VPLMN Core Network Device for Seamless Sensing Service Roaming

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Solution Overview

Problem

In cellular mobile communication systems, there is a challenge in providing seamless sensing services to user equipment (UE) when it roams from a Home Public Land Mobile Network (HPLMN) to a Visited Public Land Mobile Network (VPLMN).

Innovation Solution

The proposed solution involves an information processing method where a core network device of the VPLMN receives request information from a UE requesting service information of a visited sensing application function (VSAF). The core network device then sends the service information, including the address of the VSAF, to the UE, enabling it to access and utilize the sensing services during roaming.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If UE roams from HPLMN to VPLMN, then mobility and network coverage are improved, but sensing service continuity and accessibility deteriorate

Engineering Contradiction:

Improvenetwork coverageVSAvoidsensing service continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces a VPLMN core network device as an intermediary between the UE and the VSAF. This core network device receives service information from the VSAF and provides it to the UE during roaming, ensuring continuous sensing service accessibility without requiring direct UE-VSAF connections across network boundaries.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent implements preliminary action by having the VPLMN core network device proactively obtain and prepare service information from the VSAF before the UE actually needs it. The service information is pre-fetched and stored, so when the UE requests sensing services during roaming, the information is already available, eliminating service disruption.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If service information is provided to UE during roaming, then sensing service accessibility is improved, but network complexity and information management burden increase

Engineering Contradiction:

Improvesensing service accessibilityVSAvoidnetwork information management

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the service information management function from the VSAF and places it in the VPLMN core network device. This separation allows the core network device to handle service information independently, reducing the complexity at the VSAF while ensuring UE accessibility during roaming.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The VPLMN core network device autonomously manages service information by automatically obtaining it from the VSAF and storing it for UE requests. This self-service mechanism eliminates the need for manual configuration and reduces operational complexity while maintaining service accessibility.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250168606A1Information processing method and apparatus, communication device and storage medium

Publication Date: 2025.05.22 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

An information processing method is performed by a core network device of a visited public land mobile network (VPLMN), and includes: receiving request information sent by a user equipment (UE), wherein the request information is configured to request service information of a visited sensing application function; and sending the service information of the visited sensing application function to the UE based on the request information, wherein the service information is at least configured to indicate an address of the visited sensing application function.