JPMA PROJECT PRESENTATION (ITU) 1 INTRODUCTION BLUETOOTH CHAT DESIGN JAVA ON MOBILE DEVICE Presenters Benjamin Boateng Abass Omer Venkateshwar Rao Namilakonda

JPMA PROJECT PRESENTATION (ITU) 2 INTRODUCTION Benjamin Boateng Introduction Bluetooth Achitecture Abass Omer Midlet and Testing Venkateshwar Rao Namilakonda Codes

JPMA PROJECT PRESENTATION (ITU) 3 Bluetooth Achitecture Overview Of Bluetooth Technology Bluetooth-wireless connectivity options for mobile devices characterized by short range and low-power consumption, ad hoc networking. Bluetooth-enabled devices are organized in groups called piconets. A piconet consists of a master and up to seven active slaves. A master and a single slave use point-to-point communication; if there are multiple slaves, point-to-multipoint communication is used.

JPMA PROJECT PRESENTATION (ITU) 4 Bluetooth Achitecture Overview Of BluetoothTechnology The Bluetooth Protocol Stack-high-level view of the architecture:

JPMA PROJECT PRESENTATION (ITU) 5 Bluetooth Achitecture Overview Of Bluetooth Technology The Bluetooth Protocol Stack-high-level view of the architecture: The radio layer : physical wireless connection. The baseband layer: responsible for controlling and sending data packets over the radio link. The Link Manager Protocol (LMP): uses the links set up by the baseband to establish connections and manage piconets. The Host Controller Interface (HCI): the dividing line between software and hardware. The Logical Link Control and Adaptation Protocol (L2CAP): receives application data and adapts it to the Bluetooth format.

JPMA PROJECT PRESENTATION (ITU) 6 Bluetooth Achitecture Overview Of Bluetooth Technology Network Establishment Scheme A device not connected to the piconet is in standby mode. Inquire: the device automatically initiates an inquiry to find an access point. All nearby access points respond with their addresses, and the device picks one. Page: synchronizes the device with the access point. Establish a link: The Link Manager Protocol establishes a link with the access point. Discover services: The LMP uses the Service Discovery Protocol (SDP) to find out what services are available from the access point. Here we assume that the service is available. Create an L2CAP Channel: The LMP uses information obtained from the Service Discovery Protocol (SDP) to create an L2CAP channel to the access point.

JPMA PROJECT PRESENTATION (ITU) 7 Bluetooth Achitecture Overview Of Bluetooth Technology Network Establishment Scheme Create an RFCOMM channel: Depending on the needs of the application, an RFCOMM channel (or another channel) is created over the L2CAP channel. Authenticate: requires input from the user. If the access point requires authentication, it will send an authentication request, and the user will be prompted to enter a PIN to access the service. Log in: If the device use the Point-to-Point Protocol (PPP) over RFCOMM, a serial port is emulated. Send and receive data: The client and the access point now use standard network protocols like TCP/IP to send and receive data.

JPMA PROJECT PRESENTATION (ITU) 8 Bluetooth Achitecture Overview of Our Application Midlet-based chat application using server and client Bluetooth applications start the device discovery process it searches and discover any existing bluetooth enabled device in the same piconet within the Bluetooth effective range. service discovery process then starts to obtain a reference (URL) to suitable services.

JPMA PROJECT PRESENTATION (ITU) 9 Bluetooth Achitecture Key Steps Forming the Bluetooth Application Design Device discovery DiscoveryAgent class and DiscoveryListener interface provide the necessary discovery services. DiscoveryAgent startInquiry method. Places the device in question into an inquiry mode. The application specifies an event listener that will respond to inquiry-related events. DiscoveryListener.deviceDiscovered is called each time an inquiry finds a device.

JPMA PROJECT PRESENTATION (ITU) 10 Bluetooth Achitecture Service Discovery After discovery of at least one remote device, device can begin to search for available services. Communication Server: constructs an URL placedin the service record. Initiates a service discovery, retrieves the service record, construct a connection URL using the service record, Opens a connection to the server as well as send and receive data to and from the server.

JPMA PROJECT PRESENTATION (ITU) 11 Dictionary Based Typing Bluetooth Achitecture

JPMA PROJECT PRESENTATION (ITU) 12 Bluetooth Achitecture Address Book