User manual

Chapter 2 - Managing a Single Device/Cell Air Interface General Page
AlvariCRAFT Device Manager 39 User Manual
used for manually configuring the Max Link distance. In automatic mode, the BU
uses a special algorithm to estimate its distance from the RB.
The Link Distance parameters includes the following:
2.3.4 ESSID Parameters
The ESSID (Extended Service Set ID) is a string used to identify a wireless network
and to prevent the unintentional merging of two wireless networks or two sectors
in the same network. Typically, a different ESSID is defined for each AU/BU. To
facilitate easy addition of an SU/RB to an existing network without a prior
knowledge of which specific AU/BU will serve it, and to support the Best AU/Best
BU feature, a secondary “global” ESSID, namely “Operator ESSID”, can be
configured in the AU/BU. If the Operator ESSID Option is enabled at the AU/BU,
the Beacon frames transmitted by it will include both the ESSID and Operator
ESSID. The SU/RB shall regard such frames if either the ESSID or the Operator
ESSID matches it own ESSID. The ESSID of the AU/BU with which the SU/RB is
eventually associated is defined as the Run-Time ESSID of the SU/RB. Typically,
the initial ESSID of the SU/RB is configured to the value of the Operator ESSID.
Link Distance Option Applicable only for BU. The Link Distance Option defines whether the
distance between the BU and the RB will be determined manually
(using the Max Link Distance parameter) or automatically.
The Options are Automatic or Manual.
Fairness Factor (%) Applicable only for BU. The Fairness Factor defines the effect of the
Link Distance (calculated or configured manually) on the slot size. In
good quality links, the minimal slot size (9 microseconds) can be
used, providing maximum throughput. In a link with poor conditions
(such as a high interference level), the slot size should be increased
to enable better performance. The higher the Fairness Factor, the
higher is the impact of the Link Distance on the actual slot size.
The range is from 0 to 100 (%). A value of 100 (%) means maximum
impact of the distance on the slot size.
Measured Max Link
Distance (Km)
A read-only display of the measured distance between the BU and
the RB.
Max Link Distance (Km) Applicable only for BU. The Max Link Distance parameter allows
configuring the estimated distance between the two units when the
Link Distance Option is set to Manual.
The range is from 0 to 54 (Km). The value of 0 has a special meaning
of No Compensation: Acknowledge Time Out is set to a value
representing the maximum distance of 54 km. The time slot size is set
to its minimal value of 9 microseconds.