Abstract:
A method of access to a motor vehicle includes establishing contactless communication according to an NFC protocol between a badge of the motor vehicle and a smartphone, communicating an authentication key from the badge to the smartphone, transmitting the authentication key of the smartphone to a server by telephone communication, the server being capable of communicating with the vehicle, and recognizing the authentication key by the server and transmitting data concerning a status of the vehicle from the server to the smartphone.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to the field of accessing a vehicle and information on said vehicle by means of a telephone of the smartphone type, and is more particularly concerned with protected access to the vehicle and to the vehicle data. 
       PRIOR ART 
       [0002]    The multiple functions of mobile phones of the smartphone type have opened up possibilities of communication and connection with motor vehicles, in respect of both physical access to the vehicle and access to data on location and/or operation (state of tires, fuel level, etc.). However, controlling a vehicle by means of a telephone can give rise to security problems, and a number of precautions must be taken for the authentication of the person requesting access via his telephone. 
         [0003]    There is a known way of using a contactless or “hands free” badge for locking and unlocking a vehicle, and also for starting the vehicle, these badges using radio frequency technology. Application FR2700625 filed by the present applicant is an example of this. 
         [0004]    The document FR2965434 also discloses a method of pairing a mobile phone with a vehicle, by means of a locking/unlocking key paired with the vehicle in the factory via the NFC protocol, in order to enable the vehicle to be secured or unlocked by telephone, using the NFC protocol. 
         [0005]    In these cases, however, the user must be located near the vehicle in order to control it, thus limiting the possible uses. 
         [0006]    The present invention proposes a method based on NFC technology using a small card, similar to a bank card, carrying the authentication means, which can be paired with a mobile phone to enable services to be provided for the remote control of the vehicle, in other words without the vehicle being near the telephone, as well as different services such as: 
         [0007]    remote maintenance, 
         [0008]    the state of the vehicle, 
         [0009]    geolocation, 
         [0010]    control of openable body sections, 
         [0011]    conditioning the vehicle, including air 
         [0000]    conditioning adjustment, seat adjustment, and radio pre-setting, 
         [0012]    engine starting, 
         [0013]    opening and closing in accordance with rules of security and ownership, etc. 
       DISCLOSURE OF THE INVENTION 
       [0014]    The present invention is based on a method of access to a motor vehicle, characterized in that it comprises the following steps: 
         [0015]    establishing contactless communication according to the NFC protocol between a badge of the motor vehicle and a smartphone, 
         [0016]    communicating an authentication key from the badge to the smartphone, 
         [0017]    transmitting the authentication key of the smartphone to a server by telephone communication, the server being capable of communicating with the vehicle, 
         [0018]    recognizing the authentication key by means of the server, and transmitting data concerning the status of the vehicle from the server to the smartphone. 
         [0019]    Advantageously, the present invention proposes at least one of the following characteristics:
       the data on the state of the vehicle comprise at least one of the following data: the mileage, the various liquid levels in the reservoirs, and the state of charge of the starting, lighting and ignition battery, and of the traction battery if the vehicle is an electric or hybrid vehicle,   the method comprises a step of supplementary authentication by the user of the smartphone for the purpose of accessing operating data of the vehicle,   the operating data of the vehicle comprise the geolocation of the vehicle and/or the locked/unlocked state of the vehicle,   the method comprises a step of transmitting a change of state of the operation of the vehicle from the smartphone to the server, which forwards the changes of state to the vehicle computer, which then modifies the elements in question,   the change of state of the operation of the vehicle is at least one of the following changes:
           A change in the customization data for the interior arrangements   Modification of data concerning the telephone directory and the radio pre-setting   A change in the locked/unlocked state of the vehicle   Modification of the operation of the air conditioning/heating of the passenger compartment   A change of state in the engine operation: started/stopped   A change of state of the steering lock devices   
               
 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0031]    Other characteristics and advantages of the invention will be evident from the following description, which is purely illustrative and non-limiting and is to be read with reference to the attached drawings, in which: 
           [0032]      FIG. 1  is a diagram of the principle of protection and exchange according to the invention, 
           [0033]      FIGS. 2 a , 2 b , 2 c , and 2 d    show an exemplary embodiment of the invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0034]    The present invention proposes the use of the NFC technology and protocol in a badge  2  having a compact format, of the bank card type, said badge allowing direct access to the vehicle  4 , as is known in the field. According to the invention, the badge also contains an authentication key, in the form of the VIN (for “Vehicle Identification Number”) code of the vehicle, this unique code being given to each vehicle and being shown on the vehicle chassis. This unique code can be used to protect the identification of a potential user, who is then recognized as the owner of a “key” and can therefore interact with the vehicle via an application on his smartphone. This VIN code is used for remote access to a server  6 . This access is provided by a mobile phone or smartphone  8  which also uses NFC technology. The VIN code cannot be read directly by a smartphone, but can be decoded by a dedicated server which has the key for reading the VIN code. 
         [0035]    The server  6  can also communicate with the vehicle  4  by any known technology, notably via any available networks based on the 2G/3G rules. The link is of the protected http type. Firewalls can be used to increase the protection of exchanges between the car and the server. 
         [0036]    Thus, according to the invention, the badge  2  is a physical object which can be used to keep control of the vehicle. It is, notably, impossible to start the vehicle without this badge. However, the smartphone can be used to create a protected gateway for accessing the vehicle data and can act as the equivalent of the badge, but in a remote way. 
         [0037]    Thus an inexpensive card is used to protect the authentication of the smartphone  8 , allowing remote access to the vehicle  4  via the smartphone and a remote server  6 . A special application must be loaded into the smartphone  8  in advance for access to the server  6  and for displaying the various items of data and adjustments. 
         [0038]    To increase the protection of the access to the vehicle and its data, two access levels may be provided, after the pairing between the badge  2  and the smartphone  8  has been completed: 
         [0039]    one without a code for all information concerning the data on the state of the vehicle (pressure, levels, etc.) 
         [0040]    the other with a PIN code, concerning more confidential information on the operation of the vehicle such as the location of the vehicle, opening/closing, starting, etc., which could be remotely launched (to allow a person to enter the car, etc.). 
         [0041]    Thus an embodiment of the invention can follow the sequence of steps shown in  FIGS. 2 a    to  2   d:    
         [0042]    Physical presence of the badge  2  and the smartphone  8  required ( FIG. 2 a   ), after an application specific to the envisaged data access has been loaded into the smartphone, 
         [0043]    Pairing of the smartphone  8  and the badge  2 , for example by pressing one against the other ( FIG. 2 b   ), the NFC technology requiring that both elements to be paired be very close to one another, 
         [0044]    Automatic launch of the special program with telephone connection to the server  6 , recognition by the server of the authentication key (VIN code of the vehicle) transmitted by the badge  2  during pairing with the smartphone  8 , and transmission of a first batch  10  of data a, b, c to the smartphone  8  which displays them by means of the program ( FIG. 2 c   ). 
         [0045]    In fact, the motor vehicle  4  comprises, notably, a computer capable of transmitting data on the state, position and customization of the vehicle to the server  6 , and capable of receiving, from said server, operating commands and instructions via appropriate telephone networks. 
         [0046]    This first batch of data is concerned with data considered to be non-confidential for the vehicle owner, such as the mileage, the fuel level or the charge level for an electric vehicle, the temperature, and, more generally, the condition of the vehicle (tire pressure, liquid levels, state of wear, etc.). 
         [0047]    At a second stage, for more advanced protected functions concerned with the operation of the vehicle, and notably for the remote control of certain functions of the vehicle, a code  12  must be entered on the smartphone  8  for the functions shown below, although this list is not exhaustive:
       Geolocation of the vehicle   Starting and stopping the engine   Air conditioning   Opening/closing of the vehicle   Adjustment of seat positions, radio, telephone directory, etc.       
 
         [0053]    The server  6  can then communicate a second batch  14  of data d, e, f, and, if the user so wishes, can use the privileged link with the vehicle to act on the latter to pre-adjust seat positions, the driving position, radio stations and an electronic diary, or to pre-heat the interior of the passenger compartment or lock/unlock access to the vehicle for a person located in the proximity thereof. 
         [0054]    Thanks to the present invention, it is then possible to simply control not only the opening and closing of a user&#39;s vehicle at a distance out of the range of direct wireless links (about a hundred meters) but also the starting of the vehicle&#39;s engine and the unlocking of all the anti-theft devices (notably the steering column lock). 
         [0055]    The present invention is very simple to use, since the simple pairing of the badge with the smartphone allow the identification and validation of the server which thus enables data exchange and interaction to take place remotely and out of the range of conventional devices. The solution also has increased security, since the badge must be pressed against the smartphone for the purpose of identification. 
         [0056]    It would be feasible to provide a plurality of badges  2  carrying the VIN data and the NFC protocol, with the option of customizing each badge, or even to restrict access to certain functions (notably the starting of the vehicle, but also the limiting of the maximum speed, for example).