Features and Advantages of Lte Cat 4

The communication between the Lte cat 4 and the server is performed by the Lte cat 4 side (client). The server did not respond to the Lte cat 4 based on the feedback sent back, or the communication was accepted. The Lte cat 4 end and the server end form an application system of network communication based on 4G communication and Internet technology. Compared with the Lte cat 4 terminal device, the network server terminal device is equipped with a more complex mobile phone application program, which can accept all communication requests sent by the Lte cat 4 terminal device and check the communication status of the link anytime and anywhere, thus realizing the application of instant data collection and database services.

The Lte cat 4 needs to know the IP address and port number of the server before it can initiate a communication request. Once communication is established, there is no difference between the server and the Lte cat 4.

The IP address of the server may be a public network IP (fixed IP) or a dynamic domain name obtained through a domain name resolution server.

The port number of the server generally matches the particular mobile application running in the server. For example, the FTP service project uses the port number TCP 21, and the Dynamic Web Server (Http) uses the port number TCP 80. That is, server-side mobile applications are suitable for pushing and receiving data based on a particular server port.

The IP address obtained by the Lte cat 4 terminal is the internal network IP address randomly assigned by the network operator, and the Internet network can be accessed through the gateway of the mobile operator. It should be noted that the time limit of NAT (Network Address Translation) port mapping service is very short, so if it is necessary to maintain two-way communication, 4G-Lte cat 4 heartbeat packets sent at regular intervals must be set to maintain NAT port mapping.

Lte Cat 4 Features

Connection mode: support 4G, and backward compatible with 2G and 3G networks

Transmission mode: transparent data transmission, configuration software protocol

Transmission protocol: support TCP, UDP, MQTT, AT command control

Data center: support dynamic domain name and fixed IP address access, multi-backup data center

Efficient: Cache function to ensure no data loss

Flexible: support real-time online, support SMS, telephone, serial data and other remote wake-up mode

Manageable: Lte cat 4 can be remotely configured and queried via SMS

Easy maintenance: support local firmware upgrade

Four Core Functions of Lte Cat 4

Internally Integrated TCP/IP Stack

The Lte cat 4 encapsulates the PPP dial-up protocol and the TCP/IP protocol stack, and has an embedded operating system. From the hardware, it can be seen as a combination of embedded PC and wireless 4G MODEM. It has the functions of 4G dial-up Internet access and TCP/IP data communication.

Provide Bidirectional Conversion Function of Serial Port Data

Lte cat 4 provides serial communication interfaces, including RS232, RS485, RS422 and so on, which are commonly used serial communication modes. However, the design of Lte cat 4 mostly changes the serial data into a "transparent transmission" mode, that is to say, Lte cat 4 can convert the original data on the serial port into TCP/IP data packets for transmission. The content of the original data communication is not changed.Therefore, the Lte cat 4 can be connected with various user equipment through serial communication without modifying the user equipment. The transmission process is greatly facilitated, and complex protocol conversion is not needed.

Support Automatic Heartbeat, Always Online

One of the advantages of Lte cat 4 devices is that they support 4G terminal devices that are always online. As a result, a typical Lte cat 4 is designed to support always-on functionality. This requires the Lte cat 4 to be permanently online with power-on automatic dialing and heartbeat packets (when there is no data communication for a long time, the mobile gateway will disconnect the Lte cat 4 from the center).Heartbeat packets are kept connected by the Lte cat 4 until it is disconnected from the data center.) Equipped with watchdog technology, double protection equipment, automatic reconnection when the equipment is disconnected, automatic redial and other functions.

Support Parameter Configuration and Permanent Storage

As a kind of communication equipment, Lte cat 4 has a wide range of applications. In different applications, the IP address and port number of the data center and the baud rate of the serial port are different. Therefore, the Lte cat 4 shall support parameter configuration and save the configured parameters in an internal permanent storage device (usually FLASH or EEPROM, etc.). Once powered on, it will automatically work according to the set parameters.

The Advantages of Industrial Lte Cat 4 Are as Follow

In remote mountainous areas, the traditional GPRS network signal is not strong or weak, while the 4G network signal is better than GPRS in most places.

If there is a single-mode single-frequency Lte cat 4 in the local area network to deal with the network exception, there is no local area network in the local area network, such as the GPRS module data transmission will be directly disconnected, and 4G all Netcom Lte cat 4, if there is a bad lan in the lan, will automatically switch to other frequency bands, to provide users with continuous data transmission!

Adopt 4G all Netcom Lte cat 4 smart meter collection, remote meter reading, can directly collect data on the meter or water meter, and actively upload to the user server.

Using 4G Netcom intelligent charging pile technology, the detected charging pile data can be sent to the server, cloud platform and so on in real time.

The 4G all-netcom Lte cat 4 can be used not only in the above situations, but also in the monitoring of mountain torrents/floods, on-site dust monitoring systems, automatic payment inquiry terminals, public transport wireless networking, industrial control fields, traffic management, environmental monitoring, meteorology, water conservancy, coal mines, and so on.