Core Network Selection Using Service Information Without Re-Routing

Solution Overview

Problem

Existing methods for selecting a core network in mobile communication systems are inefficient, leading to increased attachment time, resource overhead, and suboptimal Quality of Service (QoS) due to the need for re-routing and lack of direct core network selection based on user-subscribed services.

Innovation Solution

A method and apparatus that allows the base station or terminal device to directly select a core network using user-subscribed service information, including slice type information, without re-routing, by accessing a service information database or pre-configured service information, thereby improving accuracy and scalability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the conventional method of selecting a core network by first attaching to a default core network and then re-routing is used, then the system can support service-specific core networks, but the attachment time increases and resource efficiency decreases

Engineering Contradiction:

Improveservice-specific core network supportVSAvoidattachment time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The terminal device acquires service information (usage type) in advance before attaching to the network. This preliminary acquisition of subscription information allows the base station to directly select the appropriate service-specific core network from the beginning, eliminating the need for initial attachment to a default core network followed by re-routing, thus reducing attachment time while maintaining service-specific support

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the conventional method of selecting a core network by first attaching to a default core network and then re-routing is used, then the system can support service-specific core networks, but resource efficiency decreases

Engineering Contradiction:

Improveservice-specific core network supportVSAvoidresource efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The terminal device acquires service information (usage type) in advance before attaching to the network. This preliminary acquisition of subscription information allows the base station to directly select the appropriate service-specific core network from the beginning, eliminating the need for initial attachment to a default core network followed by re-routing, thus reducing attachment time while maintaining service-specific support

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If only one service type is permitted for a single user in the conventional method, then the core network selection process is simplified, but the ability to support multiple service types is limited

Engineering Contradiction:

Improvecore network selection process complexityVSAvoidmultiple service type support

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The terminal device acquires service information (usage type) in advance before attaching to the network. This preliminary acquisition of subscription information allows the base station to directly select the appropriate service-specific core network from the beginning, eliminating the need for initial attachment to a default core network followed by re-routing, thus reducing attachment time while maintaining service-specific support

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The base station is designed to handle multiple service types by acquiring service information from the terminal device and selecting appropriate core networks based on usage type. The system supports both service-specific core networks and common core networks, allowing a single base station to serve multiple functions and service types simultaneously

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP4021032B1Method and apparatus for selecting core network in mobile communication system

Publication Date: 2026.05.06 SK TELECOM CO LTD

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AI summary

A method and an apparatus for selecting a core network in a mobile communication system are disclosed. According to some aspects of the present disclosure, a method and apparatus are provided for selecting a core network which is appropriate to the type of user's subscribed service in a mobile communication system, without the need for re-routing.