18251766. Handling PLMN Prioritization simplified abstract (Apple Inc.)

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Handling PLMN Prioritization

Organization Name

Apple Inc.

Inventor(s)

Roland Gruber of Sauerlach (DE)

Deepak Dash of Bangalore (IN)

Nitin Kuppelur of Bangalore (IN)

Handling PLMN Prioritization - A simplified explanation of the abstract

This abstract first appeared for US patent application 18251766 titled 'Handling PLMN Prioritization

Simplified Explanation

The abstract describes a patent application related to user equipment (UE) in a mobile network. Here is a simplified explanation of the abstract:

  • The UE sends a registration request message to a roaming public land mobile network (PLMN).
  • It receives a registration accept message from the roaming PLMN.
  • The UE checks if the registration accept message includes a manipulated steering of roaming (SoR) container, which is configured by the UE's home PLMN and transmitted to the roaming PLMN.
  • The UE also checks if the registration accept message indicates that the roaming PLMN does not support voice over packet switching (VoPS).
  • If the SoR container is present or the VoPS support is not indicated, the UE adds the roaming PLMN to a list of PLMNs where voice service is not possible in a certain mode.

Potential applications of this technology:

  • Enhancing the registration process for user equipment in roaming scenarios.
  • Improving the management of voice services in different PLMNs.
  • Optimizing the user experience by providing accurate information about voice service availability.

Problems solved by this technology:

  • Inaccurate or incomplete information about voice service availability in roaming PLMNs.
  • Difficulties in determining the support for voice over packet switching in different PLMNs.
  • Lack of a standardized mechanism to handle voice service limitations in roaming scenarios.

Benefits of this technology:

  • Improved efficiency in the registration process for user equipment.
  • Enhanced user experience by avoiding situations where voice service is not possible.
  • Better management of voice services in roaming scenarios, leading to improved network performance.


Original Abstract Submitted

A user equipment (UE) transmits a registration request message to a first public land mobile network (PLMN), wherein the first PLMN is a roaming PLMN, receives a registration accept message from the first PLMN, determines that the registration accept message includes a manipulated steering of roaming (SoR) container or does not include a SoR container, wherein the SoR container is configured by a home PLMN (HPLMN) of the UE and transmitted to the first PLMN from the HPLMN, determines that the registration accept message includes an indication that the first PLMN does not support voice over packet switching (VoPS) and adds the first PLMN to a first list of PLMNs in which voice service is not possible in an N1 mode.