Naturally one would like to remove all these wires and to connect these devices by radio, just as one had been freed from the wire connection to the telephone network, in cities, with the cellular networks like GSM, or at home with for example DECT handsets. Of course there certain requisites for this kind of radio interface:
This interface must be standardised : objects coming from different manufacturers must be able to communicate; the number of potential candidates (IEEE 802.11b, HomeRF, Bluetooth) indicates that one is not yet at this stage.
It should not be expensive: Bluetooth would have a certain advantage on 802.11b in this respect.
It must allow a high data rate; in this respect 802.11b outperforms Bluetooth.
If designed for short ranges (a few tens of meters ) it must consume little energy: if each object thus modified requires to be plugged into an outlet in order to work one will not have saved much cabling; they must thus work if possible using batteries, and must not be very greedy (batteries end up being costly!).
Finally, the management of all these objects and the routing of information in this network should not require the competence of a network engineer! It would be nice if the network reconfigures itself every time an object is introduced into the environment. This last aspect of the problem is the object of this contribution.