Patent ID: 9107154
Filing Date: 2015-08-11
Classification: H04W

Abstract:
1. An information notification method, comprising: a base station determining mapping relationships between cell and Timing Advance, TA, group; and the base station sending the determined mapping relationships between cell and TA group to a User Equipment, UE, by a system information or RRC signaling; wherein after the base station sends the determined mapping relationships between cell and TA group to the UE, the method further comprises: upon determining a cell to be newly added in a set of cells configured for the UE, the base station sending to the UE RRC signaling for configuring the UE with the newly added cell, so that the UE can determine a TA group corresponding to a newly added cell configured for the UE by the base station according to the mapping relationships, determine whether there is a cell, having established uplink synchronization with the based station, in the TA group, and if so, then regard a TA of the cell as a TA for uplink transmission in the newly added cell.