sends a data rate request to the base station or Access Node (AN). The AN receives requests
from a variety of ATs, and decisions have to be made regarding which ATs are to be served next.
The AN endeavours to achieve the best data transfer, and this is done by serving those ATs offering
a good signal-to-noise ratio. This is achieved at the expense of users experiencing poor propagation
conditions, which will typically be those at some distance from the AN’s antenna.
As with 1X, accurate time synchronization is required between the EV-DO access nodes. To achieve
this, time information is taken from the Global Positioning System, as this is able to provide an
exceedingly accurate time signal.
Forward link channels
A number of channels are transmitted ...