USER EQUIPMENT ASSISTED CONFIGURATION OF TIMING ADVANCE GROUPS

摘要

A network sends to a user equipment UE configuration for a new secondary cell (SCell) and an indication to check a timing advance (TA) on it. The UE checks to see if the primary cell (PCell) TA is useable on the SCell by calculating the SCell TA and comparing it to the PCell TA. If the PCell TA is not useable on the SCell, the UE sends timing assistance information to the network informing that a TA other than the PCell TA is needed, and possibly a recommended TA group. The network uses the timing assistance information to select a TA group for the UE on the SCell.