Possible RAN Configurations
RAN Configuration constraints
The AMARI Callbox Classic RAN configuration is subject to constraints stemming from:
1- The characteristics and the number of Software Defined Radios (SDRs) it incorporates.
2- The CPU power, thereby ultimately being restricted by the terms of the software license.
1- Constraints Arising from SDRs:
The Callbox integrates three SDRs, with each SDR capable of supporting Single-Input Single-Output (SISO) or 2x2 Multiple-Input Multiple-Output (MIMO) configurations with a maximum bandwidth of 56 MHz. Users have the flexibility to assign each SDR to a specific frequency, thereby configuring either a SISO or 2x2 channel. Additionally, two SDRs can be aggregated to enable 4x4 MIMO functionality. It's worth noting that as an experimental feature, albeit with a performance trade-off, two SDRs can be combined to provide a 100MHz channel. However, for optimal performance in a 100MHz channel, it's recommended to opt for the AMARI Callbox Advanced, Ultimate, or Extreme, which are equipped with 100MHz SDRs. This provides users with the follwing combinations:
Three 56 MHz 2x2 channels
One 100 MHz 2x2 channel combined with one 56 MHz 2x2 channel
One 56 MHz 4x4 channel combined with one 56 MHz 2x2 channel
Each channel can support multiple contiguous cells, provided that the total bandwidth and MIMO layers of the channel are not exceeded.
2- Constraints Arising from CPU and Software License:
The limitations imposed by the software license restricts the total bandwidth of cells multiplied by the number of MIMO layers to 120MHz.
