Method of communication between a base station and a motor vehicle, motor vehicle and associated system.

Abstract

A communication method between a base station (201) of a mobile telephone network (200) and a motor vehicle (100), implemented in the base station (201), characterized in that it comprises the following steps: First radio frequency reception of a message from the vehicle (100) including a first requested communication data rate and a first requested quality of service indicator; then, search, from a list of radio frequency modulations (211), for a first radio frequency modulation based on the first requested communication data rate and first quality of service indicator; then, second radio frequency transmission of second data to the motor vehicle (100) according to the first radio frequency modulation; third radio frequency reception of third data from the vehicle (100) according to the first radio frequency modulation. Figure for the abstract: Figure 1

Description

Title of the invention: Method of communication between a base station and a motor vehicle, motor vehicle and associated system.

[0001] The invention relates to radio frequency communication between a base station of a mobile telephone network and a motor vehicle. Such communication allows, for example, the motor vehicle to exchange data with a remote device via the mobile telephone network.

[0002] To implement this communication, the base station currently selects, from among several possible radio frequency modulations, a modulation based on the level of a radio frequency communication signal between the base station and the motor vehicle. The higher the signal level, the higher the data rate of the modulation chosen by the station and the lower the quality of service of the chosen modulation.

[0003] There is a need to increase the reliability and quality of communications between the base station and the vehicle, and / or to reduce the costs of this communication.

[0004] To this end, the invention relates to a method of communication between a base station of a mobile telephone network and a motor vehicle, implemented in (in other words: by) the base station, characterized in that it comprises the following steps: - First radio frequency reception of a message from the vehicle including a first (minimum) communication data rate requested and a first quality of service indicator requested, then - Search (in other words: determination), from a list of radio frequency modulations (for example stored in the base station's memory), for a first radio frequency modulation based on the first communication rate and the first quality of service indicator requested, then - Second radio frequency transmission of second data to the motor vehicle according to the first radio frequency modulation, third radio frequency reception of third data from the vehicle according to the first radio frequency modulation.

[0005] Thus, the invention makes it possible to choose the first modulation that is most suitable for the needs of the vehicle, in terms of communication rate and in terms of quality of service required by the motor vehicle, when communicating with the remote device.

[0006] According to one embodiment, the process may further comprise the following steps, implemented by the motor vehicle: - Second radio frequency reception of the second data from the base station according to the first radio frequency modulation, third radio frequency transmission of the third data to the base station according to the first radio frequency modulation.

[0007] The modulation defines the signal carrying the data during the communication of the second and third data.

[0008] The telecommunications network is, for example, a so-called “4G” or “5G” network.

[0009] According to one embodiment, the reception and search steps are implemented during the initialization of a communication session between the vehicle and the mobile telephone network (and the method according to the invention may include this initialization step). For example, the first modulation is communicated by the base station to the motor vehicle.

[0010] For example, the list of radio frequency modulations includes the following modulations: - Phase-change modulation, and - A quadrature amplitude modulation comprising a constellation of 16 points, and - A quadrature amplitude modulation comprising a constellation of 64 points, and - A quadrature amplitude modulation comprising a constellation of 256 points.

[0011] For example, the first quality of service indicator requested is a first bit error rate (when modulation is used to communicate).

[0012] Alternatively, the first quality of service indicator is a communication latency time.

[0013] According to one embodiment, the modulation list comprising, for each modulation in the modulation list, a second (average) bit error rate (for example equal to the number of erroneous bits in the data exchanged during the communication divided by the total number of bits exchanged during the communication) and a second communication rate (for example, in megabits per second), the search step comprising at least a first comparison step between the first rate and the second rate of a modulation and at least a second comparison step between the first error rate and the second error rate of a modulation.

[0014] According to one embodiment, the list also includes second modulations having a second flow rate higher than the first flow rate and a second rate error rate lower than the first error rate, or third modulations having a second rate higher than the first rate, the first modulation is a modulation, in the list, having a minimum second rate among the second modulations, if such modulations exist, otherwise, a modulation having a maximum second rate among the third modulations.

[0015] We thus prioritize the quality of service, which may be essential, over the bandwidth which will only significantly degrade the customer experience.

[0016] Alternatively: - The first modulation is a modulation that has a second maximum error rate among the modulations that have a second error rate lower than the first error rate, or - The first modulation is a modulation that has a second minimum rate among the modulations that have a second rate greater than the first error rate.

[0017] For example, the application exchanges data with the remote device via the mobile phone network.

[0018] The invention also relates to a computer program comprising instructions, executable by a microprocessor or a microcontroller or a computer, to implement the steps of the process according to the invention, when executed by the microprocessor or the microcontroller or the computer.

[0019] The method according to the invention can be implemented by base station.

[0020] The invention also relates to the base station configured to implement the steps of the process according to the invention.

[0021] The invention also relates to a radio frequency communication system characterized in that it comprises the base station according to the invention and a motor vehicle configured to implement the following steps: - First radio frequency transmission of the message including the first requested (minimum) communication rate and the first requested quality of service indicator, destined for the base station, then - Second radio frequency reception of the second data from the base station according to the first radio frequency modulation, and third radio frequency transmission of the third data to the base station according to the first radio frequency modulation.

[0022] According to one embodiment, the vehicle comprising a software application and a mobile telephony radio frequency communication module, the vehicle is configured to implement the following steps: - Determination (for example, by reading from memory or by calculation), by the application, of the first (minimum) communication rate requested and the first quality of service indicator requested, then - Transmission, by the application, of the first (minimum) communication rate requested and the first quality of service indicator requested to the communication module, the first transmission, second reception and third transmission steps being implemented by the communication module.

[0023] For example, the application receives the second data from the communication module and sends the third data to the communication module.

[0024] The characteristics and advantages of the base station, or of the computer program and system are identical to those of the method, therefore they are not repeated here.

[0025] A base station, motor vehicle, communication module, application, or other element is considered "configured to" (or "suitable to") perform or implement a step or operation by the fact that the element includes means to (in other words, "is designed to" or "is adapted to") perform the step or operation. These means are preferably electronic, for example, a computer program, data in memory, specialized electronic circuits, wired or wireless connections, a microprocessor, and / or a microcontroller.

[0026] When a step or operation is performed (in other words: implemented) by such an element, this generally implies that the element has means for (in other words, "is designed for" or "is adapted for" or "is configured for") performing the step or operation. These means may include, for example, electronic means, such as a computer program, data in memory, specialized electronic circuits, wired or wireless connections, a microprocessor, and / or a microcontroller.

[0027] Other features and advantages of the present invention will become more apparent from the following detailed description, which includes embodiments of the invention given by way of non-limiting examples and illustrated by the accompanying drawings, in which.

[0028] [Fig-1] represents a base station and an electronic system according to a mode of realization of the invention.

[0029] [Fig.2] represents an implementation of the process according to the invention, according to a first embodiment, by the electronic device and the system of [Fig.1].

[0030] In [Fig. 1], certain elements are, of course, visible through the transparent material.

[0031] Detailed description of an example embodiment of the invention.

[0032] With reference to Figures 1 and 2, in step S00, a motor vehicle 100 is in motion. The motor vehicle includes, on its roof, a mobile telephony radio frequency communication module 120 connected to an electronic device 110 (which may, for example, have the architecture of a microprocessor or a microcontroller) of the vehicle 100.

[0033] At step S10, the software application 111, in the memory of the electronic device 110, is executed by the electronic device 110, and during this execution, the application 111 determines that a communication rate of 190 megabits per second and an error rate of 3.8 x 10⁶ is necessary to communicate with the remote device on the mobile telephone network 200. For example, the communication rate and the error rate can be read from the memory of the electronic device 110.

[0034] At step S20, the software application 111 transmits the communication rate and error rate to the communication module 120.

[0035] At step S30, during an initialization step of a communication session between the vehicle 100 (or more precisely, the application 111) and the mobile telephone network 200 (connected to the remote device) or a base station 201 of the mobile telephone network, the communication module 120 transmits the communication rate and the error rate to the base station 201.

[0036] Telecommunication network 200 is for example a so-called “4G” or “5G” network.

[0037] At step S40, base station 201 receives the communication data rate and the rate error.

[0038] At step S50, the microprocessor 210 searches, among the list of radio frequency modulations 211 that it stores, represented in table 1 (table 1 indicates error rates and fictitious communication rates, as examples, illustrating the invention), for a radio frequency modulation based on communication rate and error rate. [Tables 1] Modulation Binary Error Rate Communication Rate (1) Phase-change modulation 10⁶ 50 Quadrature amplitude modulation comprising a constellation of 16 points 2 x 10⁶ 100 Quadrature amplitude modulation comprising a constellation of 64 points 3 x 10⁶ 200 Quadrature amplitude modulation comprising a constellation of 256 points 4 x 10⁶ 800 1. : in megabits per second

[0039] During step S50, the microprocessor 211 compares the communication rate and error rate with those of the modulations in list 211. For example, the processor chooses a quadrature amplitude modulation comprising a constellation of 64 points which is the modulation having the minimum rate among the modulations having a rate greater than 190 megabits per second and having an error rate less than 3.8.106.

[0040] Note that if the error rate chosen by application 111 had been 2.8 x 10⁶, there would be no modulation with a minimum bit rate greater than 190 megabits per second and an error rate less than 2.8 x 10⁶. The chosen modulation would have been quadrature amplitude modulation comprising a constellation of 16 points, which is the modulation with the maximum bit rate among the modulations with an error rate less than 2.8 x 10⁶.

[0041] At step 50, base station 201 can also communicate (an identifier of) quadrature amplitude modulation comprising a constellation of 64 points to communication module 120.

[0042] At step S60, base station 201 transmits second data (from the remote device) to communication module 120, using the modulation chosen at step S50.

[0043] At step S70, base station 201 receives third data from communication module 120, from application 111, using the modulation chosen at step S50.

Claims

1. Demands A method of communication between a base station (201) of a mobile telephone network (200) and a motor vehicle (100), implemented in the base station (201), characterized in that it comprises the following steps: - First radio frequency reception (S40) of a message from vehicle (100) including an initial requested communication bitrate and an initial requested quality of service indicator, then - Search (S50) among a list of radio frequency modulations (211), for a first radio frequency modulation based on the first requested communication rate and the first requested quality of service indicator, then - Second radio frequency transmission (S60) of second data to the motor vehicle (100) according to the first radio frequency modulation, and third radio frequency reception (S70) of third data from the vehicle (100) according to the first radio frequency modulation, in that the first quality of service indicator requested is a first bit error rate, and in that the modulation list includes, for each modulation in the modulation list (211), a second bit error rate and a second communication rate, the search step including at least a first comparison step between the first rate and the second rate and at least a second comparison step between the first error rate and the second error rate, the list including second modulations having a second rate higher than the first rate and a second error rate lower than the first error rate, or third modulations having a second rate higher than the first rate, the first modulation is a modulation, in the list (211), having a minimum second rate among the second modulations, if such modulations exist, otherwise, a modulation having a maximum second rate among the third modulations.

2. A communication method according to the preceding claim in which the receiving step and the searching step are implemented during the initialization of a communication session between the vehicle (100) and the mobile telephone network (200).

3. A communication method according to any one of the preceding claims wherein the list (211) of radio frequency modulations includes the following modulations: - A phase-change modulation, and - A quadrature amplitude modulation comprising a constellation of 16 points, and - A quadrature amplitude modulation comprising a constellation of 64 points, and - A quadrature amplitude modulation comprising a constellation of 256 points.

4. Computer program comprising instructions, executable by a microprocessor or microcontroller, for carrying out the steps of the process according to any one of claims 1 to 3, when executed by the microprocessor or microcontroller.

5. Base station (201) configured to implement the steps of the process according to any one of claims 1 or 3.

6. Radio frequency communication system characterized in that it comprises the base station (201) according to claim 5 and a motor vehicle (100) configured to carry out the following steps: - First radio frequency transmission (S30) of the message to the base station (201), - Second radio frequency reception of the second data from the base station (201) according to the first radio frequency modulation, and third radio frequency transmission of the third data to the base station (201) according to the first radio frequency modulation.

7. Radio frequency communication system according to the preceding claim, the vehicle comprising a software application (111) and a mobile telephony radio frequency communication module (120), wherein the vehicle (100) is configured to implement the following steps: - The application determines the initial requested communication data rate and the initial requested quality of service indicator. - Transmission, by applying the first requested communication rate and the first requested quality of service indicator to the communication module (120), the first transmission, second reception and third transmission steps being implemented by the communication module (120).

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