Base station device and mobile communication method

A base station device, which performs radio communication with a user equipment using a first carrier and a second carrier in a mobile communication system, the base station device comprising:

• an uplink signal reception unit configured to receive a first uplink signal and a second uplink signal, the first and second uplink signals being transmitted from the user equipment via carrier aggregation;
• and
• a downlink signal transmission unit configured to transmit a first downlink signal and a second downlink signal to the user equipment via carrier aggregation, wherein
• the downlink signal transmission unit is configured not to simultaneously transmit the first downlink signal and the second downlink signal when the uplink signal reception unit receives the second uplink signal so as to reduce degradation of a reception quality of the first downlink signal in the user equipment, and configured to simultaneously transmit the first downlink signal and the second downlink signal when the uplink signal reception unit does not receive the second uplink signal,
• the first uplink signal being transmitted from the user equipment to the base station device and the first downlink signal being transmitted from the base station device to the user equipment in the first carrier, and the second uplink signal being transmitted from the user equipment to the base station device and the second downlink signal being transmitted from the base station device to the user equipment in the second carrier,
• the user equipment including a duplexer for the second carrier having a function of electrically separating a transmission path from a reception path, the duplexer not considering a frequency band of the first downlink signal, and
• where the second uplink signal degrades the reception quality of the first downlink signal when the user equipment simultaneously receives the first downlink signal and transmits the second uplink signal.

A base station device, which performs radio communication with a user equipment using a first carrier and a second carrier in a mobile communication system, the base station device comprising:

• an uplink signal reception unit configured to receive a first uplink signal and a second uplink signal, the first and second uplink signals being transmitted from the user equipment via carrier aggregation;
• and
• a downlink signal transmission unit configured to transmit a first downlink signal and a second downlink signal to the user equipment via carrier aggregation, wherein
• the downlink signal transmission unit is configured to not to transmit the first downlink signal when the uplink signal reception unit simultaneously receives the first uplink signal and the second uplink signal so as to reduce degradation of a reception quality of the first downlink signal in the user equipment, and configured to transmit the first downlink signal when the uplink signal reception unit does not simultaneously receive the first uplink signal and the second uplink signal,
• the first uplink signal being transmitted from the user equipment to the base station device and the first downlink signal being transmitted from the base station device to the user equipment in the first carrier, and the second uplink signal being transmitted from the user equipment to the base station device and the second downlink signal being transmitted from the base station device to the user equipment in the second carrier,
• the user equipment including a duplexer for the second carrier having a function of electrically separating a transmission path from a reception path, the duplexer not considering a frequency band of the first downlink signal, and
• where the second uplink signal degrades the reception quality of the first downlink signal when the user equipment simultaneously receives the first downlink signal and transmits the second uplink signal.

A mobile communication method, which performs radio communication between a user equipment and a base station device using a first carrier and a second carrier in a mobile communication system, the mobile communication method comprising:

• a step A of receiving a first uplink signal and a second uplink signal, the first and second uplink signals being transmitted from the user equipment via carrier aggregation;
• and
• a step B of transmitting a first downlink signal and a second downlink signal to the user equipment via carrier aggregation,
• wherein in the step B, it is decided not to transmit the first downlink signal when the second uplink signal is received in the step A so as to reduce degradation of the reception quality of the first downlink signal in the user equipment, and to transmit the first downlink signal when the second uplink signal is not received in the step A,
• the first uplink signal being transmitted from the user equipment to the base station device and the first downlink signal being transmitted from the base station device to the user equipment in the first carrier, and the second uplink signal being transmitted from the user equipment to the base station device and the second downlink signal being transmitted from the base station device to the user equipment in the second carrier,
• the user equipment including a duplexer for the second carrier having a function of electrically separating a transmission path from a reception path, the duplexer not considering a frequency band of the first downlink signal, and
• where the second uplink signal degrades the reception quality of the first downlink signal when the user equipment simultaneously receives the first downlink signal and transmits the second uplink signal.

A base station device, which performs radio communication with a user equipment using a first carrier and a second carrier in a mobile communication system, the base station device comprising:

• an uplink transmission instruction unit configured to instruct the user equipment to transmit a first uplink signal and a second uplink signal via carrier aggregation;
• an uplink signal reception unit configured to receive the first uplink signal and the second uplink signal, the first and second uplink signals being transmitted from the user equipment via carrier aggregation;
• and
• a downlink signal transmission unit configured to transmit a first downlink signal and a second downlink signal to the user equipment via carrier aggregation, wherein
• the uplink transmission instruction unit is configured not to instruct to transmit the second uplink signal when the downlink signal transmission unit transmits the first downlink signal so as to reduce degradation of a reception quality of the first downlink signal in the user equipment, and configured to instruct to transmit the second uplink signal when the downlink signal transmission unit does not transmit the first downlink signal,
• the first uplink signal being transmitted from the user equipment to the base station device and the first downlink signal being transmitted from the base station device to the user equipment in the first carrier, and a second uplink signal being transmitted from the user equipment to the base station device and a second downlink signal being transmitted from the base station device to the user equipment in the second carrier,
• the user equipment including a duplexer for the second carrier having a function of electrically separating a transmission path from a reception path, the duplexer not considering a frequency band of the first downlink signal, and
• where the second uplink signal degrades the reception of the first downlink signal when the user equipment simultaneously receives the first downlink signal and transmits the second uplink signal.

A base station device, which performs radio communication with a user equipment using a first carrier and a second carrier in a mobile communication system, the base station device comprising:

• an uplink transmission instruction unit configured to instruct the user equipment to transmit a first uplink signal and a second uplink signal via carrier aggregation;
• an uplink signal reception unit configured to receive a first uplink signal and a second uplink signal, the first and second uplink signals being transmitted from the user equipment via carrier aggregation;
• and
• a downlink signal transmission unit configured to transmit a first downlink signal and a second downlink signal to the user equipment via carrier aggregation, wherein
• the uplink transmission instruction unit is configured to not to instruct to simultaneously transmit the first uplink signal and the second uplink signal when the downlink signal transmission unit transmits the first downlink signal so as to reduce degradation of a reception quality of the first downlink signal in the user equipment, and configured to instruct to simultaneously transmit the first uplink signal and the second uplink signal when the downlink signal transmission unit does not transmit the first downlink signal,
• the first uplink signal being transmitted from the user equipment to the base station device and the first downlink signal being transmitted from the base station device to the user equipment in the first carrier, and the second uplink signal being transmitted from the user equipment to the base station device and the second downlink signal being transmitted from the base station device to the user equipment in the second carrier,
• the user equipment including a duplexer for the second carrier having a function of electrically separating a transmission path from a reception path, the duplexer not considering a frequency band of the first downlink signal, and
• where the second uplink signal degrades the reception quality of the first downlink signal when the user equipment simultaneously receives the first downlink signal and transmits the second uplink signal.

A base station device, which performs radio communication with a user equipment using a first carrier and a second carrier in a mobile communication system, the base station device comprising:

• an uplink transmission instruction unit configured to instruct the user equipment to transmit a first uplink signal and a second uplink signal via carrier aggregation;
• an uplink signal reception unit configured to receive the first uplink signal and the second uplink signal, the first and second uplink signals being transmitted from the user equipment via carrier aggregation;
• and
• a downlink signal transmission unit configured to transmit a first downlink signal and a second downlink signal to the user equipment via carrier aggregation, wherein
• the uplink transmission instruction unit is configured not to instruct to transmit the second uplink signal when the downlink signal transmission unit simultaneously transmits the first downlink signal and the second downlink signal so as to reduce degradation of a reception quality of the first downlink signal in the user equipment, and configured to instruct to transmit the second uplink signal when the downlink signal transmission unit does not simultaneously transmit the first downlink signal and the second downlink signal,
• the first uplink signal being transmitted from the user equipment to the base station device and the first downlink signal being transmitted from the base station device to the user equipment in the first carrier, and the second uplink signal being transmitted from the user equipment to the base station device and the second downlink signal being transmitted from the base station device to the user equipment in the second carrier,
• the user equipment including a duplexer for the second carrier having a function of electrically separating a transmission path from a reception path, the duplexer not considering a frequency band of the first downlink signal,
• where the second uplink signal degrades the reception quality of the first downlink signal when the user equipment simultaneously receives the first downlink signal and transmits the second uplink signal.

A mobile communication method, which performs radio communication between a user equipment and a base station device using a first carrier and a second carrier in a mobile communication system, the mobile communication method comprising:

• a step A of instructing the user equipment to transmit a first uplink signal and a second uplink signal, the first and second uplink signals being transmitted from the user equipment via carrier aggregation;
• a step B of receiving the first uplink signal and the second uplink signal, the first and second uplink signals being transmitted from the user equipment via carrier aggregation, and
• a step C of transmitting a first downlink signal and a second downlink signal to the user equipment via carrier aggregation, wherein
• in the step A, it is decided not to instruct to transmit the second uplink signal when the first downlink signal is transmitted in the step C so as to reduce degradation of a reception quality of the first downlink signal in the user equipment, and to instruct to transmit the second uplink signal when the first downlink signal is not transmitted in the step C,
• the first uplink signal being transmitted from the user equipment to the base station device and the first downlink signal being transmitted from the base station device to the user equipment in the first carrier, and the second uplink signal being transmitted from the user equipment to the base station device and the second downlink signal being transmitted from the base station device to the user equipment in the second carrier,
• the user equipment including a duplexer for the second carrier having a function of electrically separating a transmission path from a reception path, the duplexer not considering a frequency band of the first downlink signal, and
• where the second uplink signal degrades the reception quality of the first downlink signal when the user equipment simultaneously receives the first downlink signal and transmits the second uplink signal.