How to know if a network can support CA from the SIB information?

4G LTE
1

How to know if a network can support CA from the SIB information?

I only have the log of SIB messages in a foreign network, but I want to know if it can support CA.
I find there are many networks can support CA and claim the capability of enable64QAM-v1270 in the SIB2. I want to know if I can infer the CA capability from the enable64QAM-v1270 or other IE.

TS36.331:
enable64QAM-v1270 ENUMERATED {true}
enable64QAM
See TS 36.213 [23], clause 8.6.1. If enable64QAM (without suffix) is set to TRUE, it indicates that 64QAM is allowed for UE categories 5 and 8 indicated in ue-Category and UL categories indicated in ue-CategoryUL which support UL 64QAM and can fallback to category 5 or 8, see TS 36.306 [5], Table 4.1A-2 and Table 4.1A-6, while FALSE indicates that 64QAM is not allowed. If enable64QAM-v1270 is set to TRUE, it indicates that 64QAM is allowed for UL categories indicated in ue-CategoryUL which support UL 64QAM but cannot fallback category 5 or 8, see TS 36.306 [5], Table 4.1A-2 and Table 4.1A-6. E-UTRAN configures enable64QAM-v1270 only when enable64QAM (without suffix) is set to TRUE.

2

The closest you can get is by checking if there is SIB5 being broadcasted, and if so, what are the carriers being sent.

There is no guarantee that the carriers on SIB5 are co-located to the serving cell, but I guess it is the close you can get by SIBs.