Method for reporting multi-connection transmission capability, method for configuring multi-connection transmission mode, method for preventing retransmission of data, UE and base station

A User Equipment (UE), comprising:

• receiving circuitry configured to receive a radio resource control (RRC) reconfiguration message which includes a first indication used to indicate whether or not duplication is configured for a radio bearer with a Packet Data Convergence Protocol (PDCP) entity associated with more than one Radio Link Control (RLC) entity;
• processing circuitry configured to configure the radio bearer based on the RRC reconfiguration message;
• and
• transmitting circuitry configured to transmit an RRC Reconfiguration complete message which is used to confirm successful completion of an RRC connection reconfiguration;
• wherein
• in a case that the duplication is configured for the radio bearer, the processing circuitry is further configured to cause the PDCP entity of the radio bearer to:
• submit respective PDCP protocol data units (PDUs), which are same as each other, to all of the more than one RLC entity, and
• in response to the PDCP entity receiving, from one of the more than one RLC entity, a notification indicating that a corresponding one of the PDCP PDUs is successfully delivered by the one of the more than one RLC entity, indicate to all remaining one or more of the more than one RLC entity to discard respective one or more of the PDCP PDUs.