3GPP 23.501 v20.2.0 — the document's own text
5.15.15.1 General
Taught in 17. One network, many networks (The 5G system architecture, in depth), 6. One network behaving like several (The 5G system architecture, overview).
Network Slice usage control is achieved as follows:
- Configuring network-controlled Slice Usage Policy to supporting UEs (see clause 5.15.15.2).
- Configuring PDU Sessions inactivity timers and Network Slice deregistration inactivity timers (see clause 5.15.15.3).
NOTE: The use of Network Slice Usage Control while roaming is not supported in UE and VPLMN, i.e. no timers are configured in the UE and VPLMN in this Release of the specification. However, for Home Routed PDU sessions, PDU Session inactivity timer can be configured in the H-UPF based on operator policy.
Subject to operator policy and national/regional regulations, the AMF ensures that Network Slice usage control does not apply to a Network Slice used for Emergency services.