公开(公告)号：US20220408230A1

公开(公告)日：2022-12-22

申请号：US17883060

申请日：2022-08-08

Applicant: Samsung Electronics Co., Ltd.

Inventor： Vengataraaman RAMAMOORTHY ,  Kiran Gurudev KAPALE ,  Siva Prasad GUNDUR ,  Vijay SANGAMESHWARA

IPC: H04W4/10 ,  H04W4/90

Abstract: A method for sharing a reason cause for a mission critical communication (MCX) communication over pre-established session in an MCC network is provided. The method includes transmitting, to the server, a call initiation request to initiate a call, wherein the call initiation request includes first information on a session type and second information on a resource list, receiving, from the server, a mission critical pre-established session control (MCPC) connect message including a security message, determining whether an authentication for the security message is successful, and transmitting, to the server, a first MCPC acknowledgement message including a reason cause field to inform a reason for terminating the call in response to determining that the authentication for the security message is not successful.

公开(公告)号：US20210392468A1

公开(公告)日：2021-12-16

申请号：US17250956

申请日：2019-10-16

Applicant: Samsung Electronics Co., Ltd.

Inventor： Siva Prasad GUNDUR ,  Vengataraaman RAMAMOORTHY ,  Karthik NARAYANAN

IPC: H04W4/08 ,  H04W4/90 ,  H04W12/041 ,  H04W12/037 ,  H04W12/0431

Abstract: According to an embodiment of the present disclosure, a method of key-management by a group management server in Mission Critical Systems (MCX) between an initiating party and a receiving party is provided. The method comprises generating a master key, the master key being designated for an ad-hoc communication, allocating an identifier to the generated master key, and transmitting a transmission message signed by an initiating MCX entity including the master key to a receiving MCX entity.