Method, device and system for performing wireless communication in wireless communication system

A wireless communication method comprising:

• performing communication, using a processor, with a first node and a second node with multiple component carriers, said communication including:
• setting a downlink component carrier associated with the first node as a downlink primary component carrier, setting an uplink component carrier associated with the second node for transmitting Physical Uplink Control Channel (PUCCH), and changing the downlink primary component carrier only in a condition of handover,
• wherein the communication includes transmitting an uplink control signaling on the PUCCH via the uplink component carrier associated with the second node, and transmitting, using the circuitry, Physical Uplink Shared Channel (PUSCH) signals together with the PUCCH via the uplink component carrier associated with the second node, setting another uplink component carrier associated with the first node for transmitting PUCCH, and the communication includes receiving, via radio Resource Control (RRC) signaling from the first node, designation information regarding an uplink primary component carrier to override a default uplink primary component carrier.

A communication device residing in a second node operational in a communication system, the communication system including a first node and user equipment, the communication device comprising:

• circuitry configured to communicate with the user equipment in cooperation with the first node with multiple component carriers,
• wherein a downlink component carrier associated with the first node is set as a downlink primary component carrier, an uplink component carrier associated with the second node is set for transmitting Physical Uplink Control Channel (PUCCH), and the downlink primary component carrier is changed only in a condition of handover, wherein the circuitry is further configured to, receive from the user equipment an uplink control signaling via the uplink component carrier associated with the second node, and receive Physical Uplink Shared Channel (PUSCH) signals together with the PUCCH via the uplink component carrier associated with the second node, setting another uplink component carrier associated with the first node for transmitting PUCCH, and receive, via Radio Resource Control (RRC) signaling from the first node, designation information regarding an uplink primary component carrier to override a default uplink primary component carrier.

A wireless communication method comprising:

• performing communication, using a processor, with a first node and a second node with multiple component carriers, said communication including:
• setting a downlink component carrier associated with the first node as a downlink primary component carrier, and setting an uplink component carrier associated with the second node for transmitting Physical Uplink Control Channel (PUCCH), wherein the communication includes transmitting an uplink control signaling via the uplink component carrier associated with the second node, and
• wherein the communication includes receiving, via Radio Resource Control (RRC) signaling, designation information regarding an uplink primary component carrier for transmitting the PUCCH, setting another uplink component carrier associated with the first node for transmitting PUCCH, and overriding a default uplink primary component carrier.