Section: 5.5.1.2.5C Attach for access to RLOS not accepted by the network
Content: If the attach request for access to RLOS is received by the network and the UE requesting attach is not in limited service state, the MME shall reject the UE's attach request. If the attach request for access to RLOS cannot be accepted by the network, the MME shall send an ATTACH REJECT message to the UE including EMM cause #35 "Requested service option not authorized in this PLMN" or one of the EMM cause values as described in clause 5.5.1.2.5. Upon receiving the ATTACH REJECT message including EMM cause #35, the UE shall enter the state EMM-DEREGISTERED.PLMN-SEARCH and perform a PLMN selection according to 3GPP TS 23.122[ Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode ]  [6] to attempt EPS attach for access to RLOS via another PLMN. Upon receiving the ATTACH REJECT message including one of the other EMM cause values, the UE shall perform the actions as described in clause 5.5.1.2.5. along with the following conditions: a) if the action for the reject involves searching for a suitable cell in E-UTRAN radio access technology, the UE shall proceed with the action and shall attempt to attach for access to RLOS in the new tracking area, if found; and b) if the action for the reject involves attempting to select GERAN or UTRAN radio access technology or disabling the E-UTRA capability, the UE shall skip the action for as long as access to RLOS is still needed. NOTE: How long the UE attempts to access RLOS is up to UE implementation. Then if the UE is in the same selected PLMN where the last attach procedure was attempted and rejected and if timer T3346 is not running, perform a PLMN selection according to 3GPP TS 23.122[ Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode ]  [6] to attempt EPS attach for access to RLOS via another PLMN. If the attach request for access to RLOS fails due to abnormal cases b), c) or d) in clause 5.5.1.2.6, the UE shall perform the procedures as described in clause 5.5.1.2.6 with the exception that the UE shall skip actions that involve attempting to select GERAN or UTRAN radio access technology and actions that involve disabling the E-UTRA capability, for as long as access to RLOS is still needed.