CN103684531B - In conjunction with the visible light communication system of power line communication and the method for optimization community framework - Google Patents
In conjunction with the visible light communication system of power line communication and the method for optimization community framework Download PDFInfo
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Abstract
The present invention relates to a kind of method of visible light communication system in conjunction with power line communication and optimization community framework, described system comprises the data source connected successively, broadband access and routing device, first electric power modem and visible light communication subsystem, described visible light communication subsystem comprises multiple visible ray access point and terminal, described visible ray access point comprises the second electric power modem module, routing module, downlink code modulation and light emission module, up link detects and demodulation decoding module and LED, each described visible light communication subsystem correspondingly configures the first electric power modem described in.Compared with prior art, the present invention has that strong, the actual use value of extensibility is high, applicability is strong, wide application and transmission performance advantages of higher, is applicable to the transmitting realizing high reliability and high data rate, has wide market-oriented prospect.
Description
Technical field
The present invention relates to technical field of visible light communication, especially relate to the signal of telecommunication that has that a kind of power line communication is combined with visible light communication and regenerate the communication system of link and access the method for community framework based on the optimization visible ray of this communication system.
Background technology
In order to solve how convenient, at low cost transfer of data on " utilizing visible ray to carry out the Novel LED light of data transmit-receive ", power line communication is combined with visible light communication and becomes the research direction in a forward position.But, in existing solution, one class methods utilize the signal of telecommunication transmitted in coupler extraction power circuit to send into LED, then by LED drive unit, voltage signal is converted to current signal, then intensity modulation (such as application number is the Chinese patent of 201210252064.1) is carried out to LED.This method adopts common technology to realize the combination of power line network and LED visible light communication, and both signal unifications, without the need to signal regeneration.But in the method owing to eliminating signal regeneration link, the modulation system of carrying out when data are launched in LED is made to be limited to intensity modulation, and senior digital signal encoding and modulation technique can not be utilized, such as OFDM (OFDM) technology, channel coding technology etc. based on convolution code, go the transmitting realizing high reliability and high data rate.And for considering the another kind of method of signal regeneration link, route when route when existing research then just concentrates on (such as application number is the Chinese patent of 201220097159.6) in the design to the inside structure of " utilizing visible ray to carry out the Novel LED light of data transmit-receive " or do not consider that multiple terminal accesses certain Novel LED light and multiple adjacent subsystems (multiple office of a such as floor or room) access data source.In a word, when adopting these class methods, comprehensively and reasonably designing of the whole system framework from data source (such as internet) to visible ray transceiver terminal is also lacked.
Meanwhile, when designing the visible light communication system in conjunction with power line communication, take into account in the system design scheme of ul transmissions existing, is all almost that hypothesis terminal equipment possesses visible data emissivities in up link.But, in fact, for existing universal personal communications terminal (such as notebook computer, mobile phone, Pad etc.), enter these terminals compared to by visible light communication down link processing capacity module integration, allow in these terminals integrated enter the difficulty of " lamp of the light of some strength can be launched " obviously much bigger.In addition, even consider to go design to have the novel visible transceiver terminal of " lamp that the light of some strength can be launched " specially, the design of the position of lamp in terminal and terminal use may need when carrying out ul transmissions specially the lamp in terminal to be removed the practical operation difficulty of aiming at access point and the bad Consumer's Experience brought, and are all the problems urgently furtheing investigate and go to solve.So when system, we need to go to consider to allow terminal utilize existing wireless communications technology to carry out the possibility of ul transmissions.
During another even more important problem, a lot of research is up to now all carry out relation technological researching for the visible light communication of point-to-point.For the visible light communication system deploying multiple " utilizing visible ray to carry out the Novel LED light of data transmit-receive ", in the existing research few in number carrying out system architecture design, a kind of relatively reasonable design is the system architecture with reference to commercial cellular mobile communication, each Novel LED light is regarded as a community (cell) can accessed by visible ray transceiver terminal, distribute a cell ID (cell ID) then to each Novel LED light.But, at the applied environment (in such as room, in traffic system) of reality, be all that multiple lamp is closely densely deployed in a given region.In such network environment, if a visible ray transceiver terminal is in motion, handover and then cause affecting transmission performance frequently so will be faced.Therefore, need to be optimized design to address this problem to visible ray access community framework.
Summary of the invention
Object of the present invention is exactly provide a kind of visible light communication system with signal of telecommunication regeneration link in conjunction with power line communication to overcome defect that above-mentioned prior art exists, and the method for optimization visible ray access community framework based on this communication system.
Object of the present invention can be achieved through the following technical solutions: a kind of visible light communication system in conjunction with power line communication, it is characterized in that, comprise the data source connected successively, broadband access and routing device, first electric power modem and visible light communication subsystem, described visible light communication subsystem comprises multiple visible ray access point and terminal, described visible ray access point comprises the second electric power modem module, routing module, downlink code modulation and light emission module, up link detects and demodulation decoding module and LED, each described visible light communication subsystem correspondingly configures the first electric power modem described in,
In the downlink, the data that data source (such as internet) is sent into are sent to the first electric power modem by digital signal transmission line road (such as netting twine) by described broadband access and routing device, after digital signal is converted to the signal of telecommunication by the first described electric power modem, each visible ray access point is sent to by power line, routing module is sent to after signal of telecommunication demodulation is regenerated as digital signal by the second described electric power modem module, described routing module by the digital signal of regeneration for one or more access terminal carry out routing configuration after send into downlink code modulation and light emission module, warp after encoding digital signals modulation is carried out VISIBLE LIGHT EMISSION by Novel LED light by described downlink code modulation and light emission module,
In the uplink, for the visible ray access point described in any one, described uplink demodulation decoding module sends into routing module after the digital signal of being sent by one or more terminal received is carried out demodulation coding, described routing module by the digital signal of reception for one or more access terminal carry out routing configuration after send into the second electric power modem module, digital signal modulated is that the signal of telecommunication sends into the first electric power modem by the second described electric power modem module, broadband access and routing device is sent to after the first described electric power modem converts electrical signals to digital signal, described broadband access and routing device by data feedback to data source.
Described downlink code modulation and light emission module comprise downlink coding modulator, descending digital to analog converter, first downlink power amplifier and LED lamp drive circuit and chip, described downlink code modulation and light emission module will belong to the control signal data of one or more digital signal accessed terminal for different terminals interpolation appropriate design (such as accessing the distribution of sub-band resource), then send into described downlink coding modulator and carry out corresponding coded modulation (being modulated to OFDM symbol again after such as convolutional encoding), again by sending into the first downlink power amplifier after described descending digital to analog converter process, VISIBLE LIGHT EMISSION is carried out finally by by LED lamp drive circuit and chip drives LED.
Described up link detects and demodulation decoding module comprises upstream data detector, first ascending power amplifier, up low pass filter, up analog to digital converter, uplink demodulation decoder, after the data transmitted by one or more terminal wireless are first processed by described upstream data detector, the up analog to digital converter described in rear feeding is processed successively by the first described ascending power amplifier and up low pass filter, uplink demodulation decoder described in again the digital signal exported being sent into carries out corresponding solution mediation decoding, routing module described in finally the digital signal obtained being sent into does further ul transmissions process.
Described upstream data detector comprises upstream data visible light detector and upstream data electromagnetic wave detector, or only includes one of them according to the up emissivities of terminal.Such as, if visible ray transceiver terminal only possesses based on electromagnetic conventional wireless data emissivities, then visible ray access point up link detect and demodulation decoding module just can only possess upstream data electromagnetic wave detector.
Described upstream data visible light detector comprises the up optical filter connected successively, up lens and up photodetector, and described up photodetector is photodiode.
Described upstream data electromagnetic wave detector comprises the uplink receiving antenna and uplink receiving process radio-frequency devices that connect successively.
Described terminal comprises down link processing module and uplink processing module;
For the terminal described in any one, described down link processing module comprises the descending optical filter connected successively, descending lens, descending photodetector (such as photodiode), the second downlink power amplifier, descending low pass filter, descending analog to digital converter and downstream modulation decoder, and described down link processing module receives " making the data of carrier with the visible ray " row relax of going forward side by side launched by corresponding visible ray access point;
Described uplink processing module comprises up coding demodulator, up digital to analog converter, the second ascending power amplifier and upstream data reflector, described uplink processing module is sent into described up coding demodulator, up digital to analog converter and the second ascending power amplifier successively after adding control signal data to initial data and is processed, and launches afterwards via upstream data reflector.
Described upstream data reflector comprises upstream data visible light emitter and upstream data electromagnetic wave transmitter, or only includes one of them.
Described upstream data visible light emitter is the up LED that sent visible ray can be utilized to carry out transfer of data, and this LED comprises drive circuit, chip and luminescent device.
Described upstream data electromagnetic wave transmitter comprises up transmitting process radio-frequency devices and up transmitting antenna.
Based on a method for the optimization community framework of the visible light communication system in conjunction with power line communication, it is characterized in that:
(1) for the given area that in visible light communication subsystem, is deployed with multiple visible ray access point, the visible ray access point having most high luminous intensity and the light that sends in this given area and can cover whole given area is defined as macrocell node, by with the adjacent deployment of this macrocell node, the visible ray coverage that sends is that any one visible ray access point of the visible ray coverage subset that this macrocell node sends is defined as and is with auxiliary cell Node by one of this macrocell node institute master control;
Described each macrocell node has independently cell ID, described each band auxiliary cell Node does not have independently cell ID, described each band auxiliary cell Node is " transparent " for terminal, in other words, terminal not can be appreciated that the existence of band auxiliary cell Node.
A described band auxiliary cell Node launch of data channels data in the downlink, not emission control signaling data (the control signal data such as allowing terminal carry out community discovery); Be in certain visible ray coverage being with auxiliary cell Node to send, also be in any one terminal in visible ray coverage that macrocell node sends simultaneously, receive the control signal data of being launched by macrocell node and the data channel signal of being launched by band auxiliary cell Node.
When motion state, when the visible ray coverage only sent from a macrocell node is moved into the visible ray coverage that another macrocell node sends, just can there is handover in described terminal.
(2) in the downlink, based on the method for described optimization visible ray access community framework, function and the interface relationship of the described visible light communication system in conjunction with power line communication need to make corresponding renewal, in downlink transmission processing procedure, described renewal is specific as follows
After the digital signal that described broadband access and routing device transmit is converted to the signal of telecommunication by the first described electric power modem, send to each macrocell node in corresponding visible light communication subsystem; Signal of telecommunication demodulation is regenerated as digital signal by the second electric power modem module of each described macrocell node, then will determine the routing module being sent into oneself by the digital signal of oneself carrying out downlink transmission in digital signal, the digital signal of the band auxiliary cell Node determining to be distributed to institute's master control being carried out downlink transmission is converted to the signal of telecommunication and is with auxiliary cell Node by power line transmission to corresponding; The signal of telecommunication demodulation of being come by power line transmission via affiliated macrocell node is regenerated as digital signal by the second electric power modem module of described each band auxiliary cell Node, then sends into the routing module of oneself.
(3) in the uplink, based on the method for described optimization visible ray access community framework, function and the interface relationship of the described visible light communication system in conjunction with power line communication need to make corresponding renewal, in uplink data transmission processing procedure, described renewal is specific as follows
The digital signal modulated that routing module via oneself is sent here by the second electric power modem module of described each band auxiliary cell Node is the signal of telecommunication, the macrocell node belonging to then being sent into by power line;
For the second electric power modem module of described macrocell node, the renewal of its function and interface relationship comprises following three kinds of situations:
The electrical uplink signals of i) if there is no being come via power line transmission by band auxiliary cell Node, the digital signal modulated that routing module via oneself is sent here by the second electric power modem module of described macrocell node is the signal of telecommunication, and sends into the first electric power modem by power line;
Ii) if there is the electrical uplink signals of being come via power line transmission by band auxiliary cell Node, and there is not the digital signal sent here by the routing module of described macrocell node oneself, then the second electric power modem module of described macrocell node directly sends into the first electric power modem by power line by the electrical uplink signals transmitted by band auxiliary cell Node;
Iii) if there is the electrical uplink signals of being come via power line transmission by band auxiliary cell Node, and there is the digital signal sent here by the routing module of described macrocell node oneself simultaneously, then the second electric power modem module of described macrocell node will first be carried out the electrical uplink signals transmitted by band auxiliary cell Node demodulation and be regenerated as digital signal, be modulated to the signal of telecommunication after again two parts digital signal being carried out merging and respective handling, send into the first electric power modem finally by power line;
The signal of telecommunication that macrocell node-node transmission each in corresponding visible light communication subsystem is come is converted to digital signal by the first described electric power modem, then sends to described broadband access and routing device by digital signal transmission line road.
Compared with prior art, the present invention has the following advantages:
1, the present invention is regenerated as digital signal after being modulated by the signal of telecommunication, can adjust coding modulation technique according to actual needs, be applicable to the transmitting realizing high reliability and high data rate.
2, the present invention's design covers route processing when multiple visible light communication subsystem and multiple VISIBLE LIGHT EMISSION terminal exist, and extensibility is strong, and actual use value is high.
3, the present invention is directed to the terminal only with VISIBLE LIGHT EMISSION ability, the terminal only with electromagnetic radiation ability and there is the terminal of visible ray and electromagnetic radiation ability simultaneously, the transmission process of up link can be realized, applicability is strong, wide application.
4, visible ray transceiver terminal of the present invention is when motion state, when the visible ray coverage only sent from a macrocell node is moved into the visible ray coverage that another macrocell node sends, just handover can be there is, efficiently solve visible ray transceiver terminal access community in prior art and produce the problem of frequent handovers, improve the transmission performance of whole communication system, there is wide market-oriented prospect.
Accompanying drawing explanation
Fig. 1 is the configuration diagram that communication system of the present invention is given.
In figure, M represents optical fiber or netting twine or telephone wire; W represents netting twine; E represents power line.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, a kind of visible light communication system in conjunction with power line communication, it is characterized in that, comprise the data source 1 connected successively, broadband access and routing device 2, first electric power modem 3 and visible light communication subsystem 4, described visible light communication subsystem 4 comprises multiple visible ray access point and terminal 5, described visible ray access point comprises the second electric power modem module 41, routing module 42, downlink code modulation and light emission module 43, up link detects and demodulation decoding module 44 and LED, each described visible light communication subsystem 4 correspondingly configures the first electric power modem 3 described in,
Described downlink code modulation and light emission module 43 comprise downlink coding modulator, descending digital to analog converter, first downlink power amplifier and LED lamp drive circuit and chip, described downlink code modulation and light emission module by belong to one or more access terminal 5 digital signal for the control signal data of different terminals interpolation appropriate design, then send into described downlink coding modulator and carry out corresponding coded modulation, again by sending into the first downlink power amplifier after described descending digital to analog converter process, VISIBLE LIGHT EMISSION is carried out finally by by LED lamp drive circuit and chip drives LED.
Described up link detects and demodulation decoding module 44 comprises upstream data detector, first ascending power amplifier, up low pass filter, up analog to digital converter, uplink demodulation decoder, after the data of being come by one or more terminal 5 wireless transmission are first processed by described upstream data detector, the up analog to digital converter described in rear feeding is processed successively by the first described ascending power amplifier and up low pass filter, uplink demodulation decoder described in again the digital signal exported being sent into carries out corresponding solution mediation decoding, routing module described in finally the digital signal obtained being sent into does further ul transmissions process.
Described upstream data detector comprises upstream data visible light detector and upstream data electromagnetic wave detector, or only includes one of them according to the up emissivities of terminal 5.Such as, if terminal 5 only possesses based on electromagnetic conventional wireless data emissivities, then visible ray access point up link detect and demodulation decoding module just can only possess upstream data electromagnetic wave detector.Described upstream data visible light detector comprises the up optical filter connected successively, up lens and up photodetector, and described up photodetector is photodiode.Described upstream data electromagnetic wave detector comprises the uplink receiving antenna and uplink receiving process radio-frequency devices that connect successively.
Described terminal 5 comprises down link processing module and uplink processing module; For the terminal 5 described in any one, described down link processing module comprises the descending optical filter connected successively, descending lens, descending photodetector (such as photodiode), the second downlink power amplifier, descending low pass filter, descending analog to digital converter and downstream modulation decoder, and described down link processing module receives " making the data of carrier with the visible ray " row relax of going forward side by side launched by corresponding visible ray access point; Described uplink processing module comprises up coding demodulator, up digital to analog converter, the second ascending power amplifier and upstream data reflector, described uplink processing module is sent into described up coding demodulator, up digital to analog converter and the second ascending power amplifier successively after adding control signal data to initial data and is processed, and launches afterwards via upstream data reflector.
Described upstream data reflector comprises upstream data visible light emitter and upstream data electromagnetic wave transmitter, or only includes one of them.Described upstream data visible light emitter is the up LED that sent visible ray can be utilized to carry out transfer of data, and this LED comprises drive circuit, chip and luminescent device.Described upstream data electromagnetic wave transmitter comprises up transmitting process radio-frequency devices and up transmitting antenna.
Based on a method for the optimization visible ray access community framework of the visible light communication system in conjunction with power line communication, it is characterized in that,
(1) for the given area being deployed with multiple visible ray access point in visible light communication subsystem 4, the visible ray access point having most high luminous intensity and the light that sends in this given area and can cover whole given area is defined as macrocell node AP1, by with the adjacent deployment of this macrocell node, the visible ray coverage that sends is that any one visible ray access point of the visible ray coverage subset that this macrocell node sends is defined as and is with auxiliary cell Node AP2 by one of this macrocell node institute master control;
Described each macrocell node AP1 has independently cell ID, and described each band auxiliary cell Node AP2 does not have independently cell ID.Described each band auxiliary cell Node AP2 is " transparent " for terminal 5, and in other words, terminal 5 not can be appreciated that the existence of band auxiliary cell Node AP2.
A described band auxiliary cell Node AP2 launch of data channels data in the downlink, not emission control signaling data; Be in certain visible ray coverage being with auxiliary cell Node AP2 to send, also be in any one terminal 5 in visible ray coverage that macrocell node AP1 sends simultaneously, receive the control signal data of being launched by macrocell node AP1 and the data channel signal of being launched by band auxiliary cell Node AP2.
When motion state, when the visible ray coverage only sent from a macrocell node AP1 is moved into the visible ray coverage that another macrocell node AP1 sends, just can there is handover in described terminal 5.
(2) in the downlink, based on the method for the optimization visible ray access community framework described in employing, function in conjunction with the certain module in the visible light communication system of power line communication of the present invention has corresponding renewal to interface relationship, now these transfer of data flow processs upgraded in conjunction with whole down link is described below:
Described data source 1 transfers data to broadband access and routing device 2 by optical fiber or netting twine or telephone wire M, the digital signal that data source 1 sends is sent into the first electric power modem 4 by netting twine W by described broadband access and routing device 2, after digital signal is converted to the signal of telecommunication by the first described electric power modem 4, send to each macrocell node AP1 in corresponding visible light communication subsystem 3, signal of telecommunication demodulation is regenerated as digital signal by the second electric power modem module of each described macrocell node AP1, then the routing module being sent into oneself by the digital signal of oneself carrying out downlink transmission will be determined in digital signal, the digital signal that the band auxiliary cell Node AP2 determining to be distributed to institute's master control carries out downlink transmission is converted to the signal of telecommunication, and be transferred to corresponding band auxiliary cell Node AP2 by power line E, after the signal of telecommunication demodulation of reception is regenerated as digital signal by the second electric power modem module of described each band auxiliary cell Node AP2, send into the routing module of oneself, the routing module of described macrocell node AP1 and the routing module of described band auxiliary cell Node AP2 respectively by the digital signal of regeneration for one or more access terminal 5 carry out routing configuration after, send into respective downlink code modulation and light emission module, warp after encoding digital signals modulation is carried out VISIBLE LIGHT EMISSION by Novel LED light by described downlink code modulation and light emission module.
(3) in the uplink, based on the method for the optimization visible ray access community framework described in employing, function in conjunction with the certain module in the visible light communication system of power line communication of the present invention has corresponding renewal to interface relationship, now these transfer of data flow processs upgraded in conjunction with whole up link is described below:
Routing module is sent into after the received digital signal sent by one or more terminal 5 is carried out demodulation coding by the up link detection of any one visible ray access cell Node and demodulation decoding module;
Digital signal after having carried out routing configuration is sent into the second electric power modem module of this band auxiliary cell Node AP2 by the routing module of described each band auxiliary cell Node AP2, described second electric power modem module by digital signal modulated for sending into the macrocell node AP1 belonging to this band auxiliary cell Node AP2 by power line E after the signal of telecommunication;
Digital signal after having carried out routing configuration is sent into the second electric power modem module of this macrocell node AP1 by the routing module of described macrocell node AP1, and the subsequent treatment of described second electric power modem module comprises following three kinds of situations:
31) electrical uplink signals if there is no transmitted via power line E by band auxiliary cell Node AP2, the digital signal modulated that routing module via oneself is sent here is then the signal of telecommunication by the second electric power modem module of this macrocell node AP1, and sends into corresponding first electric power modem 4 by power line E;
32) if there is the electrical uplink signals transmitted via power line E by band auxiliary cell Node AP2, and there is not the digital signal sent here by the routing module of this macrocell node AP1 oneself, then the second electric power modem module of this macrocell node AP1 just directly sends into corresponding first electric power modem 4 by power line E the electrical uplink signals transmitted by band auxiliary cell Node AP2;
33) if there is the electrical uplink signals transmitted via power line E by band auxiliary cell Node AP2, and there is the digital signal sent here by the routing module of this macrocell node AP1 oneself simultaneously, then the second electric power modem module of this macrocell node AP1 first will be regenerated as digital signal the electrical uplink signals demodulation transmitted by band auxiliary cell Node AP2, be modulated to the signal of telecommunication after again two parts digital signal being carried out merging and respective handling, send into corresponding first electric power modem 4 finally by power line E;
The signal of telecommunication that each macrocell node AP1 in corresponding visible light communication subsystem 4 transmits is converted to digital signal by the first described electric power modem 3, then send to broadband access and routing device 2 by netting twine W, described broadband access and routing device 2 pass through optical fiber or netting twine or telephone wire M by data feedback to data source 1.
Claims (10)
1. the method based on the optimization community framework of the visible light communication system in conjunction with power line communication, it is characterized in that, described visible light communication system comprises the data source connected successively, broadband access and routing device, first electric power modem and visible light communication subsystem, described visible light communication subsystem comprises multiple visible ray access point and terminal, described visible ray access point comprises the second electric power modem module, routing module, downlink code modulation and light emission module, up link detects and demodulation decoding module and LED, each described visible light communication subsystem correspondingly configures the first electric power modem described in,
In the downlink, the data that data source is sent into are sent to the first electric power modem by digital signal transmission line road by described broadband access and routing device, after digital signal is converted to the signal of telecommunication by the first described electric power modem, each visible ray access point is sent to by power line, routing module is sent to after signal of telecommunication demodulation is regenerated as digital signal by the second described electric power modem module, described routing module sends into downlink code modulation and light emission module after the digital signal of regeneration is carried out routing configuration for one or more terminal, warp after encoding digital signals modulation is carried out VISIBLE LIGHT EMISSION by Novel LED light by described downlink code modulation and light emission module,
In the uplink, routing module is sent into after the digital signal of being sent by one or more terminal received is carried out demodulation coding by described up link detection and demodulation decoding module, described routing module sends into the second electric power modem module after the digital signal of reception is carried out routing configuration for one or more terminal, digital signal modulated is that the signal of telecommunication sends into the first electric power modem by the second described electric power modem module, broadband access and routing device is sent to after the first described electric power modem converts electrical signals to digital signal, described broadband access and routing device by data feedback to data source,
For the given area that in visible light communication subsystem, is deployed with multiple visible ray access point, the visible ray access point having most high luminous intensity and the light that sends in this given area and can cover whole given area is defined as macrocell node, by with the adjacent deployment of this macrocell node, the visible ray coverage that sends is that any one visible ray access point of the visible ray coverage subset that this macrocell node sends is defined as and is with auxiliary cell Node by one of this macrocell node institute master control;
Each macrocell node has independently cell ID, each band auxiliary cell Node does not have independently cell ID, each band auxiliary cell Node is " transparent " for terminal, and in other words, terminal not can be appreciated that the existence of band auxiliary cell Node.
2. the method for a kind of optimization community framework based on the visible light communication system in conjunction with power line communication according to claim 1, it is characterized in that, described downlink code modulation and light emission module comprise downlink coding modulator, descending digital to analog converter, first downlink power amplifier and LED lamp drive circuit and chip, described downlink code modulation and light emission module will belong to the control signal data of digital signal for different terminals interpolation appropriate design of one or more terminal, then send into described downlink coding modulator and carry out corresponding coded modulation, again by sending into the first downlink power amplifier after described descending digital to analog converter process, VISIBLE LIGHT EMISSION is carried out finally by by LED lamp drive circuit and chip drives LED.
3. the method for a kind of optimization community framework based on the visible light communication system in conjunction with power line communication according to claim 1, it is characterized in that, described up link detects and demodulation decoding module comprises upstream data detector, first ascending power amplifier, up low pass filter, up analog to digital converter, uplink demodulation decoder, after the data transmitted by one or more terminal wireless are first processed by described upstream data detector, the up analog to digital converter described in rear feeding is processed successively by the first described ascending power amplifier and up low pass filter, uplink demodulation decoder described in again the digital signal exported being sent into carries out corresponding solution mediation decoding, routing module described in finally the digital signal obtained being sent into does further ul transmissions process.
4. the method for a kind of optimization community framework based on the visible light communication system in conjunction with power line communication according to claim 3, it is characterized in that, described upstream data detector comprises upstream data visible light detector and upstream data electromagnetic wave detector, or only includes one of them according to the up emissivities of terminal.
5. the method for a kind of optimization community framework based on the visible light communication system in conjunction with power line communication according to claim 1, it is characterized in that, described terminal comprises down link processing module and uplink processing module;
Described down link processing module comprises the descending optical filter connected successively, descending lens, descending photodetector, the second downlink power amplifier, descending low pass filter, descending analog to digital converter and downstream modulation decoder, and described down link processing module receives " making the data of carrier with the visible ray " row relax of going forward side by side launched by corresponding visible ray access point;
Described uplink processing module comprises up coding demodulator, up digital to analog converter, the second ascending power amplifier and upstream data reflector, described uplink processing module is sent into described up coding demodulator, up digital to analog converter and the second ascending power amplifier successively after adding control signal data to initial data and is processed, and launches afterwards via upstream data reflector.
6. the method for a kind of optimization community framework based on the visible light communication system in conjunction with power line communication according to claim 5, it is characterized in that, described upstream data reflector comprises upstream data visible light emitter and upstream data electromagnetic wave transmitter, or only includes one of them.
7. the method for a kind of optimization community framework based on the visible light communication system in conjunction with power line communication according to claim 1, it is characterized in that, a described band auxiliary cell Node launch of data channels data in the downlink, not emission control signaling data; Be in certain visible ray coverage being with auxiliary cell Node to send, also be in any one terminal in visible ray coverage that macrocell node sends simultaneously, receive the control signal data of being launched by macrocell node and the data channel signal of being launched by band auxiliary cell Node.
8. the method for a kind of optimization community framework based on the visible light communication system in conjunction with power line communication according to claim 1, it is characterized in that, described terminal is when motion state, when the visible ray coverage only sent from a macrocell node is moved into the visible ray coverage that another macrocell node sends, just handover can be there is.
9. the method for a kind of optimization community framework based on the visible light communication system in conjunction with power line communication according to claim 1, it is characterized in that, the function of the described visible light communication system in conjunction with power line communication makes corresponding renewal to interface relationship, in downlink transmission processing procedure, described renewal is specific as follows
After the digital signal that described broadband access and routing device transmit is converted to the signal of telecommunication by the first described electric power modem, send to each macrocell node in corresponding visible light communication subsystem; Signal of telecommunication demodulation is regenerated as digital signal by the second electric power modem module of each described macrocell node, then will determine the routing module being sent into oneself by the digital signal of oneself carrying out downlink transmission in digital signal, the digital signal of the band auxiliary cell Node determining to be distributed to institute's master control being carried out downlink transmission is converted to the signal of telecommunication and is with auxiliary cell Node by power line transmission to corresponding; The signal of telecommunication demodulation of being come by power line transmission via affiliated macrocell node is regenerated as digital signal by the second electric power modem module of each band auxiliary cell Node, then sends into the routing module of oneself.
10. the method for a kind of optimization community framework based on the visible light communication system in conjunction with power line communication according to claim 1, it is characterized in that, the function of the described visible light communication system in conjunction with power line communication makes corresponding renewal to interface relationship, in uplink data transmission processing procedure, described renewal is specific as follows
The digital signal modulated that routing module via oneself is sent here by the second electric power modem module of each band auxiliary cell Node is the signal of telecommunication, the macrocell node belonging to then being sent into by power line;
For the second electric power modem module of described macrocell node, the renewal of its function and interface relationship comprises following three kinds of situations:
The electrical uplink signals of i) if there is no being come via power line transmission by band auxiliary cell Node, the digital signal modulated that routing module via oneself is sent here by the second electric power modem module of described macrocell node is the signal of telecommunication, and sends into the first electric power modem by power line;
Ii) if there is the electrical uplink signals of being come via power line transmission by band auxiliary cell Node, and there is not the digital signal sent here by the routing module of described macrocell node oneself, then the second electric power modem module of described macrocell node directly sends into the first electric power modem by power line by the electrical uplink signals transmitted by band auxiliary cell Node;
Iii) if there is the electrical uplink signals of being come via power line transmission by band auxiliary cell Node, and there is the digital signal sent here by the routing module of described macrocell node oneself simultaneously, then the second electric power modem module of described macrocell node will first be carried out the electrical uplink signals transmitted by band auxiliary cell Node demodulation and be regenerated as digital signal, be modulated to the signal of telecommunication after again two parts digital signal being carried out merging and respective handling, send into the first electric power modem finally by power line;
The signal of telecommunication that macrocell node-node transmission each in corresponding visible light communication subsystem is come is converted to digital signal by the first described electric power modem, then sends to described broadband access and routing device by digital signal transmission line road.
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| CN105162519A (en) * | 2015-09-29 | 2015-12-16 | 北京邮电大学 | Kalman filtering based positioning and handover method in indoor microcellular visible light communication network |
| CN105812057B (en) * | 2016-04-29 | 2018-07-27 | 东北电力大学 | A kind of indoor visible light communication relay forwarding device |
| CN106941374B (en) * | 2016-12-23 | 2019-05-31 | 中国人民解放军信息工程大学 | A kind of switching system and method for visible light communication and power line communication |
| CN111147140A (en) * | 2020-02-01 | 2020-05-12 | 东莞智联光频科技有限公司 | Mobile communication network system based on visible light communication technology |
| CN114499662A (en) * | 2022-02-18 | 2022-05-13 | 中国科学院空间应用工程与技术中心 | Communication device and wireless optical communication and energy transmission positioning integrated system |
| CN115052367A (en) * | 2022-06-27 | 2022-09-13 | 中国人民解放军战略支援部队信息工程大学 | Carrier sensing method and related equipment |
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