Commissioning

In order to initially setup an operational point-to-point link using InfiLINK XG units, you must run the procedure described below.

Step 1 - Perform site survey

• Determine line of sight conditions and obstacles along the path
• Perform spectrum analysis and figure out spectrum occupation and available channels
• Use InfiNet Wireless link planner tool, InfiPLANNER: https://infiplanner.infinetwireless.com, to estimate link performance and required configuration in terms of antennas, channel width, Tx power, etc.

Step 2 - Pre-configure the units in the lab

The equipment list required for lab configuration and on site installation is:

Component Description 2 x InfiLINK XG unit (ODU) Available in InfiLINK XG BOM   2 x mounting kit Available in InfiLINK XG BOM   2 x indoor power supply (IDU) Available in InfiLINK XG BOM   2 x power supply cord Available in InfiLINK XG BOM   1 x laptop Not available in InfiLINK XG BOM 3 x Ethernet patch cords Not available in InfiLINK XG BOM

In the lab and later on site perform the connections as indicated below:

• Connect the power cord between the GE0 port of the XG unit and the splitter port of the PoE injector
• Connect the Ethernet patch cord between the Laptop and the switch port of the PoE injector
• Connect the PoE injector to an AC power supply using the power cord.

After the physical connections are completed, access each unit to the default IP-address 10.10.10.1 with mask 255.255.255.0 via web browser. Make sure that the Ethernet port of the Laptop has an IP-address assigned from the same network class as the one for the InfiLINK XG unit (for example, set 10.10.10.50 with mask 255.255.255.0).

Use any letters or numbers for initial authentication, for example:

• User name: "login"
• Password: "password"

Upgrade the units to the newest firmware available in order to benefit of the latest features implemented. You can directly upgrade to the latest firmware available as described in section "Firmware".

Another option is to download the firmware from the ftp address ftp://ftp.infinet.ru/pub/Firmware/XG/H12 and then the upgrade can be performed via Web interface as described in section "Upload".

The last step is to connect to each unit separately and configure the radio link parameters according to the planning previously performed. Initially the status of the radio link is down like below.

In the Web interface, go to the Radio page and perform the following configuration:

• Set one unit as Master and another one as Slave
• Set the center frequency which should match on both units
• Set the same channel width on both units from the range: 10, 20 or 40 MHz
• Set the air frame period to match on both units (2, 4, 5 or 10 ms); shorter air frame translates into lower latency and longer air frame means higher throughput
• Set the link ID between 0 and 15 to match at both ends of the links
• Set the maximum distance in kilometers from 1 to 100 (initial setting is recommended to exceed more the actual distance)
• Set the transmit power for each unit between 0 and 27 dBm

#Peer exported config:
xg -v3-start
xg -v3 a01b833402f59907abdcb812d5de20fd.Ko7ClHTRVps/8oyNjnucBcSqUlcCJbOae9Kf4OZ
xg -v3 zRU7tYm1REMTUyHWYTaGGuuooDp2DWkcxyFGLmEb5yx45wFImL5Nx72XK6bnl9AzRdZjWVSN
xg -v3 xCrliSUfn7JZazn1yTEKE90fKLIK/HKNJXYN7vg4lEocgBWguYdFc/u8fEwENtJYBSKNGbu3
xg -v3 HQ0HvIdTqAwOz5vXM89CkhL5ZZmDuYN3FFSo6wV+h//zBuSfuJ5QVb6fv2Do6tPIE4kuZSsB
xg -v3 UXLavUriPtSlRxzIYUO7+9XSMggomrf7NZtM37PxQkUYIZ116K3++w5HPVXXq8Po7xVmotnq
xg -v3 px1uDbYtSjs2O9yx6h6Z0HGp8GLAEY7Ka5ZRoyAvyfA73pobYrEhzZ+hdwWnDDJYM3DmAhuW
xg -v3 yAUgtVHJ4hC9u6BP5IAlQXsm5QSbuRwihWdmrwiThwSGmXiZWCXOmxzg1IA==
xg -v3-end

Save the configuration, reboot both units and check if they link up after reboot.

The link status should be “UP” and the radio statistics should indicate the capabilities and quality of the link.

Step 3 - Perform initial alignment on site

• Install both units on the masts and roughly direct them at each other (the detailed installation steps can be checked at section Installing the Outdoor Units during InfiLINK XG Installation of this document)
• Turn them on and check that the wireless link will be established using RF link led indicator
• Perform coarse alignment using built-in signal strength indicators
• Perform fine alignment using the "Alignment tool" available in the Web interface or "xginfo stat" output in the CLI. Try to  maximize CINR and RSSI readings. Please follow the detailed indications from section Antenna alignment for a proper antenna alignment.
  
  

Step 4 - Optimize the link performance

• Adjust maximal link distance parameter based on the measured distance.

• Monitor air block error rate by checking the Acc TBER  parameter in the "Status" page or in "xginfo stat" output and adjust the AMC strategy if necessary.

• “normal” AMC strategy is enabled by default.
• “aggressive” AMC strategy has been designed to maximize the throughput by utilizing higher-order modulation schemes and reducing SNR margins.
• “conservative” AMC strategy increases SNR margins, so that lower order MCSs are used in order to keep error rates to the minimum.

It is recommended to use “normal” strategy initially and adjust it based on target and actual TBER values.

• Fine tune the "Tx power" in order to optimize the CINR and RSSI values. These parameters can be monitored in real time from the "Status" page and the recommendation is to keep the RSSI between -40…-60 dBm and the CINR higher than 30 dB
• Select the most appropriate air frame period