CN111093147A - Ultraviolet light ad hoc network three-dimensional node positioning method - Google Patents

Ultraviolet light ad hoc network three-dimensional node positioning method Download PDF

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CN111093147A
CN111093147A CN201911347905.5A CN201911347905A CN111093147A CN 111093147 A CN111093147 A CN 111093147A CN 201911347905 A CN201911347905 A CN 201911347905A CN 111093147 A CN111093147 A CN 111093147A
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node
ultraviolet light
positioning
nodes
dimensional
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宋鹏
杨永坤
苏彩霞
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Xian Polytechnic University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

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  • Computer Networks & Wireless Communication (AREA)
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  • Physics & Mathematics (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses an ultraviolet light ad hoc network three-dimensional node positioning method, which comprises the following steps: step 1: randomly establishing A, B, C, D four initial anchor nodes and an unknown node P in a three-dimensional coordinate system; step 2: performing initial positioning based on the step 1 to obtain initial anchor node coordinates; and step 3: realizing a direct-view communication link between nodes; and 4, step 4: solving the Euclidean distance between the unknown node and the initial anchor node according to the power of the initial anchor node and the power of the unknown node; and 5: and positioning the external unknown node according to the three-surface node positioning method to obtain the positioning information of the unknown node. The invention utilizes the ultraviolet light emitting device and the ultraviolet light mobile ad hoc network node device to research the ultraviolet light ad hoc network node positioning method in the three-dimensional space and provide position information for an access layer and a routing layer in an ultraviolet light network, so that the ultraviolet light network user can conveniently schedule and command the nodes and simultaneously provide possibility for high-quality and high-efficiency ultraviolet light communication.

Description

Ultraviolet light ad hoc network three-dimensional node positioning method
Technical Field
The invention belongs to the technical field of ultraviolet light communication, and particularly relates to an ultraviolet light ad hoc network three-dimensional node positioning method.
Background
The wireless ultraviolet communication is a novel wireless optical communication mode, mainly carries out information transmission by means of absorption and scattering effects of molecules, aerosol and particles in the atmosphere on photons, has the advantages of high confidentiality, low background noise, strong anti-interference capability, all-weather, all-around work, non-direct-view communication and the like, can be applied to near-distance confidential communication, and is particularly suitable for wireless confidential communication among armor clusters or ships under the electromagnetic silence condition. With the continuous expansion of the application field, the point-to-point small-range communication is difficult to meet the requirements of practical application, and an ultraviolet communication network is urgently needed to be established. The node positioning technology is one of the key technologies of the wireless ultraviolet light mobile ad hoc network communication system, and is also the basis for designing a routing protocol. In order to be able to provide more node location information to the access and routing layers and ultimately obtain efficient, high quality wireless communications. Therefore, the research on the node positioning method applicable to the wireless ultraviolet communication network has certain significance.
Disclosure of Invention
The invention aims to provide an ultraviolet light ad hoc network three-dimensional node positioning method, which utilizes an ultraviolet light emitting device and an ultraviolet light mobile ad hoc network node device to research the ultraviolet light ad hoc network node positioning method in a three-dimensional space and provides position information for an access layer and a routing layer in an ultraviolet light network, so that an ultraviolet light network user can conveniently schedule and command nodes and simultaneously provide possibility for high-quality and high-efficiency ultraviolet light communication.
The technical scheme of the invention is as follows: an ultraviolet light ad hoc network three-dimensional node positioning method comprises the following steps:
step 1: randomly establishing A, B, C, D four initial anchor nodes and an unknown node P in a three-dimensional coordinate system;
step 2: performing initial positioning based on the step 1 to obtain initial anchor node coordinates;
and step 3: realizing a direct-view communication link between nodes;
and 4, step 4: solving the Euclidean distance between the unknown node and the initial anchor node according to the power of the initial anchor node and the power of the unknown node;
and 5: and positioning the external unknown node according to the three-surface node positioning method to obtain the positioning information of the unknown node.
The invention is also characterized in that:
a, B, C, D in the step 1 are all ultraviolet LED emitting devices with 720-degree rotation adjusting holders, and the unknown node P is a photomultiplier receiving device with the 720-degree rotation adjusting holders.
The specific process of the step 2 is as follows:
and realizing effective wireless ultraviolet light communication in a three-dimensional coordinate system, and inquiring A, B, C, D four initial anchor nodes to obtain initial anchor node coordinates.
The specific process of the step 3 is as follows:
setting the three-dimensional space formed by the three-dimensional coordinate system to be 1000m3At 1000m3When the unknown node P with the photomultiplier is positioned in the three-dimensional space, the direct-view communication link can be realized by judging the voltage of the photomultiplier receiving device, and the 720-degree rotary adjusting holder is adjusted to find the maximum voltage value in the voltage change range, namely the direct-view communication link can be judged.
The specific process of the step 4 is as follows:
the given received power end power can be increased by Pr＝UgE/(RgηdgηfgGge)，PrFor receiving end power, U is the voltage across the resistor, E is the energy of a single photon, and R is the resistor ηdFor the photoelectric conversion efficiency of the photomultiplier tube for incident light of this wavelength, ηfIs the transmittance of the filter to ultraviolet light of that wavelength, G is the photomultiplier gain, e is the electron charge amount,
distance between two nodes passes
Figure BDA0002333906130000031
d represents the communication distance between the master and slave nodes, PtIs the emission power of ultraviolet light, ArIs the receiving aperture area, k, of the ultraviolet light receiving deviceeIs the atmospheric extinction coefficient, PrIs the optical power received by the receiving end.
The invention has the beneficial effects that:
the invention adopts a three-surface node positioning method, is suitable for an Ultraviolet (UV) mobile ad hoc network node device, has higher precision to obtain the relative position of an unknown node for three-dimensional multi-nodes, and the accuracy of non-coplanar ultraviolet node positioning directly influences the communication speed of an ultraviolet communication network; the invention utilizes the ultraviolet light emitting device and the ultraviolet light mobile ad hoc network node device to research the ultraviolet light ad hoc network node positioning method in the three-dimensional space and provide position information for an access layer and a routing layer in an ultraviolet light network, so that the ultraviolet light network user can conveniently schedule and command the nodes and simultaneously provide possibility for high-quality and high-efficiency ultraviolet light communication.
Drawings
FIG. 1 is a three-dimensional node positioning model diagram of an ultraviolet Ad hoc network;
FIG. 2 is a comparison of three-sided nodal positioning and nodal reference location;
FIG. 3 is a graph of positioning error for three-sided node positioning in the direction X, Y, Z;
FIG. 4 is a three-sided nodal positioning error map.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses an ultraviolet light ad hoc network three-dimensional node positioning method, which comprises the following steps:
step 1: as shown in fig. 1, four initial anchor nodes and an unknown node P are arbitrarily established A, B, C, D in the three-dimensional coordinate system; wherein, A, B, C, D is the ultraviolet LED emitter that has 720 degrees rotation regulation cloud platforms, unknown node P is for having the photomultiplier receiving arrangement of 720 degrees rotation regulation cloud platforms, and 720 degrees rotation regulation cloud platforms are ordinary single opposition machine A-frame.
Step 2: performing initial positioning based on the step 1 to obtain initial anchor node coordinates;
specifically, for realizing effective wireless ultraviolet light communication in a three-dimensional coordinate system, A, B, C, D four initial anchor nodes are inquired to obtain initial anchor node coordinates.
And step 3: realizing a direct-view communication link between nodes;
the method specifically comprises the following steps: setting the three-dimensional space formed by the three-dimensional coordinate system to be 1000m3At 1000m3When the unknown node P with the photomultiplier is positioned in the three-dimensional space, the direct-view communication link can be realized by judging the voltage of the photomultiplier receiving device, and the 720-degree rotary adjusting holder is adjusted to find the maximum voltage value in the voltage change range, namely the direct-view communication link can be judged.
And 4, step 4: solving the Euclidean distance between the unknown node and the initial anchor node according to the power of the initial anchor node and the power of the unknown node;
the method specifically comprises the following steps: the given received power end power can be increased by Pr＝UgE/(RgηdgηfgGge)，PrFor receiving end power, U is the voltage across the resistor, E is the energy of a single photon, and R is the resistor ηdFor the photoelectric conversion efficiency of the photomultiplier tube for incident light of this wavelength, ηfIs the transmittance of the filter to ultraviolet light of that wavelength, G is the photomultiplier gain, e is the electron charge amount,
distance between two nodes passes
Figure BDA0002333906130000041
d represents the communication distance between the master and slave nodes, PtIs the emission power of ultraviolet light, ArIs the receiving aperture area, k, of the ultraviolet light receiving deviceeIs the atmospheric extinction coefficient, PrIs the optical power received by the receiving end.
And 5: foreign unknown nodes are processed according to the three-surface node positioning method
And (5) line positioning to obtain positioning information of unknown nodes.
By the aid of the fixed anchor node coordinates and the Euclidean distance between each anchor node and the unknown node, the external unknown node can be positioned according to the three-surface node positioning method, and positioning information of the unknown node is obtained. The coordinates (x) of P can be obtainedp,yp,zp) The expression is as follows:
Figure BDA0002333906130000051
Figure BDA0002333906130000052
Figure BDA0002333906130000053
wherein (x)A,yA,zA)，(xB,yB,zB)，(xC,yC,zC)，(xD,yD,zD) For artificially specified anchor node coordinates, (
Figure BDA0002333906130000054
) And (4) connecting the two anchor nodes for the unknown nodes.
The method is subjected to simulation experiment
Simulation conditions are as follows: when the simulation is carried out, the nodes are distributed in a 150m multiplied by 100m three-dimensional space, the unknown node moves at a constant speed in the specified three-dimensional space, and the beacon node and the unknown node are in a direct-view communication state. The coordinates of the master node A, B, C, D are set to (0,0,80), (0,100,20), (100,0,20), and (100, 80), respectively, and the relative distance measurement errors are assumed to follow a gaussian distribution with a mean of 2m and a variance of 0.5 m. The P to A, B, C, D distance is derived from the received signal strength, L for eachAP、LBP、LCP、LDPRepresents, changes LAP、LBP、LCPAnd LDPAnd (4) simulating and analyzing the position of the unknown node P under different measuring distance conditions.
Fig. 2 is a comparison graph of three-sided node positioning and node reference positions, wherein ○ represents the position of a master node, ● represents the true position of an unknown node, and it represents the position of the unknown node after positioning, and there are 20 unknown nodes in total, and the positioning coverage rate is 100%.
FIG. 3 is a comparison graph of positioning error of three-sided node positioning in direction X, Y, Z. As can be seen from fig. 3, the absolute positioning errors of the three-sided node positioning in the X, Y, Z direction are 0.7660m, 0.6456m and 0.8572m, respectively.
Fig. 4 is a three-plane node positioning error graph, and it can be known from fig. 4 that the root mean square error of a node fluctuates up and down at 1.5m, and the absolute positioning error of the three-plane node positioning is calculated to be 1.7269m, which indicates that the method is suitable for the ultraviolet light communication system with high distance measurement precision.
The invention adopts a three-surface node positioning method, is suitable for an Ultraviolet (UV) mobile ad hoc network node device, has higher precision to obtain the relative position of an unknown node for three-dimensional multi-nodes, and the accuracy of non-coplanar ultraviolet node positioning directly influences the communication speed of an ultraviolet communication network; the invention utilizes the ultraviolet light emitting device and the ultraviolet light mobile ad hoc network node device to research the ultraviolet light ad hoc network node positioning method in the three-dimensional space and provide position information for an access layer and a routing layer in an ultraviolet light network, so that the ultraviolet light network user can conveniently schedule and command the nodes and simultaneously provide possibility for high-quality and high-efficiency ultraviolet light communication.

Claims (5)

1. An ultraviolet light ad hoc network three-dimensional node positioning method is characterized by comprising the following steps:
step 1: randomly establishing A, B, C, D four initial anchor nodes and an unknown node P in a three-dimensional coordinate system;
step 2: performing initial positioning based on the step 1 to obtain initial anchor node coordinates;
and step 3: realizing a direct-view communication link between nodes;
and 4, step 4: solving the Euclidean distance between the unknown node and the initial anchor node according to the power of the initial anchor node and the power of the unknown node;
and 5: and positioning the external unknown node according to the three-surface node positioning method to obtain the positioning information of the unknown node.
2. The method as claimed in claim 1, wherein A, B, C, D in step 1 are all uv LED emitting devices with 720 degree rotation adjusting holders, and the unknown node P is a photomultiplier receiving device with 720 degree rotation adjusting holders.
3. The method for positioning the three-dimensional nodes of the ultraviolet Ad hoc network according to claim 2, wherein the specific process of the step 2 is as follows:
and realizing effective wireless ultraviolet light communication in a three-dimensional coordinate system, and inquiring A, B, C, D four initial anchor nodes to obtain initial anchor node coordinates.
4. The method for positioning the three-dimensional nodes of the ultraviolet Ad hoc network according to claim 3, wherein the specific process of the step 3 is as follows:
setting the three-dimensional space formed by the three-dimensional coordinate system to be 1000m3At 1000m3When an unknown node P with a photomultiplier is positioned, the direct-view communication link can be realized by judging the voltage of a photomultiplier receiving device, and the 720-degree rotary adjusting holder is adjusted to find the maximum voltage value in the voltage change range, namely, the direct-view communication link can be judged and realized.
5. The method for positioning the three-dimensional nodes of the ultraviolet Ad hoc network according to claim 4, wherein the specific process of the step 4 is as follows:
the given received power end power can be increased by Pr＝UgE/(RgηdgηfgGge)，PrFor receiving end power, U is the voltage across the resistor, E is the energy of a single photon, and R is the resistor ηdFor the photoelectric conversion efficiency of the photomultiplier tube for incident light of this wavelength, ηfIs the transmittance of the filter to ultraviolet light of that wavelength, G is the photomultiplier gain, e is the electron charge amount,
distance between two nodes passes
Figure FDA0002333906120000021
d represents the communication distance between the master and slave nodes, PtIs the emission power of ultraviolet light, ArIs the receiving aperture area, k, of the ultraviolet light receiving deviceeIs the atmospheric extinction coefficient, PrIs the optical power received by the receiving end.
CN201911347905.5A 2019-12-24 2019-12-24 Ultraviolet light ad hoc network three-dimensional node positioning method Pending CN111093147A (en)

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Publication number Priority date Publication date Assignee Title
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CN115327475A (en) * 2022-10-17 2022-11-11 中国人民解放军国防科技大学 System, method and equipment for positioning cluster receiving end based on ultraviolet light scattering communication

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111884719A (en) * 2020-06-30 2020-11-03 西安工程大学 Master-slave node based on wireless ultraviolet communication system and alignment method
CN115327475A (en) * 2022-10-17 2022-11-11 中国人民解放军国防科技大学 System, method and equipment for positioning cluster receiving end based on ultraviolet light scattering communication

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