Implementation of SeamlessTalk Application

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SeamlessTalk is an in-car mobile phone hands-free system intended to manage

sustained car conversations. The prototype system was developed as a

component of the infotainment system of the new Saab 9-3 car (see Figure 1

and Figure 2).

SeamlessTalk consists of four main components (see Figure 3): A Bluetooth

enabled mobile phone, an in-car phone resource system, a service layer, and

an infrastructure layer.

First, the system requires a Bluetooth equipped mobile phone. In its current

version, the system supports the Nokia 6310i and Nokia 6550 (a 3G terminal).

Second, the system includes an in-car phone resource system intended to

provide the resources needed for enhancing the convenience and safety of car

conversations. It consists of four components: dashboard control buttons, a 5.8

Figure 1. The dashboard of a Saab 9-3 equipped with the infotainment

system

inches screen integrated in the dashboard, a microphone, and an in-car audio

system. Third, the system comprises a service layer that defines the session

management considerations. This layer handles establishment of phone calls,

maintenance of running sessions, handover of calls between the phone and the

in-car resources, and termination of sessions. Fourth, the system comprises an

infrastructure layer. This layer makes it possible for the different components

of SeamlessTalk to communicate and co-exist. One important component of

this layer is the Bluetooth access point provided by the car’s infotainment

Figure 3. The components of SeamlessTalk

Figure 2. The main menu of the infotainment system

In-car phone resource system

dashboard control

buttons

5.8 inches screen

microphone

in-car audio system

Bluetooth

equipped

mobile

phone

1. 2.

Service layer

Infrastructure layer

3.

4.

1. 2.

3.

4.

system. This access point is necessary to establish ad hoc connections to paired

mobile phones. The prototype uses the standard Bluetooth ad hoc networking

protocol with the service discovery protocol and the hands-free profile.