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Subscriber Data Management (SDM)

Ready for 5G, cloud and future networks

The roll out of 5G and cloud technologies places new demands on Subscriber Data Management (SDM). As well as supporting the operational needs of legacy networks, SDM must also fulfill new 3GPP-defined requirements.

SDM sits at the heart of the core network, storing valuable data used by diverse telecoms services. To make the most of 5G, transform your SDM into open, extensible cloud-native software applications that provide standards-based functions and enable rapid innovation.

What is Subscriber Data Management (SDM)?

Complying with 3GPP User Data Convergence and 5G standards, Nokia SDM centralizes user data into a single, robust Unified Data Repository (UDR) that hosts applications and ensures SDM security. The Unstructured Data Storage Function (UDSF) enables control applications to store their session data and become session stateless.

SDM solution

Support unified subscriber access management with Nokia Registers:

  • 5G subscriber authorization, registration and mobility management are supported by the Unified Data Management (UDM) and Authentication Server Function (AUSF)
  • 2G/3G/4G are supported by Home Subscriber Server (HSS) and Home Location Register (HLR) interworking with 5G UDM for domain spanning use cases.

Simplify subscriber and services management:

  • Securely identify terminals accessing the network the key solution is Equipment Identity Register (EIR)

Infographics: SDM multi-applications

Infographics: SDM multi-applications

Ready your access network to handle more users, different devices and run new services

Use stateless network functions for the highest performance

  • The UDSF supports 5G network functions in a stateless architecture for a highly reliable core network.

Innovate rapidly with open programmability capabilities

SDM data

With Nokia SDM, user data is centralized in a secure, highly scalable repository. As a single point of provisioning, this saves costs and substantially shortens the time taken to launch new technologies and services or to activate new customers.

The database is held in Network Directory Server (One-NDS) and Shared Data Layer (SDL) which provide a resilient and distributed data and application-hosting environment.

Infographic: SDM common user data repository

Infographic: SDM common user data repository

Boost revenues with new market opportunities

Nokia SDM is open and flexible to easily integrate third-party applications that meet new customer demands. Operators gain the reliability, scalability and flexibility they need to address a wide range of requirements when deploying IoT or new services for vertical markets.

Video: Evolving Subsciber Data Management to the cloud

How to move SDM to 5G

Nokia SDM paves the way for networks to evolve to the telco cloud and 5G. Virtualized front-end applications are already available for the smooth progression to Nokia Shared Data Layer (SDL), bringing the benefits of the cloud. Your investment is protected and you can upgrade your network at a pace matched to your needs.

The SDM evolution to 5G

The SDM evolution to 5G


Geo-redundancy boosts operational excellence

With geo-redundancy and built-in mechanisms, our SDM solution is proven in the field to provide superior reliability. It also offers unparalleled scaling, from small deployments to networks with more than 250 million subscribers.

Save costs and reduce time to market

Simplify your network and operations with a cost-effective converged solution and single point of provisioning. Whether your customers subscribe to fixed, mobile, cable or Wi-Fi services, or you offer multiple play services  across fixed voice, mobile voice, broadband and video services, our SDM solution’s common subscriber data repository helps you achieve the highest operational efficiency.

Modernize your network with confidence

Our expert teams have the deep experience of network modernization and swaps needed to safely and efficiently upgrade your network in the shortest time. Nokia is the market leader in Subscriber Data Management and we have delivered our solution in more than 130 countries.

Our customers say about Nokia SDM solution

“Nokia’s Subscriber Data Management software offers secure, robust connectivity capabilities, while simultaneously streamlining our network services. This allows us to better support our growing 5G networks and capture operational efficiencies. We look forward to developing a new generation of 5G services with Nokia.”

Brendan O’Reilly / CTO, Telefónica UK

"This deployment is a testimony of our strong and enduring relationship with Nokia. Nokia's proven SDM solution is enabling us to enhance efficiency by consolidating subscriber data across various networks. This is one of the earliest applications over the cloud and is not only helping us by offering a superior experience to our customers but also by simplifying our operational model."

Osama Said / CTO, Vodafone Egypt

Explore our related products and solutions


Authentication, authorization and accounting (AAA)

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Core Engineered Systems

Quickly realize foundational core network services

Shared Data Layer

Optimize telco cloud applications and architecture to achieve maximum benefit from the cloud


Cloud Deployment

Delivery and integration services for telco cloud and core networks

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