Relay Node Access Control Closed Subscriber Group Alignment
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Solution Overview
Problem
Current access control mechanisms for relay nodes with closed subscriber groups (CSGs) in relay-enhanced cellular systems do not adequately consider the CSG settings of both the relay node and the donor base station, leading to potential misalignment and improper access control, especially in layered CSG cell scenarios where CSG settings differ.
Innovation Solution
The proposed solution involves retrieving and acquiring setting information for the CSGs of both the relay node and the donor base station, performing access control based on compatible CSG settings, and ensuring that the relay node's CSG parameters align with those of the donor base station to ensure proper access control, including the use of a processor to manage and verify CSG settings for successful access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If access control is performed considering only the donor base station's CSG settings, then the access control process is simple, but the relay node's own CSG settings are ignored leading to potential misalignment and improper access control
Solution Approach 1:
The relay node performs preliminary retrieval of its own CSG setting information before the access control decision is made. This preliminary action ensures that both the relay node's and donor base station's CSG settings are considered in the access control process, preventing misalignment while maintaining a straightforward control mechanism.
2Reliability
If CSG setting information is retrieved and verified for both relay node and donor base station, then access control accuracy is improved, but the complexity of the access control process increases
Solution Approach 1:
The mobility management entity acts as an intermediary that handles the retrieval and verification of CSG setting information. By centralizing this function in the mobility management entity, the complexity of managing multiple CSG settings is distributed, and the relay node and donor base station only need to provide their respective settings without processing the full access control logic.
3Speed
If the relay node's base station function is allowed to access the network without CSG compatibility check, then the relay node can connect quickly, but CSG parameter misalignment occurs leading to security vulnerabilities
Solution Approach 1:
CSG setting information is retrieved and compatibility verification is performed in advance, before the relay node's base station function is allowed to access the network. This preliminary verification ensures that only compatible relay nodes are admitted, preventing CSG parameter misalignment and security vulnerabilities while maintaining efficient connection processes.
Data Source
AI summary
There are provided measures for access control of a relay node with a closed subscriber group, said measures exemplarily comprising retrieval of setting information relating to a closed subscriber group of a base station function of a relay node, said relay node requesting access to a relay-enhanced cellular system via a donor base station, acquisition of setting information relating to a closed subscriber group of the donor base station, and execution of access control of the base station function of the relay node based on the setting information relating to the closed subscriber groups of the base station function of the relay node and the donor base station.