The Role of lte Modems

PublishTime： 2023-10-02 Article Source：usr News

LTE modem hardware components:

The hardware of the LTE modem includes a CPU control module, wireless communication module, and power module.

LTE modem software components:

The software components of LTE modem mainly include: supporting TCP/UDP protocol stack, supporting standard AT command interface, supporting telnet function, supporting remote configuration, remote control, supporting LINUX, UNIX, WINDOWS systems, and other functions.

What is the use of the LTE modem module?

1, support automatic heartbeat, always keep the online status

One of the advantages of the 4G communication network is to support a persistent presence of 4G terminal devices, so a typical LTE modem is modified to support a persistent presence function. To do this, heartbeat packets must be used (if there is no data communication for a long time, the mobile gateway will disconnect the LTE modem from the center, including automatic dialing after the LTE modem is powered on) to maintain a persistent connection. The LTE modem and data center will send a small data packet to prevent disconnection before disconnection and support automatic reconnection, automatic redialing, and other functions after disconnection.

2. Internal integrated TCP/IP protocol stack

LTE modem encapsulates the PPP dial-up protocol and TCP/IP protocol stack and has an embedded operating system. From the point of view of the project, it can be regarded as a combination of embedded PC and wireless 4G modem, with GPRS dial-up networking and TCP/IP data communication functions.

3. Parameter configuration support, permanent storage

As one of the communication devices, the LTE modem has a wide range of applications. Datacenter IP addresses, port numbers, serial port baud rates, etc., vary by application. Therefore, all LTE modems support parameter configuration, and the configured parameters must be stored in an internal persistent storage device (typically FLASH or EEPROM). After the power is turned on, it will act automatically according to the set parameters.

4. Provide bidirectional conversion function of serial data

LTE modems provide serial communication interfaces, including common serial communication methods (RS232, RS485, RS422, etc.). Most LTE modems revise the serial port data to the "transparent translation" method. That is, the LTE modem can convert the original data on the serial port into TCP/IP packets for transmission without changing the original data communication content. Therefore, serial communication can be used to connect the LTE modem to a variety of user devices without changing the user devices.

LTE modem has been widely used in power engineering, water conservancy, environmental protection, climate, transportation, freight logistics, industrial production, and other industries. It provides assistance for the integration of information and industrial chains among various industries and gradually develops into a key technology for the application of the Internet of Things.

LTE modem has the following values in IoT applications:

Connectivity and stability: LTE modem provides a reliable wireless connection, which can connect IOT devices to the network to realize data transmission and communication. Compared with other wireless technologies, the 4G network has a wider coverage and more stable connection, which is suitable for various environments and scenarios.

Flexible deployment: because the LTE modem does not need to rely on a wired network, it can be flexibly deployed on devices that require monitoring or remote management, including mobile devices, remote sites, remote areas, and so on. This makes it easy to collect, control, and manage data from distributed devices.

Real-time data transmission and response capability: The LTE modem provides fast data transmission speed and low latency over the 4G network, enabling real-time data transmission and response. This is very important for applications that require timely monitoring and control, such as intelligent transportation, smart grid, industrial automation, and other fields.

High security and privacy protection: LTE modem supports encrypted communication and security protocols, which can protect the security of transmitted data and ensure that the user's privacy is protected. This is very important for the transmission and protection of some sensitive data, such as Internet of Things applications in financial, medical, and other fields.

Remote monitoring and management: through the LTE modem, the user can remotely monitor and manage various IOT devices, including device status monitoring, remote configuration, firmware upgrade, etc. This greatly improves the efficiency and convenience of equipment management and reduces the cost of on-site operation and maintenance.

Compatibility and scalability: LTE modems typically support multiple communication protocols and interfaces to connect and communicate with different types of IoT devices. At the same time, it also has strong scalability, which can adapt to the growing equipment size and communication needs.

LTE modem has the value of connectivity and stability, flexible deployment, real-time data transmission and responsiveness, high security, and privacy protection, remote monitoring and management, compatibility and scalability in the Internet of Things applications, which provides important technical support for the realization of reliable, efficient and secure Internet of Things communication.

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