Roaming Terminal Attach Request with Service Level Mapping
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Solution Overview
Problem
A terminal attempting to connect to a visited network lacks information on services supported by the visited network, leading to uncertainty about which service information is required, and service descriptions may differ between home and visited networks.
Innovation Solution
The method involves transmitting an attach request message with roaming level information mapped to service types that the terminal can receive, allowing the visited network to respond with service type information based on a service level agreement between the home and visited networks, facilitating efficient service management during initial attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a terminal attempts to connect to a visited network without service information, then the connection procedure is simple, but the terminal cannot determine which service information is required and service descriptions may differ between home and visited networks
Solution Approach 1:
The terminal performs preliminary action by including roaming level information in the attach request message before actually needing service information. This preliminary inclusion of service capability indicators allows the visited network to prepare and provide appropriate service information in the attach response, eliminating the need for separate service inquiry procedures and resolving the information loss problem while maintaining connection simplicity.
2Adaptability or versatility
If service descriptions are standardized across all networks, then service information is consistent, but the system cannot adapt to different service level agreements between home and visited networks
Solution Approach 1:
The patent applies local quality by allowing service type information to be selectively provided based on the specific roaming level and the service level agreement between particular home and visited networks. The visited network determines which service type information to include in the attach response based on the roaming level indicator and SLA, providing consistent service descriptions for the agreed services while maintaining adaptability to different network configurations.
3Loss of information
If the terminal requests all possible service information, then service completeness is ensured, but the attach procedure becomes complex and time-consuming
Solution Approach 1:
The terminal applies partial action by requesting only the necessary service information through roaming level indicators rather than all possible service information. The visited network then provides only the relevant service type information based on the indicated roaming level and SLA, ensuring service information completeness for the required services while significantly reducing the attach procedure complexity and time compared to requesting all services.
Data Source
AI summary
The present disclosure relates to a communication technique for converging, with an IoT technology, a 5G communication system for supporting a higher data transmission rate than a 4G system, and a system therefor. The present disclosure may be applied to intelligent services, such as smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail businesses, and security and safety related services, on the basis of 5G communication technologies and IoT-related technologies. The present invention suggests a method for providing service information that a roaming terminal seeks to use in an initial access process of the roaming terminal accessing a visited network.