公开(公告)号：US20210227437A1

公开(公告)日：2021-07-22

申请号：US17154582

申请日：2021-01-21

Applicant: Apple Inc.

Inventor： Vijay Venkataraman ,  Srinivasan Nimmala ,  Longda Xing ,  Kavya B. Ravikumar ,  Krisztian Kiss ,  Yifan Zhu ,  Murtaza A. Shikari ,  Robert K Kitchens ,  Haijing Hu ,  Robert Zaus

IPC: H04W36/14 ,  H04W4/90 ,  H04W48/02 ,  H04W60/04

Abstract: Apparatuses, systems, and methods for performing efficient emergency services fallback. A cellular network element may provide emergency services fallback information to a wireless device during 3GPP 5GS cellular registration. The emergency services fallback information may include an indication of whether emergency services fallback via fallback to evolved packet core service is supported. The emergency services fallback information may also include an indication of whether emergency services fallback via fallback to circuit switched service is supported.