Roaming Network CSG Access Control via Local Subscription Server
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Solution Overview
Problem
The existing CSG access control methods lack flexibility as they rely on the home network for managing and maintaining CSG information, limiting the ability to perform access control for roaming terminals.
Innovation Solution
A cell access processing method and apparatus that allows the roaming network to manage and maintain CSG information, enabling access control by sending a CSG information request message to a CSG subscription information server, thereby allowing access control to be performed independently of the home network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the home network manages and maintains CSG information for access control, then the access control mechanism is standardized and reliable, but the flexibility of CSG access control is reduced
Solution Approach 1:
The patent segments the CSG information management function from the home network to the roaming network. The home network retains subscription management while the roaming network performs local CSG information management and access control decisions, enabling both reliability through standardized subscription management and flexibility through local autonomous control
Solution Approach 2:
The patent enables the roaming network to have local CSG information management capabilities tailored to specific roaming scenarios. Different roaming networks can implement customized CSG access control policies based on local requirements while maintaining compatibility with home network subscription data
2Reliability
If the terminal stores an allowed CSG list locally and the HSS stores ACL in the HPLMN, then the access control basis is established, but the roaming network cannot perform autonomous access control
Solution Approach 1:
The patent introduces a local CSG information database in the roaming network as an intermediary between the terminal's stored ACL and the HSS. This intermediary enables the roaming network to autonomously query and validate CSG information locally without requiring direct communication with the home network during access control
Solution Approach 2:
The patent enables the roaming network to pre-fetch and cache CSG information from the home network before actual access attempts. This preliminary action allows the roaming network to have CSG information ready for autonomous access control decisions, reducing latency and improving operational efficiency
Data Source
AI summary
Embodiments of the present invention provide a cell access processing method and apparatus and a communication system. In a cell access processing method, an access request message is sent by a terminal. The access request message includes identification information of the terminal. A CSG information request message is sent to a CSG subscription information server of a roaming network. The CSG information request message includes the identification information of the terminal. A CSG information response message is sent by the CSG subscription information server according to the CSG information request message. The CSG information response message includes CSG information corresponding to the identification information of the terminal. Access control is performed on the terminal according to the CSG information.