Section: 4.11 Satellite access for CIoT 4.11.1 General
Content: The UE and the network may support a satellite E-UTRAN access in WB-S1 mode or NB-S1 mode with CIoT EPS optimization. Support for satellite E-UTRAN access is specified in 3GPP TS 36.300[ Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 ]  [20]. An MME can determine a UE is accessing the network using a satellite E-UTRAN access and may enforce mobility restriction for the UE as specified in 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [10]. If unavailability period is activated due to discontinuous coverage (see 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [10]), all NAS timers are stopped and associated procedures aborted except for T3412, T3346, T3396, T3447, T3448, any backoff timers, T3245, T3247, the timer T controlling the periodic search for HPLMN or EHPLMN (if EHPLMN list is present) or higher prioritized PLMNs, and the timer TSENSE controlling the periodic search for PLMNs satisfying the operator controlled signal level threshold (see 3GPP TS 23.122[ Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode ]  [6]) and the UE may deactivate access stratum.