Generic Public Subscription Identifier

In Release 15, the GPSI function was newly introduced to replace the PUI (Private User Identity) as a standardized external identifier for a subscription. This change was part of broader enhancements for subscription data management, including the retrieval of SMS management subscription data and subscription to resource allocation outcomes. The release also defined procedures for subscription and notification of events like out-of-credit conditions, integrating GPSI within these exposure and service frameworks.

• Nudm_SDM retrieval of SMS Management Subscription data TS 29.503CR0037
• Subscription and notification of resources allocation outcome, data model TS 29.514CR0007
• Subscription to resources allocation outcome, service procedures TS 29.514CR0008
• Subscription and notification of out of credit events, data model TS 29.514CR0010
• Subscription to out of credit notification, service procedures TS 29.514CR0011
• Subscription for Structured Data for Exposure TS 29.519CR0022

+ 80 more changes

In Release 16, the GPSI function was expanded to serve as a key identifier for Unmanned Aerial Vehicles (UAVs) within the 5G system for UAS traffic management. Specifically, the GPSI is now formally defined as a valid identifier for a UAV (UAV ID) and can be used within UAS-related procedures such as registration, C2 communication mode management, and C2 operation mode switching. This integration enables the network to uniquely identify and manage UAV subscriptions and their associated command and control links.

• TS 23.501: Introducing Non-public network TS 23.501CR0734
• Introducing support for Non-Public Networks TS 23.501CR0757
• Introducing Non-public network TS 23.501CR0734
• SUPI and SUCI for wireline access TS 23.501CR0744
• Introduction of the MSISDN-less MO SMS Service TS 23.501CR0826
• FQDN format of N3IWF in a standalone non-public network TS 23.501CR0841

+ 107 more changes

In Release 17, the GPSI function was extended to support new Uncrewed Aerial System (UAS) use cases, specifically for uniquely identifying a UAV or UAV-C. The GPSI is explicitly defined as a valid form for the UAV Identifier (UAV ID), enabling subscription and service procedures for aerial UEs. Furthermore, the concept of dual subscription functionality was introduced, allowing a UAS to operate with links belonging to the same or different networks.

• SNPN with separate entity hosting subscription TS 23.501CR2625
• IMSI based SUPI support when access an SNPN using credentials owned by CH TS 23.501CR2919
• Format of SUCI/SUPI used for Onboarding TS 23.501CR3097
• Authentication and Subscription information checking for Disaster Roaming service TS 23.501CR3251
• Add 5G DDNMF and ProSe Subscription Data TS 29.503CR0613
• Identifier Translation TS 29.503CR0654

+ 132 more changes

In Release 18, the GPSI function was enhanced to support new Unmanned Aerial System (UAS) subscription and service capabilities. Specifically, new subscription data and procedures were introduced for managing Command and Control (C2) communication modes, including C2 operation mode management and switching between network-assisted and UTM-Navigated links. Furthermore, the release defined subscription mechanisms for dual connectivity scenarios, allowing a UAS to utilize links from the same or different networks based on subscription functionality.

• VAL service area identifier usage TS 23.434CR0136
• Adding time synchronization service based on subscription TS 23.501CR3762
• PIN identifiers TS 23.501CR4287
• EDGE-5 – Subscription TS 23.558CR0152
• Updating UE Identifier API procedure to enable EEC invoke UE ID request for NATed IP address TS 23.558CR0156
• Subscription for service provisioning information retrieval by ECS TS 23.558CR0316

+ 122 more changes

In Release 19, the GPSI function was enhanced to support the conversion of multiple SUPIs to a single GPSI within the UDM, and to allow for AF-specific identifier selection during this translation. Furthermore, subscription data was expanded to include new parameters such as an Energy Saving Indicator for UEs and Required/Preferred UPF functionalities. The release also introduced support for MSISDN verification operations within the Nnef_UEId service.

• Add Geofencing subscription/unsubscribe procedure TS 23.434CR0306
• Subscription-based routing to a target core network TS 23.501CR5380
• Enhancement of getting public UE IP address and port number TS 23.501CR5445
• Supporting direct subscription of UPF event exposure using UE's IP address TS 23.501CR5540
• KI#2: UE subscription and policy control for energy efficiency and energy saving TS 23.501CR5739
• Updates to UPF data exposure for KI#2 direct subscription TS 23.501CR5452

+ 99 more changes