User Manual

Appendix
BreezeNET PRO.11 Series 9-12 User’s Guide
Roaming
When any area in the building is within reception range of more than one
Access Point, the cells’ coverage is said to overlap. Each wireless station
automatically establishes the best possible connection with one of the
Access Points. Overlapping coverage areas are an important attribute of the
wireless LAN setup, because this enables seamless roaming between
overlapping cells.
Figure 9.4: Roaming Through Overlapping Cells
Roaming allows mobile users with portable stations to move freely between
overlapping cells, constantly maintaining their network connection.
Roaming is seamless: a work session can be maintained while moving from
one cell to another. Multiple Access Points can provide wireless coverage
for an entire building or campus. When the coverage area of two or more
APs overlap, the stations in the overlapping area can establish the best
possible connection with one of the APs, continuously searching for the best
AP. In order to minimize packet loss during switchover, the “old” and
“new” APs communicate to coordinate the process.
Load Balancing
Congested areas with many users and heavy traffic load per unit may require
a multi-cell structure. In a multi-cell structure, several co-located APs
“illuminate” the same area creating a common coverage area which
increases aggregate throughput. Stations inside the common coverage area
automatically associate with the AP that is less loaded and provides the best
signal quality. The stations are equally divided between the APs in order to