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Motion triggered method for a mobile device to discover peers Disclosure Number: IPCOM000216754D
Publication Date: 2012-Apr-17
Document File: 2 page(s) / 20K

Publishing Venue

The Prior Art Database


Proposed is a method to execute, for a smartphone device provided with local wireless communication apparatus like Bluetooth or equivalent and an accelerometer sensor, a scan to find peers only when a new steady state is reached, in order to reduce battery consumption that happen in normal scans that are executed typically with a prefixed frequence (for instance, a new scan each 30 seconds).

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Motion triggered method for a mobile device to discover peers

Smartphone devices are, nowadays, normally provided with different radio apparatus, to support different wireless technologies. One of those technologies is the Bluetooth, useful to local short-ranged communication, in order to exchange data and information with peers located nearby.

In order to find peers nearby (to be then able to communicate and exchange data with them), a person provided with a smartphone with Bluetooth (or equivalent) enabled, needs to execute an operation called "inquiry", that allows to scan the local area looking for peers. When an inquiry is executed by an user, each other person (provided with a device having Bluetooth enabled) that is nearby, will respond to the inquiry prodiving a personal identifier string.

At the end of this scan, the person is able to get the list of peers retrieved nearby, and to start communicating and exchanging data with them. This method is normally executed in 2 distinct cases:

a) manually triggered by the user (user will launch a Bluetooth inquiry when he/she needs to do this);

b) with some frequency (user enables a refresh period, for instance 30 seconds, so that each 30 seconds a new inquiry is launched).

First method requires the person to manually execute the scan; this can be unconfortable for the user, as he/she needs to manually manage the scan for peers, then everything is on his/her charge.

The second method is automated and effective, but it affects the energy consumption, because a scan triggered with a very high frequency (for instance, 10 seconds), will require a lot of energy and will quickly consume all the phone battery, leading the phone to a forced turn off (no enough battery remaining). In addiction, the method is not smart, because if user forgets to disable the automatic inquiry when it is not needed, the phone will keep on scanning for peers consuming all the battery even when it is clearly not needed (think about a person that leaves this mode inside an isolated place).

The proposed method assumes that a user is provided with a mobile phone provided of:
1 - Accelerometer sensor;
2 - Bluetooth device (or any wireless radio for establishing local connections wi...