Access Control for Terminal Handover via Direct Interface
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Solution Overview
Problem
Existing technologies lack a method for effective access control during handover processes when a terminal switches between access network elements via a direct interface, particularly in scenarios involving closed subscriber group (CSG) access modes.
Innovation Solution
A method and system where the source access network element notifies the target access network element of closed subscriber group configuration information, allowing the target access network element to determine access permissions based on the CSG configuration of both the source and target cells, using a direct interface for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a terminal performs handover via direct interface between access network elements, then handover speed and efficiency are improved, but access control capability is lost
Solution Approach 1:
The source access network element performs preliminary actions by notifying the target access network element of the terminal's CSG membership status and closed subscriber group configuration information before the handover is completed. This ensures that access control permissions are established in advance, allowing the target element to enforce access control immediately upon handover without losing control capability.
Solution Approach 2:
The patent introduces an intermediary communication mechanism where the source access network element acts as a mediator to transfer access control information (CSG membership status, closed subscriber group configuration) to the target access network element through the direct interface. This intermediary information transfer enables access control to be maintained during the direct handover process.
2Measurement precision
If closed subscriber group configuration information is transferred during handover, then access control accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential access control information needed for handover (CSG membership status, closed subscriber group configuration) from the complete terminal profile, rather than transferring all terminal data. This selective extraction maintains access control accuracy while minimizing signaling overhead by including only the minimum necessary information.
Solution Approach 2:
The patent implements partial action by transferring only the specific CSG-related access control information required for handover decision-making, rather than complete access control profiles. This partial information transfer is sufficient for maintaining access control accuracy while reducing the burden on the signaling system.
Data Source
AI summary
The present invention discloses a method for access control of a terminal, which is applied to the access control of the terminal in a terminal handover process. The method comprises: a source access network element notifying a target access network element of closed subscriber group configuration information of a source cell via a direct interface, and the target access network element determining whether to allow the terminal to access to a target cell based on closed subscriber group configuration information of the target cell and the closed subscriber group configuration information of the source cell. The present invention further discloses a method for access control of a terminal and an access equipment. The present invention provides a feasible scheme for the access control process when the terminal performs handover via a direct interface.