4G refers to the fourth generation of cellular communication technology, which replaces the Global System for Mobile Communications (GSM) and High Speed Packet Access (HSPA) standards. Because it is entirely IP-based, it greatly increases data throughput and reduces latency on 2G and 3G networks. Power module Since 4G is IP-based, it no longer supports circuit-switched network nodes, so base stations only need to support IP traffic, which means that all 4G voice traffic is sent over the IP infrastructure.
Like 3G, all the advantages of 2G and 3G systems have been incorporated into 4G networks to provide enhanced services and support legacy applications such as SMS.
4G spectrum operates similarly to 2G and 3G, with different regions supported by different frequency bands, but the number of frequency bands and regions is very different compared to 2G and 3G.
4G defines 44 frequency bands, 13 of which are defined as Time Division Duplex (TDD) and 31 as Frequency Division Duplex (FDD). The difference between the two standards is how they use the shared spectrum to transmit and receive data.
TDD uses a frequency carrier to send and receive data, but at different times. FDD uses two different frequencies to send and receive data, but can send data at the same time.
The 4G industrial router adopts industrial-grade 4G wireless modules and high-precision components, which can adapt to various high-temperature and low-temperature operating environments, and provide reliable support for unattended system networking and secure communication. Such high performance makes many people curious about the effective range of wireless transmission of industrial cellular routers.
Many people do not know the transmission range of industrial cellular routers. serial rs232 to wifi converter
The wireless network signals of general industrial cellular routers are described in the manual. The effective transmission distance is 100 meters to 250 meters, which can easily lead to false belief that the signal can be received within this transmission range.