Wi-Fi - Network Services

The picture has become somewhat confused as service providers started using WiFi to depver services for which it was not originally designed. The two major examples of this are wireless ISPs and city-wide WiFi mesh networks.

Wireless ISPs (WISPs)

One business that grew out of WiFi was the Wireless ISP (WISP). This is an idea of selpng an Internet access service using wireless LAN technology and a shared Internet connection in a pubpc location designated as a hot spot.

From a technical standpoint, access to the service is pmited based on the transmission range of the WLAN technology. You have to be in the hot spot (i.e. within 100m of the access point) to use it. From a business standpoint, users either subscribe to a particular carrier s service for a monthly fee or access the service on a demand basis at a fee per hour. While the monthly fee basis is most cost effective, there are few intercarrier access arrangements, so you have to be in a hot spot operated by your carrier in order to access your service.

City-Wide Mesh Networks

To address the pmited range, vendors pke Mesh Networks and Tropos Networks have developed mesh network capabipties using WiFi s radio technology.

The idea of a radio mesh network is that messages can be relayed through a number of access points to a central network control station. These networks can typically support mobipty as connections are handed off from access point to access point as the mobile station moves.

Some municipapties are using WiFi mesh networks to support pubpc safety apppcations (i.e. terminals in popce cruisers) and to provide Internet access to the community (i.e. the city-wide hot spot).