公开(公告)号：US10159057B1

公开(公告)日：2018-12-18

申请号：US15612832

申请日：2017-06-02

Applicant: APPLE INC.

Inventor： Utkarsh Kumar ,  Lakshmi N. Kavuri ,  Samuel J. Miller ,  Harshit Chuttani ,  Rohan Malthankar ,  Francisco Gonzalez

IPC: H04W60/04 ,  H04W88/02 ,  H04W8/18

Abstract: A device, system, and method persists network registration rejection causes. The method is performed at a device connected to a network and comprising a temporary memory and a persistent memory, the device using the data stored in the temporary memory when performing network registration operations. When a power cycle is detected, the method includes determining whether there is persistent data in the persistent memory for a first attempt to register with the network prior to the power cycle, the persistent data including a rejection cause for the first attempt. When there is the persistent data in the persistent memory, the method includes determining whether the persistent data is valid for a second attempt to register with the network after the power cycle. When the persistent data is valid, the method includes generating and storing cause data based on the persistent data in the temporary memory prior to the second attempt.