MOBILE COMMUNICATION METHOD AND MOBILE COMMUNICATION SYSTEM

摘要

A mobile communication method comprises: a step in which an exchange station (MME) transmits, in response to a received "Attach Request", a signal of "Attach Accept" including a KeNB to a relay node (RN); a step in which the relay node (RN) notifies the KeNB to a radio base station (DeNB) without storing the KeNB; a step in which the radio base station (DeNB) generates, based on the notified KeNB, a K_RRCint, a K_RRCenc and a K_UPenc and notifies only the K_RRCint and K_RRCenc to the relay node (RN); and a step in which the relay node (RN) stores the notified K_RRCint and K_RRCenc.