3GPP TS 22.30U – Service requirements on security 3GPPTS22_series22.30U SPECIFICATION WITHDRAWN Related SpecTS 22.340 IP Multimedia Subsystem (IMS) messaging; Stage 1TS 22.346 Isolated Evolved Universal Terrestrial Radio Access Network (E-UTRAN) operation for public safety; Stage 1TS 22.368 Service requirements for Machine-Type Communications (MTC); Stage 1