User equipment radio frequency and band capability for carrier aggregation measurement gap

In brief, circuit is included according to one or more embodiments, user equipment (UE), the circuit is used for：Network is connected to via serving cell；And UE measurement gap ability is indicated to network.Measurement gap ability includes the information that whether UE supports carrier aggregation (CA) particular measurement gap and whether UE has two or more radio frequency (RF) chains.Then, UE receives the CA particular measurement gap configurations for two or more RF chains from network.