Patent ID: 8571556
Filing Date: 2013-10-29
Classification: H04W

Abstract:
1. A method of communicating signals in a mobile communication system including a mobile station, a first base station, a second base station, and a base station controlling node, the method comprising: receiving signaling at the first base station from the base station controlling node, the signaling being received via a first interface between the first base station and the base station controlling node; receiving, at the first base station from the second base station during a handover, a control message including at least one sequence number indicating at least one data unit to be transmitted to the mobile station, the first base station and the second base station each including a radio link control (RLC) layer; and transmitting, at the first base station to the mobile station, the at least one data unit through the RLC layer of the first base station, wherein the first base station receives the control message from the second base station via a direct interface between the first base station and the second base station, wherein the direct interface including X2 interface, wherein the direct interface is different than the first interface between the first base station and the base station controlling node, and wherein the at least one sequence number is managed by a packet data convergence protocol (PDCP) layer.