wireless internet

Wireless internet transmits data over radio frequencies instead of physical cables, allowing devices to connect to networks through the air. In industrial and commercial settings, this typically means Wi-Fi (IEEE 802.11 standards) for local area networks, or cellular technologies like LTE and 5G for wide area coverage. The actual delivery of internet traffic still uses wired backhaul to the internet backbone, but the last connection to the user's equipment is radio-based.

Wi-Fi operates in unlicensed frequency bands: 2.4 GHz and 5 GHz in most regions, with newer 6 GHz bands emerging. Industrial deployments must account for interference from microwave ovens, cordless phones, and other equipment sharing these bands. Range depends on frequency, transmit power (typically 20 dBm in Wi-Fi access points), antenna design, and obstacles. The 2.4 GHz band penetrates walls better but has only three non-overlapping channels; 5 GHz offers more channels and higher data rates but shorter effective range.

Reliability and industrial use

Factory and warehouse environments present particular challenges for wireless deployment. Metal structures, machinery, and electromagnetic interference from motors and welding equipment create dead zones and signal degradation. Mesh networking and redundant access points improve coverage, but latency and packet loss remain concerns for real-time control systems. Industrial Wi-Fi implementations often use dedicated band configurations separate from office networks, with quality-of-service settings to prioritize critical traffic.

Cellular wireless (mobile broadband) provides coverage over large areas but involves subscription costs and depends on carrier network availability. LTE and 5G speeds range from 10 Mbps to over 1 Gbps depending on conditions, frequency band, and network load. In remote locations without fiber infrastructure, cellular modems serve as primary internet connections for equipment monitoring and remote access.

The term 'wireless internet' conflates network access technology with internet service provision. Technically, wireless networks exist independently of internet connectivity, but in modern usage they are nearly synonymous. Industrial applications must distinguish between local wireless connectivity (sufficient for real-time equipment communication) and actual internet access (which may have unacceptable latency for safety-critical systems).