ZyXEL Communications HES-309M, Руководство пользователя, Страница: 56 / 246

Chapter 6 WiMAX
HES-309M Series User’s Guide
56
CINR & RSSI
Refresh
Interval Set the refresh interval in milliseconds for calculating the signal-to-
noise measurement (CINR) and signal strength measurement (RSSI) of
the WiMAX Device.
LDRP (Low
Data Rate
Protection) Enter the Low Data Rate Protection (LDRP) time in milliseconds. If the
uplink/downlink data rate is smaller than the LDRP time, the WiMAX
Device sends a disconnect request to the base station.
LDRP TX
Rate Enter the outgoing data rates for LDRP in bytes per second.
LDRP RX
Rate Enter the incoming data rates for LDRP in bytes per second.
Connection Type Settings
Mode Select Select how the WiMAX Device connects to the base station.
• Auto Connect Mode - The device connects automatically to the
first base station in range.
• Network Search Mode - The device scans for available base
stations then connects to the best one it can.
BSID This displays the MAC address of a base station within range of the
WiMAX Device.
Preamble ID The preamble ID is the index identifier in the header of the base
station’s broadcast messages. In the beginning of a mobile stations’s
network entry process, it searches for the preamble and uses it to
additional channel information.
The preamble ID is used to synchronize the upstream and downstream
transmission timing with the base station.
Frequency
(MHz) This field displays the radio frequency of the WiMAX Device’s connection
to the base station.
Bandwidth
(MHz) This field displays the bandwidth of the base station in megahertz
(MHz).
RSSI (dBm) This field displays the Received Signal Strength Indication (RSSI),
which is an overal measurement of radio signal strength. A higher RSSI
level indicates a stronger signal.
CINR (dB)
R3/R1 This field displays the average Carrier to Interference plus Noise Ratio
for the current connection. This value is an indication of overal radio
signal quality, where a higher value means a better quality signal.
Search Click this to have the WiMAX Device scan for base stations.
Table 10 Connection Settings (continued)
LABEL DESCRIPTION