UE Access Control via Pre-saved D2D Authorization Data
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Solution Overview
Problem
Current D2D direct discovery and direct communication in LTE networks face high signaling overhead due to frequent authentication requests and unclear authorization status for UE resource allocation.
Innovation Solution
A method for supporting UE access control by obtaining and saving authorization information for D2D services, allowing radio network nodes to perform access control based on pre-saved information, reducing the need for repeated authentication and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent authentication requests are performed for D2D services, then access control security is improved, but signaling overhead increases
Solution Approach 1:
The network node performs preliminary authentication and obtains authorization information for D2D services before the UE actually requests them. This authorization information is stored and reused for subsequent D2D service requests, eliminating the need for frequent re-authentication while maintaining security. The preliminary action of obtaining and storing authorization information resolves the contradiction by reducing repeated signaling overhead while preserving access control security.
2Ease of operation
If UE-specific D2D resources are allocated by base station, then resource allocation control is improved, but the base station cannot determine authorization status
Solution Approach 1:
The patent introduces an authorization information indicator as an intermediary element that carries authorization status from the network core to the base station. This indicator includes information about whether the UE is authorized for D2D services, direct discovery services, and direct communication services. The intermediary authorization information enables the base station to perform resource allocation control without needing to directly determine authorization status, resolving the information gap while maintaining operational control.
Data Source
AI summary
The present disclosure provides a method for supporting UE access control. A base station is informed by a ProSe Function via a MME or informed by the MIME of information indicating whether a UE is authorized for a D2D service. The base station performs an access control to the UE according to the information indicating whether the UE is authorized for the D2D service. The present disclosure further provides a method in which a source base station informs a target base station of the information indicating whether the UE is authorized for a D2D service. The target base station performs an access control according to the information.