Re: [Openbts-discuss] How to use of osmo-trx and OpenBTS run two independent BTS in dual channels mode of the single USRP B210 ?

[Tom T. <to...@ts...>]

On Sun, Jul 31, 2016 at 6:42 PM,  <lic...@si...> wrote:
>     To run two independent  OPENBTS In the single USRP-B210 ,use
> achemeris/2sector branch of OsmoTRX and  install two OPENBTS on a
> IPC（Industrial Personal Computer）. OsmoTRX  set channel to dual channel.The
> difference between the two OPENBTS is in OPENBTS.db,they have different C0
> and  TRX.Port. Modify FPGA program file, at the beginning of  the
> b200_coe.v increased

I'm not familiar with the achemeris/2sector branch or any FPGA
modifications of the B210. You should not, however, need to use a
separate branch or custom FPGA image for two channel operation.

The following command line will setup the B210 for 2 channel operation
with OpenBTS.

  $ osmo-trx -c 2 -f

Note that the B210 uses a shared local oscillator for both RF
channels, so there is a restriction of on ARFCN channel separation of
roughly 25 MHz.

TSC values for both TRX instances must match.

Each osmo-trx channel has its own set of socket interfaces based on
the pre-existing OpenBTS multi-channel port convention. I assume that
convention has not changed with recent versions of OpenBTS. The same
port convention is used by the Osmocom multi-TRX stack.

OpenBTS base port number:
  Channel 0 - 5700
  Channel 1 - 5702

  -TT