Ericsson SGSN-MME

Our high capacity SGSN-MME includes a wide range of customer requested features and has achieved excellent in-service performance (ISP) figures during high-traffic conditions.

The SGSN-MME includes SGSN functionality for GSM and WCDMA access and Mobility Management Entity (MME) functionality for LTE and Evolved Packet Core (EPC). The EPC network architecture can be implemented through software upgrades of installed SGSN nodes, which means that previous investments in GSM/WCDMA are protected.

We have unparalleled experience from the deployment and operations of commercial LTE/EPC networks. We launched the world's first commercial LTE/EPC network in Europe and the world's largest network in the US. We have also built and are operating a large number of commercial and pre-commercial LTE/EPC networks across the globe, all including the SGSN-MME.

Key features

The Serving GPRS SUPPORT NODE – Mobility Management Entity (SGSN-MME) provides packet-data switching and mobility/session management in GSM, WCDMA and LTE networks. It has excellent, proven ISP and extensive functionality, which optimizes network operation and minimizes total cost of ownership.

The SGSN is upgraded to an SGSN-MME mobility server for Evolved Packet Core networks by a smooth software upgrade. The SGSN-MME supports triple 3GPP access, GSM, WCDMA and LTE and can be included in an SGSN-MME Pool. 

Building on the proven software and functionality, the new SGSN-MME MkVIII platform on Ericsson Blade System extends the capabilities to meet even the most aggressive growth predictions. It offers superior scalability that supports 18 million users per node and up to 1152 million users when deployed in a pooled configuration.

Key features and characteristics include:

  • GSM, WCDMA and LTE dual or triple access
  • SGSN-MME Pool for GSM, WCDMA and LTE
  • Support for HSPA
  • 3G Direct Tunnel (3GDT)
  • Support for all-IP and SIGTRAN
  • Seamless mobility for all radio access types
  • High-capacity, single-cabinet hardware
    - Scalable up to 18 MSAU
    - Small footprint (0.0024 square meters per 100k attached users)
    - Low power consumption (~50 W per 100k attached users)


The SGSN-MME is equipped with multi-purpose hardware, ensuring a cost-effective migration to Evolved Packet Core architecture (as defined by 3GPP). Thanks to powerful hardware, the migration and conversion of the SGSN to a Mobility Management Entity (MME) only requires a software upgrade.

We were the first company to make this evolution toward a flat IP-based network architecture. In April 2008, we implemented the feature 3G Direct Tunnel in a commercial network. 3G Direct Tunnel allows data traffic to bypass the SGSN-MME, significantly increasing network capacity and allowing the SGSN to function as an MME signaling server.

As such advanced features are implemented in our SGSN only by means of software, your earlier investments are protected while providing a smooth network evolution path.

Scalable, efficient and cost-effective

With the high capacity, scalability (100 kSAU to 18 MSAU), small footprint and low power consumption of our SGSN-MME, you can optimize the operation of and manage the increasing volume of traffic from mobile broadband. The SGSN-MME is continually developed to incorporate new features, contributing to reduced costs and increased revenue.

For example, the combination of the features GSM and WCDMA Dual Access and SGSN-MME Pool has provided major capacity gains and reduced redundancy. Another example is the feature 3G Direct Tunnel. With this feature implemented, the SGSN-MME load scales only in relation to control signaling and not payload traffic, which can significantly reduce the number of SGSN-MMEs required.