5G V2X Authorization via NAS Capability Indication
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Solution Overview
Problem
The authorization of User Equipment (UE) to use Fifth Generation (5G) systems for Vehicle-to-Everything (V2X) communication remains suboptimal, lacking efficient methods for ensuring proper authorization and resource management.
Innovation Solution
The proposed solution involves a process where UE includes its 5G V2X capability in NAS messages to Mobility Management Entities (MME) or Access and Mobility Management Functions (AMF), which determine authorization based on subscription information from Home Subscriber Servers (HSS) or Unified Data Management (UDM), and include authorized V2X services in S1AP or N2 messages to Access Networks, ensuring proper resource management and authorization across various procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional authorization methods are used for V2X communication in 5G systems, then existing network procedures can be maintained, but authorization efficiency and resource management remain suboptimal
Solution Approach 1:
The patent applies preliminary action by incorporating V2X capability indication in NAS messages during the initial registration procedure. The MME/AMF determines authorization based on subscription information before the UE actually needs to perform V2X communication, thereby preparing authorization in advance and improving efficiency without compromising reliability
Solution Approach 2:
The patent segments the authorization process by separating V2X capability indication from general network capability information. The UE includes specific V2X capability in NAS messages, and the network handles V2X authorization separately through dedicated indication fields in S1AP/N2 messages, allowing independent optimization of V2X authorization while maintaining other network functions
2Reliability
If V2X capability is not specifically indicated in network procedures, then message overhead is reduced, but unauthorized V2X communication cannot be prevented
Solution Approach 1:
The patent extracts V2X capability indication from general network capability information and transmits it separately in NAS messages. This allows the network to specifically identify and process V2X authorization requirements, ensuring security while minimizing unnecessary information transmission. The extracted V2X capability is then used to generate specific authorization indications in subsequent signaling
Solution Approach 2:
The patent introduces an intermediary mechanism where the MME/AMF acts as a mediator between the UE's V2X capability and the Access Network's authorization requirements. The MME/AMF receives V2X capability indication, determines authorization based on subscription information, and includes authorized V2X services in S1AP/N2 messages to the Access Network, thereby securely transmitting authorization information without exposing detailed capability data
3Reliability
If comprehensive authorization checks are performed for all network procedures, then authorization security is improved, but processing time and network latency increase
Solution Approach 1:
The patent performs comprehensive authorization checks in advance during the registration procedure and tracking area update procedures. The MME/AMF determines V2X authorization based on subscription information before the UE needs to access V2X services, so that subsequent V2X communication can proceed without repeated comprehensive checks, reducing latency while maintaining security
Solution Approach 2:
The patent implements dynamic authorization handling where the level of authorization checking adapts based on the network procedure and UE state. Comprehensive checks are performed when registration or subscription information changes, while simpler verification is used during routine operations, optimizing the balance between security and processing time
Data Source
AI summary
One or more techniques of authorizing vehicle-to-everything (V2X) in a wireless network are set forth herein. In one example, during an initial registration procedure or an attach procedure, a UE includes its fifth generation (5G) V2X capability in a Non Access Stratum (NAS) message to a Mobility Management Entity (MME) or an Access and Mobility Management Function (AMF). The MME or the AMF stores this information and determines whether the UE is capable of or authorized to use V2X communication subscription information received from a Home Subscriber Server (HSS) or a Unified Data Management (UDM). If the UE is authorized, the MME or the AMF includes the V2X services authorized in a message from the MME or the AMF to an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN) or a Next Generation Radio Access Network (NG RAN).