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VoLTE, VoWifi and Mission Critical Communication 391

27 3GPP, Architecture enhancements for non‐3GPP accesses, TS 23.402.
28 3GPP, 3GPP System Architecture Evolution (SAE); Security aspects of non‐3GPP
accesses, TS 33.402.
29 D. Black et al., Using Authenticated Encryption Algorithms with the Encrypted Payload
of the Internet Key Exchange version 2 (IKEv2) Protocol, IETF RFC 5282.
30 3GPP, 3GPP System Architecture Evolution (SAE); Security aspects of non‐3GPP
accesses, TS 33.402.
31 P. Eronen et al., An Extension for EAP‐Only Authentication in IKEv2, RFC 5998.
32 H. Schulzrinne et al., RTP Profile for Audio and Video Conferences with Minimal
Control, RFC 3551 Chapter 6.
33 K. Majithia, EE Wins 4G contract for UK Emergency Services, Mobile World Live,
2015, http://www.mobileworldlive.com/featured‐content/home‐banner/
ee‐wins‐1b‐contract/.
34 FirstNet, First Responder Network Authority, http://firstnet.gov/network.
35 3GPP, Functional architecture and information flows to support mission critical
communication services; Stage 2, TS 23.179.
36 3GPP, Mission Critical Push to Talk (MCPTT) group management; Protocol
specification, TS 24.381.
37 3GPP, Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional
description, TS 23.246.
38 3GPP, Policy and charging control architecture, TS 23.203.