CN105517145A - Vehicle wireless positioning method, wireless positioning base stations and system - Google Patents
Vehicle wireless positioning method, wireless positioning base stations and system Download PDFInfo
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- CN105517145A CN105517145A CN201510851687.4A CN201510851687A CN105517145A CN 105517145 A CN105517145 A CN 105517145A CN 201510851687 A CN201510851687 A CN 201510851687A CN 105517145 A CN105517145 A CN 105517145A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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Abstract
The embodiment of the invention provides a vehicle wireless positioning method used in a vehicle wireless positioning system. The vehicle wireless positioning system comprises at least three wireless positioning base stations and a backstage server; the wireless positioning base stations are arranged in a positioning region at intervals. The method comprises the following steps that: the wireless positioning base stations receive the positioning signals of a radio frequency label in a vehicle through a first frequency band and form positioning data; the wireless positioning base stations share the positioning data to the backstage server through a second frequency band; the backstage server positions the radio frequency label according to at least three positioning data, whereinthe at least three positioning data are the positioning data formed respectively by the at least three wireless positioning base stations according to the positioning signals of the same radio frequency label; the first frequency band and the second frequency band are different. When the method is used for sending data in a wireless connection way, the problem of inconvenient wiring at certain special districts is solved; and mutual interference of the wireless signals is avoided because the first frequency band and the second frequency band are different.
Description
Technical field
The present invention relates to intelligent transportation (IntelligentTransportationSystem, ITS) field, more particularly, relate to a kind of automobile wireless localization method, wireless location base station and system.
Background technology
Adopt the automobile wireless navigation system of radiofrequency signal, be adopt TDOA location algorithm or TOF location all to need the signal gathering >=3 wireless location base stations receptions to carry out COMPREHENSIVE CALCULATING, just can draw positional information.It is the key of whole system response speed that the data that can wireless location base station receive are uploaded to that background server carries out calculating in time.In general the data back adopting Ethernet to carry out base station is the most reliable scheme, but some do not possess the place of wiring condition on the outdoor or river course of some spaciousnesses etc., the cloth of wireless location base station is set up and will be subject to very large restriction, also have impact on the application of wireless location system.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of automobile wireless localization method, and for automobile wireless navigation system, described automobile wireless navigation system comprises wireless location base station and the background server that at least three are arranged at intervals at locating area, and described method comprises:
Described wireless location base station by the framing signal of the first band reception from the radio-frequency (RF) tag in vehicle, and forms locator data;
Described locator data is shared to described background server by the second frequency band by described wireless location base station, to make described background server according at least three described locator data radio frequency tag location, wherein at least three described locator datas are, at least three described wireless location base stations respectively according to the framing signal of same described radio-frequency (RF) tag the locator data of each self-generating, described first frequency band is different with described second frequency band.
Further,
Described first frequency band is center frequency point is 6.5Ghz, and bandwidth is the UWB frequency band of 1Ghz;
Described second frequency band is center frequency point is 4Ghz, and bandwidth is the UWB frequency band of 500Mhz.
Further, method also comprises:
Dominant base setting procedure: choose arbitrary described wireless location base station as dominant base, each described wireless location base station arranges sequence number corresponding to himself and preserves;
Described locator data is shared to described background service implement body by the second frequency band and comprises by described wireless location base station:
Passback step: described dominant base sends count information, described count information increases progressively a preset value every prefixed time interval and forms a new gear from basic gear, from basic gear, each described gear and a described sequence number correspondence, except described dominant base, described wireless location base station receives described count information, if the gear judging described count information and the described sequence number correspondence of himself preserving, then send return data to background server, wherein return data comprises the described locator data of described wireless location base station;
Circulation step: when described dominant base judges that the gear of described count information reaches termination gear, perform described passback step after a prefixed time interval.
Further, described automobile wireless navigation system also comprises time sequence control device, and method can also comprise:
Time sequence control device setting procedure: each described wireless location base station arranges corresponding sequence number unique with himself and preserves;
Described locator data is shared to described background service implement body by the second frequency band and comprises by described wireless location base station:
Passback step: send count information by time sequence control device, described count information is passed a preset value every prefixed time interval and is formed a new gear from basic gear, from basic gear, each described gear and a described sequence number correspondence, except described dominant base, described wireless location base station receives described count information, if the gear judging described count information and the described sequence number correspondence of himself preserving, then send return data to background server, wherein return data comprises the described locator data of described wireless location base station;
Circulation step: when described time sequence control device judges that the gear of described count information reaches termination gear, perform described passback step after a prefixed time interval.
Further, described numbers of gear steps is identical with the quantity of described wireless location base station.
Further, in described wireless location base station by the framing signal of the first band reception radio-frequency (RF) tag, also comprise before forming locator data step:
Each described wireless location base station forms at least one data back chain, and the wireless location base station in a described data back chain is wireless to be successively connected, and described data back chain one end is connected with described background server;
In passback step, send return data and be specially to background server:
Return data is sent to described background server away from the described wireless location base station of described background server one end via described data back chain in described data back chain, in wherein said data back chain, each described wireless location base station is after the return data receiving last described wireless location base station, the described locator data of himself is added described return data and passes to wireless location base station or described background server described in rear.
Further, a described data back chain comprises and is no more than four described wireless location base stations.
On the other hand, present invention also offers a kind of automobile wireless locating base station, comprise the first radio-frequency module and the second radio-frequency module,
Described first radio-frequency module is used for by the framing signal of the first band reception from the radio-frequency (RF) tag in vehicle, forms locator data;
Described second radio-frequency module is used for, by the second frequency band, described locator data is shared to described background server, and described first frequency band is different with described second frequency band.
Further,
Described first frequency band is center frequency point is 6.5Ghz, and bandwidth is the UWB frequency band of 1Ghz;
Described second frequency band is center frequency point is 4Ghz, and bandwidth is the UWB frequency band of 500Mhz.
Again on the one hand, present invention also offers a kind of automobile wireless navigation system, comprise at least one and be arranged at radio-frequency (RF) tag in car, at least three wireless location base station as above and background servers being arranged at intervals at locating area.
Based on technique scheme, adopt wireless connections to send locator data, solve the problem of some Special zone wiring inconvenience, the first frequency band is different with the second frequency band simultaneously avoids interfering with each other of wireless signal.Further employing UWB (UltraWideband, ultra broadband) technology carries out wireless location, and ratio of precision prior art significantly improves, and can reach ten cm.Further by the data back time of each base station in timing synchronization coherent system, the interference before can effectively avoiding mutually, raises the efficiency.Adopt data back chain to divide into groups, the layout difficulty of system can be reduced, improve the applicability of system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The flow chart of the automobile wireless location that Fig. 1 provides for the embodiment of the present invention;
The schematic diagram of the data back sequential that Fig. 2 provides for the embodiment of the present invention;
The flow chart of the passback of the wireless location base station data except dominant base that Fig. 3 provides for the embodiment of the present invention;
The flow chart of the data back sequential that Fig. 4 provides for the embodiment of the present invention;
The connection diagram of the data back that Fig. 5 provides for the embodiment of the present invention;
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1, a kind of automobile wireless localization method as shown in Figure 1, for automobile wireless navigation system, described automobile wireless navigation system comprises wireless location base station and the background server that at least three are arranged at intervals at locating area, and wireless location method comprises:
Step 101: described wireless location base station by the framing signal of the first band reception from the radio-frequency (RF) tag in vehicle, and forms locator data;
The vehicle carrying radio-frequency (RF) tag that need locate is when entering the region of location, and radio-frequency (RF) tag is activated, and constantly outwards sends framing signal, and the wireless location base station that interval is laid in locating area receives this framing signal and generates locator data.Wherein radio-frequency (RF) tag is UWB radio-frequency (RF) tag, and its framing signal of launching adopts center frequency point to be 6.5Ghz, and bandwidth is that the UWB frequency band of 1Ghz transmits.
Step 102: described locator data is shared to described background server by the second frequency band by described wireless location base station, to make described background server according at least three described locator data radio frequency tag location, wherein at least three described locator datas are, at least three described wireless location base stations respectively according to the framing signal of same described radio-frequency (RF) tag the locator data of each self-generating, described first frequency band is different with described second frequency band.
Concrete, be 6.5Ghz in center frequency point, bandwidth be the UWB band reception of 1Ghz to multiple wireless location base stations of the framing signal of same radio-frequency (RF) tag all by being 4Ghz in center frequency point, bandwidth is that formation locator data is transferred to background server by the UWB frequency band of 500MHz.The locator data that background server returns according at least three wireless location base stations positions the radio-frequency (RF) tag sending this framing signal.
Understandable, in order to can accurately locate, therefore when need ensure that when locating area lays wireless location base station radio-frequency (RF) tag sends framing signal in locating area during any point, have at least three wireless location base stations can receive this framing signal.
Further, as long as the first frequency band and the second frequency range do not overlap, the UWB frequency band that other are different can also be adopted.
Adopt this method wireless connections to send locator data, solve the problem of some Special zone wiring inconvenience, the first frequency band is different with the second frequency band simultaneously avoids interfering with each other of wireless signal.Adopt UWB technology to carry out wireless location, ratio of precision prior art significantly improves, and can reach ten cm.
Embodiment 2, as in Figure 2-4, the method can also comprise:
Step 201: dominant base setting procedure, chooses arbitrary described wireless location base station as dominant base, and each described wireless location base station arranges sequence number corresponding to himself and preserves;
Understandable, when laying wireless location base station, can arrange a sequence number corresponding with himself for the wireless location base station in same locating area and preserve, the sequence number of the wireless location base station in same locating area is different.Therefrom choose one as master station.
Described locator data is shared to described background service implement body by the second frequency band and comprises by described wireless location base station:
Step 301: passback step: described dominant base sends count information, described count information increases progressively a preset value every prefixed time interval and forms a new gear from basic gear, from basic gear, each described gear and a described sequence number correspondence, except described dominant base, described wireless location base station receives described count information, if the gear judging described count information and the described sequence number correspondence of himself preserving, then send return data to background server, wherein return data comprises the described locator data of described wireless location base station; Wherein numbers of gear steps is identical with the quantity of described wireless location base station.
Assumed wireless locating base station is four, each sequence number is respectively 1,2,3,4, one of them is dominant base, dominant base outwards sends count information with a fixed cycle, the transmission cycle meets the maximum time of wireless location base station passback required for locator data, from the beginning, often launch a count information, count information adds one.
In four wireless location base stations except dominant base, arbitrary wireless location base station, judge that gear and the sequence number of himself of the count information received are corresponding, then send return data to background server, wherein return data comprises the locator data of described wireless location base station; Understandable, the control device of dominant base is when calculating count information gear, if the sequence number of count information gear and dominant base itself is corresponding, then directly controls dominant base and send return data, without the need to being obtained the gear of count information by the mode of reception technique information.The sequence number of each value in count information and a wireless location base station is corresponding.
Step 302: circulation step: when described dominant base judges that the gear of described count information reaches termination gear, perform described passback step after a prefixed time interval.
Understandable, when count information is four, send count information is one next time, and restarts to add one at every turn.
Adopt this method, by the data back time of base station each in count information coherent system, the interference before can effectively avoiding mutually, raises the efficiency.
Embodiment 3, in the present embodiment, except count information is sent by time sequence control device, other parts are identical with embodiment 2, specific as follows:
Described method also comprises:
Step 401: time sequence control device setting procedure: each described wireless location base station arranges corresponding sequence number unique with himself and preserves;
Described locator data is shared to described background service implement body by the second frequency band and comprises by described wireless location base station:
Step 501: passback step: send count information by time sequence control device, described count information is passed a preset value every prefixed time interval and is formed a new gear from basic gear, from basic gear, each described gear and a described sequence number correspondence, except described dominant base, described wireless location base station receives described count information, if the gear judging described count information and the described sequence number correspondence of himself preserving, then send return data to background server, wherein return data comprises the described locator data that described wireless location base station receives, described numbers of gear steps is identical with the quantity of described wireless location base station.
Step 502: circulation step: when described time sequence control device judges that the gear of described count information reaches termination gear, perform described passback step after a prefixed time interval.
Embodiment 4, as shown in Figure 5, in the present embodiment, in step 101: described wireless location base station, by the framing signal of the first band reception radio-frequency (RF) tag, also comprises before forming locator data step:
Each described wireless location base station forms at least one data back chain, and the wireless location base station in a described data back chain is wireless to be successively connected, and described data back chain one end is connected with described background server;
Transmission return data then in embodiment 1, embodiment 2 or embodiment 3 is specially to background server:
Return data is sent to described background server away from the described wireless location base station of described background server one end via described data back chain in described data back chain, in wherein said data back chain, each described wireless location base station is after the return data receiving last described wireless location base station, the described locator data of himself is added described return data and passes to wireless location base station or described background server described in rear.
Illustrate below, the each wireless location base station being arranged at locating area forms at least one data back chain, a data back chain comprises four wireless location base stations, be respectively wireless location base station A connected successively, wireless location base station B, wireless location base station C and wireless location base station D, wherein wireless location base station D is connected with background server.
The locator data of himself is sent to radio positioning signal B by wireless location base station A, and the locator data that now wireless location base station A sends is return data;
The locator data of himself is added return data and upgrades by radio positioning signal B, and the return data after renewal is sent to wireless location base station C by radio positioning signal B;
The locator data of himself is added the return data of radio positioning signal B transmission and upgrades by radio positioning signal C, and the return data after renewal is sent to wireless location base station D by radio positioning signal C;
The locator data of himself is added the return data of radio positioning signal C transmission and upgrades by radio positioning signal D, and the return data after renewal is sent to background server by radio positioning signal D.
The return data that now background server receives just contains: the locator data of wireless location base station A; The locator data of wireless location base station B; The locator data of wireless location base station C; The locator data of wireless location base station D.After background server obtains the return data of multi-group data passback chain, background server just can according at least three locator data radio frequency tag location.
Further, a described data back chain comprises and is no more than four described wireless location base stations.Owing to adopting chain type transmission, when the base station on a data back chain is greater than four, transmission delay becomes large, and transmission reliability is deteriorated.Adopt data back chain to divide into groups, the layout difficulty of system can be reduced, improve the applicability of system.
In one embodiment, present invention also offers a vehicle kind wireless location base station, comprise the first radio-frequency module and the second radio-frequency module,
Described first radio-frequency module is used for by the framing signal of the first band reception from the radio-frequency (RF) tag in vehicle, and forms locator data;
Described second radio-frequency module is used for, by the second frequency band, described locator data is shared to described background server, to make described background server according at least three described locator data radio frequency tag location, wherein at least three described locator datas are, at least three described wireless location base stations respectively according to the framing signal of same described radio-frequency (RF) tag the locator data of each self-generating, described first frequency band is different with described second frequency band.
Wherein said first frequency band is center frequency point is 6.5Ghz, and bandwidth is the UWB frequency band of 1Ghz;
Described second frequency band is center frequency point is 4Ghz, and bandwidth is the UWB frequency band of 500Mhz.
Described wireless location base station also comprises memory module, and described memory module is for preserving the sequence number corresponding with himself.
Described second radio-frequency module is also for sending count information, described count information increases progressively preset value every prefixed time interval and forms a new gear from basic gear, from basic gear, each described gear and a described sequence number correspondence, except described dominant base, described wireless location base station receives described count information and the described sequence number correspondence judging its gear and himself preserve, then send return data to background server, wherein return data comprises the described locator data of described wireless location base station.
Described wireless location base station also comprises judge module, when described judge module is for judging that the gear of described count information reaches termination gear, after a prefixed time interval, arranges gear based on described count information.
Present invention also offers a kind of automobile wireless navigation system, comprise at least one and be arranged at radio-frequency (RF) tag in car, at least three automobile wireless locating base station as above and background servers being arranged at intervals at locating area.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an automobile wireless localization method, for automobile wireless navigation system, described automobile wireless navigation system comprises wireless location base station and the background server that at least three are arranged at intervals at locating area, and it is characterized in that, described method comprises:
Described wireless location base station by the framing signal of the first band reception from the radio-frequency (RF) tag in vehicle, and forms locator data;
Described locator data is shared to described background server by the second frequency band by described wireless location base station, to make described background server according at least three described locator data radio frequency tag location, wherein at least three described locator datas are, at least three described wireless location base stations respectively according to the framing signal of same described radio-frequency (RF) tag the locator data of each self-generating, described first frequency band is different with described second frequency band.
2. method according to claim 1, is characterized in that,
Described first frequency band is center frequency point is 6.5Ghz, and bandwidth is the UWB frequency band of 1Ghz;
Described second frequency band is center frequency point is 4Ghz, and bandwidth is the UWB frequency band of 500Mhz.
3. method according to claim 1 and 2, is characterized in that, also comprises:
Dominant base setting procedure: choose arbitrary described wireless location base station as dominant base, each described wireless location base station arranges sequence number corresponding to himself and preserves;
Described locator data is shared to described background service implement body by the second frequency band and comprises by described wireless location base station:
Passback step: described dominant base sends count information, described count information increases progressively a preset value every prefixed time interval and forms a new gear from basic gear, from basic gear, each described gear and a described sequence number correspondence, except described dominant base, described wireless location base station receives described count information, if the gear judging described count information and the described sequence number correspondence of himself preserving, then send return data to background server, wherein return data comprises the described locator data of described wireless location base station;
Circulation step: when described dominant base judges that the gear of described count information reaches termination gear, perform described passback step after a prefixed time interval.
4. method according to claim 1 and 2, described automobile wireless navigation system also comprises time sequence control device, it is characterized in that, described method also comprises:
Time sequence control device setting procedure: each described wireless location base station arranges corresponding sequence number unique with himself and preserves;
Described locator data is shared to described background service implement body by the second frequency band and comprises by described wireless location base station:
Passback step: send count information by time sequence control device, described count information is passed a preset value every prefixed time interval and is formed a new gear from basic gear, from basic gear, each described gear and a described sequence number correspondence, except described dominant base, described wireless location base station receives described count information, if the gear judging described count information and the described sequence number correspondence of himself preserving, then send return data to background server, wherein return data comprises the described locator data of described wireless location base station;
Circulation step: when described time sequence control device judges that the gear of described count information reaches termination gear, perform described passback step after a prefixed time interval.
5. method according to claim 3, is characterized in that, described numbers of gear steps is identical with the quantity of described wireless location base station.
6. method according to claim 3, is characterized in that, in described wireless location base station by the framing signal of the first band reception radio-frequency (RF) tag, also comprises before forming locator data step:
Each described wireless location base station forms at least one data back chain, and the wireless location base station in a described data back chain is wireless to be successively connected, and described data back chain one end is connected with described background server;
In passback step, send return data and be specially to background server:
Return data is sent to described background server away from the described wireless location base station of described background server one end via described data back chain in described data back chain, in wherein said data back chain, each described wireless location base station is after the return data receiving last described wireless location base station, the described locator data of himself is added described return data and passes to wireless location base station or described background server described in rear.
7. method according to claim 6, is characterized in that, a described data back chain comprises and is no more than four described wireless location base stations.
8. an automobile wireless locating base station, is characterized in that, comprises the first radio-frequency module and the second radio-frequency module:
Described first radio-frequency module is used for by the framing signal of the first band reception from the radio-frequency (RF) tag in vehicle, forms locator data;
Described second radio-frequency module is used for, by the second frequency band, described locator data is shared to described background server, and described first frequency band is different with described second frequency band.
9. wireless location base station according to claim 8, is characterized in that,
Described first frequency band is center frequency point is 6.5Ghz, and bandwidth is the UWB frequency band of 1Ghz;
Described second frequency band is center frequency point is 4Ghz, and bandwidth is the UWB frequency band of 500Mhz.
10. an automobile wireless navigation system, is characterized in that, comprises at least one and is arranged at radio-frequency (RF) tag in car, at least three automobile wireless locating base station as claimed in claim 8 or 9 and background servers being arranged at intervals at locating area.
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