Abstract
Imagine a scenario in a conference room. The boss is about to hold a seminar for his employees. He is using Bluetooth to connect his laptop to the overhead projector. The boss' laptop becomes a master in a Bluetooth piconet, and the projector becomes a slave.
All participants bring their own laptop to the meeting. Their laptops automatically connect as slaves to the piconet. If the number of participants is more than six, one of the slave laptops also b 848o1413i ecomes a master for another piconet. Now the conference room is a wireless LAN, existing of two piconets, forming a scatternet.
It could also be an advantage if all subscribers in the scatternet would have access to Internet. That could be done if the conference room contained a wireless Internet access point.
In some cases many people take part in these meetings. In those cases it would be convenient if all the participants were having a headset including both a microphone and an earphone. In that case the speaker wouldn't have to scream to reach out to the listeners.
The participants start the seminar by downloading the power point material from the boss' computer, using the Bluetooth wireless LAN, so they can follow the seminar properly. Then they are putting on their headsets. The boss starts talking and everybody hear him clearly.
After a while the boss wants one of the employees, I e the economic advisor, to demonstrate the ratings in the company. Of course, the economist has all the ratings in a power point file or similar. So, he doesn't have to make things difficult for himself. His laptop is already indirectly connected to the overhead projector. If he wants, he can send the power point file to the others, before running it and projecting it to the screen. His headset is already connected with the others, so the minute he starts talking, everyone can hear him.
To sum up, the Bluetooth technology makes the meeting run smoothly. The participants can attend in an active way and no complications with connecting wires needed. Smoothly and simple.
Today, we have several usage models for Bluetooth, including 'interactive conference' and 'the ultimate headset', which we can use when we initialize the wireless LAN for the conference room. Considering the ultimate headset, there could be two different ways of doing this. Either you use the computer LAN for transferring the voice data, and then each headset is a slave to each computer or you create a LAN, consisting of just the headsets, where one or more headsets are masters and the others are slaves. I think the best way to do it, in this case, is to create one LAN, for audio exclusively.
But we also need a usage model for the overhead projector. In practice, the projector is always a slave, like a monitor or a printer. So for convenience, a usage model which includes these three devices would be to prefer. In that case the user could connect any of these three components to his computer.
The third usage model for this scenario is
for the Internet access point. Today we have models for
The security aspects of this conference are of course important to consider. Since Bluetooth is within a short range it's unlikely that unauthorized people can listen to the traffic. Furthermore, conferences are most likely within a room's limit, where no intruder can get. But, not to forget, Bluetooth's 2.4 GHz radio waves penetrate walls. When creating this wireless conference room one have to discuss what level of security is needed.
|
