WLAN (wireless local area network) enables stationary wireless communication. Technology is based on IEEE 802.11b, IEEE 802.11a, IEEE 802.11g standard and its versions, operating at 2.4 GHz or 5 GHz frequency, intended for public usage. These frequencies enable gross speed of up to 54 Mb/s.

Mobile telecommunications’ operators and internet providers (e.g. Swisscom, T-mobile, AOL, T-Online) represent the majority of WLAN network providers. Mobile telecommunications’ operators build upon compatibility between present data transfer technologies (e.g. GPRS), WLAN and the 3rd generation of mobile telecommunications. On the other hand, internet providers wish to enable users a wide-range access to the internet and its services outside their homes and offices as well.