WPS
Introduction of WPS
Although home Wi-Fi networks have become more and more popular, users still
have trouble with the initial set up of network. This obstacle forces users to use the
open security and increases the risk of eavesdropping. Therefore, WPS is designed
to ease set up of security-enabled Wi-Fi networks and subsequently network man-
agement (Wi-Fi Protected Setup Specication 1.0h.pdf, p. 8).
The largest difference between WPS-enabled devices and legacy devices is that
users do not need the knowledge about SSID, channel and security settings, but they
could still surf in a security-enabled Wi-Fi network. For examples, in the initial net-
work set up, if users want to use the PIN conguration, the only thing they need to do
is entering the device PIN into registrar, starting the PIN method on that device and
simply wait until the device joins the network. After the PIN method is started on both
sides, a registration protocol will be initiated between the registrar and the enrollee.
Typically, a registrar could be an access point or other device that is capable of man-
aging the network. An enrollee could be an access point or a station that will join the
network. After the registration protocol has been done, the enrollee will receive SSID
and security settings from the registrar and then join the network. In other words; if a
station attempts to join a network managed by an access point with built-in internal
registrar, users will need to enter station’s PIN into the web page of that access point.
If the device PIN is correct and valid and users start PIN on station, the access point
and the station will automatically exchange the encrypted information of the network
settings under the management of AP’s internal registrar. The station then uses this
information to perform authentication algorithm, join the secure network, and transmit
data with the encryption algorithm. More details will be demonstrated in the following
sections.
Supported WPS features
Currently, Wireless Gateway supports WPS features for AP mode, AP+WDS
mode, Infrastructure-Client mode, and the wireless root interface of Universal
Repeater mode.
Other modes such as WDS mode, Infrastructure-Adhoc mode, and the wire-
less virtual interface of Universal Repeater mode are not implemented with WPS
features.
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