Wireless 5G Core Network

IP Network Simulation

5G N11 Interface Emulation

MAPS™ 5G-N11 can emulate and test Access and Mobility Management Function (AMF) and Session Management Function (SMF) elements via the Nudm service-based N11 interface.

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MAPS™ 5G N11 Interface Simulation

Overview

GL's Message Automation & Protocol Simulation (MAPS™) 5G System as a service-based architecture, includes a set of Network Functions (NFs) providing services as defined in 3GPP standards. The service-based interfaces use HTTP/2 protocol with JavaScript Object Notation (JSON) as the application layer serialization protocol.

MAPS™ 5G N11 interface can emulate Session Managements Function (SMF), within the 5G Core Network offering services to Access and Mobility Management Function (AMF) via the Namf service-based N11 interface.

MAPS™ N11 Interface Emulator supported Procedures are -

  • Nsmf_PDUSession: Create SM Context, Update SM Context, Release SM Context, Notify SM Context Status and Retrieve SM Context operations
  • Namf_Communication : N1N2MessageTransfer (UE Specific) operations based on N20 interface

GL has enhanced its MAPS™ protocol emulation tool to emulate multi-protocol and multi-interface offering a complete range of test solutions, covering the entire 5G, 4G, 3G and 2G network.

By mimicking real-world customer behavior in lab environments, our solutions allow mobile operators and equipment manufacturers to verify their 5G networks before deployment.

GL also provides a GUI based Multi-Protocol Analyzer for on-line capture and decode of the signaling in real-time both during tests and as a stand-alone tracer for live systems.

Main Features

  • Emulate SMF and AMF elements
  • Supports Nsmf_PDUSession and Namf_Communication Services
  • Services use REST APIs based on HTTP and JSON data format
  • Supports TLS and TCP transports
  • Supports scripted call generation and automated call reception
  • Supports customization of call flow and message templates using Script and JSON Messages
  • Ready-to-use scripts for quick testing
  • Provides Call Statistics and Events Status
  • Emulate multiple Subscribers using CSV Profiles
  • Automation, Remote access, and Schedulers to run tests 24/7

Supported Protocols Standards

Protocols Standards

Protocols Standards

Supported Protocols
Standard / Specification

N11 Interface (SMF - AMF)

TS29.502 Release 16 (SMF)
TS29.518 Release 16 (AMF)

JavaScript Object Notation (JSON)

IETF RFC 8259

HTTP/2

IETF RFC 7231
IETF RFC 7540/RFC 7541

TLS

IETF RFC 8446

TCP

IETF RFC 793

IPv4

IETF RFC 791 [5]
IETF RFC 2460 [6]

Use Cases

MAPS™ N11 configured as AMF to test SMF (DUT)

MAPS™ N11 configured as AMF to test SMF (DUT)

MAPS™ N11 configured as SMF to test AMF (DUT)

MAPS™ N11 configured as SMF to test AMF (DUT)

5G N11 Interface Procedures

In 5G N11 interface, MAPS™ acts either as AMF to test SMF or SMF to test AMF emulating the following procedures.

  • Nsmf_PDUSession Services
    • Create SM Context Service Operation
    • Update SM Context Service Operation
    • Release SM Context Service Operation
    • Notify SM Context Status Service Operation
    • Retrieve SM Context Service Operation
  • Nudm_UEContextManagement Service

Nsmf_PDUSession Services

Create SM Context Service Operation

Create SM Context Service Operation

Update SM Context Service Operation

Update SM Context Service Operation

Release SM Context Service Operation

Release SM Context Service Operation


Notify SM Context Status Service Operation

Notify SM Context Status Service Operation

Retrieve SM Context Service Operation

Retrieve SM Context Service Operation


Nudm_UEContextManagement Service

The SMF uses N1N2 Message Transfer service operation to transfer N1 and/or N2 information to the UE through the AMF in the following procedures:

  • Network triggered Service Request
  • PDU Session establishment
  • PDU Session modification
  • PDU Session release
  • Session continuity, service continuity and UP path management
  • Inter NG-RAN node N2 based handover
  • SMS over NAS procedures
  • UE assisted and UE based positioning procedure
  • Network assisted positioning procedure
  • UE configuration update procedure for transparent UE policy delivery
N1N2 AMF Communication Services

The below figures depict the Call Generation and Reception of 5G N11 interface between AMF and SMF.

5G N11 interface Call Generation at AMF Node

5G N11 interface Call Generation at AMF Node

5G N11 interface Call Reception at SMF Node

5G N11 interface Call Reception at SMF Node

Resources

Please Note: The XX in the Item No. refers to the hardware platform, listed at the bottom of the Buyer's Guide, which the software will be running on. Therefore, XX can either be ETA or EEA (Octal/Quad Boards), PTA or PEA (tProbe Units), UTA or UEA (USB Units), HUT or HUE (Universal Cards), and HDT or HDE (HD cards) depending upon the hardware.