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Compact Mobility Unit

Build your own private wireless network with CMU

Build your own private wireless network with CMU

About the solution

CMU is ideal for enterprises seeking to deploy locally managed, modular and customizable industrial grade private wireless networks. It provides all the necessary functions of the mobile packet core (MPC) using field-proven software based on our Cloud Packet Core solution for Communications Service Providers.

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Take full control of your private wireless network

The Nokia Compact Mobility Unit (CMU) performs the mobile packet core functions of your private wireless network for mobile broadband, Internet of Things (IoT), and machine-type communication (MTC) services. With CMU, you get the reliability, scalability, flexibility and performance you need to meet your business-critical networking requirements for a diverse range of services. In addition, CMU supports both 4G and 5G radio access network connectivity across licensed, shared (CBRS), and unlicensed wireless access as well as 3GPP 4G Evolved Packet Core (EPC), 5G non-standalone (NSA) core and 5G standalone (SA) core architectures. You can choose CMU as part of our Modular Private Wireless solution or standalone small form factor mobile packet core solution.

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Simple, flexible deployments

CMU simplifies your private wireless network deployment by combining all the essential mobile packet core functions either into a pre-integrated appliance comprised of two HP DL325 Gen11 rack-mounted servers that can fit easily into an IT cabinet or data center or as a containerized network function (CNF) deployed in a Red Hat OpenShift private cloud platform.

High availability

To support your business-critical communications you need a network that delivers high reliability and performance. CMU meets your high availability requirement with hot-standby stateful redundancy and supports edge network configurations for low-latency applications.

Comprehensive IIoT support

CMU helps your business put the Industrial IoT to work. It provides the scalability, performance and the 3GPP cellular IoT (CIoT) feature you need to support LTE-M and narrowband IoT (NB-IoT) applications efficiently and cost effectively.

How does Compact Mobility Unit work?

CMU is responsible for the core network functions of a private cellular network implemented in an integrated single appliance. The respective CMU architectures contain the following elements:

In LTE and 5G NSA architecture:

  • Home Subscriber Server (HSS)
  • Policy and Charging Rules Function (PCRF)
  • Mobility Management Entity (MME)
  • Serving Gateway (SGW)
  • Packet Data Network Gateway (PGW)

In 5G SA architecture:

  • Authentication Server Function (AUSF)
  • Unified Data Management (UDM)
  • Policy Control Function (PCF)
  • Access and Mobility Function (AMF)
  • Session Management Function (SMF)
  • User Plane Function (UPF)

ICMU performs end point profile repository, identification and addressing via HSS and AUSF/UDM, policy control via PCRF and PCF, end point authentication, registration and mobility management via MME and AMF, routing, packet forwarding and session management through S/P GW and UPF/SMF.


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Customer success stories

Use case: Finland’s Posiva was the first company in the world to build a safe disposal facility for spent nuclear fuel. Its latest process innovation involves transporting waste through underground tunnels with remote-controlled vehicles and autonomous robots to keep human operators safe. This required a highly reliable network that could function nearly half a kilometer below the surface of the Earth.

Use case: Brazilian electric power utility, Elektro, wanted to increase grid reliability and sought a robust solution to connect the necessary IoT devices to enable grid automation.



Use case: Sempra, a leading US developer of renewable energy, wanted to connect sensors to monitor data and the health of wind turbine pitch mechanisms and assembly.




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