Section: 5.3.16 Restriction on use of enhanced coverage
Content: In order to deal with use of extensive resources from the network, the operator may prevent specific subscribers from using enhanced coverage (see 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [10]). When in NB-S1 mode, the UE shall indicate support for restriction on use of enhanced coverage. When in WB-S1 mode, the UE supporting either CE mode A or CE mode B shall indicate support for restriction on use of enhanced coverage. The UE supporting restriction on use of enhanced coverage indicates its support for restriction on use of enhanced coverage in the ATTACH REQUEST and TRACKING AREA UPDATE REQUEST message. If the UE supports restriction on use of enhanced coverage, the MME indicates whether the use of enhanced coverage is restricted or not in the ATTACH ACCEPT message and TRACKING AREA UPDATE ACCEPT message (see clause 5.5.1.2 and clause 5.5.3.2). If the use of enhanced coverage is restricted, the UE shall not use enhanced coverage in the registered PLMN and in any PLMN which is in the list of equivalent PLMNs. If the UE supports CE mode B and the network determines that - the use of enhanced coverage is not restricted for the UE; or - CE mode B is not restricted for the UE; the applicable NAS timer values shall be calculated by the network as described in clause 4.8.