CN106253982B - Optical communication method and equipment - Google Patents

Optical communication method and equipment Download PDF

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Publication number
CN106253982B
CN106253982B CN201610616826.XA CN201610616826A CN106253982B CN 106253982 B CN106253982 B CN 106253982B CN 201610616826 A CN201610616826 A CN 201610616826A CN 106253982 B CN106253982 B CN 106253982B
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China
Prior art keywords
transmitting apparatus
signal
optica
mobile terminal
receivingl transmitting
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CN201610616826.XA
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CN106253982A (en
Inventor
王昌元
黄生叶
张娅琳
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Guangzhou Wisdom Communication Technology Co Ltd
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Guangzhou Wisdom Communication Technology Co Ltd
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Priority to CN201610616826.XA priority Critical patent/CN106253982B/en
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    • 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
    • H04B10/116—Visible light communication
    • 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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal

Abstract

The present invention relates to a kind of optical communication method and equipment, the parameter value of optical test signal is first passed through to choose the optica signal receivingl transmitting apparatus group associated with mobile terminal, communicated using the optica signal receivingl transmitting apparatus group of selection with mobile terminal, because position changes after mobile terminal movement, the parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received can also change, the optica signal receivingl transmitting apparatus group that can be associated using the parameter value of optical test signal with choice of dynamical with mobile terminal, it has been well adapted for the mobility of mobile terminal, ensure proper communication, and simultaneously the optica signal receivingl transmitting apparatus of not all produces optic communication power simultaneously, each optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group only chosen produces optic communication power, luminous energy is saved, improve the utilization ratio of light.

Description

Optical communication method and equipment
Technical field
The present invention relates to technical field of photo communication, more particularly to a kind of optical communication method and equipment.
Background technology
Popularization and in short supply, the scientific research personnel of Radio Spectrum Resource with high brightness LED (LED) illuminating lamp While starting to consider to be used to illuminate by LED lamplight, also for transmitting information, visible light communication technology is then occurred in that.Compare Radio communication technology, it is seen that optical communication technique has many advantages：1st, permit without frequency spectrum；2nd, not producing may be harmful Electromagnetic radiation；3rd, based on line-of-sight propagation approach, communicate safer etc..
But optic communication at present, there is also some shortcomings, support such as ambulant to mobile terminal is not strong, it is necessary to a large amount of Communication light source just can guarantee that proper communication with mobile terminal, cause the utilization rate of light not enough.
The content of the invention
Based on this, it is necessary to do not cause the utilization to light by force for existing optic communication support ambulant to mobile terminal There is provided a kind of optical communication method and equipment for the problem of rate is not enough.
A kind of optical communication method, comprises the following steps：
The parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received is obtained, wherein, optical test signal is by moving What dynamic terminal was sent；
The optica signal receivingl transmitting apparatus group for determining to associate with mobile terminal according to the parameter value of each optical test signal；
Communicated by optica signal receivingl transmitting apparatus group with mobile terminal.
A kind of optical communication equipment, it is characterised in that including following device：
Optica signal receivingl transmitting apparatus, for receiving optical test signal, wherein, the optical test signal is sent by mobile terminal 's；
Optic communication primary processor, the parameter value for obtaining the optical test signal that each optica signal receivingl transmitting apparatus is received, root The optica signal receivingl transmitting apparatus group for determining to associate with the mobile terminal according to the parameter value of each optical test signal, passes through the optical signal R-T unit group is communicated with the mobile terminal.
According to the optical communication method and equipment of the invention described above, it is to receive mobile terminal by each optica signal receivingl transmitting apparatus The optical test signal of transmission；The optica signal receivingl transmitting apparatus for determining to associate with mobile terminal according to the parameter value of each optical test signal Group；Communicated by optica signal receivingl transmitting apparatus group with mobile terminal.In the present invention, the parameter value of optical test signal is first passed through To choose the optica signal receivingl transmitting apparatus group associated with mobile terminal, entered using optica signal receivingl transmitting apparatus group and the mobile terminal of selection Row communication, because position changes after mobile terminal movement, the parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received Also it can change, the optica signal receivingl transmitting apparatus group that can be associated using the parameter value of optical test signal with choice of dynamical with mobile terminal, It has been well adapted for the mobility of mobile terminal, it is ensured that proper communication, and simultaneously the optica signal receivingl transmitting apparatus of not all is produced simultaneously Each optica signal receivingl transmitting apparatus in third contact of a total solar or lunar eclipse power of communications, the optica signal receivingl transmitting apparatus group only chosen produces optic communication power, section About luminous energy, improves the utilization ratio of light.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the optical communication method of one of embodiment；
Fig. 2 is the structural representation of the optical communication equipment of one of embodiment；
Fig. 3 is the application structure schematic diagram of the optical communication equipment of one of specific embodiment；
Fig. 4 is the LED of one of specific embodiment and the packet communication schematic diagram of mobile terminal；
Fig. 5 associates schematic flow sheet for LED and the mobile terminal of one of specific embodiment.
Embodiment
For the objects, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with drawings and Examples, to this Invention is described in further detail.It should be appreciated that embodiment described herein is only to explain the present invention, Do not limit protection scope of the present invention.
It is shown in Figure 1, it is the schematic flow sheet of optical communication method in one embodiment of the invention.Light in the embodiment Communication means, comprises the following steps：
Step S101：The parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received is obtained, wherein, optical tests letter Number sent by mobile terminal；
Step S102：The optica signal receivingl transmitting apparatus for determining to associate with mobile terminal according to the parameter value of each optical test signal Group；
In this step, optica signal receivingl transmitting apparatus group includes more than one optica signal receivingl transmitting apparatus；
Step S103：Communicated by optica signal receivingl transmitting apparatus group with mobile terminal；
Specifically, optica signal receivingl transmitting apparatus can receive or send optic communication signal, mobile terminal includes smart mobile phone (Smart Phone), tablet personal computer, notebook computer, personal digital assistant etc., mobile terminal include photosensitive device and luminous dress Put, mobile terminal can receive optic communication signal by photosensitive device, mobile terminal can send optic communication by light-emitting device Signal.
In the present embodiment, the parameter value of optical test signal is first passed through to choose the optical signal transceiver associated with mobile terminal Device group, is communicated using the optica signal receivingl transmitting apparatus group of selection with mobile terminal, because position changes after mobile terminal movement Become, the parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received can also change, and utilize the parameter value of optical test signal The optica signal receivingl transmitting apparatus group that can be associated with choice of dynamical with mobile terminal, has been well adapted for the mobility of mobile terminal, protects Proper communication is demonstrate,proved, and simultaneously the optica signal receivingl transmitting apparatus of not all produces optic communication power simultaneously, and the optical signal only chosen is received Each optica signal receivingl transmitting apparatus in transmitting apparatus group produces optic communication power, has saved luminous energy, has improved the utilization ratio of light.
It is preferred that, optica signal receivingl transmitting apparatus is connected with optic communication primary processor, and optic communication primary processor obtains each optical signal The parameter value for the optical test signal that R-T unit is received, and associated according to the acquisition of the parameter value of each optical test signal with mobile terminal Optica signal receivingl transmitting apparatus group；The optic communication that optic communication primary processor obtains mobile terminal by optica signal receivingl transmitting apparatus group is believed Number, it would be desirable to the optic communication signal for feeding back to mobile terminal is sent to mobile terminal by optica signal receivingl transmitting apparatus group.
In addition, the parameter value of optical test signal not only includes performance parameter value optical test signal in itself, in addition to each light Signal receiving/transmission device receives various parameters value during optical test signal.
In one of the embodiments, the parameter value of each optical test signal is the intensity level of each optical test signal, according to each The step of parameter value of optical test signal determines the optica signal receivingl transmitting apparatus group associated with mobile terminal comprises the following steps：
It is respectively compared the intensity level of each optical test signal and the size of preset strength threshold value；
The optica signal receivingl transmitting apparatus that optical test signal intensity level is more than preset strength threshold value is chosen, the light of each selection is believed The set of number R-T unit is used as optica signal receivingl transmitting apparatus group.
In the present embodiment, the intensity level of the optical test signal received by relatively more each optica signal receivingl transmitting apparatus is with presetting The size of intensity threshold, it may be determined that with sending the optica signal receivingl transmitting apparatus that the mobile terminal of the optical test signal is associated, thus The optica signal receivingl transmitting apparatus of determination is communicated with mobile terminal, and the signal intensity transmitted between the two can ensure communication just Often carry out.Preset strength threshold value can be adjusted according to the specific requirement of communication, and the specific requirement of communication is being generally satisfaction just Normal open is believed, while the total power consumption of optica signal receivingl transmitting apparatus is minimum.
It is preferred that, the step in the present embodiment is held in the optic communication primary processor being connected with optica signal receivingl transmitting apparatus OK.
In one of the embodiments, the parameter value of each optical test signal is the intensity level of each optical test signal, according to each The step of parameter value of optical test signal determines the optica signal receivingl transmitting apparatus group associated with mobile terminal comprises the following steps：
The distance value of each optica signal receivingl transmitting apparatus and mobile terminal is obtained according to the intensity level of each optical test signal；
Each distance value is arranged from small to large, the distance value of predetermined number is chosen successively since lowest distance value, it is determined that Each optica signal receivingl transmitting apparatus corresponding with the distance value of predetermined number, regard the set of each optica signal receivingl transmitting apparatus of acquisition as light Signal receiving/transmission device group.
In the present embodiment, the intensity level of the optical test signal received according to each optica signal receivingl transmitting apparatus can be calculated and obtained Obtain the distance value of each optica signal receivingl transmitting apparatus and mobile terminal；Choose the corresponding optical signal transceiver of small distance value of predetermined number Device is used as optica signal receivingl transmitting apparatus group.Because optica signal receivingl transmitting apparatus and the distance between mobile terminal are shorter, optical signal is received Signal needed for transmitting apparatus is communicated with mobile terminal sends intensity just smaller, the less optica signal receivingl transmitting apparatus of selected distance Communicated with mobile terminal, the signal intensity transmitted between the two can ensure being normally carried out for communication.Predetermined number can be with It is adjusted according to the specific requirement of communication, the specific requirement of communication, which is generally, meets proper communication, while optical signal transceiver is filled The total power consumption put is minimum.
In one of the embodiments, the parameter value of each optical test signal is the time of reception value of each optical test signal with sending out The difference of moment value is sent, the optica signal receivingl transmitting apparatus group for determining to associate with mobile terminal according to the parameter value of each optical test signal Step comprises the following steps：
According to the time of reception of each optical test signal be worth with the difference of delivery time value obtain each optica signal receivingl transmitting apparatus with The distance value of mobile terminal；
Each distance value is arranged from small to large, the distance value of predetermined number is chosen successively since lowest distance value, obtained Each optica signal receivingl transmitting apparatus corresponding with the distance value of predetermined number, regard the set of each optica signal receivingl transmitting apparatus of acquisition as light Signal receiving/transmission device group.
In the present embodiment, the time of reception value of the optical test signal received according to each optica signal receivingl transmitting apparatus is with sending The difference (i.e. optical test signal transmission time value) of moment value, which can be calculated, obtains each optica signal receivingl transmitting apparatus and mobile terminal Distance value；The corresponding optica signal receivingl transmitting apparatus of small distance value for choosing predetermined number is used as optica signal receivingl transmitting apparatus group.Due to Optica signal receivingl transmitting apparatus and the distance between mobile terminal are shorter, needed for optica signal receivingl transmitting apparatus is communicated with mobile terminal Signal transmission intensity is just smaller, and the less optica signal receivingl transmitting apparatus of selected distance is communicated with mobile terminal, is passed between the two Defeated signal intensity can ensure being normally carried out for communication.Predetermined number can be adjusted according to the specific requirement of communication, be led to The specific requirement of letter, which is generally, meets proper communication, while the total power consumption of optica signal receivingl transmitting apparatus is minimum.
It is preferred that, transmission time information can be included in optical test signal, flash ranging is received according to optica signal receivingl transmitting apparatus Time difference (i.e. transmission time between the transmission time information included in the receiving time information and optical test signal of trial signal Value) distance value for obtaining each optica signal receivingl transmitting apparatus and mobile terminal can be calculated；In addition it is also possible to utilize optical test signal Phase difference takeover time difference or signal strength values, are calculated the distance between optica signal receivingl transmitting apparatus and mobile terminal.
It is preferred that, the step in the present embodiment is held in the optic communication primary processor being connected with optica signal receivingl transmitting apparatus OK.
In one of the embodiments, the step of being communicated by optica signal receivingl transmitting apparatus group with mobile terminal include with Lower step：
Compare the optical test signal intensity level that each optica signal receivingl transmitting apparatus in optica signal receivingl transmitting apparatus group is received, it is determined that Wherein the corresponding target optica signal receivingl transmitting apparatus of highest optical test signal intensity level, is obtained by target optica signal receivingl transmitting apparatus and moved The upward signal of dynamic terminal；
Downstream signal is sent to mobile terminal by each optica signal receivingl transmitting apparatus in optica signal receivingl transmitting apparatus group.
In the present embodiment, in uplink communication, all optica signal receivingl transmitting apparatus in optica signal receivingl transmitting apparatus group can The optic communication signal of mobile terminal transmission is received, obtains what wherein received signal strength highest optica signal receivingl transmitting apparatus was received Optic communication signal, can improve the reliability for obtaining the optic communication signal that mobile terminal is sent；In downlink communication, due to light letter The power limit and the changeability of mobile terminal locations of number R-T unit, in order to maintain proper communication, optica signal receivingl transmitting apparatus All optica signal receivingl transmitting apparatus in group send downstream signal to mobile terminal, it is ensured that sender has sufficiently high power, makes Communication between optica signal receivingl transmitting apparatus and mobile terminal had not only had sufficiently high traffic rate but also with sufficiently low bit error rate.
In one of the embodiments, the step of being communicated by optica signal receivingl transmitting apparatus group with mobile terminal include with Lower step：
When two or more mobile terminal is communicated with same optica signal receivingl transmitting apparatus group, pass through same optical signal transceiver Device group receives upward signal, and upward signal is all mobile terminals for associating same optica signal receivingl transmitting apparatus group by time division multiplexing Mode send；
Downstream signal is sent simultaneously by same optica signal receivingl transmitting apparatus group to associating same optica signal receivingl transmitting apparatus group All mobile terminals.
In the present embodiment, same optical communication apparatus group may be associated with two or more mobile terminal, i.e., same optic communication Device group can be communicated with two or more mobile terminal, in uplink communication, associate same optica signal receivingl transmitting apparatus group All mobile terminals are sent by time-multiplexed mode, and same optical communication apparatus group can only receive a shifting in synchronization Optic communication signal that dynamic terminal is sent, it is to avoid the signal of different mobile terminal is obscured.
It is preferred that, time-multiplexed mode includes polling mode, random competition mode, poll and is combined with random competition Point coordination mode etc.；In downlink communication, downstream signal is sent simultaneously by same optica signal receivingl transmitting apparatus group same to associating All mobile terminals of optica signal receivingl transmitting apparatus group, if this signal only needs to be sent to one of mobile terminal, other shiftings Dynamic terminal can not receive the downstream signal.
In addition, when there is more than two optical communication apparatus groups, different optical communication apparatus groups and corresponding mobile terminal it Between communication can carry out simultaneously, and the content communicated can be different.
In one of the embodiments, the step of the parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received is obtained Comprise the following steps before rapid：
The intensity level for the optical test signal that each optica signal receivingl transmitting apparatus is received is recorded, wherein, optical test signal is by moving What terminal periodic was sent；
It is further comprising the steps of after the step of being communicated by optica signal receivingl transmitting apparatus group with mobile terminal：
Judge the intensity for the optical test signal that each optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group of record is received Whether value is both greater than the preset strength threshold value, if it is not, the flash ranging that each optica signal receivingl transmitting apparatus for then obtaining state-of-the-art record is received The intensity level of trial signal, is back to the intensity level and the step of the size of preset strength threshold value for being respectively compared each optical test signal Suddenly.
In the present embodiment, mobile terminal can periodically send optical test signal, be received in optica signal receivingl transmitting apparatus After optical test signal, the intensity level of optical test signal can be recorded.Because the position of mobile terminal is moved, originally and mobile terminal The optica signal receivingl transmitting apparatus group of association may can not carry out proper communication with mobile terminal, now due to mobile terminal position Through changing, accordingly, the intensity that each optica signal receivingl transmitting apparatus receives the optical test signal of mobile terminal can also change, according to note The intensity level of the optical test signal of record can associate optica signal receivingl transmitting apparatus group again for mobile terminal, be received by new optical signal Transmitting apparatus group is communicated with mobile terminal, has been well adapted for the mobility of mobile terminal, it is ensured that proper communication.
It is preferred that, mobile terminal can be sent by Unified Power and mobile terminal is included in optical test signal, optical test signal Identity signal, the identity signal in optical test signal can distinguish the optical test signal it is corresponding it is mobile eventually End.
It is preferred that, judge to pass through whether optica signal receivingl transmitting apparatus group can carry out the process of proper communication to sentence with mobile terminal The intensity level for the optical test signal for whether having optica signal receivingl transmitting apparatus to receive in disconnected optica signal receivingl transmitting apparatus group is strong less than default Threshold value is spent, condition is met simply by the presence of more than one optica signal receivingl transmitting apparatus, then can be determined that optica signal receivingl transmitting apparatus group can not Proper communication is carried out, it is necessary to reselect optica signal receivingl transmitting apparatus group with mobile terminal.
It is preferred that, the intensity level of optical test signal is recorded by optica signal receivingl transmitting apparatus.
In one of the embodiments, the optica signal receivingl transmitting apparatus associated with mobile terminal is determined according to each optical test signal The step of group, is further comprising the steps of：
When there is two or more mobile terminal, the optica signal receivingl transmitting apparatus group associated with each mobile terminal is determined respectively；
Judge that the optica signal receivingl transmitting apparatus group associated by current mobile terminal neutralizes the light letter associated by other mobile terminals It whether there is identical optica signal receivingl transmitting apparatus in number R-T unit group；
If so, then by the optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group associated by other mobile terminals and currently The optica signal receivingl transmitting apparatus in optica signal receivingl transmitting apparatus group associated by mobile terminal merges into big group of optica signal receivingl transmitting apparatus, and Set up big group of optica signal receivingl transmitting apparatus and current mobile terminal, the incidence relation of other mobile terminals.
In the present embodiment, judge each optica signal receivingl transmitting apparatus group associated with each mobile terminal with the presence or absence of shared light Signal receiving/transmission device, if in the presence of, then it represents that the position of corresponding each mobile terminal is close enough, can be combined into each mobile terminal One group, corresponding each optica signal receivingl transmitting apparatus group is also combined into one group, until any two optica signal receivingl transmitting apparatus group does not all have Common optica signal receivingl transmitting apparatus.There is no common optica signal receivingl transmitting apparatus, Ke Yiyou between different optica signal receivingl transmitting apparatus groups Effect suppresses the interfering between different groups when carrying out uplink communication, and effectively suppresses the different groups when carrying out downlink communication Between interfere so that the communication of different group is either up or descending can carry out simultaneously.
In one of the embodiments, optical communication method is applied to visible light communication.
In the present embodiment, optical communication method is applied to visible light communication, it is seen that light can carry various signals of communication, just In modulation, and visible light communication can be carried out while illumination is realized.
In one of the embodiments, optica signal receivingl transmitting apparatus is LED illumination lamp, LED illumination lamp Including photo-sensitive cell；
The step of being communicated by optica signal receivingl transmitting apparatus group with mobile terminal comprises the following steps：
Under signal waveform parameter progress by adjusting each LED illumination lamp in LED illumination lamp group Row communication；
Uplink communication is carried out by the photo-sensitive cell of each LED illumination lamp in LED illumination lamp group.
In the present embodiment, LED illumination lamp is communicated with mobile terminal by carrier wave of visible ray, up During communication, the letter of mobile terminal is received by the photo-sensitive cell of each LED illumination lamp in LED illumination lamp group Number, in downlink communication, by the signal wave parameter for adjusting each LED illumination lamp in LED illumination lamp group Number sends a signal to mobile terminal.Optical signal communications can be carried out using LED illumination lamp while illumination is realized.
According to above-mentioned optical communication method, the present invention also provides a kind of optical communication equipment, and just the optic communication of the present invention is set below Standby embodiment is described in detail.
It is shown in Figure 2, it is the structural representation of optical communication equipment in one embodiment of the invention.Light in the embodiment Communication equipment, including following device：
Optica signal receivingl transmitting apparatus 210, for sending or receiving optical signal, including receives optical test signal, wherein, optical tests Signal is sent by mobile terminal；
Optic communication primary processor 220, the parameter value for obtaining the optical test signal that each optica signal receivingl transmitting apparatus is received, The optica signal receivingl transmitting apparatus group associated with mobile terminal is obtained according to the parameter value of each optical test signal, is filled by optical signal transceiver Group is put to be communicated with mobile terminal.
In one of the embodiments, the parameter value of each optical test signal is the intensity level of each optical test signal, optic communication Primary processor 220 is used for size of the intensity level with preset strength threshold value for being respectively compared each optical test signal, chooses optical tests letter Number intensity level is more than the optica signal receivingl transmitting apparatus of preset strength threshold value, using the set of the optica signal receivingl transmitting apparatus of each selection as Optica signal receivingl transmitting apparatus group.
In one of the embodiments, optica signal receivingl transmitting apparatus 210 is additionally operable to record what each optica signal receivingl transmitting apparatus was received The intensity level of optical test signal, wherein, optical test signal is sent by mobile terminal period；
Optic communication primary processor 220 is additionally operable to judge each optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group of record Whether the intensity level of the optical test signal of reception is both greater than preset strength threshold value, if it is not, then obtaining each optical signal of state-of-the-art record The intensity level for the optical test signal that R-T unit is received, is respectively compared the intensity level and preset strength threshold of each optical test signal again The size of value.
In one of the embodiments, optic communication primary processor 220 is additionally operable to when there is two or more mobile terminal, respectively It is determined that the optica signal receivingl transmitting apparatus group associated with each mobile terminal；
Judge that the optica signal receivingl transmitting apparatus group associated by current mobile terminal neutralizes the light letter associated by other mobile terminals It whether there is identical optica signal receivingl transmitting apparatus in number R-T unit group；
If so, then by the optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group associated by other described mobile terminals and The optica signal receivingl transmitting apparatus in optica signal receivingl transmitting apparatus group associated by the current mobile terminal merges into optical signal transceiver dress Put big group, and set up big group of optica signal receivingl transmitting apparatus and the current mobile terminal, the incidence relation of other mobile terminals.
The optical communication equipment of the present invention and the optical communication method of the present invention are corresponded, in the implementation of above-mentioned optical communication method The technical characteristic and its advantage that example is illustrated are suitable for the embodiment of optical communication equipment.
In a specific embodiment, optical communication equipment can apply to the scene of room lighting.The field of room lighting What scape was mainly applied is visible ray, but the optical communication equipment of the present invention is not limited solely to visible light communication, can also be applied to it The optic communication of his type.
Under the scene illuminated indoors, optical communication equipment is fixed on the LED on roof comprising multiple (more than at least three), What is communicated is several mobile terminals.Do not only have controllable illuminator LED lamp bead, also photo-sensitive cell in each LED； In same mobile terminal, not only there is photo-sensitive cell, also there is controllable light source (LED lamp bead).The LED/light source that roof is fixed has illumination concurrently With signal emission function, and there is appropriate gap between LED lamp bead, using these gaps, photo-sensitive cell can be installed, pass through and adjust Whole LED lamp bead and the height at photo-sensitive cell mounting seat bottom, the light that can be sent LED lamp bead are not irradiated to the photosensitive member on side Part, so that the interference to itself will not be produced.Similarly, in mobile terminal, also containing illuminating source and photo-sensitive cell, pass through The height at emitting led lamp bead and photo-sensitive cell seat bottom is adjusted, the interference to itself will not be also produced in mobile terminal.Each room Top LED can be communicated with terrestrial mobile terminal by carrier wave of visible ray.Generally it is divided into by the direction of propagation of signal descending With it is up, it is descending refer to signal by roof lamp is sent and direction that ground based terminal is received, it is and up then just the opposite.Each LED Logical block is contained in inside, and the logical block is connected to primary processor in a wired fashion, so, and the logical block of each lamp can To carry out bidirectional data transfers with primary processor.When an only movable termination, the mobile terminal is periodically sent for fixed The identity marks signal of position, these are distributed in the photo-sensitive cell in different LEDs, can receive the identity that the mobile terminal is sent Marking signal, when the quantity for receiving the lamp of identity marks signal of the mobile terminal is no less than 3, it is possible to utilize each room The signal that photo-sensitive cell is received in the LED of top carries out analysis calculating, estimates the position where the mobile terminal.The original of positioning One of reason method is to utilize signal intensity, and each lamp can calculate the distance that itself arrives mobile terminal, further, utilize known 3 The coordinate of individual lamp and each lamp are to the distance of mobile terminal, and primary processor can calculate the coordinate of the mobile terminal；The original of positioning The two of reason method are to utilize the time difference, and mobile terminal includes transmission time information in transmitted identity signal, now, Each roof reception device calculates the time of signal straightline propagation in the air according to the time for receiving signal, and then calculates and originally connect Receiving apparatus and dispensing device are one of the air line distance between terrestrial mobile terminal, similar principles method, utilize known 3 lamps Coordinate and each lamp to the distance of mobile terminal, primary processor can calculate the coordinate of the mobile terminal；In addition it is also possible to Phase difference takeover time difference or signal intensity are adjusted the distance and calculated, and further estimate movement using the measurement result of multiple points The coordinate of terminal, determines the position of mobile terminal.Due to how much there is certain error, institute to the measurement of physical quantity in physical device So that the possibility span of mobile terminal coordinate is called estimating or estimated sometimes in this specification.Determine using to mobile terminal Bit function, optimizes the current waveform of each LED lamplight so that the illumination in all places reaches the requirement specified (if not in room Less than 400lux), and the luminous power of downlink communication then only integrated distribution in the local small range residing for terrestrial mobile terminal, this Sample can avoid being wasted in the luminous flux for being additionally implemented for communication into the other places that need not be communicated.When mobile terminal locations occur compared with When substantially changing, the current waveform of each LED of primary processor re-optimization remains that the luminous flux of downlink communication is only concentrated It is distributed in the local small range residing for terrestrial mobile terminal.The proper communication between mobile terminal and roof lamp had so both been kept, Ensure that illumination is not influenceed by mobile terminal position again.When there are two or more removable mobile terminals, lead to Cross and perceive whole mobile terminals each residing current location, the waveform parameter of each LED of adjustment makes the power shape of downlink communication Pointed into the concentration of local with number of terminals as many, a corresponding terminal is respectively directed to, to ensure to drop while proper communication Low equipment total power consumption is without influenceing the illumination in other indoor regions.It can be detected often by the photo-sensitive cell in roof LED The signal containing itself unique mark that individual mobile terminal is sent, and then estimate the location of each mobile terminal.When every When having sufficiently large spacing between individual terminal, the downlink communication luminous flux needed for each lamp can be provided by different LEDs, and And the direct sighting distance range of exposures non-overlapping copies of these lamps, now each terminal by range of exposures non-overlapping copies one group of lamp with Communication, the signal for so avoiding to issue different terminals during downlink communication disturbs each other；When in the presence of two or two More than mobile terminal be separated by too near so that it cannot finding that radiation flux is sufficiently large and LED of irradiated region non-overlapping copies for them When lamp is combined, the two or several mobile terminals are just combined into one group, them is shared one group of roof LED communicated, The direct sighting distance irradiation area of this group of lamp contains terrestrial mobile terminal and direct sighting distance irradiation that these are positioned proximate to Scope with it is all other have communicate point to lamp the equal non-overlapping copies of direct irradiation scope.It may be noted that being only used for the light of illumination Flux (or luminous power) is not contributed communication, and the luminous flux (or luminous power) for being used to communicate both is contributed to communication, also right Illumination is contributed.Power of communications is concentrated the regional area for pointing to each mobile terminal position, and make this sensing all the time Each movable termination position can be tracked, even if also power of communications has the adaptability to terminal location, is only ensured all the time each Regional area where terminal has enough communication performances, can save significantly on luminous power of the consumption in communications portion, reach energy-conservation Purpose.
When there are two or more movable terminations, entered according to the current location of the whole mobile terminals perceived Roof LED, i.e., be divided into some packets, grouping number is no more than terminal by row optimization packet by mobile terminal locations situation Count, the LED in every group is dynamically associated with one or more mobile terminals, the principle of optimization is the same of guarantee proper communication When reduction equipment total power consumption without influenceing the illumination in other indoor regions.In order to ensure between roof LED and terrestrial mobile terminal Communication not only have and sufficiently high traffic rate but also had sufficiently low bit error rate, just must allow sender that there is sufficiently high work( Rate.For downlink communication, due to the power limit and the changeability of mobile terminal locations of each LED, in order to maintain positive normal open Letter, it is desirable to have sufficient amount of roof lamp launches same signal to corresponding mobile terminal；And for uplink communication, then because ground The transmit power of face movable termination is limited and is not suitable for using laser (may injure human eye using laser), needs to make up lead to It is in certain divergent shape to believe light beam, therefore is also required to merge the electric signal that some multiple photo-sensitive cells are produced, and produces enough electricity Stream, just can recognize that the upward signal.The symmetry propagated using light up-downgoing, makes pair of one group of lamp and one group of mobile terminal It should be related to that for up-downgoing be identical, its so existing physical basis are conducive to simplifying the difficulty of equipment realization again.From saving LED number in the angle of energy, a group can not be too many, too many both to waste energy, may cause to be not belonging to this group again Other terrestrial mobile terminals there is no enough roof lamps to communicate with.Therefore need according to current all terrestrial mobile terminals Quantity and location situation, are optimized to the packet between roof LED and terrestrial mobile terminal.Shifting in a group Dynamic number of terminals, minimum only one of which includes up to whole terminals.When mobile terminal negligible amounts and mutually have relatively large distance when, Every group of only one of which mobile terminal can be accomplished；When all mobile terminals are assembled at one, these terminals can only belong to same One group.When there are two or more communication packets, the communication of difference group can be carried out simultaneously；With in group during downlink communication Terminal from LED to the group sends identical signal simultaneously, or this signal is to be broadcast to all mobile terminals in group Only one of mobile terminal is given in unicast；During uplink communication, if with there are multiple mobile terminals in group, simultaneously can only There is a mobile terminal to send signal, different mobile terminal sends upward signal by time division multiplexing mode, for different mobile whole The uplink information sent is held, master is transmitted to by the communications processor element for receiving a mobile terminal signal most strong roof lamp Processor；Content of Communication between each group LED and mobile terminal associated with it can be different.It is well known that communication link Quality is mainly by the SNR influence of receiving terminal received signal, and signal to noise ratio is bigger, can just obtain higher traffic rate or Lower bit error rate is obtained under conditions of traffic rate is constant.In optical communication equipment, receive signal and be derived mainly from directly Line-of-sight propagation, because the central symmetry axis that all roof LED lamp beads light is usually directed vertically to ground, from most effectively receiving Signal angle, the photosurface of each mobile terminal preferably (or makes the normal direction of the mobile terminal photosurface vertical parallel to ground In ground), but the influence being accustomed to according to the difference of actually used terminal equipment type and user, each mobile terminal photographic department The orientation of part can offset from perpendicular.A variety of packet schemes are there may be, in the condition for the communication requirement for meeting each mobile terminal Under, according to the packet scheme that the minimum Object selection of total power consumption is optimal.Packet count may at least only have one group, now have two kinds again May, one is indoor only one mobile terminal, although two be there is two or more mobile terminal because they by it is too near or There is the more apparent reason such as overlapping to cause the room communicated with different terminals not close to but because the region pointed to of photosensitive-member of each terminal Ceiling light has to have common factor, and now all mobile terminals are included into one group；Packet count is at most equal with terrestrial mobile terminal number, this When each mobile terminal have different lamps be associated composition one group.When there is multiple packets, due to the room in each group Ceiling light and mobile terminal are different, ensure that the signal between each group is either up or descending does not all do mutually during packet Disturb, therefore the communication of different groups can be carried out simultaneously.For each packet, its communication is divided into uplink and downlink, in downlink communication When, all roof LEDs are identicals in the signal that synchronization is sent in the group；And in uplink communication, if the group is deposited In two or more mobile terminals, then synchronization can only have a terminal to send signal, different terminals need with when The mode of multiplexing is divided alternately to send, the uplink information sent for different terminals, although there may be the up of multiple roof lamps to lead to Letter receiving unit can be properly received the terminal transmitted information, from the principle for improving reliability, by receiving the terminal The communications processor element of a signal most strong roof lamp is transmitted to primary processor.Well-known time division multiplexing mode has poll Point coordination mode that mode, random competition mode, poll are combined with random competition etc..Explanation is also needed to, when there are multiple rooms During the packet of ceiling light and mobile terminal, between while there is the mobile terminal in the roof LED and the group of each packet Two-way communication, if using Y-connection between each roof lamp and primary processor, the communication data of the group can be immediately forwarded to Other packet or outer net；And if using bus connection between each roof lamp and primary processor, the uplink communication data of each group are also needed By caching, wait primary processor to extract one by one and be then forwarded to other packet or be forwarded to outer net.
After the completion of packet, there may be some lamps to be not belonging to any packet, they need to only play a role in lighting.There may also be end End can not find packet, because its communication requirement can not be met.Optimization packet problem is represented with mathematical modeling, including target letter Number and constraints two large divisions.Object function is the power consumption sum of all roof lamps or being produced for all roof lamps Raw luminous flux sum, because they are directly proportional, the two targets are of equal value.Constraints includes three aspects：One is Constraint produced by lighting demand, this is the condition for needing to be met everywhere in room；Two be the constraint that communication requirement is produced Condition, generally at least includes the constraint corresponding to two kinds of demands of traffic rate and bit error rate；Three be noiseless constraint, That is the transmission signal of any one packet does not disturb the recipient for belonging to other packets (actually to the recipient of other packets The interference of generation can be ignored).Mobile terminal quantity than it is larger when, accurate solving-optimizing packet problem has very high calculating to answer Miscellaneous degree, it is difficult to realize Real-time Decision.Typically be not in the larger situation of mobile terminal number for house condition；And if in public affairs Common occasion, then the optimization packet Solve problems in the case of needing consideration mobile terminal number larger, to reach Real-time Decision purpose, Precision can be sacrificed, the raising of speed of decision is exchanged for.
Each LED contains at least one lamp bead, drive control unit, photosensitive unit, a uplink communication and connect Module and communications processor element are received, drive control unit receives the waveform parameter and communication data of communications processor element to control LED current waveform is so as to realize downlink communication；Communications processor element is connected except the drive control unit with affiliated LED Connect, to outside its transfer control instruction or downlink information, be also connected with uplink communication receiving module, primary processor, it is up to carry out Or the processing of downlink information；By signal cable with bus or with star-like mode and master between the communications processor element of different LEDs Processor is connected, to carry out quick bidirectional data transfers.LED is as a part for optical communication equipment, and its effect is information Forwarding.Its forwarding has a two types, and one is to enter row information forwarding between different movable terminations indoors, and two be indoors may be used The forwarding of information between mobile terminal and outer net.Either between different mobile terminal information forwarding, or indoor moving is whole The forwarding of information between end and outer net, is required for needing duplex logical between two-way converting, therefore LED and terrestrial mobile terminal Letter.Duplex communication between LED and terrestrial mobile terminal is divided into downlink and uplink.It is descending to refer to roof LED hair, ground moving The communication that terminal is received, it is up, refer to terrestrial mobile terminal hair, the communication of roof LED receipts.In order that each roof LED has letter Number sending function, it comprise at least the lamp bead quantity and each lamp bead that have in a LED lamp bead, a LED watt level, Volume is relevant, generally, and all lamp beads of a LED use simple series connection method, so as to flow through the electric current phase of each lamp bead Together.Because each LED will undertake illumination and communication dual-use function, and this function can be adjusted dynamically on demand, therefore each LED has single drive control unit, and the main function of drive control unit is according to the information control flow mistake to be transmitted The electric current of each lamp bead, reaches the purpose of downstream signal modulation；Drive control unit will can also adjust illumination and the shared work(of communication The ratio of rate, this needs the value for receiving external command and changing drive control parameter according to command content, has the electric current of LED There is the waveform specified.Therefore a communications processor element is provided with LED, one of the function of communications processor element is will be descending logical Letter data and drive control parameter are conveyed to drive control unit, drive control unit is sent downlink communication with specific mode Data.Roof LED will also have uplink communication function, therefore in each LED, some senses are embedded in LED lamp bead gap Optical element, the signal for receiving uplink communication, the signal that these photo-sensitive cells are received is handled through uplink communication receiving module After be transformed into data signal, handled by the communications processor element of the lamp, therefore the function of communications processor element two is to up The data signal that Communications Processor Module is sent is handled, and the operation such as is packaged, forwards to it.Above and below communications processor element is The terminal of row information, the information come in for outer net, it is necessary to be transferred to the communications processor element in LED from primary processor, Again through downlinking to mobile terminal；The information of outer net is sent to for mobile terminal, communications processor element needs to be passed to master Processor, then outer net is sent to by primary processor.Therefore, the communications processor element in each roof LED needs and main process task Device carries out bidirectional data transfers.Because distance is near, bus mode or star fashion are selected by primary processor and all roof LED The communications processor element of lamp carries out wired connection.When being connected using bus mode, connect more convenient, the quantity limit of roof LED System is not strict, but the rate of information throughput when the quantity of lamp is more between each communications processor element and primary processor can substantially drop It is low；Using Y-connection, on roof during the negligible amounts of LED, using the central processing unit mainboard structure of multinuclear, multiport, The real parallel transmission of different port information can be achieved, transmission rate, but the roof lamp that this mode is supported can be greatly improved Quantity is smaller, and wiring is also inconvenient.
Each mobile terminal period, by Unified Power send the test signal containing its unique identity, each Receive the test signal LED communications processor element reported signal strength from uplink communication receiving module to the lamp, each The communications processor element of LED maintains a terminal signaling intensity table, records what the uplink communication receiving unit of the lamp was detected The intensity that each mobile terminal sends out test signal newest, primary processor to be received indicates to require each lamp transmission terminal signaling intensity During the instruction of table, the table is transmitted.In order to allow the primary processor of equipment to grasp the latest position of each mobile terminal, so as to adjustment in time The packet of roof lamp and mobile terminal using the optical communication equipment set up to each mobile terminal locations, it is necessary to periodically be carried out Measurement.Photo-sensitive cell is installed in optical communication equipment involved in the present invention, its roof LED, it is whole for receiving ground moving The signal sent is held, the intensity of the signal can be measured by uplink communication processing unit.To the measuring principle of mobile terminal locations Loss based on spot light institute transmission signal during straightline propagation is totally dependent on propagation distance, in turn, according to known Signal transmitting power and the received signal power that measures of reception device can determine between spot light and reception device away from From.When ground has more than one movable termination, the test signal that each terminal is sent, which needs to include, uniquely to be represented The mark of the terminal identity, so, recipient just can distinguish the signal is sent and measured from the terminal by which terminal Signal intensity is simultaneously recorded in terminal signaling intensity table.Each roof LED may detect more than one terminal and send Test signal, the communications processor element of each roof lamp needs to maintain a table, each shifting that the roof LED is detected The test signal intensity that dynamic terminal is sent.Typically, the signal intensity detected by measuring circuit be can continuous value simulation Amount, the analog quantity is transformed into digital quantity after steering D/A conversion, it is possible to is stored and is further processed.In order that every Record the intensity of the signal of each movable termination in the lamp communication range received individual roof lamp energy exhaustive, The frequency or phase that each terminal sends test signal can not be identical, otherwise uplink communication processing unit can be caused not know Signal is not gone out.The method for avoiding the occurrence of such case is that each mobile terminal sends in the repetition rate of test signal and includes one The correction that can change at random, can so avoid occurring two terminals for a long time in while sending the situation of test signal. The terminal signaling intensity table that each roof LED is maintained, its purposes is to have detected whether that terminal location there occurs for primary processor Significant change and then need to carry out re-optimization packet to roof lamp and mobile terminal.Therefore primary processor can periodically send finger Order, indicates that the communications processor element of each LED uploads its newest terminal signaling intensity table maintained, according to all roof lamps The terminal signaling intensity table uploaded, it can be deduced that the situation of all mobile terminals, decides whether to be grouped again, such as Fruit needs to be grouped again, then roof LED and mobile terminal is grouped again by the optimization group technology of the present invention.
When there are two or more movable terminations, when apparent motion occurs for the position of any one mobile terminal So that when the communication of the mobile terminal and LED associated with it packets can not continue to ensure, then by this group of Nei Xuanyige mailing address Reason unit sends association request again to primary processor, it is desirable to re-start LED optimization packet, and primary processor receives this again After association request, an instruction is broadcasted to all lamps, indicates that each lamp uploads the terminal signaling intensity table of its maintenance, waits to collect neat After the terminal signaling intensity table of all lamps, packet is optimized to LED, packet and its associated movement belonging to each lamp is determined Packet associated result, is then broadcast to the communications processor element of each roof LED by terminal.When there are two or more During mobile terminal, these terminals can be divided into several groups by equipment according to the present present position of each of which.Any one end The movement at end, may all cause former group technology to continue to keep between each terminal and roof LED associated with it just Normal two-way communication.If the amount of movement of a terminal is smaller, both do not interfered with the terminal in itself and at present with the terminal association Two-way communication between roof LED, does not also disturb or influences the mobile terminal and roof LED in an existing any other packet Two-way communication between lamp, then vary without existing each mobile terminal and the incidence relation of roof LED；If the shifting of a terminal Momentum is sufficiently large, then in the existing roof LED with the terminal association, at least one can pass through its up communication receipt module The intensity of the test signal from the mobile terminal is detected less than the threshold value needed for maintenance proper communication so that existing pass Connection group technology is it cannot be guaranteed that the two-way communication of all movable terminations is needed, it is necessary to send reconstruction point to primary processor immediately All roof LEDs and all mobile terminals are grouped by the request of group association again, it is determined which room included in each group LED and mobile terminal are pushed up, that is, sets up roof LED and the packet associated of mobile terminal.Original is detected in being grouped when one Come the signal intensity of terminal that is associated will or already below minimum threshold roof LED only one of which when, just by the room The communications processor element for pushing up LED sends the application for rebuilding association request to primary processor；If it is whole to be detected simultaneously by the movement Hold causes the signal that its up communications reception unit is received less than existing and terminal association of minimum threshold because mobile range is big Roof LED quantity more than one, then one is selected at random from these roof LEDs, by the logical of selected roof LED Letter processing unit sends association request again to primary processor.Primary processor receives the weight from any one communications processor element After new association request, an instruction is broadcasted to the communications processor element of all roof LEDs, indicates that each communications processor element is uploaded Its newest terminal signaling intensity table maintained.Primary processor collects the terminal of communications processor element contained by all roof LEDs After signal intensity table, new group technology is calculated, it is determined that the roof LED in each mobile terminal affiliated packet and the group. When primary processor receives multiple association requests again simultaneously, Exactly-once rebuilds packet associated program, ignores unnecessary weight New association request.
When only one of which mobile terminal, actually only one of which group in equipment, only unique mobile terminal and one in group It is a little by the preferred roof LED communicated, it is being included in group with communication of mobile terminal roof LED needs with The position of the mobile terminal changes and dynamic is adjusted, now, when any one roof lamp inspection originally with the terminal communication is measured The received signal from the mobile terminal is too weak, so that the lamp can not continue to continue to communicate with the unique mobile terminal When, the communications processor element of the roof LED will send request, re-optimization selection and the unique mobile terminal to primary processor The roof LED combination of communication.
The terminal signaling intensity table that primary processor is submitted according to the communications processor element of each lamp collected, is each movement Terminal determines its other-end with the LED of the terminal association and the group.Primary processor sets a signal intensity threshold G, And be each terminal number by random sequence, it is then that each mobile terminal finds out all reception movements according to terminal number order Terminal signaling intensity is more than G lamp and these lamps is included to the group associated with the mobile terminal, then to newly including the every of the group Individual lamp, searches its terminal signaling intensity table, and other terminals that the lamp received signal intensity is more than G are included the group, then right The terminal newly included, will receive the new all lamps of the terminal signaling intensity more than G of including and also includes the group, so repeat, until It can be added without new member, preserve the incidence relation table of this group；Other are not yet determined with the mobile terminal of incidence relation is repeated Association process is stated, until all terminals all determine the packet of association or all lamps have determined that affiliated packet.Association process After the completion of, if the lamp that can not be associated with mobile terminal, then the lamp issued light is only for illumination；If terminal fails to find The lamp of association, then the lamp be in unfavorable position, can not temporarily carry out visible light communication.To have avoided the long-term nothing of mobile terminal Method communicates, equipment at regular intervals just to the update of incidence relation of LED and mobile terminal once.Claimed herein is It is a kind of received according to roof LED by the intensity of terrestrial mobile terminal signal transmitted come to roof LED and ground shifting The method that dynamic terminal carries out packet associated.Listed in the terminal signaling intensity table that each communications processor element is submitted to primary processor The signal intensity that the uplink communication receiving unit of the communications processor element affiliated LED is received is more than coming for minimum threshold G Just correspondence one can be with the roof for a record in identity and signal intensity from any one mobile terminal, the table LED carries out a mobile terminal of normal upstream communication.According to light rectilinear propagation properties, with reference to LED lamp bead in roof lamp Close with photo-sensitive cell is alternately distributed characteristic, and the roof LED also can with mobile terminal signified in record in down direction Proper communication；Unlisted other mobile terminals then can not proper communication and will not be to any at this in the roof LED and table Although unlisted in the received signal strength table of lamp or list but mobile terminal and other rooms of received signal strength less than G Communication between ceiling light produces interference.The LED and mobile terminal of all participation visible light communications are divided into some by this programme Group, the different group of any two is all without common member, and each group includes at least one roof LED and at least one movement Terminal, is especially stressed that：The test signal identified with own identification is sent with equal-wattage in each mobile terminal Under the premise of, if the signal that a mobile terminal is sent can be by the uplink communication receiving unit of two or more roof LED just Really receive the signal intensity sent from the same mobile terminal that the uplink communication receiving unit in these i.e. lamps is received All it is higher than minimum threshold value G, then these lamps all belong to same group with the mobile terminal；On the other hand, if same roof LED The uplink communication receiving unit of lamp can receive the intensity from two or more different mobile terminals more than minimum threshold Signal, then these mobile terminals and the roof LED belong to same group.Therefore by all roof LEDs and ground in equipment Face mobile terminal, which is grouped, to be set up after the bi-directional association between transceiver, has both effectively been inhibited when carrying out uplink communication not With interfering between group, and the interfering between different groups when carrying out downlink communication is effectively inhibited, so that different The communication of group is either up or descending can carry out simultaneously.Need to further illustrate, in same group, due to roof LED Lamp and ground movable fixture have the transmission and reception circuit being separated from each other, if each there is the letter of uplink and downlink separation Number process circuit and processing unit, then can be achieved uplink and downlink full-duplex communication；If having two or more mobile terminals, often There can only be a mobile terminal to carry out the transmission of upward signal in one group simultaneously, and it is descending, always allow with all in group LED sends identical signal, but, in order to save energy consumption, can use different in synchronization with the different lamps in group Signal amplitude that is, the different transmission power of use are while send identical signal, in synchronization, the reception pair of downlink information Either as being terminal in the group specified, or it is whole terminals in group.Any moment all there may be some roofs LED Lamp is not belonging to the group that any one has mobile terminal to be associated, and these roof LEDs constitute a particular set, this set In member temporarily only play a role in lighting, but with the movement of some or some mobile terminals, member of this set can be in Existing dynamic change, with the refreshing of packet associated relation, may both have member to be exited from this set and be selected into some and (lead to Letter) group, it is also possible to temporarily endless can be communicated with and added after the member that some (communication) is organized exits group where original originally Enter this particular set.
Specifically, as shown in figure 3, optical communication equipment include N number of LED and primary processor, led to optical communication equipment That believes has M mobile terminal.In figure, each LED by communications processor element, driver element, uplink communication receiving unit, on Row caching is constituted.Wherein communications processor element and driver element unilaterally connected, represent that communications processor element can be by signal waveform Control parameter or the data to be transmitted convey to driver element；Communications processor element has two kinds of lists with uplink communication receiving unit To line, a kind of to be used to pass on the control instruction that communications processor element issues uplink communication receiving unit, one kind is used for up logical Communication data is uploaded to communications processor element by letter receiving unit；Communications processor element is unidirectionally connected with up caching, represents logical Letter processing unit will be uploaded to the communication data of primary processor and first be put into up caching, by primary processor from the upper of each LED Row caching is selected a good opportunity extraction.All LEDs are bi-directionally connected with primary processor by bidirectional bus, the instruction that primary processor is sent Or data can be communicated directly to the communications processor element in each roof LED, but the communications processor element in each LED The data of upload need just can connect to bus by up caching, to avoid conflict.If being adopted between each LED and primary processor With Y-connection, then without up caching.Light emitting array and photo-sensitive cell that each roof LED is also constituted containing LED lamp bead The receiving array of composition.LED lamp bead is connected with LED lamp drive circuit and uplink communication receiving unit respectively with photo-sensitive cell, and LED lamp bead and the spatially interleaved arrangement of photo-sensitive cell so that the transmitting light of roof LED and the spread scope for receiving light It is consistent, so as to ensure that uplink and downlink communication transmission characteristic is consistent.
Terrestrial mobile terminal hardware components mainly contain luminous original paper (LED lamp bead), photo-sensitive cell, interface circuit and Wei Chu Manage device.Similarly, the luminous original paper and photo-sensitive cell of terrestrial mobile terminal are also spatially closely and alternatively arranged so that it is launched Light is consistent with the spread scope for receiving light, so as to ensure that downlink channel transmission characteristic is consistent thereon.Interface circuit includes hair Interface and receiving interface are sent, is respectively used to produce the descending communication signal that uplink communication signal and processing are received.Microprocessor is then It is both the core component of data processing, is also source and the command centre for producing upstream data communication.
In optical communication equipment, the core of communications processor element is the stronger microprocessor of a disposal ability；Driver element Comprising numerical portion and analog portion, numerical portion undertakes control signal decoding and data signal subcarrier-modulated function, simulation Part then includes AC/DC transfer, electric current regulation and LED drivings；Uplink communication receiving unit include concentrator (can with it is descending Optical alignment common lens or parabolic reflector), photoelectric tube, the amplifying circuit with automatic growth control, at data signal Part is managed, wherein photoelectric tube and emitting led array is interspersed and on the horizontal plane of different height, it is to avoid transmission signal pair The interference of reception；Up cache needs the Bus repeater by being shared with other roof LEDs for keeping in communications processor element Data to primary processor so that communications processor element is had data to send and bus is accounted for by the transmitting uplink data of other lamps Used time, wait in line in the buffer.
Mobile terminal includes sending module, receiving module and digital signal processing module.Wherein sending module drives including LED Dynamic (containing digital modulation), LED lamp bead, collimation lens or parabolic mirror (can be shared with receiving module)；Receiving module includes Collimation lens or parabolic mirror, photoelectric tube, the amplifying circuit with automatic growth control, digital demodulation signal circuit；Number Word signal processing then has signal transacting and data storage, the data production information flow that i.e. user's using terminal is produced concurrently.
The signal from each mobile terminal received by the uplink communication receiving unit of LED, its intensity passes through sense The amplitude of the photoelectric current produced on optical element is measured, and the range value is represented through D/A switch available digital amount.The value enters one Step is also used for the multiplication factor adjustment of signal amplification circuit so that the pulse amplitude after amplification is in Digital Logical Circuits Normal range (NR).
Communication network is constituted the present invention relates to the equipment of multiple use visible light communications, is needed during specific implementation in network association The physical layer and data link layer of view, which are realized in present invention institute, needs claimed method.Physical layer is except providing device hardware, also Basic function program including Condition Detection and setting and device drives.The functional module of data link layer mainly has logic Link control, data framing, error detection and re-transmission, the mapping of MAC Address and physical label, conflict avoidance etc..Procotol The procotol function of other levels and the function of not being related to substantive content of the present invention of this level in stack, can be by the countries concerned Standard or international standard are realized or transplanted.According to the data link layer protocol designed by the essential idea of the present invention, needed during implementation Will there is provided required by the world of network communication protocol or the function of network layer protocol (IP agreement) of national standard defined Information encapsulation form and logic function, according to top-down design principle in soft project, complete number involved in the present invention According to link layer Software for Design., it is emphasized that no matter how the specific design of communication protocol software is implemented, as long as containing the present invention In core concept, especially controlled respectively, by all lamps including multiple lamps are uniformly distributed in into ceiling, each modulating signal waveform Packet associated is carried out from mobile terminal, makes different groups of communication while carrying out, each mobile terminal locations of periodic detection fit packet It the thought such as should change in terminal location, belong to the scope of protection of the invention.
Fig. 4 is the roof LED and terrestrial mobile terminal of indoor optical communication equipment according to each mobile terminal of Current terrestrial The example that position is grouped.In Fig. 4, there are two mobile terminals a M1 and M2 in ground, and roof is then installed with by being uniformly distributed 16 LEDs (include photo-sensitive cell and carry out the necessary circuitry of two-way visible light communication) L1, L2 ..., L16.According to packet or Set up the optimization principles of incidence relation, the M1 and L3 and L2, L7 directly over it belongs to one group, and M2 then with directly over it L13 and L9, L14 belong to one group.Why group result is in this way, being because the test signal that M1 is sent by specified power is only capable of Effectively received by L2, L3 and L7, i.e., contain only in the received signal strength table of these three roof LEDs of L2, L3 and L7 and show Receive the signal intensity from M1 to exceed in minimum threshold G, the received signal strength table of all other lamp, the signal from M1 Intensity is below G.Similarly, all a received signal strength is higher than G's in L13 and L9, L14 received signal strength table Record, they both are from mobile terminal M2.By above-mentioned group technology, two terminals belong to two different groups, the two groups Communication do not interfere with each other, can carry out simultaneously.In this example, remaining 10 lamp not associated with terrestrial mobile terminal temporarily Play a role in lighting.If the position of terrestrial mobile terminal changes, the received signal strength table of each roof LED has phase It should change, the primary processor in equipment will perform the program that optimization packet is calculated, and the result of packet is by with terrestrial mobile terminal Change in location and be adjusted accordingly.If M2 is motionless and M1 is moved to corner on existing position along the direction away from M2, then again The result of packet is still to be divided to two groups, and packet belonging to M2 is constant, and the roof lamp included in the packet associated by M1 will be L3, L4, L8；If M2 is motionless and M1 is moved to and closed on very much with M2, then only one of which communication set in equipment, two mobile terminals are all Associated with this group, and associated roof lamp is L13 and L9, L14, remaining 13 lamp just only plays a role in lighting.It is further observed that by In there is two mobile terminals to be associated with same group, during uplink communication, the two mobile terminal only one of which of synchronization can be sent out Send upward signal；Because the two mobile terminals close on very much, the strongest received person of their signal transmitteds is precisely same Roof lamp L13, therefore the upstream data that they send is all by L13 communications processor element forwarding.To become apparent from picture, in figure And roof LED and the internal structure and primary processor of terrestrial mobile terminal are not drawn into, they exist all the time.
Fig. 5 is a kind of reality that packet associated method is carried out to roof LED and terrestrial mobile terminal that primary processor is used Example.M is terrestrial mobile terminal sum, and N is the quantity of roof LED, and G is one for needing and setting that communicated according to normal upstream Reception device in roof LED, which can be recognized normally, receives the minimum door from the signal intensity transmitted by terrestrial mobile terminal Sill.Before packet is started, by random sequence to all terminal numbers, that is, it is that ID [n] is to store each terminal iidentification with array ID The mark for the terminal that numbering is n, when re-starting packet every time, the order of each terminal iidentification to being stored in ID arrays makees one Secondary random adjustment；And collect the newest received signal strength table of neat all roof LEDs.Ng tables in grouper running Show packet numbering, since 1；And during grouping process completion, what it was stored is a group number, its span is greater than small equal to 1 In equal to M；Array R is used to record whether each terminal has associated, and R [i] is that the terminal that 0 expression numbering is i is not yet associated (i.e. still Do not determine which group it belongs to), R [i] is that 1 terminal for representing that numbering is i has determined that packet belonging to it.When initial, R assigns initial Value is all 0, represents that all terminals are all not associated." i ← 1 " is expressed as variable i assignment 1.Ensuing process is first to determine numbering It is 1 by all receive from numbering therefore, checking the received signal strength table of each roof lamp for the group belonging to 1 terminal Terrestrial mobile terminal signal intensity be more than or equal to G roof lamp include numbering be 1 terrestrial mobile terminal belonging to group； On the basis of this, the roof LED organized belonging to the terrestrial mobile terminal that numbering is 1 has been included to each, has checked that it receives signal strong Table is spent, the lamp is received into all other mobile terminal of the signal intensity more than or equal to G also includes the mobile terminal institute that numbering is 1 The group of category, and be to have associated by these terminal labels.Then incremental order by number, find it is next be not yet associated it is (i.e. true Group belonging to fixed) mobile terminal, repeat the roof lamp associated by above-mentioned determination mobile terminal and the process with group mobile terminal. This process is constantly repeated, untill all mobile terminals are all determined affiliated be grouped.Complete after packet associated, primary processor will Packet count, the identifying of all roof LEDs in each group, all mobile terminals in each group, each mobile terminal are sent out The information such as the strongest received person of signal make the communications processor element of each roof LED know packet associated by bus broadcast As a result.
In optical communication equipment actual application, the energy-saving effect of optical communication equipment is fairly obvious, below to optic communication The energy-saving effect of equipment is elaborated.
If one long 5 meters, wide 5 meters, high 3 meters of room, 1 meter of height of table top.With 14400 milliwatts of rated power 20, in The lamp bead of the candela of degree of understanding without being told 0.73 is used as illumination and communication, and the half-power angle of each lamp is 60 degree；Correspondingly received device Visual angle is 120 degree, and the refraction coefficient of its condenser is 1.5, and effective photosensitive area of photoelectric tube is 1 square centimeter, lambert's index For 1, opto-electronic conversion response coefficient is 0.4 ampere/watt, and Carrier To Noise Power Density is 10-21Watt/hertz, modulation system uses 4 systems Subcarrier pulse position modulation, in this modulation system, a symbol period is divided into 4 time slots, wherein there is a time slot use In pulse train of the transmission with agreed frequency, information (the 4 system feelings representated by the numbering or location presentation of the time slot symbol Each symbol is containing 2 information under condition), the electric current crest value of the pulse train is designated as ci, electric current valley value is designated as ai, remaining time slot A constant current value is exported, b is designated asi, i is the numbering of roof lamp, ciWith aiDifference determine power of communications, an and symbol The current average in cycle determines total energy consumption and brightness of illumination.Brightness of illumination requirement is 400 lumens；Under these conditions, If it is required that traffic rate is 1Mbps, bit error rate is no more than 10-6, then require communication luminous power that reception device received not Less than -2.3dBmW, because the energy consumption of visible light communication equipment is mainly produced by roof LED in illumination and downlink communication, because The energy consumption of downlink communication is only considered in this this example.If not using each lamp current of the present invention with position adaptability Waveform optimization, then need to ensure that each testing location of whole room floors has enough illumination and power of communications.The cloth of roof lamp Office has a major impact to the energy consumption of equipment.In the case where not considering mobile terminal locations adaptability, choose 3 kinds of placement schemes and enter Row contrast, they are A：4 roof lamps, per lamp containing 3600 lamp beads, the spacing in length and breadth between lamp bead is 1 centimetre, 4 square rooms Ceiling light is disposed adjacent at corner；B：All lamp beads are placed in 1 roof lamp, vertically and horizontally all with 4.16 centimetres of arrangements of proportional spacing, Lamp bead is uniformly covered with whole ceiling；C：All lamp beads are divided into 100 deciles, are placed in 100 different roof LEDs, Each lamp includes 144 lamp beads, is vertically and horizontally uniformly distributed with 4.16 centimeter aparts, is also to be covered with whole ceiling just.Root According to given condition, to equipment founding mathematical models, wherein object function is to make device illumination and downlink communication total power consumption minimum, about Beam condition be and meanwhile ensure illumination and everywhere can proper communication, then with linear programming method, to it is above-mentioned not using position fit The waveform parameter of each lamp of three kinds of schemes of answering property is optimized, and obtains the lowest energy consumption of each scheme, and with being believed using fixed The situation contrast of number waveform, then calculates respective energy-saving efficiency, is shown in Table 1.
Table 1. does not consider the energy-saving efficiency contrast of three kinds of schemes of terminal location adaptability
Scheme A B C
Energy-saving efficiency 27% 38% 57%
It can be seen that, in the various schemes of mobile terminal locations adaptability are not considered, scheme C energy-saving effects are best.By roof LED lamp bead is divided into greater number of lamp, and the optimization of waveform parameter is carried out to each lamp, there is obvious energy-saving effect.
And using being adapted in the visible light communication equipment of mobile terminal locations, due to can by allow it is each it is mobile eventually End sends the test signal of the information containing self identification, roof lamp is measured the position of terminal, therefore can accomplish only to ensure The reception device of terminal position a small range obtains enough power of communications and the communication in other places so exists without ensureing When carrying out the waveform parameter optimization of each lamp, required constraints is limited by communication condition and is relaxed, so as to further reduce The total power consumption of equipment.It is used as the waveform optimization simplified example of a consideration mobile terminal locations adaptability, scheme immediately above C, is laid out and terminal using with its duplicate roof lamp, an only mobile terminal in room, it is considered to be placed in the terminal During three typically different positions, equipment ensures the illumination in ground or all places of desktop in room, but only ensures mobile terminal institute Communication quality in single place, accordingly the waveform parameter to all lamps optimize, obtain the lowest energy consumption of different location.Three Planting type locality is：1. corner, 2. close to the midpoint of any wall, 3. ground centre.Table 2 is to use to be adapted to mobile terminal position In the equipment put, energy-saving efficiency contrast of the terminal in diverse location.
Table 2. considers influence of the terminal location to energy-saving efficiency during terminal location adaptability
As can be known from the results of Table 2, one can be entered using the device energy conservation efficiency with terminal location adaptability of the present invention Step is improved, and energy-saving efficiency is influenceed little by terminal position., it is emphasized that the energy-saving efficiency in table 2 is still by reality Border total energy consumption uses what total energy consumption contrast during fixed waveform was calculated with all lamps, although they are saved compared with the scheme C in table 1 Energy efficiency is only improved less than 4 percentage points, but because ratio here is to have used all lamps all using total during fixed waveform Energy consumption makees denominator, if this denominator to be exchanged with to the energy consumption of scheme C in table 1, has position adaptability using in the present invention Waveform parameter optimization, the equipment relative to terminal location adaptability is not taken, energy-saving efficiency can improve 10% or so.Due to this The half-power angle of each LED lamp bead is taken as 60 degree in embodiment, and the visual angle of reception device is 120 degree, and this is that optical beam ratio relatively dissipates Situation, if they are all reduced, can be such that the light beam sent and received more concentrates, and be adopted so as to can further improve the present invention It is adapted to the energy-saving efficiency of the indoor visible light communication equipment of mobile terminal locations change.
The waveform parameter of terminal location adaptability is optimized it is further observed that taking in the present invention, the energy saved is main Quite a few roof lamp is come to be not required to launch signal of communication, therefore has been beneficial to reduction Communication Jamming, reduction information and be ravesdropping Possibility.Institute's column data ensure that light has sufficient light to ground in example, if on daytime, it is not necessary to when illuminating, Energy-saving efficiency can also be significantly reduced.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (13)

1. a kind of optical communication method, it is characterised in that comprise the following steps：
The parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received is obtained, wherein, the optical test signal is by moving What dynamic terminal was sent；
The optica signal receivingl transmitting apparatus group for determining to associate with the mobile terminal according to the parameter value of each optical test signal；
Communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal；
The parameter value of each optical test signal is the intensity level of each optical test signal, described according to each optical test signal The step of parameter value determines the optica signal receivingl transmitting apparatus group associated with the mobile terminal comprises the following steps：
It is respectively compared the intensity level of each optical test signal and the size of preset strength threshold value；
The optica signal receivingl transmitting apparatus that optical test signal intensity level is more than the preset strength threshold value is chosen, the light of each selection is believed The set of number R-T unit is used as the optica signal receivingl transmitting apparatus group.
2. optical communication method according to claim 1, it is characterised in that each optica signal receivingl transmitting apparatus of acquisition is received Optical test signal parameter value the step of before comprise the following steps：
The intensity level for the optical test signal that each optica signal receivingl transmitting apparatus is received is recorded, wherein, the optical test signal is by moving What terminal periodic was sent；
It is described communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal the step of after, it is in addition to following Step：
Judge the intensity for the optical test signal that each optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group of record is received Whether value is both greater than the preset strength threshold value, if it is not, what each optica signal receivingl transmitting apparatus for then obtaining state-of-the-art record was received The intensity level of optical test signal, is back to the intensity level for being respectively compared each optical test signal and preset strength threshold value The step of size.
3. optical communication method according to claim 2, it is characterised in that the parameter according to each optical test signal The step of value determines the optica signal receivingl transmitting apparatus group associated with the mobile terminal is further comprising the steps of：
When there is two or more mobile terminal, the optica signal receivingl transmitting apparatus group associated with each mobile terminal is determined respectively；
Judge that the optical signal that the optica signal receivingl transmitting apparatus group associated by current mobile terminal is neutralized associated by other mobile terminals is received It whether there is identical optica signal receivingl transmitting apparatus in transmitting apparatus group；
If so, then by the optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group associated by other described mobile terminals and described It is big that the optica signal receivingl transmitting apparatus in optica signal receivingl transmitting apparatus group associated by current mobile terminal merges into optica signal receivingl transmitting apparatus Group, and set up big group of optica signal receivingl transmitting apparatus and the current mobile terminal, the incidence relation of other mobile terminals.
4. optical communication method as claimed in any of claims 1 to 3, it is characterised in that the optical signal transceiver dress LED illumination lamp is set to, the LED illumination lamp includes photo-sensitive cell；
It is described to comprise the following steps the step of communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal：
Descending lead to is carried out by adjusting the signal waveform parameter of each LED illumination lamp in LED illumination lamp group Letter；
Uplink communication is carried out by the photo-sensitive cell of each LED illumination lamp in LED illumination lamp group.
5. a kind of optical communication method, it is characterised in that comprise the following steps：
The parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received is obtained, wherein, the optical test signal is by moving What dynamic terminal was sent；
The optica signal receivingl transmitting apparatus group for determining to associate with the mobile terminal according to the parameter value of each optical test signal；
Communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal；
The parameter value of each optical test signal is the intensity level of each optical test signal, described according to each optical test signal The step of parameter value determines the optica signal receivingl transmitting apparatus group associated with the mobile terminal comprises the following steps：
The distance value of each optica signal receivingl transmitting apparatus and the mobile terminal is obtained according to the intensity level of each optical test signal；
Each distance value is arranged from small to large, the distance value of predetermined number is chosen successively since lowest distance value, it is determined that Each optica signal receivingl transmitting apparatus corresponding with the distance value of the predetermined number, by the collection cooperation of each optica signal receivingl transmitting apparatus of acquisition For the optica signal receivingl transmitting apparatus group.
6. optical communication method according to claim 5, it is characterised in that the optica signal receivingl transmitting apparatus is light emitting diode Illuminating lamp, the LED illumination lamp includes photo-sensitive cell；
It is described to comprise the following steps the step of communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal：
Descending lead to is carried out by adjusting the signal waveform parameter of each LED illumination lamp in LED illumination lamp group Letter；
Uplink communication is carried out by the photo-sensitive cell of each LED illumination lamp in LED illumination lamp group.
7. a kind of optical communication method, it is characterised in that comprise the following steps：
The parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received is obtained, wherein, the optical test signal is by moving What dynamic terminal was sent；
The optica signal receivingl transmitting apparatus group for determining to associate with the mobile terminal according to the parameter value of each optical test signal；
Communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal；
The parameter value of each optical test signal is worth the difference with delivery time value for the time of reception of each optical test signal, It is described according to the parameter value of each optical test signal determine associated with the mobile terminal optica signal receivingl transmitting apparatus group the step of wrap Include following steps：
It is worth each optical signal transceiver dress of difference acquisition with delivery time value according to the time of reception of each optical test signal Put the distance value with the mobile terminal；
Each distance value is arranged from small to large, the distance value of predetermined number is chosen successively since lowest distance value, it is determined that Each optica signal receivingl transmitting apparatus corresponding with the distance value of the predetermined number, by the collection cooperation of each optica signal receivingl transmitting apparatus of acquisition For the optica signal receivingl transmitting apparatus group.
8. optical communication method according to claim 7, it is characterised in that the optica signal receivingl transmitting apparatus is light emitting diode Illuminating lamp, the LED illumination lamp includes photo-sensitive cell；
It is described to comprise the following steps the step of communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal：
Descending lead to is carried out by adjusting the signal waveform parameter of each LED illumination lamp in LED illumination lamp group Letter；
Uplink communication is carried out by the photo-sensitive cell of each LED illumination lamp in LED illumination lamp group.
9. a kind of optical communication method, it is characterised in that comprise the following steps：
The parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received is obtained, wherein, the optical test signal is by moving What dynamic terminal was sent；
The optica signal receivingl transmitting apparatus group for determining to associate with the mobile terminal according to the parameter value of each optical test signal；
Communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal；
It is described to comprise the following steps the step of communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal：
Compare the optical test signal intensity level that each optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group is received, it is determined that Wherein the corresponding target optica signal receivingl transmitting apparatus of highest optical test signal intensity level, is obtained by the target optica signal receivingl transmitting apparatus Take the upward signal of the mobile terminal；
Downstream signal is sent to the mobile terminal by each optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group.
10. optical communication method according to claim 9, it is characterised in that the optica signal receivingl transmitting apparatus is light-emitting diodes Pipe illuminating lamp, the LED illumination lamp includes photo-sensitive cell；
It is described to comprise the following steps the step of communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal：
Descending lead to is carried out by adjusting the signal waveform parameter of each LED illumination lamp in LED illumination lamp group Letter；
Uplink communication is carried out by the photo-sensitive cell of each LED illumination lamp in LED illumination lamp group.
11. a kind of optical communication method, it is characterised in that comprise the following steps：
The parameter value for the optical test signal that each optica signal receivingl transmitting apparatus is received is obtained, wherein, the optical test signal is by moving What dynamic terminal was sent；
The optica signal receivingl transmitting apparatus group for determining to associate with the mobile terminal according to the parameter value of each optical test signal；
Communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal；
It is described to comprise the following steps the step of communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal：
When mobile terminal described in two or more is communicated with same optica signal receivingl transmitting apparatus group, pass through the same optical signal R-T unit group receives upward signal, and the upward signal is all mobile whole of the association same optica signal receivingl transmitting apparatus group What end was sent by time-multiplexed mode；
Downstream signal is sent simultaneously by the same optica signal receivingl transmitting apparatus group to associating the same optica signal receivingl transmitting apparatus All mobile terminals of group.
12. optical communication method according to claim 11, it is characterised in that the optica signal receivingl transmitting apparatus is light-emitting diodes Pipe illuminating lamp, the LED illumination lamp includes photo-sensitive cell；
It is described to comprise the following steps the step of communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal：
Descending lead to is carried out by adjusting the signal waveform parameter of each LED illumination lamp in LED illumination lamp group Letter；
Uplink communication is carried out by the photo-sensitive cell of each LED illumination lamp in LED illumination lamp group.
13. a kind of optical communication equipment, it is characterised in that including following device：
Optica signal receivingl transmitting apparatus, for sending or receiving optical signal, including receives optical test signal, wherein, the optical tests letter Number sent by mobile terminal；
Optic communication primary processor, for handling the optical signal received, including each optica signal receivingl transmitting apparatus of acquisition is connect The parameter value of the optical test signal of receipts, the light associated with the mobile terminal is obtained according to the parameter value of each optical test signal Signal receiving/transmission device group, is communicated by the optica signal receivingl transmitting apparatus group with the mobile terminal；
The parameter value of each optical test signal is the intensity level of each optical test signal, and the optic communication primary processor is used for The intensity level of each optical test signal and the size of preset strength threshold value are respectively compared, optical test signal intensity level is chosen and is more than The optica signal receivingl transmitting apparatus of the preset strength threshold value, the set of the optica signal receivingl transmitting apparatus of each selection is believed as the light Number R-T unit group；
The optica signal receivingl transmitting apparatus is additionally operable to record the intensity level for the optical test signal that each optica signal receivingl transmitting apparatus is received, its In, the optical test signal is sent by mobile terminal period；
The optic communication primary processor is additionally operable to judge each optical signal transceiver dress in the optica signal receivingl transmitting apparatus group of record Whether the intensity level for putting the optical test signal of reception is both greater than the preset strength threshold value, if it is not, then obtaining each of state-of-the-art record The intensity level for the optical test signal that the optica signal receivingl transmitting apparatus is received, is respectively compared the intensity of each optical test signal again The size of value and preset strength threshold value；
The optic communication primary processor is additionally operable to when there is two or more mobile terminal, determines what is associated with each mobile terminal respectively Optica signal receivingl transmitting apparatus group；
Judge that the optical signal that the optica signal receivingl transmitting apparatus group associated by current mobile terminal is neutralized associated by other mobile terminals is received It whether there is identical optica signal receivingl transmitting apparatus in transmitting apparatus group；
If so, then by the optica signal receivingl transmitting apparatus in the optica signal receivingl transmitting apparatus group associated by other described mobile terminals and described It is big that the optica signal receivingl transmitting apparatus in optica signal receivingl transmitting apparatus group associated by current mobile terminal merges into optica signal receivingl transmitting apparatus Group, and set up big group of optica signal receivingl transmitting apparatus and the current mobile terminal, the incidence relation of other mobile terminals.
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