Patent ID: 11930355
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A method performed by a user data management (UDM) for a first communication system, in a wireless communication system, comprising:
receiving, from an access and mobility management function (AMF), a request message for security of a second communication system for the first communication system; and
transmitting, to the AMF, a response message including a security key for an eNB of the second communication system,
wherein the security key is obtained from a base security key of the second communication system,
wherein the base security key is associated with a security key of the first communication system,
wherein the first communication system is associated with a new radio (NR) based network, and
wherein the second communication system is associated with a long term evolution (LTE) based network,
wherein the security key of the first communication system is associated with KAMF or KSEAF,
wherein the base security key is associated with KASME, and
wherein the security key for the eNB is associated with KeNB.