LED-based mobile terminal for short-distance point-to-point high-speed bidirectional data transmission

Abstract

The invention relates to an LED-based mobile terminal for short-distance point-to-point high-speed bidirectional data transmission. The mobile terminal comprises: a bidirectional data communication module, for sending and receiving LED optical signals; a main control module, for starting and controlling a communication process of receiving and sending data through the LED optical signals; and a data storage module, for storing received and sent data, wherein the bidirectional data communication module comprises a physical layer device, an MAC layer device and a data bus; and the physical layer device comprises an LED optical signal sending end, a receiving end and a power source. The mobile terminal provided by the invention can achieve bidirectional point-to-point short-distance high-speed data transmission, and can achieve high-speed data transmission of which the actual transmission bit rate is 100Mbps or above in a short-distance range of 1-10cm.

Description

technical field [0001] The invention belongs to the technical field of LED visible light wireless communication, in particular to an LED-based short-distance point-to-point high-speed bidirectional data transmission mobile terminal. Background technique [0002] In 1880, American scientist Bell conducted an experiment with the optical telephone he invented, and the communication distance reached 200 meters. The success of this experiment opened up early ideas for the use of visible light for information transmission. The visible light used in the lighting field to realize the visible light communication system of voice and data services has been gradually formed along with the large-scale lighting application of white LED lamps in the past 20 years. With the rapid development of the economy, people's urgent needs for energy supply and high-speed real-time information services are increasing; on the one hand, LED lights are safe and efficient, green, low power consumption, lo...

AI Technical Summary

Problems solved by technology

The first type is wired transmission. In the case of wired transmission to achieve big data sharing, whether it is transmitted through USB or through a wired network port, there are problems: the cable is not convenient to carry, and it can only be transmitted through the LAN, which may easily cause information loss. Leakage, point-to-point transmission needs to go through two or more copies and forwarding, USB and other interfaces have very low transfer rates for G-bit-level large files and large data, and many other problems and limitations

The second category is wireless transmission. As mentioned in the first paragraph of the background technology section, short-distance wireless information transmission technologies mainly include Bluetooth, Wi-Fi LAN, RFID radio frequency, UWB ultra-wideband, ZIGBEE wireless sensor, etc. These technologies are all microwave Or radio frequency communication, which has many disadvantages: high cost for merchants and users, difficult installation of forwarding equipment, need to use radio waves to cause electromagnetic radiation, poor information security performance, low data transmission rate, Wi-Fi wireless LAN requires traffic fees, etc.

Due to the large screen of the current mobile terminal, the brightness power used for display is small, and the low-power display of the LED screen has serious light scattering interference, and it is difficult to quickly distinguish the level of brightness changes. Therefore, this method can be used in In the case of low-bit-rate information interaction such as mobile payment and mobile phone pairing, it is difficult to distinguish the actual high-speed receiving signal under the light intensity modulation of the quasi-fiber communication rate of more than 100 Mbits, and it is impossible to achieve short-distance G bit rate high-speed visible light. wireless data transmission

Images