OA19933A - Technological method of access of a peripheral to a LIFI network. - Google Patents

Abstract

The invention relates to a technological method which allows direct access of a peripheral (2) to a Li-Fi network without the use of a lifi key or dongle and even less of a box. This technology is implemented via the internal equipment of the peripheral (2) (camera, camera, infrared, bluetooth), via a “LIFIConnect” application. All of this electronic device allows a bidirectional application of the LI-FI signal and gives the connected device (2) various functionalities such as the TV application, the display of content with or without internet, data management and flat rate. internet as well as advertising.

Description

DESCRIPTION OF THE INVENTION

Technological method of access of a peripheral to a LIFI network

The invention relates to a technological method developed to allow a peripheral to connect directly to an LI-FI network without the use of a lifi key or dongle or box.

The method according to the invention is a technology for implementing LI-FI which allows a mobile phone, a computer, a smart-TV or even any other terminal to connect directly to a LI-FI network.

Li-Fi by definition Light Fidelity (in English), is a wireless communication technology based on the use of visible or optical light of the electromagnetic spectrum, with a wavelength between 480 nm (i.e. 670 THz, blue -vert) and 650 nm (i.e. 460 THz, orange-red) as a vector or channel to transport information. Li-Fi is an international standard adopted worldwide since 2011, it emits no radio waves, and thus meets environmental protection standards.

The principle of Li-Fi is based on the encoding and sending of data via the amplitude modulation of the light sources (scintillation imperceptible to the eye), according to a well-defined and standardized protocol. It is a form of visual light communication that uses light waves from LED or LED bulbs for high speed wireless communication. It is used to exchange data quickly and securely at a much lower power level compared to Wi-Fi.

Concretely, Li-Fi works thanks to the lighting of LED bulbs which have an adjustable light intensity. It allows, subject to being located near this light source, to connect mobile devices and connected objects to each other, in particular to transmit data (photos, files, etc.) to an electronic device. It operates according to a type of VLC (Visible Light Communication) system. Li-Fi differs from communication by laser, optical fiber and IrDa by its protocol layers which are suitable for wireless communications up to ten meters.

[2]

It was 1880 that Alexander Graham Bell, known for the invention of the telephone, made the first demonstration of optical communication by exhibiting his photophone capable of transmitting sound over several hundred meters using sunlight. It was the first wireless communication technique developed, long before the appearance of radio communications which will put the photophone into oblivion.

The development of Li-Fi is strongly correlated with the development of light-emitting diodes or LEDs since they are the only sources of light (along with lasers) to have very fast switching capacities of up to a billion times per second.

Trials to domesticate LI-FI really began in 2005, in Japan and France, with the first experiments in Li-Fi communications using luminaires. The pioneers in this field are researchers from Keiô University in Tokyo, the University of Edinburgh and those of the University of Versailles-Saint-Quentin-en-Yvelines.

Overall, the mechanism linked to the current operating principle of a LI-FI home network can be summed up in three stages which are as follows:

Sending digital information to the electrical network: a computer is connected to the electrical network by an “line powerline” or CPL adapter. The latter allows the computer, while being powered, to send its data directly via the electrical network. The information is superimposed on the 50 Hz electric current by adding a higher frequency signal. Depending on the nature and the volume of the data, evaluated in bytes, the sending is done at low speed by the use of a low bandwidth (texts, images, sounds) or at high speed by a larger bandwidth divided into several sub-channels (Internet connection, videos on demand).

Data can also be sent via a modem or lifi router via a PoE (Power over Ethernet) cable, a network cable transmitting the electrical signal to any device on the network. This is because Power over Ethernet (PoE), or power over Ethernet cable, is the technology that uses RJ45 Ethernet cables to supply power to PoE equipment such as phones and IP cameras at the same time as the transmission. Datas. By ensuring the power supply and the exchange of IP data packets on the same cable, it avoids the installation of a double network (IP and

[3] electric) and thus eliminates all the underlying costs. It then simplifies the administration work.

- Conversion of the electrical signal into light signals: the electrical signal reaches an LED which is also connected to the network via a PLC adapter. Equipped with both an analog and a digital processing system, it converts it into light signals that it emits when it is turned on. In the case of a low speed transmission, these light signals, such as Morse code, are based on a binary system: 0 - off; 1 = on. For high speed (up to 100 Mbit / s, or as much as wi-fi), this is a subtle variation in the intensity of the current flowing through the LED (+/- 30%). In either case, these changes are so rapid (several million times / s for broadband) that they are imperceptible to the naked eye and do not affect the lighting.

Reception and processing of light signals: devices (computer, tablet, phone) located in the lighting zone (a few meters) receive the data transmitted through their Li-Fi receiver. The latter consists of a light signal detector (photodiode), a "trans-impedance" amplifier for conversion into an electrical signal and a signal processing system for demodulating digital data.

Devices can only send information to the lighting device if they have small LEDs or infrared light devices that emit light signals and if the ceiling LED also has a Li-Fi emitter.

This functionality is currently provided by a: the Lifi key or dongle, which captures the light rays from the transmitter, decodes the light signal into an electrical signal and transmits it to the computer which decodes the signal into information understandable by humans , thus granting access to the network to the person using it.

However, long before, this light communication technology, which had existed for several years, only worked in a low-speed and unidirectional version, that is to say, the descent of information from the luminaire to a mobile device without possible feedback to the luminaire: the Li-Fi will continuously emit information which will be received by a device which cannot in turn emit a signal. In this configuration, Visible Light Communication or VLC technology has enabled the deployment of indoor geolocation applications, particularly in the retail sector and in museums and the provision of

[4] of information (cultural mediation, technical sheet of equipment, etc.). This solution replaces the QR code and is inexpensive.

It is therefore the development of the dongle-LI-FI, keystone of the connection mechanism that has enabled the use of the LI-FI network in homes to the point of making it a domestic application, because the router, the transmitter and the LED lamps are of ordinary use and popularized since then. In its operation, the USB access key connected to the laptop or tablet receives the data. And a built-in infrared emitter uses infrared to transmit data to the luminaire in a bidirectional configuration, which allows the LED to communicate with a device which sends information / requests to it in the form of an infrared signal (non-visible light spectrum) . In this way, Li-Fi becomes a real communication technology by modulated LED light which allows data exchange between a specific LED luminaire and a computer, thus making Internet access possible.

For example, the performance of this two-way, high-speed connection has increased fourfold since Startup Lucibel installed a first prototype dongle in June 2015, to now reach 42 Mbps symmetrical. Data from the luminaire is thus received via a Li-Fi USB key, the size of which has been divided by five.

Despite the improvements and performance that it brings to the deployment of the LI-FI network, it should be noted that the LIFI dongle or USB key is an accessory that is still expensive to the point of slowing down or slowing down the expansion or distribution of the network. LIFI in poor countries, especially in Africa and especially in rural areas.

In addition, this accessory can appear bulky with the risk of losing it, misplacing it, forgetting to take it with you, or damaging it.

The present invention aims to contribute to the deployment of LI-FI by otherwise facilitating the connectivity of peripherals to the LI-FI network, by the development of a technology allowing them to connect directly, thus ignoring any intermediate accessory. and any other risk of forgetting, loss or misplacement related to the latter.

This objective is achieved thanks to the development of a technology which makes LED bulbs, a signal transmitter and whose operation is based on sending data by the amplitude modulation of the light sources according to a communication protocol. wireless so

[5] to allow the transmission of data between the internet, computers, smartphones, decoders and others.

This technology is implemented through the device's equipment and resources, such as the camera, camera, beacon, wifi, infrared and Bluetooth. First, these devices serve as an analog sensor or receiver of photons from the surrounding LIFI network. Subsequently, an application integrated into the device, operates a modulation of the camera which transforms the photons into data and finally uses the available resources of the device: infra-red, beacon, wifi, and Bluetooth to transmit the information, ensuring thus a bidirectional application of the LI-FI.

This connection gives the device various functionalities such as the TV application, the display of content with or without internet, the management of digital data and internet package as well as advertising.

The invention in accordance with this LI-FI connectivity technology has many advantages related to its cost and deployment:

- it considerably reduces the cost of deploying the LI-FI network;

- it facilitates the domestic use of the LI-FI network by allowing a direct connection without a dongle and in a box;

- it makes it possible to easily develop the bidirectional version of LIFI;

- it is applicable in both urban and rural areas.

The characteristics will appear clearly on reading the following description which relates to a non-limiting exemplary embodiment, defined by the plate 1 comprising FIG. 1.

LED bulbs (1) serve as a signal transmitter and carry information by amplitude modulation of light sources (3) according to a wireless communication protocol to allow data transmission between internet, computers (2) , smartphones (2), decoders and others (2).

The device's camera and camera (2) serve as an analog sensor or receiver of photons from the surrounding LIFI network represented by the light cone (3). Then, the application integrated into the device (2) modulates the camera. This modulation transforms the photons into data and finally uses again the available resources of the device (2) which are the infra-red, the beacon, the wifi and the Bluetooth to return or return the information given by the device ( 2) to its source.

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The entire device integrated into the peripheral (2) provides a bidirectional application of the LI-FI network and thus allows a connection of the peripheral (2) which gives it various functionalities such as the TV application, the display of content with or without internet, data management and internet package as well as advertising.

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Claims (5)

1- Technological process allowing a peripheral (2) to connect to an LI-FI network characterized in that it gives direct access from the LI-FI network to the peripheral (2) without using an LI-FI key or dongle no box, but thanks to the camera, the camera, the infrared and Bluetooth equipment of the peripheral (2) via a “LIFI-Connect. 2- Technological method allowing a peripheral (2) to connect directly to an LI-FI network according to claim 1, characterized in that the camera and the camera of the peripheral (2) serve as sensor or analog receiver of photons from the LIFI network. 3- Technological method allowing a peripheral (2) to connect directly to an LI-FI network according to claim 1, characterized in that the infrared equipment, and Bluetooth of the peripheral (2) are used to return or return the information given by the peripheral (2) to the network. 4- Technological method allowing a peripheral (2) to connect directly to a LI-FI network according to claims 1 and 2, characterized in that an application, "LIFI-Connect", integrated into the peripheral (2), operates modulation of the camera which transforms photons into data. 5- Technological method allowing a peripheral (2) to connect directly to an LI-FI network according to all the preceding claims, characterized in that it ensures a bidirectional application of the LI-FI signal and thus allows the transmission of data between internet, computers (2), smartphones (2), decoders (2) and others.