Honeywell OW-CDX050, Руководство пользователя

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Wireless Mesh Configuration
Wireless Mesh screens
74 OneWireless Multinode User's Guide R110
6/08
Auto Mesh
Parameter
Option Description
priority to a value lower than all wireless multinodes in the mesh network. The lowest
value (highest mesh priority) in the network becomes the STP root. See also
Tuning
the mesh priority .
RSSI window size 1 - 100 Sets the number of samples over which the
reported RSSI value is calculated. A
smaller number means that the RSSI value
changes more quickly and is affected more
by outliner values. A larger value means
that the RSSI value is not affected by
transient changes in RSSI value. This
parameter serves to smooth RSSI value.
RF signals fluctuate over time and in different operating environments and the rate of
fluctuation can vary. The RSSI value in which multinode applications use is an
average of the last window size samples. The sample rate is dependent upon the
beacon interval of the associated node. His parameter also servers to stabilize the
wireless network.
For fixed location deployment, higher values are recommended for both window-size
and beacon interval. Lower values are recommended when adjusting antennas or
distributing mobile mesh devices.
Signal Strength
Threshold 75%, 60%,
51%, 45%,
39%, 27%,
21%, 15%, 9%,
None Sets the threshold of signal strength that
prevents the node from associating and
joining the network.
When creating a mesh link, if the signal strength is less that the threshold, the link is
not be created. Although once a link is created, it will not be broken even if the signal
goes below the threshold. This parameter helps to stabilize the network.
Link Sensitivity 75%, 60%,
51%, 45%,
39%, 27%,
21%, 15%, 9%,
None The amount of change in the RSSI value
required before the multinode changes its
mesh link. Set this value high for good
mesh stability. It is recommended that all
nodes in a network are set to the same
value.
Once a link is created, signal strength is mapped to rapid spanning tree priority
(RSTP) path cost. Since RF signals fluctuate, path cost needs to be adjusted
accordingly. However, adjusting path cost too frequently causes network instablility.
Path cost is adjusted if the signal strength increases/decreases by link sensitivity
value since the last adjustment. If the value is set to none, evey link acts like 100%
signal and no path cost adjustment is made.