Section: 5.6.2 Paging procedure 5.6.2.1 General
Content: The paging procedure is used by the network to request the establishment or resumption of a NAS signalling connection to the UE. Another purpose of the paging procedure is to prompt the UE to reattach if necessary as a result of a network failure. If the UE is not attached when it receives a paging for EPS services, the UE shall ignore the paging. Additionally, the network can use the paging procedure to initiate the mobile terminating CS fallback procedure or SMS or user data transfer via the MME.