FibeAir IP-20C/S/E
User Guide
Ceragon Proprietary and Confidential
Page 90 of 597
3.6.9
Disabling Unit Protection
You can disable unit protection at any time. If you disable unit protection,
keep in mind that while the unit that was formerly the active unit maintains its
IP address, the unit that was formerly the standby unit is assigned the default
IP address (192.168.1.1)
To disable protection:
1 Select Platform > Management > Unit Redundancy. The Unit
Redundancy (HSB Protection) page opens.
2 Select Disable in the Protection Admin field.
3 Click Apply.
3.7
Configuring MIMO and Space Diversity
Note:
This feature is only relevant for IP-20C units.
This section describes how to configure MIMO and space diversity, and
include the following topics:
MIMO and Space Diversity Overview
Creating a MIMO or Space Diversity Group
Enabling/Disabling a MIMO or Space Diversity Group
Setting the Role of a MIMO or Space Diversity Group
Deleting a MIMO or Space Diversity Group
3.7.1
MIMO and Space Diversity Overview
Line-of-Sight (LoS) Multiple Input Multiple Output (MIMO) achieves spatial
multiplexing by creating an artificial phase de-correlation by deliberate
antenna distance at each site in deterministic constant distance. At each site in
an LoS MIMO configuration, data to be transmitted over the radio link is split
into two bit streams (MIMO 2x2) or four bit streams (MIMO 4x4). These bit
streams are transmitted via two antennas. In MIMO 2x2, the antennas use a
single polarization. In MIMO 4x4, each antenna uses dual polarization. The
phase difference caused by the antenna separation enables the receiver to
distinguish between the streams.
IP-20C supports both MIMO 2x2 and MIMO 4x4. For a full explanation of
MIMO support in IP-20C, refer to the IP-20C Technical Description.
The same hardware configurations can also be used to implement BBS Space
Diversity. IP-20C supports 1+0 and 2+2 Space Diversity. For a full explanation
of Space Diversity support in IP-20C, refer to the IP-20C Technical Description.
Note:
Only one MIMO or Space Diversity group can be created per
IP-20C unit. All MRMC scripts that support MIMO also
support Space Diversity.