multiple cells in one gnb

[Zplusless]

Hi srsRAN community,
Could you please guide me on how to modify the gNB configuration so that a single DU can support multiple cells (both configs for working with ZMQ and USRP-b210)?

Any guidance is appreciated! Thanks in advance!

[rakeshreddy7397]

Hi Zplusless,

Any luck in getting multiple cells to run in a single srsDU? please share your insights if any

[Zplusless]

@pgawlowicz What great news! Thanks for your reply.

Here we have two questions:

1. could we use a different dl_arfcn in cell 2?
2. How are the tx and rx ports mapped to the cells? port 0 for cell 1 and port 1 for cell 2?

Thanks in advance!

[pgawlowicz]

1. It should be possible if RU supports it.
2. Yes, it should be like you say.

[rakeshreddy7397]

@pgawlowicz

For the config (ZMQ) attached in the above replies, I see 2 DU's being created and F1 setup happening twice. Two cells within a single DU isn't happening. Please see gnb log file attached below.

gnb_zmq.log

After a fix is identified, can you please provide a config for the same scenario for USRP X310 over 10 GbE connection?

Thanks in advance

[pgawlowicz]

Do you use the newest version of the srsgnb?

[rakeshreddy7397]

sorry, I wasn't using the latest version of srsgnb. that solved the issue. Thanks!