CN104039019A - Visible light communication method, related device and system - Google Patents
Visible light communication method, related device and system Download PDFInfo
- Publication number
- CN104039019A CN104039019A CN201410304752.7A CN201410304752A CN104039019A CN 104039019 A CN104039019 A CN 104039019A CN 201410304752 A CN201410304752 A CN 201410304752A CN 104039019 A CN104039019 A CN 104039019A
- Authority
- CN
- China
- Prior art keywords
- reservation
- active terminal
- time slot
- superframe
- period
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000004891 communication Methods 0.000 title claims abstract description 56
- 230000005540 biological transmission Effects 0.000 claims abstract description 75
- 238000011144 upstream manufacturing Methods 0.000 claims description 37
- 238000012546 transfer Methods 0.000 claims description 15
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a visible light communication method, a related device and a system. a beacon frame is sent to a mobile terminal so that a superframe can be initiated, wherein the superframe comprises an appointment phase and a data transmission cycle of an uncontested transmission phase; in the appointment phase, an appointment request sent by the mobile terminal is received; an appointment result is determined; after the appointment phase is over, a time slot of the uncontested transmission phase is allocated to the mobile terminal with the successful appointment according to the appointment result, and an allocating result is determined; the appointment result and the allocating result are fed back to the mobile terminal with the successful appointment, and thus the mobile terminal with the successful appointment can transmit uplink data grouping in the time slot of the uncontested transmission phase. By means of the method, the related device and the system, the operation that multiple users share a visible light network channel can be supported, the problem of mutual contest and mutual interference in the simultaneous using process of the channel by the users can be solved, and the efficiency of the visible light communication network can reach the optimum.
Description
Technical field
The present invention relates to indoor visible light communication technical field, in particular, relate to a kind of visible light communication method, relevant apparatus and system.
Background technology
Concerning indoor wireless communication network, in the time existing two or more users to carry out network insertion in network, user's terminal exists and vies each other simultaneously, the problem of access interference.The collision problem of terminal room access will cause the waste of channel, has a strong impact on the efficiency of network and user's communication experiences.
At present, indoor wireless communication network mainly adopts wireless radiofrequency power technology, and wireless radiofrequency power technology adopts the method for carrier sense mostly, be that terminal that user holds was first intercepted channel before access wireless channel, using channel to take to keep out of the way if listened to other-end, and then intercept, until carry out again network insertion when channel idle.
Compared with radio-frequency (RF) radio, visible light communication is because have without electromagnetic interference, radiationless, limited coverage area, energy savings, security and stability high, in indoor wireless communication, more and more applied, but, visible light communication, to adopt visible ray as the medium of indoor wireless communication, and visible ray has the feature of highly directive, two or more users are in the time carrying out network insertion, cannot listen to each other, therefore, in prior art, visible light communication cannot be by first intercepting, the mode of access is avoided the problem of the conflict of terminal room access again.
Summary of the invention
In view of this, the invention provides a kind of visible light communication method, relevant apparatus and system, to overcome the feature due to visible ray in prior art with highly directive, two or more users are in the time carrying out network insertion, cannot listen to each other, and then cause visible light communication cannot avoid by the mode of first intercepting, access again the problem of the conflict of terminal room access.
For achieving the above object, the invention provides following technical scheme:
A kind of visible light communication method, is applied to wireless access point AP, and described method comprises:
Send beacon frame to initiate a superframe to active terminal, described active terminal has referred to the terminals waiting for transmission such as upstream data packet, and described superframe is the data transfer cycle that comprises reservation period and uncontested transmission period;
In described reservation period, receive the reserve requests that described active terminal sends;
Determine reservation result;
After described reservation period finishes, be the time slot that the successful active terminal of described reservation is distributed described uncontested transmission period according to described reservation result, determine allocation result;
Described reservation result and described allocation result are fed back to the successful active terminal of described reservation, so that the successful active terminal of described reservation is transmitted described upstream data packet in the time slot of described uncontested transmission period;
After receiving the described upstream data packet of the successful active terminal transmission of reservation, give the successful active terminal of described reservation by the downlink data transmission corresponding with described upstream data packet.
Preferably, described method also comprises:
Count algorithm for estimating and predict the active terminal number of next superframe according to described reservation result and active terminal;
In beacon frame, define the reservation number of time slots that the reservation period of described next superframe comprises, the reservation number of time slots that the reservation period of described next superframe comprises equates with the active terminal number of described next superframe.
Preferably, described method also comprises:
According to described allocation result, in beacon frame, define the zero hour of next superframe.
Preferably, it is characterized in that, for the successful active terminal of different described reservations distributes the time slot of described uncontested transmission period not overlapping, and be no more than default higher limit.
A kind of visible light communication method, is applied to active terminal, and described active terminal has referred to the terminals waiting for transmission such as upstream data packet, and described method comprises:
Receive the beacon frame that wireless access point AP sends, described beacon frame is used for initiating a superframe, in described beacon frame, comprise the zero hour and the finish time of described superframe, described superframe is the data transfer cycle that comprises reservation period and uncontested transmission period, and described reservation period comprises multiple reservation time slots;
In the zero hour of described superframe, select at random a reservation time slot in described reservation period;
Send reserve requests at the reservation time slot of selecting to AP;
The reservation result that receives described AP feedback, described reservation result comprises the address of preengaging successful active terminal;
The allocation result that receives described AP feedback, described allocation result comprises the Schedule of described uncontested transmission period;
When in described reservation result, comprise self address time, in the time slot of the uncontested transmission period distributing at described AP, transmit described upstream data packet.
Preferably, the described reservation time slot selecting specifically comprises to AP transmission reserve requests:
When etc. upstream data packet waiting for transmission while being data packets, send reservation frame at the reservation time slot of selecting to AP;
When etc. upstream data packet waiting for transmission be short data when grouping, send described short data grouping at the reservation time slot of selecting to AP;
Wherein, described data packets is the packet that frame length is greater than described reservation frame, and described short data is grouped into the packet that frame length is less than or equal to described reservation frame.
Preferably, described method also comprises:
In the time not transferring upstream data packet in the time slot of the uncontested transmission period distributing at described AP, send mark so that described AP directly distributes the time slot of corresponding uncontested transmission period in next superframe for residue upstream data to described AP, described mark is used to indicate the length of residue upstream data packet.
A kind of wireless access point AP, for carrying out visible light communication method described above.
A kind of terminal, is characterized in that, for carrying out visible light communication method described above.
A kind of visible light communication system, comprises above-described wireless access point AP and above-described terminal.
Known via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of visible light communication method, relevant apparatus and system, send beacon frame to initiate a superframe to active terminal, superframe is the data transfer cycle that comprises reservation period and uncontested transmission period; In reservation period, receive the reserve requests that active terminal sends; Determine reservation result; After reservation period finishes, be the time slot that the successful active terminal of reservation is distributed uncontested transmission period according to reservation result, determine allocation result; Reservation result and allocation result are fed back to the successful active terminal of reservation, so that preengage the transmit ascending data grouping in the time slot of uncontested transmission period of successful active terminal.By adopting said method, relevant apparatus and system, can support multiple users to share visible ray network channel, solve multi-user while using channel simultaneously, vie each other, the problem of phase mutual interference, make the efficiency of visible light communication network reach optimum.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is the idiographic flow schematic diagram of a kind of disclosed visible light communication method of the embodiment of the present invention one;
Fig. 2 is the disclosed superframe structure schematic diagram of the embodiment of the present invention one;
Fig. 3 is the disclosed data frame format schematic diagram of the embodiment of the present invention one;
Fig. 4 is the disclosed beacon frame form of the embodiment of the present invention one schematic diagram;
Fig. 5 is the idiographic flow schematic diagram of the disclosed another kind of visible light communication method of the embodiment of the present invention two;
Fig. 6 is the disclosed reservation frame format of the embodiment of the present invention two schematic diagram.
Embodiment
For quote and know for the purpose of, the explanation of the technical term hereinafter using, write a Chinese character in simplified form or abridge and be summarized as follows:
VLC:Visible Light Communication, visible light communication;
FTP; File Transfer Protocol, file transfer protocol (FTP);
LOS:Line of Sight, sighting distance;
AP:Access Point, access point;
LED:Light Emitting Diode, light-emitting diode;
PD:Photo Diode, photodiode;
FOV:Field of View, the angle of visual field;
EKF:Extended Kalman Filter, EKF;
HTTP:Hyper Text Transfer Protocol, hypertext transfer protocol.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Term " first ", " second " etc. in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and needn't be used for describing specific order or precedence.The term that should be appreciated that such use suitably can exchange in situation, and this is only to describe the differentiation mode in embodiments of the invention, the object of same alike result being adopted in the time describing.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, so that the process that comprises a series of unit, method, system, product or equipment are not necessarily limited to those unit, but can comprise clearly do not list or for other intrinsic unit of these processes, method, product or equipment.
From background technology, in prior art, because visible ray has the feature of highly directive, two or more users are in the time carrying out network insertion, cannot listen to each other, therefore,, in prior art, visible light communication cannot be avoided by the mode of first intercepting, access again the conflict of terminal room access.The collision problem of terminal room access will cause the waste of channel, has a strong impact on the efficiency of network and user's communication experiences.
Therefore, the invention discloses a kind of visible light communication method, relevant apparatus and system, send beacon frame to initiate a superframe to active terminal, superframe is the data transfer cycle that comprises reservation period and uncontested transmission period; In reservation period, receive the reserve requests that active terminal sends; Determine reservation result; After reservation period finishes, be the time slot that the successful active terminal of reservation is distributed uncontested transmission period according to reservation result, determine allocation result; Reservation result and allocation result are fed back to the successful active terminal of reservation, so that preengage the transmit ascending data grouping in the time slot of uncontested transmission period of successful active terminal.By adopting said method, relevant apparatus and system, can support multiple users to share visible ray network channel, solve multi-user while using channel simultaneously, vie each other, the problem of phase mutual interference, make the efficiency of visible light communication network reach optimum.
Have about the idiographic flow of above-mentioned visible light communication method and the concrete structure of relevant apparatus and system and will be elaborated by following examples.
Embodiment mono-
Referring to accompanying drawing 1, is the idiographic flow schematic diagram of a kind of disclosed visible light communication method of the embodiment of the present invention one, and the method is applied to wireless access point AP, specifically comprises the steps:
S101: send beacon frame to initiate a superframe to active terminal.
Described active terminal has referred to the terminals waiting for transmission such as upstream data packet, comprises the zero hour and the finish time of described superframe in described beacon frame, and described superframe is the data transfer cycle that comprises reservation period and uncontested transmission period.
In the present embodiment, described visible light communication method realizes based on visible light communication system, and the network topology of above-mentioned visible light communication system is star-like, is made up of a wireless access point AP (Access Point) and several terminals.AP and terminal are all installed visible light signal reflector, visible light signal receiver and corresponding data processing unit.AP is connected with backbone network, can provide Network to indoor.The uplink downlink of this system is worked in the mode of full duplex, that is, in this system, the sending and receiving of signal can utilize Frequency Division Duplexing (FDD) or Space Division Duplex to carry out simultaneously, does not cause mutually interference.
A superframe can be called a transmission cycle of visible light communication system.As shown in Figure 2, in above-mentioned visible light communication system, the superframe of up link is divided into reservation period and uncontested transmission period two parts.Down link is responsible for the transmission of beacon frame and downstream data packet.Wherein, R is reservation period; R1, R2......Rm represent the reservation time slot in reservation period; U1, U2......Us represent that in uncontested transmission period, terminal is carried out transfer of data; Flag has indicated the upstream data packet length of transmission.
It should be noted that, upstream data packet and downstream data packet are all to adopt the form of Frame to transmit, and as shown in Figure 3, are the composition of data frame format, comprising: frame control, duration, BSSID, address, sequence control, frame main body and FCS.Wherein, the duration is set to the frame sequence duration that us is unit;
BSSID represents the address of AP, and address field represents terminal address;
Sequence control field is made up of 4bit burst number and 12bit sequence number, visible light communication equipment (AP or terminal) is each Frame appointed sequence number of its transmission, because internal home network up-downgoing business is corresponding relation, the sequence number of corresponding up-downgoing Frame is identical, the copy of the sequence number that in addition, each burst of a Frame contains a this Frame.
S102: in described reservation period, receive the reserve requests that described active terminal sends.
Reservation period is made up of the individual reservation time slot of m (t), and in the time that the superframe of up link starts, each active terminal is selected a reservation time slot at random.It should be noted that, in the time that two different active terminal are selected same reservation time slot, these two active terminal all cannot successfully be preengage in current superframe.
S103: determine reservation result.
If AP successfully receives the reservation packet of certain active terminal, this active terminal is preengage successfully, otherwise, preengage unsuccessfully.Described reservation result comprises the address of preengaging successful active terminal.
S104: after described reservation period finishes, be the time slot that the successful active terminal of described reservation is distributed described uncontested transmission period according to described reservation result, determine allocation result.
Described allocation result comprises the Schedule of described uncontested transmission period.It should be noted that, in the present embodiment, AP is that the different successful active terminal of described reservation distributes the time slot of described uncontested transmission period not overlapping, and is no more than default higher limit.
S105: described reservation result and described allocation result are fed back to the successful active terminal of described reservation, so that the successful active terminal of described reservation is transmitted described upstream data packet in the time slot of described uncontested transmission period.
S106: after receiving the described upstream data packet of the successful active terminal transmission of reservation, give the successful active terminal of described reservation by the downlink data transmission corresponding with described upstream data packet.
AP receives the upstream data packet of active terminal, transmits corresponding downstream data packet.The channel of down link beyond beacon frame all can carry out the transmission of downstream data packet.Give different active terminal downstream data packet transmission successively, according to the priority of downstream data packet request and downstream data packet to delay requirement etc.
The present embodiment discloses a kind of visible light communication method, is applied to AP, sends beacon frame to initiate a superframe to active terminal, and superframe is the data transfer cycle that comprises reservation period and uncontested transmission period; In reservation period, receive the reserve requests that active terminal sends; Determine reservation result; After reservation period finishes, be the time slot that the successful active terminal of reservation is distributed uncontested transmission period according to reservation result, determine allocation result; Reservation result and allocation result are fed back to the successful active terminal of reservation, so that preengage the transmit ascending data grouping in the time slot of uncontested transmission period of successful active terminal.By adopting said method, can support multiple users to share visible ray network channel, solve multi-user while using channel simultaneously, vie each other, the problem of phase mutual interference, make the efficiency of visible light communication network reach optimum.
On the basis of above-described embodiment, determining after reservation result, can count algorithm for estimating and predict according to reservation result and active terminal the active terminal number of next superframe.In beacon frame, define the reservation number of time slots that the reservation period of described next superframe comprises, the reservation number of time slots that the reservation period of described next superframe comprises equates with the active terminal number of described next superframe.Determining after allocation result, can in beacon frame, define according to allocation result the zero hour of next superframe.Uncontested transmission period duration is according to preengaging successful upstream data packet number and length dynamic change thereof in this superframe.
The present embodiment can adopt the method for EKF to predict the active terminal number of next superframe, specific as follows:
In a certain transmission cycle, the quantity of active terminal can directly affect success rate, access delay and the network throughput of terminal reservation access.According to free timeslot number in the estimation update cycle of statistics, can estimate the active terminal number of network in next update cycle.Represent active terminal number with N, m represents reservation periods number, and the probability of preengaging the time slot free time is:
This probability function monotone decreasing, invert and can obtain:
N＝g(P
idle)＝lnP
idle/ln(1-1/m)
Therefore, can be by estimating that the idle probability of reservation time slot in the update cycle obtains the estimated value of active terminal.
Particularly, doubly, in the update cycle, reservation number of time slots is T*m to the integer (T) that the update cycle of algorithm for estimating is transmission cycle, time slot free time, C
ibe designated as 1, time slot is busy, C
ibe designated as 0, in this update cycle, the measured value of idle probability is:
Order
represent the estimated value of t-1 moment active terminal number, P
t-1represent corresponding error variance.According to EKF (Extended Kalman Filter, EKF) principle, the active terminal estimated value in t moment can be expressed as:
Wherein,
kalman gain
Q is state-noise variance, observation noise variance
for observation susceptibility, error variance is estimated as P
t=(1-K
th
t) (P
t-1+ Q).
Because up link average throughput is:
Can be in the hope of m=N time, the maximum of on average handling up of up link.So, make the reservation timeslot number of next superframe equal the active terminal number of predicting,
make the maximum of handling up.
Described reservation result and described allocation result also can feed back to the successful active terminal of described reservation by the mode of beacon frame.Beacon frame comprises the terminal address of success reservation in this superframe and the Schedule (as table 1) of uncontested transmission period, and the reservation period length information of the synchronizing information of subsidiary network and next superframe.As shown in Figure 4, be the composition of beacon frame form, comprising: frame control, duration, BSSID, synchronizing information, channel assignment table, M (t+1) and FCS, wherein, BSSID is white light LEDs network ID; M (t+1) represents the reservation number of time slots of next superframe; FCS is frame check position.
Table 1
| Terminal address | Up channel mandate zero hour | Up channel reclaims the moment |
On the basis of the disclosed embodiment of the invention described above, the embodiment of the invention also discloses a kind of visible light communication method, be specifically elaborated by following examples.
Embodiment bis-
Referring to accompanying drawing 5, is the idiographic flow schematic diagram of a kind of disclosed visible light communication method of the embodiment of the present invention two, and the method is applied to active terminal, specifically comprises the steps:
S201: receive the beacon frame that wireless access point AP sends.
Described beacon frame is used for initiating a superframe, comprises the zero hour and the finish time of described superframe in described beacon frame, and described superframe is the data transfer cycle that comprises reservation period and uncontested transmission period, and described reservation period comprises multiple reservation time slots.
S202: in the zero hour of described superframe, select at random a reservation time slot in described reservation period.
S203: send reserve requests to AP at the reservation time slot of selecting.
The described reservation time slot selecting sends reserve requests to AP and specifically comprises:
When etc. upstream data packet waiting for transmission while being data packets, send reservation frame at the reservation time slot of selecting to AP; Reservation frame comprises the information such as packet length, number of retransmissions that source address, reservation send.Specifically as shown in Figure 6.
When etc. upstream data packet waiting for transmission be short data when grouping, send described short data grouping at the reservation time slot of selecting to AP;
Wherein, described data packets is the packet that frame length is greater than described reservation frame, and described short data is grouped into the packet that frame length is less than or equal to described reservation frame.
It should be noted that, the maximum retransmission of short data grouping is W,, the multipotency reservation of current superframe W time, if number of retransmissions exceedes W, abandons this short data and divides into groups.
S204: receive the reservation result of described AP feedback, described reservation result comprises the address of preengaging successful active terminal.
S205: receive the allocation result of described AP feedback, described allocation result comprises the Schedule of described uncontested transmission period.
S206: when in described reservation result, comprise self address time, in the time slot of the uncontested transmission period distributing at described AP, transmit described upstream data packet.
It should be noted that, in the time not transferring upstream data packet in the time slot of the uncontested transmission period distributing at described AP, send mark flag so that described AP directly distributes the time slot of corresponding uncontested transmission period in next superframe for residue upstream data to described AP, described mark flag is used to indicate the length of residue upstream data packet.
The present embodiment discloses a kind of visible light communication method, be applied to active terminal, by adopting said method, system realizes simple, to terminal physical layer without particular/special requirement, utilize existing equipment and technology to realize, and reduce by the mode of short packet reservation the loss that upstream data packet is brought, utilize the mode of the AP of network center scheduling, realize the optimal utilization of Internet resources, can also be according to the size of current transmission cycle traffic carrying capacity, the dynamic length of adjusting superframe, ensure making full use of of channel, up reservation period, descending beacon frame is expense maximum in network.
Based on above-described embodiment, the invention also discloses a kind of wireless access point AP, for carrying out the visible light communication method described in embodiment mono-.A kind of terminal, for carrying out the visible light communication method described in embodiment bis-.A kind of visible light communication system, comprises above-mentioned wireless access point AP and terminal.
In sum:
The invention discloses a kind of visible light communication method, relevant apparatus and system, send beacon frame to initiate a superframe to active terminal, superframe is the data transfer cycle that comprises reservation period and uncontested transmission period; In reservation period, receive the reserve requests that active terminal sends; Determine reservation result; After reservation period finishes, be the time slot that the successful active terminal of reservation is distributed uncontested transmission period according to reservation result, determine allocation result; Reservation result and allocation result are fed back to the successful active terminal of reservation, so that preengage the transmit ascending data grouping in the time slot of uncontested transmission period of successful active terminal.By adopting said method, relevant apparatus and system, can support multiple users to share visible ray network channel, solve multi-user while using channel simultaneously, vie each other, the problem of phase mutual interference, make the efficiency of visible light communication network reach optimum.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates referring to method part.
It should be noted that in addition, device embodiment described above is only schematic, the wherein said unit as separating component explanation can or can not be also physically to separate, the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of module wherein to realize the object of the present embodiment scheme.In addition, in device embodiment accompanying drawing provided by the invention, the annexation between module represents to have communication connection between them, specifically can be implemented as one or more communication bus or holding wire.Those of ordinary skill in the art, in the situation that not paying creative work, are appreciated that and implement.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential common hardware by software and realize, and can certainly comprise that application-specific integrated circuit (ASIC), dedicated cpu, private memory, special components and parts etc. realize by specialized hardware.Generally, all functions being completed by computer program can realize with corresponding hardware easily, and the particular hardware structure that is used for realizing same function can be also diversified, such as analog circuit, digital circuit or special circuit etc.But software program realization is better execution mode under more susceptible for the purpose of the present invention condition.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium can read, as the floppy disk of computer, USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc., comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in the present invention each embodiment.
In sum, above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record the various embodiments described above is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a visible light communication method, is characterized in that, is applied to wireless access point AP, and described method comprises:
Send beacon frame to initiate a superframe to active terminal, described active terminal has referred to the terminals waiting for transmission such as upstream data packet, and described superframe is the data transfer cycle that comprises reservation period and uncontested transmission period;
In described reservation period, receive the reserve requests that described active terminal sends;
Determine reservation result;
After described reservation period finishes, be the time slot that the successful active terminal of described reservation is distributed described uncontested transmission period according to described reservation result, determine allocation result;
Described reservation result and described allocation result are fed back to the successful active terminal of described reservation, so that the successful active terminal of described reservation is transmitted described upstream data packet in the time slot of described uncontested transmission period;
After receiving the described upstream data packet of the successful active terminal transmission of reservation, give the successful active terminal of described reservation by the downlink data transmission corresponding with described upstream data packet.
2. method according to claim 1, is characterized in that, described method also comprises:
Count algorithm for estimating and predict the active terminal number of next superframe according to described reservation result and active terminal;
In beacon frame, define the reservation number of time slots that the reservation period of described next superframe comprises, the reservation number of time slots that the reservation period of described next superframe comprises equates with the active terminal number of described next superframe.
3. method according to claim 1, is characterized in that, described method also comprises:
According to described allocation result, in beacon frame, define the zero hour of next superframe.
4. according to the method described in any one in claim 1～3, it is characterized in that, for the successful active terminal of different described reservations distributes the time slot of described uncontested transmission period not overlapping, and be no more than default higher limit.
5. a visible light communication method, is characterized in that, is applied to active terminal, and described active terminal has referred to the terminals waiting for transmission such as upstream data packet, and described method comprises:
Receive the beacon frame that wireless access point AP sends, described beacon frame is used for initiating a superframe, in described beacon frame, comprise the zero hour and the finish time of described superframe, described superframe is the data transfer cycle that comprises reservation period and uncontested transmission period, and described reservation period comprises multiple reservation time slots;
In the zero hour of described superframe, select at random a reservation time slot in described reservation period;
Send reserve requests at the reservation time slot of selecting to AP;
The reservation result that receives described AP feedback, described reservation result comprises the address of preengaging successful active terminal;
The allocation result that receives described AP feedback, described allocation result comprises the Schedule of described uncontested transmission period;
When in described reservation result, comprise self address time, in the time slot of the uncontested transmission period distributing at described AP, transmit described upstream data packet.
6. method according to claim 5, is characterized in that, the described reservation time slot selecting sends reserve requests to AP and specifically comprises:
When etc. upstream data packet waiting for transmission while being data packets, send reservation frame at the reservation time slot of selecting to AP;
When etc. upstream data packet waiting for transmission be short data when grouping, send described short data grouping at the reservation time slot of selecting to AP;
Wherein, described data packets is the packet that frame length is greater than described reservation frame, and described short data is grouped into the packet that frame length is less than or equal to described reservation frame.
7. method according to claim 5, is characterized in that, described method also comprises:
In the time not transferring upstream data packet in the time slot of the uncontested transmission period distributing at described AP, send mark so that described AP directly distributes the time slot of corresponding uncontested transmission period in next superframe for residue upstream data to described AP, described mark is used to indicate the length of residue upstream data packet.
8. a wireless access point AP, is characterized in that, for executing claims the visible light communication method described in 1～4.
9. a terminal, is characterized in that, for executing claims the visible light communication method described in 5～7.
10. a visible light communication system, is characterized in that, comprises wireless access point AP claimed in claim 8 and terminal claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410304752.7A CN104039019B (en) | 2014-06-30 | 2014-06-30 | A kind of visible light communication method, relevant apparatus and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410304752.7A CN104039019B (en) | 2014-06-30 | 2014-06-30 | A kind of visible light communication method, relevant apparatus and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104039019A true CN104039019A (en) | 2014-09-10 |
| CN104039019B CN104039019B (en) | 2019-03-12 |
Family
ID=51469564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410304752.7A Expired - Fee Related CN104039019B (en) | 2014-06-30 | 2014-06-30 | A kind of visible light communication method, relevant apparatus and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104039019B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018019079A1 (en) * | 2016-07-25 | 2018-02-01 | 中兴通讯股份有限公司 | Light fidelity wireless communication method, device and system, and storage medium |
| CN108650026A (en) * | 2018-05-08 | 2018-10-12 | 深圳清创新科技有限公司 | Visible light positioning device and system suitable for a wide range of visible light-seeking |
| CN110996384A (en) * | 2019-12-20 | 2020-04-10 | 中国人民解放军陆军工程大学 | Ultraviolet networking system and method based on synchronous communication mode |
| CN112821950A (en) * | 2021-01-06 | 2021-05-18 | 天津戎行集团有限公司 | Visible light communication networking method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101359361A (en) * | 2008-09-17 | 2009-02-04 | 湖南大学 | Data anticollision algorithm in RFID system |
| US20110069951A1 (en) * | 2009-09-19 | 2011-03-24 | Samsung Electronics Co., Ltd. | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
| US20110105134A1 (en) * | 2009-10-31 | 2011-05-05 | Samsung Electronics Co., Ltd. | Visible light communication method and apparatus |
| CN102412953A (en) * | 2011-11-03 | 2012-04-11 | 北京邮电大学 | Visible light local area network duplex communication method |
-
2014
- 2014-06-30 CN CN201410304752.7A patent/CN104039019B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101359361A (en) * | 2008-09-17 | 2009-02-04 | 湖南大学 | Data anticollision algorithm in RFID system |
| US20110069951A1 (en) * | 2009-09-19 | 2011-03-24 | Samsung Electronics Co., Ltd. | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
| US20110105134A1 (en) * | 2009-10-31 | 2011-05-05 | Samsung Electronics Co., Ltd. | Visible light communication method and apparatus |
| CN102412953A (en) * | 2011-11-03 | 2012-04-11 | 北京邮电大学 | Visible light local area network duplex communication method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018019079A1 (en) * | 2016-07-25 | 2018-02-01 | 中兴通讯股份有限公司 | Light fidelity wireless communication method, device and system, and storage medium |
| CN107659898A (en) * | 2016-07-25 | 2018-02-02 | 中兴通讯股份有限公司 | A kind of visible ray wireless communications method, equipment and system |
| CN108650026A (en) * | 2018-05-08 | 2018-10-12 | 深圳清创新科技有限公司 | Visible light positioning device and system suitable for a wide range of visible light-seeking |
| CN110996384A (en) * | 2019-12-20 | 2020-04-10 | 中国人民解放军陆军工程大学 | Ultraviolet networking system and method based on synchronous communication mode |
| CN110996384B (en) * | 2019-12-20 | 2022-01-04 | 中国人民解放军陆军工程大学 | Ultraviolet networking system and method based on synchronous communication mode |
| CN112821950A (en) * | 2021-01-06 | 2021-05-18 | 天津戎行集团有限公司 | Visible light communication networking method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104039019B (en) | 2019-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2019134380A (en) | METHODS AND SYSTEMS FOR RESOURCE PLANNING IN A TELECOMMUNICATION SYSTEM | |
| CN110166108B (en) | Low earth orbit satellite time division multiple access method | |
| CN104202740A (en) | Communication data transmitting method and device and user equipment | |
| WO2017036272A1 (en) | Resource selection method and device | |
| WO2017050296A1 (en) | Method and device for dispatching sub-bands | |
| EP2329676B1 (en) | Methods and apparatus for requesting and allocating resources in multiple transmission opportunities | |
| CN106165513B (en) | For providing the method and apparatus of multi-client access | |
| KR20200016985A (en) | Method and terminal device for repeated transmission | |
| CN101138208A (en) | Quality of service provisioning using periodic channel time allocation | |
| WO2017133418A1 (en) | Uplink transmission method and device | |
| CN105472532A (en) | Data transmission method and device | |
| CN104039019A (en) | Visible light communication method, related device and system | |
| US7940790B2 (en) | Multiple request intervals | |
| Han et al. | TARS: A traffic-adaptive receiver-synchronized MAC protocol for underwater sensor networks | |
| WO2017054777A1 (en) | Method and device for reducing network latency in radio communication | |
| US9571294B2 (en) | Acknowledgement mechanism | |
| US20160338080A1 (en) | Multi-user multiple-input-multiple-output scheduling | |
| CN112887074B (en) | Information sending method, device, terminal, access network equipment and system | |
| KR20190099290A (en) | PUCCH Resource Allocation for URLLC Support | |
| WO2017140202A1 (en) | Method and device for allocating continuous scheduling resource and transmitting data using the continuous scheduling resource | |
| CN107360593A (en) | Select the method and system of information transmission resources | |
| EP3466169B1 (en) | Method and apparatus for frequency selective scheduling in ofdma based wlans | |
| KR20170048544A (en) | Data transmission method and terminal | |
| CN108513359A (en) | A kind of interface-free resources distribution method and device | |
| CN101207541A (en) | Access point circuit for supporting multi-terminal devices and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190312 |