USI Roaming Registration via Home Network AAA Interaction
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Solution Overview
Problem
Existing protocols do not effectively enable terminal registration in a Universal Service Interface (USI) system when a terminal roams to a remote area, affecting service implementation, particularly for services like broadcast services available only in the visited network.
Innovation Solution
A method and system that allow a Home network USI system to receive a registration request from a Visited network USI system, interacting with a Home network AAA server to register the terminal, using a new interface (U5) to transmit registration messages and service information, ensuring seamless USI service implementation even in roaming scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal is registered in a USI system of the home network, then the terminal can access home network services, but the USI system in the visited network is unable to obtain the USI registration information of the terminal in the home network, affecting implementation of certain services such as broadcast service
Solution Approach 1:
The patent introduces a USI registration information transfer mechanism where the visited network USI system acts as an intermediary to obtain registration information from the home network USI system. The home network USI system sends the terminal's USI registration information to the visited network USI system through a standardized interface, enabling the visited network to provide services without directly accessing the home network's internal identity system.
Solution Approach 2:
The patent segments the USI registration information into transferable data elements that can be exchanged between networks. The registration information is separated from the terminal's internal identity and transmitted as discrete information packets through the U1 interface, allowing selective information sharing while maintaining security boundaries.
2Adaptability or versatility
If existing protocols are used for terminal registration, then the protocol structure is simple, but the protocol does not define how to register a terminal in a USI system after the terminal roams to a remote area
Solution Approach 1:
The patent extends the existing USI registration protocol to handle both home network and visited network scenarios universally. The same registration message structure and processing logic are used regardless of whether the terminal is in its home network or roaming, achieving multi-functionality without requiring separate protocol definitions for different scenarios.
Solution Approach 2:
The patent establishes preliminary arrangements for roaming registration by defining the information transfer mechanism between home and visited USI systems in advance. The home network USI system is pre-configured to send registration information to visited networks, so that when roaming occurs, the registration process can proceed immediately without requiring complex runtime negotiations or additional protocol extensions.
Data Source
AI summary
A method, an apparatus, and a system for registering in a USI system are disclosed herein. The method includes: an H-USI system receives a USI registration request message that carries an identifier of a terminal from a V-USI system; and the H-USI system interacts with an H-AAA server according to the USI registration request message to perform USI system registration for the terminal. An apparatus for registering in a USI system is disclosed herein. The apparatus includes a receiving module and a registering module. Through the method and the system disclosed herein, the terminal can be registered in the USI system successfully, and the USI service can be implemented smoothly.