| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: invention relates to a mobile communication method which includes transmitting and receiving S1AP/X2AP layer signals via a data ratio bearer (DRB) established between a radio base station DeNB and a relay node (RN). The mobile communication method includes a step where a DRB is established during a RN connection process and a step where the radio base station DeNB notifies the RN information indicating a DRB for each radio bearer from a plurality of established radio bearers, and a flag indicating whether there is need to perform integrity protection for said DRB using an information element specified in a RRC (RRC Connection Reconfiguration) message; and a step where the radio base station generates a key for performing DRB integrity, for which there is need to perform integrity protection, in a safe mode command procedure performed during the RN connection process.EFFECT: enabling identification of a DRB for which there is need to perform integrity protection.3 cl, 11 dwg |
