Mobile communication system, communication control method, base station, user terminal and processor

A communication control method used in a mobile communication system comprising a user terminal that receives a desired wave signal from a serving cell and an interference wave signal that is a signal to another user terminal and a first base station that manages the serving cell;

• a second base station that manages a neighbor cell to which the another user terminal is connected and which is adjacent to the serving cell;
• and a management device that manages the first base station and the second base station, the communication control method comprising the steps of:
• by the first base station,
• receiving information used for generating the interference replica signal from at least one of the second base station, the management device, and the user terminal;
• generating, on the basis of the information received, an interference replica signal corresponding to the interference wave signal;
• superposing the interference replica signal on the desired wave signal;
• and
• transmitting the desired wave signal superposed with the interference replica signal to the user terminal, wherein
• the interference replica signal is generated such that the interference replica signal received by the user terminal cancels the interference wave signal received by the user terminal.

A base station, which manages a serving cell in a mobile communication system including a user terminal that receives a desired wave signal from the serving cell and an interference wave signal that is a signal to another user terminal, comprising:

• a controller that generates an interference replica signal corresponding to the interference wave signal and to superpose the interference replica signal on the desired wave signal;
• a transmitter that transmits, to the user terminal, the desired wave signal superposed with the interference replica signal;
• and
• a receiver that receives information used for generating the interference replica signal from at least one of another base station that manages a neighbor cell to which the another user terminal is connected and which is adjacent to the serving cell, a management device that manages the base station and the another base station, and the user terminal, wherein
• the controller generates the interference replica signal such that the interference replica signal received by the user terminal cancels the interference wave signal received by the user terminal, and
• the controller generates the interference replica signal on the basis of the information received by the receiver.

A base station, which manages a neighbor cell in a mobile communication system including a user terminal that receives a desired wave signal from a serving cell and an interference wave signal from the neighbor cell adjacent to the serving cell, wherein:

• another base station that manages the serving cell transmits an interference replica signal corresponding to the interference wave signal by superposing the interference replica signal on the desired wave signal,
• the base station includes a transmitter communicatively coupled to a memory, the transmitter transmitting to the another base station, information used for generating the interference replica signal,
• the information used for generating the interference replica signal includes waveform information relating to a signal waveform of the interference wave signal, and
• the interference replica signal is generated by the another base station such that the interference replica signal received by the user terminal cancels the interference wave signal received by the user terminal.

A user terminal that receives a desired wave signal from a serving cell and an interference wave signal that is a signal to another user terminal,

• the user terminal comprising:
• a transmitter communicatively coupled to a memory, the transmitter transmitting, to a first base station that manages the serving cell, information used for generating an interference replica signal, wherein
• the information used for generating the interference replica signal is received power information indicating received power about a reference signal received by the user terminal from a second base station, and
• the first base station transmits the interference replica signal corresponding to the interference wave signal by superposing the interference replica signal on the desired wave signal.

A processor communicatively coupled to a memory and provided in a base station that manages a serving cell in a mobile communication system including a user terminal that receives a desired wave signal from the serving cell and an interference wave signal that is a signal to another user terminal, wherein the processor executes:

• a generation process of generating an interference replica signal corresponding to the interference wave signal;
• a superposition process of superposing the interference replica signal on the desired wave signal;
• a transmission process of transmitting the desired wave signal superposed with the interference replica signal to the user terminal;
• and
• a reception process of receiving information used for generating the interference replica signal from at least one of another base station that manages the neighbor cell to which the another user terminal is connected and which is adjacent to the serving cell, a management device that manages the base station and the another base station, and the user terminal, wherein
• in the generation process, the interference replica signal is generated on the basis of the received information, and
• in the generation process, the interference replica signal is generated such that the interference replica signal received by the user terminal cancels the interference wave signal received by the user terminal.

A processor communicatively coupled to a memory and provided in a base station that manages a neighbor cell in a mobile communication system including a user terminal that receives a desired wave signal from a serving cell and an interference wave signal from the neighbor cell adjacent to the serving cell, wherein:

• another base station that manages the serving cell transmits an interference replica signal corresponding to the interference wave signal by superposing the interference replica signal on the desired wave signal,
• the processor performs a process of transmitting, to the another base station, the information used for generating the interference replica signal,
• the information used for generating the interference replica signal includes waveform information relating to a signal waveform of the interference wave signal, and
• the interference replica signal is generated by the another base station such that the interference replica signal received by the user terminal cancels the interference wave signal received by the user terminal.