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For the complete documentation index, see llms.txt. This page is also available as Markdown.

EPC Interfaces

Diameter EPC Interfaces

Diameter EPC (Evolved Packet Core) interfaces are used in LTE networks for signaling and control communications. Key interfaces include:

  • S6a: Between MME and HSS, used for authentication and user profile management.

  • S6d: Between SGSN and HSS for similar purposes in 2G/3G networks.

  • S13: Between MME and EIR, for Equipment Identity Check.

  • Gx: Between PCRF and PCEF, for policy control and charging rules.

  • Rx: Between PCRF and AF, to transmit application-level session information.

These interfaces ensure seamless network operation and efficient management of user sessions and policies.

Importance of Diameter EPC Interfaces

These interfaces facilitate critical functions such as:

  • Authentication: Ensuring that only authorized users can access the network.

  • Policy Management: Enforcing rules that define how data is prioritized and managed.

  • Roaming: Allowing users to seamlessly switch between different network operators.

  • Billing: Collecting data needed for accurate usage-based billing.

Understanding how to configure and troubleshoot these interfaces is essential for network engineers and administrators.

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