User`s guide

Appendix
User’s Guide 9-14 BreezeNET PRO.11 Series
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
switch-over, the “old” and “new” APs communicate to coordinate the process.
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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 equally share the load between all APs.
Efficiency is maximized because all APs are working at the same low level load.
Load balancing is also known as load sharing.