Patent ID: 8886157

Claim:
A mobile device comprising: a display device; a user interface to receive an emergency mode request from a user; a processor configured to execute instructions to implement an emergency mode process based upon the receipt of the emergency mode request from the user, the emergency mode process to: monitor received signals to locate a base station, wherein once a base station is located, a short emergency message is transmitted to the base station including the location of the mobile device and inputted text data from the user; monitor received signals to receive an acknowledgement signal acknowledging receipt of the short emergency message from the base station; reduce a plurality of first non-essential functions of the mobile device to reduce power consumption once the acknowledgement signal acknowledging receipt of the short emergency message from the base station is received; enter an emergency sleep mode to further reduce power consumption once the acknowledgement signal acknowledging receipt of the short emergency message from the base station is received; and after the emergency sleep mode is entered, transmit a new location to the base station if the location of the mobile device has changed; and a memory configured to store the instructions.