A method performed by a source communications device, the method comprising: receiving from a target communications device, by an X2 SETUP REQUEST message, information related to a first component carrier used for initial access with the target communications device, among a plurality of component carriers that are aggregated in carrier aggregation, and information related to a second component carrier, among the plurality of component carriers; configuring measurement procedures for a user communications device; receiving a measurement report from the user communications device; making a decision, based on the measurement report received from the user communications device, to hand off the user communications device; sending, to the target communications device, a handover request message comprising a Cell Radio Network Temporary Identifier, C-RNTI, of the user communications device to be handed over to that target communications device, an Access Stratum, AS, configuration, Evolved Radio Access Bearer, E-RAB, context and physical layer identity of a cell operated by the source communications device; and receiving, from the target communications device, first information related to the first component carrier and second information indicating an index related to the second component carrier, wherein the first information and the second information are included in a handover request acknowledge message sent by the target communications device, responsive to the handover request message received from the source communications device, for communication to the user communications device; and wherein the first information and the second information are included in an RRC Connection Reconfiguration message to be sent to the user communications device; further comprising communicating, to the user communications device, the RRC Connection Reconfiguration message including the first information and the second information, wherein the first component carrier and the second component carrier aggregated in carrier aggregation are used by the target communications device for communicating with the user communication device. receiving from a target communications device, by an X2 SETUP REQUEST message, information related to a first component carrier used for initial access with the target communications device, among a plurality of component carriers that are aggregated in carrier aggregation, and information related to a second component carrier, among the plurality of component carriers; configuring measurement procedures for a user communications device; receiving a measurement report from the user communications device; making a decision, based on the measurement report received from the user communications device, to hand off the user communications device; sending, to the target communications device, a handover request message comprising a Cell Radio Network Temporary Identifier, C-RNTI, of the user communications device to be handed over to that target communications device, an Access Stratum, AS, configuration, Evolved Radio Access Bearer, E-RAB, context and physical layer identity of a cell operated by the source communications device; and receiving, from the target communications device, first information related to the first component carrier and second information indicating an index related to the second component carrier, wherein the first information and the second information are included in a handover request acknowledge message sent by the target communications device, responsive to the handover request message received from the source communications device, for communication to the user communications device; and wherein the first information and the second information are included in an RRC Connection Reconfiguration message to be sent to the user communications device; further comprising communicating, to the user communications device, the RRC Connection Reconfiguration message including the first information and the second information, wherein the first component carrier and the second component carrier aggregated in carrier aggregation are used by the target communications device for communicating with the user communication device.