SECURITY KEY EXTRACTION DURING DUAL CONNECTION Russian patent published in 2021 - IPC H04L29/06 H04W12/04 H04W76/15 H04W76/19 

FIELD: wireless communication.

SUBSTANCE: communication device contains: a receiver made with the possibility of receiving an increased novelty counter from a leading base station during operation, wherein the increased novelty counter is prepared in response to a request for changing a secondary security key from a secondary base station, when a counter value (COUNT) exceeds a threshold value, wherein the secondary security key is a security key for the secondary base station; and a control scheme made with the possibility of extracting an updated secondary security key during operation using the received increased novelty counter and the current active security key of the communication device corresponding to the current active security key of the leading base station, without updating the current active security key of the communication device, and using the extracted updated secondary security key in a communication line with the secondary base station.

EFFECT: providing an updated secondary security key for the secondary base station.

17 cl, 16 dwg