GE MDS Mercury Series, Reference Manual, Page: 72 / 196

64 Mercury Reference Manual 05-4446A01, Rev. C
hand-off parameters for Remote transceivers and explains how they
operate under different signal conditions.
NOTE:
In Table 3-2 on Page 64 , modes using the “Closest 3 APs” first
attempt to connect to the closest AP. If after the maximum
number of scanning seconds (
Max. Scanning Seconds
) a link is
not established, then the next closest AP is chosen. If after
another maximum number of scanning seconds a link is not
established, then the third closest AP is chosen. If a link still is
not established, the Remote again chooses the closest AP and
continues this cycle until it is associated to one of the APs.
NOTE:
In Table 3-2 on Page 64 , modes which use the
RSSI
and
SNR
Thresholds
use them in an “or” logic fashion. That is, if the
RSSI is below the set threshold OR the SNR is below
threshold, the Remote drops the current AP.
Table 3-2. Remote Hand-Off Parameters
Strict
Distance Strict
Connection Strict
Signal Signal and
Distance Signal, Dis-
tance, and
Bearing
Description The Remote
always chooses
the closest AP
regardless of
connection
status, RSSI,
etc. The Remote will
only choose a
new AP when
the modem link
is lost. The Remote
chooses a new
AP when the
modem link is
lost or when the
RSSI or SNR
falls below the
threshold. The
Remote then
chooses the
closest AP. Operates the
same way as the
Strict SIgnal
method except
that the current
AP is abandoned
only if the next
AP is within the
distance
threshold. Operates the
same way as the
Signal and
Distance method
except that the
current AP is
abandoned only
if the bearing is
away from the
current AP.
AP(s) Used
(see note be-
low
Table 3-2 )
Only closest. Closest 3 APs. Closest 3 APs. Closest 3 APs;
AP must be
within Distance
Threshold. Closest 3 APs;
AP must be
within Distance
Threshold.
Max. Scanning
Seconds N/A Applicable Applicable Applicable Applicable
RSSI
Threshold N/A N/A Applicable Applicable Applicable
SNR Threshold N/A N/A Applicable Applicable Applicable
Distance
Threshold N/A N/A N/A Applicable Applicable
Blacklist Time N/A Applicable Applicable Applicable Applicable