A dual-mode communication system based on power line carrier and wireless communication

Abstract

The present application discloses a dual-mode communication system based on power line carrier and wireless communication, including: a dual-mode communication module and a test module are respectively arranged on each communication link segment; the test module is used to control the head-end communication node of the communication link segment to send test signal data to the tail-end communication node through the power carrier communication unit and the wireless communication unit respectively at every preset period; the power communication parameters and wireless communication parameters on each communication link segment are detected; based on the power communication parameters and wireless communication parameters detected at the current time node, the power transmission quality and wireless transmission quality on each communication link segment are calculated; the control module is used to determine the communication mode of each communication link segment at the current time node according to the transmission quality. Thus, by comprehensively considering the transmission quality of the power carrier and wireless communication, it is possible to determine the communication mode that best suits the current communication link segment, improve the stability of the communication system, and solve the problem of communication instability caused by the complexity and variability of the communication environment.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a dual-mode communication system based on power line carrier and wireless communications. Background Art

[0002] Power line carrier is a technology that uses power lines to transmit information. It uses the power lines themselves as the transmission medium and transmits data to different locations by modulating high-frequency signals. Wireless communication refers to the technology of transmitting data and communication signals through wireless signals. The two communication modes have their own advantages and disadvantages and are suitable for different application scenarios. In order to complement each other and improve the stability and usage scenarios of the communication transmission system, dual-mode communication systems involving power line carriers and wireless communications have been developed.

[0003] However, different link segments of the communication link are affected by many factors. For example, under power line carrier transmission, due to the complex electromagnetic environment of the power line, the quality of power line carrier communication will be affected by factors such as complex power load conditions, strong and time-varying noise interference, etc.; while under wireless transmission, in channel environments such as between high-rise buildings or in shielded places, the signal has poor ability to penetrate obstacles and the signal attenuates quickly. At the same time, due to the very limited frequency resources, the signal bandwidth is small. However, the prior art does not consider detecting the applicability of the currently transmitted signal in different communication link segments under wireless transmission or power line carrier transmission, and adaptively and automatically adjusting the transmission mode, resulting in poor signal transmission quality and signal transmission stability. Summary of the invention

[0004] The present application provides a dual-mode communication system based on power line carrier and wireless communication, which comprehensively considers the transmission quality of power line carrier and wireless communication, can determine the communication mode that is most suitable for the current communication link segment, improve the stability of the communication system, and solve the problem of communication instability caused by the complex and changeable communication environment.

[0005] The present application provides a dual-mode communication system based on power line carrier and wireless communication, including: a dual-mode communication module, a test module, and a control module;

[0006] The dual-mode communication module is arranged on each communication link segment in the preset communication link, and is used to transmit signal data on the corresponding communication link segment. The dual-mode communication module includes a power carrier communication unit and a wireless communication unit.

[0007] The test module is set on each communication link segment, and the test module establishes a connection with the corresponding dual-mode communication module, including a verification unit and a detection unit. The verification unit is used to: control the head-end communication node of the communication link segment every preset period, and send preset test signal data to the tail-end communication node through the power carrier communication unit and the wireless communication unit of the dual-mode communication module respectively; the detection unit is used to:

[0008] A1. Detecting power communication parameters of the power carrier communication unit transmitting test signal data on each communication link segment and wireless communication parameters of the wireless communication unit transmitting test signal data based on each channel;

[0009] A2. Based on the power communication parameters and wireless communication parameters detected at the current time node, the transmission quality on each communication link segment is calculated, and the transmission quality includes power transmission quality and wireless transmission quality;

[0010] The control module establishes a connection with the test module of each communication link segment, and is used to: determine the communication mode of the dual-mode communication module of each communication link segment at the current time node according to the acquired transmission quality of the communication link segment, and control the corresponding dual-mode communication module to switch to the determined communication mode.

[0011] Preferably, the power communication parameters include signal-to-noise ratio, bit error rate, and signal attenuation rate, and the wireless communication parameters include signal attenuation rate, channel bandwidth, and noise power spectrum density;

[0012] Based on the power communication parameters detected at the current time node, the power transmission quality is calculated according to the following formula:

[0013]

[0014] Among them, Q e is the power transmission quality of the communication link segment at the current time node, SNR is the signal-to-noise ratio, SNR0 is the preset signal-to-noise ratio standard threshold, BER is the bit error rate, BER0 is the preset bit error rate standard threshold, SAR is the signal attenuation rate, SAR0 is the preset signal attenuation rate standard threshold, w1, w2, w3 are the weight coefficients of the signal-to-noise ratio, bit error rate, and signal attenuation rate respectively;

[0015] Based on the wireless communication parameters detected at the current time node, the wireless transmission quality is calculated according to the following formula:

[0016]

[0017] Among them, Q w is the wireless transmission quality of the communication link segment at the current time node, N is the number of channels on the wireless communication unit, Q i is the wireless transmission quality of the i-th channel, Q i It can be calculated according to the following formula:

[0018]

[0019] Among them, Q iis the wireless transmission quality of the i-th channel, SAR is the signal attenuation rate on the i-th channel, SAR0 is the preset signal attenuation rate standard threshold, NPSD is the noise power spectral density on the i-th channel, NPSD0 is the preset noise power spectral density standard threshold, BW is the channel bandwidth of the i-th channel, BW0 is the preset channel bandwidth standard threshold, v1 and v2 are the weight coefficients of signal attenuation rate and noise power spectral density, respectively.

[0020] Preferably, the communication mode of the dual-mode communication module includes a first communication mode and a second communication mode, the first communication mode indicates that the power carrier communication unit is used to transmit the signal data on the communication link segment, and the second communication mode indicates that the wireless communication unit is used to transmit the signal data on the communication link segment, specifically including:

[0021] C1. When the dual-mode communication unit of the corresponding communication link segment is controlled to adopt the first communication mode, the carrier power of the power carrier communication unit in the corresponding communication link segment when transmitting signal data is adjusted based on the power transmission quality;

[0022] C2. When the dual-mode communication unit of the corresponding communication link segment is controlled to adopt the second communication mode, a channel with the highest wireless transmission quality is selected as a target channel for the wireless communication unit to transmit signal data.

[0023] Preferably, the control module determines the communication mode of the dual-mode communication module of the corresponding communication link segment at the current time node according to the acquired transmission quality of the communication link segment, including:

[0024] D1. If the power line transmission quality is greater than or equal to the power standard threshold and the wireless transmission quality is lower than the wireless standard threshold, select the first communication mode;

[0025] D2. If the power transmission quality is less than the power standard threshold and the wireless transmission quality is greater than or equal to the wireless standard threshold, select the second communication mode;

[0026] D3. If the transmission qualities of both are greater than or equal to their respective standard thresholds, the communication mode corresponding to the transmission quality with the larger difference is determined as the communication mode of the current time node of the communication link segment; wherein the difference ratio is set to the result value of the absolute value of the difference between the transmission quality and the corresponding standard threshold divided by the corresponding standard threshold.

[0027] Preferably, the test module further comprises a history storage unit, which stores a plurality of transmission quality data strips arranged in order from near to far according to the detection time nodes, each transmission quality data strip comprising the detection time node, a unique number of the communication link segment, and the transmission quality;

[0028] The detection unit is also used to package the power transmission quality and wireless transmission quality on each communication link segment detected at the current detection time node into data information and transmit it to the historical storage unit. The historical storage unit is also used to continuously receive the power transmission quality and wireless transmission quality obtained by the detection unit in step A2 and their corresponding communication link segments and detection time nodes, and create new transmission quality data strips, store the received data information in the corresponding transmission quality data strips according to the detection time nodes, and update the transmission quality data strips in the historical storage unit.

[0029] Preferably, A2 further includes:

[0030] A3. Using the unique number of each communication link segment and the current time node, obtain the power transmission quality and wireless transmission quality in the transmission quality data strips corresponding to all detection time nodes in the preset historical time period in the historical storage unit;

[0031] A4. For all transmission qualities within a preset historical time period, respectively calculate the power difference between each power transmission quality and the power standard threshold, and the wireless difference between each wireless transmission quality and the wireless standard threshold;

[0032] A5. Analyze the standard deviations of all power differences and wireless differences in the historical time period to obtain power stability factors and wireless stability factors;

[0033] A6. Multiply the power transmission quality by the power stability factor and the wireless transmission quality by the wireless stability factor to obtain a first power transmission quality and a first wireless transmission quality, and update and replace the original power transmission quality and wireless transmission quality.

[0034] Preferably, the A6 further comprises:

[0035] S1, based on each communication link segment, obtaining the power stability factor and wireless stability factor of all its adjacent communication link segments at the current time node;

[0036] S2, according to the distance value between the communication nodes at both ends of the adjacent communication link segment, respectively obtain the influence weight value of each adjacent communication link segment on each communication link segment;

[0037] S3, obtaining a power adjacent influence coefficient and a wireless adjacent influence coefficient of each communication link segment according to the power stability factor, wireless stability factor, and influence weight value of all adjacent communication link segments of each communication link segment;

[0038] S4, according to the power adjacent influence coefficient and the wireless adjacent influence coefficient, based on the adjustment coefficients corresponding to the preset multiple adjacent influence coefficient intervals, the first power transmission quality and the first wireless transmission quality are corrected, and the new first power transmission quality and the first wireless transmission quality are used to update and replace the original power transmission quality and the wireless transmission quality.

[0039] Preferably, the power adjacent influence coefficient is calculated according to the following formula:

[0040]

[0041] Among them, A e is the power adjacent influence coefficient, α ek is the power stability factor of the kth adjacent communication link segment, p k is the influence weight value of the kth adjacent communication link segment;

[0042] The wireless adjacent influence coefficient is calculated according to the following formula:

[0043]

[0044] Among them, A w is the wireless neighbor influence coefficient, α ew is the wireless stability factor of the kth adjacent communication link segment, p k is the influence weight value of the kth adjacent communication link segment.

[0045] Preferably, the test module is also used for:

[0046] E1. Before detecting the transmission quality of each communication link segment in the next preset cycle, obtain the transmission mode determined by each communication link segment in the communication link of the previous preset cycle, and form all adjacent communication link segments with the same transmission mode into a grasshopper link;

[0047] E2. Based on each grasshopper link in the previous preset cycle, record the transmission mode determined by the grasshopper link as the target transmission mode, and obtain the grasshopper maintenance amount of the grasshopper link according to the length of time the grasshopper link continuously maintains the target transmission mode;

[0048] E3. When the detection of the transmission quality of each communication link segment in the next preset cycle begins, execute steps A1 to A2, and use the grasshopper maintenance amount to adjust the power transmission quality and wireless transmission quality of each communication link segment in the grasshopper link to obtain the second power transmission quality and the second wireless transmission quality of each communication link segment in the grasshopper link, and use the second power transmission quality and the second wireless transmission quality to replace the original power transmission quality and wireless transmission quality of each communication link segment in the grasshopper link.

[0049] Preferably, the grasshopper maintenance amount is calculated according to the following formula:

[0050]

[0051] Among them, M is the grasshopper maintenance amount, T is the duration of the target transmission mode continuously maintained from the current time node forward, t is the duration of the preset cycle, and b is the preset grasshopper maintenance benchmark value.

[0052] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0053] By comprehensively considering the transmission quality of power carrier and wireless communication, and using the test module to periodically test the communication quality, it is possible to periodically and dynamically select the communication mode and parameters that best suit the communication environment of the current communication link segment, thereby improving the stability of communication and signal quality, and effectively solving the problem of communication instability caused by the complexity and changeability of the communication environment;

[0054] By introducing the power stability factor and the wireless stability factor, the performance of each communication mode on each communication link segment can be more comprehensively evaluated, so as to make more reliable communication mode selection and parameter adjustment decisions;

[0055] By introducing the distance value and stability factor of adjacent communication links, the adjacent influence coefficient of each communication link segment is obtained. Considering the influence of adjacent links, the transmission mode of the communication link segment is selected, which can reduce potential signal interference and thus improve the reliability and efficiency of data transmission.

[0056] By introducing a grasshopper link in combination with the previous preset cycle and determining the grasshopper maintenance amount according to the retention time of the transmission mode of the grasshopper link, the transmission quality in the grasshopper link is adjusted during the next preset cycle detection, thereby reducing frequent mode switching caused by slight transmission quality differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of the process of a dual-mode communication system based on power line carrier and wireless communication according to an embodiment of the present invention. DETAILED DESCRIPTION

[0058] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0059] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0061] Embodiment 1:

[0062] Figure 1 It is a schematic diagram of the process of a dual-mode communication system based on power line carrier and wireless communication according to an embodiment of the present invention.

[0063] like Figure 1 As shown, the dual-mode communication system based on power line carrier and wireless communication includes: a dual-mode communication module, a test module, and a control module.

[0064] In some embodiments, a preset communication link is composed of several communication nodes, every two adjacent communication nodes constitute a communication link segment, and several communication link segments constitute the preset communication link. A dual-mode communication module is provided on each communication link segment for transmitting signal data on the corresponding communication link segment, and the dual-mode communication module includes a power carrier communication unit and a wireless communication unit.

[0065] Specifically, the power carrier communication unit is connected to the power line to transmit the carrier signal to the power line, and the wireless communication unit is used to transmit the micro-power wireless signal to other wireless communication units on the communication link.

[0066] For example, the preset communication link is ABCD, which is composed of communication node A, communication node B, communication node C and communication node D, including three communication link segments AB, BC and CD.

[0067] In some embodiments, a test module is provided on each communication link segment, and the test module is connected to the corresponding dual-mode communication module, including a verification unit and a detection unit, and the verification unit is connected to the detection unit.

[0068] The verification unit is used to:

[0069] The head-end communication node of the communication link segment is controlled at every preset period to send preset test signal data to the tail-end communication node through the power carrier communication unit and the wireless communication unit of the dual-mode communication module respectively.

[0070] Specifically, the wireless communication unit includes several channels, and the verification unit is specifically used to transmit the test signal data through each channel of the wireless communication unit, wherein the channels may be different working frequency bands, which will not be described in detail in the present invention.

[0071] The detection unit is used for:

[0072] A1. Detect the communication parameters of the power carrier communication unit and the wireless communication unit transmitting the test signal data on the corresponding communication link segment, and obtain the power communication parameters and the wireless communication parameters corresponding to each channel;

[0073] A2. Based on the power communication parameters and wireless communication parameters detected at the current time node, the transmission quality on the communication link segment is calculated, and the transmission quality includes power transmission quality and wireless transmission quality.

[0074] Among them, power communication parameters include signal-to-noise ratio, bit error rate, and signal attenuation rate; wireless communication parameters include signal attenuation rate, channel bandwidth, and noise power spectrum density.

[0075] Specifically, based on the power communication parameters detected at the current time node, the power transmission quality is calculated according to the following formula:

[0076]

[0077] Among them, Q e is the power transmission quality of the communication link segment at the current time node, SNR is the signal-to-noise ratio, SNR0 is the preset signal-to-noise ratio standard threshold, BER is the bit error rate, BER0 is the preset bit error rate standard threshold, SAR is the signal attenuation rate, SAR0 is the preset signal attenuation rate standard threshold, w1, w2, w3 are the weight coefficients of the signal-to-noise ratio, bit error rate, and signal attenuation rate, respectively, which are adjusted according to the actual situation to indicate the degree of influence on the power transmission quality.

[0078] Specifically, based on the wireless communication parameters detected at the current time node, the wireless transmission quality is calculated according to the following formula:

[0079]

[0080] Among them, Q w is the wireless transmission quality of the communication link segment at the current time node, N is the number of channels on the wireless communication unit, Q i is the wireless transmission quality of the i-th channel, Q i It can be calculated according to the following formula:

[0081]

[0082] Among them, Q iis the wireless transmission quality of the i-th channel, SAR is the signal attenuation rate on the i-th channel, SAR0 is the preset signal attenuation rate standard threshold, NPSD is the noise power spectral density on the i-th channel, NPSD0 is the preset noise power spectral density standard threshold, BW is the channel bandwidth of the i-th channel, BW0 is the preset channel bandwidth standard threshold, v1 and v2 are the weight coefficients of signal attenuation rate and noise power spectral density respectively, which can be adjusted according to actual conditions and are used to indicate the degree of influence on the wireless transmission quality.

[0083] In some embodiments, the control module establishes a connection with the test module of each communication link segment, and is specifically used to determine the communication mode of the dual-mode communication module of the corresponding communication link segment at the current time node based on the acquired transmission quality of the communication link segment, and control the corresponding dual-mode communication module to switch to the determined communication mode.

[0084] Among them, the communication mode of the dual-mode communication module includes a first communication mode and a second communication mode, the first communication mode indicates that the power carrier communication unit is used to transmit the signal data on the communication link segment, and the second communication mode indicates that the wireless communication unit is used to transmit the signal data on the communication link segment, specifically including:

[0085] C1. When the dual-mode communication unit of the corresponding communication link segment is controlled to adopt the first communication mode, the carrier power of the power carrier communication unit in the corresponding communication link segment when transmitting signal data is adjusted based on the power transmission quality.

[0086] It should be noted that the correspondence between power transmission quality and carrier power is pre-set based on historical experience and can be adjusted according to actual conditions. For example, each carrier power corresponds to a power transmission quality interval, and the power transmission quality interval is set according to a preset power standard threshold, that is, the lower limit value of the power transmission quality interval must be greater than the power standard threshold. The power transmission quality interval to which the power transmission quality of the current time node belongs is determined, and the corresponding carrier power is matched according to the interval. Further, the current carrier power of the carrier communication unit is adjusted to the matching carrier power.

[0087] C2. When the dual-mode communication unit of the corresponding communication link segment is controlled to adopt the second communication mode, a channel with the highest wireless transmission quality is selected as a target channel for the wireless communication unit to transmit signal data.

[0088] It should be noted that the power carrier communication unit is used to convert signal data into a carrier signal, and the wireless communication unit is used to convert signal data into a micro-power wireless signal.

[0089] In some embodiments, the control module determines the communication mode of the dual-mode communication module of the corresponding communication link segment at the current time node according to the acquired transmission quality of the communication link segment, specifically including:

[0090] D1. If the power line transmission quality is greater than or equal to the power standard threshold and the wireless transmission quality is lower than the wireless standard threshold, select the first communication mode.

[0091] D2. If the power transmission quality is less than the power standard threshold and the wireless transmission quality is greater than or equal to the wireless standard threshold, select the second communication mode.

[0092] D3. If the transmission qualities of both are greater than or equal to their respective standard thresholds, the communication mode corresponding to the transmission quality with the larger difference is determined as the communication mode of the current time node of the communication link segment.

[0093] The difference ratio is set to the result value of the absolute value of the difference between the transmission quality and the corresponding standard threshold divided by the corresponding standard threshold. For example, if the difference ratio of the power transmission quality is greater than the difference ratio of the wireless transmission quality, the first communication mode is selected.

[0094] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0095] By comprehensively considering the transmission quality of power carrier and wireless communication, and using the test module to periodically test the communication quality, it is possible to periodically and dynamically select the communication mode and parameters that best suit the communication environment of the current communication link segment, thereby improving the stability of communication and signal quality, and effectively solving the problem of communication instability caused by the complexity and changeability of the communication environment;

[0096] The first communication mode adjusts the carrier power of the power carrier communication unit in real time according to the power transmission quality. The second communication mode selects the optimal channel for wireless signal transmission according to the wireless transmission quality of each channel. According to the transmission quality detected by the test modules on the two communication units, the relevant parameters of the communication mode are adjusted in a targeted manner to adapt to the communication environment status at the current time node, thereby achieving optimal utilization of communication resources and reducing unnecessary energy consumption and channel occupancy.

[0097] Embodiment 2:

[0098] In a complex communication environment, it may not be comprehensive to rely solely on the transmission quality detected at a single time point to determine the communication mode of a communication link segment. Due to the dynamic changes in the communication environment, the transmission quality at a single time point may not represent the overall performance of the communication link segment over a period of time. In order to avoid frequent mode switching in the future due to the judgment results limited to short-term quality detection, it is necessary to consider the stability of the transmission quality of each communication mode in the time series.

[0099] Therefore, the embodiments of the present application are optimized to a certain extent based on the above embodiments.

[0100] In some embodiments, the test module also includes a historical storage unit, which stores a number of transmission quality data strips arranged in order from near to far according to the detection time nodes, and each transmission quality data strip includes the detection time node, the unique number of the communication link segment, and the transmission quality.

[0101] Among them, the detection unit is also used to package the power transmission quality and wireless transmission quality on each communication link segment detected at the current detection time node into data information and transmit it to the historical storage unit. The historical storage unit is also used to continuously receive the power transmission quality and wireless transmission quality obtained by the detection unit in step A2 and their corresponding communication link segments and detection time nodes, and create new transmission quality data strips, and store the received data information in the corresponding transmission quality data strips according to the detection time nodes, thereby updating the transmission quality data strips in the historical storage unit.

[0102] In some embodiments, step A2 further includes:

[0103] A3. Using the unique number of the corresponding communication link segment and the current time node, the power transmission quality and the wireless transmission quality in the transmission quality data strips corresponding to all the detection time nodes in the preset historical time period are obtained in the historical storage unit.

[0104] The preset historical time period can be set to the past 24 hours from the current time node, and can be set according to actual conditions.

[0105] A4. For all transmission qualities within a preset historical time period, the power difference between each power transmission quality and the power standard threshold, and the wireless difference between each wireless transmission quality and the wireless standard threshold are calculated respectively.

[0106] A5. Analyze the changes of all power differences and wireless differences in the historical time period, and calculate the power stability factor and wireless stability factor.

[0107] Specifically, the standard deviation of all power differences in the historical time period is calculated, and the power stability factor is obtained according to the standard deviation, which is used to characterize the signal quality fluctuation of the power communication unit of the corresponding communication link segment when transmitting signal data. The larger the power stability factor, the more stable the signal on the power communication unit of the communication link segment in the historical time period. The power stability factor can be calculated according to the following formula. For example, the power stability factor can be calculated according to the following formula: α e =e -d , α eis the power stability factor, and d is the standard deviation of all power differences on the corresponding communication link segment in the historical time period.

[0108] Similarly, the standard deviation of all wireless differences within the historical time period is calculated, and the wireless stability factor is obtained based on the standard deviation, which is used to characterize the signal quality fluctuation of the wireless communication unit of the corresponding communication link segment when transmitting signal data. The larger the wireless stability factor, the more stable the signal on the wireless communication unit of the communication link segment during the historical time period.

[0109] A6. Multiply the power transmission quality by the power stability factor and the wireless transmission quality by the wireless stability factor to obtain a first power transmission quality and a first wireless transmission quality, and update and replace the original power transmission quality and wireless transmission quality.

[0110] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0111] By introducing the power stability factor and the wireless stability factor, the performance of each communication mode on each communication link segment can be evaluated more comprehensively, so as to make more reliable communication mode selection and parameter adjustment decisions; the stability of the communication mode in the recent historical time series is comprehensively considered, which does not only rely on the transmission quality at the current single detection time point. By analyzing the changes in transmission quality within the historical time period, it is helpful to allocate communication resources more efficiently, and can minimize the waste of resource overhead caused by frequent switching of communication modes or adjustment of parameters due to short-term quality fluctuations, which is conducive to the stability of the communication system.

[0112] Embodiment three:

[0113] In a communication network, the transmission quality of a communication link segment is not only affected by its own conditions, but may also be affected by adjacent communication link segments. The transmission quality of each communication link segment may be affected by factors such as the stability, interference and signal quality of its adjacent communication link segments. Failure to consider the impact of adjacent communication link segments may lead to unreliable signal connection and potential signal interference, thereby affecting the performance and stability of the entire communication network.

[0114] Therefore, the embodiments of the present application are optimized to a certain extent based on the above embodiments.

[0115] In some embodiments, step A6 further includes:

[0116] S1, based on each communication link segment, obtain the power stability factor and wireless stability factor of all its adjacent communication link segments at the current time node.

[0117] Among them, in the preset communication link, a certain communication link segment has at most two adjacent communication link segments.

[0118] S2, according to the distance value between the communication nodes at both ends of the adjacent communication link segments, respectively obtain the influence weight value of each adjacent communication link segment on each communication link segment.

[0119] Specifically, the exponential decay function can be used to calculate the influence weight value of the distance value. Assuming that the current communication link segment is AB, its adjacent communication link segment is BC, and L represents the minimum distance value between the communication nodes at both ends of the adjacent link segment BC, the exponential decay function can be used to calculate the influence weight value, as shown below:

[0120] p k =e -L , p k is the influence weight value of the kth adjacent communication link segment.

[0121] Thus, it is ensured that the smaller the distance value of the adjacent communication link segment is, the greater the weight value of its stability factor on the adjacent influence coefficient is. This calculation method can well reflect the potential impact of the adjacent communication link segment on its own transmission quality.

[0122] S3, obtaining a power adjacent influence coefficient and a wireless adjacent influence coefficient of each communication link segment according to the power stability factor, wireless stability factor and influence weight value of all adjacent communication link segments of each communication link segment.

[0123] Specifically, the power adjacent influence coefficient is calculated according to the following formula:

[0124]

[0125] Among them, A e is the power adjacent influence coefficient, α ek is the power stability factor of the kth adjacent communication link segment, p k is the influence weight value of the kth adjacent communication link segment.

[0126] Specifically, the wireless adjacent influence coefficient is calculated according to the following formula:

[0127]

[0128] Among them, A w is the wireless neighbor influence coefficient, α ew is the wireless stability factor of the kth adjacent communication link segment, p k is the influence weight value of the kth adjacent communication link segment.

[0129] It should be noted that the larger the adjacent influence coefficient is, the smaller the influence of the adjacent communication link segment on each communication link segment is.

[0130] S4, according to the power adjacent influence coefficient and the wireless adjacent influence coefficient, based on the adjustment coefficients corresponding to the preset multiple adjacent influence coefficient intervals, the first power transmission quality and the first wireless transmission quality are corrected, and the new first power transmission quality and the first wireless transmission quality are used to update and replace the original power transmission quality and the wireless transmission quality.

[0131] Specifically, the adjacent influence coefficient intervals are the first interval [A1, A2], the second interval [A2, A3], and the third interval [A3, A4], respectively. The adjustment coefficient corresponding to the first interval is 0.8, the adjustment coefficient corresponding to the second interval is 1, and the adjustment coefficient corresponding to the third interval is 1.2. According to the intervals in which the power adjacent influence coefficient and the wireless adjacent influence coefficient fall, the adjustment coefficients of the first power transmission quality and the first wireless transmission quality are obtained, and the first power transmission quality is multiplied by the corresponding adjustment coefficient to obtain a new first power transmission quality. The first wireless transmission quality is multiplied by the corresponding adjustment coefficient to obtain a new first wireless transmission quality.

[0132] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0133] By introducing the distance value and stability factor of adjacent communication links, the adjacent influence coefficient of each communication link segment is obtained, which provides a more accurate and comprehensive transmission quality evaluation method for the two transmission modes, and helps to more accurately understand the actual situation of each link segment in the communication network; by considering the influence of adjacent links and selecting the transmission mode of the communication link segment, potential signal interference can be reduced, thereby improving the reliability and efficiency of data transmission.

[0134] Embodiment 4:

[0135] Based on the aforementioned embodiments, the test module periodically detects the transmission signal quality of the two transmission modes in the dual-mode communication module, and makes a decision on the switching of the transmission mode according to the judgment logic of the power transmission quality and the wireless transmission quality. If the first transmission mode is slightly inferior to the second transmission mode, it will immediately switch to the second transmission mode, thereby ensuring that the transmission mode of the communication link segment determined in each detection cycle is always kept optimal. However, this may lead to frequent mode switching in the communication link, resulting in continuous conversion of the signal form, resulting in the possibility of delay or loss of data transmission, thereby affecting the stability and efficiency of communication. In order to solve this problem, embodiment 4 of the present invention proposes a dynamic transmission mode selection strategy based on a grasshopper link.

[0136] Therefore, the embodiments of the present application are optimized to a certain extent based on the above embodiments.

[0137] In some embodiments, the test module is further used to:

[0138] E1. Before detecting the transmission quality of each communication link segment in the next preset cycle, obtain the transmission mode determined by each communication link segment in the communication link of the previous preset cycle, and form all adjacent communication link segments with the same transmission mode into a grasshopper link.

[0139] For example, assuming that in the last preset cycle, in the five communication link segments AB, BC, CD, DE, and EF in the communication link ABCDEF, the transmission modes of the communication link segments AB, BC, CD, and EF are all the first transmission mode (power carrier communication unit), and the communication link segments AB, BC, and CD are adjacent, so the grasshopper link is ABCD. This grasshopper link is only an example, and the number of grasshopper links is not unique, and there may be multiple.

[0140] E2. Based on each grasshopper link in the previous preset cycle, record its determined transmission mode as the target transmission mode, and obtain the grasshopper maintenance amount of the grasshopper link according to the length of time the grasshopper link continuously maintains the target transmission mode (statistics are counted from the current time node forward to obtain the length of time the target transmission mode is continuously maintained).

[0141] Specifically, a grasshopper maintenance benchmark value is set for the grasshopper link (set to a value slightly greater than 1, which can be set to 1.1 and adjusted according to actual conditions), and the grasshopper maintenance amount is calculated according to the following formula:

[0142]

[0143] Among them, M is the grasshopper maintenance amount, T is the duration of the target transmission mode continuously maintained from the current time node forward, t is the duration of the preset cycle, and b is the preset grasshopper maintenance reference value. Therefore, the longer the target transmission mode is maintained, the greater the grasshopper maintenance amount is on the basis of maintaining the reference value, which reflects the stability of the grasshopper link transmission mode.

[0144] E3. When the detection of the transmission quality of each communication link segment in the next preset cycle begins, execute steps A1 to A2, and use the grasshopper maintenance amount to adjust the power transmission quality and wireless transmission quality of each communication link segment in the grasshopper link to obtain the second power transmission quality and the second wireless transmission quality of each communication link segment in the grasshopper link, and use the second power transmission quality and the second wireless transmission quality to replace the original power transmission quality and wireless transmission quality of each communication link segment in the grasshopper link.

[0145] The grasshopper maintenance amount is multiplied by the power transmission quality and the wireless transmission quality of each communication link segment in the grasshopper link, respectively, to obtain the second power transmission quality and the second wireless transmission quality of each communication link segment in the grasshopper link.

[0146] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0147] By introducing a grasshopper link in combination with the previous preset cycle and determining the grasshopper maintenance amount according to the maintenance time of the transmission mode of the grasshopper link, the transmission quality in the grasshopper link is adjusted when the next preset cycle is detected, which can reduce frequent mode switching caused by slight transmission quality differences; the grasshopper maintenance amount can be understood as a weighting factor, which makes the decision of the periodic transmission mode more inclined to maintain the current transmission mode, thereby improving the stability and efficiency of communication.

[0148] Using grasshopper maintenance to dynamically adjust the assessment of transmission quality on grasshopper links can make decisions more intelligently based on historical performance rather than just based on the current instantaneous quality.

[0149] 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 dual-mode communication system based on power line carrier and wireless communication, characterized in that: include: Dual-mode communication module, test module, control module; The dual-mode communication module is arranged on each communication link segment in the preset communication link, and is used to transmit signal data on the corresponding communication link segment. The dual-mode communication module includes a power carrier communication unit and a wireless communication unit. The test module is set on each communication link segment, and the test module establishes a connection with the corresponding dual-mode communication module, including a verification unit and a detection unit. The verification unit is used to: control the head-end communication node of the communication link segment every preset period, and send preset test signal data to the tail-end communication node through the power carrier communication unit and the wireless communication unit of the dual-mode communication module respectively; the detection unit is used to: A1. Detecting power communication parameters of the power carrier communication unit transmitting test signal data on each communication link segment and wireless communication parameters of the wireless communication unit transmitting test signal data based on each channel; A2. Based on the power communication parameters and wireless communication parameters detected at the current time node, the transmission quality on each communication link segment is calculated, and the transmission quality includes power transmission quality and wireless transmission quality; The control module establishes a connection with the test module of each communication link segment, and is used to: determine the communication mode of the dual-mode communication module of each communication link segment at the current time node according to the acquired transmission quality of the communication link segment, and control the corresponding dual-mode communication module to switch to the determined communication mode; The test module is also used to: E1. Before detecting the transmission quality of each communication link segment in the next preset cycle, obtain the transmission mode determined by each communication link segment in the communication link of the previous preset cycle, and form all adjacent communication link segments with the same transmission mode into a grasshopper link; E2. Based on each grasshopper link in the previous preset cycle, record the transmission mode determined by the grasshopper link as the target transmission mode, and obtain the grasshopper maintenance amount of the grasshopper link according to the length of time the grasshopper link continuously maintains the target transmission mode; The grasshopper maintenance amount is calculated according to the following formula: Wherein, M is the grasshopper maintenance amount, T is the duration of the target transmission mode continuously maintained from the current time node forward, t is the duration of the preset cycle, and b is the preset grasshopper maintenance benchmark value; E3. When the detection of the transmission quality of each communication link segment in the next preset cycle begins, execute steps A1 to A2, and use the grasshopper maintenance amount to adjust the power transmission quality and wireless transmission quality of each communication link segment in the grasshopper link to obtain the second power transmission quality and the second wireless transmission quality of each communication link segment in the grasshopper link, and use the second power transmission quality and the second wireless transmission quality to replace the original power transmission quality and wireless transmission quality of each communication link segment in the grasshopper link.

2. The dual-mode communication system based on power line carrier and wireless communication according to claim 1, characterized in that: The power communication parameters include signal-to-noise ratio, bit error rate, and signal attenuation rate, and the wireless communication parameters include signal attenuation rate, channel bandwidth, and noise power spectrum density; Based on the power communication parameters detected at the current time node, the power transmission quality is calculated according to the following formula: Among them, Q e is the power transmission quality of the communication link segment at the current time node, SNR is the signal-to-noise ratio, SNR0 is the preset signal-to-noise ratio standard threshold, BER is the bit error rate, BER0 is the preset bit error rate standard threshold, SAR is the signal attenuation rate, SAR0 is the preset signal attenuation rate standard threshold, w1, w2, w3 are the weight coefficients of the signal-to-noise ratio, bit error rate, and signal attenuation rate respectively; Based on the wireless communication parameters detected at the current time node, the wireless transmission quality is calculated according to the following formula: Among them, Q w is the wireless transmission quality of the communication link segment at the current time node, N is the number of channels on the wireless communication unit, Q i is the wireless transmission quality of the i-th channel, Q i It can be calculated according to the following formula: Among them, Q i is the wireless transmission quality of the i-th channel, SAR is the signal attenuation rate on the i-th channel, SAR0 is the preset signal attenuation rate standard threshold, NPSD is the noise power spectral density on the i-th channel, NPSD0 is the preset noise power spectral density standard threshold, BW is the channel bandwidth of the i-th channel, BW0 is the preset channel bandwidth standard threshold, v1 and v2 are the weight coefficients of signal attenuation rate and noise power spectral density, respectively.

3. The dual-mode communication system based on power line carrier and wireless communication according to claim 1, characterized in that: The communication mode of the dual-mode communication module includes a first communication mode and a second communication mode, wherein the first communication mode indicates that the power carrier communication unit is used to transmit the signal data on the communication link segment, and the second communication mode indicates that the wireless communication unit is used to transmit the signal data on the communication link segment, specifically including: C1. When the dual-mode communication unit of the corresponding communication link segment is controlled to adopt the first communication mode, the carrier power of the power carrier communication unit in the corresponding communication link segment when transmitting signal data is adjusted based on the power transmission quality; C2. When the dual-mode communication unit of the corresponding communication link segment is controlled to adopt the second communication mode, a channel with the highest wireless transmission quality is selected as a target channel for the wireless communication unit to transmit signal data.

4. The dual-mode communication system based on power line carrier and wireless communication as claimed in claim 3, characterized in that: The control module determines the communication mode of the dual-mode communication module of the corresponding communication link segment at the current time node according to the acquired transmission quality of the communication link segment, including: D1. If the power line transmission quality is greater than or equal to the power standard threshold and the wireless transmission quality is lower than the wireless standard threshold, select the first communication mode; D2. If the power transmission quality is less than the power standard threshold and the wireless transmission quality is greater than or equal to the wireless standard threshold, select the second communication mode; D3. If the transmission qualities of both are greater than or equal to their respective standard thresholds, the communication mode corresponding to the transmission quality with the larger difference is determined as the communication mode of the current time node of the communication link segment; wherein the difference ratio is set to the result value of the absolute value of the difference between the transmission quality and the corresponding standard threshold divided by the corresponding standard threshold.

5. The dual-mode communication system based on power line carrier and wireless communication according to claim 1, characterized in that: The test module also includes a history storage unit, which stores a number of transmission quality data strips arranged in order from near to far according to the detection time nodes, each transmission quality data strip includes the detection time node, the unique number of the communication link segment, and the transmission quality; The detection unit is also used to package the power transmission quality and wireless transmission quality on each communication link segment detected at the current detection time node into data information and transmit it to the historical storage unit. The historical storage unit is also used to continuously receive the power transmission quality and wireless transmission quality obtained by the detection unit in step A2 and their corresponding communication link segments and detection time nodes, and create new transmission quality data strips, store the received data information in the corresponding transmission quality data strips according to the detection time nodes, and update the transmission quality data strips in the historical storage unit.

6. The dual-mode communication system based on power line carrier and wireless communication according to claim 5, characterized in that: The A2 also includes: A3. Using the unique number of each communication link segment and the current time node, obtain the power transmission quality and wireless transmission quality in the transmission quality data strips corresponding to all detection time nodes in the preset historical time period in the historical storage unit; A4. For all transmission qualities within a preset historical time period, respectively calculate the power difference between each power transmission quality and the power standard threshold, and the wireless difference between each wireless transmission quality and the wireless standard threshold; A5. Analyze the standard deviations of all power differences and wireless differences in the historical time period to obtain power stability factors and wireless stability factors; A6. Multiply the power transmission quality by the power stability factor and the wireless transmission quality by the wireless stability factor to obtain a first power transmission quality and a first wireless transmission quality, and update and replace the original power transmission quality and wireless transmission quality.

7. The dual-mode communication system based on power line carrier and wireless communication according to claim 6, characterized in that: The A6 also includes: S1, based on each communication link segment, obtaining the power stability factor and wireless stability factor of all its adjacent communication link segments at the current time node; S2, according to the distance value between the communication nodes at both ends of the adjacent communication link segment, respectively obtain the influence weight value of each adjacent communication link segment on each communication link segment; S3, obtaining a power adjacent influence coefficient and a wireless adjacent influence coefficient of each communication link segment according to the power stability factor, wireless stability factor, and influence weight value of all adjacent communication link segments of each communication link segment; S4, according to the power adjacent influence coefficient and the wireless adjacent influence coefficient, based on the adjustment coefficients corresponding to the preset multiple adjacent influence coefficient intervals, the first power transmission quality and the first wireless transmission quality are corrected, and the new first power transmission quality and the first wireless transmission quality are used to update and replace the original power transmission quality and the wireless transmission quality.

8. The dual-mode communication system based on power line carrier and wireless communication according to claim 7, characterized in that: The power adjacent influence coefficient is calculated according to the following formula: Among them, A e is the power adjacent influence coefficient, α ek is the power stability factor of the kth adjacent communication link segment, p k is the influence weight value of the kth adjacent communication link segment; The wireless adjacent influence coefficient is calculated according to the following formula: Among them, A w is the wireless neighbor influence coefficient, α ew is the wireless stability factor of the kth adjacent communication link segment, p k is the influence weight value of the kth adjacent communication link segment.

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