Patent ID: 8411642

Claim:
A random access method, comprising: determining at least one target component carrier to which a User Equipment (UE) is to be handed over, and notifying the UE of information about the at least one target component carrier through a source evolved Node B (eNB); after receiving a dedicated random access preamble sent by the UE, sending a random access response message on at least one component carrier in the at least one target component carrier; wherein determining the at least one target component carrier and notifying the UE of the information about the at least one target component carrier through the source eNB comprises: determining the at least one target component carrier according to a handover request message after receiving the handover request message sent by the source eNB, notifying the source eNB of the information about the at least one target component carrier through a handover request acknowledgement message, and sending, by the source eNB, the at least one target component carrier to the UE through a handover command; wherein determining the at least one target component carrier according to the handover request message after receiving the handover request message sent by the source eNB comprises: receiving the handover request message sent by the source eNB, wherein the handover request message comprises the UE's capability information about the at least one target component carrier being supported and information of a target component carrier selected by the source eNB, and the target component carrier selected is a carrier to which the UE is to be handed over, and determining whether to allow the at least one target component carrier selected by the source eNB; if the at least one target component carrier selected by the source eNB is allowed, the notifying the source eNB of the information about the at least one target component carrier through the handover request acknowledgement message comprises: sending the handover request acknowledgement message to the source eNB, wherein the handover request acknowledgement message comprises acknowledgement information of the target component carrier selected by the source eNB or the information about the target component carrier selected by the source eNB; and if the at least one target component carrier selected by the source eNB is not allowed, configuring the at least one target component carrier, and the notifying the source eNB of the information about the at least one target component carrier through the handover request acknowledgement message comprises: sending the handover request acknowledgement message to the source eNB, wherein the handover request acknowledgement message comprises the information about the at least one target component carrier configured.