CN116367206B - Medium covered node communication quality testing method and communication link construction method - Google Patents
Medium covered node communication quality testing method and communication link construction methodInfo
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- CN116367206B CN116367206B CN202310312939.0A CN202310312939A CN116367206B CN 116367206 B CN116367206 B CN 116367206B CN 202310312939 A CN202310312939 A CN 202310312939A CN 116367206 B CN116367206 B CN 116367206B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/06—Testing, supervising or monitoring using simulated traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/14—Network analysis or design
- H04L41/142—Network analysis or design using statistical or mathematical methods
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention discloses a medium coverage node communication quality testing method and a communication link construction method, which comprise the following steps of S1, establishing a model, S2, adjusting parameters, namely adjusting model parameters in a mode of fixing a single variable, wherein the model parameters comprise medium coverage thickness of a medium model and distance between a sending node model and a receiving node model, S3, running simulation, recording a communication result, analyzing and judging whether the communication condition of an environment monitoring node is good or not, S4, readjusting the parameters based on the communication result of S3, and sequentially repeating the step S2 and the step S3 for testing for a plurality of times to obtain a set of medium coverage thickness values of the node model and corresponding to a node distance range and a set of node distance values and corresponding to the medium coverage thickness range under the condition of communication. The invention aims at the test of the point-to-point communication performance under the coal rock coverage medium, and improves the reestablishment efficiency of the communication link between the nodes.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a medium coverage node communication quality testing method and a communication link construction method.
Background
The disasters such as underground coal mine gas explosion can destroy a pre-deployed wireless sensor monitoring network, and cause fatal influence on environment monitoring nodes. Under the influence of disasters, some environmental monitoring nodes cannot work normally due to damage of structures, parts and the like, and some nodes are not affected much by disasters, but are covered by coal-rock media such as coal-rock mass and the like or other media, in which case, communication of the nodes becomes a problem, and if a post-disaster network is to be reconstructed, the environmental monitoring nodes covered by the coal-rock media are difficult to find, so that the first step of network reconstruction is that the discovery work of the nodes is difficult to carry out.
Thus, understanding the survival of post-disaster environmental monitoring nodes and the communication between surviving nodes is important. If the field experiment is carried out on a real site, huge manpower and material resources are consumed, serious waste is caused by experimental materials after the experiment, and meanwhile, the underground disaster working condition cannot be well reproduced by the ground experiment. Based on this, research by means of simulation is almost an ideal solution.
Currently, there is no communication simulation for coal and rock coverage nodes. Therefore, the invention provides a simulation method for the coal rock coverage thickness and the node communication distance based on network simulation software, which hopes to provide basis for the reconstruction node discovery of the post-disaster network and provide information support for emergency rescue.
Disclosure of Invention
The invention aims to disclose a medium coverage node communication quality testing method and a communication link construction method, wherein the relation among the coal rock coverage thickness, the node spacing and the communication condition is obtained by constructing a post-disaster node simulation frame and adopting a parameter adjustment mode, and the simulation method is constructed so as to reduce the resource waste caused by ground experiments and the inconvenience of the ground experiments, provide data support for the reconstruction of communication links among the ground nodes and improve the reconstruction efficiency.
In order to achieve the above object, the present invention provides a method for testing communication quality of a medium coverage node, comprising the steps of:
s1, establishing a model, namely selecting a communication mode between a medium type covered by an environment monitoring node and the environment monitoring node, preliminarily selecting a medium coverage thickness value of the environment monitoring node, and constructing a network model based on network simulation software for communication test of the environment monitoring node;
S2, parameter adjustment, namely adjusting model parameters in a mode of fixing a single variable, wherein the model parameters comprise the medium coverage thickness of a medium model and the distance between a transmitting node model and a receiving node model;
S3, running simulation, recording a communication result, and judging whether the communication condition of the environment monitoring node is good or not based on the analysis of the communication result under single simulation;
And S4, readjusting parameters based on the communication result of the step S3, sequentially repeating the step S2 and the step S3, and testing for a plurality of times to obtain a set of the node model with the medium coverage thickness value corresponding to the node spacing range and a set of the node spacing value corresponding to the medium coverage thickness range under the communication condition.
As a further improvement of the present invention, the network model includes:
a transmitting node model having a sensor for environmental monitoring capable of transmitting an environmental monitoring signal;
The receiving node model is used for receiving the environment monitoring signal sent by the sending node model;
a media model coupled to the sending node model for transmitting media attributes;
And a radio model for data communication between the transmitting node model and the receiving node model.
As a further improvement of the invention, the medium is any one or more of different types of coal, rock, coal-rock mass and particulate solid medium in the non-coal field.
As a further improvement of the invention, the medium is a coal rock medium model, the coal rock medium model comprises a coal rock medium definition and a coal rock model construction, the coal rock medium definition comprises definition of the resistivity, the relative permittivity and the relative permeability of coal rock material parameters, and the coal rock model construction comprises construction of the position, the shape and the material of the coal rock medium.
As a further improvement of the invention, the network simulation software is omnet++.
As a further improvement of the invention, in the model establishment process of the step S1, simulation establishment of two conditions of complete coverage and incomplete coverage is realized by setting a contact gap between a medium and an environment monitoring node.
The invention also discloses a method for constructing the communication link between the multiple nodes under the medium coverage, which is based on a method for testing the communication quality of the medium coverage nodes and comprises the following steps:
Firstly, a discovery node under the condition of no medium coverage is firstly introduced, a first medium coverage node which can form communication connection with the discovery node is searched, when the discovery node is in communication connection with the first medium coverage node, the coordinate of the discovery node is taken as a coordinate origin, and the direction k of the discovery node at the moment is recorded by utilizing a node antenna;
Secondly, based on the result obtained in the step S4, preliminarily obtaining a coverage thickness range Rx of the first medium coverage node according to the d value, and simultaneously establishing a circle equation taking the discovery node as a circle center as x 2+y2＝d2;
The equation in the direction area where the first medium coverage node is located is y=kx;
the two equations are combined, and the coordinates of the first medium coverage node can be obtained;
Thirdly, enabling the discovery node to move along the opposite direction of the direction area where the first medium coverage node is located until communication with the first medium coverage node is interrupted, and calculating the distance d 2 at the moment;
According to the result of the step S4, the node coverage thickness range Ry corresponding to d 2 can be known, the maximum coverage thickness value of the first medium coverage node is obtained based on the intersection between Rx and Ry, and the maximum communication range of the first medium coverage node is finally determined according to the coordinates and the maximum coverage thickness value of the first medium coverage node;
Fourth, the discovery node is continuously utilized to continuously search other medium coverage nodes within the maximum communication range, and communication link connection between the first medium coverage node and the other medium coverage nodes is established through the discovery node.
Compared with the prior art, the invention has the beneficial effects that:
(1) A method for testing communication quality of medium covered node includes providing reference for scientific research simulation by using software from model establishment, parameter adjustment, operation simulation to result analysis, eliminating redundant part of model constructed by the method and saving calculation resource. According to the invention, aiming at the test of the point-to-point communication performance under the coal rock covering medium, the complex factors of ground experiment operation can be omitted, and the waste of resources after the experiment can be avoided.
(2) Compared with any discovery work performed by the discovery node, the communication link construction method utilizes the set of the medium coverage thickness value of the node model and the corresponding set relation of the node spacing value and the medium coverage thickness range to enable the discovery node to perform node discovery in the catastrophe area, and the maximum communication range and the neighbor table of the first medium coverage node are provided, so that the node discovery efficiency can be improved, and the network reconstruction time can be reduced.
Drawings
FIG. 1 is a diagram of a network model framework in a method for testing communication quality of a medium coverage node according to the present invention;
FIG. 2 is a simulation construction of two cases of complete coverage and incomplete coverage between a medium and an environmental monitoring node in a medium coverage node communication quality test method of the present invention;
fig. 3 is a flow chart of a method for testing communication quality of a medium coverage node according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present invention, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present invention by those skilled in the art.
Please refer to fig. 1 to 3 for a specific embodiment of a method for testing communication quality of a medium coverage node and a method for constructing a communication link according to the present invention.
Embodiment one:
A method for testing communication quality of medium coverage nodes includes setting up a model, selecting communication mode between medium type covered by environment monitoring nodes and environment monitoring nodes based on actual catastrophe condition, initially selecting medium coverage thickness value of environment monitoring nodes, constructing network model based on network simulation software for communication test of environment monitoring nodes, setting up parameter, adjusting model parameter by mode of fixed single variable, recording communication result by running simulation, analyzing and judging whether communication condition of environment monitoring nodes is good or not based on communication result of single simulation, readjusting parameter based on communication result of S3, repeating step S2 and step S3 in sequence, and testing multiple times to obtain set corresponding to medium coverage thickness value and node spacing range of node model and set corresponding to medium coverage thickness range of node model under communication condition.
The network model comprises a transmitting node model, a receiving node model, a medium model and a radio model, wherein the transmitting node model is used for transmitting environment monitoring signals of an environment monitoring node, the environment monitoring signals comprise signals such as temperature, impact force, temperature, humidity and methane gas, the receiving node model is used for receiving the environment monitoring signals transmitted by the transmitting node model, the medium model is covered on the transmitting node model in a coupling mode with the transmitting node model, and the radio model is used for data communication between the transmitting node model and the receiving node model. The relationship of the four is that under the large framework of a network model, a transmitting node model, a receiving node model, a coal-rock medium model (physical environment model) and a radio model are embedded, and meanwhile, the radio model is coupled into the node model, and the model part corresponds to a specific module as shown in fig. 2. The transmitting and receiving nodes select SensorNode, respectively, the radio model selects 802.15.4 narrowband communications, and the physical environment involves a coal-rock coverage medium. The medium is a coal rock medium model, the coal rock medium model comprises coal rock medium definition and coal rock model construction, the coal rock medium definition comprises coal rock material parameter resistivity, relative dielectric constant and relative magnetic permeability, and the coal rock model construction comprises construction of medium position, shape and material.
For a complete construction of the model, the transmitting node model is able to generate a transmitting data packet at equal time intervals, the transmitting data packet having a destination address and a data packet byte length, the receiving node model being only able to receive the data packet.
The transmitting node model is capable of generating a transmitting data packet at equal time intervals, the transmitting data packet having a destination address and a data packet byte length, and the receiving node model is only capable of receiving the data packet.
In the model building process of the step S1, simulation building of two conditions of complete coverage and incomplete coverage is realized by setting a contact gap between a medium and an environment monitoring node.
The network model also includes a visualization model. The network simulation software is OMNeT++, the OMNeT++ is used as an open source software, and the network simulation software is used by vast scientific researchers due to the characteristics of modularization and modularization.
Before simulation, the communication mode of the node is determined according to the simulation purpose, the invention selects 802.15.4 narrowband communication, and can select communication modes with other communication frequencies, then selects the covering medium of the node, searches the related material parameters and determines the range of the preliminary covering thickness, and finally, a preliminary result is needed to be compared with the simulation result through theoretical analysis.
Embodiment two:
The medium is any one or more of different types of coal, rock, coal rock mass and granular solid medium in the non-coal field. The coal rock medium of the embodiment is replaced by other medium, and the 802.15.4 narrowband communication is replaced by other communication mode.
Firstly, introducing a discovery node under the condition of no medium coverage, searching a first medium coverage node which can form communication connection with the discovery node, when the discovery node is in communication connection with the first medium coverage node, taking the coordinate of the discovery node as a coordinate origin, and recording the discovery node direction k by using a node antenna; based on the time difference principle, obtaining the distance d, d= (t 2-t1) v/2 between the discovery node and the first medium coverage node, wherein t 1 represents the time when the discovery node transmits signals, t 2 represents the time when the discovery node receives signals, v represents the propagation speed of electromagnetic waves, secondly, based on the result obtained in the step S4, initially obtaining the coverage thickness range Rx of the first medium coverage node according to the d value, simultaneously establishing a round equation taking the discovery node as a center as x 2+y2＝d2, wherein the equation in the direction area where the first medium coverage node is located is y=kx, and the two equations are combined to obtain the coordinates of the first medium coverage node, thirdly, moving the discovery node along the reverse direction of the direction area where the first medium coverage node is located until the communication with the first medium coverage node is interrupted, calculating the distance d 2 at the moment, based on the result of the step S4, knowing the coverage thickness range Ry of the node corresponding to d 2, obtaining the maximum thickness value of the first medium coverage node according to the intersection between Rx and Ry, determining the maximum thickness of the first medium coverage node and the maximum thickness of the first medium coverage node according to the maximum thickness range of the first medium coverage node, and continuing to search for other medium coverage nodes within the maximum communication range by using the discovery node, and establishing communication link connection between the first medium coverage node and the other medium coverage nodes through the discovery node.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The method for testing the communication quality of the medium coverage node is characterized by comprising the following steps of:
s1, establishing a model, namely selecting a communication mode between a medium type covered by an environment monitoring node and the environment monitoring node, preliminarily selecting a medium coverage thickness value of the environment monitoring node, and constructing a network model based on network simulation software for communication test of the environment monitoring node;
S2, parameter adjustment, namely adjusting model parameters in a mode of fixing a single variable, wherein the model parameters comprise the medium coverage thickness of a medium model and the distance between a transmitting node model and a receiving node model;
S3, running simulation, recording a communication result, and judging whether the communication condition of the environment monitoring node is good or not based on the analysis of the communication result under single simulation;
And S4, readjusting parameters based on the communication result of the step S3, sequentially repeating the step S2 and the step S3, and testing for a plurality of times to obtain a set of the node model with the medium coverage thickness value corresponding to the node spacing range and a set of the node spacing value corresponding to the medium coverage thickness range under the communication condition.
2. The method for testing communication quality of a medium coverage node according to claim 1, wherein the network model comprises:
a transmitting node model having a sensor for environmental monitoring capable of transmitting an environmental monitoring signal;
The receiving node model is used for receiving the environment monitoring signal sent by the sending node model;
a media model coupled to the sending node model for transmitting media attributes;
And a radio model for data communication between the transmitting node model and the receiving node model.
3. The method for testing communication quality of medium covered nodes according to claim 1, wherein the medium is any one or more of different types of coal, rock, coal-rock mass and granular solid medium in non-coal field.
4. A method for testing communication quality of a medium coverage node according to claim 3, wherein the medium is a coal-rock medium model, the coal-rock medium model comprises a coal-rock medium definition and a coal-rock model construction, the coal-rock medium definition comprises definition of resistivity, relative permittivity and relative permeability of coal-rock material parameters, and the coal-rock model construction comprises construction of position, shape and material of the coal-rock medium.
5. The method for testing communication quality of medium coverage node according to claim 1, wherein the network simulation software is omnet++.
6. The method for testing communication quality of medium coverage node according to claim 1, wherein in the model building process of step S1, simulation building of both complete coverage and incomplete coverage is realized by setting a contact gap between the medium and the environment monitoring node.
7. A communication link construction method based on the medium coverage node communication quality test method according to claim 1, characterized by comprising the steps of:
Firstly, a discovery node under the condition of no medium coverage is firstly introduced, a first medium coverage node which can form communication connection with the discovery node is searched, when the discovery node is in communication connection with the first medium coverage node, the coordinate of the discovery node is taken as a coordinate origin, and the direction k of the discovery node at the moment is recorded by utilizing a node antenna;
Secondly, based on the result obtained in the step S4, preliminarily obtaining a coverage thickness range Rx of the first medium coverage node according to the d value, and simultaneously establishing a circle equation taking the discovery node as a circle center as x 2+y2＝d2;
The equation in the direction area where the first medium coverage node is located is y=kx;
the two equations are combined, and the coordinates of the first medium coverage node can be obtained;
Thirdly, enabling the discovery node to move along the opposite direction of the direction area where the first medium coverage node is located until communication with the first medium coverage node is interrupted, and calculating the distance d 2 at the moment;
According to the result of the step S4, the node coverage thickness range Ry corresponding to d 2 can be known, the maximum coverage thickness value of the first medium coverage node is obtained based on the intersection between Rx and Ry, and the maximum communication range of the first medium coverage node is finally determined according to the coordinates and the maximum coverage thickness value of the first medium coverage node;
Fourth, the discovery node is continuously utilized to continuously search other medium coverage nodes within the maximum communication range, and communication link connection between the first medium coverage node and the other medium coverage nodes is established through the discovery node.
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| JP3902554B2 (en) * | 2003-02-07 | 2007-04-11 | 株式会社セルクロス | COMMUNICATION DEVICE, COMMUNICATION DEVICE, POWER SUPPLY DEVICE, AND POWER SUPPLY DEVICE |
| US9392466B2 (en) * | 2012-12-06 | 2016-07-12 | Level 3 Communications, Llc | System and methods for obtaining ubiquitous network coverage |
| CN103052081B (en) * | 2012-12-20 | 2016-05-18 | 大唐移动通信设备有限公司 | Network coverage planing method and the device of evolution communication systems |
| CN113132965B (en) * | 2021-03-30 | 2022-01-11 | 中国矿业大学 | An emergency rescue sensor network test platform and its test method |
| CN113411221B (en) * | 2021-06-30 | 2022-11-11 | 中国南方电网有限责任公司 | Power communication network fault simulation verification method, device, equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102025408A (en) * | 2009-09-23 | 2011-04-20 | 华为技术有限公司 | Method, device and system for establishing channel for transmitting wireless signals |
| CN103235382A (en) * | 2013-05-14 | 2013-08-07 | 中煤科工集团武汉设计研究院 | Method for long-distance coal conveying pipeline and communication cable to pass through ditch and water pond in large excavating way |
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