CN109728852A - Underwater visible light communication device and underwater visible light communication method - Google Patents
Underwater visible light communication device and underwater visible light communication method Download PDFInfo
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- CN109728852A CN109728852A CN201910188720.8A CN201910188720A CN109728852A CN 109728852 A CN109728852 A CN 109728852A CN 201910188720 A CN201910188720 A CN 201910188720A CN 109728852 A CN109728852 A CN 109728852A
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- visible light
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- light communication
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Abstract
The present invention relates to technical field of visible light communication more particularly to a kind of underwater visible light communication device and underwater visible light communication methods.The underwater visible light communication device includes topology network architecture, the topology network architecture includes an aggregation node and multiple child nodes, wherein: the aggregation node includes the first transceiver module, and first transceiver module is used to transmit the first optical signal to the child node and receives the second optical signal that the child node is fed back；The child node includes signal acquisition module and the second transceiver module, and the signal acquisition module is for acquiring underwater multi-media signal；Second transceiver module connects the signal acquisition module, for being transmitted to the aggregation node after the multi-media signal is converted to second optical signal.The present invention realizes the underwater high-speed transfer of multi-media signal, and improves the reliability of underwater visible light communication.
Description
Technical field
The present invention relates to technical field of visible light communication more particularly to a kind of underwater visible light communication devices and underwater visible
Optical communication method.
Background technique
Visible light communication (Visible Light Communication, VLC) is in light emitting diode (Light
Emitting Diode, LED) etc. technically grow up the novel, short distance of one kind, high speed wireless communication technique.It with
LED is as light source, imperceptible by sending naked eyes, the flashing of high speed light and shade visible using atmosphere or water as medium is taught
Optical signal transmits information, completes photoelectric conversion using photodiode (Photodiode, PD) in receiving end, then carries out electricity
The transmitting of information is realized in the reception of signal, regeneration, demodulation.Compared with conventional wireless technology for radio frequency, VLC includes energy consumption
The advantages such as low, procuring equipment is few, meet national energy conservation and emission reduction strategy；No electromagnetic pollution, it is seen that optical band and radiofrequency signal not phase
Mutually interference, to eye-safe, the frequency spectrum advantage i.e. usable without authorization；Meanwhile information security field being suitble to use, as long as hiding
Visible light is blocked, the information in VLC communication network would not leak, and have highly confidential property.For these reasons, it is seen that light is logical
Letter is acknowledged as the communication technology most with prospects, it has also become research hotspot both domestic and external.
Currently, expert and scholar focus primarily on high-speed VLC device for the research emphasis of visible light communication both at home and abroad
Develop and special environment condition under VLC device using upper.In terms of the development of speeder, VLC communication device is from initial
The transmission rate of several million bits/s to a few Ji bits/s are constantly promoted, and have reached the surprising speed of offline Ji bits/s up to a hundred now
Rate, development prospect are very tempting.Visible light has been disclosed in application aspect in particular circumstances, research achievement both domestic and external
Communicate auto communication, wireless location, robot control, subsurface communication, in terms of application.
Wherein, submarine optical communication technology overcomes the problems such as traditional water sound communication technique low rate, low bandwidth, high delay,
And the disadvantages of avoiding the high directionality of underwater laser communication, Gao Chengben.But existing submarine optical communication technology is regarding
Frequently, the multi-media signals such as audio transmission aspect remains that transmission efficiency is low, the problem of transmission reliability difference.
Therefore, the efficiency of transmission for how improving submarine optical communication device is a technical problem to be solved urgently.
Summary of the invention
The present invention provides a kind of underwater visible light communication device and underwater visible light communication method, for solving existing water
Lower visible light communication device the problem of transmission efficiency is low.
To solve the above-mentioned problems, the present invention provides a kind of underwater visible light communication device, including topology network architecture,
The topology network architecture includes an aggregation node and multiple child nodes, in which:
The aggregation node includes the first transceiver module, and first transceiver module is used for child node transmission first
Optical signal and the second optical signal for receiving the child node feedback；
The child node includes signal acquisition module and the second transceiver module, and the signal acquisition module is underwater for acquiring
Multi-media signal；Second transceiver module connects the signal acquisition module, for being converted to the multi-media signal
The aggregation node is transmitted to after second optical signal.
Preferably, the aggregation node further include:
First memory module is used for storage and multiple child nodes multiple identification informations correspondingly；
First processing module connects first memory module and first transceiver module, for modulating described first
Transceiver module emits first optical signal, and first optical signal includes the identification information of target child node.
Preferably, the child node includes:
Second memory module, for storing the identification information of the child node；
Second processing module connects second memory module and the second transceiver module, for judging second transmitting-receiving
The mark stored in identification information included in first optical signal that module receives and second memory module is believed
Whether breath matches, if so, modulation second transceiver module transmits third optical signal to the aggregation node, with confirmation and institute
It states aggregation node and establishes data connection.
Preferably, first transceiver module includes the first blue light-emitting diode and the first photodiode；
Second transceiver module includes the second blue light-emitting diode and the second photodiode.
Preferably, the topology network architecture is star topology network structure, and the aggregation node is the star topology
The center of network structure.
To solve the above-mentioned problems, the present invention also provides a kind of underwater visible light communication method, include the following steps:
A topology network architecture is provided, the topology network architecture includes an aggregation node and multiple child nodes；
The aggregation node sends the first optical signal to the child node；
The child node, which receives, acquires underwater multi-media signal after first optical signal, and by the multi-media signal
The aggregation node is transmitted to after being converted to the second optical signal.
Preferably, it is stored in the aggregation node and multiple child nodes multiple identification informations correspondingly；Institute
Aggregation node, which is stated, to the specific steps that the child node sends the first optical signal includes:
Obtain the identification information of target child node；
It include the first optical signal of the identification information of the target child node to multiple child node transmittings.
Preferably, the identification information of the child node is stored in each child node；The child node receives described the
The specific steps that underwater multi-media signal is acquired after one optical signal include:
Judge identification information included in first optical signal whether the identification information with the child node storage inside
Matching establishes data connection with the aggregation node with confirmation if so, transmitting third optical signal to the aggregation node.
Preferably, first optical signal and second optical signal are blue light signals.
Preferably, the topology network architecture is star topology network structure, and the aggregation node is the star topology
The center of network structure.
Underwater visible light communication device provided by the invention and underwater visible light communication method, using an aggregation node with
Multiple child nodes constitute topology network architecture, using wireless sensor network technology, pass transport control protocol using visible light Sensor Network
View relies on bidirectional optical link, it can be achieved that the transmission of the multi-media signals such as video, audio between multinode under water, realizes
The underwater high-speed transfer of multi-media signal, and improve the reliability of underwater visible light communication.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of a underwater visible light communication device in the specific embodiment of the invention；
Attached drawing 2 is the structural schematic diagram of another underwater visible light communication device in the specific embodiment of the invention；
Attached drawing 3 is the structural schematic diagram of aggregation node in the specific embodiment of the invention；
Attached drawing 4 is the structural schematic diagram of specific embodiment of the invention child nodes；
Attached drawing 5 is the flow chart of underwater visible light communication method in the specific embodiment of the invention.
Specific embodiment
With reference to the accompanying drawing to the tool of underwater visible light communication device provided by the invention and underwater visible light communication method
Body embodiment elaborates.
Present embodiment provides a kind of underwater visible light communication device, and attached drawing 1 is the specific embodiment of the invention
In a underwater visible light communication device structural schematic diagram, attached drawing 3 is the structure of aggregation node in the specific embodiment of the invention
Schematic diagram, attached drawing 4 are the structural schematic diagrams of specific embodiment of the invention child nodes.Shown in as shown in Figure 1, Figure 3 and Figure 4, this tool
The underwater visible light communication device that body embodiment provides, including topology network architecture, the topology network architecture include a remittance
Poly- node 10 and multiple child nodes 11, in which:
The aggregation node 10 includes the first transceiver module 30, and first transceiver module 30 is used for the child node 11
It transmits the first optical signal and receives the second optical signal that the child node 11 is fed back；
The child node 11 includes signal acquisition module 43 and the second transceiver module 40, and the signal acquisition module 43 is used for
Acquire underwater multi-media signal；Second transceiver module 40 connects the signal acquisition module 43, is used for more matchmakers
Body signal is transmitted to the aggregation node 10 after being converted to second optical signal.
In this embodiment, the node centered on the aggregation node 10, the child node 11 is used as can
The peripheral node that optic communication is connect is established with the central node.The aggregation node 10 can pass through first transceiver module
30 send the first optical signal, establish and communicate to connect with child node 11 described in one or more, to realize to the child node 11
Regulation.The child node 11 can acquire the multi-media signals such as underwater audio, video by the signal acquisition module 43,
And the aggregation node is transmitted to after by second transceiver module 40 multi-media signal being converted to the second optical signal
10, to realize that the information to the aggregation node 10 is fed back.Since present embodiment uses topology network architecture, a side
Face is able to carry out the transmitted in both directions of optical signal, improves submarine optical communication between the aggregation node 10 and the child node 11
Efficiency；On the other hand, the setting of multiple child nodes 11 child node can go wrong later timely wherein
It is substituted, it is ensured that the reliability and stability of the underwater visible light communication device overall operation.
In this embodiment, described as shown in Figure 1, the topology network architecture is star topology network structure
Aggregation node 10 is the center of the star topology network structure.
Attached drawing 2 is the structural schematic diagram of another underwater visible light communication device in the specific embodiment of the invention.At other
In specific embodiment, the topology network architecture is also possible to the mixed topology network being made of star topology and tree topology
Structure.Those skilled in the art can also select other topology network architectures according to actual needs.
The signal acquisition module 43 may include a camera and a lighting unit, the irradiation area of the lighting unit
In the imaging region of the camera, to illuminate the imaging region of the camera, clearly underwater video image is obtained.
Preferably, the aggregation node 10 further include:
First memory module 31, for storing and the one-to-one multiple identification informations of multiple child nodes 11；
First processing module 32 connects first memory module 31 and first transceiver module 30, for modulating
It states the first transceiver module 30 and emits first optical signal, first optical signal includes the mark letter of target child node
Breath.
Preferably, the child node 11 includes:
Second memory module 41, for storing the identification information of the child node 11；
Second processing module 42 connects second memory module 41 and the second transceiver module 40, for judging described the
It is deposited in identification information included in first optical signal that two transceiver modules 40 receive and second memory module 41
Whether the identification information of storage matches, if so, modulation second transceiver module 40 transmits third light to the aggregation node 10
Signal establishes data connection with the aggregation node 10 with confirmation.
Specifically, each child node 11 has corresponding, unique identification information, and the identification information is
For address information of the child node 11 in the topology network architecture.The aggregation node 10 can be simultaneously to multiple described
Child node broadcast packet contains the frame information of target identification information corresponding with target child node.Each child node 11 is receiving
To after the frame information, judge target identification information included in the frame information and itself identification information whether
Match, if so, to the 10 feedback acknowledgment information of aggregation node, to be set up between the aggregation node reliable two-way
Optic communication connection；If the child node 11 judges the identification information of target identification information included in the frame information and itself
It mismatches, then abandons the frame information.Established in present embodiment by feedback acknowledgment mechanism aggregation node 10 with
Optical communication data connection between one specific child node 11, has thereby further ensured that the reliability of underwater visible light communication device
And accuracy.Wherein, it is that the mode of optical signal carries out that the aggregation node 10, which broadcasts frame information and is also, and the child node 11 is fed back
Confirmation message is also to be carried out in a manner of optical signal.
In addition, can also include video in the signal acquisition module 43 when the multi-media signal is vision signal
Processing unit, for handling the collected underwater video signal of the camera.Described in present embodiment
Video processing unit preferably uses the vision signal double drive chip of low-power consumption to constitute.
Preferably, first transceiver module 30 includes the first blue light-emitting diode 101 and the first photodiode
102；
Second transceiver module 40 includes the second blue light-emitting diode 111 and the second photodiode 112.
This is because the aggregation node 10 carries out the biography of optical signal with the child node 11 using water as channel under water
It is defeated.First blue light-emitting diode 101 is used as transmitting light source with second blue light-emitting diode 111, for emitting
Optical signal.First blue light-emitting diode 101 and the light of the second blue light-emitting diode 111 transmitting are that wavelength exists
Blue light within the scope of 450nm~470nm, the attenuation degree of the light of the wave band in water well below its all band light in water
In attenuation degree, so as to be effectively improved the effectiveness and transmission quality of the underwater visible light communication device.
First photodiode 102 and second photodiode 112 employed in present embodiment
As light-detecting device, for receiving optical signal and converting optical signals to electric signal.Using applicable in present embodiment
In undersea detection thick film photodiode as first photodiode 102 and second photodiode 112.
In addition, also having and first blue light-emitting diode 101 matched first in first transceiver module 30
The first control circuits structures such as voltage follower driving circuit, the first DC bias circuit, and with two pole of the first photoelectricity
Matched first high speed voltage comparator of pipe 102.Similar, also have and second blue light in second transceiver module 40
The second control circuits structures such as the matched second voltage follower driving circuit of light emitting diode 111, the second DC bias circuit,
And with matched second high speed voltage comparator of second photodiode 102.
Moreover, present embodiment additionally provides a kind of underwater visible light communication method, and attached drawing 5 is tool of the present invention
The flow chart of underwater visible light communication method, underwater visible light communication side described in present embodiment in body embodiment
Method can be implemented using the underwater visible light communication device as described in Fig. 1-Fig. 4.As Figure 1-Figure 5, present embodiment
The underwater visible light communication method provided, includes the following steps:
A topology network architecture is provided, the topology network architecture includes an aggregation node 10 and multiple child nodes 11；
The aggregation node 10 sends the first optical signal to the child node 11；
The child node 11 acquires underwater multi-media signal after receiving first optical signal, and the multimedia is believed
The aggregation node 10 is transmitted to after number being converted to the second optical signal.
Preferably, it is stored in the aggregation node 10 and believes with the one-to-one multiple marks of multiple child nodes 11
Breath；The aggregation node 10 to the child node 11 send the first optical signal specific steps include:
Obtain the identification information of target child node 11；
It include the first optical signal of the identification information of the target child node to multiple transmittings of child node 11.
Preferably, the identification information of the child node is stored in each child node 11；The child node 11 receives institute
It states and acquires the specific steps of underwater multi-media signal after the first optical signal and include:
Judge whether identification information included in first optical signal is believed with the mark of 11 storage inside of child node
Breath matching is established data with the aggregation node 10 with confirmation and is connected if so, transmitting third optical signal to the aggregation node 10
It connects.
Preferably, first optical signal and second optical signal are blue light signals.
Preferably, the topology network architecture is star topology network structure, and the aggregation node 10 is described star-like opens up
Flutter the center of network structure.
The underwater visible light communication device and underwater visible light communication method that present embodiment provides, are converged using one
Poly- node and multiple child nodes constitute topology network architecture, using wireless sensor network technology, are passed using visible light Sensor Network
Transport control protocol view, rely on bidirectional optical link, it can be achieved that the multi-media signals such as video, audio between underwater multinode biography
It is defeated, the underwater high-speed transfer of multi-media signal is realized, and improve the reliability of underwater visible light communication.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of underwater visible light communication device, which is characterized in that including topology network architecture, the topology network architecture includes
One aggregation node and multiple child nodes, in which:
The aggregation node includes the first transceiver module, and first transceiver module is used to transmit the first light letter to the child node
Number and receive the second optical signal of child node feedback；
The child node includes signal acquisition module and the second transceiver module, and the signal acquisition module is used to acquire underwater more
Media signal；Second transceiver module connects the signal acquisition module, described for being converted to the multi-media signal
The aggregation node is transmitted to after second optical signal.
2. underwater visible light communication device according to claim 1, which is characterized in that the aggregation node further include:
First memory module is used for storage and multiple child nodes multiple identification informations correspondingly；
First processing module connects first memory module and first transceiver module, for modulating first transmitting-receiving
Module emits first optical signal, and first optical signal includes the identification information of target child node.
3. underwater visible light communication device according to claim 2, which is characterized in that the child node includes:
Second memory module, for storing the identification information of the child node；
Second processing module connects second memory module and the second transceiver module, for judging second transceiver module
The identification information stored in identification information included in first optical signal received and second memory module is
No matching, if so, modulation second transceiver module transmits third optical signal to the aggregation node, with confirmation and the remittance
Poly- node establishes data connection.
4. underwater visible light communication device according to claim 1, which is characterized in that first transceiver module includes the
One blue light-emitting diode and the first photodiode；
Second transceiver module includes the second blue light-emitting diode and the second photodiode.
5. underwater visible light communication device according to claim 1, which is characterized in that the topology network architecture is star-like
Topology network architecture, the aggregation node are the center of the star topology network structure.
6. a kind of underwater visible light communication method, which comprises the steps of:
A topology network architecture is provided, the topology network architecture includes an aggregation node and multiple child nodes；
The aggregation node sends the first optical signal to the child node；
The child node acquires underwater multi-media signal after receiving first optical signal, and the multi-media signal is converted
To be transmitted to the aggregation node after the second optical signal.
7. underwater visible light communication method according to claim 6, which is characterized in that be stored in the aggregation node with
Multiple child nodes multiple identification informations correspondingly；The aggregation node sends the first optical signal to the child node
Specific steps include:
Obtain the identification information of target child node；
It include the first optical signal of the identification information of the target child node to multiple child node transmittings.
8. underwater visible light communication method according to claim 7, which is characterized in that be stored in each child node
The identification information of the child node；The child node receives the specific step that underwater multi-media signal is acquired after first optical signal
Suddenly include:
Judge identification information included in first optical signal whether the identification information match with the child node storage inside,
If so, transmitting third optical signal to the aggregation node, data connection is established with the aggregation node with confirmation.
9. underwater visible light communication method according to claim 6, which is characterized in that first optical signal and described the
Two optical signals are blue light signals.
10. underwater visible light communication method according to claim 6, which is characterized in that the topology network architecture is star
Type topology network architecture, the aggregation node are the center of the star topology network structure.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147139A (en) * | 2019-12-24 | 2020-05-12 | 广东省半导体产业技术研究院 | Remote control unmanned submersible, underwater visible light communication system and underwater visible light communication automatic alignment method |
| CN111404848A (en) * | 2020-03-20 | 2020-07-10 | 中山大学 | Progressive optimal marine communication system channel estimation method |
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| CN105515680A (en) * | 2016-01-08 | 2016-04-20 | 暨南大学 | Underwater IOT (Internet Of Things) system of VLC (Visible Light Communication) based on blue LEDs (Light Emitting Diodes) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105515680A (en) * | 2016-01-08 | 2016-04-20 | 暨南大学 | Underwater IOT (Internet Of Things) system of VLC (Visible Light Communication) based on blue LEDs (Light Emitting Diodes) |
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| 苟胜难: "物联网技术在水下作业监控及救援中的应用", 《计算机仿真》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147139A (en) * | 2019-12-24 | 2020-05-12 | 广东省半导体产业技术研究院 | Remote control unmanned submersible, underwater visible light communication system and underwater visible light communication automatic alignment method |
| CN111404848A (en) * | 2020-03-20 | 2020-07-10 | 中山大学 | Progressive optimal marine communication system channel estimation method |
| CN111404848B (en) * | 2020-03-20 | 2021-03-19 | 中山大学 | Progressive optimal marine communication system channel estimation method |
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Application publication date: 20190507 |