Building Management Systems

Building Management Systems connect HVAC controllers, energy management platforms, access control, environmental sensors, and fire safety systems. The cellular connectivity tier these applications need sits precisely where eRedCap operates: above NB-IoT or LTE-M for throughput, but far below the complexity and cost of mainstream 5G.

BMS Connectivity Requirements

BACnet, Modbus, KNX and other BMS protocols over IP have modest bandwidth requirements. Environmental sensor polling, alarm signalling, and remote configuration are low-data-rate operations. FOTA (firmware over the air) for building controllers requires moderate throughput – well within eRedCap’s 10 Mbps capability. The primary driver is reliability and longevity, not speed.

Network Segmentation with Dual Ethernet

For building applications, the ability to physically separate the BMS network from building occupant Wi-Fi or corporate LAN is important for security and reliability. Routers supporting eRedCap (or current-generation 5G RedCap hardware like the Semtech AirLink EX400) with dual Gigabit Ethernet ports enable this separation without additional switching hardware.

5G SA and Building IoT Security

eRedCap devices on 5G SA benefit from 5G Core security improvements over 4G LTE, including enhanced subscriber identity protection (SUPI concealment via SUCI) and improved network authentication. For building systems in regulated environments (healthcare, financial, government), these security improvements complement GSMA IoT Security Guidelines and CRA compliance requirements.