which category UEs supports carrier Agregation ?

Question

from Which Category UE CA support enabled ( CAT 4 or 5). In which IE UE tells about its Category to network ?

Answer 1

UEs of category 4 and onwards support carrier aggregation. There is an IE "supportedBandCombination" which exactly tell to eNodeB what combination of bands UE can support for carrier aggregation. For details you can check UE Capability Information message defined in RRC and S1-AP specifications.

Comments

Hi vimal,

Thanks vimal for your answer. yes, i do know about those IEs. supported band combinations, bandwidth classes, bandwidth combination sets . but when UE reports its category, how Network decides particular category UE supports CA or not.

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During the attach procedure, eNodeB executes UE capability enquiry procedure. As result, eNodeB gets the UE capability and takes actions based on the supported features. eNodeB also forwards this UE capability information to MME. Next time when UE makes radio connection with eNodeB, this UE capability information is provided by MME to eNodeB so that eNodeB does not need to execute UE capability transfer procedure.

Answer 2

Excellent,

Category 6,9,12,15, and last but most key category Eight -all of these support Carrier Aggregation