144CHAPTER 6: USING RF PLANNING
34In the Wiring Closet list, select the wiring closet that contains the WX switch or switches to be connected to the shared MAPs.
If the MAPs will be directly connected to WX switches, a wiring closet is required. If all the MAPs in the coverage area will be indirectly connected to WX switches through the network, a wiring closet is not required.
35In the Redundant Wiring Closet list, select the wiring closet that will provide redundant connection to the MAPs. This is required for directly connected MAPs, if you require the MAPs to have redundant connections. Otherwise, this is not required.
36Click Finish to complete the wizard and create the coverage area. The coverage area is now displayed on your floor.
Compute and Place When you perform the Compute and Place procedure for one or more MAPs coverage areas, 3WXM automatically calculates the number of MAPs you
require and places them in appropriate locations on the floor. To do this, two calculations are performed in 3WXM. One is based on capacity (traffic engineering) and the other is based on pure RF coverage (at a given data rate).
After the calculations are performed, the number of MAPs from capacity and the number of MAPs from coverage are compared, and the bigger count “wins.” If capacity wins, a grid pattern of MAPs is established. The MAP coverage positions are reused, with the excess MAPs remaining in their original grid position.
Using a “clean” RF model is imperative for best results. If you have many parallel RF obstacles that are close together, the placement algorithm tends to add more MAPs than are required. So, even with the automatic clean layout mechanism in 3WXM, complex drawings demand additional pruning and isolation of single RF obstacles objects to keep the RF obstacle count as low as possible. For more information about cleaning your floor plans, see “Clean Layout” on page 130.
When you are performing Compute and Place for a coverage area for the first time, the results do not account for existing MAPs. Manual overrides of the MAP results are not taken into account if you perform Compute and Place again.
