Infinet Wireless: Technical Documentation
Page tree
Skip to end of metadata
Go to start of metadata

You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 4 Next »

Figure - Radio

The radio page is divided in two sections:

  • "Radio settings" - allows you to configure  general  radio parameters and features:
    • General
    • Radio Frontend
    • AMC
    • Air Frame
  • "Frequency Channel Grids" - specifies the  default and custom  frequency domains for each  bandwidth (10, 20, 40 MHz).

Radio settings

The following radio parameters can be configured under the "Radio settings" section:

Radio parameterDescription
Node Type
  • Set the node type to Master or Slave
  • In the point-to-point link, one unit must be set to Master and the other one to Slave
Traffic Prioritization
  • Enable/disable prioritization strategy:
    • on
    • off
Link ID
  • Use this parameter to avoid connecting a unit to a wrong peer if there are several co-located units using the same center frequency
  • Specify different ID values for different link. Both ends of the same link must have the same ID. The value range is 0…15 in increments of 1
Downlink Center Frequency, MHz
  • Allows you to configure the frequency in MHz at which data will be transmitted
  • The frequency is automatically set to "Auto" in case of DFS option in license
Uplink Center Frequency, MHz
  • Allows you to configure the frequency in MHz at which data will be received
  • The frequency is automatically set to "Auto" in case of DFS option in license
Channel Width (MHz)
  • Allows you to configure the channel width (in MHz). The possible values are: 10, 20 or 40 MHz
Short Cyclic Prefix
  • Enable/disable short cyclic prefix option
  • Cyclic prefix is used to mitigate inter-symbol interference due to multipath propagation environment
  • Cyclic prefix size is always 1/8 for 10 MHz channel width
Transmit Power (dBm)
  • Allows you to configure the transmit power level (in dBm). The value range is 0…27 dBm in increments of 1 dBm
Control Block Boost
  • Enable/disable control block boost option
  • Control Block Boost improves link availability in the most difficult propagation and interference conditions due to the radio frame with control information transfer at duplicate transmit power
Maximal  MCS
  • Allows you to configure the maximum MCS that can be used:
    • QPSK 1/2
    • QPSK 3/4
    • QAM16 1/2
    • QAM16 3/4
    • QAM64 4/6
    • QAM64 5/6
    • QAM256 6/8
    • QAM256 7/8
    • QAM256 30/32
    • QAM1024 8/10
AMC Strategy
  • Allows you to select the AMC algorithm strategy:
    • “conservative” assumes using higher CINR thresholds in order to minimize the error rate
    • “aggressive” lowers the thresholds in order to use higher modulation levels and thus increase the throughput
    • “normal” represents a balance between the error rate and throughput values
TDD Synchronization
  • Allows you to configure the TDD synchronization source:
    • “freerun” unsynchronized frame start
    • “gnss” synchronization from built-in GPS/GLONASS receiver
Frame period (ms)
  • Allows you to set the air frame period duration (in ms). The value range is 2, 4, 5 or 10 ms
    • A shorter frame period gives lower latency, but also has higher overheads
    • Using longer frame periods cuts down overheads, but increases the latency

Downlink Quota (%)

  • Actual downlink/uplink ratio values through specifying the downlink subframe period relative to the whole frame
  • Downlink Quota available values depend from:
    • Channel width
    • Short Cyclic prefix
    • Frame period
    • Max Distance
Max Distance (km)
  • Allows you to specify the maximum link distance (in kilometers). The possible values: from 1 to 100 in increments of 1 km
  • The specified value must not be lower than the actual link distance, but it is recommended keep it as close as possible to the actual distance to avoid unnecessary overheads
  • The recommended strategy is to set this parameter well above the actual distance after the units have been deployed based on the measured distance value taken from “xginfo stat” output
Table - Radio settings

CAUTION

 Setting the source of synchronization takes effect only for the Master unit.

CAUTION

 Make sure that the built-in GNSS receiver is set up before enabling the “gnss” option (use “gps” command to check the status - it is recommended to use values of “HDOP” parameter up to 1.5 for reliable global timing synchronization)

CAUTION

 Please note that the following settings must be equal for the co-located units:

  • Center Frequency
  • Channel Width
  • Max Distance
  • Frame Period
  • Downlink Quota
  • Short Cyclic Prefix
  • Link ID

All co-located units must be Master units

Frequency Channel Grid

The licensed frequencies range per each bandwidth is displayed in the “Default Channel Grids” fields:

  • For 10 MHz bandwidth: value range between 6295...6405 MHz in increments of 10 MHz
  • For 20 MHz bandwidth: value range between 6300...6400 MHz in increments of 20 MHz
  • For 40 MHz bandwidth: value range between 6300...6400 MHz in increments of 20 MHz

Figure - Default Channel Grids

Changes to these default values can be performed in the “Customer Channel Grid” fields, where you can:

  • Limit the licensed frequencies range per each bandwidth
  • Change the center frequency step (for example, 6295-6405/2.5 means that the step between the center frequencies from 6295 MHz and 6405 MHz is 2.5 MHz):

Figure - Customer Channel Grid

The step must be >= 1 MHz and the frequencies range (determined by the license) cannot be exceeded.

  • No labels