WO2018020727A1

WO2018020727A1 - Communication device, control method and program

Info

Publication number: WO2018020727A1
Application number: PCT/JP2017/009938
Authority: WO
Inventors: 和也森脇; 昌也柴山; 和秀戸田; 恭宏末柄
Original assignee: Kddi株式会社
Priority date: 2016-07-29
Filing date: 2017-03-13
Publication date: 2018-02-01
Also published as: JP2018019364A

Abstract

A communication device transmits and/or receives a second OFDM signal in a wireless communication system in which a first OFDM signal using a cyclic prefix and the second OFDM signal not using the cyclic prefix are transmitted. The communication device acquires information that enables specification of the degree of interference to be received by the first OFDM signal when the second OFDM signal is transmitted, on the basis of the information, determines whether or not to perform control for suppressing the interference to the first OFDM signal when the second OFDM signal is transmitted, and on the basis of the result of the determination, performs control for transmitting or receiving the second OFDM signal.

Description

Communication apparatus, control method, and program

The present invention relates to a communication device, a control method, and a program, and specifically relates to an interference control technique in a wireless communication system.

Currently, as a next-generation mobile radio communication system, a communication system using an orthogonal frequency division multiplexing (OFDM) signal that does not use a cyclic prefix has been proposed (Non-Patent Document 1). On the other hand, at the start of introduction, a next-generation communication method signal may be transmitted on a different frequency channel in the same frequency band as a current-generation communication method signal using an OFDM signal using a cyclic prefix. is assumed. Further, it can be assumed that an OFDM signal using a cyclic prefix and an OFDM signal not using a cyclic prefix coexist in the same frequency band as a signal of the next generation communication method.

In such a case, the receiving apparatus can simultaneously receive the first OFDM signal using the cyclic prefix and the second OFDM signal not using the cyclic prefix. Here, assuming that the receiving apparatus demodulates the first OFDM signal, the receiving apparatus executes a receiving process of removing the cyclic prefix from the first OFDM signal and performing discrete Fourier transform. On the other hand, the receiving apparatus receives the second OFDM signal at the same time as the first OFDM signal, and simultaneously with the reception processing of the first OFDM signal, the first OFDM signal is also received from the second OFDM signal. The reception process is executed. At this time, if a component of the cyclic prefix time interval of the first OFDM signal is removed from the second OFDM signal, the second OFDM signal after the cyclic prefix removal loses orthogonality, and as a result, the first OFDM signal is lost. It can interfere with the OFDM signal.

For this reason, techniques for preventing such interference have been studied. In Non-Patent Document 2, in order to prevent the orthogonality of the second OFDM signal from being lost when the cyclic prefix of the first OFDM signal is removed, the second OFDM signal corresponds to half of the cyclic prefix. There has been proposed a technique for delaying by the amount of time.

The technique for preventing interference from the second OFDM signal to the first OFDM signal as described above essentially prevents interference with the first OFDM signal at the expense of transmission efficiency of the second OFDM signal. It is out. For example, in the technique described in Non-Patent Document 2, since the second OFDM signal is delayed, a signal is not transmitted in the first symbol for a period corresponding to half of the cyclic prefix of the first OFDM signal. Become. Such a no-signal section can be a significant factor of deterioration in frequency utilization efficiency, for example, when a large amount of second OFDM signals having a short time length are transmitted.

On the other hand, it is assumed that the second OFDM signal does not interfere with the first OFDM signal, such as when the second OFDM signal and the first OFDM signal are transmitted in a frequency band sufficiently separated. Even in such a case, if the technique for preventing the interference from the second OFDM signal to the first OFDM signal is applied, only the frequency utilization efficiency is deteriorated.

The present invention reduces the deterioration of frequency utilization efficiency due to the use of interference suppression technology.

According to an aspect of the present invention, there is provided a communication apparatus in which a first orthogonal frequency division multiplexing (OFDM) signal using a cyclic prefix and a second OFDM signal not using a cyclic prefix are transmitted in a wireless communication system. A communication apparatus that performs at least one of transmission and reception of the second OFDM signal, and can specify a degree of interference that the first OFDM signal receives when transmitting the second OFDM signal Acquisition means for acquiring information to be performed, and determination means for determining whether or not to perform control for suppressing interference with the first OFDM signal when transmitting the second OFDM signal based on the information And control means for performing control for transmitting or receiving the second OFDM signal based on the result of determination by the determination means .

The communication apparatus according to another aspect of the present invention is a wireless communication in which a first orthogonal frequency division multiplexing (OFDM) signal using a cyclic prefix and a second OFDM signal not using a cyclic prefix are transmitted. A communication apparatus that transmits the second OFDM signal in the system, and controls whether or not to control interference with the first OFDM signal when transmitting the second OFDM signal from the counterpart apparatus Generating means for acquiring information indicating the above, generating means for generating the second OFDM signal according to the information, with or without performing control for suppressing the interference, and generated by the generating means Transmitting means for transmitting the second OFDM signal to the counterpart device.

According to the present invention, it is possible to reduce deterioration of frequency use efficiency due to use of interference suppression technology.

Other features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings. In the accompanying drawings, the same or similar components are denoted by the same reference numerals.

The accompanying drawings are included in the specification, constitute a part thereof, show an embodiment of the present invention, and are used to explain the principle of the present invention together with the description.
The figure which shows the structural example of a radio | wireless communications system. The figure which shows the hardware structural example of a communication apparatus. The block diagram which shows the function structural example of a communication apparatus. The block diagram which shows the function structural example of the other party apparatus. The figure which shows the example of the flow of the process which a communication apparatus performs. The figure which shows the example of the flow of the process which the other party apparatus performs.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Configuration of wireless communication system)
FIG. 1 is a diagram illustrating a configuration example of a wireless communication system according to the present embodiment. The wireless communication system of FIG. 1 includes, for example, two transmission devices and two reception devices. This is only an example, and there may be three or more transmission devices and only one reception device. In FIG. 1, a first transmitter transmits a first orthogonal frequency division multiplexing (OFDM) signal using a cyclic prefix (CP), and a second transmitter transmits a second OFDM signal that does not use a CP. Shall be sent. Further, the first receiving apparatus is a receiving apparatus that is the destination of the first OFDM signal, and receives the first OFDM signal and the second OFDM signal at the same time. The second receiving apparatus is a receiving apparatus that is the destination of the second OFDM signal. Note that, for example, one of the transmission device and the reception device may be a base station device and the other may be a mobile unit or a fixed terminal device, but both may be terminal devices, and are not limited to these examples. .

Note that the OFDM signal here refers to all signals using carriers orthogonal to each other, and is a concept including DFT-S-OFDM (DFT spread OFDM) and the like.

The first OFDM signal and the second OFDM signal can be transmitted simultaneously by frequency division multiplexing in one of frequency bands such as an 800 MHz band, a 2 GHz band, and a 3 to 4 GHz band, for example. The receiving device collectively receives signals in the same frequency band. For example, since the first receiving apparatus is an apparatus that receives the first OFDM signal, the first receiving apparatus removes the CP by removing the CP in each of one or more symbols included in the first OFDM signal. A discrete Fourier transform (DFT) is performed on the later symbols.

At this time, the first receiving apparatus may simultaneously receive the second OFDM signal in the same frequency band. In this case, since the second OFDM signal is received by being superimposed on the first OFDM signal in the time domain, CP removal, which is processing in the time domain, is also executed for the second OFDM signal. It becomes. That is, the second OFDM signal is subjected to DFT after the signal component in the section corresponding to the CP of the first OFDM signal is removed. Here, when such a signal component is removed from the second OFDM signal, the orthogonality originally secured is lost, and the frequency component of the second OFDM signal leaks into the adjacent frequency band. It may interfere with the first OFDM signal that has been separated on the axis.

Here, for example, when a technique such as Non-Patent Document 2 is used, interference from the second OFDM signal to the first OFDM signal can be reduced. On the other hand, the control for suppressing such interference sacrifices the efficiency of the second OFDM signal as described above, and is constantly executed including the case where such control is unnecessary. Then, the efficiency of the entire system can be degraded. For example, in the first receiving apparatus, when the signal-to-interference and noise power ratio (SINR) and the reference signal received power (RSRP) are sufficiently high and there is no problem with receiving a certain degree of interference, the second OFDM The interference from the signal need not be suppressed. Similarly, when the modulation and coding scheme (MCS) used in the first OFDM signal is excellent in interference resistance, the interference from the second OFDM signal needs to be suppressed as well. There is no. Further, if the resource (frequency block) allocated for transmission of the first OFDM signal is sufficiently separated from the resource allocated for transmission of the second OFDM signal, the second The amount of interference from the OFDM signal is considered to be small originally. In such a case, even if the control for suppressing the interference from the second OFDM signal to the first OFDM signal is executed, the effect is not large, and the disadvantage that the efficiency deteriorates becomes larger. sell.

For this reason, the second transmission apparatus according to the present embodiment executes control for suppressing interference from the second OFDM signal to the first OFDM signal as necessary, and performs such control. If it is not necessary to perform this, this control is not executed. Specifically, the second transmission device or the second reception device acquires information for specifying the degree of interference that the first OFDM signal receives when transmitting the second OFDM signal, and the information Based on the above, it is determined whether or not to execute control for suppressing interference.

Information for identifying the degree of interference experienced by the first OFDM signal when transmitting the second OFDM signal is, for example, SINR, RSRP, assigned MCS, and assigned for the first OFDM signal. It may include at least one of the resources. Note that the acquired information is information related to the first OFDM signal transmitted simultaneously with the second OFDM signal. However, in the communication device in a predetermined area where the second OFDM signal can be received with a predetermined power. All or part of the information may be collected.

The SINR or RSRP of the first OFDM signal is, for example, the SINR or RSRP of the terminal device that receives the first OFDM signal, that is, the SINR or RSRP of the downlink when the second transmission device is a base station device. sell. Similarly, the SINR or RSRP of the first OFDM signal is the SINR or RSRP in the base station apparatus that receives the first OFDM signal when the second transmission apparatus is a terminal apparatus, for example, the uplink SINR or It can be RSRP. However, it is not necessarily limited to these. For example, when downlink signals can interfere with uplink signals, such as when time division duplex (TDD) is used, even if the second transmission apparatus is a base station apparatus, the uplink first SINR or RSRP information on multiple OFDM signals can be acquired. Further, the second transmission device or the second reception device may acquire SINR or RSRP information regarding both the uplink and the downlink.

The first OFDM addressed to the first receiving apparatus when the second OFDM signal can also interfere with the first OFDM signal with respect to the information of the assigned MCS and the assigned resource. It can be information about the signal. That is, for example, when the second transmission device is a base station device (can cause interference in the downlink), the MCS or resource allocated for the signal addressed from the base station device to the terminal device of the first OFDM signal Information can be collected. Similarly, when the second transmission apparatus is a terminal apparatus (which may cause interference in the uplink), information on MCS or resources allocated for a signal addressed from the terminal apparatus of the first OFDM signal to the base station apparatus Can be collected. Note that the second transmission device and the second reception device may acquire MCS and resource information for both uplink and downlink.

Note that information for specifying the degree of interference received by the first OFDM signal when the second OFDM signal is transmitted can be collected from the first transmitting device or the first receiving device. For example, the base station apparatus related to the second OFDM signal can acquire information from the base station apparatus related to the first OFDM signal via the backbone line. In addition, the base station apparatus related to the second OFDM signal can receive information by monitoring the radio signal transmitted from the terminal apparatus related to the first OFDM signal.

When the second transmission apparatus determines whether to perform interference suppression control on the first OFDM signal by the second OFDM signal, the second transmission apparatus follows the result of its own determination. The second OFDM signal can be controlled. On the other hand, when the second receiving apparatus determines whether or not to perform interference suppression control on the first OFDM signal by the second OFDM signal, the second receiving apparatus determines the result of the determination as the second The second transmitting apparatus controls the second OFDM signal according to the notification. For example, in a cellular communication system, a base station apparatus and a terminal apparatus can both be a transmission apparatus and a reception apparatus, but it is generally the base station apparatus that determines whether or not to execute some control. For this reason, when the second OFDM signal can interfere with the first OFDM signal in the downlink, the base station apparatus determines whether to perform interference suppression control of the second OFDM signal. Then, the second OFDM signal transmitted by itself is controlled according to the determination result. On the other hand, if the second OFDM signal can interfere with the first OFDM signal in the uplink, the base station apparatus determines whether to perform interference suppression control for the second OFDM signal. The determination result is notified to the terminal device that transmits the second OFDM signal. Here, the determination result can be individually notified to each of one or more terminal apparatuses with which the base station apparatus communicates, for example, by RRC (Radio Resource Control) signaling. Further, the determination result may be notified all at once to one or more terminal devices with which the base station device communicates by a broadcast signal such as SIB (system information block).

As described above, the second transmitter or the second receiver evaluates in advance the interference that can be given to the first OFDM signal, and the second transmitter can The interference suppression control is performed on the OFDM signal. For this reason, when it is not necessary, the interference suppression control is not performed, so that it is possible to reduce the deterioration of the frequency utilization efficiency due to the use of the interference suppression control. Hereinafter, the configuration of the communication apparatus having the function of the second transmission apparatus or the second reception apparatus and the flow of processing will be described in detail.

(Hardware configuration)
FIG. 2 shows a hardware configuration example of a communication apparatus having the functions of the above-described second transmission apparatus or second reception apparatus. For example, the communication device has a hardware configuration as shown in FIG. 2, and includes, for example, a CPU 201, a ROM 202, a RAM 203, an external storage device 204, and a communication circuit 205. Although an example of the hardware configuration of the communication apparatus will be described below, the communication partner apparatus can also have the same hardware configuration. In the communication device, for example, the CPU 201 executes a program that realizes each function of the second transmission device or the second reception device described above, which is recorded in any of the ROM 202, the RAM 203, and the external storage device 204. Here, the CPU 201 is an example of a processor, and may be replaced by another processor such as an ASIC (application-specific integrated circuit), or may be replaced by a reconfigurable processor such as an FPGA (field programmable gate array). Also good.

And a communication apparatus controls the communication circuit 205 by CPU201, for example, and communicates with another apparatus. Note that the communication circuit 205 can perform at least one of transmission and reception of an OFDM signal that does not use a CP. In some cases, the communication circuit 205 transmits and receives an OFDM signal that uses a CP and signals of other wireless communication systems. It may be configured to perform at least one of. Further, the communication circuit 205 may be able to transmit and receive signals not only in one frequency band but also in a plurality of frequency bands. For example, both a cellular communication system and a wireless LAN communication system may be used. . Furthermore, the communication circuit 205 may be configured to perform wired communication. In the configuration of FIG. 2, the communication apparatus is schematically illustrated as having one communication circuit 205, but is not limited thereto. For example, the communication device may include a first communication circuit for cellular communication and a second communication circuit for wireless LAN communication. In addition, when the communication device itself is a base station device, for example, in addition to a communication circuit for wireless communication with the terminal device, the communication device performs wired communication or wireless communication for communication with other base station devices. A communication circuit may be included.

Note that the communication device may include dedicated hardware for executing each function, or may execute other portions by a computer that executes a part of the hardware and operates the program. All functions of the communication device may be executed by a computer and a program.

(Functional configuration)
FIG. 3 is a diagram illustrating a functional configuration example of the communication apparatus according to the present embodiment. In one example, the communication apparatus includes a transmission unit 301, a reception unit 302, an information acquisition unit 303, a determination unit 304, a signal generation unit 305, and a determination result notification unit 306. Note that the communication device may have functions (not shown) such as various functions of information processing equipment including the communication device, for example, and at least a function of either a base station device or a terminal device in the cellular communication system. Shall have.

When the communication device is the second transmission device, the transmission unit 301 transmits the above-described second OFDM signal generated by the signal generation unit 305 described later. In addition, when the communication device is the second receiving device, the transmission unit 301 notifies the terminal device of the determination result by the determination unit 304 described later through the determination result notification unit 306 described later. Furthermore, the transmission unit 301 can transmit information acquired by the communication device, a control signal, and the like to another device connected by wire, for example. The transmission unit 301 includes, for example, an antenna, a circuit used for outputting a radio signal via the antenna, and a circuit for wired communication as necessary.

When the communication device is the second receiving device, the receiving unit 302 receives the second OFDM signal transmitted by the counterpart device. The receiving unit 302 can receive a wireless signal or a wired signal transmitted from another device. The receiving unit 302 includes, for example, an antenna, a circuit for processing a wireless signal received via the antenna and extracting data, and a circuit for wired communication as necessary. Note that the transmission unit 301 and the reception unit 302 can share one or more antennas and circuits.

The information acquisition unit 303 acquires information for specifying the degree of interference received by the first OFDM signal when the second OFDM signal is transmitted, for example, via the reception unit 302. This information includes, for example, at least one of SINR, RSRP, allocated MCS, and allocated resource for the first OFDM signal as described above. The acquired information is input to the determination unit 304.

The determination unit 304 determines whether or not to execute control for suppressing interference by the second OFDM to the first OFDM signal, based on the information input from the information acquisition unit 303.

For example, it is considered that the SINR and RSRP of the first OFDM signal are sufficiently high, and even if interference from the second OFDM signal is received, the influence on the first OFDM signal is small. For this reason, for example, when the SINR or RSRP of the first OFDM signal is equal to or greater than a predetermined value, the determination unit 304 determines not to perform control for suppressing interference due to the second OFDM. On the other hand, for example, when the SINR or RSRP of the first OFDM signal is less than a corresponding predetermined value, the determination unit 304 determines to perform control for suppressing interference due to the second OFDM.

In addition, when MCS having high interference resistance is assigned to the first OFDM signal, the influence on the data extraction of the first OFDM signal can be suppressed to a low level even if interference from the second OFDM signal is received. it can. Also, for example, when the SINR acquired from the information acquisition unit 303 is sufficiently larger than the SINR required for demodulation / decoding in the allocated MCS, the first OFDM signal is derived from the second OFDM signal. Even if it receives interference, it can demodulate / decode without error. For this reason, the determination unit 304, for example, when an MCS with high interference resistance is assigned or when the difference (margin) between the actual SINR and the SINR required by the MCS is equal to or greater than a predetermined value, It is determined not to execute control for suppressing interference by the second OFDM. On the other hand, the determination unit 304 determines to perform control for suppressing interference by the second OFDM when an MCS with low interference resistance is assigned or when the above-described margin is less than a predetermined value.

Furthermore, when the resource (frequency block) allocated to the first OFDM signal is sufficiently separated from the resource allocated to the second OFDM signal, interference from the second OFDM signal to the first OFDM signal Is considered to be sufficiently small. Therefore, for example, when the distance in the frequency domain between the resource allocated to the first OFDM signal and the resource allocated to the second OFDM signal is equal to or greater than a predetermined value, the determination unit 304 determines the second OFDM signal. It is determined not to execute the control to suppress the interference due to. For example, when the distance in the frequency domain between the resource allocated to the first OFDM signal and the resource allocated to the second OFDM signal is less than a predetermined value, the determination unit 304 uses the second OFDM signal. It is determined to execute control for suppressing interference. Note that the determination unit 304 switches to the first OFDM signal based on the second OFDM signal according to the distance in the frequency domain between the resource allocated to the first OFDM signal and the resource allocated to the second OFDM signal. The amount of interference may be evaluated. In this case, when the interference amount of the evaluation result is equal to or less than the allowable amount of the first OFDM signal, the determination unit 304 does not execute control for suppressing interference due to the second OFDM signal, and the interference amount of the evaluation result is the allowable amount. In the above case, it is determined to execute control for suppressing interference by the second OFDM.

The result of determination by the determination unit 304 is input to the signal generation unit 305 or the determination result notification unit 306. Specifically, when the communication device is the second transmission device, the determination result is input to the signal generation unit 305, and when the communication device is the second reception device, the determination result is notified of the determination result. Input to the unit 306. When the communication device is the second transmission device and the second reception device, the result of determination by the determination unit 304 is input to both the signal generation unit 305 and the determination result notification unit 306.

When it is determined that the control for suppressing the interference by the second OFDM is to be executed, the signal generation unit 305 generates the second OFDM signal by executing the interference suppression control, and transmits the second OFDM signal through the transmission unit 301. Transmit to the device (second receiving device). On the other hand, if it is determined that the control for suppressing interference by the second OFDM is not to be executed, the signal generation unit 305 generates the second OFDM signal without executing the interference suppression control, and transmits the transmission unit 301. To the other device (second receiving device).

The determination result notification unit 306 notifies the partner device (second transmission device) of the determination result by the determination unit 304 via the transmission unit 301. At this time, the determination result notifying unit 306 is the partner device only when the determination result of the determining unit 304 is changed, that is, when the state is changed from the state where the interference suppression control is executed to the state where the interference suppression control is not executed or vice versa. Notification of information may be performed. Further, the determination result notifying unit 306 can notify information to a plurality of second transmission devices individually using, for example, RRC signaling or simultaneously using a broadcast signal such as SIB. By performing notification individually, each of the plurality of second transmission devices can execute separate control, which is particularly effective when the situation of each of the plurality of second transmission devices is greatly different. sell. On the other hand, since the same control can be performed by a plurality of second transmission apparatuses by performing notification by broadcast, it can be particularly effective when the situation of the plurality of second transmission apparatuses is the same.

Note that FIG. 4 shows a configuration example of the counterpart apparatus, that is, the second transmission apparatus, to which the determination result notification section 306 has notified the determination result by the determination section 304. The partner apparatus includes a transmission unit 401, a reception unit 402, a determination result acquisition unit 403, and a signal generation unit 404. The transmission unit 401 can transmit the second OFDM signal wirelessly, and the reception unit 402 can receive the signal wirelessly. The transmission unit 401 and the reception unit 402 include, for example, a common or separate wireless communication circuit and an antenna. The determination result acquisition unit 403 acquires the determination result transmitted from the communication apparatus by the determination unit 304. Then, similarly to the signal generation unit 305 described above, the signal generation unit 404 generates a second OFDM signal with or without performing interference suppression control according to the determination result by the determination unit 304. The second OFDM signal generated by the signal generation unit 404 is transmitted to the communication device via the transmission unit 401.

(Process flow)
Next, the flow of processing executed by the communication apparatus and the counterpart apparatus when the communication apparatus is the second reception apparatus will be described with reference to FIGS. 5 and 6.

First, the communication device specifies the degree of interference that the first OFDM signal receives when transmitting the second OFDM signal, for example, by receiving information from another device that transmits or receives the first OFDM signal. To obtain information (S501). Then, based on the information, the communication apparatus determines whether or not to perform control for suppressing interference from the second OFDM signal to the first OFDM signal (S502). Thereafter, when the communication apparatus itself is the second transmission apparatus, the communication apparatus generates the second OFDM signal without performing the interference suppression control according to the determination result of S502, and generates the second OFDM signal. The transmitted signal is transmitted to the second receiving device (S503). If the communication device itself is the second reception device, the communication device notifies the second transmission device of the determination result of S502 (S504). Note that the communication apparatus repeatedly executes the process of FIG. That is, the state of the transmitter or receiver of the first OFDM signal is continuously monitored, it is continuously determined whether to perform interference suppression control, and signal generation and transmission are determined based on the latest determination result. Notify the result.

When the communication device is the second receiving device, the partner device (second transmitting device) receives the notification transmitted by the communication device in S504 (S601), and based on the notification, performs the same as S503. A second OFDM signal is generated and transmitted (S602). Note that the counterpart device (second transmitting device) when the communication device is the second receiving device repeatedly executes the process of FIG.

As described above, it is possible to prevent unnecessary interference suppression control from being executed, and as a result, it is possible to reduce deterioration in frequency utilization efficiency due to the use of interference suppression technology.

The present invention is not limited to the above embodiment, and various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, in order to make the scope of the present invention public, the following claims are attached.

This application claims priority based on Japanese Patent Application No. 2016-150446 filed on July 29, 2016, the entire contents of which are incorporated herein by reference.

Claims

At least transmission and reception of the second OFDM signal in a wireless communication system in which a first orthogonal frequency division multiplexing (OFDM) signal using a cyclic prefix and a second OFDM signal not using a cyclic prefix are transmitted. A communication device that performs one of the following:
Obtaining means for obtaining information that enables to specify a degree of interference received by the first OFDM signal when transmitting the second OFDM signal;
Determining means for determining whether or not to perform control for suppressing interference with the first OFDM signal when transmitting the second OFDM signal based on the information;
Control means for performing control for transmitting or receiving the second OFDM signal based on a result of determination by the determination means;
A communication apparatus comprising:
The control means notifies the partner apparatus that transmits the second OFDM signal of the determination result by the determination means, for receiving the second OFDM signal.
The communication apparatus according to claim 1.
The control unit determines the determination when the determination unit determines not to perform control to suppress the interference while performing control to suppress the interference, or while not performing control to suppress the interference. When the means decides to perform control to suppress the interference, the result of the decision by the decision means is notified to the counterpart device,
The communication device according to claim 2.
The control means notifies the determination result by the determination means individually to one or more counterpart devices.
The communication apparatus according to claim 2 or 3, wherein
The control means notifies the determination result by the determination means to one or more counterpart devices all at once.
The communication apparatus according to claim 2 or 3, wherein
The information includes at least one of a signal-to-interference and noise power ratio, a reference signal received power, a modulation and coding scheme, and an allocation resource for the first OFDM signal.
The communication apparatus according to any one of claims 1 to 5, wherein:
The acquisition means acquires the information from another device that performs at least one of transmission and reception of the first OFDM signal.
The communication apparatus according to claim 1, wherein
The communication device is a base station device that communicates with a terminal device.
The communication device according to claim 1, wherein the communication device is a device.
A communication apparatus that transmits the second OFDM signal in a wireless communication system in which a first orthogonal frequency division multiplexing (OFDM) signal that uses a cyclic prefix and a second OFDM signal that does not use a cyclic prefix are transmitted. And
Obtaining means for obtaining information indicating whether or not to perform control for suppressing interference with the first OFDM signal when transmitting the second OFDM signal from a counterpart device;
Generating means for generating the second OFDM signal with or without performing control to suppress the interference according to the information;
Transmitting means for transmitting the second OFDM signal generated by the generating means to the counterpart device;
A communication apparatus comprising:
The communication device is a terminal device that communicates with a base station device.
The communication apparatus according to claim 9.
At least transmission and reception of the second OFDM signal in a wireless communication system in which a first orthogonal frequency division multiplexing (OFDM) signal using a cyclic prefix and a second OFDM signal not using a cyclic prefix are transmitted. A communication device control method for performing any of the following:
An acquisition step of acquiring information that enables specifying a degree of interference received by the first OFDM signal when transmitting the second OFDM signal;
A determination step of determining whether to perform control for suppressing interference with the first OFDM signal when transmitting the second OFDM signal based on the information;
A control step of performing control for transmitting or receiving the second OFDM signal based on a result of the determination in the determination step;
A control method characterized by comprising:
Control of a communication apparatus for transmitting the second OFDM signal in a wireless communication system in which a first orthogonal frequency division multiplexing (OFDM) signal using a cyclic prefix and a second OFDM signal not using a cyclic prefix are transmitted A method,
An acquisition step of acquiring information indicating whether or not to perform control for suppressing interference with the first OFDM signal when transmitting the second OFDM signal from the counterpart device;
Generating the second OFDM signal according to the information, with or without performing control to suppress the interference;
A transmission step of transmitting the second OFDM signal generated in the generation step to the counterpart device;
A control method characterized by comprising:
At least transmission and reception of the second OFDM signal in a wireless communication system in which a first orthogonal frequency division multiplexing (OFDM) signal using a cyclic prefix and a second OFDM signal not using a cyclic prefix are transmitted. In a computer equipped with a communication device that performs either
An acquisition step of acquiring information that enables specifying a degree of interference received by the first OFDM signal when transmitting the second OFDM signal;
A determination step of determining whether to perform control for suppressing interference with the first OFDM signal when transmitting the second OFDM signal based on the information;
A control step of performing control for transmitting or receiving the second OFDM signal based on a result of the determination in the determination step;
A program for running
Provided in a communication apparatus for transmitting the second OFDM signal in a wireless communication system in which a first orthogonal frequency division multiplexing (OFDM) signal using a cyclic prefix and a second OFDM signal not using a cyclic prefix are transmitted Computer
An acquisition step of acquiring information indicating whether or not to perform control for suppressing interference with the first OFDM signal when transmitting the second OFDM signal from the counterpart device;
Generating the second OFDM signal according to the information, with or without performing control to suppress the interference;
A transmission step of transmitting the second OFDM signal generated in the generation step to the counterpart device;
A program for running