FIELD: radio engineering, communication.
SUBSTANCE: handover method includes steps of: obtaining, by UE, a Time Advance (TA) of a target cell before handover; and obtaining an Uplink Grant (UL Grant) sent by the target cell; and then sending a Handover Complete message to the target cell with the TA on a resource that corresponds to the UL Grant.
EFFECT: cutting handover delay in the control plane and delay in data transmission interruption in the user plane.
11 cl, 13 dwg
