7750 Service Router Mobile Gateway

The 7750 SR mobile gateway is a high-capacity, flexible, router-based gateway that is optimized to deliver enhanced mobile broadband services with exceptional performance and scale. It performs the following mobile gateway functions:

• User Plane Forwarding Function (UPF) in 5G networks
• Serving and Packet Data Network gateway (SGW/PGW) in 4G networks
• GPRS Gateway Serving Node (GGSN) in 2G/3G networks
• Non-3GPP Interworking Function (N3IWF) in 5G untrusted networks
• Trusted wireless access gateway (TWAG) for 3GPP trusted access networks
• Evolved Packet Data Gateway (ePDG) for untrusted non-3GPP networks
• Subscriber Services Gateway (SSG) for value-added, integrated IP services  

5G User Plane Forwarding  

To meet the performance for 5G high-bandwidth applications, the 7750 SR Mobile Gateway provides the throughput capacity and packet processing that is needed with its in-house designed (FP) network processors. This advanced chipset, not only delivers the multi-gigabit speed that is required by high-end mobile users but also the quality of experience expected with advanced QoS and network application optimization capabilities.  

Through the implementation of 3GPP Control/User Plane Separation (CUPS) architecture, the 7750 SR Mobile Gateway can cost-effectively forward user data while session management and signalling control is independently handled by virtual 5G Core control functions.

Mobile Gateway  

For 4G and 2G/3G radio access networks (RANs), the 7750 SR mobile gateway supports the Serving Gateway (SGW), PDN Gateway (PGW) and/or Gateway GPRS Support Node (GGSN) functions, either separately or in combination.  

Non-3GPP network access  

As an ePDG, the 7750 SR Mobile Gateway gives operators the ability to expand their presence by providing delivery of mobile packet services over untrusted network access, including residential, public and enterprise Wi-Fi hotspots. It provides session continuity when moving from cellular to untrusted non-3GPP networks and supports a range of authentication mechanisms.  

When deployed as a TWAG, the 7750 SR Mobile Gateway supports the interworking and session continuity between the mobile packet core and trusted Wi-Fi radio access networks (Wi-Fi RAN) with capabilities that include 3GPP network access, secure authentication, and RAN encryption.  

In 5G, the 7750 SR Mobile Gateway supports N3IWF, providing authentication and authorization over non-3GPP access networks providing a secure connection between the user equipment and the 5G Core.  

Subscriber Services Gateway

• The Nokia 7750 SR Mobile Gateway can also be optionally deployed as an SSG providing a broad range of functions and applications in the mobile core or for fixed/mobile operators on the Gi/SGi LAN interface. Applications include: traffic detection function (TDF), converged access policy and charging, service chaining and steering, video and radio access network (RAN) optimizations, and value-added, opt-in services such as parental-control.