Collaboration Application over Bluetooth

1
Collaboration Application over Bluetooth

• Students Yossi Mesika
• Zachi Sharon
• Instructor Mr. Gil Zussman
• Group 16

2
The Previous Project

• This project is based on a previous project that
  was finished last semester.
• In the previous project we implemented a general
  Bluetooth stack that allows upper layer
  applications to communicate with Bluetooth
  devices.
• The stack was designed based on the specification
  and therefore it can be used with various
  Bluetooth devices (e.g. Ericsson, Philips).

3
Objectives

• Build a GUI application that will enable several
  users, with Bluetooth devices connected to their
  PCs, to collaborate with each other.
• Collaboration includes the following features
• Chat
• File Transfer
• Whiteboard

4
Use Case

• Consider a small class lesson of dumb students
  where the teacher explains something by
  demonstrating it on his laptop.
• The teachers whiteboard appears on each
  students computer.
• Students are able to send a question to the
  teacher and get answers by using the chat.
• Students can send and receive educational
  material as files.

5
Application Modules

• The application has been designed to be built
  from several modules.
• The modules that builds the application are
• The GUI part (Using Visual C)
• Collaboration Manager
• Bluetooth Stack
• The GUI part uses the Collaboration Manager that
  uses the Bluetooth Stack as the communication
  interface.

6
Application Modules (cont.)

• The following diagram describes the relations
  between the modules

Graphical Interface
PC or Laptop
Collaboration Manager
Software
Bluetooth Stack
Bluetooth Device
Hardware
7
The Graphical Interface

• Will include the following features
• Whiteboard frame (enabled for master only)
• Chat frame with chat messages from the
  collaboration users and an option to enter a chat
  message.
• Send file button will enable the transition of
  files between the collaboration users.
• Updated list of users who are currently online.
• Get input parameters from the user (e.g. User
  name and communication port where the device is
  connected to).

8
The Collaboration Manager

• Manages all collaboration activities in one
  layer.
• Interacts with the upper layer (GUI) by sending
  events and providing set of functions.
• Interacts with the lower layer (Bluetooth Stack)
  to communicate with the other devices.

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The Collaboration Manager (cont.)

• The collaboration manager uses the ability of the
  Bluetooth stack to open multiple connection and
  multiple channels over single connection.
• Single connection between the master and each
  slave user.
• Three channels over the single connection between
  the slave and master.

10
The Collaboration Manager (cont.)

• There is a single master and several slaves where
  the master has open connection to each one of the
  slaves.
• The three channels over each master-slave
  connection are
• Data Channel File transfer and collaboration
  information (e.g. users lists )
• Chat Channel Chat messages (strings)
• Whiteboard Channel Events from the whiteboard
  frame (e.g. mouse moved, left button clicked,
  etc.)

11
The Bluetooth Stack in Short

• The Bluetooth Stack is built of several layers
  where the upper layer is the L2CAP layer that
  supports multiple connection, multiple channels
  and segmentation / reassembly of large data
  packets received from upper layer and from lower
  layer.
• Lower layer of the Bluetooth Stack (HCI) will
  send commands to the Bluetooth device.

12
Modules Interactions
Graphical Interface
API calls
Events
Collaboration Manager
Data Channel
Chat Channel
Whiteboard
L2CAP Layer
13
What left to be done?

• Test the application with one master and two
  slaves or more than that.
• Run some stress test and fix bugs that will
  appear during the tests.

14
Summary

• The project well introduces the capabilities of
  the Bluetooth stack that was already implemented
  in previous semester.
• The project will demonstrate the use of Bluetooth
  device as replacement for the traditional
  networks and the support of transferring data
  between computers.

15
Thanks !