Base station, terminal, and communication system
First Claim
1. A communication system comprising:
- a first base station;
one or more second base stations; and
a terminal,the first base station includesa receiver that receives information about reception time, at which the terminal receives information sent from the first base station by using a first frequency band and receives information sent from the first base station or the one or more second base stations by using one or more second frequency bands or transmission time, at which the first base station sends information by using the first frequency band, and the first base station or the one or more second base stations send information by using one or more second frequency bands,a selector that selects from among the one or more second frequency bands, based on information about the reception time or the transmission time received by the receiver, the second frequency bands that are simultaneously used with the first frequency band by the terminal, anda first controller that performs control about the selected second frequency bands, andthe terminal includesa second controller that performs control, in accordance with the control performed by the first base station, such that communication is performed by simultaneously using the first frequency band and selected second frequency bands,the terminal complies with a control signal that is generated based on a propagation delay difference between first propagation delay and second propagation delay in the first base station to perform communication by using a plurality of cells in which uplink transmission timing and downlink reception timing do not overlap with each other.
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Accused Products
Abstract
A communication system includes: a first base station; one or more second base stations; and a terminal. The first base station includes an acquiring unit that acquires information about reception time, at which the terminal receives information sent from the first base station and the one or more second base stations by using one or more frequency bands or transmission time of each frequency band at the terminal or both, and a first control unit that controls, based on information about the reception time or the transmission time acquired by the acquiring unit, frequency bands that are simultaneously used by the terminal. The terminal includes a second control unit that performs control, in accordance with the control performed by the first base station, such that communication is performed by simultaneously using the frequency bands.
7 Citations
10 Claims
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1. A communication system comprising:
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a first base station; one or more second base stations; and a terminal, the first base station includes a receiver that receives information about reception time, at which the terminal receives information sent from the first base station by using a first frequency band and receives information sent from the first base station or the one or more second base stations by using one or more second frequency bands or transmission time, at which the first base station sends information by using the first frequency band, and the first base station or the one or more second base stations send information by using one or more second frequency bands, a selector that selects from among the one or more second frequency bands, based on information about the reception time or the transmission time received by the receiver, the second frequency bands that are simultaneously used with the first frequency band by the terminal, and a first controller that performs control about the selected second frequency bands, and the terminal includes a second controller that performs control, in accordance with the control performed by the first base station, such that communication is performed by simultaneously using the first frequency band and selected second frequency bands, the terminal complies with a control signal that is generated based on a propagation delay difference between first propagation delay and second propagation delay in the first base station to perform communication by using a plurality of cells in which uplink transmission timing and downlink reception timing do not overlap with each other. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A base station that performs communication with a terminal that performs communication with one or more base stations by simultaneously using a plurality of frequency bands, the base station comprising:
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a receiver that receives at least one of information about reception time, at which the terminal receives information sent from the base station by using a first frequency band and receives information sent from the first base station or one or more base stations other than the base station by using one or more second frequency bands, or transmission time, at which the first base station sends information by using the first frequency band, and the first base station or the one or more second base stations send information by using one or more second frequency bands; and a selector that selects from among the one or more second frequency bands, based on information about the reception time or the transmission time received by the receiver, the second frequency bands that are simultaneously used with the first frequency band by the terminal, the terminal complies with a control signal that is generated based on a propagation delay difference between first propagation delay and second propagation delay in the first base station to perform communication by using a plurality of cells in which uplink transmission timing and downlink reception timing do not overlap with each other.
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9. A terminal that performs communication with one or more base stations by simultaneously using a plurality of frequency bands, the terminal comprising:
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a measuring device that measures reception time of information sent from a first base station by using a first frequency band and that measures reception time of information sent from each of the first base station or a second base station by using a second frequency band; a transmitter that notifies the first base station of at least one of reception time information and information about a candidate for the second frequency band that is simultaneously used with the first frequency band, based on reception time measurement results in the measuring device; a receiver that receives control information about a second frequency band that is selected based on the reception time information or the information about the candidate for the second frequency band and that is simultaneously used with the first frequency band; and a controller that performs control, based on the control information, such that communication is performed by simultaneously using the first frequency band and the second frequency band, the terminal complies with a control signal that is generated based on a propagation delay difference between first propagation delay and second propagation delay in the first base station to perform communication by using a plurality of cells in which uplink transmission timing and downlink reception timing do not overlap with each other.
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10. A terminal that performs communication with one or more base stations by simultaneously using a plurality of frequency bands, the terminal comprising:
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a receiver that receives first transmission time information sent from a first base station by using a first frequency band and that receives second transmission time information sent from each of the first base station and a second base station by using a second frequency band; and a transmitter that notifies the first base station of at least one of the second transmission time information and information about a candidate for the second frequency band that is selected based on the first transmission time information and the second transmission time information and that is simultaneously used with the first frequency band, the terminal complies with a control signal that is generated based on a propagation delay difference between first propagation delay and second propagation delay in the first base station to perform communication by using a plurality of cells in which uplink transmission timing and downlink reception timing do not overlap with each other.
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Specification