CROSS REFERENCE TO RELATED APPLICATIONS

This application is a U.S. National Phase of International Patent Application No. PCT/JP2018/044323 filed on Nov. 30, 2018, which claims priority benefit of Japanese Patent Application No. JP 2018-005230 filed in the Japan Patent Office on Jan. 16, 2018. Each of the above-referenced applications is hereby incorporated herein by reference in its entirety.

TECHNICAL FIELD

The technology disclosed herein relates to a communication apparatus that is operated under a wireless communication environment to which a full duplex communication scheme is applied and a communication method.

BACKGROUND ART

Due to the rapid increase in mobile data traffic in recent years, study on innovative technologies for enhancing the use efficiency of radio resources is actively carried out. A representative one of these technologies is full duplex (FD) communication. For example, a technology for implementing, at a communication apparatus (mainly, a relay station), FD of an access link (between the relay station and terminals) and a backhaul link (between a base station and the relay station) is disclosed (see PTL 1, for example).

In conventional FD, communication in which a transmission band and a reception band use different frequencies is commonly carried out in order to avoid crosstalk between a transmission signal and a reception signal. Conventional FD (which uses different frequencies) is also called “FD FDD (Frequency Division DUplex).” Meanwhile, in Band full duplex (IB FD) is a duplex scheme in which transmission and reception are concurrently performed by using the same band. IB FD can enhance the frequency use efficiency to be up to twice that of conventional FD FDD (i.e., FDD in which a transmission band and a reception band use different frequencies).

IB FD has a problem that a signal transmitted from a communication apparatus may be leaked to a reception circuit of the communication apparatus so that significantly strong self-interference is generated. Recently, such self-interference can be mitigated as a result of the advancement of interference cancelling technology. Consequently, carrying out IB FD is becoming possible.

CITATION LIST

Patent Literature

[PTL 1]

WO2015/098228

SUMMARY

Technical Problem

An object of the technology disclosed herein is to provide a communication apparatus that is operated under a wireless communication environment to which a full duplex communication scheme is applied and a communication method.

Solution to Problem

A first aspect of the technology disclosed herein is a communication apparatus including

a communication section that performs wireless communication, and

a control section that controls operation of the communication section and processing of a signal transmitted and received by the communication section, in which

upon receiving, through a downlink control channel from a base station, designation regarding a resource in which interference is to be measured, the control section conducts, in the designated resource, measurement of interference from another terminal.

The control section conducts measurement of interference in a downlink resource that is semi-statically designated as a downlink but is dynamically designated as an uplink while any resource with which full duplex communication is to be carried out is not dynamically designated. Alternatively, the control section conducts measurement of interference in a downlink resource that is semi-statically designated as an uplink but is dynamically designated as an uplink while any resource with which full duplex communication is to be carried out is not dynamically designated. In addition, the control section further controls transmission of interference information obtained by the measurement to the base station.

Further, a second aspect of the technology disclosed herein is a communication apparatus including

a communication section that performs wireless communication, and

a control section that controls operation of the communication section and processing of a signal transmitted and received by the communication section, in which

upon receiving, through a downlink control channel from a base station, designation regarding a resource in which interference is to be measured, the control section conducts, in the designated resource, transmission of a test signal for interference measurement.

The control section conducts transmission of a test signal for interference measurement in a downlink resource that is semi-statically designated as a downlink but is dynamically designated as an uplink while any resource with which full duplex communication is to be carried out is not dynamically designated. Alternatively, the control section conducts transmission of a test signal for interference measurement in a downlink resource that is semi-statically designated as an uplink but is dynamically designated as an uplink while any resource with which full duplex communication is to be carried out is not dynamically designated.

Further, a third aspect of the technology disclosed herein is a communication apparatus including

a communication section that performs wireless communication, and

a control section that controls operation of the communication section and processing of a signal transmitted and received by the communication section, in which

the control section makes, through a downlink control channel, designation regarding a resource in which interference is to be measured, for a downlink terminal that is slated to transmit a downlink signal.

In addition, the control section makes, through a downlink control channel, designation regarding a resource in which a test signal for interference measurement is to be transmitted, for an uplink terminal that is slated to transmit an uplink signal. Further, the control section decides, on the basis of interference measurement result obtained by a downlink terminal, a combination of a downlink terminal to be set as a transmission destination of a downlink signal and an uplink terminal to transmit an uplink signal in the resource for which the instruction for interference measurement has been given through the downlink control channel.

Moreover, a fourth aspect of the technology disclosed herein is a communication method including

a step of receiving, through a downlink control channel from a base station, designation regarding a resource in which interference is to be measured, and

a step of conducting measurement of interference from another terminal in the designated resource.

Further, a fifth aspect of the technology disclosed herein is a communication method including

a step of receiving, through a downlink control channel from a base station, designation regarding a resource in which interference is to be measured, and

a step of transmitting a test signal for interference measurement from another terminal in the designated resource.

Furthermore, a sixth aspect of the technology disclosed herein is a communication method including

a step of transmitting, through a downlink control channel to a downlink terminal that is slated to transmit a downlink signal, designation regarding a resource in which interference is to be measured,

a step of transmitting, through the downlink control channel to an uplink terminal that is slated to transmit an uplink signal, designation regarding a resource in which a test signal for interference measurement is to be transmitted, and

a step of deciding, on the basis of an interference measurement result obtained by the downlink terminal, a combination of a downlink terminal to be set as a transmission destination of a downlink signal and an uplink terminal to transmit an uplink signal in the resource for which an instruction for measurement interference has been given through the downlink control channel.

Advantageous Effects of Invention

The technology disclosed herein can provide a communication apparatus and communication method for conducting inter-terminal interference measurement for terminal pairing to carry out in-band full duplex communication and a communication apparatus and a communication method for giving an instruction for performance of inter-terminal interference measurement.

It is to be noted that the effects described in the present description are just examples, and effects of the present invention are not limited thereto. In addition, the present invention may provide any additional effects besides the aforementioned effects.

Other objects, features, and advantages of the technology disclosed herein will become apparent from the detailed description based on the embodiment and the attached drawings which are described below.

