Patent ID: 8934467
Filing Date: 2015-01-13
Classification: H04W

Abstract:
1. A random access method, comprising: determining a secondary cell configured for a UE and obtaining random access related parameter preset for the secondary cell; and sending the random access related parameter to the UE to instruct the UE to initiate random access procedure over the secondary cell corresponding to the random access related parameter, wherein sending the random access related parameter to the UP to instruct the UE to initiate the random access procedure over the secondary cell corresponding to the random access related parameter comprises: instructing the UE to initiate the random access procedure over the secondary cell corresponding to the random access related parameter immediately after sending the random access related parameter to the UE; or sending a physical downlink control channel command to the UE after sending the random access related parameter to the UE to instruct the UE to initiate the random access procedure over the secondary cell corresponding to the random access related parameter; wherein, if the secondary cell is detected to belong to a Timing Advance (TA) group, applying Timing Advance (TA) information preset for the secondary cell in the random access procedure to all cells comprised in the TA group, and maintaining a Time Alignment Timer (TAT) of the TA group with use of the TA information.