5G Network Slice

Also known as: 5G slice, End-to-end network slice

A network slice is a logical, end-to-end 5G network instance (RAN, transport, core, and often edge) tailored to a specific service or tenant, identified by an S-NSSAI and managed through NSSF/NSSAAF and orchestrators. Slices share physical infrastructure but must be logically isolated at the control, user and management planes; GSMA FS.40 and 3GPP TS 33.501 define the required isolation, mutual authentication and slice-specific security controls.

Categories: Core NetworkProtocols and StandardsEncryption and Cryptography

Network Slice in context

The mobile core carries subscriber sessions, mobility and policy. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF.

Telecom security is written into standards from 3GPP, GSMA, ETSI, IETF and ITU-T. Understanding which body owns which specification, and how they interlock, is essential for both design and audit work.

To place Network Slice in the wider telecom-security picture, review MEC, NESAS, UDSF, NDR, FS.40 and Network Slicing: each entry cross-references back to this page so you can walk the topic in either direction.

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Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.