公开(公告)号：US12167301B2

公开(公告)日：2024-12-10

申请号：US17725191

申请日：2022-04-20

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yun-Sun Baek ,  Nishant Gupta ,  Kill-Yeon Kim ,  Duk-Gu Sung ,  Jae-Woong Lee

IPC: H04W4/10 ,  H04L65/403 ,  H04L65/4061 ,  H04W4/08 ,  H04W76/45 ,  H04W76/50 ,  H04W84/18

Abstract: Provided is a method performed by a terminal of performing communication, the method including generating a private call setup request message including a call identifier information element (IE), a caller IE, a callee IE, and a call type IE set to an emergency private call, based on receiving a user indication to upgrade a call to emergency call, wherein the terminal is in an in-progress private call state; setting a proximity-based services (ProSe) per-packet priority corresponding to the emergency private call; transmitting, to another terminal, the private call setup request message; starting a timer relating to private call request retransmission based on the emergency call setup request message; and entering an in-progress emergency private call state from the in-progress private call state.