Patent ID: 9749927
Date: 2017-08-29
CPC Classifications: H04W

Claim:
1. A method, comprising: configuring a mobile terminal with a time-aligned uplink reference cell; measuring, by the mobile terminal, downlink reception time difference information between a beginning of a first downlink subframe on a target cell that is a non-time-aligned uplink target cell and a beginning of a second downlink subframe on the reference cell, wherein the first downlink subframe and the second downlink subframe refer to a same subframe number; determining, by the mobile terminal, a first target timing advance based on at least the measured reception time difference information and on a reference timing advance used for uplink transmissions on the time-aligned reference cell; time-aligning, by the mobile terminal, the uplink target cell by adjusting a timing for uplink transmissions on the uplink target cell based on the determined first target timing advance; and performing a handover of the mobile terminal to the target cell based on the measurement results and the first target timing advance.