Base Station Apparatus, User Equipment, Method Used In Mobile Communications System Performing Handover Between Bandwidths

A method used by a base station apparatus of a mobile communication system performing communications using all or a part of a system bandwidth, the method comprising:

• receiving a request signal requesting handover between bandwidths from a user equipment;
• transmitting an instruction signal to one or more peripheral base stations of a handover transfer destination candidate according to the request signal;
• receiving a response signal responsive to the instruction signal from the one or more peripheral base stations;
• transmitting an individual control signal, including at least frequency information of a channel measurement signal of the handover transfer destination candidate, to the user equipment according to the response signal;
• wherein the channel measurement signal is transmitted from the one or more peripheral base stations in a frequency of the frequency information according to the instruction signal.

A base station apparatus used in a mobile communication system performing communications using all or a part of a system bandwidth, the base station apparatus comprising:

• a receiving part to receive an instruction signal from a transfer origin base station of a handover caused by a request for handover between bandwidths from a user equipment;
• a first transmission part to transmit a response signal according to the instruction signal so that at least frequency information of a channel measurement signal is notified to the user equipment;
• a second transmission part to transmit the channel measurement signal in a frequency of the frequency information according to the instruction signal;
• wherein an individual control signal including at least the frequency information of the channel measurement signal is transmitted from the transfer origin base station to the user equipment.

A method used by a base station apparatus of a mobile communication system performing communications using all or a part of a system bandwidth, the method comprising:

• receiving an instruction signal from a transfer origin base station of a handover caused by a request for handover between bandwidths from a user equipment;
• transmitting a response signal according to the instruction signal so that at least frequency information of a channel measurement signal is notified to the user equipment;
• and
• transmitting the channel measurement signal in a frequency of the frequency information according to the instruction signal;
• wherein an individual control signal including at least the frequency information of the channel measurement signal is transmitted from the transfer origin base station to the user equipment.

A user equipment used in a mobile communication system performing communications using all or a part of a system bandwidth, the user equipment comprising:

• a transmission part to transmit a request signal requesting handover between bandwidths to a transfer origin base station of the handover;
• a first receiving part to receive an individual control signal, including at least frequency information of a channel measurement signal of one or more handover transfer destination candidates, from the transfer origin base station;
• and
• a second receiving part to receive the channel measurement signal in a frequency of the frequency information from one or more peripheral base stations of the handover transfer destination candidates.

A method used by a user equipment of a mobile communication system performing communications using all or a part of a system bandwidth, the method comprising:

• transmitting a request signal requesting handover between bandwidths to a transfer origin base station of the handover;
• receiving an individual control signal, including at least frequency information of a channel measurement signal of one or more handover transfer destination candidates, from the transfer origin base station;
• and
• receiving the channel measurement signal in a frequency of the frequency information from one or more peripheral base stations of the handover transfer destination candidates.