Apparatuses and methods for providing assistance information for calls under isolated E-UTRAN operation for public safety (IOPS)

摘要

A mobile communication device including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a service network. The controller determines whether the service network is an Isolated E-UTRAN Operation for Public Safety (IOPS) network, and transmits a first ATTACH REQUEST message including an IOPS indicator to the service network via the wireless transceiver in response to the service network being an IOPS network. Also, the controller receives a first ATTACH ACCEPT message including encrypted mapping information from the service network via the wireless transceiver, and transmits a first ATTACH COMPLETE message to the service network via the wireless transceiver.