公开(公告)号：US12127295B2

公开(公告)日：2024-10-22

申请号：US17652215

申请日：2022-02-23

Applicant: QUALCOMM Incorporated

Inventor： Arun Ashok Tagare ,  Mudit Singh ,  Abhishek Shukla

IPC: H04W76/50 ,  H04W36/12 ,  H04W76/10

CPC classification number: H04W76/50 ,  H04W36/125 ,  H04W76/10

Abstract: Aspects presented herein may improve an emergency call establishment procedure by enabling a UE to transmit emergency register messages more efficiently. In one aspect, a UE transmits, to a network entity, a request to set up an ePDN. The UE receives, from the network entity, a response to the request comprising a set of multiple P-CSCF addresses. The UE transmits, to the network entity, a registering message to each of the multiple P-CSCF addresses simultaneously. The UE receives, from the network entity, at least one acceptance message from at least one of the set of multiple P-CSCF addresses in response to the registering message. The UE transmits, to the network entity, an invitation message to a P-CSCF address from which an acceptance message is received to establish an emergency call connection.