Tracking context of smart handheld devices

The ability to locate wireless devices has many benefits as already mentioned by researchers. These applications include sport tracking, friend finders, security related jobs, surveillance etc. Performance of such security related services and surveillance would significantly improve if in addition to location, context of the user is also known. Thus in this paper, location based service is designed and implemented that utilizes context sensing along with location to track context (location and state of the device user) of a smart handheld in an energy efficient manner. The service can be used for surveillance and to act proactively. It can also be used to track location of individuals (relatives, children) as well as that of lost or stolen device (say, phone)fromany type ofother handheld devices. The service can be initiated securely and remotely(not necessarily from smartphones) thus it does not always work in the background and hence save significant battery power. Once initiated it does not stop even when SIM card is changed or the phone is restarted. The performance analysis shows the efficiency of the application.