· The network uses the EMM INFORMATION message to provide the UE with certain information such as network name, local time etc…
· The EMM INFORMATION message implementation is optional in both network and the UE
· The EMM information procedure may be invoked by the network at any time during an established EMM context
· During an established EMM context, the network may send none, one or more EMM INFORMATION messages to the UE. If more than one EMM INFORMATION messages are sent to the UE, then the messages need not have the same content
· After receiving this message, the UE if it supports EMM INFORMATION message, shall accept the message and optionally use the contents to update appropriate information stored within the UE
· If the UE does not support the EMM INFORMATION message, then the UE shall ignore the contents of the message and return an EMM STATUS message with EMM cause #97 "message type non-existent or not implemented"
· The IE Full name for network indicates the "full length name of the network" that the network wishes the UE to associate with the MCC and MNC contained in the last visited TAI
· The IE Short name for network indicates the "abbreviated name of the network" that the network wishes the UE to associate with the MCC and MNC contained in the last visited TAI
· If the network includes the IE Local Time Zone, The UE should assume that this time zone applies to the tracking area of the current cell, and also applies to the tracking area list (if available) in the UE
· Universal time and local time zone IE may also be sent by the network. The UE should assume that this time zone applies to the tracking area the UE is currently in, and also applies to the tracking area list (if available) in the UE. The UE shall not assume that the time information is accurate
· If the local time zone has been adjusted for daylight saving time, the network shall indicate this by including the Network daylight saving time IE
Reference 3GPP TS 24.301
Example: EMM INFORMATION message
