Handover device of wireless communication system using multi-component carrier and method thereof

1. A method of performing a handover in a communication system that uses a multi-component carrier (CC), the method comprising:

receiving, by a source evolved Node B (SeNB), a measurement result transmitted from a user equipment (UE);

generating, by the SeNB, a handover request message including at least one of information associated with at least one CC configured for the UE and information associated with a capability of the UE associated with the at least one CC, and transmitting the handover request message to a target eNB (TeNB);

generating, by the TeNB, a handover request acknowledgement (ACK) message including at least one of CC allocation information (CC Allocation Info) corresponding to information associated with CCs to be used by the UE, both the CC allocation information and a CC activation indicator (CC Activation Ind) associated with the CC allocation information, and an active configuration indicator having a predetermined bit length with respect to allocated CCs, in response to the handover request message, and transmitting the handover request ACK message to the SeNB;

transmitting, from the SeNB to the UE, a handover command message generated based on the handover request ACK message, the handover command message being configured for the UE to determine CC allocation information included in the handover command message and to complete the handover to the TeNB,

wherein the CC allocation information included in the handover command message includes information associated with CCs to be used in the TeNB and further includes at least one of CC allocation information associated with CCs allocated to the UE, information associated with an amount of allocated resources, information associated with a number of used CCs, information associated with a bandwidth of each CC, center frequency information, scheduling information, and antenna port number information.

2. The method as claimed in claim 1 , wherein the information associated with the at least one CC configured for the UE corresponds to information associated with the CCs configured by the SeNB for the UE, and the information is configured in a form of configuration list (ConfigList).

3. The method as claimed in claim 2 , wherein the information associated with the at least one CC configured for the UE further comprises radio resource configuration information associated with the CCs configured by the SeNB for the UE.

4. The method as claimed in claim 3 , wherein the information associated with the at least one CC configured for the UE corresponds to information associated with CC(s) that is set by the SeNB for the UE to simultaneously use a plurality of CCs, and corresponds to CC use information including at least one of CC allocation information associated with CCs allocated to the UE, information associated with an amount of allocated resources, information associated with a number of used CCs, information associated with a bandwidth of each CC, center frequency information, and scheduling information.

5. The method as claimed in claim 1 , wherein the active configuration indicator comprises:

information indicating activation in which the CCs configured for the UE are capable of transceiving a packet, or deactivation in which the CCs are incapable of transmitting a packet,

wherein the active configuration indicator has a variable length that varies based on a number of the CCs configured for the UE, and indicates activation or deactivation of a corresponding CC through use of a bit.

6. The method as claimed in claim 5 , wherein the active configuration indicator comprises:

information indicating activation or deactivation with respect to each of secondary CCs (SCCs) excluding a primary CC (PCC) from among the CCs configured for the UE.

7. The method as claimed in claim 1 , further comprising:

determining, by the UE, the CC activation indicator included in the handover command message; and

completing the handover to the TeNB through use of the CC activation indicator without performing a Radio Resource Connection (RRC) procedure with respect to the TeNB and the CC to be used, and transceiving a packet.

8. A handover signaling apparatus in a communication system that uses a multi-component carrier (CC), the apparatus comprising:

a processor to generate a handover request message including at least one of information associated with at least one CC configured for a user equipment (UE) and information associated with a capability of the UE associated with the at least one CC; and

a transceiver, to transmit the handover request message to a target evolved NodeB (TeNB)

and to receive, from the TeNB, a handover request acknowledgement (ACK) message configured by the TeNB to include at least one of CC allocation information (CC Allocation Info) corresponding to information associated with CCs to be used by the UE, both the CC allocation information and a CC activation indicator (CC Activation Ind) associated with the CC allocation information, and an active configuration indicator having a predetermined bit length with respect to allocated CCs,

wherein the transceiver transmits, to the UE, a handover command message generated based on the handover request ACK message, the handover command message being configured for the UE to determine CC allocation information included in the handover command message and to complete the handover to the TeNB, and

wherein the CC allocation information included in the handover command message includes information associated with CCs to be used in the TeNB and further includes at least one of CC allocation information associated with CCs allocated to the UE, information associated with an amount of allocated resources, information associated with a number of used CCs, information associated with a bandwidth of each CC, center frequency information, scheduling information, and antenna port number information.

9. A handover signaling apparatus in a communication system that uses a multi-component carrier (CC), the apparatus comprising:

a transceiver to receive, from a source evolved NodeB (SeNB), a handover request message including at least one of information associated with at least one CC configured for a user equipment (UE) and information associated with a capability of the UE associated with the at least one CC; and

a processor to generate, in response to the handover request message, a handover request acknowledgement (ACK) message including at least one of CC allocation information (CC Allocation Info) corresponding to information associated with CCs to be used by the UE, both the CC allocation information (CC Allocation Info) and a CC activation indicator (CC Activation Ind) associated with the CC allocation information, and an active configuration indicator having a predetermined bit length with respect to allocated CCs; and

completing a handover of the UE moving from the SeNB to the apparatus,

wherein the transceiver transmits the handover request ACK message to the SeNB,

wherein the handover is completed after the SeNB transmits, to the UE, a handover command message generated based on the handover request ACK message, the handover command message being configured for the UE to determine CC allocation information included in the handover command message and to complete the handover to the apparatus, and

wherein the CC allocation information included in the handover command message includes information associated with CCs to be used in the TeNB and further includes at least one of CC allocation information associated with CCs allocated to the UE, information associated with an amount of allocated resources, information associated with a number of used CCs, information associated with a bandwidth of each CC, center frequency information, scheduling information, and antenna port number information.

10. A user equipment (UE) in a communication system that uses a multi-component carrier (CC), the UE comprising:

a transceiver to receive a handover command message that is generated and transmitted by a source evolved NodeB (SeNB), the handover command message being configured based on a handover request acknowledgement (ACK) message configured by a target eNB (TeNB) to include at least one of CC allocation information (CC Allocation Info) corresponding to information associated with CCs to be used by the UE, both the CC allocation information (CC Allocation Info) and a CC activation indicator (CC Activation Ind) associated with the CC allocation information, and an active configuration indicator having a predetermined bit length with respect to allocated CCs; and

a processor to determine CC allocation information included in the handover command message, and to complete a handover to the TeNB based on the handover command message,

wherein the CC allocation information included in the handover command message includes information associated with CCs to be used in the TeNB and further includes at least one of CC allocation information associated with CCs allocated to the UE, information associated with an amount of allocated resources, information associated with a number of used CCs, information associated with a bandwidth of each CC, center frequency information, scheduling information, and antenna port number information.