Patent ID: 7640003
Filing Date: 2009-12-29
Classification: G08B,H04B,H04M,H04W,Y02D

Abstract:
1. A handheld mobile computing and communication device powered by a battery system for use at least as a mobile phone in a normal operation mode and for use as a survivability detecting device when a person is trapped in a disaster situation, the device comprising: (a) a first communication unit providing a means for communicating with another communication device through a public telephone network; (b) a second communication unit providing a means for communicating with another communication device through an ad hoc communication network after said first communication unit is powered off; (c) an accelerometer/gyroscope for detecting motion of said device induced by the trapped person; and (d) a power management unit comprising: whereby said power management unit enables said device to operate for a prolonged period of time by efficiently utilizing the reserved battery power while the trapped person is waiting for the rescue, which maximizes the opportunity that a trapped person is rescued in a disaster situation such as after an earthquake or a terrorist attack.