User's Manual

InfiNet Wireless R5000 Technical User Manual

downstream. In order to maintain energetic parameters, we have to increase

base station output power by 9 dB by means of built-in amplifier (for example to

use 300-500mW devices).

4. «Bad subscriber» problem

While working in Point-to-Multipoint topology wireless network could face a

problem when one of the subscriber devices has much poorer connection

characteristics to Base Station than the other ones. Such subscriber device is

using a considerable part of Base Station’s resources. While Base Station is trying

to send him a packet on a low bitrate other subscribers are waiting for this

transaction to finish. Therefore, all the networks’ performance will be reduced.

To lower the influence of such “bad subscriber” on the overall wireless network‘s

performance it is recommended to decrease a priority of this subscriber (using

“qm” command). In this case all the packets to “bad subscriber” will be sent

after other subscriber stations already get their portions of data. This will result

in wireless network performance optimization as subscriber devices’ operation

won’t depend on the bitrate of “bad subscriber”.

5. TDM transmission

InfiNet Wireless equipment allows E1/T1 flows transmission via the radio channel

in Point-to-Point topology. The System ensures transmission of 4 TDM channels

and 45 Mbps Ethernet data simultaneously. Moreover, IW devices with TDM

support allow Multi-hop TDM transmission when E1/T1 data are sent via several

wireless Point-to-Point hops.