Chapter 7 The WAN Configuration Screens
User’s Guide
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Figure 28 WiMax: Mobile Station
WiMAX technology uses radio signals (around 2 to 10 GHz) to connect subscriber stations
and mobile stations to local base stations. Numerous subscriber stations and mobile stations
connect to the network through a single base station (BS), as in the following figure.
Figure 29 WiMAX: Multiple Mobile Stations
A base station's coverage area can extend over many hundreds of meters, even under poor
conditions. A base station provides network access to subscriber stations and mobile stations,
and communicates with other base stations.
The radio frequency and bandwidth of the link between the WiMAX Modem and the base
station are controlled by the base station. The WiMAX Modem follows the base station’s
configuration.
Authentication
When authenticating a user, the base station uses a third-party RADIUS or Diameter server
known as an AAA (Authentication, Authorization and Accounting) server to authenticate the
mobile or subscriber stations.
The following figure shows a base station using an AAA server to authenticate mobile station
MS, allowing it to access the Internet.
Figure 30 Using an AAA Server
