Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of car hand set integral system based on Bluetooth transmission, car machine and the mobile phone of band bluetooth are formed communication network system, whole system carries out information transmission by bluetooth, realize car machine and mobile phone interactive cooperation, mobile phone is as the display screen of car machine, and car machine is as data in mobile phone collection and control terminal.
Technical scheme of the present invention is: a kind of car hand set integral system based on Bluetooth transmission, comprise in-vehicle information network system and Mobile Internet system, described in-vehicle information network system comprises, ECU module: ECU module receives data or the order of mobile phone, and response instruction, perform mobile phone command or send order to mobile phone, realize mobile phone and car machine is interconnected; Car machine bluetooth module: the information exchange medium of car machine, car machine connects mobile phone by car machine bluetooth module; Car machine human-computer interaction module: car machine controls mobile phone by car machine human-computer interaction module; Car electrics: ECU module gathers the operational factor of car electrics by CAN; Described Mobile Internet system comprises: Bluetooth of mobile phone module: the information exchange medium of mobile phone and car machine, and mobile phone carries out information exchange by bluetooth communication module and car machine; Mobile phone human-computer interaction module: be used for car machine sending controling instruction; Car is networked: by mobile phone to car machine sending controling instruction, controls car electrics and gathers car electrics operational factor, and carrying out operational analysis to the parameter returned.Described car machine human-computer interaction module comprises automobile button and voice-input device.Described mobile phone is connected by 3G, GPRS, WIFI or 4G network with car networking.Described car electrics comprise WIFI camera, and car networking is by mobile phone control WIFI camera.Described car electrics comprise sound equipment, mobile phone by Bluetooth of mobile phone module by audio file transmissions to car machine, played back by sound equipment.Touch mode by NFC before described car machine bluetooth module or Bluetooth of mobile phone module send data and transmit decruption key to recipient, with encryption key, data are encrypted.Described car machine bluetooth module or Bluetooth of mobile phone module do not need coupling and certification to another equipment transmission data.
The present invention has following good effect: car machine and automobile CAN-bus network information gathering, high-fidelity sound are play and intelligent mobile phone platform APP applies and development of Mobile Internet technology is applied to organically combine and upgraded by the vehicle mounted electrical apparatus of low cost, and forms good Consumer's Experience.Adopt this standard carry out mobile phone car machine interconnected time, can realize the installation mobile phone of application specific software and the double-direction control of car machine, make user in vehicle traveling process, without looking at mobile phone screen, touch mobile phone screen or operating handset button, only need to control mobile phone by the physical button on vehicle-mounted or voice command, comprise answer/make phone, media play, GPS navigation etc., also can complete the functions such as vehicle backing backsight, vehicle data collection, failure diagnosis, remote monitoring simultaneously, thus realize the upgrading of low cost vehicle-mounted system.
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is as the effect of the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part and operation principle, manufacturing process and operation using method etc., be described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.
The invention provides a kind of car machine of band bluetooth communication that utilizes (with the equipment with or without display screen, as electricity adjusts broadcast receiver, the stereo sets such as CD player) form the car hand set integral system of communication network system with the smart mobile phone of band bluetooth, in vehicle-mounted ECU and car CAN and car, electrical equipment forms in-vehicle network information system, smart mobile phone and the Internet form Mobile Internet system, by bluetooth car machine and the interconnected car hand set integral system realizing being with the car machine of displayless equipment and mobile phone resources to share of car machine.The invention provides the solution be connected with the car machine equipment without display screen by mobile device, utilize the display screen of smart mobile phone and between application software and car machine, two-way communication brings stronger interactive multi-mode to experience.The stereo set of car machine is as the sound equipment of mobile phone, and the physical button of car machine is as the control button of mobile phone, and mobile phone is as the display screen of car machine, navigator and control port etc.
One, bluetooth communication module
Car machine bluetooth module connects user's bluetooth cellular phone, constitutes wireless communication networks in car, and user mobile phone installs special communication process software to realize the object by mobile phone interface and automobile exchange message.Car machine uses the equipment such as physical button or voice, controls smart mobile phone by bluetooth module; Such as, by car machine button answering cell phone phone, or mobile phone player is transferred to car machine sound equipment, mobile phone song etc. is play with car machine sound equipment, smart mobile phone connects car machine by bluetooth module, control car machine and complete the functions such as the collection of vehicle data operational factor, failure diagnosis, and result is turned back to mobile phone display screen; Data can be sent to car networking data server by wireless Internet (as 3G, GPRS, WIFI, 4G network) and to carry out storing, analyze, process, to realize the part basic function of car networking, the functions such as such as failure diagnosis by smart mobile phone again.
Two, car machine
This invents mainly for the car machine without display screen, except normal amusement function, as AM/FM radio reception, MP3/WMA digital broadcast, CD play, and on-vehicle Bluetooth.The information that needs maybe can be shown by the ECU cell processing of the information read from bus as the states such as air-conditioner temperature, road speed, Fuel Oil Remaining, engine temperature, mileage, vehicle internal and external temperature and door lock, vehicle window, safety belt, parking brake, trunk, bonnet, car light send car machine to is shown by mobile phone and maybe will the information of voice message be needed to be play by Music centre loudspeaker.Parameter, by the operational factor of each electrical equipment of CAN collection vehicle, is then turned back to mobile phone display screen by bluetooth module, realizes car machine status monitoring by ECU.
Using method of the present invention is: mobile phone utilizes particular network (2G, 3G or 4G) to send instruction by specific application software operation interface or car internet services operator, instruction is sent to the ECU of car machine through bluetooth communication module, ECU starts corresponding operation after receiving instruction, carries out the operations such as remote monitoring as controlled broadcast receiver, CD Player, vehicle carried data collecting, vehicle-mounted fault diagnosis or starting Wifi camera; Mobile phone transmits voice data by bluetooth communication module, and voice data is delivered to the stereo set of car machine by bluetooth module, and the Music centre loudspeaker eventually through car machine exports mobile phone audio-frequency data.
Car machine to be controlled by bluetooth communication module by physical button or notifies mobile phone, comprise receive calls, the function such as media play, GPS navigation, vehicle backing backsight, fault upload.Smart mobile phone is as the display screen of car machine and car networking data Transmit-Receive Unit.
Bluetooth is a kind of open short-distance wireless communication technology, and it is based on the near radio of low cost connects, and sets up one be connected especially for fixing with mobile device communication environment.For meeting basic safety and interference free performance demand, the invention provides a kind of mechanism of transmitted data acquisition being encrypted in application layer.At this moment we can adopt certain cryptographic algorithm, transmit leg equipment is first touched mode by NFC before transmitting the data and is transmitted decruption key to receiver equipment, then transmitted data encryption key is encrypted, then uses bluetooth non-security mode to send to the other side information after encryption.Owing to using non-security mode transmission, between two bluetooth equipments, do not need pairing and mutual certification.
For the cryptographic algorithm used, we both can adopt symmetric encipherment algorithm, and now we transmit the symmetric key of stochastic generation before transmitting the data; Or employing public key encryption algorithm, now we transmit the decruption key of the cipher key pair of stochastic generation.Because symmetric encipherment algorithm is simpler and easy than public key encryption algorithm, performance is higher, when using NFC mode transmission security key substantially can ensure not to be stolen, the symmetric encipherment algorithm that the same random key of choice for use encrypts and decrypts is ideal, and therefore we can select wherein comparatively general aes algorithm to be encrypted the data that will transmit.
This method is abandoned at Bluetooth transmission layer by the protection to transmission data security of the security mechanism of the agreements such as SDP; and transmit key by secured fashion; in the fail safe of application layer service data; avoid PIN password generate, user confirm join equivalent process; when security purpose can be reached equally; Consumer's Experience can be promoted further, can reduce simultaneously two equipment connection processes of setting up to transmission bring consuming time.Because NFC is designed to have extremely short operating distance (about 10cm), and with Bluetooth communication not in identical frequency band, the PIN password of this band outer transmission means exchange stochastic generation or application layer encryption key is used to be very safe.Third-party equipment cannot get on so short distance and at the frequency band of lower frequency to eavesdrop and intercept and capture the key transmitted, and will greatly improve the fail safe of transfer of data like this.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.