V2X Network Slice Support Via PC5 Authorization
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Solution Overview
Problem
The existing technologies are unclear on how to restrict UE access to network slices for V2X communication via the PC5 interface, especially when the UE is not authorized by the network slice owner, and how to manage network slice resources effectively for V2X services.
Innovation Solution
The method involves transmitting allowed network slice selection assistance information (NSSAI) associated with a vehicle-to-everything service, receiving and transmitting PC5 quality-of-service (QoS) parameters, and determining validity areas to manage UE access and resource allocation for V2X communication, ensuring authorized use of network slices via the PC5 interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network slice resources are made available for V2X communication via PC5 interface, then V2X service capability is improved, but unauthorized UE access and resource misuse risks increase
Solution Approach 1:
The system performs preliminary authentication and authorization of UEs before allowing access to network slice resources for V2X communication. The AMF authenticates the UE and obtains authorized S-NSSAI information, then the PCF performs authorization to determine allowed S-NSSAI and PC5 QoS parameters before resource allocation. This preliminary action prevents unauthorized access while enabling legitimate V2X services.
Solution Approach 2:
The patent introduces intermediary network functions (AMF and PCF) that mediate between UEs and network slice resources. The AMF acts as an authentication intermediary, verifying UE credentials and obtaining authorized slice information. The PCF acts as an authorization intermediary, determining which slices the UE can access and what QoS parameters apply. These intermediaries enable secure resource access while maintaining service capability.
2Productivity
If network slice selection assistance information is transmitted to multiple network nodes, then service delivery is improved, but information consistency and security management complexity increases
Solution Approach 1:
The patent segments the network slice selection assistance information into different components and transmits them to different network nodes according to their specific needs. The AMF receives authorized S-NSSAI information from the authentication process, while the PCF receives allowed S-NSSAI and PC5 QoS parameters from the authorization process. The RAN node receives only the specific S-NSSAI and QoS parameters needed for radio resource management. This segmentation improves service delivery while reducing information consistency complexity.
3Reliability
If PC5 QoS parameters are enforced for V2X communication, then communication quality is improved, but network control overhead and complexity increases
Solution Approach 1:
The patent applies local quality by providing specific PC5 QoS parameters tailored to each UE's authorized network slices and V2X service requirements. Instead of uniform QoS control, the system determines allowed S-NSSAI and specific PC5 QoS parameters (such as priority, packet error rate, latency, bit rate) based on individual UE authorization. The RAN node then enforces these localized QoS parameters for radio resource management, improving communication quality while keeping control overhead manageable through targeted rather than universal control.
Data Source
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AI summary
A wireless communication method for use in an access and mobility management function is disclosed. The wireless communication method comprises transmitting, to a policy control function, PCF, allowed network slice selection assistance information, NSSAI, associated with a wireless terminal.