公开(公告)号：US20210067972A1

公开(公告)日：2021-03-04

申请号：US16737230

申请日：2020-01-08

Applicant: QUALCOMM Incorporated

Inventor： Charles MCGRATH ,  Subrato Kumar De ,  Ankur Bhattacharjee ,  Krishna Ram Budhathoki ,  Mattias Kaulard Huber ,  Brandon Luu ,  Sai Eshwar Prasad Muppalla

IPC: H04W12/12 ,  H04W4/90 ,  H04W4/06 ,  H04W12/06 ,  H04W4/12

Abstract: Methods for detecting and responding to unauthorized alert messages. In an example embodiment, a wireless device may detect a first system information block (SIB1) broadcast from a base station that includes an alert message flag that indicates that an emergency alert message is scheduled for broadcast in another system information block (e.g., in one of SIBs 10-14, etc.). The wireless device may detect an unauthorized alert based on inconsistent inputs from various base stations, and the server may detect fake or unauthorized base stations or detect unauthorized alerts based on inconsistent inputs from various UEs about same Cell ID, or same PLMN and geolocation, etc.