METHOD AND APPARATUS FOR OBTAINING SECURITY KEY IN RELAY SYSTEM Russian patent published in 2014 - IPC H04W12/04 H04L9/14 G06F21/62 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering. The method of obtaining a security key in a relay system, wherein a node in a relay system obtains an initial key, in accordance with the initial key, the node obtains a root key of the security key of the radio interface between the node and another node adjoining said node, and in accordance with the root key, the node obtains a security key of the radio interface between the node and said other adjoining node. Therefore, in accordance with the initial key, each lower-level node obtains a root key of the security key of the radio interface between each lower-level node, such that UE data on an interface link Un can be secured accordingly.

EFFECT: effective data security in each radio interface segment.

12 cl, 11 dwg