Multicast Rate - Proxim ORINOCO AP-600B User Manual

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The distance between APs should not be approximated. It is calculated by means of a manual Site Survey, in
which an AP-600b is set up and clients are tested throughout the area to determine signal strength and
coverage, and local limits such as physical interference are investigated. From these measurements the
appropriate cell size and density is determined, and the optimum distance between APs is calculated to suit
your particular business requirements. Contact your reseller for information on how to conduct a Site Survey.

Multicast Rate

The multicast rate determines the rate at which broadcast and multicast packets are transmitted by the Access Point to
the wireless network. Stations that are closer to the Access Point can receive multicast packets at a faster data rate
than stations that are farther away from the AP. Therefore, you should set the Multicast Rate based on the size of the
Access Point's cell. For example, if the Access Point's cell is very small (e.g., Distance Between APs is set to
Microcell), you can expect that all stations should be able to successfully receive multicast packets at 11 MBits/sec so
you can set Multicast Rate to 11 Mbits/sec. However, if the Access Point's cell is large, you need to accommodate
stations that may not be able to receive multicast packets at the higher rates; in this case, you should set Multicast
Rate to 1 or 2 Mbits/sec.
1 Mbit/s
Figure 4-8 1 Mbits/s and 11 Mbits/s Multicast Rates
1 2 7 ( 1 2 7 ( 1 2 7 ( 1 2 7 (
There is an inter-dependent relationship between the Distance between APs and the Multicast Rate. In
general, larger systems operate at a lower average transmit rate. The variation between Multicast Rate and
Distance Between APs is presented in the following table:
1.0 Mbit/s
Large
Medium
Small
Minicell
Microcell
The Distance Between APs must be set before the Multicast Rate, because when you select the Distance
Between APs, the appropriate range of Multicast values automatically populates the drop-down menu. This
feature is not available if you are using an ORiNOCO 802.11a/b ComboCard or a non-ORiNOCO client with
the AP-600b.
2.0 Mbits/s 5.5 Mbits/s
yes yes
yes yes yes
yes yes yes
yes yes yes
yes yes yes
Advanced Configuration
11 Mbits/s
11 Mbits/s
yes
yes
yes
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