CN103945438A

CN103945438A - Wireless AP, communication system and communication method

Info

Publication number: CN103945438A
Application number: CN201410152489.4A
Authority: CN
Inventors: 李青; 邹艳芳; 邬江兴; 于宏毅; 张效义; 刘建辉; 郭伟; 张剑; 朱义君; 刘洛琨; 徐文艳
Original assignee: PLA Information Engineering University
Current assignee: PLA Information Engineering University
Priority date: 2014-04-16
Filing date: 2014-04-16
Publication date: 2014-07-23
Anticipated expiration: 2034-04-16
Also published as: CN103945438B

Abstract

The invention discloses a communication system and method. The system comprises an AP, N terminals and a data processing module, wherein the AP comprises a wireless receiving and sending module and a visible light receiving module, and the AP provides covering of two communication signals of wireless and visible light for an under-mine terminal through the two modules. According to the communication method, when the terminals receive request information of the AP, service data are sent to the AP by correspondingly adopting the wireless mode or the visible light communication mode or simultaneously adopting the wireless and visible communication modes according to light and electric channel states, subsequently, the AP adds corresponding identification information to the server data, then the service data are reported to the data processing module, and the data processing module performs corresponding service processing on the service data. Thus, when one communication link is disconnected or the signals are weak, the other link is adopted for achieving time transmission of the service data, and the problem that in the existing single-communication mode, due to the fact that the communication link is disconnected, it cannot be ensured that the service data are uploaded in time is solved.

Description

A kind of wireless access points AP, communication system and communication means

Technical field

The invention belongs to wireless communication technology field, relate in particular to a kind of AP(Access Point, wireless access points), communication system and communication means.

Background technology

Operational environment complexity under ore deposit, severe, gas density is higher easily causes danger, thereby need to understand at any time environmental aspect and worker information under ore deposit, to facilitate the follow-up work in every such as security and scheduling controlling under ore deposit of carrying out.Based on this, bearing communication system under the ore deposit of business data transmission function under ore deposit becomes the indispensable system of operation under ore deposit.

At present, under ore deposit, communication system all adopts single communication mode.For example, Henan Fei Guang telecom technology co., ltd has proposed a kind of based on 3G/4G(3rd/4th Generation, three/tetra-third-generation mobile communication technology) the mine communication system of network, this system utilizes 3G/4G communication module that communication base station is connected with communication terminal under ore deposit, and utilize Ethernet that communication base station is connected with communication system on ore deposit, the transmission of related data while realizing operation under ore deposit; The coal mine work area communication system based on visible light communication that China Mining University proposes, utilize the existing light conduits of working face as transmission medium, in working face, set up the Diode based on LED(Light-Emitting, light-emitting diode) the visible ray base station of illuminating lamp, miner wears the LED mine lamp with information transmit-receive function simultaneously, as mobile node, access the visible ray base station that signal is the strongest nearby, realize transfer of data.

In above-mentioned communication system, jitter when 3G/4G network is met landslide or thick wall, and optical link is met link while blocking and is easily disconnected, thereby existing communication system is owing to adopting single communication mode, and cause because of circumstance complication under ore deposit unstable networks, communication link while disconnection, can not ensure related service data in time, effectively upload.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of wireless access points AP, communication system and communication means, by the mode service data transmission of photoelectric-synergetic, solve in existing single communication mode and can not ensure because communication link disconnects the problem that business datum is uploaded in time.

For this reason, openly following technical scheme of the present invention:

A kind of wireless access points AP, described AP comprises radio receiving transmitting module and visible ray receiver module, wherein:

Described radio receiving transmitting module, for wireless system transceiving data;

Described visible ray receiver module, for receiving data with line-of-sight propagation;

The visible ray hot spot coverage of described visible ray receiver module is included in the wireless signal overlay area of described the first radio receiving transmitting module.

Above-mentioned AP, preferred, the first identification information that described AP is corresponding unique.

Above-mentioned AP, preferred, described visible ray receiver module comprises K photodiode PD, the second identification information corresponding to each described PD, described K is greater than 1 natural number.

A kind of communication system, comprises an AP as above and N terminal, and described terminal intercoms mutually with described AP, also comprises;

Data processing module, the business datum sending for receiving described AP, and according to the type of service under described business datum, described business datum is carried out to corresponding service processing.

Above-mentioned communication system, preferred, described type of service specifically comprises that positioning service, video passback business and transducer detect data passback business.

Above-mentioned communication system, preferred, described terminal comprises visible ray mobile terminal and environmental sensor terminal, the 3rd identification information that described visible ray mobile terminal is corresponding unique.

Above-mentioned communication system, preferred, described visible ray mobile terminal specifically comprises a Wi-Fi transceiver, the first VISIBLE LIGHT EMISSION device, camera and first environment transducer, wherein:

A described Wi-Fi transceiver, for communicating with wireless system and described AP, detects the transmission of business datum under data passback business to realize positioning service, video passback business and transducer;

Described the first visible ray sending module, for communicating with line-of-sight propagation and described AP, detects the transmission of business datum under data passback business to realize positioning service, video passback business and transducer;

The business datum of described positioning service comprises described the 3rd identification information, the business datum of described video passback business comprises the video data that described camera records, and the business datum that described transducer detects data passback business comprises the environmental data that described first environment transducer detects.

Above-mentioned communication system, preferred, a described Wi-Fi transceiver is the positional information in place and the frequency information in the described place of arrival for safeguarding that described visible ray mobile terminal often arrives also, and broadcasts described positional information and frequency information.

Above-mentioned communication system, preferred, described environmental sensor terminal specifically comprises the 2nd Wi-Fi transceiver, the second VISIBLE LIGHT EMISSION device and second environment transducer, wherein:

Described the 2nd Wi-Fi transceiver, for communicating with wireless system and described AP, detects the transmission of business datum under data passback business to realize described transducer;

Described the second visible ray sending module, for communicating with line-of-sight propagation and described AP, detects the transmission of business datum under data passback business to realize described transducer;

The business datum that described transducer detects data passback business also comprises the environmental data that described second environment transducer detects.

A kind of communication means, based on communication system as above, comprising:

If described terminal can receive the solicited message of AP, described terminal is in the time receiving the solicited message of AP, adopts the one in following transmission means to send business datum to described AP according to optical, electrical channel status is corresponding: wireless system, can be by optical communication mode, adopt the collaborative mode of radio and visible light communication simultaneously;

Described AP adds respective identification information according to the transmission means of described business datum to described business datum, and the business datum of adding after identification information is sent to described data processing module;

Described data processing module carries out corresponding analysis and Business Processing according to the type of service under the business datum after described interpolation identification information to described business datum, obtains service processing result.

Above-mentioned communication means, preferably, described terminal is in the time receiving the solicited message of AP, adopt the one in following transmission means to send business datum to described AP according to optical, electrical channel status is corresponding: wireless system, line-of-sight propagation, to adopt the collaborative mode of radio and visible light communication simultaneously, specifically comprise:

If optical channel signal intensity is greater than predetermined threshold value, described terminal adopts line-of-sight propagation to send described business datum;

If radio channel signal strength signal intensity is greater than predetermined threshold value, described terminal adopts wireless system to send described business datum;

If optical channel and radio channel signal strength signal intensity are invalid, or optical, electrical channel signal strength is greater than predetermined threshold value simultaneously, and described terminal adopts wireless system and line-of-sight propagation is collaborative sends described business datum simultaneously.

Above-mentioned communication means, preferred, described AP adds respective identification information according to the transmission means of described business datum to described business datum, and the business datum of adding after identification information is sent to described data processing module, specifically comprises:

If described business datum is transmitted by wireless system, radio receiving transmitting module adds described the first identification information in described business datum, and the business datum of adding after the first identification information is sent to described data processing module;

If described business datum is transmitted by line-of-sight propagation, the PD that receives described business datum adds the second identification information of described PD in described business datum, and the business datum of having added the second identification information is sent to described data processing module;

If described business datum repeats transmission by wireless system and line-of-sight propagation, the PD that receives described business datum adds the second identification information of described PD in described business datum, and the business datum of having added the second identification information is sent to described data processing module.

Above-mentioned communication means, preferred, described data processing module according to the type of service under the business datum after described interpolation identification information the business datum after to described interpolation identification information carry out corresponding analysis and Business Processing, specifically comprise;

If the type of service of adding under the business datum after the first identification information is positioning service, described data processing module positions corresponding terminal according to the 3rd identification information and the first identification information in described business datum; If the type of service of adding under the business datum after the second identification information is positioning service, described data processing module positions corresponding terminal according to the 3rd identification information and the second identification information in described business datum;

If the type of service under the business datum after interpolation identification information is video passback business, described data processing module carries out video traffic processing to described business datum;

Detect data passback business if the type of service under the business datum after interpolation identification information is transducer, described data processing module carries out sensing data Business Processing to described business datum.

Above-mentioned communication means, preferred, also comprise:

If described terminal can not receive the solicited message of AP, the maximum probability criterion that described terminal arrives AP based on data is utilized the opportunistic network building between terminal, from described opportunistic network, select the optimum relay route taking other-end as via node, and send and carry the business datum of adding locating information to described AP by described optimum relay route, wherein, the business datum that described additional locating information comprises described terminal is in the forwarding time of relay route and the little group number of described terminal place group;

Described AP foundation is added respective identification information to the receive mode of described business datum of carrying additional locating information to described business datum, and the described business datum of adding after identification information is sent to described data processing module;

Described data processing module according to add after identification information described in carry the type of service described in the business datum of additional locating information, described business datum is carried out to corresponding analysis and Business Processing, obtain service processing result.

Above-mentioned communication means, preferably, described AP foundation is added respective identification information to the receive mode of described business datum of carrying additional locating information to described business datum, and the described business datum of adding after identification information is sent to described data processing module, specifically comprises:

If carry the business datum of additional locating information described in described AP receives by wireless system, the radio receiving transmitting module of AP adds described the first identification information in described business datum, and the described business datum of adding after the first identification information is sent to described data processing module;

If carry the business datum of additional locating information described in described AP receives by visible ray mode, the PD that receives described business datum in AP adds the second identification information of described PD in described business datum, and the described business datum of having added the second identification information is sent to described data processing module;

If described AP repeats to receive the business datum of carrying additional locating information by wireless system and line-of-sight propagation, the PD that receives described business datum in AP adds the second identification information of described PD in institute's business datum, and the described business datum of having added the second identification information is sent to described data processing module.

Above-mentioned communication means, preferred, described data processing module according to add after identification information described in carry the type of service described in the business datum of additional locating information, described business datum is carried out to corresponding analysis and Business Processing, specifically comprise:

If carrying the affiliated type of service of business datum of additional locating information described in after interpolation the first identification information is positioning service, described data processing module positioned corresponding terminal according to the first identification information, the 3rd identification information, little group number and forwarding time in described business datum; If carrying the affiliated type of service of business datum of additional locating information described in after interpolation the second identification information is positioning service, described data processing module positioned corresponding terminal according to the second identification information, the 3rd identification information, little group number and forwarding time in described business datum;

If the type of service under the business datum of carrying additional locating information after interpolation identification information is video passback business, described data processing module carries out video traffic processing to described business datum;

Detect data passback business if the type of service under the business datum of carrying additional locating information after interpolation identification information is transducer, described data processing module carries out sensing data Business Processing to described business datum.

The communication system that the embodiment of the present invention provides comprises AP, a N terminal and data processing module, wherein, AP comprises radio receiving transmitting module and visible ray receiver module, and above-mentioned two kinds of modules that AP can comprise by it provide the covering of radio and two kinds of signals of communication of visible ray to terminal under ore deposit.In communication means based on this communication system, terminal is in the time receiving the solicited message of AP, adopt wireless system or visible ray mode or adopt radio and mode that visible ray is collaborative sends business datum to described AP simultaneously according to optical, electrical channel status is corresponding, follow-up AP adds after respective identification information the terminal traffic data that receive, reported to data processing module, realize business datum is carried out to corresponding service processing by data processing module.Thereby, utilize communication means of the present invention can realize therein when a kind of communication link disconnects or signal is weak, adopt another kind of communication link to realize the timely transmission of business datum, for example, in the time that optical link chance is blocked disconnection, can adopt wireless system to transmit data in radio channel, visible the present invention has been solved in existing single communication mode and can not have been ensured because communication link disconnects the problem that business datum is uploaded in time by the mode of photoelectric-synergetic.

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 some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structural representation of the disclosed wireless access points AP of the embodiment of the present invention one;

Fig. 2 is the structural representation of the embodiment of the present invention two disclosed communication systems;

Fig. 3 is the structural representation of the disclosed visible ray mobile terminal of the embodiment of the present invention two;

Fig. 4 is the structural representation of the disclosed environmental sensor terminal of the embodiment of the present invention two;

Fig. 5 is the occupancy schematic diagram that the disclosed photoelectricity channel of the embodiment of the present invention two has been worked in coordination with two channels while communication;

Fig. 6 is the disclosed data frame structure schematic diagram of the embodiment of the present invention two;

Fig. 7 is a kind of flow chart of the embodiment of the present invention four disclosed communication meanss;

Fig. 8 is the disclosed centralized coordinating communication process of the embodiment of the present invention four;

Fig. 9 is the communication process based on protocol stack between the disclosed terminal of the embodiment of the present invention four and AP;

Figure 10 is the another kind of flow chart of the embodiment of the present invention five disclosed communication meanss;

Figure 11 is the Principle of Communication figure of the disclosed terminal of the embodiment of the present invention five based on opportunistic network;

Figure 12 is the laying situation schematic diagram of disclosed certain the Mine Integrated communication system of the embodiment of the present invention six;

Figure 13 is the channel occupancy schematic diagram that carries out channel access between the disclosed terminal of the embodiment of the present invention six and AP and send data to AP;

Figure 14 is the structural representation of the embodiment of the present invention six disclosed aggregate frame;

Figure 15 is the structural representation of six disclosed acknowledgement frames of the embodiment of the present invention.

Embodiment

For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is 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.

The present embodiment discloses a kind of wireless access points AP, communication system and communication means, for example, for realizing the comparatively data communication function of complex scene (under ore deposit) of environment.Below will describe in detail to the present invention by each embodiment.

Embodiment mono-

The embodiment of the present invention one discloses a kind of wireless access points AP, and the first identification information that this AP is corresponding unique, refers to Fig. 1, and this AP comprises radio receiving transmitting module 101 and visible ray receiver module 102.

Radio receiving transmitting module 101, for wireless system transceiving data.

Wherein, the function of radio receiving transmitting module 101 specifically can adopt Wi-Fi(Wireless Fidelity) transceiver module or wireless base station realize its function.

Visible ray receiver module 102, for receiving data with line-of-sight propagation.

This visible ray receiver module 102 comprises K PD(Photo Diode, photodiode), the second identification information that each PD is corresponding unique, K is greater than 1 natural number.

For follow-up miscellaneous service processing is provided support, the present embodiment is that AP distributes unique network address, i.e. SSID(Service Set Identifier, service set) number, for each PD distributes unique short address number.

The visible ray hot spot coverage of visible ray receiver module 102 is included in the wireless signal overlay area of the first radio receiving transmitting module 101.

The wireless base station that the AP of the present embodiment comprises by it and multiple PD realize radio and can be by the covering of two kinds of signals of communication of light to corresponding terminal under ore deposit, and then for to provide support by the mode service data transmission of photoelectric-synergetic.

Embodiment bis-

The present embodiment two discloses a kind of communication system, and as shown in Figure 2, this communication system comprises the disclosed AP100 of embodiment mono-and N terminal 200, and described terminal 200 intercoms mutually with described AP100, also comprises data processing module 300.

The transfer of data demand of the integrated services such as communication system of the present invention can support staff's positioning service, video passback business, Sensor monitoring data passback business and alert service.

Wherein, terminal 200 comprises visible ray mobile terminal and environmental sensor terminal, the 3rd identification information that described visible ray mobile terminal is corresponding unique.。

As shown in Figure 3, visible ray mobile terminal comprises a Wi-Fi transceiver 301, the first VISIBLE LIGHT EMISSION device 302, camera 303 and first environment transducer 304.Wherein, a Wi-Fi transceiver 301, for communicating with wireless system and described AP, detects the transmission of business datum under data passback business to realize positioning service, video passback business and transducer; The first visible ray sending module 302, for communicating with line-of-sight propagation and described AP, is realized the transmission of business datum under positioning service, video passback business and transducer detection data passback business; The business datum of described positioning service comprises the 3rd identification information of visible ray mobile terminal, the business datum of described video passback business comprises the video data that camera 303 records, and the business datum that described transducer detects data passback business comprises the environmental data that first environment transducer 304 detects.

In the present embodiment, using the miner who carries LED lamp ore deposit cap as visible ray mobile terminal, between the ore deposit cap that miner carries by it and AP, carry out radio communication or visible light communication and realize the business data transmission of above-mentioned various types of traffic, to facilitate administrative staff on ore deposit from various dimensions, miner's working condition to be understood at any time.

For convenience of miner personnel are carried out to positioning service, realize miner is positioned, the present embodiment is that each miner distributes unique ID(IDentity, identify label number).

Particularly, light emitting devices can be integrated in the LED head lamp power supply box on the cap of miner ore deposit, using head lamp as visible light emitter, and Wi-Fi transceiver and camera are placed in to head lamp, integrated required various kinds of sensors, such as temperature sensor, humidity sensor and firedamp sensor etc. on the cap of ore deposit simultaneously.Thereby the ore deposit cap that miner can carry by it is realized and in the course of work, video data, all kinds of environmental data being gathered under ore deposit, the such as temperature in collecting work region, humidity, gas situation etc., and can be by carrying out radio between ore deposit cap and AP or visible light communication is realized uploading of image data and self ID, facilitate administrative staff on ore deposit at any time miner personnel to be positioned and understand the operational environments such as the temperature, humidity, gas situation of miner personnel working region to facilitate the follow-up work such as security of carrying out.

Refer to Fig. 4, described environmental sensor terminal specifically comprises the 2nd Wi-Fi transceiver 401, the second VISIBLE LIGHT EMISSION device 402 and second environment transducer 403.Wherein, the 2nd Wi-Fi transceiver 401, for communicating with wireless system and described AP, detects the transmission of business datum under data passback business to realize described transducer; The second visible ray sending module 402, for communicating with line-of-sight propagation and described AP, detects the transmission of business datum under data passback business to realize described transducer; The business datum that described transducer detects data passback business also comprises the environmental data that second environment transducer 403 detects.

Wherein, environmental sensor terminal is the fixed terminal that is placed in fixed location under ore deposit, it is integrated all kinds of required environmental sensors such as temperature sensor, humidity sensor and firedamp sensor, for the environmental data of fixed location under ore deposit is gathered, when concrete enforcement, can be by lay the environmental sensor terminal of sufficient density under ore deposit, realize comparatively comprehensively gathering ore deposit lower area environmental data.Environmental sensor terminal has the transmitting capacity of Wi-Fi ability and visible ray simultaneously, can by and AP between carry out radio or visible light communication and realize gathered environmental data is reported.

The working region environmental data that environmental sensor in visible ray mobile terminal is intended to the miner personnel to moving, may change at any time work-yard gathers, and environmental sensor terminal is intended to fixed area under ore deposit to carry out environmental data collecting, both combine and can make administrative staff understand more comprehensively full ore deposit situation.

The feature that the present embodiment moves at any time for miner personnel, carries out positioning service to visible ray mobile terminal.The business of therefore, carrying out for visible ray mobile terminal has positioning service, video passback business and Sensor monitoring data passback business; And only carry out video passback business and Sensor monitoring data passback business for environmental sensor terminal.

Data processing module 300, the business datum sending for receiving described AP, and according to the type of service under described business datum, business datum is carried out to respective handling.For example, locator data is analyzed to realize miner personnel are positioned, the environmental data that transducer is surveyed is analyzed, and obtains environmental aspect under ore deposit etc.

Wherein, data processing module 300 specifically can adopt disposable plates, server etc., realizes the processing capacity to different business data.

Utilize system of the present invention, for taking Xia Zhu tunnel, ore deposit as the good scene of the lighting installation of representative, can adopt the photoelectricity hybrid network at center, adopt AP based on pre-establishing You center agreement, the terminal that enters its photoelectricity coverage to be carried out to channel access control as central coordinator, utilize the collaborative mode of visible ray and Wi-Fi to complete the transmission of all kinds of business datums under ore deposit, while guaranteeing therein a kind of channel (as optical channel) poor signal, can adopt another kind of channel proper communication, there is central site network can realize the real-time passback of data, service delay is little, network efficiency is high.

Have the central controlled work of the photoelectricity hybrid network at center (AP) to be mainly divided into descending and up two processes:

Communicating by letter of descending that initiated by AP and terminal room completes in radio channel, adopts complete Wi-Fi agreement.Specifically can be according to the version of adopted Wi-Fi, corresponding distributed coordination function or the centralized coordination function of adopting communicates, and also distributed coordination and centralized coordination function can be combined and communicates.

Communicating by letter between up that initiated by terminal and AP, adopts complete Wi-Fi agreement, has been worked in coordination with by photoelectricity channel.Specifically in the time that data send, need determine only adopt radio channel (when optical channel poor quality) according to channel status, only adopt optical channel (when radio channel poor quality), adopt photoelectricity channel to send (without channel quality reporting time) simultaneously.Refer to Fig. 5, Fig. 5 is the occupancy that photoelectricity channel completes two channels while communication jointly.

Wherein, the foundation of differentiating as channel status using channel quality height, channel quality mainly refers to the intensity of letter channel receiving signal.In the present embodiment, in visible ray mobile terminal and PD receiver, channel quality detection module is installed respectively, and sets threshold value threshold, be greater than or be less than threshold and judge the height of channel quality by detecting received signal strength RSI.Particularly, when can receiving downlink business by terminal, radio channel quality measures, optical channel quality can be at terminal uploading data, while receiving data by PD, channel quality is detected, testing result broadcasts to terminal by AP by downlink business, to facilitate terminal to select corresponding communication channel uploading data.

Utilize system of the present invention to complete in the process of data communication, the transmission of all kinds of business datums all adopts the form of Frame, Various types of data frame adopts the existing frame structure of Wi-Fi, and as shown in Figure 6, Frame comprises frame control, Termination ID, FCS(Frame Check Sequence) etc. field.

In the communication system of the present embodiment, between terminal and AP, can adopt radio and two kinds of communication modes of light can be carried out to transfer of data, can not ensure because communication link disconnects the problem that business datum is uploaded in time thereby can overcome in existing single communication mode.

Embodiment tri-

The embodiment of the present invention three is supplemented the communication system of embodiment bis-, particularly, in the present embodiment, the Wi-Fi transceiver that visible ray mobile terminal comprises is the positional information in place and the frequency information in the described place of arrival for safeguarding that this visible ray mobile terminal often arrives also, and broadcasts described positional information and frequency information.

In downside tunnel, ore deposit, under the scenes such as face, there is no the electric consumption on lighting line of force or the limited power for illumination line of force only, and under this scene, environment is severe, tunnel unevenness, time have the situation such as landslide to occur, cause wired laying very inconvenient, Wi-Fi base station is also difficult for installing, therefore under this scene visible ray mobile terminal cannot directly access center AP realize its business datum is reported, for addressing this problem, in the present embodiment, visible ray mobile terminal is set up above-mentioned functions, adopt the distributed network architecture of opportunistic network in the scene that is difficult for laying center AP, it is the new frequency information with arriving described place in position that each visible ray mobile terminal is safeguarded own often place of arrival within a certain period of time, and property information cycle of maintenance is broadcasted away, there is the terminal of communication requirement to receive after the broadcast of each adjacent end, therefrom select the terminal that arrives the frequency maximum that has photoelectricity Mixed Zone, center to carry out data retransmission as via node, the forwarding of data specifically utilizes the wireless Wi-Fi link of terminal room to complete, the packet forwarding is containing video, the data such as environmental monitoring value, ensure that data arrive the maximum probability of center AP.

Distributed network can be realized the hysteresis passback of the data that originally cannot return, for the concrete scene under ore deposit, the present invention adopts has the photoelectricity hybrid network at center and the distributed network based on opportunistic network jointly to realize all standing of signal of communication under ore deposit, two kinds of networks are complementary relationship, there is the switching of center and opportunistic network automatically to complete by agreement, terminal is without carrying out any manual switching, thereby, the invention solves the problem of data blind area than prior art.

Embodiment tetra-

The present embodiment four discloses a kind of communication means, based on the disclosed communication system of above embodiment.In the present embodiment, this communication means specifically adopts radio work frequency range (MX2BCM4330 chip) and the visible ray channel of 5GHz to complete required communication work.

Refer to Fig. 7, above-mentioned communication means comprises the steps:

S1: if described terminal can receive the solicited message of AP, described terminal is in the time receiving the solicited message of AP, adopts the one in following transmission means to send business datum to described AP according to optical, electrical channel status is corresponding: wireless system, line-of-sight propagation, adopt the collaborative mode of radio and visible light communication simultaneously.

Particularly, as shown in Figure 8, AP by Wi-Fi channel (radio channel) with the form broadcasted the each terminal broadcast beacon frame Beacon to its signal coverage areas, whether have data to send with inquiry terminal.

Miner personnel as visible ray mobile terminal enter after operational environment, the LED lamp that it carries starts illumination, transducer and camera gather surrounding environment parameter, the Wi-Fi R-T unit that terminal comprises simultaneously carries out radio channel monitoring, if it can listen to the solicited message that AP sends, particularly, Wi-Fi R-T unit listens to the beacon frame Beacon that AP sends in a super frame period, represent that this terminal is in having the photoelectricity hybrid network at center, can adopt center agreement and AP to communicate, Wi-Fi channel and optical channel can be worked in coordination with use.

Still refer to Fig. 8, each terminal is receiving after the beacon frame of AP, resolves beacon frame, obtains the type of service that allows transmission, and sends self ID competition communication authority to AP; Afterwards, AP sends poll frame poll to the terminal in coverage successively according to the ID queue that receives, and each terminal node sends its data frame data successively receiving after this poll frame.Particularly, the channel quality of terminal inquiry broadcast, if optical channel signal intensity is greater than threshold value, sends total data by visible ray channel; If radio channel signal strength signal intensity is greater than predetermined threshold value, send data by radio channel; If optical channel and radio channel signal strength signal intensity are invalid, or optical, electrical channel signal strength is greater than predetermined threshold value simultaneously, sends data by optical channel and radio channel simultaneously.

S2: described AP adds respective identification information according to the transmission means of described business datum to described business datum respectively, and the business datum of adding after identification information is sent to described data processing module.

This step S2 specifically comprises:

Particularly, receive after the Frame of terminal transmission, the data of receiving for radio channel, AP is replied and confirms 1 to the terminal that sends these data by radio channel, in the Frame receiving, add No. SSID of AP by wireless base station simultaneously, and the Frame that has added No. SSID is uploaded to data processing module; The data of receiving for optical channel, AP is replied and confirms 2 to terminal by radio channel, and the PD that simultaneously receives this Frame adds PD short address in Frame, and the Frame that has added PD short address is uploaded to data processing module; If two channels are all received Frame, AP replys and confirms 12 in radio channel, whether the data message of simultaneously comparing two paths has repetition, for there is situation about repeating in two path transmission data, for repeating data frame, on this Frame, add corresponding PD short address, and the Frame adding behind short address is uploaded to data processing module.

Each PD and wireless base station adopt data wire to be connected to data processing module (for example disposable plates), and by time division multiplexing mode shared channel.

S3: described data processing module carries out corresponding analysis and Business Processing according to the type of service under the business datum after described interpolation identification information to described business datum, obtains service processing result.

Above-mentioned steps S3 specifically comprises:

Particularly, in the present embodiment, the incidentally mode of transmission of positioning service employing business transmission, by the Frame of video data or the required locating information (Termination ID) of the Frame carried terminal positioning service of sensor environment data.

If the Frame that data processing module receives is the data that the wireless base station in AP is uploaded, data processing module, according to No. SSID that carries in Frame and Termination ID, positions terminal; If Frame is the data that PD uploads, data processing module positions terminal according to the PD short address and the Termination ID that carry in Frame.

In addition, if data are video data in Frame, data processing module to video data process, dynamic duty situation, the working trajectory etc. of analysing terminal, if data are environmental data in Frame, data processing module is according to the surrounding enviroment of environmental data analysing terminal.Particularly, data processing module can carry out various processing to the data of its reception according to the processing logic setting in advance, carries out every follow-up work to facilitate, for example, carry out security, scheduling controlling etc.

The method of the present embodiment is corresponding with the disclosed communication system of embodiment bis-, and only to terminal, the communication process in the time having center photoelectricity hybrid network describes the present embodiment.

Above taking visible ray terminal as example, central controlled communication process to photoelectricity hybrid network is described in detail, the data upload process of environmental sensor terminal and visible ray mobile terminal is similar, both differences are only to have carried out positioning service for visible ray mobile terminal, and environmental sensor terminal is owing to being laid in fixed position under ore deposit, without positioning.

It should be noted that, when concrete enforcement, still need for each fixing environmental sensor terminal distribution corresponding ID, and in advance that sensor ID is corresponding one by one with the position at its place, thereby in the time that disposable plates receives the data of sensor terminal, environment under ore deposit, to data analysis, is understood in comprehensive sensor terminal position.

Apply time of the present invention, can pre-establish terminal protocol stack and AP protocol stack, realize the data communication between terminal and AP based on protocol stack, refer to Fig. 9, Fig. 9 is the communication process based on protocol stack between terminal and AP.Video information in terminal under the environmental parameter of transducer collection and camera record is broken down into packet after treatment, in network layer, form Frame with packet+network address+header form, afterwards, data link layer scrambled data frame, be MAC(Media Access Control by network address translation, media are got involved key-course) address, physical layer is physical layer signal by Data Modulation and is sent to AP through wireless transmitter module and VISIBLE LIGHT EMISSION module, AP obtains with contrary step the data message that terminal transmits, the wherein network layer of AP operation fixed route, data message unification is sent to certain fixing disposable plates, by disposable plates, data message is carried out to subsequent treatment, for example, according to the Termination ID in fetched data information, PD short address (or AP network address) obtains the positional information of terminal etc.

To sum up, the communication system that the embodiment of the present invention provides comprises AP, a N terminal and data processing module, wherein, AP comprises radio receiving transmitting module and visible ray receiver module, and above-mentioned two kinds of modules that AP can comprise by it provide the covering of radio and two kinds of signals of communication of visible ray to terminal under ore deposit.In communication means based on this communication system, terminal is in the time receiving the solicited message of AP, adopt wireless system or visible ray mode or adopt radio and mode that visible ray is collaborative sends business datum to described AP simultaneously according to optical, electrical channel status is corresponding, follow-up AP adds after respective identification information the terminal traffic data that receive, reported to data processing module, realize business datum is carried out to corresponding service processing by data processing module.Thereby, utilize communication means of the present invention can realize therein when a kind of communication link disconnects or signal is weak, adopt another kind of communication link to realize the timely transmission of business datum, for example, in the time that optical link chance is blocked disconnection, can adopt wireless system to transmit data in radio channel, visible the present invention has been solved in existing single communication mode and can not have been ensured because communication link disconnects the problem that business datum is uploaded in time by the mode of photoelectric-synergetic.

Embodiment five

The communication means of embodiment tetra-can be applicable to the scene of the photoelectricity hybrid network of controlling at the employing center such as Ji Fen tunnel, Xia Zhu tunnel, ore deposit, access network under the coordination of terminal Ke center AP, and by completing the transmission of its business datum with AP direct communication.

The present embodiment five expands the communication means of embodiment tetra-, for the scene that is difficult for laying center AP under the ore deposits such as side tunnel, face, can adopt the opportunistic network building between terminal to carry out the forwarding of data, when enter the porch of face with point tunnel as the terminal of via node,, while entering in the overlay area of photoelectricity hybrid network of center AP, utilize photoelectricity hybrid network that center controls by the data cached AP of being forwarded to.

Refer to Figure 10, the communication means after expansion also comprises

S4: if described terminal can not receive the solicited message of AP, the maximum probability criterion that described terminal arrives AP based on data is utilized the opportunistic network building between terminal, from described opportunistic network, select the optimum relay route taking other-end as via node, and send and carry the business datum of adding locating information to described AP by described optimum relay route, wherein, the business datum that described subsidiary locating information comprises described terminal is in the forwarding time of relay route and the little group number of described terminal place group.

First, because the environment such as side tunnel, face do not possess center AP, for realizing the orientation problem of this kind of terminal under environment, the present embodiment is divided into different groups by miner by different work posts such as electric pincers worker, fireman, monitoring work, gas detection works in advance, and be respectively each little group #, in group, each member can safeguard the positional information and the frequency information that arrives described place of own often place of arrival within a certain period of time, and property information cycle that each member safeguards oneself is broadcasted away.Follow-up can be using the foundation of the little group number at terminal place and the shared time terminal positioning in opportunistic network of terminal forwarding data.

In the time of the extremely severe region of the environmental condition such as miner personnel approaching side tunnel, face as visible ray mobile terminal, this terminal can not receive the beacon frame of center AP broadcast, now, there is the terminal of data upload demand to adopt the photoelectricity hybrid network access mechanism based on opportunistic network.Particularly, the opportunistic network based on prediction forwards routing mechanism.Each terminal node maintains a prediction probability meeting with destination node (center control nodes), specifically can predict this probability by node movement locus, utilizes the mobility model of node to estimate the probability meeting, and selects optimum node for data forwarding.

As shown in figure 11, wherein, indicate the terminal of data upload demand with source node, via node represents the terminal on data forwarding paths.Have after near the broadcast of source node node receiving of data upload demand, therefrom select optimum node, select the node that arrives the photoelectricity Mixed Zone frequency maximum that has center to carry out data retransmission as via node, as shown in figure 11, first source node selects via node 1 as first optimum node, and realize data transmission of 1 from source node to via node by handshake method, the data of via node 1 buffer memory source node simultaneously, afterwards, via node 1 adopts in the same way transfer of data and to be buffered in second optimum node be via node 2, if via node 2 can be realized the connection of same wireless base station and PD receiver, by via node 2, the source node data of buffer memory is uploaded to center AP by photoelectricity hybrid network, thereby having realized face is connected with the data between the AP of center, ensure that face place terminal data arrives the maximum probability of Centroid.

Particularly, via node 2 can select suitable communication mode to upload the data of source node to AP according to the quality of photoelectricity channel.

The packet that terminal forwards, containing data such as video or environment detecting/monitoring values, comprises Termination ID number, little group number and the data retransmission time of source node simultaneously.

S5: described AP foundation is added respective identification information to the receive mode of described business datum of carrying additional locating information to described business datum, and the described business datum of adding after identification information is sent to described data processing module.

If carry the business datum of additional locating information described in described AP receives by wireless system, the radio receiving transmitting module of AP adds the first identification information in described business datum, and the described business datum of adding after the first identification information is sent to described data processing module;

If carry the business datum of additional locating information described in described AP receives by wireless system, the PD that receives described business datum in AP adds the second identification information of described PD in described business datum, and the described business datum of having added after the second identification information is sent to described data processing module;

If described AP repeats to receive the business datum of carrying additional locating information by wireless system and line-of-sight propagation, the PD that receives described business datum in AP adds the second identification information of described PD in described business datum, and the business datum of having added the second identification information is sent to described data processing module.

S6: described data processing module according to add after identification information described in carry the type of service described in the business datum of additional locating information, described business datum is carried out to corresponding analysis and Business Processing, obtain service processing result.

Wherein, the data of uploading for wireless base station, back end processing module is complied with according to the SSID in received data frame, Termination ID, the little group number in terminal place and the data data retransmission time positions terminal; The data of uploading for PD, back end processing module according to the PD short address in received data frame, Termination ID, the little group number in terminal place according to and the data data retransmission time terminal is positioned, thereby solved the orientation problem of terminal in the scene of the difficult laying center AP such as face, side tunnel.

Data (video data, the environmental data) processing procedure of other types of service, with identical to the processing of terminal corresponding service data in main tunnel, no longer describes in detail.

The present embodiment adopts the photoelectricity hybrid network access mechanism based on opportunistic network in face, side tunnel, the photoelectricity hybrid network at network Dui You center of improving the occasion supplements, two kinds of network forms merge to realize mutually carries out all standing to communication network under ore deposit, has solved the problem of data communication blind area.

Embodiment six

In real world applications scene, can realize according to actual demand all standing of communication network by laying the AP of sufficient density, as shown in figure 12, Figure 12 is the laying situation schematic diagram based on certain Mine Integrated communication system of the present invention.

Next, the present embodiment six discloses a practical application scene of the present invention.

In this scene, Xia Zhu tunnel, ore deposit taking 70m as unit is divided into multiple communities, the communication work of this community is responsible for by a network element in each community, and each network element is laid an AP, and this AP receives PD by a wireless base station and 10 visible rays and forms (being that average 7m lays a PD receiver).

Terminal enters behind main tunnel, the data message such as humiture, gas density and video around transducer, the camera constantly comprising by it in its scope of activities obtains, and the data message that obtains of buffer memory, when terminal receives after the polling request of AP, the channel quality that inquiry physical layer reports, the environment of selecting suitable communication channel to upload to be obtained according to channel quality or video information are to AP, refer to Figure 13, Figure 13 shows terminal first passage Wi-Fi channel booking and completes the process of transfer of data by photoelectricity channel.Wherein, if wireless base station receives data message, on data message, add the SSID of AP and report, add PD short address and report if PD receives data message, to realize terminal positioning.Wherein, the polling list of AP is according to the continuous mobile continuous updating of terminal.

In communication process, terminal adopt frame aggregation mode (A-MPDU aggregate frame) send data, its frame structure as shown in figure 14, and adopt piece acknowledgement frame (being specially BA piece acknowledgement frame) concentrate confirm, as shown in figure 15.

Wherein, communicating by letter between the LED head lamp of terminal and PD receiver adopts on-off keying (OOK, On-Off Keying) modulation system, mobile terminal utilizes the high frequency flicker characteristic of LED lamp to transmit with flickering of light, send signal to PD receiver, the signal of its transmission is " 0 " and " 1 ".PD receiver receives after signal, with decoder, signal is carried out to demodulation, obtains the data message that terminal sends.

At the environment of comparatively severe, the inconvenient laying center AP such as side tunnel or face, adopt distributed network architecture, and the method that shortens the interval between network element in side tunnel according to tunnel specific environment condition and take to increase PD receiver density in necessary location ensures the communication overlay in side tunnel.

In the time of terminal approaching side tunnel or face, adopt the opportunistic network communication mode based on collision probability prediction routing mechanism, the optimum node of source node first finding nearby in the time having transfer of data demand is as first via node, and between source node and first via node, utilizes wireless Wi-Fi link to realize transfer of data buffer memory by shaking hands; First via node is adopted in the same way transfer of data and is buffered in next via node, when to the last the via node of transmission can be realized the connection of same wireless base station and PD receiver, in data being uploaded onto the server by photoelectricity hybrid network by this via node, realize face terminal and be connected with the data between central server.

In sum, the present invention utilizes central network group and two kinds of network forms of opportunistic network mutually to supplement, complete the network all standing under the varying environments such as main tunnel, side tunnel, face under mine, solved the problem of laying the communication blind district that difficulty causes due to communication network; Simultaneously the present invention utilizes visible ray and two kinds of media resources of radio mutually collaborative, in the time that wherein a kind of communication link disconnects, adopts another link transmission data, and real-time passback, the service delay of having realized data are little, network efficiency is high; In addition the present invention also has the advantages such as registration is high, transmission rate is fast.

It should be noted that, each embodiment in this specification all 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 convenience of description, while describing above device, being divided into various unit with function describes respectively.Certainly, in the time implementing the application, the function of each unit can be realized in same or multiple software and/or hardware.

As seen through the above description of the embodiments, those skilled in the art can be well understood to the mode that the application can add essential general hardware platform by software and realizes.Based on such understanding, the part that the application's technical scheme contributes to prior art in essence in other words can embody with the form of software product, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, 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 some part of each embodiment of the application or embodiment.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. a wireless access points AP, is characterized in that, described AP comprises radio receiving transmitting module and visible ray receiver module, wherein:

2. AP according to claim 1, is characterized in that, the first identification information that described AP is corresponding unique.

3. AP according to claim 1, is characterized in that, described visible ray receiver module comprises K photodiode PD, the second identification information corresponding to each described PD, and described K is greater than 1 natural number.

4. a communication system, is characterized in that, comprises AP and N terminal as described in claim 1-3 any one, and described terminal intercoms mutually with described AP, also comprises;

5. communication system according to claim 4, is characterized in that, described type of service specifically comprises that positioning service, video passback business and transducer detect data passback business.

6. communication system according to claim 5, is characterized in that, described terminal comprises visible ray mobile terminal and environmental sensor terminal, the 3rd identification information that described visible ray mobile terminal is corresponding unique.

7. communication system according to claim 6, is characterized in that, described visible ray mobile terminal specifically comprises a Wi-Fi transceiver, the first VISIBLE LIGHT EMISSION device, camera and first environment transducer, wherein:

8. communication system according to claim 7, it is characterized in that, a described Wi-Fi transceiver is the positional information in place and the frequency information in the described place of arrival for safeguarding that described visible ray mobile terminal often arrives also, and broadcasts described positional information and frequency information.

9. communication system according to claim 6, is characterized in that, described environmental sensor terminal specifically comprises the 2nd Wi-Fi transceiver, the second VISIBLE LIGHT EMISSION device and second environment transducer, wherein:

10. a communication means, based on the communication system as described in claim 4-9 any one, is characterized in that, comprising:

11. communication meanss according to claim 10, it is characterized in that, described terminal is in the time receiving the solicited message of AP, adopt the one in following transmission means to send business datum to described AP according to optical, electrical channel status is corresponding: wireless system, line-of-sight propagation, to adopt the collaborative mode of radio and visible light communication simultaneously, specifically comprise:

12. communication meanss according to claim 10, it is characterized in that, described AP adds respective identification information according to the transmission means of described business datum to described business datum, and the business datum of adding after identification information is sent to described data processing module, specifically comprises:

13. communication meanss according to claim 12, it is characterized in that, described data processing module according to the type of service under the business datum after described interpolation identification information the business datum after to described interpolation identification information carry out corresponding analysis and Business Processing, specifically comprise;

14. according to the communication means described in claim 9-13 any one, it is characterized in that, also comprises:

15. communication meanss according to claim 14, it is characterized in that, described AP is according to the receive mode of described business datum of carrying additional locating information is added to respective identification information to described business datum, and the described business datum of adding after identification information is sent to described data processing module, specifically comprise:

16. communication meanss according to claim 15, it is characterized in that, described data processing module according to add after identification information described in carry the type of service described in the business datum of additional locating information, described business datum is carried out to corresponding analysis and Business Processing, specifically comprise: