1. QoS for Fixed and Mobile Ultra‐Broadband
2. NGN Architectures, Protocols and Services
3. ITU‐T Rec. Y.4000/Y.2060 “Overview of the Internet of things” June 2012.
4. 3GPP TS 23.501 V18.2.2 “System Architecture for the 5G System (5GS); Stage 2 (Release 18)” July 2023.