RRC IE - antennaInfo
| | +-antennaInfo ::= CHOICE [explicitValue] OPTIONAL:Exist
| | | +-explicitValue ::= SEQUENCE 
| | | +-transmissionMode ::= ENUMERATED [tm4]
| | | +-codebookSubsetRestriction ::= CHOICE [n2TxAntenna-tm4] OPTIONAL:Exist
| | | | +-n2TxAntenna-tm4 ::= BIT STRING SIZE(6) 
| | | +-ue-TransmitAntennaSelection ::= CHOICE [setup]
| | | +-setup ::= ENUMERATED [closedLoop]
The number of CodebookSubsetRestriction bits are defined in 36.213 as follows.
When the number of Antenna is 2, the meaning of each bit is defined in 36.213 as follows.