How may CA users can be configured with form 1B PUCCH selection?

Question

I do not see any X2 interface message which has type PUCCH messages. How eNB exchange pucch information ?Which interfaces it uses?

Answer 1

Hi Jagan,

There are some limitation on L1 side to support all the N1 index. Basically N1 index differentiates the HARQ data from different users.
Hardly it supports below 10 user per SF.