5G private networks for industrial IoT deployments

A private 5G network is a dedicated 5G cellular network deployed and operated for a single enterprise on their premises, providing exclusive wireless connectivity with configurable performance guarantees. Public 5G is operated by mobile network operators (Vodafone, AT&T, etc.) as a shared service for all subscribers, with traffic routed through the operator's national infrastructure. Key differences: private 5G provides guaranteed bandwidth (not shared with other customers), on-premises data processing (no traffic leaving the facility), configurable QoS for different application types, and complete network control — enterprises can configure latency, security policies, and network slicing to their specific operational requirements without dependence on an operator's network architecture choices.

Choose private 5G over Wi-Fi 6 when: your application requires deterministic latency (robot control, motion control systems need sub-5ms guaranteed latency that Wi-Fi's contention-based medium access cannot reliably provide); you need to cover large outdoor areas or facilities with deep indoor coverage challenges; your deployment involves fast-moving equipment (AGVs, forklifts, outdoor vehicles) where Wi-Fi handoff interruptions are unacceptable; you require very high device density (hundreds to thousands of IoT sensors per km²); or data sovereignty requirements mean traffic must not travel via cloud-connected Wi-Fi infrastructure. Wi-Fi 6/6E remains the better choice for office environments, moderate-density deployments, and cost-constrained projects without deterministic latency requirements.

CBRS (Citizens Broadband Radio Service) is a 150 MHz band of spectrum at 3.5 GHz in the US that the FCC made available for enterprise private LTE/5G deployments. It operates under a three-tier sharing framework: incumbent users (US Navy radar, satellite earth stations) have highest priority; Priority Access Licensees (PALs) purchase 10-year licenses at county level via FCC auctions and have interference protection from the third tier; General Authorised Access (GAA) users can deploy without a licence but receive no interference protection. For enterprises, PALs provide licensed spectrum for mission-critical private 5G with interference protection at a fraction of traditional spectrum licensing cost. The CBRS Alliance (now OnGo Alliance) manages ecosystem interoperability across equipment from multiple vendors.

Network slicing is a 5G feature that allows a single physical network infrastructure to be partitioned into multiple isolated virtual networks (slices), each configured with different performance characteristics. For an industrial private 5G network, you might create: a URLLC (Ultra-Reliable Low Latency Communications) slice for robot control with sub-1ms latency and 99.9999% reliability; an eMBB (enhanced Mobile Broadband) slice for video streaming and AR/VR with high throughput; and an mMTC (massive Machine Type Communications) slice for IoT sensors with low-power, high-density connectivity. Each slice has its own QoS guarantees — traffic in the robot control slice is prioritised and isolated from the video traffic even when the network is congested, preventing one application type from impacting another.

Open RAN (O-RAN) is an industry initiative that disaggregates the traditional monolithic Radio Access Network into standardised, interoperable components from different vendors — separating the Radio Unit (RU), Distributed Unit (DU), and Centralised Unit (CU). For private 5G, O-RAN offers the potential to mix hardware from different vendors (e.g., Samsung radios with Mavenir software), reducing lock-in and cost. In practice, O-RAN for private 5G is more mature in some deployment scenarios than others — enterprise deployments often opt for integrated vendor solutions (Ericsson, Nokia) for simpler deployment and support, while larger, technically sophisticated deployments (ports, large manufacturers) are adopting O-RAN to reduce vendor dependency. O-RAN maturity continues to improve with each generation of equipment.

AWS Private 5G is a managed service that simplifies private LTE/5G deployment by providing hardware (radio units, servers), software (core network, SIM management), and integration with AWS cloud services as a turnkey solution. Enterprises specify their coverage area, and AWS provisions and ships pre-configured equipment. The network is monitored and managed through the AWS console, with the 5G core running on AWS-managed hardware on-premises for data sovereignty. AWS Private 5G integrates with AWS IoT services, enabling direct connection from 5G-connected devices to AWS IoT Core, Greengrass, and other edge services. It eliminates the need for specialist 5G radio and core engineering — suitable for enterprises that want private 5G capability without building internal telecoms expertise.

Private 5G deployment costs vary significantly by site size, coverage requirements, and vendor. A small factory floor deployment (10,000–50,000 sq ft, 2–4 small cells, supporting 50–100 devices) typically ranges from $200,000 to $500,000 in hardware and software capex, plus annual management and support costs of $50,000–$100,000. A large industrial site (port, large factory, campus with outdoor coverage) can cost $1–5M+ for full deployment. Managed service approaches (AWS Private 5G, MNO-operated private networks) reduce upfront capex in favour of monthly service fees, typically $5,000–$20,000 per month for small-to-medium deployments. Cloud-managed private 5G solutions from Nokia and Ericsson are available as opex subscription models that reduce the financial commitment of initial deployment.

Private 5G addresses OT security requirements through several mechanisms: SIM-based device authentication (only SIM-provisioned devices can connect, unlike Wi-Fi where any device with the password can join); network slicing that isolates OT control traffic from IT and IoT sensor traffic at the network layer; on-premises 5G core deployment that ensures OT control traffic never leaves the facility; integration with OT security platforms (Claroty, Dragos, Nozomi Networks) for traffic monitoring and anomaly detection; and support for OPC-UA security profiles on 5G-connected industrial equipment. Private 5G also simplifies OT network segmentation — the 5G network provides inherent segmentation between device types through separate bearers and QoS profiles, replacing complex VLAN configurations.