dsTest supports server emulation and client simulation for the 3GPP Diameter Gxx Interface. Test Serving Gateway (SGW) Gxc interfaces in LTE Evolved Packet Core (EPC) networks and Access Network Gateway (AGW) Gxa interfaces in trusted IP Connectivity Access Networks (IP-CAN) with our Policy Control and Charging Rules Function (PCRF) Emulator. Use the Gxx Interface application to simulate a Bearer Binding and Event Reporting Function (BBERF) to test the capacity and performance of a PCRF. Use the PCRF Emulator and Gxx Interface application in tandem to test Diameter Routing Agents (DRA), Diameter Proxies, Relay Agents, and Redirect Agents. dsTest provides more tools for LTE testing. The Gxx Interface is specified in 3GPP TS 23.203 and TS 29.212.
Comprehensive sets of operational measurements for the Gxx Interfaces, Diameter, and socket level are collected at configurable intervals and stored in a SQLite database on the dsTest server. Real-time measurements may be retrieved through our dsClient CLI interface or graphed via our dsClient GUI interface.
The Gxx application implements the following procedures:
- Bearer control mode selection;
- Provisioning of Gxx event triggers;
- QoS rules request;
- QoS rules provision;
- Gateway control session termination;
- Request of gateway control session termination.
A complete set of events that can be generated with the Gxx interfaces can be found here.
The PCRF emulator executes procedures based on configurable subscriber profiles and PCC rules, responding to requests and reports from BBERFs and eliminating the need to dedicate a production server to lab activities. You can execute a test event chain with a run-time command or during an automated test to request IP-CAN session terminations for specified subscribers or to simulate changing network conditions:
- Register or cancel event triggers in the BBERF;
- Install, modify, or remove QoS rules in the BBERF.
When the Gx interface is also present, session binding is supported, along with QoS rule synchronization between Gx and Gxx, and complete policy and charging control emulation for non-3GPP access is possible.
PCRF Testing (Client Simulation)
The Gxx Interface application can be used to simulate SGW or AGW BBERF functionality to determine the impact of new PCRF features and standards before they are deployed in a network. The Gxx Interface application allows users to validate PCRF performance and capacity in a realistic network environment, replicating the deployment configuration.
- Start and stop specified subscriber sessions, simulating real-world subscriber activity;
- Simulate gateway control session modifications with QoS rules update requests, modifying previous requests for resources or adding new requests.
Multiple SGW and AGW nodes can be instantiated on a single server, each with scalable subscriber loads and transaction rates. In this mode, up to 1000 independent nodes may be simultaneously simulated. The nodes are fully independent and their subscriber configurations may also be independent, overlap, or be duplicated.
Advanced Testing Features
Enhance your testing with Developing Solutions advanced testing features:
- Insert, delete, or replace AVPs in your messages with our SmartAVP solution. SmartAVP enables you to define proprietary signaling or to corrupt AVPs to facilitate negative testing.
- Configure commands to define the series of actions and rates that each subscriber takes. Advanced profiles can be created using SmartEvents to define a mix of traffic based on probability assignments. With SmartEvents, you can specify when your SmartAVPs are used.
- Define a set of message templates against which all messages will be validated with our Diameter Dictionary. Every Diameter message is validated, even under load conditions.
- Gxx – 3GPP TS 23.203 and TS 29.212
- Diameter – RFC 6733, RFC 3588 and RFC 5516
- SCTP – RFC 4960
- TCP – RFC 793
General Reference Guides
- Diameter Dictionary
- Diameter Result Codes
- RADIUS Dictionary
- S1 Dictionary
- GTP Cause Values
- Specification Map