Link quality calculation method, system and device and storage medium

Abstract

The invention relates to the technical field of power distribution network communication and intelligent power grids, in particular to a link quality calculation method, system and device and a storage medium, and the method comprises the steps: obtaining the number of transformer area nodes, the uplink and downlink communication success rates of each node, and the average signal-to-noise ratio of each node to uplink and downlink communication channels; calculating the link quality of the loop of each node according to the uplink and downlink communication success rates of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node; according to the link quality of the loop of each node, the link quality of the nodes of the whole station area is realized, on the basis of existing station area communication quality calculation, the signal-to-noise ratio on an actual physical line is innovatively combined, comprehensive analysis of the link quality of the communication station area is realized, the calculation result is more accurate, and the universality is better. The problem that accurate calculation of the link quality of a communication station area cannot be achieved due to the fact that an actual physical link environment is not considered in a station area link quality calculation method in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to a field, and in particular to a link quality calculation method system, equipment and storage medium. Background Art

[0002] Smart grid, also known as "grid 2.0", is a new type of grid. It is a new type of grid that integrates advanced sensor measurement technology, information and communication technology, computer technology and control technology on the basis of physical grid. Its goal is to achieve flexible, clean, safe, economical and friendly operation of the grid, optimize the management of the entire power system, and improve the operation efficiency and service quality of the power system.

[0003] As a basic unit of the power distribution system, the substation is powered by a transformer and covers the low-voltage users it serves. The substation link is a communication link within the substation or between the substation and the external system, which is used to transmit data, control signals and other information to achieve functions such as data collection and monitoring, remote control, protection and control, and energy management. As an important part of the power grid, the quality and stability of the substation link are of great significance to the collection of the entire power consumption information system.

[0004] However, the traditional method of calculating the link quality of the communication area mainly relies on the communication success rate in the data link layer discovery list of the communication product. This method only calculates from the communication data and does not consider the actual physical link environment, thus failing to accurately calculate the link quality of the communication area.

[0005] Therefore, developing a link quality calculation method that can be widely used in various types of communication networks has important practical value and realistic significance. Summary of the invention

[0006] In view of the problem that the existing methods for calculating link quality in communication areas do not take into account the actual physical link environment and cannot accurately calculate the link quality of communication areas, the present invention provides a link quality calculation method, system, device and storage medium.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention provides a link quality calculation method, comprising:

[0009] Get the number of nodes in the area;

[0010] Get the uplink and downlink communication success rate of each node;

[0011] Obtain the average signal-to-noise ratio of each node and the uplink and downlink communication channels;

[0012] Calculate the link quality of the loop of each node according to the uplink and downlink communication success rate of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node;

[0013] According to the link quality of the loop of each node, the link quality of the entire area node is calculated.

[0014] Furthermore, according to the uplink and downlink communication success rates of each node and the average signal-to-noise ratios of the uplink and downlink communication channels of each node, the link quality of the loop of each node is calculated as follows:

[0015] According to the number of nodes in the substation area, calculate the number of loop links of each node;

[0016] According to the uplink and downlink communication success rates and average signal-to-noise ratios of the nodes, the link quality of each loop link is obtained;

[0017] The link quality of the loop of each node is calculated according to the link quality of each loop link.

[0018] Furthermore, according to the number of nodes in the substation area, the method for calculating the number of loop links of each node is:

[0019]

[0020] Among them, M is the number of nodes in the substation, K is the number of loop links of each node, A is the number of arrangements, and i is the number of nodes.

[0021] Furthermore, according to the uplink and downlink communication success rates and the average signal-to-noise ratio of the nodes, the method for obtaining the link quality of each loop link is:

[0022]

[0023] Among them, Q a is the link quality of the loop link, P(i) represents the number of loop hops of the i-th node, and P i,j is the success rate of uplink and downlink communication of the node, SNR i,j is the average signal-to-noise ratio of the node's uplink and downlink communication channels.

[0024] Furthermore, according to the link quality of each loop link, the method for calculating the link quality of the loop of each node is:

[0025] Obtain all loop links of each node, and take the loop link with the best link quality as the loop link quality of the node, then:

[0026] Q i =Max(Q a )=Max(Q1,Q2,…Q k ) (3)

[0027] Among them, Q i is the node ring link quality, Q a is the link quality of the loop link.

[0028] Furthermore, according to the link quality of each node loop, the method for calculating the link quality of the entire area node is:

[0029] Processing the uplink and downlink communication success rates of each node and the average signal-to-noise ratio of each node and the uplink and downlink communication channels;

[0030] The link quality of each area node is calculated by using the processed uplink and downlink communication success rate of each node, the average signal-to-noise ratio of each node and the uplink and downlink communication channels, and the link quality of the loop of each node;

[0031] According to the link quality of each area node, the link quality of the entire area node is obtained.

[0032] Furthermore, the method for processing the uplink and downlink communication success rates of each node is as follows:

[0033] P_m i，j =10*log 10 P i，j (4)

[0034] Among them, P_m i，j is the success rate of uplink and downlink communication of the processed node, P i，j is the success rate of node uplink and downlink communication;

[0035] The method for processing the average signal-to-noise ratio of each node to the uplink and downlink communication channels is:

[0036] SNR_dB i，j =10*log 10 SNR i，j (5)

[0037] Among them, SNR_dB i，j is the average signal-to-noise ratio of the uplink and downlink communication channels after processing, SNR i，j is the average signal-to-noise ratio of the communication channel of the node;

[0038] The method for calculating the link quality of the entire area node is to use the processed uplink and downlink communication success rate of each node, the average signal-to-noise ratio of each node and the uplink and downlink communication channels, and the link quality of each node's loop:

[0039]

[0040] Among them, Q Nis the link quality of the nodes in the entire area, N is the target time period, M is the number of nodes in the area, P (i) is the number of loop hops of the i-th node.

[0041] The present invention provides a link quality calculation system, comprising:

[0042] Area node acquisition module: used to obtain the number of area nodes;

[0043] Uplink and downlink communication success rate acquisition module: used to obtain the uplink and downlink communication success rate of each node;

[0044] An average signal-to-noise ratio acquisition module for uplink and downlink communication channels: used to acquire the average signal-to-noise ratio of each node and the uplink and downlink communication channels;

[0045] The link quality calculation module of the node loop is used to calculate the link quality of the loop of each node according to the uplink and downlink communication success rate of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node;

[0046] The entire inner area node link quality calculation module is used to calculate the entire area node link quality based on the link quality of the loop of each node.

[0047] A terminal device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0048] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The present invention provides a link quality calculation method, which obtains the number of nodes in the substation, the uplink and downlink communication success rate of each node, and the average signal-to-noise ratio of each node and the uplink and downlink communication channels; and calculates the link quality of the loop of each node according to the uplink and downlink communication success rate of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node; finally, according to the link quality of the loop of each node, the link quality of the entire substation node is realized. On the basis of the existing use of the uplink and downlink success rate between nodes to judge the communication quality of the entire substation, the present invention innovatively combines the signal-to-noise ratio on the actual physical line to achieve a comprehensive analysis of the link quality of the communication substation, and the method is universal and can be widely used in various types of substation communication networks, can effectively evaluate the link quality of the substation, and provide a basis for the optimization and improvement of the substation network, thereby improving power supply reliability and service quality.

[0051] The present invention provides a link quality calculation system. By setting a station area node acquisition module, an uplink and downlink communication success rate acquisition module, an uplink and downlink communication channel average signal-to-noise ratio acquisition module, a node loop link quality calculation module and an entire inner station area node link quality calculation module, the system can achieve the acquisition of the number of station area nodes, the uplink and downlink communication success rate of each node and the average signal-to-noise ratio of each node and the uplink and downlink communication channels; and calculate the link quality of the loop of each node according to the uplink and downlink communication success rate of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node; finally, according to the link quality of the loop of each node, the process of realizing the link quality of the entire station area node is realized. The system structure is simple and easy to operate, and the link quality of the communication station area can be accurately calculated.

[0052] The present invention provides a terminal device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above method are implemented, and the structure is simple and easy to implement.

[0053] A computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the above method are implemented and the computer program can be easily applied to various types of station area communications. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 The figure is a flow chart of a link quality calculation method of the present invention.

[0055] Figure 2 It is a structural diagram of a link quality calculation system of the present invention.

[0056] Figure 3 Schematic diagram of the link structure in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0060] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0061] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0062] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0064] See also Figure 1 The present invention discloses a link quality calculation method, comprising:

[0065] S1: Get the number of nodes in the substation; the number of nodes in the substation can be obtained from the number of nodes in 6.5.8.3.1 of the current "QGDW 10376.2-2019 Electricity Consumption Information Collection System Communication Protocol Part 2: Concentrator Local Communication Module Interface".

[0066] S2: Obtain the uplink and downlink communication success rates of each node; obtain the uplink and downlink communication success rates of the nodes by discovering the proxy site communication success rate and the proxy site downlink communication success rate in the list message of the MAC layer management message in the current "Dual-Mode Communication Interoperability Technical Specification Part 4-2: Data Link Layer Communication Protocol".

[0067] S3: Obtain the average signal-to-noise ratio of each node and the uplink and downlink communication channels; obtain the average signal-to-noise ratio of the node communication channel through the neighbor node channel information unit of the wireless discovery list message in the current "Dual-Mode Communication Interoperability Technical Specification Part 4-2: Data Link Layer Communication Protocol".

[0068] S4: Calculate the link quality of the loop of each node according to the uplink and downlink communication success rate of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node;

[0069] S4.1: According to the number of nodes in the substation area, the method for calculating the number of loop links of each node is:

[0070]

[0071] Among them, M is the number of nodes in the substation, K is the number of loop links of each node, A is the number of arrangements, and i is the number of nodes.

[0072] S4.2: According to the uplink and downlink communication success rates and the average signal-to-noise ratio of the node, the link quality method of each loop link is obtained as follows:

[0073]

[0074] Among them, Q a is the link quality of the loop link, P(i) represents the number of loop hops of the i-th node, and P i,j is the success rate of uplink and downlink communication of the node, SNR i,j is the average signal-to-noise ratio of the node's uplink and downlink communication channels.

[0075] S4.3: According to the link quality of each loop link, the link quality of each node loop is calculated as follows:

[0076] Obtain all loop links of each node, and take the loop link with the best link quality as the loop link quality of the node, then:

[0077] Q i =Max(Q a )=Max(Q1,Q2,…Q k ) (3)

[0078] Among them, Q i is the node ring link quality, Q ais the link quality of the loop link.

[0079] S5: Calculate the link quality of the entire area node according to the link quality of the loop of each node, specifically:

[0080] S5.1: Processing the uplink and downlink communication success rates of each node and the average signal-to-noise ratios of each node and the uplink and downlink communication channels. Specifically, the method for processing the uplink and downlink communication success rates of each node is:

[0081] P_m i，j =10*log 10 P i，j (4)

[0082] Among them, P_m i，j is the success rate of uplink and downlink communication of the processed node, P i，j is the success rate of node uplink and downlink communication;

[0083] The method for processing the average signal-to-noise ratio of each node to the uplink and downlink communication channels is:

[0084] SNR_dB i，j =10*log 10 SNR i，j (5)

[0085] Among them, SNR_dB i，j is the average signal-to-noise ratio of the uplink and downlink communication channels after processing, SNR i，j is the average signal-to-noise ratio of the communication channel of the node

[0086] S5.2: Using the processed uplink and downlink communication success rates of each node, the average signal-to-noise ratio of each node and the uplink and downlink communication channels, and the link quality of the loop of each node, the link quality method of each node in the station area is calculated as follows:

[0087]

[0088] Among them, Q N is the link quality of the nodes in the entire area, N is the target time period, M is the number of nodes in the area, P (i) is the number of loop hops of the i-th node;

[0089] S5.3: According to the link quality of each area node, the link quality of the entire area node is obtained.

[0090] See also Figure 3 , the actual communication network diagram of the area is taken as 4 nodes and 2 hops.

[0091] The success rate of uplink and downlink communication of the station area node is: The average signal-to-noise ratio of the node's uplink and downlink communication channels is:

[0092] The number of nodes in the substation area is 4. The number of loop links of the fourth node is calculated by formula (1) to be 5, which are:

[0093] According to formula (2), the link quality of each loop link is: Q1 = p 1,4 snr 1,4 p 4,1 snr 4,1 , Assume that the best link quality of the node is Max(Q a ) = Q1;

[0094] Taking 1 hour as the unit, calculate the link quality of the area within two hours, that is, N=2. The link quality of the area at the fourth node in the area after 2 hours is: This is used to calculate the link quality of the entire area node.

[0095] See also Figure 2 , a link quality calculation system, comprising:

[0096] Area node acquisition module: used to obtain the number of area nodes;

[0097] Uplink and downlink communication success rate acquisition module: used to obtain the uplink and downlink communication success rate of each node;

[0098] An average signal-to-noise ratio acquisition module for uplink and downlink communication channels: used to acquire the average signal-to-noise ratio of each node and the uplink and downlink communication channels;

[0099] The link quality calculation module of the node loop is used to calculate the link quality of the loop of each node according to the uplink and downlink communication success rate of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node;

[0100] The entire inner area node link quality calculation module is used to calculate the entire area node link quality based on the link quality of the loop of each node.

[0101] The present invention provides a terminal device including: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned method embodiments are implemented. Alternatively, when the processor executes the computer program, the functions of the modules / units in the above-mentioned device embodiments are implemented.

[0102] The computer program may be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to accomplish the present invention.

[0103] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0104] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0105] The memory may be used to store the computer programs and / or modules, and the processor implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory.

[0106] If the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and substitutions, and these modifications and substitutions are also within the scope of protection covered by the claims.

Claims

1. A link quality calculation method, characterized in that: include: Get the number of nodes in the area; Get the uplink and downlink communication success rate of each node; Obtain the average signal-to-noise ratio of each node and the uplink and downlink communication channels; Calculate the link quality of the loop of each node according to the uplink and downlink communication success rate of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node; According to the link quality of the loop of each node, the link quality of the entire area node is calculated.

2. The link quality calculation method according to claim 1, characterized in that: According to the uplink and downlink communication success rates of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node, the link quality of the loop of each node is calculated as follows: According to the number of nodes in the substation area, calculate the number of loop links of each node; According to the uplink and downlink communication success rates and average signal-to-noise ratios of the nodes, the link quality of each loop link is obtained; The link quality of the loop of each node is calculated according to the link quality of each loop link.

3. The link quality calculation method according to claim 2, characterized in that: According to the number of nodes in the substation area, the method for calculating the number of loop links of each node is: Among them, M is the number of nodes in the substation, K is the number of loop links of each node, A is the number of arrangements, and i is the number of nodes.

4. The link quality calculation method according to claim 2, characterized in that: According to the uplink and downlink communication success rates and the average signal-to-noise ratio of the node, the method for obtaining the link quality of each loop link is: Among them, Q a is the link quality of the loop link, P(i) represents the number of loop hops of the i-th node, and P i,j is the success rate of uplink and downlink communication of the node, SNR i,j is the average signal-to-noise ratio of the node's uplink and downlink communication channels.

5. The link quality calculation method according to claim 2, characterized in that: According to the link quality of each loop link, the method for calculating the link quality of the loop of each node is: Obtain all loop links of each node, and take the loop link with the best link quality as the loop link quality of the node, then: Q i =Max(Q a )=Max(Q1,Q2,…Q k ) (3) Among them, Q i is the node ring link quality, Q a is the link quality of the loop link.

6. The link quality calculation method according to claim 1, characterized in that: According to the link quality of each node loop, the method for calculating the link quality of the entire area node is: Processing the uplink and downlink communication success rates of each node and the average signal-to-noise ratio of each node and the uplink and downlink communication channels; The link quality of each area node is calculated by using the processed uplink and downlink communication success rate of each node, the average signal-to-noise ratio of each node and the uplink and downlink communication channels, and the link quality of the loop of each node; According to the link quality of each area node, the link quality of the entire area node is obtained.

7. The link quality calculation method according to claim 6, characterized in that: The method for processing the uplink and downlink communication success rates of each node is: P_m i，j =10*log 10 P i，j (4) Among them, P_m i，j is the success rate of uplink and downlink communication of the processed node, P i，j is the success rate of node uplink and downlink communication; The method for processing the average signal-to-noise ratio of each node to the uplink and downlink communication channels is: SNR_dB i，j =10*log 10 SNR i，j (5) Among them, SNR_dB i，j is the average signal-to-noise ratio of the uplink and downlink communication channels after processing, SNR i，j is the average signal-to-noise ratio of the communication channel of the node; The method for calculating the link quality of the entire area node is to use the processed uplink and downlink communication success rate of each node, the average signal-to-noise ratio of each node and the uplink and downlink communication channels, and the link quality of each node's loop: Among them, Q N is the link quality of the nodes in the entire area, N is the target time period, M is the number of nodes in the area, P (i) is the number of loop hops of the i-th node.

8. A link quality calculation system, characterized in that: include: Area node acquisition module: used to obtain the number of area nodes; Uplink and downlink communication success rate acquisition module: used to obtain the uplink and downlink communication success rate of each node; An average signal-to-noise ratio acquisition module for uplink and downlink communication channels: used to acquire the average signal-to-noise ratio of each node and the uplink and downlink communication channels; The link quality calculation module of the node loop is used to calculate the link quality of the loop of each node according to the uplink and downlink communication success rate of each node and the average signal-to-noise ratio of the uplink and downlink communication channels of each node; The entire inner area node link quality calculation module is used to calculate the entire area node link quality based on the link quality of the loop of each node.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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