Aim/Objective:

The project aim is to design a system that replaces standard Bluetooth Device Discovery model to detect nearby mobile services, our system relies on machine-readable visual tags for out-of-band device and service selection. The system designed develops unique coded visual tags for end-to-end mobile discovery. The project is designed to overcome issues of large discovery time, high power consumption in Mobiles due to excessive Bluetooth usage.
The system uses anonymous method for sharing the files with the desired mobile in a multi user environment. This project demonstrates that tag-based connection-establishment technique offers order of magnitude time improvements over the standard Bluetooth Device Discovery model and significantly easier to use in a variety of realistic scenarios. The overall aim is designing a novel technology that works more efficient than Bluetooth for discovering mobile devices.

Broad Research Area:

Wireless Networks and Mobile Computing.


Research Methodology :
In the following phases involved in sharing services between any two end-to-end mobiles the Bluetooth model is replaced by Visual Tag based Model developed in this project.
1. Inquiry Phase: A Mobile user inquires whether device with the appropriate features and services are available.
2. Device Discovery: A Mobile user identifies the specific user with necessary services in a Multi user environment.
3. Services Selection: A Sender lists the services available for sharing and the receiver selects the required service.

Existing Scenario
In the existing environment, the sender switches on Bluetooth in his/her phone. Then sender searches for receiver which has to be listed in his/her phone. The sender selects the appropriate user and waits for permission from the receiver. The sender sends the required file to be shared to the receiver. The file is transferred to the receiver via Bluetooth.
SHORTCOMINGS:
1. High Response Time: Though Bluetooth is efficient for file transfer. The scroll down time and device discovery time required to find out the required device in a multi user environment is large. In today’s fast world, this delay is very much significant and important.
2. High Power Consumption: The power consumed in mobiles for working with blue tooth is virtually large. So working for long hours with Bluetooth for file transfer is practically not feasible in many cases.
3. Handling Users With Same Names: The Bluetooth enabled phones is available with almost all mobile Phones. There may be cases of a many users having the same name for their Bluetooth profiles. It may cause confusion and may result in file transfer to inappropriate user.
Proposed Scenario:
In the system that is to be developed, we are designing a 2 dimensional binary bits coded tag containing device address which is unique for each mobile device. The tag reader is a MIDP application that has to be embedded in the receiver. The receiver has to focus on the tag of the sender through his camera lens. The tag reader software of the receiver decodes the device address in the tag. Then the permission is obtained for the necessary file transfer. The file is transferred via the Bluetooth to the appropriate receiver.

Key points of Proposed Scenario:
Reduced Discovery Time: The device discovery time is greatly reduced. The discovery time is 13.57 seconds when used with Bluetooth whereas it is 0.56 seconds in the proposed system.
Out of Band Device Selection: The binary coded visual tags can be used for message transfer in devices that need not be Bluetooth device (Web server, Stock Querying, Game Vending Machine).
Anonymous Device Selection: The sender and receiver have their Bluetooth device name abstracted from each other. When there are multiple users in single environment, selecting the device by name may be tedious.
Very Much Commodity Software: The proposed system is very much useful in today’s Mobile phone. It can be easily implemented in the Camera Phones.
A Unique feature: The visual tag technology is an attractive and unique for all camera mobile phone users.

VISUAL TAGS:
There are two different types of tags that are being tried out in this project. They are Circular Tags and Rectangular tags. The one that performs well to the test cases and integrates well with the application will be decided in the final stages of the project. The key difference is the shape and encoding procedure used. The visual tags contain the message/information in binary form ie., bits 0 &1. These tags are in machine readable form. The tags can serve a variety of purposes and not restricted to be used for application mentioned in this project.