User Manual

Planning and Installing Wireless LANs
BreezeNET PRO.11 Series 5-8 User’s Guide
5.1.3. Multicell Configuration
Areas congested by many users and a heavy traffic load may require a
multicell structure. In a multicell structure, several Access Points are
installed in the same location. Each Access Point has the same coverage
area, thereby creating a common coverage area that increases aggregate
throughput. Any workstation in the overlapping area can associate and
communicate with any Access Point covering that area.
⇒⇒ To set up a BreezeNET multicell:
1. Calculate the number of Access Points needed as follows: Multiply
the number of active users by the required throughput per user, and
divide the result by 1.5Mbps (net throughput supported by
collocated Access Points). Consider the example of 5 active
stations, each requiring 0.5 Mbps throughput. The calculation is
(5*.5)/1.5=1.6. Two Access Points should be used. This method is
accurate only for the first few Access Points.
The aggregate throughput of the common coverage area is equal to
the number of co-located Access Points multiplied by the
throughput of each individual Access Point, minus a certain amount
of degradation caused by the interference among the different
Access Points.
2. Install several Access Points in the same location a few meters
from each other so they cover the same area. Be sure to position the
Access Points as high as possible.
3. To allow roaming and redundancy, configure all Access Points and
stations adapters to the same ESSID.
4. To improve collocation and performance, configure all Access
Points to different hopping sequences of the same hopping set.
5. Install Station Adapters or SA-PCR Cards on workstations.
6. Make sure that the Load Sharing option is activated. Stations will
automatically associate with an Access Point that is less loaded and
provides better signal quality.