WPAN
i. A wireless personal area network (WPAN) is a short-distance (typically 10 m but as far as 20 m) wireless network specially designed to support portable and mobile computing devices such as PCs, PDAs, printers, storage devices, cellphones, pagers, set-up boxes, and a variety of consumer electronic equipment.
ii. Many cell phones already have two radio interfaces, one for the cellular network and the other for PAN connections.
iii. WPANs such as Bluetooth provide enough bandwidth and convenience to
make data exchange practical for certain mobile devices requiring data exchangesat rates up to 1 Mbps.
iv. At the other end of the scale, UWB will provide the capability of streaming video signals at data rates up to 1 Gbps.
However, many control and command applications require much lower data rates and also the lowest possiblecost, thus ZigBee.
Example technologies for WPAN :
Bluetooth (IEEE 802.15.1), UWB (IEEE 802.15.3a), and ZigBee (IEEE 802.15.4) are examples of WPANs that allow devices within close proximity to join together in wireless networks in order to exchange information.
| - |
WLAN |
WPAN |
| Standard |
IEEE 802.11.x = b, g, a, n, ac |
IEEE 802.15.1, 802.15.3, 802.15.4 |
| Definition |
A wireless local area network (WLAN) is a wireless computer network that links two or more devices using a wireless distribution method within a limited area such as a home, school, computer laboratory, or office building. |
A (WPAN) wireless personal area network is a low range wireless network which covers an area of only a few dozens of meters |
| Layers |
PHY and MAC used with TCP/IP |
PHY and MAC used with Zigbee |
| Frequency Band |
2.4 GHz ISM (802.11b/g/n) 5 GHz (802.11a/n/ac) |
2.4 GHz ISM (also 868/900 MHz) |
| Power consumption |
(low power mode |
Low power |
| Peak current |
100-200 mA |
18 mA |
| Max. Tx-Power |
100-200 mA |
typ. 0 dBm |
| Range |
30m/300m in/outdoor |
20 m indoor |
| Modulation |
OFDM DSSS (802.11b) |
DSSS, O-QPSK |
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