We Claim:
1. A base station comprising:
a controller to perform control to transmit a plurality of signals that is common to each terminal to a terminal located in a coverage area of its own base station by transmitting the plurality of signals at the same timing while frequency multiplexing the plurality of signals on a frequency domain in an area where the signals can be transmitted simultaneously using a beam within the coverage area, and transmitting the plurality of signals a plurality of times while changing the area; and
an antenna to transmit the plurality of signals area by area while changing a direction of the beam under the control of the controller.
2. The base station according to claim 1, wherein
when a transmission period of one or more first
signals is longer than a transmission period of a second signal other than the first signal among the plurality of signals, the controller performs control to reduce transmission of the first signal while allowing the first signal to be transmitted at the same timing as the second signal.
3. The base station according to claim 1, wherein
when a transmission period of two or more third
signals is longer than a transmission period of a fourth signal other than the third signals among the plurality of signals, the controller performs control to allocate the same frequency position as a transmission resource of its own base station and a reception resource of the terminal to the two or more third signals, and time multiplex the two or more third signals for transmission.

4. A base station comprising:
a controller to perform control to receive a plurality of signals from a terminal located in a coverage area of its own base station by receiving the plurality of signals at the same timing while frequency multiplexing the plurality of signals on a frequency domain in an area where the signals can be received simultaneously using a beam within the coverage area, and receiving the plurality of signals a plurality of times while changing the area; and
an antenna to receive the plurality of signals area by area while changing a direction of the beam under the control of the controller.
5. The base station according to claim 4, wherein
when a transmission/reception period of one or more
first signals is longer than a transmission/reception period of a second signal other than the first signal among the plurality of signals, the controller performs control to cause the terminal to reduce transmission of the first signal while allowing the terminal to transmit the first signal at the same timing as the second signal.
6. The base station according to claim 4, wherein
when a transmission/reception period of two or more
third signals is longer than a transmission/reception period of a fourth signal other than the third signals among the plurality of signals, the controller performs control to allocate the same frequency position as a transmission resource of the terminal and a reception resource of its own base station to the two or more third signals, and cause the terminal to time multiplex the two or more third signals for transmission.

7. The base station according to any one of claims 1 to 6,
wherein
the controller performs control to transmit and
> receive a quality measurement signal that is transmitted
from its own base station and a measurement result report
that is a signal reported to its own base station and
indicating a result of measurement of reception quality of
the quality measurement signal received by the terminal,
i the controller performing control such that:
the quality measurement signal and the measurement result report are transmitted and received between its own base station and the terminal by using a frame format that is defined exclusively for transmitting and receiving the
> quality measurement signal and the measurement result
report.
8. The base station according to claim 7, wherein
the controller performs control to use a second frame i format corresponding to a later timing than a first frame format in which the quality measurement signal is transmitted to the terminal, and receive, from the terminal, the measurement result report for the quality measurement signal transmitted in the first frame format. >
9. The base station according to any one of claims 1 to 6,
wherein
the controller performs control to transmit and receive a quality measurement signal that is transmitted i from its own base station and a measurement result report that is a signal reported to its own base station and indicating a result of measurement of reception quality of the quality measurement signal received by the terminal,

the controller performing control such that:
the quality measurement signal is transmitted and received between its own base station and the terminal using a frame format that is obtained by defining an area for the quality measurement signal or areas for the quality measurement signal and the measurement result report in a frame format having a data area; and
the measurement result report is transmitted and received between its own base station and the terminal using a frame format that is obtained by defining an area for the measurement result report or areas for the quality measurement signal and the measurement result report in a frame format having the data area, and
the controller performs control to include, in a control signal area within the frame format, information on a frame format to be used including a frame format that has the data area but does not have areas defined for the quality measurement signal and the measurement result report, and notify the terminal of the information.
10. The base station according to claim 9, wherein
the controller performs control to include, in the
control signal area, a length of the data area or information on an identification number of a frame format for identifying the frame format in use, and notify the terminal using the data area of the information.
11. The base station according to any one of claims 1 to 6,
wherein
the controller performs control to transmit and receive a quality measurement signal that is transmitted from its own base station and a measurement result report that is a signal reported to its own base station and

indicating a result of measurement of reception quality of the quality measurement signal received by the terminal, the controller performing control such that:
the quality measurement signal is transmitted and received between its own base station and the terminal using a frame format that is obtained by defining an area for the quality measurement signal in a frame format having a data area; and
the measurement result report is transmitted and received between its own base station and the terminal using a frame format that is obtained by defining an area for the measurement result report in a frame format used for a signal periodically transmitted from the terminal to its own base station.
12. A terminal comprising:
a controller to perform control to receive a plurality of signals at the same timing by receiving a signal in which the plurality of signals is frequency-multiplexed on a frequency domain from the base station according to any one of claims 1 to 3.
13. A terminal comprising:
a controller to perform control to transmit a plurality of signals at the same timing to the base station according to any one of claims 4 to 6 while frequency multiplexing the plurality of signals on a frequency domain.
14. The terminal according to claim 12 or 13, wherein
the controller performs control to transmit and
receive a quality measurement signal that is transmitted from the base station and a measurement result report that is a signal reported to its own base station and indicating

a result of measurement of reception quality of the quality measurement signal received by its own terminal, the controller performing control such that:
the quality measurement signal and the measurement result report are transmitted and received between the base station and its own terminal by using a frame format that is defined exclusively for transmitting and receiving the quality measurement signal and the measurement result report.
15. The terminal according to claim 14, wherein
the controller performs control to use a second frame format corresponding to a later timing than a first frame format in which the quality measurement signal for its own terminal is received, and transmit, from its own terminal, the measurement result report for the quality measurement signal received in the first frame format.
16. The terminal according to claim 12 or 13, wherein
the controller performs control to transmit and
receive a quality measurement signal that is transmitted from the base station and a measurement result report that is a signal reported to its own base station and indicating a result of measurement of reception quality of the quality measurement signal received by its own terminal, the controller performing control such that:
the quality measurement signal is transmitted and received between the base station and its own terminal using a frame format that is obtained by defining an area for the quality measurement signal or areas for the quality measurement signal and the measurement result report in a frame format having a data area; and
the measurement result report is transmitted and

received between the base station and its own terminal using a frame format that is obtained by defining an area for the measurement result report or areas for the quality measurement signal and the measurement result report in a frame format having the data area, and
the controller is notified, from the base station, of information on a frame format to be used including a frame format that has the data area but does not have areas defined for the quality measurement signal and the measurement result report through a control signal area within the frame format.
17. The terminal according to claim 16, wherein
when its own terminal uses the data area, the
controller is notified, from the base station, of a length of the data area or information on an identification number of a frame format for identifying the frame format in use through the control signal area.
18. The terminal according to claim 12 or 13, wherein
the controller performs control to transmit and
receive a quality measurement signal that is transmitted from the base station and a measurement result report that is a signal reported to its own base station and indicating a result of measurement of reception quality of the quality measurement signal received by its own terminal, the controller performing control such that:
the quality measurement signal is transmitted and received between the base station and its own terminal using a frame format that is obtained by defining an area for the quality measurement signal in a frame format having a data area; and
the measurement result report is transmitted to the

base station using a frame format that is obtained by defining an area for the measurement result report in a frame format used for a signal periodically transmitted from its own terminal to the base station.
19. A wireless communication system comprising:
the base station according to any one of claims 1 to 3; and
the terminal according to claim 12.
20. A wireless communication system comprising:
the base station according to any one of claims 4 to 6; and
the terminal according to claim 13.
21. A transmission/reception method comprising:
a transmission step in which a base station transmits a plurality of signals that is common to each terminal to a terminal located in a coverage area of its own base station by transmitting the plurality of signals at the same timing while frequency multiplexing the plurality of signals on a frequency domain in an area where the signals can be transmitted simultaneously using a beam within the coverage area, and transmitting the plurality of signals a plurality of times area by area while changing the area by changing a direction of the beam; and
a reception step in which the terminal receives the plurality of signals at the same timing by receiving, from the base station, a signal in which the plurality of signals is frequency-multiplexed on the frequency domain.
22. A transmission/reception method comprising:
a transmission step in which a terminal transmits a

plurality of signals at the same timing to a base station while frequency multiplexing the plurality of signals on a frequency domain; and
a reception step in which the base station receives a plurality of signals from a terminal located in a coverage area of its own base station by receiving the plurality of signals at the same timing while frequency multiplexing the plurality of signals on the frequency domain in an area where the signals can be received simultaneously using a beam within the coverage area, and receiving the plurality of signals a plurality of times area by area while changing the area by changing a direction of the beam.