Patent ID: 8903433

Claim:
A paging method of a user equipment in a carrier aggregation environment, the method comprising: selecting a component carrier set of the user equipment by selecting a component carrier for each of a plurality of component carrier elements of the user equipment; camping on a cell through the component carrier selected for each component carrier element; receiving a paging message from an evolved Node-B (eNB); verifying a component carrier set that is included in the paging message and thereby is received; comparing the received component carrier set with the component carrier set of the user equipment; and setting up a connection with the eNB through the component carrier set of the user equipment, when the received component carrier set is the same as the component carrier set of the user equipment, or when all the component carriers are included in the received component carrier set, wherein the setting up comprises performing a random access through a primary component carrier included in the component carrier set of the user equipment, wherein the performing comprises performing the random access of the primary component carrier using a dedicated preamble of the primary component carrier, when the dedicated preamble of the primary component carrier is included in the received component carrier set.