Specifications

RF Design 37
Chapter 4
Radio Type
Specify the radio type(s) of your APs using the pull-down Radio Type menu on
the Modeling Parameters page.
Available Radio Type Choices:
Overlap Factor
The Overlap Factor is the amount of signal area overlap that you want when
the APs are operating. Overlap is important if an AP fails. It allows the
network to self-heal with adjacent APs powering up to assume some of the
load from the failed device. Although there may be no holes in coverage in this
scenario, there will likely be a loss of throughput. Increasing the overlap will
allow for higher throughputs when an AP has failed and will allow for future
capacity as the number of users increases.
The valid range of values for the overlap factor are from 100% to 1000%.
Users
NOTE—The Users text boxes are active only when the Capacity model is selected.
Enter the number of users you expect to have on your Wireless LAN in the
Users text box. Enter the number of users per access point you expect in the
Users/AP text box.
The numbers entered in the these two text boxes must be no-zero integers
between 1-255 inclusive.
Rates
NOTE—The Rate pull-down menus are active only when the Coverage or Capacity
design models are selected.
Select the desired data rates from the pull-down menus for 802.11b/g and
802.11a.
High data transmission rates will require an increased number of AP to be
placed in your building. You should carefully evaluate your user’s data rate
needs.
z 801.11a 5GHz, Orthogonal Frequency Division Multiplexing
(OFDM) with data rates up to 54Mbps.
z 802.11b 2.4GHz, Direct Spread Spectrum (DSSS) multiplexing
with data rates up to 11Mbps.
z 802.11g 2.4GHZ, OFDM/CCK (Complementary Code Keying)
with data rates up to 54Mbps.