Patent ID: 8600395
Filing Date: 2013-12-03
Classification: H04L,H04W

Abstract:
1. A method of configuring a radio connection in a multiple cell system, the method comprising: establishing a first radio connection between a user equipment (UE) and a primary cell and a second radio connection between the UE and a secondary cell, wherein the primary cell and the secondary cell transmit data to the UE using cooperative transmission; receiving, from the UE, channel state information representing channel conditions of the first radio connection and the second radio connection; determining a radio connection to be released from at least one of the first radio connection and the second radio connection based on the channel state information; if the second radio connection is determined as the released radio connection, transmitting, to the UE, a cooperative transmission configuration indicating the release of the second radio connection while keeping the first radio connection; receiving, from the UE, a confirmation message for the cooperative transmission configuration; and if the first radio connection is determined as the released radio connection, releasing the first and second radio connections.