Information Technology Reference
Table 1: Wireless technologies main features.
Table 2: Wireless technologies comparison.
> 50 m
> 50 m
< 10 m
< 2 m
10 µA to
Table 2 is the summary of described wireless technologies. It shows the
maximum bit rate, the relative cost of devices, the supported protocols for
integration with data and/or voice networks, the operational range and the
approximate power consumption.
At the end of this chapter, we decided to spend a paragraph for radio
frequency identification (RFID), even if it is a wireless technology not
intended for communications. Owing to its features, RFID became one of the
most used wireless technology in pervasive systems implementations. In fact,
due to its flexibility, it can be used in several different ways than those it was
RFID technology is a contactless identification that can read labels which
hold data. RFID was initially developed for items detection and access
control applications. It is particularly effective in industrial production and,
more generally, in environments where bar-coded labels are difficult to read.
RFID can detect moving objects, so it is widely used in the transport
management field, for the automatic identification of vehicles and cargo.