Bandwidth requirements factor into the coverage mappings, since the distance
from an access point effects the available bandwidth. The example in Figure
provides for
seamless roaming, but not at a constant speed. This example takes advantage of
multi-rate technology, to step down in bandwidth and gain greater coverage
distances, with a single access point.
If 11 Mbps is required
everywhere, the access points would need to be relocated, so that only the
11-Mbps circles are touching each other, with some overlap. This would require
a greater number of APs, but consistent bandwidth would be achieved
.