A channel selection method for power line carrier communication

Abstract

The present invention relates to the field of carrier communication, and in particular to a channel selection method for power line carrier communication, comprising: determining a relay area division method according to the number of relay points and the relay point distribution coefficient, the relay area division method is to divide according to a distance reference value and a preset condition, or, the radiation area corresponding to the relay point is recorded as the relay area; the relay radiation value is determined according to the sum of the areas of the overlapping areas corresponding to the relay areas; the data state is determined according to a channel influence coefficient and a data evaluation coefficient, and the channel selection method is determined according to the data state, the channel selection method is to determine a transmission combination according to a preset selection method and determine a selection optimization method according to the relay radiation value and data sensitivity, or, the transmission channel is determined according to a transmission difficulty threshold. The present invention can ensure the quality of carrier communication and can reduce the safety hazards of communication data transmission.

Description

Technical Field

[0001] The present invention relates to the field of carrier communication, and in particular to a channel selection method for power line carrier communication. Background Art

[0002] With the continuous development of power line carrier communication technology, people's demand for power line carrier communication technology is also increasing. However, since a large number of load devices are connected to the power line, and the random access and removal of the load devices will affect the resistance, inductance and other parameters of the power line, due to the randomness of the access and removal of the load devices, when selecting the communication channel, the selected communication channel may have defects such as channel instability, severe electromagnetic interference, and communication delay, which seriously affect the communication quality. Therefore, how to select a suitable channel for transmission of communication data to ensure communication quality is a problem that technicians in this field need to solve urgently.

[0003] Chinese patent publication number CN107682047A discloses a channel-aware medium-voltage power line communication data transmission method, including: 1) in each transmission cycle, obtaining data information of the medium-voltage power line communication channel status of the specified N transmission cycles before the current transmission cycle, the data information of the medium-voltage power line communication channel status includes multiple state parameters; 2) comprehensively calculating the medium-voltage power line communication channel quality evaluation parameters of the current transmission cycle using the multiple state parameters of the data information of the medium-voltage power line communication channel status; 3) selecting the data transmission modulation mode of the current transmission cycle according to the channel quality evaluation parameters; 4) performing data transmission operations according to the selected data transmission modulation mode. It can be seen that the above technical solution has the following problems: the transmission mode is selected only based on the historical data information of the channel, and it is impossible to adaptively optimize the transmission channel and the transmission mode according to the actual load equipment access situation, and it is impossible to guarantee the carrier communication quality, resulting in greater hidden dangers in communication data transmission. Summary of the invention

[0004] To this end, the present invention provides a channel selection method for power line carrier communication to overcome the problem in the prior art that the transmission channel and transmission mode cannot be adaptively optimized according to the actual load device access situation, resulting in greater hidden dangers in communication data transmission.

[0005] To achieve the above object, the present invention provides a channel selection method for power line carrier communication, comprising:

[0006] Determine the relay area division method according to the number of relay points and the relay point distribution coefficient. The relay area division method is to divide according to the distance reference value and the preset conditions, or record the radiation area corresponding to the relay point as the relay area;

[0007] Determine the device association coefficient determination method according to the number of connected devices. The device association coefficient determination method is to determine the device association coefficient according to the start-stop difference or the interval start-stop coefficient;

[0008] The preset condition is determined according to the device association coefficient, and the preset condition is that the relay point difference is less than the preset relay point difference or the transmission coefficient is greater than the preset transmission coefficient;

[0009] Determine the relay radiation value according to the sum of the areas of the overlapping areas corresponding to each relay area;

[0010] The data status is determined according to the channel influence coefficient and the data evaluation coefficient, and the channel selection method is determined according to the data status. The channel selection method is to determine the transmission combination according to the preset selection method and determine the selection optimization method according to the relay radiation value and the data sensitivity, or determine the transmission channel according to the transmission difficulty threshold;

[0011] The optimization method is to select a transmission channel according to a channel correlation degree and a combined correlation degree or to select a transmission channel according to a channel influence value.

[0012] Further, the relay area division method is determined according to the number of relay points and the relay point distribution coefficient;

[0013] If the number of relay points is greater than or equal to the preset number of relay points or the relay point distribution coefficient is less than the preset relay point distribution coefficient, the relay area is divided according to the distance reference value and the preset conditions;

[0014] If the number of relay points is less than the preset number of relay points and the relay point distribution coefficient is greater than or equal to the preset relay point distribution coefficient, the relay area division method is to record the radiation area corresponding to the relay point as the relay area.

[0015] Further, the classification is performed according to the distance reference value and the preset conditions, wherein:

[0016] Performing a division analysis on each relay point, when performing a division analysis on a single relay point, record the relay point as the target relay point, and record other relay points other than the target relay point that are not recorded in the similarity set as reference relay points;

[0017] Recording a set of reference relay points and target relay points whose distance reference values ​​to the target relay point are less than a preset distance reference value and satisfy preset conditions as a similar set;

[0018] And continue to divide and analyze the relay points that are not recorded in the similarity set until all relay points are recorded in the similarity set;

[0019] The minimum area that can contain the radiation areas corresponding to the relay points in a single similarity set is recorded as a relay area;

[0020] The preset condition is determined according to the equipment association coefficient;

[0021] If the device association coefficient is greater than or equal to the preset device association coefficient, the preset condition is that the relay point difference is less than the preset relay point difference;

[0022] If the device association coefficient is less than the preset device association coefficient, the preset condition is that the transmission coefficient is greater than the preset transmission coefficient.

[0023] Furthermore, the data status includes:

[0024] A first data state in which a channel influence coefficient is greater than or equal to a preset channel influence coefficient or a data evaluation coefficient is greater than or equal to a preset data evaluation coefficient;

[0025] A second data state in which the channel influence coefficient is less than a preset channel influence coefficient and the data evaluation coefficient is less than a preset data evaluation coefficient.

[0026] Further, determining a channel selection mode according to the data state;

[0027] In the first data state, the channel selection method is to determine the transmission combination according to the preset selection method, and determine the selection optimization method according to the relay radiation value and data sensitivity;

[0028] In the second data state, the channel selection method is to determine the transmission channel according to the transmission difficulty threshold, wherein the to-be-transmitted channel with the smallest transmission difficulty threshold is used as the transmission channel for each communication data.

[0029] Further, the transmission combination is determined according to a preset selection method, wherein:

[0030] Performing combined analysis on each communication data, when performing combined analysis on a single communication data, recording the communication data as target communication data, recording communication data other than the target communication data and not recorded in the transmission combination as reference communication data, and recording a sequence after sorting the reference communication data in descending order of data reference values ​​as a reference sequence;

[0031] Recording the target communication data and a preset number of reference communication data selected in a preset selection method into a transmission combination, and continuing to perform combination analysis on the communication data not recorded in the transmission combination until all the communication data are recorded in the transmission combination;

[0032] The preset number is positively correlated with the comprehensive evaluation value.

[0033] Further, the preset selection method is determined according to the data relevance and data sensitivity;

[0034] If the data correlation is less than the preset data correlation or the data sensitivity is greater than or equal to the preset data sensitivity, the preset selection method is to select the same number of communication data at both ends of the reference sequence;

[0035] If the data correlation degree is greater than or equal to the preset data correlation degree and the data sensitivity is less than the preset data sensitivity, the preset selection method is to select the communication data in the reference sequence in descending order of correlation influence values.

[0036] Further, the optimization method is selected according to the relay radiation value and the data sensitivity;

[0037] If the relay radiation value is greater than or equal to the preset relay radiation value or the data sensitivity is greater than or equal to the preset data sensitivity, the optimization method is to select a transmission channel according to the channel correlation and the combination correlation;

[0038] If the relay radiation value is less than the preset relay radiation value and the data sensitivity is less than the preset data sensitivity, the optimization method is to select the transmission channel according to the channel impact value. When selecting the transmission channel for a single transmission combination, the transmission combination is recorded as the first target transmission combination, and the to-be-transmitted channel with the smallest channel impact value and no assigned transmission combination is used as the transmission channel corresponding to the first target transmission combination.

[0039] Further, a transmission channel is selected according to the channel correlation and the combined correlation, wherein:

[0040] When selecting a transmission channel for a single transmission combination, the transmission combination is recorded as a second target transmission combination, and a transmission channel corresponding to an allocated transmission combination whose combination correlation with the second target transmission combination is greater than a preset combination correlation is recorded as an impact channel;

[0041] The to-be-transmitted channel that has the smallest channel correlation with each influencing channel and is not assigned a transmission combination is used as the transmission channel corresponding to the second target transmission combination.

[0042] Further, a device association coefficient determination method is determined according to the number of access devices;

[0043] If the number of connected devices is less than the preset number of connected devices, the device association coefficient is determined according to the start-stop difference, wherein the device association coefficient is negatively correlated with the start-stop difference;

[0044] If the number of connected devices is greater than or equal to the preset number of connected devices, the device association coefficient is determined according to the interval start-stop coefficient, where the device association coefficient is the average value of the interval start-stop coefficients corresponding to each device combination.

[0045] Compared with the prior art, the beneficial effect of the present invention lies in that, in the technical scheme of the present invention, the data state is determined according to the channel influence coefficient and the data evaluation coefficient, and the channel influence coefficient and the data evaluation coefficient are used to effectively reflect the influence of the access load device on the transmission channel and the sensitivity of the communication data, and then different channel selection methods are adaptively selected according to the data state, so that the channel selection method is more in line with the actual application scenario, reducing the influence of random access and removal of power line load devices on the power line communication quality, and also reducing the risk of data leakage of highly sensitive communication data during the data transmission process, thereby ensuring the carrier communication quality and reducing the security risks of communication data transmission.

[0046] Furthermore, the present invention effectively reflects the coverage of relay points and the sensitivity of data through relay radiation value and data sensitivity, and then adaptively selects different selection optimization methods according to the relay radiation value and data sensitivity, so that the selection of the optimization method is more in line with the actual application scenario, reducing the defects of increased communication delay and complexity caused by redundant communication paths due to high degree of relay point overlap, and also reducing the risk of data leakage of highly sensitive communication data during data transmission, thereby improving the carrier communication quality.

[0047] Furthermore, in the present invention, the redundancy of the relay point setting is effectively reflected by the number of relay points and the relay point distribution coefficient, and then different relay area division methods are adaptively selected according to the number of relay points and the relay point distribution coefficient, so that the selection of the relay area division method is more in line with the actual application scenario, and the defect of large redundancy of communication paths caused by large overlap of relay areas is reduced, making the division of relay areas more reasonable. Dividing the relay areas is conducive to reducing problems such as signal attenuation, interference and noise, and can improve the accuracy of communication data transmission, thereby reducing communication failures and bit error rates.

[0048] Furthermore, in the present invention, preset conditions are determined according to the device association coefficient, and the device association coefficient effectively reflects the degree of association of access devices in the radiation area corresponding to the relay point, and then different preset conditions are selected according to the device association coefficient, so that the selection of preset conditions is more in line with the actual application scenario, avoiding the problem of unreasonable division of relay areas due to a single preset condition setting, and improving the transmission efficiency of communication data.

[0049] Furthermore, in the present invention, a method for determining a device association coefficient is determined according to the number of access devices, and the number of access devices is used to effectively reflect the complexity of the access devices, and then different methods for determining device association coefficients are adaptively selected, so that the method for determining device association coefficients is more in line with actual application scenarios, and can accurately reflect the association relationship between devices, which is conducive to the subsequent selection of different preset conditions, making the division of relay areas more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic diagram of a channel selection method for power line carrier communication of the present invention;

[0051] Figure 2 A flow chart of determining a relay area division method according to the number of relay points and relay point distribution coefficients of the present invention;

[0052] Figure 3 A flow chart of determining a channel selection method according to a data state according to the present invention;

[0053] Figure 4 The present invention is a flow chart for determining and selecting an optimization method according to relay radiation value and data sensitivity. DETAILED DESCRIPTION

[0054] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0055] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0056] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0057] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] See also Figures 1 to 4 As shown, the present invention provides a channel selection method for power line carrier communication, comprising:

[0059] Determine the relay area division method according to the number of relay points and the relay point distribution coefficient. The relay area division method is to divide according to the distance reference value and the preset conditions, or record the radiation area corresponding to the relay point as the relay area;

[0060] Determine the device association coefficient determination method according to the number of connected devices. The device association coefficient determination method is to determine the device association coefficient according to the start-stop difference or the interval start-stop coefficient;

[0061] The preset condition is determined according to the device association coefficient, and the preset condition is that the relay point difference is less than the preset relay point difference or the transmission coefficient is greater than the preset transmission coefficient;

[0062] Determine the relay radiation value according to the sum of the areas of the overlapping areas corresponding to each relay area;

[0063] The data status is determined according to the channel influence coefficient and the data evaluation coefficient, and the channel selection method is determined according to the data status. The channel selection method is to determine the transmission combination according to the preset selection method and determine the selection optimization method according to the relay radiation value and the data sensitivity, or determine the transmission channel according to the transmission difficulty threshold;

[0064] The optimization method is to select a transmission channel according to a channel correlation degree and a combined correlation degree or to select a transmission channel according to a channel influence value.

[0065] The application scenario of the present invention is the selection of channels for data transmission in power line carrier communication. Single communication data is a single parameter monitored in real time with the use time in a single monitoring cycle. The parameters include but are not limited to temperature, humidity, vibration intensity and voltage. This is easy for technical personnel in this field to understand and will not be described in detail. The channel to be transmitted is a transmission path for transmitting communication data to a terminal device using the power line as the transmission medium. The terminal device can receive the communication data for real-time viewing and storage by monitoring personnel for fault detection. There are several channels to be transmitted for transmitting the communication data to the terminal device. The load device connected to the power line corresponding to the channel to be transmitted in the present invention includes an access load device and a cut-off load device. The access load device is the current monitoring The load devices that are running within the cycle, the load devices that are cut off are the load devices that are not running within the current monitoring cycle, and the load devices include but are not limited to computers, smart appliances, sensors and cameras; each transmission channel contains a number of relay points, and the relay point is a forwarding node that can receive, process and forward communication data. The forwarding nodes include but are not limited to switches, routers and servers. Each relay point corresponds to a radiation area, and the radiation area is a circular area with the relay point as the center and the communication length as the radius. For a single relay point, the relay point is recorded as the target relay point, and the communication length corresponding to the target relay point is positively correlated with the power of the forwarding node corresponding to the target relay point. This is content that is easy for technical personnel in this field to understand and will not be elaborated in detail.

[0066] The present invention is provided with a continuously cyclic monitoring cycle, and the data status is determined once at the end of each monitoring cycle. The duration of the monitoring cycle can be set according to the needs of the user. The greater the user's demand for monitoring accuracy, the shorter the duration of the monitoring cycle. A value of the monitoring cycle is provided, and the monitoring cycle is 1 minute.

[0067] In the present invention, several historical records are correspondingly provided, and any historical record records the channel influence coefficient, data evaluation coefficient, number of relay points, relay point distribution coefficient, relay point difference, equipment association coefficient and relay radiation value, etc. in the historical process of channel selection of communication data in power line carrier communication at least once, and each historical record corresponds to a qualified mark, which records whether the communication data transmission effect meets user requirements, and the qualified mark can be recorded manually.

[0068] The present invention applies a deep learning network, which includes but is not limited to a feedforward neural network, a convolutional neural network, and a recurrent neural network. Users can choose according to actual needs, and then perform deep learning based on historical records to obtain the influence of different parameters on the difficulty of channel transmission and the sensitivity of communication data transmission. This is content that is easy for technicians in this field to understand and will not be elaborated on in detail.

[0069] The relay radiation value is the sum of the areas of the overlapping areas corresponding to the relay areas. The overlapping area is confirmed by recording a relay area as the target relay area and recording the overlapping area between the target relay area and other relay areas as the overlapping area corresponding to the target relay area.

[0070] Specifically, the relay area division method is determined based on the number of relay points and the relay point distribution coefficient;

[0071] If the number of relay points is greater than or equal to the preset number of relay points or the relay point distribution coefficient is less than the preset relay point distribution coefficient, the relay area is divided according to the distance reference value and the preset conditions;

[0072] If the number of relay points is less than the preset number of relay points and the relay point distribution coefficient is greater than or equal to the preset relay point distribution coefficient, the relay area division method is to record the radiation area corresponding to the relay point as the relay area.

[0073] Among them, the number of relay points is the total number of relay points in each channel to be transmitted; the relay point distribution coefficient is the average value of the reference minimum distance corresponding to each relay point. For a single relay point, the relay point is recorded as the target relay point, and the other relay points other than the target relay point are recorded as reference relay points. The shortest distance from the target relay point to each reference relay point is detected, and the minimum value of each shortest distance is recorded as the reference minimum distance corresponding to the target relay point;

[0074] The values ​​of the preset number of relay points and the preset relay point distribution coefficient can be determined by the user according to the actual application scenario. The smaller the value of the preset number of relay points, the larger the value of the preset relay point distribution coefficient, and the greater the user's need to divide the area according to the distance reference value and the preset conditions. A value of the preset number of relay points and the preset relay point distribution coefficient is provided, and the radiation area corresponding to the relay point is detected and recorded as the historical record of the relay area, and the average value of the number of relay points corresponding to the historical records that can meet the user's needs is recorded as the preset number of relay points, and the average value of the relay point distribution coefficient corresponding to the historical records that can meet the user's needs is recorded as the preset relay point distribution coefficient.

[0075] Specifically, the classification is carried out according to the distance reference value and the preset conditions, among which,

[0076] Performing a division analysis on each relay point, when performing a division analysis on a single relay point, record the relay point as the target relay point, and record other relay points other than the target relay point that are not recorded in the similarity set as reference relay points;

[0077] Recording a set of reference relay points and target relay points whose distance reference values ​​to the target relay point are less than a preset distance reference value and satisfy preset conditions as a similar set;

[0078] And continue to divide and analyze the relay points that are not recorded in the similarity set until all relay points are recorded in the similarity set;

[0079] The minimum area that can contain the radiation areas corresponding to the relay points in a single similarity set is recorded as a relay area;

[0080] The preset condition is determined according to the equipment association coefficient;

[0081] If the device association coefficient is greater than or equal to the preset device association coefficient, the preset condition is that the relay point difference is less than the preset relay point difference;

[0082] If the device association coefficient is less than the preset device association coefficient, the preset condition is that the transmission coefficient is greater than the preset transmission coefficient.

[0083] Among them, the distance reference value is the shortest distance between two relay points. The method for confirming the difference of relay points is that, for any two relay points, the larger value of the load coefficients corresponding to the two relay points is recorded as A, and the smaller value of the load coefficients corresponding to the two relay points is recorded as B. The difference of relay points = (AB) / A; the method for confirming the load coefficient is that, for a single relay point, the relay point is recorded as the target relay point. The load coefficient corresponding to the target relay point = the maximum number difference + the maximum power difference. The method for confirming the maximum number difference and the maximum power difference is to record the radiation area corresponding to the target relay point as the target area, detect the number of radiation devices and the radiation power corresponding to each monitoring point in the current monitoring period, the maximum number difference = the maximum value of each radiation device number - the minimum value of each radiation device number, the maximum power difference = the maximum value of each radiation power - the minimum value of each radiation power, the number of radiation devices is the number of access load devices in the target area of ​​a single monitoring point, and the radiation power is the sum of the powers of the access load devices in the target area of ​​a single monitoring point;

[0084] The transmission coefficient is confirmed in the following way: for any two relay points, they are respectively recorded as the first relay point and the second relay point, the shortest power line path from the first relay point to the second relay point is recorded as the reference path, and each power line section corresponding to the reference path is recorded as the reference section. The transmission coefficient of the first relay point = the average value of the influence coefficients corresponding to each reference section - the length of the reference path. The transmission coefficient of the second relay point is the same as the transmission coefficient of the first relay point. The power line section is a section of power line where the voltage and current remain unchanged on a section of power line. The influence coefficient is confirmed in the following way: for a single reference section, the reference section is recorded as the target reference section. The influence coefficient corresponding to the target reference section = (power line cross-sectional area of ​​the target reference section × current of the target reference section) / (voltage of the target reference section × length of the target reference section);

[0085] The user can determine the values ​​of the preset distance reference value, the preset relay point difference, the preset transmission coefficient and the preset device association coefficient according to the actual application scenario. The smaller the value of the preset distance reference value, the more effective the user's division of the relay area is. A value of the preset distance reference value is provided, and the preset distance reference value is 10m. The historical records divided according to the distance reference value and the preset conditions are detected, and the average value of the relay point difference corresponding to the historical records that can meet the user's needs is recorded as the preset relay point difference, and the average value of the transmission coefficient corresponding to the historical records that can meet the user's needs is recorded as the preset transmission coefficient; it can be understood that the larger the value of the preset device association coefficient, the greater the user's demand for selecting the preset condition that the transmission coefficient is greater than the preset transmission coefficient. A value of the preset device association coefficient is provided, and the historical records whose preset condition is that the relay point difference is less than the preset relay point difference are detected, and the average value of the device association coefficient corresponding to the historical records that can meet the user's needs is recorded as the preset device association coefficient.

[0086] Specifically, the data status includes:

[0087] A first data state in which a channel influence coefficient is greater than or equal to a preset channel influence coefficient or a data evaluation coefficient is greater than or equal to a preset data evaluation coefficient;

[0088] A second data state in which the channel influence coefficient is less than a preset channel influence coefficient and the data evaluation coefficient is less than a preset data evaluation coefficient.

[0089] Among them, channel influence coefficient = (fluctuation mean × fluctuation coefficient) + (distance mean × distance coefficient), fluctuation mean = load quantity fluctuation mean + load power fluctuation mean, load quantity fluctuation mean is the average value of load quantity fluctuation values ​​corresponding to each channel to be transmitted in the current monitoring period, load quantity fluctuation value is the standard deviation of the number of connected load devices corresponding to each monitoring point of a single channel to be transmitted in the current monitoring period, the number of connected load devices is the total number of connected load devices connected to the power line corresponding to a single channel to be transmitted, and the load power fluctuation mean is the average value of the load power fluctuation values ​​corresponding to each channel to be transmitted in the current monitoring period. The load power fluctuation value is the standard deviation of the power of the access load device corresponding to each monitoring point of a single channel to be transmitted in the current monitoring period. The power of the access load device is the sum of the power corresponding to each access load device connected to the power line corresponding to a single channel to be transmitted. The monitoring point is set by the user. A method for setting the monitoring point is provided. The start time of the current monitoring period is recorded as a monitoring point. In order from early to late, each 1s is recorded as a monitoring point, that is, the number of access load devices and the power of the access load devices are recorded once every 1s. The distance mean is the average value of the length of the power line corresponding to each channel to be transmitted.

[0090] The values ​​of the fluctuation coefficient and the distance coefficient can be obtained by the user through deep learning convolutional neural network learning for historical records. It can be understood that the present invention reflects the transmission difficulty of the channel through the fluctuation mean and the distance mean. The user can use deep learning to obtain the influence of the fluctuation mean and the distance mean on the channel transmission difficulty according to the historical records, and then select the values ​​of the fluctuation coefficient and the distance coefficient according to the influence on the channel transmission difficulty. The larger the values ​​of the fluctuation coefficient and the distance coefficient, the greater the influence on the channel transmission difficulty. Among them, the fluctuation coefficient + distance coefficient = 1, and a value of the fluctuation coefficient and the distance coefficient is provided, the fluctuation coefficient is 0.6, and the distance coefficient is 0.4;

[0091] Data evaluation coefficient = data sensitivity × first coefficient + data correlation × second coefficient, data sensitivity is the average value of sensitivity coefficients corresponding to each communication data, and the confirmation method of the sensitivity coefficient is, for a communication data, the communication data is recorded as the target communication data, and the other communication data other than the target communication data is recorded as the reference communication data, and the correlation value corresponding to the target communication data and each reference communication data is detected, and the number of reference communication data with correlation values ​​greater than the preset correlation value is recorded as the sensitivity coefficient corresponding to the target communication data; the value of the preset correlation value can be determined by the user according to the actual application scenario, and the greater the user's demand for the stability of communication data transmission, the smaller the value of the preset correlation value is, and a value of a preset correlation value is provided, and the preset correlation value is 0.5; the data correlation is the average value of the correlation reference value corresponding to each communication data, and the confirmation method of the correlation reference value is, for a single communication data, the communication data is recorded as the target communication data, and the other communication data other than the target communication data is recorded as the reference communication data, and the correlation value of the target communication data and each reference data is detected, and the minimum value among the correlation values ​​is recorded as the correlation reference value corresponding to the target communication data;

[0092] For any two communication data, the calculation formula of the correlation value σ corresponding to the two communication data is:

[0093]

[0094] The time point corresponding to the starting data of a single communication data is taken as the starting point, and an interval point is set every 1s in time sequence. The starting point and all interval points are recorded as time points, and g is the number of time points in a single communication data; and are the values ​​of the monitoring data corresponding to the kth time point in the two communication data, for The average value of each monitoring data in the corresponding communication data, for The average value of each monitoring data in the corresponding communication data, k = 1, 2, 3, ..., g;

[0095] The values ​​of the first coefficient and the second coefficient can be obtained by the user through deep learning convolutional neural network learning for historical records. It can be understood that the present invention reflects the sensitivity of communication data transmission through data sensitivity and data correlation. The user can use deep learning to obtain the influence of connection data sensitivity and data correlation on the sensitivity of communication data transmission according to historical records, and then select the values ​​of the first coefficient and the second coefficient accordingly. The larger the values ​​of the first coefficient and the second coefficient, the greater the influence on the sensitivity of communication data transmission. Among them, the first coefficient + the second coefficient = 1, and a value of the first coefficient and the second coefficient is provided, the first coefficient is 0.5, and the second coefficient is 0.5;

[0096] The values ​​of the preset channel influence coefficient and the preset data evaluation coefficient can be determined by the user according to the actual application scenario. The larger the values ​​of the preset channel influence coefficient and the preset data evaluation coefficient are, the greater the user's demand for determining the transmission channel according to the transmission difficulty threshold. A value of the preset channel influence coefficient and the preset data evaluation coefficient is provided, and the historical records of determining the transmission channel according to the transmission difficulty threshold are detected. The average value of the channel influence coefficient corresponding to the historical records that can meet the user's needs is recorded as the preset channel influence coefficient, and the average value of the data evaluation coefficient corresponding to the historical records that can meet the user's needs is recorded as the preset data evaluation coefficient.

[0097] Specifically, the channel selection mode is determined according to the data state;

[0098] In the first data state, the channel selection method is to determine the transmission combination according to the preset selection method, and determine the selection optimization method according to the relay radiation value and data sensitivity;

[0099] In the second data state, the channel selection method is to determine the transmission channel according to the transmission difficulty threshold, wherein the to-be-transmitted channel with the smallest transmission difficulty threshold is used as the transmission channel for each communication data.

[0100] Among them, the transmission difficulty threshold is confirmed in the following way: for a single channel to be transmitted, the channel to be transmitted is recorded as the target channel, and the transmission difficulty threshold corresponding to the target channel = (power line length corresponding to the target channel / distance average) + (load quantity fluctuation value corresponding to the target channel + load power fluctuation value corresponding to the target channel) / fluctuation average.

[0101] Specifically, the transmission combination is determined according to a preset selection method, wherein:

[0102] Performing combined analysis on each communication data, when performing combined analysis on a single communication data, recording the communication data as target communication data, recording communication data other than the target communication data and not recorded in the transmission combination as reference communication data, and recording a sequence after sorting the reference communication data in descending order of data reference values ​​as a reference sequence;

[0103] Recording the target communication data and a preset number of reference communication data selected in a preset selection method into a transmission combination, and continuing to perform combination analysis on the communication data not recorded in the transmission combination until all the communication data are recorded in the transmission combination;

[0104] The preset number is positively correlated with the comprehensive evaluation value.

[0105] Among them, data reference value = sensitivity coefficient + association reference value, comprehensive evaluation value = channel impact coefficient + data evaluation coefficient; when a preset number of communication data is selected according to a preset selection method and recorded in a transmission combination, if the number of communication data not recorded in the transmission combination is less than the preset number, the communication data not recorded in the transmission combination will be recorded in a transmission combination.

[0106] Specifically, the preset selection method is determined according to the data relevance and data sensitivity;

[0107] If the data correlation is less than the preset data correlation or the data sensitivity is greater than or equal to the preset data sensitivity, the preset selection method is to select the same number of communication data at both ends of the reference sequence;

[0108] If the data correlation degree is greater than or equal to the preset data correlation degree and the data sensitivity is less than the preset data sensitivity, the preset selection method is to select the communication data in the reference sequence in descending order of correlation influence values.

[0109] The confirmation method of the associated impact value is that, for a single reference communication data, the reference communication data is recorded as the impact data, and the associated impact value corresponding to the impact data is the associated value between the impact data and the target communication data;

[0110] The values ​​of the preset data association and the preset data sensitivity can be determined by the user according to the actual application scenario. The larger the value of the preset data association and the smaller the value of the preset data sensitivity, the greater the user's demand for selecting the same amount of communication data at both ends of the reference sequence as the preset selection method. A value of the preset data association and the preset data sensitivity is provided, and the historical records of selecting the communication data in the reference sequence in order of association impact value from large to small are detected. The average value of the data association corresponding to the historical records that can meet the user's needs is recorded as the preset data association, and the average value of the data sensitivity corresponding to the historical records that can meet the user's needs is recorded as the preset data sensitivity.

[0111] Specifically, the optimization method is selected based on the relay radiation value and data sensitivity;

[0112] If the relay radiation value is greater than or equal to the preset relay radiation value or the data sensitivity is greater than or equal to the preset data sensitivity, the optimization method is to select a transmission channel according to the channel correlation and the combination correlation;

[0113] If the relay radiation value is less than the preset relay radiation value and the data sensitivity is less than the preset data sensitivity, the optimization method is to select the transmission channel according to the channel impact value. When selecting the transmission channel for a single transmission combination, the transmission combination is recorded as the first target transmission combination, and the to-be-transmitted channel with the smallest channel impact value and no assigned transmission combination is used as the transmission channel corresponding to the first target transmission combination.

[0114] Among them, the value of the preset relay radiation value can be determined by the user according to the actual application scenario. The larger the value of the preset relay radiation value, the greater the user's need to select a transmission channel according to the channel impact value. A value of the preset relay radiation value is provided, and the historical records of selecting a transmission channel according to the channel impact value are detected, and the average value of the relay radiation values ​​corresponding to the historical records that meet the user's needs is recorded as the preset relay radiation value;

[0115] The channel impact value is confirmed in the following way: for a single channel to be transmitted, the channel to be transmitted is recorded as the target channel to be transmitted, the relay points in the target channel to be transmitted are recorded as Class I relay points, the relay points not located in the target channel to be transmitted are recorded as Class II relay points, the relay areas corresponding to each Class II relay point are recorded as Class II areas, the radiation areas corresponding to Class I relay points are recorded as affected radiation areas, the channel impact value corresponding to the target channel to be transmitted = the number of Class I relay points - the number of affected relay areas corresponding to the target channel to be transmitted, and the affected relay areas are the number of Class II areas that overlap with the affected radiation areas.

[0116] Specifically, the transmission channel is selected according to the channel correlation and the combined correlation, wherein:

[0117] When selecting a transmission channel for a single transmission combination, the transmission combination is recorded as a second target transmission combination, and a transmission channel corresponding to an allocated transmission combination whose combination correlation with the second target transmission combination is greater than a preset combination correlation is recorded as an impact channel;

[0118] The to-be-transmitted channel that has the smallest channel correlation with each influencing channel and is not assigned a transmission combination is used as the transmission channel corresponding to the second target transmission combination.

[0119] Wherein, the transmission channel is a channel to be transmitted to which a transmission combination has been assigned, and the method for confirming the combined association degree is that, for any two transmission combinations, the smaller value of the combined influence values ​​corresponding to the two transmission combinations is recorded as the combined association degree; the method for confirming the combined influence value is that, for any two transmission combinations, they are respectively recorded as the first transmission combination and the second transmission combination, the communication data in the first transmission combination is recorded as the first communication data, and the communication data in the second transmission combination is recorded as the second communication data, the combined influence value corresponding to the first transmission combination is the average value of the first unit influence values ​​corresponding to the first communication data, the combined influence value corresponding to the second transmission combination is the average value of the second unit influence values ​​corresponding to the second communication data, the first unit influence value is the average value of the association values ​​corresponding to the single first communication data and the second communication data, and the second unit influence value is the average value of the association values ​​corresponding to the single second communication data and the first communication data;

[0120] The value of the preset combination correlation can be determined by the user according to the actual application scenario. The greater the user's demand for stable transmission of communication data, the smaller the value of the preset combination correlation. A value of the preset combination correlation is provided, and the historical records of selecting the transmission channel according to the channel correlation and the combination correlation are detected, and the average value of the combination correlation corresponding to the historical records that can meet the user's expectations is recorded as the preset combination correlation;

[0121] The method for confirming the channel association degree is that, for any two channels to be transmitted, the relay area corresponding to each relay point in one channel to be transmitted is recorded as the first area, and the relay area corresponding to each relay point in the other channel to be transmitted is recorded as the second area, and the number of relay areas where the first area and the second area overlap is recorded as the channel association degree.

[0122] Specifically, the device association coefficient determination method is determined according to the number of connected devices;

[0123] If the number of connected devices is less than the preset number of connected devices, the device association coefficient is determined according to the start-stop difference, wherein the device association coefficient is negatively correlated with the start-stop difference;

[0124] If the number of connected devices is greater than or equal to the preset number of connected devices, the device association coefficient is determined according to the interval start-stop coefficient, where the device association coefficient is the average value of the interval start-stop coefficients corresponding to each device combination.

[0125] Among them, the number of access devices is the number of access load devices connected to the power line corresponding to each channel to be transmitted in the current monitoring period; the value of the preset number of access devices can be determined by the user according to the actual application scenario. The larger the value of the preset number of access devices, the greater the demand for determining the device correlation coefficient according to the start-stop difference. A value of the preset number of access devices is provided, and the preset number of access devices is 30% of the number of load devices connected to the power line corresponding to the channel to be transmitted;

[0126] Start-stop difference = access time difference corresponding to each access load device in the current monitoring period + access power difference corresponding to each access load device in the current monitoring period. The confirmation method of access time difference and access power difference is that for several access load devices in the current monitoring period, which are recorded as reference devices, access time difference = (the maximum value of the running time corresponding to each reference device - the minimum value of the running time corresponding to each reference device) / the maximum value of the running time corresponding to each reference device, access power difference = (the maximum value of the power corresponding to each reference device - the minimum value of the power corresponding to each access load device) / the maximum value of the power corresponding to each access load device;

[0127] The interval start-stop coefficient is confirmed in the following way: for a single device combination, each connected load device corresponding to the device combination is recorded as an analysis device, and the interval start-stop coefficient = the access time difference corresponding to each analysis device + the access power difference corresponding to each analysis device;

[0128] The method for confirming the device combination is to perform a combination analysis on each access load device within the current monitoring period. When performing a combination analysis on a single access load device, the access load device is recorded as the target access load device, and the other access load devices other than the target access load device are recorded as reference access load devices. The reference access load devices whose shortest distance to the target access load device is less than the preset shortest distance and the set of target access load devices are recorded into a device combination, and the combination analysis is continued for the access load devices that are not recorded in the device combination until each access load device is recorded in the device combination.

[0129] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0130] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A channel selection method for power line carrier communication, characterized in that: include: Determine the relay area division method according to the number of relay points and the relay point distribution coefficient. The relay area division method is to divide according to the distance reference value and the preset conditions, or record the radiation area corresponding to the relay point as the relay area; Determine the device association coefficient determination method according to the number of connected devices. The device association coefficient determination method is to determine the device association coefficient according to the start-stop difference or the interval start-stop coefficient; The preset condition is determined according to the device association coefficient, and the preset condition is that the relay point difference is less than the preset relay point difference or the transmission coefficient is greater than the preset transmission coefficient; Determine the relay radiation value according to the sum of the areas of the overlapping areas corresponding to each relay area; The data status is determined according to the channel influence coefficient and the data evaluation coefficient, and the channel selection method is determined according to the data status. The channel selection method is to determine the transmission combination according to the preset selection method and determine the selection optimization method according to the relay radiation value and the data sensitivity, or determine the transmission channel according to the transmission difficulty threshold; The optimization method is to select a transmission channel according to a channel correlation degree and a combined correlation degree or to select a transmission channel according to a channel influence value.

2. The channel selection method for power line carrier communication according to claim 1, characterized in that: Determine the division method of relay areas according to the number of relay points and the relay point distribution coefficient; If the number of relay points is greater than or equal to the preset number of relay points or the relay point distribution coefficient is less than the preset relay point distribution coefficient, the relay area is divided according to the distance reference value and the preset conditions; If the number of relay points is less than the preset number of relay points and the relay point distribution coefficient is greater than or equal to the preset relay point distribution coefficient, the relay area division method is to record the radiation area corresponding to the relay point as the relay area.

3. The channel selection method for power line carrier communication according to claim 2, characterized in that: Divided according to distance reference value and preset conditions, among which, Performing division analysis on each relay point, when performing division analysis on a single relay point, record the relay point as the target relay point, and record other relay points other than the target relay point that are not recorded in the similarity set as reference relay points; Recording a set of reference relay points and target relay points whose distance reference values ​​to the target relay point are less than a preset distance reference value and satisfy preset conditions as a similar set; And continue to divide and analyze the relay points that are not recorded in the similarity set until all relay points are recorded in the similarity set; The minimum area that can contain the radiation areas corresponding to the relay points in a single similarity set is recorded as a relay area; The preset condition is determined according to the equipment association coefficient; If the device association coefficient is greater than or equal to the preset device association coefficient, the preset condition is that the relay point difference is less than the preset relay point difference; If the device association coefficient is less than the preset device association coefficient, the preset condition is that the transmission coefficient is greater than the preset transmission coefficient.

4. The channel selection method for power line carrier communication according to claim 1, characterized in that: The data status includes: A first data state in which a channel influence coefficient is greater than or equal to a preset channel influence coefficient or a data evaluation coefficient is greater than or equal to a preset data evaluation coefficient; A second data state in which the channel influence coefficient is less than a preset channel influence coefficient and the data evaluation coefficient is less than a preset data evaluation coefficient.

5. The channel selection method for power line carrier communication according to claim 4, characterized in that: Determine the channel selection mode according to the data status; In the first data state, the channel selection method is to determine the transmission combination according to the preset selection method, and determine the selection optimization method according to the relay radiation value and data sensitivity; In the second data state, the channel selection method is to determine the transmission channel according to the transmission difficulty threshold, wherein the to-be-transmitted channel with the smallest transmission difficulty threshold is used as the transmission channel for each communication data.

6. The channel selection method for power line carrier communication according to claim 5, characterized in that: The transmission combination is determined according to the preset selection method, where: Performing combined analysis on each communication data, when performing combined analysis on a single communication data, recording the communication data as target communication data, recording communication data other than the target communication data and not recorded in the transmission combination as reference communication data, and recording a sequence after sorting the reference communication data in descending order of data reference values ​​as a reference sequence; Recording the target communication data and a preset number of reference communication data selected in a preset selection method into a transmission combination, and continuing to perform combination analysis on the communication data not recorded in the transmission combination until all the communication data are recorded in the transmission combination; The preset number is positively correlated with the comprehensive evaluation value.

7. The channel selection method for power line carrier communication according to claim 6, characterized in that: Determine the preset selection method based on data relevance and data sensitivity; If the data correlation is less than the preset data correlation or the data sensitivity is greater than or equal to the preset data sensitivity, the preset selection method is to select the same number of communication data at both ends of the reference sequence; If the data correlation degree is greater than or equal to the preset data correlation degree and the data sensitivity is less than the preset data sensitivity, the preset selection method is to select the communication data in the reference sequence in descending order of correlation influence values.

8. The channel selection method for power line carrier communication according to claim 5, characterized in that: Determine the optimization method based on the relay radiation value and data sensitivity; If the relay radiation value is greater than or equal to the preset relay radiation value or the data sensitivity is greater than or equal to the preset data sensitivity, the optimization method is to select a transmission channel according to the channel correlation and the combination correlation; If the relay radiation value is less than the preset relay radiation value and the data sensitivity is less than the preset data sensitivity, the optimization method is to select the transmission channel according to the channel impact value. When selecting the transmission channel for a single transmission combination, the transmission combination is recorded as the first target transmission combination, and the to-be-transmitted channel with the smallest channel impact value and no assigned transmission combination is used as the transmission channel corresponding to the first target transmission combination.

9. The channel selection method for power line carrier communication according to claim 8, characterized in that: The transmission channel is selected according to the channel correlation and the combined correlation, wherein: When selecting a transmission channel for a single transmission combination, the transmission combination is recorded as a second target transmission combination, and a transmission channel corresponding to an allocated transmission combination whose combination correlation with the second target transmission combination is greater than a preset combination correlation is recorded as an impact channel; The to-be-transmitted channel that has the smallest channel correlation with each influencing channel and is not assigned a transmission combination is used as the transmission channel corresponding to the second target transmission combination.

10. The channel selection method for power line carrier communication according to claim 3, characterized in that: Determine the device association coefficient determination method based on the number of connected devices; If the number of connected devices is less than the preset number of connected devices, the device association coefficient is determined according to the start-stop difference, wherein the device association coefficient is negatively correlated with the start-stop difference; If the number of connected devices is greater than or equal to the preset number of connected devices, the device association coefficient is determined according to the interval start-stop coefficient, where the device association coefficient is the average value of the interval start-stop coefficients corresponding to each device combination.

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