Samsung Electronics Co., Ltd.

Vengataraaman Ramamoorthy

Siva Prasad Gundur

Vijay Sangameshwara

Kiran Gurudev Kapale

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.

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Bengaluru, India

Vengataraaman Ramamoorthy