FIELD: radio engineering, communication.
SUBSTANCE: invention relates to a mobile communication method, a relay node and a radio base station. The method includes the following steps: generating, by a radio base station, a key KRRC enc, a key KRRC_int, and a key KUP_enc, in a radio zone between relay nodes; generating, by the radio base station, similar to the keys KRRC_enc, KRRC_int and KUP_enc, a key for performing integrity protection in a data radio bearer in the radio zone, in a security mode command process performed when connecting the relay node; generating, by the relay node, a key KRRC_enc, a key KRRC_int and a key KUP_enc, in the radio zone; and generating, by the relay node, similar to the keys KRRC_enc, KRRC_int and KUP_enc, a key for performing integrity protection in the data radio bearer in the radio zone, in the security mode command process performed when connecting the relay node.
EFFECT: improved security for S1AP/X2AP layer signalling, which is transmitted and received in a radio zone Un.
4 cl, 7 dwg
