LDAP Queries

The Policy Server manages the 4G and 5G subscriber information in separate modules, which indicates that the PCRF continues to store the 4G-specific information, and PCF preserves the 5G-specific details. When the Policy Server receives a request seeking subscriber information, the LDAP with other components performs the following tasks:

  1. The LDAP queries the MongoDB or Subscriber Profile Repository (SPR) by sending the "Get Subscriber Information" message.

  2. After receiving the query, the Policy Server searches the subscriber information in the local MongoDB instance.

  3. After receiving the search query, the Policy Server searches the subscriber information in the local MongoDB instance.

  4. If the Policy Server discovers the subscriber information on PCRF, it sends the details to LDAP in the defined format. If the PCRF does not find the information, it forwards the request to PCF for further processing.

  5. When PCF detects the information, it notifies PCRF with the subscriber information, which the PCRF forwards to the LDAP in the specified format.