As a communication technology, 4G provides services for realizing telematics in a broad sense. As computers and various smart devices with processing functions are increasingly used in various fields, the application scope of data communications is also expanding. In the field of Internet of Things, 4G is an important technical means for mobile devices to achieve network access.
4G DTU transmission distance
4G communication technology is also called the fourth generation mobile communication technology. 4G mobile communication technology has many advantages, mainly reflected in the following aspects: strong coverage capability, fast data transmission rate, strong anti-interference ability, Good compatibility.
Because 4G is a wireless communication technology, theoretically, there is no limit to the transmission distance of 4G DTU . As long as there is a 4G network, 4G DTU can be used for data transmission. However, some external factors will also affect the transmission distance of 4G DTU, such as whether there is electromagnetic interference signal in the use environment, whether the device antenna matches and is connected correctly, whether the device power supply is good, etc.
In fact, there are many factors that affect the transmission distance of 4G DTU, some visible and some invisible. In short, we need to pay attention to many aspects when using it.
How 4G DTU works
After the 4G DTU is powered on, it first reads out the working parameters saved in the internal FLASH (including dial-up parameters, serial port baud rate, data center IP address, etc., which have been configured in advance).
Then, the 4G DTU initiates a TCP or UDP communication request to the data center through parameters such as the data center’s IP address and port number. After getting the response from the center, the 4G DTU considers that the handshake with the center is successful, and then keeps the communication connection existing. If the communication connection is interrupted, the 4G DTU will immediately re-handshake with the center.
For 4G DTU, as long as two-way communication with the data center is established, it is relatively simple to complete the conversion of user serial port data and 4G network data packets. Once the user’s serial port data is received, 4G DTU immediately encapsulates the serial port data in a TCP/UDP packet and sends it to the data center. On the contrary, when the 4G DTU receives the TCP/UDP packet from the data center, it takes out the data content and immediately sends it to the user device through the serial port.