CN1282692A

CN1282692A - User terminal of combined multifunctional positioning communication system

Info

Publication number: CN1282692A
Application number: CN 00100627
Authority: CN
Inventors: 庄大川; 庄达艺
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-25
Filing date: 2000-01-25
Publication date: 2001-02-07

Abstract

A user terminal of combined multifunctional locating communication system uses a combined navigation locating system for cars in city composed of GPS, inertial gyro and colculation locating assembly for obtaining stable and continuous locating information. The GPS works in real-time differential mode to reduce error to 10 m or less. Its bidirectional wireless data communication system works in UHF section with trequency width of 2-10 MH2 end uses CDMA system for high capacity, reliability and compatibility. Besides said locating function, it can serve for other purposes such as collecting, transferring and issuing information.

Description

User terminal of combined multifunctional positioning communication system

The location tracking technique is used and is started from the beginning of the seventies.In recent years along with the demand of applications such as social modernization, military affairs, public security, the vehicle security personnel of organization and individual, public transport, shipping, waterborne traffic and harbour pilot is more and more urgent, american global positioning system (GPS) place in operation impels location tracking technique and application to enter a brand-new stage.

In recent years, the locating and tracking system that with GPS is alignment sensor becomes a very popular emerging high-tech development project at home and abroad, Japan, U.S. and west european developed country all drops into substantial contribution and technical force is engaged in development research are domesticly also catching up with at a quick pace.With GPS is the locating and tracking system of alignment sensor, GPS is main positioning means, but, the GPS frequency of operation is a microwave frequency band, all can take place to cause the location information instability discontinuous under narrow street that the city high constructure stands in great numbers, underground passage way, the overpass and under the dense woods shade because of blocking lossing signal.According to mensuration, the big city street guarantees that the continuous reliability of location information is not higher than 70%, therefore must introduce the piloting sensor assists and reaches more than 99% the 100 meters requirements that can not satisfy integrated positioning system of the position error of GPS in addition with the guarantee information reliability.

Mobile communication be possible say so in the present communication with fastest developing speed one part, from the Da Qu system to sub-district system (being Cellular Networks), from analog to digital, develop very fast, after first generation analog cellular telephone appearance in 1979, but 10 years, the digital cell phone system of the second generation just is born.The person communication system of the third generation occurred already now, and the current especially communication technology focus of multi-media radio access technology.

This user terminal of combined multifunctional positioning communication system adopts GPS and inertia gyroscope and piloting to constitute integrated navigation and location system, thoroughly solved the unstable and discontinuous shortcoming of GPS locating information in the city, reached requirement automobile navigation location integrity availability; Work in the GPS mode of operation of real time differential, accuracy of positioning improves greatly, and error is less than or equal to 10 meters; Wireless two-way data communication system frequency of operation is uhf band (optional), occupied frequency bandwidth 2MHz-10MHz (optional).Data communication system adopts CDMA system, power system capacity, and the reliability of information transmission height is compatible good; System sets up simple.User terminal of combined multifunctional positioning communication system (seeing accompanying drawing) function:

With inferring navigation, inertia member and GPS combined positioning method METHOD FOR CONTINUOUS DETERMINATION vehicle location

The real time position data of transmission itself

Transmission/reception multimedia mail data

Carry out automobile navigation user terminal of combined multifunctional positioning communication system characteristic

The GPS receiver

* SPL (LI) type: 1575.420MHz

* 10 parallel channels

* C/A sign indicating number and LI carrier wave mutually pick/receive the * frequency: uhf band (optional)

* transmitting frequency can be different with receive frequency, also can be identical (distinguishing) by pseudo-code

* occupied frequency bandwidth: 2MHz-10MHz (optional)

* modulation system: π/4-QPSK

* launch mode: CDMA

* power supply: 9-35V direct current

* power requirement: 12W

* mileage meter input, inertial gyroscope, GPS integrated positioning

* RS232 is used for outside portable End of Data

Claims

One, to follow the tracks of communication system be a kind of radio position system that power actuated vehicle is monitored and searched of being used for for multi-functional integrated positioning, comprises (1) base station; (2) repeater station; (3) mobile subscriber terminal; (4) position data is handled and switching centre; (5) user monitoring terminal;

Integrated positioning is followed the tracks of communication system mobile subscriber terminal principal character: mobile subscriber terminal sends to the location information or multimedia (sound, image, the data) mail of this vehicle the base station or delivers to the base station by repeater station by wireless mode, base station position data is handled and switching centre handles the data of receiving, multimedia (sound, image, data) mail is linked to the ISDN net by switching centre, location information is delivered to user monitoring terminal, shows this vehicle position by user monitoring terminal.Mobile subscriber terminal receives control information and multimedia (sound, image, the data) mail that is transmitted by base station or repeater station simultaneously, and links to each other with the multimedia terminal by the mobile subscriber terminal delivery port
Two, follow the tracks of the communication system mobile subscriber terminal according to the described integrated positioning of claim one, integrated positioning track channel according to claim 1, this system also comprises the wireless two-way data communication system, data communication system adopts the CDMA system, frequency of operation uhf band (optional), occupied frequency bandwidth 2MHz-10MHz (optional).
Three, follow the tracks of the communication system mobile subscriber terminal according to the described integrated positioning of claim one and adopt GPS, inertia gyroscope and piloting to constitute integrated navigation and location system, work in the real time differential GPS mode of operation
Four, follow the tracks of the communication system mobile subscriber terminal according to the described integrated positioning of claim one four kinds of mode of operations are arranged: vehicle position information repeats with the renewal digit rate of regulation

When having only the base station to require, the location information of ability reporting vehicle

Has only local system because external event (report to the police, plunder etc.) sends when asking, just the location information of reporting vehicle.

Can carry out multi-media communication in real time