User's Manual

Table Of Contents
InfiNet Wireless R5000 Technical User Manual
Copyright © 2004-2006 by InfiNet Wireless Limited.
31
7/6 signal level from the subscriber/signal level from the BS.
Measured according to the relative InfiNet scale from 0 to 16 (0 min,
16 max)
IP IP-address for the radio interface from the BS side
Links number of testing packets sent
Reps number of testing packets acknowledgments received
Rx data rate on receiving in Mbit/sec
Tx data rate on transmitting in Mbit/sec
Burst Burst mode is turned on
Bitrate control
Traditional ways of InfiNet router's usage imply a fixed connection speed
between a base station and a subscriber. A subscriber while searching and
registering on a base station chooses an optimal mode which is available in the
configuration and afterwards does not change connection parameters even if
radio channel characteristics (signal levels, noise level) are changing. The speed
in both directions is set as it is configured on the subscriber's side. If the
conditions worsen so much that further work is impossible the connection breaks
and a new base station search runs or new work parameters are being chosen.
This way of configuration is logical when one needs to get a reliable channel with
previously known characteristics and when all radio channel parameters are
thoroughly designed.
However in some cases when there is a need in fast channel making (if it has
non-critical parameters) it is more convenient to switch to an automatic mode.
The automatic speed control mode solves this problem. In this mode every
device controls the connection parameters independently (amplitude of the
received signal, SNR on the opposite side etc) and chooses such transmitting
speed which provides necessary conditions for a reliable work with minimum
number of ARQs and losses. Speed values can be different for each direction but
it will be optimal.
If this mode is turned on at the subscriber's side the base station will turn it on
also for this particular subscriber. In this case the base station search is
performed on the minimal for the subscriber speed and then the speed is
increased to its maximum value (it can be limited by the speed specified in rma
bs command or by limitations for the specific device model). If autobitrate mode
is turned on at the base station all subscriber devices that work with it will
automatically switch to this mode.
The speed ranges for the autobitrate algorithm are specified in CPE
configuration by specifying speed and minspeed parameters.
In order to turn this mode on (either on BS or CPE), type:
rma <IF-NAME> autobitrate
In order to turn this mode off (either on BS or CPE), type:
rma <IF-NAME> -autobitrate
Roaming
Roaming means that for each CPE several base stations with which it can
potentially interact can be specified. If there are several BS configured for the
CPE, it will measure signal quality level with each of those BS and choose the BS
with the best integral characteristic. In order for the CPE to have a roaming
feature one should: