CN100499413C - Frequency-modulation data broadcasting system for vehicle navigation information distribution system - Google Patents
Frequency-modulation data broadcasting system for vehicle navigation information distribution system Download PDFInfo
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- CN100499413C CN100499413C CNB2004100661509A CN200410066150A CN100499413C CN 100499413 C CN100499413 C CN 100499413C CN B2004100661509 A CNB2004100661509 A CN B2004100661509A CN 200410066150 A CN200410066150 A CN 200410066150A CN 100499413 C CN100499413 C CN 100499413C
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Abstract
The present invention belongs to the field of the application of radio FM data broadcast in intelligent traffic vehicle navigation system. The FM data broadcast system includes two parts of FM datan information issuing platform and FM data receiving module in navigation computer. The FM datan information issuing platform includes data collecting device connected to traffic information issuing center or other information source, information processing device, communication station data receiving device, and subsidiary carrier modulating and duplexing device, and is connected to FM emitting station, public mobile communication network and Internet. The present invention makes full use of the frequency resource of available FM broadcasting network and the service function of public communication network, can save great amount of investment and overcome the demerit of limited coverage range of available technology.
Description
One, technical field
The invention belongs to the radio broadcasting technical field.Specifically, be that the frequency modulated subcarrier Radio Data System is applied in the intelligent traffic vehicle navigation system, make up a unidirectional real-time and dynamic transport information distribution platform.
Two, technical background
The frequency modulated subcarrier data broadcasting refers to and utilizes the frequency modulated subcarrier technology to carry out data broadcasting to satisfy the demand of certain application data issue, and it is to utilize the idle frequency resource of FM broadcasting to carry out data broadcasting.The advantage of frequency modulated subcarrier is: at first, in FM broadcasting, high-end frequency band belongs to slack resources, need not apply for new frequency to its development and use, makes again by idle resource to be fully used when not increasing input substantially; The second, the checking station of national 10KW has more than 1000 approximately.Use the subcarrier technology to use existing aerial coverage rate,, will form a data broadcast network identical with main channel, that cover the whole nation again each base station networking; Three, this technology is applied to intelligent traffic vehicle navigation and information issuing system, can realize the issue of real-time, dynamic transport information and out of Memory effectively, it is good to have real-time, it is low to build input cost and use cost, under the zone that has covered, can provide transfer of data (unidirectional) and information publication channel for the vehicle that moves effective and rapidly.Therefore, this technology is used to the intelligent transportation navigation field of developed country, and has formed corresponding international standard.
For example, the radio data system (RDS) of Europe exploitation is exactly a kind of novel data broadcast service.The mid-1970s is born in West Europe, and European Broadcasting Union formulated unified standard in 1986.Utilize RDS, can transmit, or supply the character of printer prints, or transmit information such as computer software, switch control information, receiver auxiliary tuning for the literal or the figure that on phosphor screen or LCDs, show.It can be various information and the identification signal that the driver transmits the Traffic Announcement radio station, and RDS is quite universal in West Europe at present
At present, RDS is widely used in the whole world.RDS selects for use 57 kilo hertzs to be subcarrier, adopt suppressed subcarrier amplitude modulation (or claiming 2 phase phase shift keyings) mode to transmit information, constitute the RDS channel, constitute the modulating baseband signal of the FM stereophonic broadcast that has RDS again with main channel, subchannel, the pilot tone of FM stereophonic broadcast, more jointly to high frequency main carrier frequency modulation.The speed that RDS transmits information is about 1.2 kilobits/per second.
Adopt the RDS system, data transfer rate is low, and to the moving target poor effect.
Japan has passed through a system standard in May, 1993, names to be data broadcasting channel (DARC) system, and its outstanding advantage is the data transfer rate height, can reach 16 kilobits/per second, and anti-error code capacity is strong.The DARC system is the f-m multiplex high-speed datacasting system of Japanese NHK (Nippon Hoso Kyokai) exploitation.The DARC system is recommended as international standard in nineteen ninety-five through International Telecommunications Union.Modulation system and coding structure that this system adopts not only be suitable for fixingly receiving, but also have been suitable for moving and receive, and transmission capacity are relatively large.This system can also compatible RDS.Have transfer rate and mobile easily receptivity at a high speed, promotion and application in recent years just because of the DARC system.In automobile navigation was used, the typical application system was the VICS (VehicleInformation Communication System vehicle information communicating system) of Japan.
The VICS system provides information such as running information, control traffic message and basic geography for the vehicle that moves by the transport information of frequcny modulation data broadcast distribution dynamic real-time.The positional information that vehicle can also provide according to GPS is determined own position by map easily, relies on the processing of computer to implement inducing of automobile navigation and travels, and vehicle can be selected best route, with the shortest running time arrival destination.VICS to Tokyo the improvement of traffic play an important role.VICS develops rapidly in Japan, with GPS vehicle mounted guidance machine form integrated, become ITS build in requisite facility.At present have 2/3 territory to develop VICS in Japan, the entrucking rate of GPS vehicle mounted guidance machine reaches automobile and has 40% of total amount.Up to now, only the in-vehicle navigation apparatus sales volume just surpasses ten million cover.The development of VICS has produced good social effect to the traffic environment of Japan. and also brought huge economic benefit (to come from simultaneously
Http:// www.vics.or.jp/).
An important reasons of VICS success, it is exactly the support that it has the FM broadcast network information issuing function, thereby with a part and parcel in the intelligent transportation notion---the vehicle and the transport information platform of motion closely link together, and become one of one most important " bright spot " in the Japanese ITS field.
Japan VICS system transport information distribution platform is to be grouped into by information source, information processing and sending part.It sends part is to constitute by frequcny modulation data transmitting station, the wireless transmission tower (Beacon) that is arranged at the highway limit and infrared emission tower.It is a private network, need to build a huge network, invests hugely, and can not guarantee seamless covering.According to the deficiency of said system, in conjunction with the actual conditions and the present attainable technological means of China, we propose this invention.
Three, summary of the invention
The objective of the invention is to make full use of the frequency resource and the overlay area thereof of existing checking station.In the zone that FM broadcasting can't cover, then utilize the data communication of mobile network for public realization to guiding aircraft, finish information issuing function.Also realize each intercity networking and information sharing simultaneously by the internet.The present invention has avoided setting up the required huge input of private network, makes full use of the frequency resource of existing FM broadcast network and the service function that public network can provide, and has also overcome the shortcoming of limited coverage area.
This frequcny modulation data broadcast system comprises frequcny modulation data broadcast message distribution platform and guiding aircraft frequcny modulation data receiver module.Wherein, guiding aircraft frequcny modulation data receiver module (2) can be one with the vehicle mounted guidance machine be integrated into holistic, also can be the autonomous device that guiding aircraft is connected, communication interface modules with frequcny modulation data receiving function, its function is to provide real time data at a high speed for the automobile navigation machine, this module is finished the reception of frequency modulated subcarrier data-signal, comprise FM radio station frequency point scanning and locking, separate the mediation reception, offer the guiding aircraft host CPU and do further information processing and show output.
The basic function of frequcny modulation data broadcast message distribution platform is collection, storage, the editor of realization information, and finish multiplexing, modulation and send by the subcarrier channel that the checking station provides, specifically form that to be data collection facility by LAN, WAN or private-line mode link to each other with transport information issue center or out of Memory source offers messaging device with the reception of finishing information needed, preliminary treatment and by LAN; Messaging device is finished works of treatment such as the arrangement, storage, editor of information, institute's information releasing is controlled and managed, with data to be sent, the one, deliver to the data receiver in radio station through data network or special line remote transmission passage, deliver to sub-carrier modulation and multiplexing equipment by netting twine then, this base band data is carried out after the sub-carrier modulation multiplexing with main carrier signal, deliver to frequency modulation broadcasting station again and send, frequency modulation broadcasting station is realized frequcny modulation data signal sending function; The 2nd, send to the user through the public mobile communication net with note or packet data transmission mode; The 3rd, realize information sharing by internet and the networking of other city.
The frequcny modulation data broadcast mode is used for the covering to the urban area, the zone that intercity FM broadcast network fails to cover will be finished the issue of networking user's information by the public mobile communication net, realize the seamless covering of moving vehicle and the service of information such as traffic is provided with this.
The native system technical system is selected DARC (the Data Radio Channel) standard of being proposed as international standard for use.Frequcny modulation data sends by the subcarrier frequency range of the subcarrier 76kHz in the FM stereophonic broadcast, and the data rate of 16kbps can be provided for guiding aircraft or other application, can realize the transfer function of the required data of transport information issue, text and image.
Four, description of drawings
Accompanying drawing 1 is a frequcny modulation data broadcast system The general frame.
Number in the figure title: 1-frequcny modulation data broadcast message distribution platform, 2-guiding aircraft frequcny modulation data receiver module.
Accompanying drawing 2 is a frequcny modulation data broadcast message distribution platform theory diagram.
Number in the figure title: 3-transport information issue center, 4-out of Memory source, 5-data collection facility, 6-messaging device, 7-data receiver, 8-sub-carrier modulation and multiplexing equipment, 9-frequency modulation broadcasting station, 10-public mobile communication net, 11-internet.
Five, embodiment
According to the foregoing invention content, the enforcement of this patent will be made of two parts (see figure 1), promptly be positioned at the guiding aircraft frequcny modulation data receiver module 2 and the frequcny modulation data broadcast message distribution platform 1 that is positioned at control centre's transmitting station of mobile terminal.
Frequcny modulation data broadcast message distribution platform 1 is by data collection facility 5, messaging device 6), functional block diagrams such as several parts such as data receiver 7, sub-carrier modulation and multiplexing equipment 8, frequency modulation broadcasting station 9 and the public mobile communication net 10 that links to each other with messaging device 6 and internet 11, the transport information issue center 3 or out of Memory source 4 block diagrams that link to each other with data collection facility 5 form.Data collection facility, messaging device, data receiver are desktop computer; Public mobile communication net 10 is the public network that is connected with internet 11.
Data collection facility links to each other with traffic information center or center, out of Memory source by LAN, WAN or special line, obtains required information releasing data, delivers to messaging device after preliminary treatment.Through editing and processing, messaging device is sent to the sub-carrier modulation and the multiplexing equipment that are positioned at launch point by data network or special line with the information of handling well and handles through the communication front-end of necessity, after power amplifier output is delivered to the antenna emission through feeder line.
Messaging device also sends to the user who needs by the public mobile communication net with note or packet data transmission mode simultaneously, realizes information sharing by internet and the networking of other city.
Claims (3)
1, a kind of frequcny modulation data broadcast system that is applied to Vehicular navigation system, comprise frequcny modulation data information promulgating platform (1) and guiding aircraft frequcny modulation data receiver module (2) two parts, it is characterized in that described frequcny modulation data broadcast message distribution platform (1), comprise that the data collection facility (5) that links to each other with transport information issue center (3) or out of Memory source (4) is connected in radio station data receiver (7) through messaging device (6) by data network or special line, be connected in sub-carrier modulation and multiplexing equipment (8) by netting twine then, the public mobile communication net (10) and internet (11) that are connected in frequency modulation broadcasting station (9) again and link to each other respectively with messaging device (6) output; By internet (11) and the networking of other cities, will send to the user with note or packet data transmission mode by the public mobile communication net in the zone that intercity FM broadcast network fails to cover, finish seamless covering with this to moving vehicle.
2, frequcny modulation data broadcast system according to claim 1 is characterized in that will finishing information issuing function by the public mobile communication net in the zone that FM broadcast network fails to cover.
3, frequcny modulation data broadcast system according to claim 1 is characterized in that realizing information sharing by internet (11) and other city networkings.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100661509A CN100499413C (en) | 2004-12-10 | 2004-12-10 | Frequency-modulation data broadcasting system for vehicle navigation information distribution system |
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| CNB2004100661509A CN100499413C (en) | 2004-12-10 | 2004-12-10 | Frequency-modulation data broadcasting system for vehicle navigation information distribution system |
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| CN1622498A CN1622498A (en) | 2005-06-01 |
| CN100499413C true CN100499413C (en) | 2009-06-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100430969C (en) * | 2005-09-19 | 2008-11-05 | 上海乐金广电电子有限公司 | Vehicle comprehensive management system and method using mobile communication terminal machine |
| CN101217326B (en) * | 2007-12-27 | 2010-04-07 | 上海交通大学 | A system on urban traffic information broadcasting aiming at dynamic traffic guidance |
| CN101807963A (en) * | 2010-03-12 | 2010-08-18 | 圆刚科技股份有限公司 | Mobile playing method and mobile playing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003063529A1 (en) * | 2002-01-24 | 2003-07-31 | Newport Coast Investments Llc | Dynamic creation, selection, and scheduling of radio frequency communications |
| CN1544885A (en) * | 2003-11-18 | 2004-11-10 | �Ϻ���ͨ��ѧ | Vehicle guidance system communication group network model |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003063529A1 (en) * | 2002-01-24 | 2003-07-31 | Newport Coast Investments Llc | Dynamic creation, selection, and scheduling of radio frequency communications |
| CN1544885A (en) * | 2003-11-18 | 2004-11-10 | �Ϻ���ͨ��ѧ | Vehicle guidance system communication group network model |
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Assignee: NANJING INTERCITY ONLINE INFORMATION TECHNOLOGY CO., LTD. Assignor: Nanjing University Contract record no.: 2012320000083 Denomination of invention: Frequency-modulation data broadcasting system for vehicle navigation information distribution system Granted publication date: 20090610 License type: Exclusive License Open date: 20050601 Record date: 20120220 |
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