Patent ID: 9055491
Filing Date: 2015-06-09
Classification: H04W

Abstract:
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.