CN107332645B - Wireless communication equipment rate modulation method and device based on self-adaptive learning mechanism - Google Patents
Wireless communication equipment rate modulation method and device based on self-adaptive learning mechanism Download PDFInfo
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- 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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
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Abstract
The invention discloses a wireless communication equipment rate modulation method and a device based on a self-adaptive learning mechanism, wherein a message is sent in a modulation coding mode corresponding to an SNR value to obtain the actual sending success rate in the current environment, the actual success rate is compared with the success rate before rate adjustment, and the modulation mode is adjusted by using the comparison result to obtain the modulation coding mode adaptive to the current environment. Therefore, when the environments are different, the SNR prior table can be automatically updated, so that the communication equipment can obtain the corresponding SNR threshold value in each debugging mode, and the automatic updating of the SNR does not need a large amount of investment time and labor, is convenient to operate and is easy to realize. The invention also provides a wireless communication equipment rate modulation device based on the self-adaptive learning mechanism, and the technical effects can be realized.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for modulating a rate of a wireless communication device based on an adaptive learning mechanism.
Background
At present, wireless communication devices are more and more common, and in order to ensure a communication effect and overcome problems in long-distance signal transmission, a signal spectrum must be moved to a high-frequency channel through modulation for transmission.
In a communication system, an SNR (signal to noise ratio) look-ahead table is required to specify modulation coding modes adopted by a device under different SNR channel conditions, wherein the SNR look-ahead table refers to a table formed by various modulation coding modes and corresponding adjustment threshold SNR values. However, in different environments, such as basement, building floor, busy region, mountain region, sea surface, etc., the required SNR threshold of the communication device in each debugging mode is different.
The prior solution is to test a prior table according to different use environments, and after the test is finished, the prior table is led into a self-adaptive rate control unit of wireless communication equipment in the current environment and then delivered for use, however, the use environments of different users are different, and the work of establishing an SNR prior table under different scenes is very complicated, so the work is very time-consuming and labor-consuming; moreover, this method is not effective when the user's use environment is uncertain, or when the scene is frequently changed in use.
Therefore, how to efficiently determine the optimal modulation and coding scheme in different environments is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a wireless communication equipment rate modulation method and a wireless communication equipment rate modulation device based on an adaptive learning mechanism, so as to efficiently determine the optimal modulation and coding modes in different environments.
In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:
a wireless communication device rate modulation method based on an adaptive learning mechanism comprises the following steps:
establishing an initialization look-ahead table, wherein the initialization look-ahead table comprises SNR threshold intervals, a first initial modulation coding mode corresponding to each SNR threshold interval and an initial sending success rate corresponding to each SNR threshold interval;
receiving an actual SNR value, determining a target SNR threshold interval where the actual SNR value is located, and determining a target modulation coding mode corresponding to the actual SNR value by using the target SNR threshold interval;
transmitting a data message by using the target modulation coding mode, and calculating a first actual transmission success rate of the data message;
judging whether the first actual sending success rate is greater than or equal to the initial sending success rate corresponding to the target modulation coding mode;
if so, the grade of the target modulation coding mode is adjusted upwards, and the initialization look-ahead table is updated;
if not, the target is adjusted to the level of the coding mode to be adjusted downwards, and the initialization preoperative table is updated.
Wherein the SNR threshold interval comprises at least one SNR threshold subinterval;
the SNR threshold subintervals are obtained by dividing the SNR threshold interval, the SNR threshold subintervals divided by the same SNR threshold interval are sibling subintervals, and the sibling subintervals correspond to the same first initial modulation coding mode and the same initial transmission success rate.
Wherein the updating the initialization look-ahead table comprises:
judging whether the grade of the target modulation coding mode is adjusted upwards or not;
if so, taking the target modulation coding mode after being adjusted as a second initial modulation coding mode of the target SNR threshold interval, and taking the first actual success rate as the initial success rate of the target SNR threshold interval;
if not, the target modulation coding mode after the down regulation is used as a third initial modulation coding mode of the target SNR threshold interval, and the first actual success rate is used as the initial success rate of the target SNR threshold interval.
If the first actual transmission success rate is greater than or equal to the initial transmission success rate corresponding to the target modulation coding mode, after updating the initialization pre-check table, the method further includes:
sending the message data again by using the adjusted target modulation coding mode, and calculating to obtain a second actual sending success rate;
judging whether the second actual sending success rate is greater than or equal to the first actual sending success rate or not;
if yes, the grades of the first initial modulation coding modes corresponding to the same level subintervals larger than the target SNR threshold subintervals are all adjusted upwards;
if not, the target modulation coding mode is restored to the first initial modulation coding mode corresponding to the first actual SNR value.
If the first actual transmission success rate is less than the initial transmission success rate corresponding to the target modulation coding mode, updating the initialization pre-check table, and then the method further includes:
sending the message data again by using the down-regulated target modulation coding mode, and calculating to obtain a third actual sending success rate;
judging whether the third actual sending success rate is smaller than the first actual sending success rate;
if yes, the grades of the first initial modulation coding modes corresponding to the same level subintervals smaller than the target SNR threshold subintervals are all adjusted downwards;
if not, the target modulation coding mode is restored to the first initial modulation coding mode corresponding to the first actual SNR value.
Wherein, after updating the initialization look-ahead table, the method further comprises:
and storing the updated initialization look-ahead table to the FPGA ROM.
An apparatus for rate modulation of a wireless communication device based on an adaptive learning mechanism, comprising:
the device comprises an initialization look-ahead table establishing module, a first transmission success rate determining module and a second transmission success rate determining module, wherein the initialization look-ahead table establishing module is used for establishing an initialization look-ahead table, and the initialization look-ahead table comprises SNR threshold intervals, a first initial modulation coding mode corresponding to each SNR threshold interval and an initial transmission success rate corresponding to each SNR threshold interval;
an actual SNR value receiving module, configured to receive an actual SNR value, determine a target SNR threshold interval where the actual SNR value is located, and determine a target modulation and coding scheme corresponding to the actual SNR value by using the target SNR threshold interval;
the actual sending success rate calculation module is used for sending a data message by using the target modulation coding mode and calculating a first actual sending success rate of the data message;
the first judgment module is used for judging whether the first actual transmission success rate is greater than or equal to the initial transmission success rate corresponding to the target modulation coding mode, if so, the up-regulation module is called, and if not, the down-regulation module is called;
the up-regulation module is used for up-regulating the grade of the target modulation coding mode and updating the initialization look-ahead table;
and the down-regulation module is used for regulating the target to the coding mode level to be down-regulated and updating the initialization look-ahead table.
Wherein the SNR threshold interval comprises at least one SNR threshold subinterval;
the SNR threshold subintervals are obtained by dividing the SNR threshold interval, the SNR threshold subintervals divided by the same SNR threshold interval are sibling subintervals, and the sibling subintervals correspond to the same first initial modulation coding mode and the same initial transmission success rate.
Wherein, still include:
the second actual success rate calculation module is used for retransmitting the message data by utilizing the target modulation coding mode after being adjusted upwards and calculating to obtain a second actual transmission success rate;
the second judgment module is used for judging whether the second actual sending success rate is greater than or equal to the first actual sending success rate, if so, the same level modulation coding mode up-regulation module is called, and if not, the first restoration module is called;
the peer modulation coding mode up-regulation module is used for up-regulating the grades of first initial modulation coding modes corresponding to peer subintervals larger than the target SNR threshold subinterval;
the first restoring module is configured to restore the target modulation coding scheme to a first initial modulation coding scheme corresponding to the first actual SNR value.
Wherein, still include:
the third actual success rate calculation module is used for retransmitting the message data by using the down-regulated target modulation coding mode and calculating to obtain a third actual transmission success rate;
a third judging module, configured to judge whether the third actual sending success rate is smaller than the first actual sending success rate, if so, invoke a peer modulation and coding mode down-regulation module, and if not, invoke a second restoring module;
the peer modulation coding mode down-regulation module is used for down-regulating the grades of first initial modulation coding modes corresponding to peer subintervals smaller than the target SNR threshold subinterval;
the second restoring module is configured to restore the target modulation coding scheme to a first initial modulation coding scheme corresponding to the first actual SNR value.
According to the scheme, the rate modulation method of the wireless communication equipment based on the adaptive learning mechanism, provided by the invention, comprises the following steps: establishing an initialization look-ahead table, wherein the initialization look-ahead table comprises SNR threshold intervals, a first initial modulation coding mode corresponding to each SNR threshold interval and an initial sending success rate corresponding to each SNR threshold interval; receiving an actual SNR value, determining a target SNR threshold interval where the actual SNR value is located, and determining a target modulation coding mode corresponding to the actual SNR value by using the target SNR threshold interval; transmitting a data message by using the target modulation coding mode, and calculating a first actual transmission success rate of the data message; judging whether the first actual sending success rate is greater than or equal to the initial sending success rate corresponding to the target modulation coding mode; if so, the grade of the target modulation coding mode is adjusted upwards, and the initialization look-ahead table is updated; if not, the target is adjusted to the level of the coding mode to be adjusted downwards, and the initialization preoperative table is updated.
Therefore, the rate modulation method of the wireless communication device provided by the embodiment of the invention transmits the message through the modulation coding mode corresponding to the SNR value to obtain the actual success rate of transmission in the current environment, and adjusts the modulation coding mode through the comparison result of the success rates by comparing the actual success rate with the initial success rate in the initialized SNR look-up table to obtain the modulation coding mode suitable for the current environment. Therefore, when the environments are different, the SNR prior table can be automatically updated, so that the communication equipment can obtain the corresponding SNR threshold value in each debugging mode, and the automatic updating of the SNR does not need a large amount of investment time and labor, is convenient to operate and is easy to realize. The invention also provides a wireless communication equipment rate modulation device based on the self-adaptive learning mechanism, and the technical effects can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for modulating a rate of a wireless communication device based on an adaptive learning mechanism according to an embodiment of the present invention;
fig. 2 is a flowchart of a specific adaptive learning mechanism-based rate modulation method for a wireless communication device according to an embodiment of the present invention;
fig. 3 is a flowchart of a specific adaptive learning mechanism-based rate modulation method for a wireless communication device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a specific adaptive learning mechanism-based rate modulation apparatus for wireless communication devices 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.
The embodiment of the invention discloses a wireless communication equipment rate modulation method and a wireless communication equipment rate modulation device based on a self-adaptive learning mechanism, which are used for efficiently determining the optimal modulation coding modes in different environments.
Referring to fig. 1, a method for modulating a rate of a wireless communication device based on an adaptive learning mechanism provided in an embodiment of the present invention specifically includes:
s101, establishing an initialization look-ahead table, wherein the initialization look-ahead table comprises SNR threshold intervals, a first initial modulation coding mode corresponding to each SNR threshold interval and an initial sending success rate corresponding to each SNR threshold interval.
Specifically, in a more ideal environment, an ideal SNR look-ahead table is determined as an initialization look-ahead table, as shown in table 1, the table includes SNR threshold values, a first initial modulation and coding scheme corresponding to each SNR threshold interval, and an initial transmission success rate corresponding to each SNR threshold interval, where one SNR threshold interval is between every two adjacent SNR threshold values.
Table 1 initializing prior tables
| First initial modulation coding mode | SNR threshold value | Initial transmission success rate |
Specifically, the radio frequency interfaces of two wireless communication devices can be connected by adopting a feeder line and an attenuator, and each first initial modulation coding mode is obtained by adjusting the attenuation value of the attenuator by 1db
Next, at the initial transmission success rates corresponding to different SNR threshold values, a relationship table of the SNR threshold values and the initial transmission success rates corresponding to the SNR threshold values in each first modulation mode is finally drawn, as shown in table 2, where an SNR threshold interval is between every two adjacent SNR threshold values.
TABLE 2 initialize Prior Table
S102, receiving an actual SNR value, determining a target SNR threshold interval where the actual SNR value is located, and determining a target modulation coding mode corresponding to the actual SNR value by using the target SNR threshold interval.
Specifically, the sender device obtains an actual SNR value reported by the receiver from a packet carrying a receiver signal strength value, finds out which two adjacent SNR threshold values the actual SNR value is between by initializing a priori table, that is, determines an SNR threshold interval in which the actual SNR value is located, and then uses a corresponding first initial modulation and coding mode found by initializing a priori table as a target modulation and coding mode and a corresponding initial sending success rate.
It should be noted that, the first initial modulation and coding scheme and the actual success rate corresponding to the SNR threshold value in the SNR threshold interval are the same as the first initial modulation and coding scheme and the actual success rate corresponding to the first SNR threshold value in the interval. For example, if two adjacent SNR thresholds in table 1 are X, Y, the first initial modulation and coding scheme and the actual success rate corresponding to all SNR thresholds that do not include Y are between X, Y, and are the same as the first initial modulation and coding scheme and the actual success rate corresponding to X.
For example, in the present solution, the actual SNR value is a value between SNR9_ Threshold and SNR12_ Threshold, and according to table 2, the SNR Threshold interval is SNR9_ Threshold to SNR12_ Threshold, the corresponding target modulation and coding scheme is 9M, BPSK, 3/4, and the initial transmission success rate is P9.
S103, sending a data message by using the target modulation coding mode, and calculating a first actual sending success rate of the data message.
After determining a target modulation coding mode of an actual SNR threshold value, a sender sends a data message according to the modulation coding mode, and records a total sending frame number, a reserved channel failure frame number and a successful sending frame number in a sending window in the sending period so as to calculate an actual sending success rate as a first actual sending success rate.
Specifically, if it is determined that the target coding mode of the actual SNR threshold value is 9M, BPSK, 3/4, the data packet is sent according to the modulation coding mode, and the actual success rate in the modulation coding mode is calculated.
It should be noted that the total number of transmission frames is the total number of unicast frames transmitted by the device in one transmission window, and the number of reserved channel failure frames is the sum of the number of transmission failure frames due to the network load.
And S104, judging whether the first actual transmission success rate is more than or equal to the initial transmission success rate corresponding to the target modulation coding mode.
In the scheme, whether the first initial modulation and coding mode can reach an ideal success rate in an actual environment can be determined through comparison of success rates, that is, whether the first initial modulation and coding mode is an ideal modulation and coding mode in a current environment is determined.
Specifically, after the end of the transmission window, it is determined whether the first actual transmission success rate is greater than or equal to the initial transmission success rate corresponding to the target modulation coding scheme.
When 9M, BPSK, 3/4 is selected, the initial transmission success rate is P9, and it is determined whether or not the first actual transmission success rate is P9 or more.
And S105, if yes, the grade of the target modulation coding mode is adjusted upwards, and the initialization preoperative table is updated.
It should be noted that, when the first actual sending success rate is greater than or equal to the initial sending success rate corresponding to the target modulation and coding scheme, it indicates that the current modulation and coding scheme is of a lower grade, the current modulation and coding scheme may be adjusted by one grade, and the adjustment result is updated to the initialized look-ahead table after adjustment.
And S106, if not, adjusting the target to the coding mode level to be adjusted downwards, and updating the initialization look-ahead table.
It should be noted that, when the first actual sending success rate is less than the initial sending success rate corresponding to the target modulation and coding scheme, it indicates that the current modulation and coding scheme is higher in level, the current modulation and coding scheme may be adjusted down by one level, and the adjustment result is updated to the initialized pre-inspection table after adjustment.
In this embodiment, the updating the initialization look-ahead table may specifically include:
judging whether the grade of the target modulation coding mode is adjusted upwards or not;
if so, taking the target modulation coding mode after being adjusted as a second initial modulation coding mode of the target SNR threshold interval, and taking the first actual success rate as the initial success rate of the target SNR threshold interval;
specifically, if the target is adjusted to the coding mode level and then is adjusted up, the SNR prior table needs to be updated, and the modulation coding mode corresponding to the target SNR threshold interval and the corresponding success rate need to be changed. Specifically, the target modulation coding mode after being up-regulated, that is, the second initial modulation coding mode, may be used as the first initial modulation coding mode of the target SNR threshold interval in the updated initial look-up table; and taking the first actual success rate as the initial success rate corresponding to the target SNR interval in the updated initialization look-up table.
Specifically, when 9M, BPSK, 3/4 is selected, the initial transmission success rate is P9, and the first actual transmission success rate is greater than or equal to P9, the modulation scheme level corresponding to the interval where the actual SNR value is located is adjusted by one step, that is, the modulation scheme level corresponding to the interval where the actual SNR value is located is adjusted from 9M, BPSK, 3/4 to 12M, QPSK, 1/2, and the initialization look-ahead table is updated, as shown in table 3, Pn is the first actual success rate, and is used as the transmission success rate after the modulation and coding scheme is adjusted.
TABLE 3 updated concrete initialization look-ahead table
| First initial modulation coding mode | SNR threshold value | Initial transmission success rate |
| 6M，BPSK，1/2 | SNR6_Threshold | P6 |
| 12M，QPSK，1/2 | SNR9_Threshold | Pn |
| 12M，QPSK，1/2 | SNR12_Threshold | P12 |
| 18M，QPSK，3/4 | SNR18_Threshold | P18 |
| 24M，16-QAM，1/2 | SNR24_Threshold | P24 |
| 36M，16-QAM，3/4 | SNR36_Threshold | P36 |
| 48M，64-QAM，2/3 | SNR48_Threshold | P48 |
| 54M，64-QAM，3/4 | SNR54_Threshold | P54 |
If not, the target modulation coding mode after the down regulation is used as a third initial modulation coding mode of the target SNR threshold interval, and the first actual success rate is used as the initial success rate of the target SNR threshold interval.
Specifically, if the target is adjusted to the level of the coding scheme and then is adjusted, the SNR prior table also needs to be updated, and the modulation coding scheme corresponding to the target SNR threshold interval and the corresponding success rate need to be changed. Specifically, the down-adjusted target modulation coding mode, that is, the third initial modulation coding mode may be used as the first initial modulation coding mode of the target SNR threshold interval in the updated initial look-up table; and taking the first actual success rate as the initial success rate corresponding to the target SNR interval in the updated initialization look-up table. When 9M, BPSK, 3/4 is selected, the initial transmission success rate is P9, and the first actual transmission success rate is less than P9, the modulation scheme level corresponding to the interval where the actual SNR value is located is adjusted downward by one step, that is, the modulation scheme level is adjusted downward from 9M, BPSK, 3/4 to 6M, BPSK, 1/2, and the initialization look-ahead table is updated.
Therefore, the method for modulating the rate of the wireless communication equipment provided by the embodiment of the invention can be used for sending the message through the modulation coding mode corresponding to the SNR value to obtain the actual sending success rate in the current environment, and adjusting the modulation coding mode through the comparison result of the success rates by comparing the actual success rate with the initial success rate before the update rate in the initialized SNR look-up table to obtain the modulation coding mode suitable for the current environment. Therefore, when the environments are different, the SNR prior table can be automatically updated, so that the communication equipment can obtain the corresponding SNR threshold value in each debugging mode, and the automatic updating of the SNR does not need a large amount of investment time and labor, is convenient to operate and is easy to realize.
The embodiment of the present invention provides a specific rate modulation method for a wireless communication device based on an adaptive learning mechanism, which is different from the previous embodiment, the embodiment of the present invention specifically defines an SNR threshold interval in the foregoing embodiment, other steps are substantially the same as those in the previous embodiment, and specific contents may refer to the previous embodiment, which is not described herein again. Specifically, the method comprises the following steps:
the SNR threshold interval includes at least one SNR threshold subinterval.
The SNR threshold subintervals are obtained by dividing the SNR threshold interval, the SNR threshold subintervals divided by the same SNR threshold interval are sibling subintervals, and the sibling subintervals correspond to the same first initial modulation coding mode and the same initial transmission success rate.
Specifically, the SNR threshold sub-interval may be used as the SNR threshold interval described in the above embodiment. It should be noted that the SNR threshold subinterval is obtained by cutting the interval between two adjacent SNR threshold values, that is, the interval between two adjacent SNR threshold values may be divided into a plurality of fine subintervals, and when the modulation and coding scheme corresponding to the interval is adjusted, the modulation and coding scheme level between the cells in the original large interval is also adjusted.
In this scenario, the interval between the SNR Threshold values in table 2 may be cut to obtain fine sub-intervals, as shown in table 4, where the interval is Δ SNR, N6 is the largest integer that makes SNR6_ Threshold + (Δ SNR × N6) smaller than SNR9_ Threshold, and N9 is the largest integer that makes SNR9_ Threshold + (Δ SNR × N9) smaller than N12. Meanwhile, the total sending frame number and the reserved channel failure frame number can be recorded in the table so as to calculate the sending success rate.
TABLE 4 subinterval initialization look-ahead table
By dividing the large interval into a plurality of small intervals, the specific part in the initialization look-up table can be found more accurately and can be adjusted and updated more pertinently.
In the above embodiment, after a modulation and coding scheme corresponding to a certain subinterval is adjusted, the same adjustment needs to be performed on part of subintervals at the same level as the same condition of the subinterval, and therefore, in order to accelerate the adjustment speed of the modulation and coding scheme, referring to fig. 2 and fig. 3, an embodiment of the present invention provides a specific rate modulation method for a wireless communication device based on an adaptive learning mechanism, and specifically:
if the first actual transmission success rate is greater than or equal to the initial transmission success rate corresponding to the target modulation coding mode, after updating the initialization look-ahead table, the method further includes:
s201, the message data is sent again by using the target modulation coding mode after being adjusted, and a second actual sending success rate is obtained through calculation.
S202, judging whether the second actual sending success rate is larger than or equal to the first actual sending success rate.
After the modulation and coding scheme is adjusted, the adjustment result needs to be verified. In this scheme, two scenarios are verified.
In a first scenario, a priori table adapted to the current environment needs to be determined in time, the result can be tested immediately after updating, a target modulation and coding party after up-regulation tries to send a test message data, the test success rate is obtained and is used as a second actual sending success rate, and whether the second actual sending success rate is greater than or equal to the first actual sending success rate is judged.
In a second scenario, if a prior table adapted to the current environment does not need to be determined immediately, in order to reduce unnecessary message data transmission operations, when next communication is performed, after a next sending window is finished, an actual sending success rate of next message data is obtained and is used as a second sending success rate, and whether the second actual sending success rate is greater than or equal to the first actual sending success rate is determined.
And S203, if yes, the grades of the first initial modulation coding modes corresponding to the same level subintervals larger than the target SNR threshold subintervals are all up-regulated.
If the second actual sending success rate is greater than or equal to the first actual sending success rate, the up-regulation is successful, and the modulation modes corresponding to the target SNR threshold subinterval in the same subinterval can be up-regulated to accelerate the regulation speed of the modulation coding mode.
In the initialization look-up table, the subintervals corresponding to the same modulation and coding scheme and the same success rate are the same-level subintervals.
And S204, if not, reducing the target modulation coding mode to a first initial modulation coding mode corresponding to the first actual SNR value.
If the second actual transmission success rate is smaller than the first actual transmission success rate, it indicates that the up-regulation fails, and the up-regulated modulation coding mode grade needs to be restored to the modulation coding mode grade before the up-regulation.
If the first actual transmission success rate is less than the initial transmission success rate corresponding to the target modulation coding mode, after updating the initialization pre-check table, the method further includes:
s301, the message data is sent again by using the adjusted target modulation coding mode, and a third actual sending success rate is obtained through calculation.
S302, determine whether the third actual transmission success rate is less than the first actual transmission success rate.
It should be noted that, after the modulation and coding scheme level is adjusted downward, the adjustment result also needs to be verified. If a prior table suitable for the current environment needs to be determined in time, the result can be immediately tested after updating, a target modulation coding party after down regulation is used for trying to send a test message data, the test success rate is obtained and is used as a third actual sending success rate, and whether the third actual sending success rate is smaller than the first actual sending success rate is judged; if the prior table adapting to the current environment does not need to be determined immediately, in order to reduce unnecessary message data transmission operation, the actual sending success rate of the next message data can be obtained and used as the third sending success rate after the next sending window is finished in the next communication, and whether the third actual sending success rate is greater than or equal to the first actual sending success rate or not is judged.
And S303, if so, reducing the grades of the first initial modulation coding modes corresponding to the same level subintervals smaller than the target SNR threshold subintervals downwards.
It should be noted that, if the third actual sending success rate is smaller than the first actual sending success rate, it indicates that the down-regulation is successful, and the modulation modes corresponding to the target SNR threshold subinterval in the same level subinterval may all be down-regulated to accelerate the adjustment speed of the modulation coding mode.
And S304, if not, reducing the target modulation coding mode to a first initial modulation coding mode corresponding to the first actual SNR value.
Therefore, after a large SNR interval is divided into a plurality of small subintervals, the modulation and coding mode can be adjusted more pertinently, and meanwhile, the adjustment of one subinterval can be fed back to the specific same-level subinterval to influence the same adjustment of the same-level subintervals, so that the speed of adjusting the modulation and coding mode can be accelerated, and the capability of the wireless equipment for quickly corresponding wireless channel change is improved.
In the above embodiment, the updated initialization prior-check table is stored in the FPGA RAM, but data in the FPGA RAM will be lost after power failure, and in order to ensure that the last updated initialization prior-check table will not be lost after power failure of the device, the updated initialization prior-check table may be stored in the FPGA ROM, specifically:
and after updating the initialization look-ahead table, saving the updated initialization look-ahead table to the FPGA ROM.
According to the embodiment, the initialization look-ahead table is updated twice in the scheme, and the SNR look-ahead table is updated after the modulation mode corresponding to the actual SNR value is adjusted for the first time; and the second time, verifying the adjusted SNR prior table, and updating or restoring the adjusted SNR prior table again. There may therefore be two cases for the preservation of the look-ahead table:
the storage space of the FPGA ROM can be saved, the storage operation is reduced, the final prior test table can be stored to the FPGA ROM from the FPGA RAM after two updates are completed, and meanwhile, if the second update is a reduction, namely the second update is the prior test table before the first update, the result before the update can be stored only in the FPGA ROM. However, in order to prevent the device from being powered off in the two updating processes, the prior table in the FPGA RAM may be stored in the FPGA ROM after any updating in the initialization prior table.
The embodiment of the invention discloses a wireless communication equipment rate modulation device, and the wireless communication equipment rate modulation device and the wireless communication equipment rate modulation method described above can be referred to each other.
Referring to fig. 4, an apparatus for modulating a rate of a wireless communication device based on an adaptive learning mechanism according to an embodiment of the present invention includes:
an initialization prior table establishing module 401, configured to establish an initialization prior table, where the initialization prior table includes SNR threshold intervals, a first initial modulation and coding scheme corresponding to each SNR threshold interval, and an initial transmission success rate corresponding to each SNR threshold interval.
Specifically, in an ideal environment, the initialization prior table establishing module 401 determines an ideal SNR prior table as the initialization prior table, where the table includes SNR threshold values, a first initial modulation and coding scheme corresponding to each SNR threshold interval, and an initial transmission success rate corresponding to each SNR threshold interval, where one SNR threshold interval is between every two adjacent SNR threshold values.
An actual SNR value receiving module 402, configured to receive an actual SNR value, determine a target SNR threshold interval where the actual SNR value is located, and determine a target modulation and coding scheme corresponding to the actual SNR value by using the target SNR threshold interval.
Specifically, the actual SNR value receiving module 402 of the sender device obtains the actual SNR value reported by the receiver from the packet carrying the receiver signal strength value, finds out which two adjacent SNR threshold values the actual SNR value is between by initializing the priori table, that is, determines the SNR threshold interval where the actual SNR value is located, and then uses the corresponding first initial modulation and coding mode found by initializing the priori table as the target modulation and coding mode and the corresponding initial sending success rate.
It should be noted that, the first initial modulation and coding scheme and the actual success rate corresponding to the SNR threshold value in the SNR threshold interval are the same as the first initial modulation and coding scheme and the actual success rate corresponding to the first SNR threshold value in the interval. For example, if two adjacent SNR thresholds in table 1 are X, Y, the first initial modulation and coding scheme and the actual success rate corresponding to all SNR thresholds that do not include Y are between X, Y, and are the same as the first initial modulation and coding scheme and the actual success rate corresponding to X.
The actual sending success rate calculating module 403 is configured to send a data packet by using the target modulation coding scheme, and calculate a first actual sending success rate of the data packet.
After the actual SNR value receiving module 402 determines the target modulation coding mode of the actual SNR threshold value, the actual sending success rate calculating module 403 sends the data packet according to the modulation coding mode, and records the total sending frame number, the reserved channel failure frame number, and the successful sending frame number in the sending period in the sending window, so as to calculate the actual sending success rate as the first actual sending success rate.
A first determining module 404, configured to determine whether the first actual sending success rate is greater than or equal to an initial sending success rate corresponding to the target modulation and coding scheme, if so, invoke an up-adjusting module 405, and if not, invoke a down-adjusting module 406.
In the scheme, whether the first initial modulation and coding mode can reach an ideal success rate in an actual environment can be determined through comparison of success rates, that is, whether the first initial modulation and coding mode is an ideal modulation and coding mode in a current environment is determined.
Specifically, after the end of the sending window, the first determining module 404 determines whether the first actual sending success rate is greater than or equal to the initial sending success rate corresponding to the target modulation coding scheme, if so, the up-adjusting module 405 is called, and if not, the down-adjusting module 406 is called.
The up-regulation module 405 is configured to up-regulate the level of the target modulation and coding scheme, and update the initialization look-ahead table.
It should be noted that, when the first actual sending success rate is greater than or equal to the initial sending success rate corresponding to the target modulation and coding scheme, it indicates that the current modulation and coding scheme is of a lower grade, the up-regulation module 405 may up-regulate the current modulation and coding scheme by one grade, and update the regulation result to the initialized pre-check table after the regulation.
The down-regulation module 406 is configured to regulate the target to a coding mode level and to update the initialization look-ahead table.
It should be noted that, when the first actual sending success rate is less than the initial sending success rate corresponding to the target modulation and coding scheme, it indicates that the current modulation and coding scheme is higher in level, the current modulation and coding scheme may be adjusted down by one level, and the adjustment result is updated to the initialized pre-inspection table after adjustment.
In this scheme, updating the initialization look-ahead table may be completed by the up-regulation determining module 501, the first updating module 502, and the second updating module 503, specifically:
an up-regulation judging module 501, configured to judge whether to up-regulate the level of the target modulation and coding scheme.
A first updating module 502, configured to, after the level of the target modulation and coding scheme is adjusted up, use the adjusted target modulation and coding scheme as a second initial modulation and coding scheme of the target SNR threshold interval, and use the first actual success rate as an initial success rate of the target SNR threshold interval.
Specifically, if the target is adjusted to the coding scheme level and then is adjusted up, the first updating module 502 needs to update the SNR prior table, and needs to change the modulation coding scheme corresponding to the target SNR threshold interval and the corresponding success rate. Specifically, the target modulation coding mode after being up-regulated, that is, the second initial modulation coding mode, may be used as the first initial modulation coding mode of the target SNR threshold interval in the updated initial look-up table; and taking the first actual success rate as the initial success rate corresponding to the target SNR interval in the updated initialization look-up table.
A second updating module 503, configured to adjust the level of the target modulation and coding scheme downward, use the adjusted target modulation and coding scheme as a third initial modulation and coding scheme of the target SNR threshold interval, and use the first actual success rate as the initial success rate of the target SNR threshold interval.
Specifically, if the target is adjusted to the coding scheme level and then is adjusted, the second updating module 503 needs to update the SNR prior table, and needs to change the modulation coding scheme corresponding to the target SNR threshold interval and the corresponding success rate. Specifically, the down-adjusted target modulation coding mode, that is, the third initial modulation coding mode may be used as the first initial modulation coding mode of the target SNR threshold interval in the updated initial look-up table; and taking the first actual success rate as the initial success rate corresponding to the target SNR interval in the updated initialization look-up table.
Therefore, according to the method and the device for modulating the rate of the wireless communication equipment based on the adaptive learning mechanism provided by the embodiment of the invention, the initialization prior table is established through the initialization prior table establishing module 401, the modulation coding mode corresponding to the SNR value received by the actual SNR value receiving module 402 is found to transmit the message, the actual transmission success rate in the current environment is obtained, the actual success rate is compared with the initial success rate before the modulation coding mode in the initialization SNR prior table is adjusted through the first judging module 404, and the modulation coding mode is adjusted through the comparison result of the success rates to obtain the modulation coding mode adaptive to the current environment. Therefore, when the environments are different, the SNR prior table can be automatically updated, so that the communication equipment can obtain the corresponding SNR threshold value in each debugging mode, and the automatic updating of the SNR does not need a large amount of investment time and labor, is convenient to operate and is easy to realize.
The embodiment of the present invention provides a specific rate modulation method and apparatus for wireless communication equipment based on an adaptive learning mechanism, which is different from the previous embodiment, the embodiment of the present invention specifically defines the SNR threshold interval in the foregoing embodiment, and the contents of other steps are substantially the same as those in the previous embodiment, and the specific contents may refer to the previous embodiment, and are not described herein again. Specifically, the method comprises the following steps:
the SNR threshold interval includes at least one SNR threshold subinterval.
The SNR threshold subintervals are obtained by dividing the SNR threshold interval, the SNR threshold subintervals divided by the same SNR threshold interval are sibling subintervals, and the sibling subintervals correspond to the same first initial modulation coding mode and the same initial transmission success rate.
Specifically, the SNR threshold sub-interval may be used as the SNR threshold interval described in the above embodiment. The SNR threshold interval in the initialization look-ahead table established in the initialization look-ahead table establishing module 401 is replaced with SNR threshold subintervals divided by the SNR threshold interval.
It should be noted that the SNR threshold subinterval is obtained by cutting the interval between two adjacent SNR threshold values, that is, the interval between two adjacent SNR threshold values may be divided into a plurality of fine subintervals, and when the modulation and coding scheme corresponding to the interval is adjusted, the modulation and coding scheme level between the cells in the original large interval is also adjusted.
In the above embodiment, after a certain subinterval is adjusted according to a modulation and coding scheme, part of subintervals at the same level need to be adjusted similarly to the same subintervals, and therefore, in order to increase the adjustment speed of the modulation and coding scheme, embodiments of the present invention provide a method and an apparatus for rate modulation of a wireless communication device using a specific adaptive learning mechanism, and specifically, the apparatus further includes:
the second actual success rate calculating module 601 is configured to send the message data again by using the target modulation and coding scheme after the up-regulation, and calculate to obtain a second actual sending success rate.
It should be noted that the modulation and coding method is adjusted into two methods, i.e., up-regulation and down-regulation, and when the modulation and coding method is up-regulated, the second actual success rate for verification is calculated by the second actual success rate calculation module 601.
A second determining module 602, configured to determine whether the second actual sending success rate is greater than or equal to the first actual sending success rate, if so, invoke a peer modulation and coding mode up-regulation module, and if not, invoke a first restoring module.
It should be noted that, after the modulation and coding scheme is adjusted, the second determining module 602 needs to verify the adjustment result. In this scheme, two scenarios are verified.
In scenario one, a priori table adapted to the current environment needs to be determined in time, the result can be immediately tested by the second determining module 602 after updating, a test packet data is tried to be sent by using the up-adjusted target modulation and coding method, the test success rate is obtained and is used as a second actual sending success rate, and whether the second actual sending success rate is greater than or equal to the first actual sending success rate is determined.
In a second scenario, if a prior table adapted to the current environment does not need to be determined immediately, in order to reduce unnecessary message data transmission operations, when next communication is performed, after a next sending window is finished, an actual sending success rate of next message data may be obtained and used as a second sending success rate, and the second determining module 602 determines whether the second actual sending success rate is greater than or equal to the first actual sending success rate.
The peer modulation and coding scheme up-regulating module 603 is configured to up-regulate all the levels of the first initial modulation and coding schemes corresponding to peer subintervals greater than the target SNR threshold subinterval.
If the second actual sending success rate is greater than or equal to the first actual sending success rate, it indicates that the modulation is successfully adjusted, and the modulation modes corresponding to the target SNR threshold subinterval in the same-level subinterval may all be adjusted by the same-level modulation coding mode up-adjustment module 603, so as to accelerate the adjustment speed of the modulation coding mode.
In the initialization look-up table, the subintervals corresponding to the same modulation and coding scheme and the same success rate are the same-level subintervals.
The first restoring module 604 is configured to restore the target modulation and coding scheme to a first initial modulation and coding scheme corresponding to the first actual SNR value.
If the second actual sending success rate is smaller than the first actual sending success rate, it indicates that the up-regulation fails, and the first restoring module 604 is required to restore the up-regulated modulation and coding scheme level to the modulation and coding scheme level before the up-regulation.
And a third actual success rate calculating module 701, configured to send the message data again by using the down-regulated target modulation coding scheme, and calculate to obtain a third actual sending success rate.
It should be noted that, when the modulation and coding scheme is adjusted to be down-regulated, a third actual success rate for checking whether the down-regulation is successful is calculated by the third actual success rate calculation module 701.
A third determining module 702, configured to determine whether the third actual sending success rate is smaller than the first actual sending success rate, if so, invoke a peer modulation and coding mode down-regulation module, and if not, invoke a second restoring module 704.
It should be noted that, after the modulation and coding scheme level is adjusted downward, the adjustment result also needs to be verified. If a prior table adapted to the current environment needs to be determined in time, the result can be immediately tested after updating, a target modulation coding party after down regulation tries to send a test message data, the test success rate is obtained and is used as a third actual sending success rate, and a third judging module 702 judges whether the third actual sending success rate is smaller than the first actual sending success rate; if the prior table adapted to the current environment does not need to be determined immediately, in order to reduce unnecessary message data transmission operations, the actual sending success rate of the next message data can be obtained and used as the third sending success rate after the next sending window is finished in the next communication, and the third determining module 702 determines whether the third actual sending success rate is greater than or equal to the first actual sending success rate.
The peer modulation coding scheme down-regulating module 703 is configured to down-regulate all the levels of the first initial modulation coding schemes corresponding to peer subintervals smaller than the target SNR threshold subinterval.
It should be noted that if the third actual sending success rate is smaller than the first actual sending success rate, it indicates that the down-regulation is successful, and the peer modulation coding mode down-regulation module 703 may down-regulate all modulation modes corresponding to the target SNR threshold subinterval in the peer subinterval to accelerate the adjustment speed of the modulation coding mode.
The second restoring module 704 is configured to restore the target modulation coding scheme to the first initial modulation coding scheme corresponding to the first actual SNR value.
If the down-regulation fails, that is, the third actual sending success rate is not less than the first actual sending success rate, the down-regulated modulation and coding scheme level is reduced to the modulation and coding scheme level before the down-regulation by the second reducing module 704.
Therefore, after a large SNR interval is divided into a plurality of small subintervals, the modulation and coding mode can be adjusted more pertinently, and meanwhile, the adjustment of one subinterval can be fed back to the specific same-level subinterval to influence the same adjustment of the same-level subintervals, so that the speed of adjusting the modulation and coding mode can be accelerated, and the capability of the wireless equipment for quickly corresponding wireless channel change is improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method for rate modulation of a wireless communication device based on an adaptive learning mechanism, comprising:
establishing an initialization look-ahead table, wherein the initialization look-ahead table comprises SNR threshold intervals, a first initial modulation coding mode corresponding to each SNR threshold interval and an initial sending success rate corresponding to each SNR threshold interval;
receiving an actual SNR value, determining a target SNR threshold interval where the actual SNR value is located, and determining a target modulation coding mode corresponding to the actual SNR value by using the target SNR threshold interval;
transmitting a data message by using the target modulation coding mode, and calculating a first actual transmission success rate of the data message;
judging whether the first actual sending success rate is greater than or equal to the initial sending success rate corresponding to the target modulation coding mode;
if so, the grade of the target modulation coding mode is adjusted upwards, and the initialization look-ahead table is updated;
if not, adjusting the target to the level of a coding mode to be adjusted downwards, and updating the initialization look-ahead table;
wherein the updating the initialization look-ahead table comprises:
judging whether the grade of the target modulation coding mode is adjusted upwards or not; if so, taking the target modulation coding mode after being adjusted as a second initial modulation coding mode of the target SNR threshold interval, and taking the first actual success rate as the initial success rate of the target SNR threshold interval; if not, the target modulation coding mode after the down regulation is used as a third initial modulation coding mode of the target SNR threshold interval, and the first actual success rate is used as the initial success rate of the target SNR threshold interval.
2. The wireless communication device rate modulation method of claim 1, wherein the SNR threshold interval comprises at least one SNR threshold subinterval;
the SNR threshold subintervals are obtained by dividing the SNR threshold interval, the SNR threshold subintervals divided by the same SNR threshold interval are sibling subintervals, and the sibling subintervals correspond to the same first initial modulation coding mode and the same initial transmission success rate.
3. The method of claim 2, wherein if the first actual transmission success rate is greater than or equal to the initial transmission success rate corresponding to the target modulation and coding scheme, then updating the initialization look-up table, and further comprising:
sending the message data again by using the adjusted target modulation coding mode, and calculating to obtain a second actual sending success rate;
judging whether the second actual sending success rate is greater than or equal to the first actual sending success rate or not;
if yes, the grades of the first initial modulation coding modes corresponding to the same level subintervals larger than the target SNR threshold subintervals are all adjusted upwards;
if not, the target modulation coding mode is restored to the first initial modulation coding mode corresponding to the first actual SNR value.
4. The method of claim 2, wherein if the first actual transmission success rate is less than the initial transmission success rate corresponding to the target modulation coding scheme, then updating the initialization look-ahead table, further comprising:
sending the message data again by using the down-regulated target modulation coding mode, and calculating to obtain a third actual sending success rate;
judging whether the third actual sending success rate is smaller than the first actual sending success rate;
if yes, the grades of the first initial modulation coding modes corresponding to the same level subintervals smaller than the target SNR threshold subintervals are all adjusted downwards;
if not, the target modulation coding mode is restored to the first initial modulation coding mode corresponding to the first actual SNR value.
5. The method of any of claims 1-4, wherein after updating the initialization look-up table, further comprising:
and storing the updated initialization look-ahead table to the FPGA ROM.
6. An apparatus for modulating a rate of a wireless communication device based on an adaptive learning mechanism, comprising:
the device comprises an initialization look-ahead table establishing module, a first transmission success rate determining module and a second transmission success rate determining module, wherein the initialization look-ahead table establishing module is used for establishing an initialization look-ahead table, and the initialization look-ahead table comprises SNR threshold intervals, a first initial modulation coding mode corresponding to each SNR threshold interval and an initial transmission success rate corresponding to each SNR threshold interval;
an actual SNR value receiving module, configured to receive an actual SNR value, determine a target SNR threshold interval where the actual SNR value is located, and determine a target modulation and coding scheme corresponding to the actual SNR value by using the target SNR threshold interval;
the actual sending success rate calculation module is used for sending a data message by using the target modulation coding mode and calculating a first actual sending success rate of the data message;
the first judgment module is used for judging whether the first actual transmission success rate is greater than or equal to the initial transmission success rate corresponding to the target modulation coding mode, if so, the up-regulation module is called, and if not, the down-regulation module is called;
the up-regulation module is used for up-regulating the grade of the target modulation coding mode and updating the initialization look-ahead table;
the down-regulation module is used for regulating the target to the coding mode level for down-regulation and updating the initialization look-ahead table;
wherein the process of the device updating the initialization look-ahead table comprises:
judging whether the grade of the target modulation coding mode is adjusted upwards or not; if so, taking the target modulation coding mode after being adjusted as a second initial modulation coding mode of the target SNR threshold interval, and taking the first actual success rate as the initial success rate of the target SNR threshold interval; if not, the target modulation coding mode after the down regulation is used as a third initial modulation coding mode of the target SNR threshold interval, and the first actual success rate is used as the initial success rate of the target SNR threshold interval.
7. The wireless communication device rate modulation apparatus of claim 6, wherein the SNR threshold interval comprises at least one SNR threshold subinterval;
the SNR threshold subintervals are obtained by dividing the SNR threshold interval, the SNR threshold subintervals divided by the same SNR threshold interval are sibling subintervals, and the sibling subintervals correspond to the same first initial modulation coding mode and the same initial transmission success rate.
8. The apparatus for rate modulation for a wireless communication device of claim 7, further comprising:
the second actual success rate calculation module is used for retransmitting the message data by utilizing the target modulation coding mode after being adjusted upwards and calculating to obtain a second actual transmission success rate;
the second judgment module is used for judging whether the second actual sending success rate is greater than or equal to the first actual sending success rate, if so, the same level modulation coding mode up-regulation module is called, and if not, the first restoration module is called;
the peer modulation coding mode up-regulation module is used for up-regulating the grades of first initial modulation coding modes corresponding to peer subintervals larger than the target SNR threshold subinterval;
the first restoring module is configured to restore the target modulation coding scheme to a first initial modulation coding scheme corresponding to the first actual SNR value.
9. The apparatus for rate modulation for a wireless communication device of claim 7, further comprising:
the third actual success rate calculation module is used for retransmitting the message data by using the down-regulated target modulation coding mode and calculating to obtain a third actual transmission success rate;
a third judging module, configured to judge whether the third actual sending success rate is smaller than the first actual sending success rate, if so, invoke a peer modulation and coding mode down-regulation module, and if not, invoke a second restoring module;
the peer modulation coding mode down-regulation module is used for down-regulating the grades of first initial modulation coding modes corresponding to peer subintervals smaller than the target SNR threshold subinterval;
the second restoring module is configured to restore the target modulation coding scheme to a first initial modulation coding scheme corresponding to the first actual SNR value.
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