is finished, grouping the carriers in the sub-channels according to a preset grouping number so as to divide the frequency spectrum into a plurality of groups of sub-carriers, and performing data transmission by using the currently grouped sub-carriers;
when the data transmission fails after the carrier grouping is finished, the channel after the frequency spectrum shifting is adjusted to comprise a narrow channel for transmitting data and a redundant channel for data checking and error correction, and the data transmission is carried out by using the current narrow channel.
In order to achieve the above object, an embodiment of the present invention further provides a data transmission control system for a communication device, including:
the frequency spectrum processing module is used for carrying out frequency spectrum processing on the communication equipment when the data transmission of the communication equipment fails;
the data transmission module is used for transmitting data by the processed frequency spectrum;
wherein the spectrum processing module comprises at least one of the following units:
the frequency spectrum moving unit is used for moving the frequency spectrum according to a preset offset value and a preset offset direction;
the spectrum replication unit is used for splitting a spectrum and replicating data according to a preset replication multiple so as to split the spectrum into a plurality of sub-channels;
the system comprises a spectrum grouping unit, a spectrum grouping unit and a spectrum processing unit, wherein the spectrum grouping unit is used for grouping a spectrum according to a preset grouping number so as to divide the spectrum into a plurality of groups of subcarriers;
and a spectrum adjusting unit for adjusting channels in the spectrum to include a narrow channel for transmitting data and a redundant channel for data check and error correction.
Compared with the prior art, the communication equipment data transmission control system disclosed by the invention has the advantages that firstly, when the data transmission of the communication equipment fails, the frequency spectrum processing module carries out frequency spectrum processing on the communication equipment; and then, the data transmission module performs data transmission in the processed frequency spectrum. The embodiment of the invention uses the frequency spectrum moving, frequency spectrum copying, subcarrier copying and redundant channels for the combination mechanism of data check and error correction, and can effectively improve the success rate of data transmission. The wireless local area network communication method and device are suitable for wireless local area network communication in a strong interference environment, the anti-interference capability of communication equipment can be effectively improved, and the product use experience of users is improved.
As an improvement of the above, the spectrum replication unit is further configured to:
when the data transmission fails after the spectrum splitting is finished, adjusting the copy multiple; wherein the adjusted copy multiple is greater than the copy multiple before adjustment;
and performing re-splitting and data copying on the frequency spectrum according to the adjusted copy multiple so as to split the frequency spectrum into a plurality of sub-channels.
As an improvement of the above scheme, the spectrum grouping unit is further configured to:
when the data transmission fails after the spectrum grouping is finished, adjusting the grouping number; wherein the number of the adjusted packets is greater than the number of the packets before the adjustment;
the spectrum is regrouped according to the adjusted number of packets to divide the spectrum into groups of subcarriers.
In order to achieve the above object, an embodiment of the present invention further discloses a data transmission control device for a communication device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the data transmission control method for the communication device according to any of the above embodiments is implemented.
In order to achieve the above object, an embodiment of the present invention further discloses a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, and when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to execute the method for controlling data transmission of a communication apparatus according to any of the above embodiments.
Drawings
Fig. 1 is a flowchart of a data transmission control method of a communication device according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating shifting a spectrum to the left according to an embodiment of the present invention;
fig. 3 is a schematic diagram of channel splitting provided by an embodiment of the present invention;
fig. 4 is a flow chart of spectrum replication provided by an embodiment of the present invention;
fig. 5 is a schematic diagram of channel data multiplexing and redundant channel checksum error correction provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of a redundant channel checksum error correction provided by an embodiment of the present invention;
FIG. 7 is a flow chart of data verification and error correction adjustment provided by an embodiment of the present invention;
fig. 8 is a flowchart of another data transmission control method of a communication device according to an embodiment of the present invention;
fig. 9 is a block diagram of a data transmission control system of a communication device according to an embodiment of the present invention;
fig. 10 is a block diagram of a data transmission control device of a communication device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a data transmission control method for a communication device according to an embodiment of the present invention; the data transmission control method of the communication equipment comprises the following steps:
s1, when the data transmission of the communication equipment fails, carrying out spectrum processing on the communication equipment;
s2, data transmission is carried out according to the processed frequency spectrum;
it should be noted that the data transmission control method of the communication device according to the embodiment of the present invention may be implemented by the communication device, where the communication device is a wireless communication device, and the communication device is used as a sending end and is configured to transmit data to a receiving end.
Preferably, the spectrum processing includes at least one of the following four modes:
the method a is that the frequency spectrum is moved according to a preset deviation value and a preset deviation direction;
the method b is that the frequency spectrum is split and data is copied according to a preset copy multiple, so that the frequency spectrum is split into a plurality of sub-channels;
the method c, grouping the frequency spectrum according to the preset grouping number to divide the frequency spectrum into a plurality of groups of subcarriers;
mode d, channels in the spectrum are adapted to include narrow channels for transmitting data and redundant channels for data check and error correction.
It should be noted that the above four manners may be used individually or in combination, that is, the spectrum processing has 15 processing manners, which are respectively: a. b, c, d, a + b, a + c, a + d, b + c, b + d, c + d, a + b + c, a + b + d, a + c + d, b + c + d, a + b + c + d.
Specifically, in the method a, when data transmission of the communication device fails, a spectrum shifting (channel shifting) technology is used to shift the spectrum of the communication device, and data transmission is performed using the currently shifted spectrum. Because the interference degrees of different frequency points are different and the interference of the edge frequency band is generally small, the interference intensity in the frequency band can be improved by adopting frequency spectrum shifting. The specific process of shifting the frequency spectrum can be seen in fig. 2, the frequency spectrum of the subcarrier in fig. 2 is only shown by the OFDM subcarrier, the correct waveform of the frequency spectrum of the subcarrier is a sinc signal (i.e., sin (f)/f signal), and here, for the sake of better clarity of the graph, the trailing part signal is omitted.
Illustratively, the frequency spectrum of the communication device is shifted according to a preset offset value and a preset offset direction. The offset value and the offset direction may be set according to a current working channel, the offset direction may be left or right, and the offset value may be 2MHz, 5MHz, or 10MHz, which is not specifically limited in the present invention. If currently operating on the 5745 channel, then the shift is to the left, and if currently operating on the 5825 channel, then the shift is to the right. If the product supports spectrum scanning, intelligent adjustment can be achieved in conjunction with channel noise levels, e.g., left bias for 10MHz noise levels low, left bias, and vice versa.
Specifically, in the mode b, when data transmission fails, the frequency spectrum is split and data is copied according to the preset copy multiple. Splitting and data copying are carried out on a broadband carrier signal of a frequency spectrum, for example, when the copy multiple is 2, a channel with a bandwidth of 40MHz is split into 2 sub-channels with a bandwidth of 20MHz, wherein the 2 sub-channels with the bandwidth of 20MHz are used for data transmission, and data in each sub-channel with the bandwidth of 20MHz is the same. Or when the duplication multiple is 4, splitting the channel with the bandwidth of 40MHz into 4 sub-channels with the bandwidth of 10MHz, as shown in fig. 3, the splitting manner may be multiple, for example, the first and third 10M data are completely consistent, the second and fourth 10M data are completely consistent, or the 4 10M bandwidth data are completely consistent. When the data of 4 sub-channels with the bandwidth of 10MHz are completely consistent, the bandwidth for transmitting useful data is 10 MHz; if two are the same, the bandwidth for transmitting useful data is 20 MHz. As for which situation needs the data to be completely consistent, which situation needs the data to be inconsistent depends on the environmental interference, and flexible adjustment can be performed according to the interference size. It should be noted that the number of channel splits, the bandwidth division and the combination are not limited to the above examples.
Further, when the data transmission fails after the spectrum splitting, the method further includes steps S11 to S12:
s11, adjusting the copy multiple; wherein the adjusted copy multiple is greater than the copy multiple before adjustment;
and S12, re-splitting the frequency spectrum and copying data according to the adjusted copy multiple so as to split the frequency spectrum into a plurality of sub-channels. At this time, data transmission is performed with the current subchannel.
Specifically, if data transmission still fails after carrier spectrum replication is adopted, the interference resistance can be further improved by setting a larger replication multiple, for example, a channel with a bandwidth of 40MHz is split into 6 sub-channels with a bandwidth of 5MHz (for data repetition) and 1 sub-channel with a bandwidth of 10MHz (for data check and error correction), and a specific implementation flow of carrier spectrum replication can refer to fig. 4.
Specifically, in the method c, when data transmission fails, the frequency spectrum is grouped according to a preset grouping number, so as to divide the frequency spectrum into a plurality of groups of subcarriers. For example, in a 10M bandwidth, 28 subcarriers are provided, and when the number of the groups is 4, the 28 subcarriers may be divided into 4 groups, each group has 7 subcarriers, the data of each subcarrier in a group may be the same, or the data of 1 and 3 groups may be the same, and the grouping manner is not limited. The grouped subcarriers include data subcarriers for transmitting data and pilot frame subcarriers for synchronizing data. For example, a 40MHz wide channel before splitting includes 112 subcarriers, where 108 subcarriers are data subcarriers for transmitting data; and 4 subcarriers are used for data synchronization.
Further, when the data transmission fails after the spectrum grouping, the method further includes steps S21 to S22:
s21, adjusting the grouping number; wherein the number of the adjusted packets is greater than the number of the packets before the adjustment;
and S22, regrouping the frequency spectrum according to the adjusted grouping number so as to divide the frequency spectrum into a plurality of groups of subcarriers. At this time, data transmission is performed by using the sub-carriers after the current grouping.
Specifically, in the method d, when data transmission fails, a channel in the spectrum is adjusted to a plurality of narrow channels of the same data, and a certain redundant channel is reserved for data check and error correction. Different from the traditional time domain added with the checksum error correction code, if the channel has interference, the checksum error correction code can easily receive the interference (the premise of error correction is that the checksum error correction code transmitted by the AP end can be correctly analyzed); the redundant channel is in the frequency domain, the frequency domain position of the redundant channel can be flexibly selected, the interference frequency point is effectively avoided, the probability of being interfered is reduced, the time domain cost is reduced, and the data transmission efficiency is improved.
The anti-interference capability can be effectively improved by adopting a mode of combining spectrum replication, subcarrier replication and redundant channel data verification. On one hand, the interference intensity of different frequencies is different, so the possibility that a plurality of narrow channels are simultaneously interfered is relatively reduced, and on the other hand, the data repetition of useful channels can increase the statistical sample of data error correction and improve the success rate of data error correction and data recovery. The redundancy bandwidth is wide, the requirement on the efficiency of data error correction coding is not high, and a more intelligent and reliable data check and error correction mechanism can be realized, so that data check and error correction are performed by adding check codes and error correction codes into data carried by each subcarrier, the reliability of data check is greatly improved, and the data recovery probability is improved. The bandwidth and the frequency domain position of the redundant channel are not limited, and can be on the left side, the right side or the middle of the whole channel. As shown in fig. 5, a channel with a bandwidth of 40MHz is split into 4 channels with a bandwidth of 10MHz, wherein 3 channels with a bandwidth of 10MHz are used for data transmission, data modulation in each channel with a bandwidth of 10MHz may be the same or different, and the remaining 1 channel with a bandwidth of 10MHz is used for data check and error correction coding. Alternatively, as shown in fig. 6, the sub-carriers in the first 30MHz bandwidth channel may be used for data transmission, and the sub-carriers in the redundant 10MHz bandwidth channel may be added with data checking and error correcting functions.
Further, the data check and error correction mechanism may also be continuously changed and optimized to more intelligently implement the data recovery function, and improve the data recovery probability, and the implementation flowchart is shown in fig. 7.
It should be noted that the above-described step patterns a to d may be implemented together according to a certain rule. If the number of packets for the kth spectral splitting is Xk, the number of packets for the kth subcarrier replication is Yk, and the redundant channel data checksum error correction coding scheme adopted for the kth time is Zk, where k is 1,2, and 3 …. If Xm is 2,3,4,5,6, X1 is 2, X2 is 3, i.e., the number of 1 st subcarrier duplicate packets is 2 and the number of 2 nd subcarrier packets is 3. The table look-up method is used to combine the four approaches, and the flow chart is shown in fig. 8.
In a preferred embodiment, when the spectrum processing includes four modes, the performing spectrum processing on the communication device to perform data transmission in a processed spectrum specifically includes S31 to S34:
s31, when the data transmission of the communication equipment fails, moving the frequency spectrum according to a preset offset value and a preset offset direction, and performing data transmission according to the currently moved frequency spectrum;
s32, when the data transmission fails after the spectrum is moved, splitting and copying the moved spectrum according to a preset copy multiple so as to split the spectrum into a plurality of sub-channels, and transmitting the data by using the current sub-channel;
s33, when data transmission fails after channel splitting, grouping the carriers in the sub-channels according to a preset grouping number to divide the frequency spectrum into a plurality of groups of sub-carriers, and performing data transmission by the currently grouped sub-carriers;
and S34, when the data transmission fails after the carrier grouping is finished, adjusting the channels after the frequency spectrum shifting to comprise narrow channels for transmitting data and redundant channels for data checking and error correction, and transmitting the data by using the current narrow channels.
The working principle of each step can refer to the working process in the above-mentioned modes a to d, and is not described herein again. It should be noted that, when the data transmission is successful after the spectrum shift is performed, the steps S32 to S34 do not need to be executed, which is equivalent to only adopting the method a; when the data transmission is successful after the channel splitting is finished, the steps S33-S34 do not need to be executed at this time, which is equivalent to adopting the mode a + the mode b; when the data transmission is successful after the carrier grouping is finished, the step S34 does not need to be executed, which is equivalent to adopting the mode a + the mode b + the mode c; when the data transmission fails after the carrier grouping is completed, steps S31 to S43 are executed, which corresponds to the method a + the method b + the method c + the method d.
Compared with the prior art, the data transmission control method of the communication equipment disclosed by the invention comprises the following steps of firstly, carrying out spectrum processing on the communication equipment when the data transmission of the communication equipment fails; and then, carrying out data transmission in the processed frequency spectrum. The data transmission control method of the communication equipment disclosed by the embodiment of the invention can effectively improve the stability and reliability of the communication of the wireless communication equipment in a strong interference environment; the spectrum moving mechanism, the spectrum copying mechanism, the subcarrier copying mechanism and the redundant channel are used for combining data check and error correction, so that the success rate of data transmission can be effectively improved; the redundant channel is used for a check and error correction mechanism, the data check and error correction functions are realized in a frequency domain, the transmission mode is essentially different from the traditional transmission mode in a time domain, check and error correction codes can be modulated into a subcarrier with small frequency interference after frequency spectrum shifting in the frequency domain, the error correction and data recovery capacity is improved, multiple transmission in the time domain can be avoided, and the transmission efficiency is improved.
Referring to fig. 9, fig. 9 is a block diagram of a data transmission control system 10 of a communication device according to an embodiment of the present invention. The communication device data transmission control system 10 includes:
the spectrum processing module 11 is configured to perform spectrum processing on the communication device when data transmission of the communication device fails;
the data transmission module 12 is configured to perform data transmission with the currently shifted frequency spectrum;
wherein, the spectrum processing module 11 includes at least one of the following units:
the frequency spectrum moving unit is used for moving the frequency spectrum according to a preset offset value and a preset offset direction;
the spectrum replication unit is used for splitting a spectrum and replicating data according to a preset replication multiple so as to split the spectrum into a plurality of sub-channels;
the system comprises a spectrum grouping unit, a spectrum grouping unit and a spectrum processing unit, wherein the spectrum grouping unit is used for grouping a spectrum according to a preset grouping number so as to divide the spectrum into a plurality of groups of subcarriers;
and a spectrum adjusting unit for adjusting channels in the spectrum to include a narrow channel for transmitting data and a redundant channel for data check and error correction.
It should be noted that the communication device data transmission control system 10 in the embodiment of the present invention may be the communication device, where the communication device is a wireless communication device, and the communication device is used as a sending end and is used to transmit data to a receiving end.
Specifically, the spectrum shifting unit shifts the spectrum of the communication device by using a spectrum shifting (channel shifting) technology, and performs data transmission with the currently shifted spectrum. Because the interference degrees of different frequency points are different and the interference of the edge frequency band is generally small, the interference intensity in the frequency band can be improved by adopting frequency spectrum shifting.
Illustratively, the frequency spectrum of the communication device is shifted according to a preset offset value and a preset offset direction. The offset value and the offset direction may be set according to a current working channel, the offset direction may be left or right, and the offset value may be 2MHz, 5MHz, or 10MHz, which is not specifically limited in the present invention. If currently operating on the 5745 channel, then the shift is to the left, and if currently operating on the 5825 channel, then the shift is to the right. If the product supports spectrum scanning, intelligent adjustment can be achieved in combination with channel noise levels. If the left-hand offset 10MHz noise level is low, then the left-hand offset is left, and vice versa.
Specifically, the spectrum replication unit splits a spectrum and replicates data according to a preset replication multiple. The spectrum replication unit splits the spectrum-shifted wideband carrier signal and replicates data, for example, when the replication multiple is 2, splitting a channel with a bandwidth of 40MHz into 2 subchannels with a bandwidth of 20MHz, where 2 subchannels with 20MHz are used for data transmission, and data in the subchannels with 20MHz are the same. Or the channel with the bandwidth of 40MHz is split into 4 sub-channels with the bandwidth of 10MHz, the splitting manner may be multiple, for example, the first and third 10M data are completely consistent, the second and fourth 10M data are completely consistent, or when the duplication multiple is 4, the 4 10M bandwidth data are completely consistent. When the data of the 4 channels with the bandwidth of 10MHz are completely consistent, the bandwidth for transmitting useful data is 10 MHz; if two are the same, the bandwidth for transmitting useful data is 20 MHz. As for which situation needs the data to be completely consistent, which situation needs the data to be inconsistent depends on the environmental interference, and flexible adjustment can be performed according to the interference size. It should be noted that the number of channel splits, the bandwidth division and the combination are not limited to the above examples.
Further, the spectrum replication unit is further configured to:
when the data transmission fails after the spectrum splitting is finished, adjusting the copy multiple; wherein the adjusted copy multiple is greater than the copy multiple before adjustment; and performing re-splitting and data copying on the frequency spectrum according to the adjusted copy multiple so as to split the frequency spectrum into a plurality of sub-channels. At this time, the data transmission module 12 performs data transmission with the current sub-channel.
Specifically, if data transmission still fails after carrier spectrum replication, the interference rejection can be further improved by setting a larger replication multiple, for example, a 40MHz bandwidth channel is split into 6 subchannels with a bandwidth of 5MHz (for data repetition) and 1 subchannel with a bandwidth of 10MHz (for data check and error correction).
Specifically, the spectrum grouping unit further performs subcarrier replication on data in each subchannel bandwidth, for example, 28 subcarriers are total in 10M bandwidth, when the grouping number is 4, the 28 subcarriers can be divided into 4 groups, each group has 7 subcarriers, the data of each subcarrier in a group can be the same, or the data of 1 and 3 groups can be the same, and the grouping mode is not limited. The grouped subcarriers include data subcarriers for transmitting data and pilot frame subcarriers for synchronizing data. For example, a 40MHz wide channel before splitting includes 112 subcarriers, where 108 subcarriers are data subcarriers for transmitting data; and 4 subcarriers are used for data synchronization.
Further, the spectrum grouping unit is further configured to:
when the data transmission fails after the spectrum grouping is finished, adjusting the grouping number; wherein the number of the adjusted packets is greater than the number of the packets before the adjustment; the spectrum is regrouped according to the adjusted number of packets to divide the spectrum into groups of subcarriers. At this time, the data transmission module 12 performs data transmission with the currently grouped subcarriers.
Specifically, the channel adjusting unit adjusts the wideband channel into a plurality of narrow channels of the same data, and leaves a certain redundant channel for data check and error correction. Different from the traditional time domain added with the checksum error correction code, if the channel has interference, the checksum error correction code can easily receive the interference (the premise of error correction is that the checksum error correction code transmitted by the AP end can be correctly analyzed); the redundant channel is in the frequency domain, the frequency domain position of the redundant channel can be flexibly selected, the interference frequency point is effectively avoided, the probability of being interfered is reduced, the time domain cost is reduced, and the data transmission efficiency is improved.
The anti-interference capability can be effectively improved by adopting a mode of combining spectrum replication, subcarrier replication and redundant channel data verification. On one hand, the interference intensity of different frequencies is different, so the possibility that a plurality of narrow channels are simultaneously interfered is relatively reduced, and on the other hand, the data repetition of useful channels can increase the statistical sample of data error correction and improve the success rate of data error correction and data recovery. The redundancy bandwidth is wide, the requirement on the efficiency of data error correction coding is not high, and a more intelligent and reliable data check and error correction mechanism can be realized, so that data check and error correction are performed by adding check codes and error correction codes into data carried by each subcarrier, the reliability of data check is greatly improved, and the data recovery probability is improved. The bandwidth and the frequency domain position of the redundant channel are not limited, and can be on the left side, the right side or the middle of the whole channel. For example, a channel with a bandwidth of 40MHz is split into 4 channels with a bandwidth of 10MHz, wherein 3 channels with a bandwidth of 10MHz are used for data transmission, data modulation in each channel with a bandwidth of 10MHz may be the same or different, and the remaining 1 channel with a bandwidth of 10MHz is used for data check and error correction coding. Alternatively, the sub-carriers in the first 30MHz bandwidth channel may be used for data transmission, and the sub-carriers in the redundant 10MHz bandwidth channel may be added with data checking and error correcting functions.
Furthermore, the data checking and error correcting mechanism can also be continuously changed and optimized, so that the data recovery function is realized more intelligently, and the data recovery probability is improved.
Compared with the prior art, the communication equipment data transmission control system 10 disclosed by the invention has the advantages that firstly, when the data transmission of the communication equipment fails, the frequency spectrum processing module 11 carries out frequency spectrum processing on the communication equipment; the data processing module 12 then performs data transmission in the processed spectrum. The communication equipment data transmission control system 10 disclosed by the embodiment of the invention can effectively improve the stability and reliability of the communication of the wireless communication equipment in a strong interference environment; the spectrum moving mechanism, the spectrum copying mechanism, the subcarrier copying mechanism and the redundant channel are used for combining data check and error correction, so that the success rate of data transmission can be effectively improved; the redundant channel is used for a check and error correction mechanism, the data check and error correction functions are realized in a frequency domain, the transmission mode is essentially different from the traditional transmission mode in a time domain, check and error correction codes can be modulated into a subcarrier with small frequency interference after frequency spectrum shifting in the frequency domain, the error correction and data recovery capacity is improved, multiple transmission in the time domain can be avoided, and the transmission efficiency is improved.
Referring to fig. 10, fig. 10 is a block diagram of a data transmission control device 20 of a communication device according to an embodiment of the present invention. The communication device data transmission control device 20 of this embodiment includes: a processor 21, a memory 22 and a computer program stored in said memory 22 and executable on said processor 21. The processor 21, when executing the computer program, implements the steps in the above-described communication device data transmission control method embodiment, such as steps S1 to S2 shown in fig. 1. Alternatively, the processor 21, when executing the computer program, implements the functions of the modules/units in the above-mentioned device embodiments, such as the spectrum processing module 11.
Illustratively, the computer program may be divided into one or more modules/units, which are stored in the memory 22 and executed by the processor 21 to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program in the communication device data transmission control device 20. For example, the computer program may be divided into a spectrum processing module 11 and a data transmission module 12, and for the specific functions of each module, reference is made to the specific working process of the data transmission control system 10 of the communication device described in the foregoing embodiment, which is not described herein again.
The communication device data transmission control device 20 may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server, and the communication device data transmission control device 20 may also be a product with a wireless communication function, such as a wireless router. The communication device data transmission control device 20 may include, but is not limited to, a processor 21, a memory 22. It will be understood by those skilled in the art that the schematic diagram is merely an example of the communication device data transmission control device 20, and does not constitute a limitation of the communication device data transmission control device 20, and may include more or less components than those shown, or combine some components, or different components, for example, the communication device data transmission control device 20 may further include an input-output device, a network access device, a bus, etc.
The Processor 21 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a microprocessor or the processor 21 may be any conventional processor or the like, the processor 21 being the control center of the communication device data transmission control device 20 and connecting the various parts of the entire communication device data transmission control device 20 with various interfaces and lines.
The memory 22 may be used for storing the computer programs and/or modules, and the processor 21 implements various functions of the communication device data transmission control device 20 by running or executing the computer programs and/or modules stored in the memory 22 and calling data stored in the memory 22. The memory 22 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory 22 may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The integrated modules/units of the communication device data transmission control device 20 may be stored in a computer readable storage medium if they are implemented in the form of software functional units and sold or used as independent products. Based on such understanding, all or part of the flow of the method according to the above embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium and used by the processor 21 to implement the steps of the above embodiments of the method. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. 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 the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A method for controlling data transmission of a communication device, comprising:
when the data transmission of the communication equipment fails, carrying out spectrum processing on the communication equipment;
performing data transmission by using the processed frequency spectrum;
the spectrum processing comprises at least one of the following four modes:
moving the frequency spectrum according to a preset offset value and a preset offset direction;
splitting a frequency spectrum and copying data according to a preset copy multiple so as to split the frequency spectrum into a plurality of sub-channels;
grouping a frequency spectrum according to a preset grouping number so as to divide the frequency spectrum into a plurality of groups of subcarriers;
channels in the spectrum are adapted to include narrow channels for transmitting data and redundant channels for data checksum error correction.
2. The data transmission control method of communication equipment according to claim 1, wherein when the data transmission fails after the spectrum splitting, further comprising:
adjusting the copy multiple; wherein the adjusted copy multiple is greater than the copy multiple before adjustment;
and performing re-splitting and data copying on the frequency spectrum according to the adjusted copy multiple so as to split the frequency spectrum into a plurality of sub-channels.
3. The communication device data transmission control method of claim 1, wherein the sub-carriers after grouping include a data sub-carrier for transmitting data and a leading frame sub-carrier for synchronizing data.
4. The data transmission control method of communication equipment according to claim 1, wherein when data transmission fails after the spectrum grouping, further comprising:
adjusting the number of packets; wherein the number of the adjusted packets is greater than the number of the packets before the adjustment;
the spectrum is regrouped according to the adjusted number of packets to divide the spectrum into groups of subcarriers.
5. The method for controlling data transmission of a communication device according to claim 1, wherein when the spectrum processing includes four modes, the performing spectrum processing on the communication device to perform data transmission in a processed spectrum specifically includes:
when the data transmission of the communication equipment fails, the frequency spectrum is moved according to a preset offset value and a preset offset direction, and the data transmission is carried out according to the currently moved frequency spectrum;
when the data transmission fails after the spectrum moving, splitting and copying the moved spectrum according to a preset copy multiple so as to split the spectrum into a plurality of sub-channels, and transmitting data by using the current sub-channel;
when the data transmission fails after the channel splitting is finished, grouping the carriers in the sub-channels according to a preset grouping number so as to divide the frequency spectrum into a plurality of groups of sub-carriers, and performing data transmission by using the currently grouped sub-carriers;
when the data transmission fails after the carrier grouping is finished, the channel after the frequency spectrum shifting is adjusted to comprise a narrow channel for transmitting data and a redundant channel for data checking and error correction, and the data transmission is carried out by using the current narrow channel.
6. A communication device data transmission control system, comprising:
the frequency spectrum processing module is used for carrying out frequency spectrum processing on the communication equipment when the data transmission of the communication equipment fails;
the data transmission module is used for transmitting data by the processed frequency spectrum;
wherein the spectrum processing module comprises at least one of the following units:
the frequency spectrum moving unit is used for moving the frequency spectrum according to a preset offset value and a preset offset direction;
the spectrum replication unit is used for splitting a spectrum and replicating data according to a preset replication multiple so as to split the spectrum into a plurality of sub-channels;
the system comprises a spectrum grouping unit, a spectrum grouping unit and a spectrum processing unit, wherein the spectrum grouping unit is used for grouping a spectrum according to a preset grouping number so as to divide the spectrum into a plurality of groups of subcarriers;
and a spectrum adjusting unit for adjusting channels in the spectrum to include a narrow channel for transmitting data and a redundant channel for data check and error correction.
7. The communication device data transmission control system of claim 6, wherein the spectrum replication unit is further configured to:
when the data transmission fails after the spectrum splitting is finished, adjusting the copy multiple; wherein the adjusted copy multiple is greater than the copy multiple before adjustment;
and performing re-splitting and data copying on the frequency spectrum according to the adjusted copy multiple so as to split the frequency spectrum into a plurality of sub-channels.
8. The communication device data transmission control system of claim 6, wherein the spectrum grouping unit is further configured to:
when the data transmission fails after the spectrum grouping is finished, adjusting the grouping number; wherein the number of the adjusted packets is greater than the number of the packets before the adjustment;
the spectrum is regrouped according to the adjusted number of packets to divide the spectrum into groups of subcarriers.
9. A communication device data transmission control device comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the communication device data transmission control method of any one of claims 1 to 5 when executing the computer program.
10. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the communication apparatus data transmission control method according to any one of claims 1 to 5.
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