Patent ID: 8531990
Filing Date: 2013-09-10
Classification: H04L,H04W

Abstract:
1. A method comprising: a) receiving, by a serving base station, a first radio resource control (RRC) message from a wireless device, said first RRC message comprising one or more parameters indicating whether said wireless device supports an enhanced physical downlink control channel (ePDCCH), said ePDCCH being a downlink channel configured to carry scheduling information for a plurality of downlink packets and a plurality of uplink packets; b) transmitting, by said serving base station, selectively and if said one or more parameters indicates support of said ePDCCH, at least one second RRC message configured to cause, in said wireless device, configuration of: c) receiving, by said serving base station, at least one measurement report from said wireless device, said at least one measurement report comprising signal quality information of at least one of said at least one carrier of at least one of said one or more target base stations, said signal quality information derived at least in part employing measurements of at least one OFDM subcarrier; d) making a handover decision for said wireless device, by said serving base station, based at least in part on said at least one measurement report; and e) transmitting, by said serving base station and in response to said serving base station making said handover decision, at least one third message to at least one target base station, said at least one third message comprising at least one of: