AMF-Driven UE Capability Matching After AS Security Setup
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Solution Overview
Problem
In existing wireless communication systems, the 5G base station cannot set up an access stratum security context for a UE during registration if the UE does not have a user plane connection, preventing the determination of UE radio capability match and the subsequent indication of IMS voice over PS session, thereby hindering IMS voice services.
Innovation Solution
A method where the AMF sends a UE capability match request to the base station after ensuring the setup of the UE's access stratum security context, allowing the base station to determine UE radio capability match and send an indication of IMS voice over PS session.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station waits for user plane connection setup before acquiring UE radio capability, then access stratum security context is properly established, but the UE capability match determination is delayed and IMS voice services cannot be initiated
Solution Approach 1:
The base station performs the UE capability match determination in advance during the registration procedure, before the user plane connection is fully established. This preliminary action allows the capability check to occur while the access stratum security context is being set up, eliminating the waiting period and enabling timely IMS voice service initiation.
2Reliability
If the base station requires AS security context setup before capability acquisition, then security requirements are met, but the UE capability match check cannot be performed during registration
Solution Approach 1:
The base station initiates the UE capability match determination during the registration procedure itself, performing the capability check as a preliminary action before the user plane connection is complete. This integration of capability checking into the registration flow allows security requirements to be met while maintaining efficient service initiation.
3Ease of manufacture
If the base station does not set up AS security context without user plane connection, then the procedure follows standard protocol, but the UE radio capability cannot be acquired for capability matching
Solution Approach 1:
The base station performs the UE capability match determination as a preliminary action during registration, acquiring the necessary UE radio capability information before the user plane connection is fully established. This approach maintains protocol compliance by following the registration flow while ensuring capability information is obtained in time for service initiation.
Data Source
AI summary
Embodiments of the present application provide methods for checking UE capability match, an AMF, a base station, and a storage medium. The method includes: determining to send a UE capability match request to a base station during a registration procedure initiated by the UE; sending a request for setting up a UE's access stratum (AS) security context to the base station, and sending the UE capability match request to the base station after it is determined that the base station completes setup of the AS security context; receiving a UE capability match acknowledgement returned from the base station. By the method according to the embodiment of the application, the problem that the base station does not respond to the UE capability match process requested by the AMF, which results in that the AMF cannot issue an indication of IMS voice over PS session to the UE during the registration process.