How it Works

This section describes how this feature works.

The SOR consists of the following HPLMN protected information:

  • An indication of whether the UDM requests an acknowledgment from the UE for a successful SOR reception.

  • It supports one of the following:

    • Indication of the included list of preferred PLMN or access technology combinations.

    • A secured packet with an indication, whether it is included or not.

    • The HPLMN indication, when there are no changes in the operator-controlled PLMN selector, with access technology from the stored list in the needed UE.

As a result, no list of the preferred combinations for the PLMN or the access technology is provided.

Note

The secured packet contains the list of preferred PLMN and access technology combinations. These combinations are encapsulated within a security mechanism as described in 3GPP TS 31.115 [67].

For more on SOR protected information, see 3GPP TS 33.501 [66].