WO2016013299A1 - Device - Google Patents

Abstract

[Problem] To enable radio resources to be more flexibly allocated to a terminal device that performs radio communication by HD-FDD. [Solution] Provided is a device provided with an acquisition unit which acquires information indicating a subframe configuration that defines uplink subframes and downlink subframes for radio communication by HD-FDD, and a control unit which notifies a terminal device of the subframe configuration.

Description

apparatus

This disclosure relates to an apparatus.

LTE (Long Term Evolution) supports Frequency Division Duplex (FDD) and Time Division Duplex (TDD) as duplex systems. Furthermore, LTE supports both full duplex (FD) and half duplex (HD) for FDD. That is, LTE supports both FD-FDD and HD-FDD. When the terminal device has an FD function, both transmission and reception can be performed simultaneously. On the other hand, when the terminal device has only the HD function, transmission and reception are not performed simultaneously. HD-FDD reduces the data rate of the terminal device, but can reduce the cost of the terminal device. For example, a terminal device that supports only HD-FDD may not have a duplexer and does not require a plurality of local transmitters (ie, only one local transmitter is required). In addition, a terminal device that performs an HD-FDD operation has a smaller amount of signal processing than a terminal device that performs an FD-FDD operation.

For example, the base station performs the HD-FDD operation by performing scheduling so that both the uplink radio resource and the downlink radio resource are not simultaneously allocated to the terminal device that performs the HD-FDD operation. Several other technologies have been proposed for HD-FDD.

For example, Non-Patent Documents 1 and 2 propose the number of HARQ (Hybrid ARQ (Automatic repeat-request)) processes necessary for a terminal device that performs an HD-FDD operation. Specifically, under the existing assumption of FDD, transmission / reception of uplink scheduling information 4 subframes before transmission / reception of uplink data and transmission / reception of ACK / NACK 4 subframes after transmission / reception of data It is proposed that the maximum number of HARQ processes for each of the uplink and the downlink is 3.

3GPP TSG RAN WG1 Meeting # 76bis, Shenzhen, China, 31st March-4th April 2014, CATT, “Number of HARQ processes for low complexity HD-FDD UEs” 3GPP TSG RAN WG1 Meeting # 76bis, Shenzhen, P.R.China, 31st March-4th April 2014, Ericsson, “Half duplex FDD for low cost MTC UE”

According to the technique disclosed in the non-patent document described above, for example, three subframes out of eight subframes are allocated to the downlink, and the other three out of the eight subframes. Subframes are assigned to the uplink. Such allocation of subframes to the downlink / uplink may actually be realized by allocation of radio resources (eg, resource blocks) by the scheduler of the base station. Also, a subframe between the three subframes (downlink) and the other three subframes (uplink) is reserved for transmission / reception switching, and the radio resources of the subframe are: It is not assigned to the terminal device that performs the switching.

However, when downlink subframes and uplink subframes are fixed in this way, it is difficult to flexibly allocate radio resources to terminal devices that perform HD-FDD operations, for example, according to traffic. Can be.

Therefore, it is desirable to provide a mechanism that allows radio resources to be more flexibly allocated to terminal devices that perform radio communication using HD-FDD.

According to the present disclosure, an acquisition unit that acquires information indicating a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication using HD-FDD, and notifies the terminal device of the subframe configuration. And a control unit.

Further, according to the present disclosure, a subframe configuration for determining an uplink subframe and a downlink subframe for wireless communication in HD-FDD, the subframe configuration being notified by the base station to the terminal device, is shown. An apparatus is provided that includes an acquisition unit that acquires information and a control unit that controls HD-FDD wireless communication with the base station by the terminal device according to the subframe configuration.

As described above, according to the present disclosure, it is possible to more flexibly allocate radio resources to terminal devices that perform radio communication using HD-FDD. The above effects are not necessarily limited, and any of the effects shown in the present specification or other effects that can be grasped from the present specification are exhibited together with or in place of the above effects. May be.

It is explanatory drawing for demonstrating an example of the radio | wireless communication in FDD. It is explanatory drawing for demonstrating an example of the radio | wireless communication in TDD. It is explanatory drawing for demonstrating an example of the radio | wireless communication in HD-FDD. 10 is a flowchart showing an example of a schematic flow of an HD-FDD operation from cell search to transmission of capability information. It is explanatory drawing for demonstrating the position of PSS and SSS in FDD. 5 is a flowchart illustrating an example of a schematic flow of wireless communication processing in HD-FDD. It is explanatory drawing for demonstrating UL / DL configuration of TDD. It is explanatory drawing for demonstrating the example of the sub-frame by which downlink data are transmitted, and the sub-frame by which the ACK / NACK about the said downlink data is transmitted. It is explanatory drawing for demonstrating the example of the sub-frame by which uplink data is transmitted, and the sub-frame by which the ACK / NACK about the said uplink data is transmitted. It is explanatory drawing for demonstrating the example of transmission of ACK / NACK in the case of a carrier aggregation. 2 is an explanatory diagram illustrating an example of a schematic configuration of a communication system according to an embodiment of the present disclosure. FIG. It is explanatory drawing for demonstrating the example of the radio | wireless communication in HD-FDD according to UL / DL configuration of TDD. It is explanatory drawing for demonstrating the example of the radio | wireless communication in HD-FDD according to the other configuration different from UL / DL configuration of TDD. It is a block diagram which shows an example of a structure of the base station which concerns on the same embodiment. It is explanatory drawing for demonstrating the 1st example of the sub-frame for ACK / NACK transmission suitable for a sub-frame structure. It is explanatory drawing for demonstrating the 2nd example of the sub-frame for ACK / NACK transmission suitable for a sub-frame structure. It is explanatory drawing for demonstrating the 3rd example of the sub-frame for ACK / NACK transmission suitable for a sub-frame structure. It is explanatory drawing for demonstrating the 4th example of the sub-frame for ACK / NACK transmission suitable for a sub-frame structure. It is explanatory drawing for demonstrating the example of the notification of the allocation to the terminal device of the radio | wireless resource of an uplink sub-frame. It is a block diagram which shows an example of a structure of the terminal device which concerns on the same embodiment. 4 is an explanatory diagram for describing an example of hardware included in a wireless communication unit of the terminal device according to the embodiment; FIG. It is a flowchart which shows an example of the schematic flow of a process of the base station which concerns on the same embodiment. It is a flowchart which shows an example of the schematic flow of the 1st process of the terminal device which concerns on the embodiment. It is a flowchart which shows an example of the schematic flow of the 2nd process of the terminal device which concerns on the embodiment. It is explanatory drawing for demonstrating the 1st example of transmission of ACK / NACK which concerns on the modification of the embodiment. It is explanatory drawing for demonstrating the 2nd example of transmission of ACK / NACK which concerns on the modification of the embodiment. It is explanatory drawing for demonstrating the 1st example of a primary cell and a secondary cell. It is explanatory drawing for demonstrating the example of the macro cell and small cell in a 2nd modification. It is explanatory drawing for demonstrating the 2nd example of a primary cell and a secondary cell. It is explanatory drawing for demonstrating the example of the macro cell and small cell in a 4th modification. It is a block diagram which shows the 1st example of schematic structure of eNB. It is a block diagram which shows the 2nd example of schematic structure of eNB. It is a block diagram which shows an example of a schematic structure of a smart phone. It is a block diagram which shows an example of a schematic structure of a car navigation apparatus.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

The description will be made in the following order.
1. 1. Introduction 1.1. Related technology 1.3. Technical issues 2. Schematic configuration of communication system 3. Subframe configuration Configuration of each device 4.1. Configuration of base station 4.2. 4. Configuration of terminal device Flow of processing Modification 6.1. Features common to the modified examples 6.2. First modification 6.3. Second modification 6.4. Third modification 6.5. Fourth modification 6.6. Fifth modification example 7. Application example 7.1. Application examples related to base stations 7.2. 7. Application examples related to terminal devices Summary

<< 1. Introduction >>
First, with reference to FIGS. 1 to 10, related technologies and technical problems of the embodiments of the present disclosure will be described.

<1.1. Related Technology>
A related technique of the embodiment of the present disclosure will be described with reference to FIGS.

(FDD / TDD)
LTE supports frequency division duplex (FDD) and time division duplex (TDD) as duplex schemes. Hereinafter, an example of FDD wireless communication and TDD wireless communication will be described with reference to FIGS. 1 and 2.

FIG. 1 is an explanatory diagram for explaining an example of wireless communication in FDD. Referring to FIG. 1, a pair of FDD uplink band F (UL) and downlink band F (DL) is shown. In FDD wireless communication, the uplink band F (UL) is used for the uplink at any time, and the downlink band F (DL) is used for the downlink at any time.

FIG. 2 is an explanatory diagram for explaining an example of wireless communication in TDD. Referring to FIG. 2, a band F of TDD is shown. In TDD wireless communication, band F is used for the uplink at one time and for the downlink at another time.

(FD / HD)
LTE supports both full duplex (FD) and half duplex (HD) for FDD. That is, LTE supports both FD-FDD and HD-FDD.

When the terminal device has an FD function, both transmission and reception can be performed simultaneously. Referring to FIG. 1 again, for example, a terminal device that performs FD-FDD operation performs both uplink transmission in the uplink band F (UL) and downlink reception in the downlink band F (DL). Can be done simultaneously.

On the other hand, when the terminal device has only the HD function, transmission and reception are not performed simultaneously. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 3 is an explanatory diagram for explaining an example of wireless communication in HD-FDD. Referring to FIG. 3, a pair of FDD uplink band F (UL) and downlink band F (DL) is shown. The terminal device that performs the HD-FDD operation does not perform both uplink transmission in the uplink band F (UL) and downlink reception in the downlink band F (DL) at the same time. That is, the terminal apparatus performs the uplink transmission at a certain time and performs the downlink reception at another time.

HD-FDD reduces the data rate of the terminal device, but can reduce the cost of the terminal device. For example, a terminal device that supports only HD-FDD may not have a duplexer and does not require a plurality of local transmitters (ie, only one local transmitter is required). In addition, a terminal device that performs an HD-FDD operation has a smaller amount of signal processing than a terminal device that performs an FD-FDD operation.

(Capability)
In LTE, a UE (User Equipment) transmits a UE capability information message (UE Capability Information message) indicating a terminal category and various capabilities supported by the UE to an eNB (evolved Node B).

For example, in the Supported Band List, the numbers of FDD and TDD operating bands supported by the UE are shown. Further, regarding the operating band, the UE supports only HD or the UE supports FD. Is shown.

For example, in the support band combination (Support Band Combinations), a combination of bands that support carrier aggregation is shown for each of the downlink and the uplink.

(HD-FDD operation)
—Operation from Cell Search to Transmission of Capability Information FIG. 4 is a flowchart showing an example of a schematic flow of HD-FDD operation from cell search to transmission of capability information.

UE retains in advance a list of frequencies that are subject to cell search. Therefore, the UE receives a downlink signal according to the list, and detects a synchronization signal included in the received downlink signal (S71). The synchronization signals are PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal). Based on the synchronization signal, the UE acquires downlink synchronization and acquires a cell ID (S72).

Furthermore, the UE receives system information (S73). The system information is MIB (Master Information Block) and SIB (System Information Block). The UE acquires a random access parameter from the system information (S74).

Then, the UE performs a random access procedure (S75).

Furthermore, the UE transmits capability information indicating the capability of the UE to the eNB in response to a request from the eNB (S76). For example, the capability information is a UE capability information message. The UE notifies the eNB whether the UE supports only HD or the UE supports FD by transmitting the capability information. Then, the process ends.

When the terminal device supports only HD for the operating band used by the base station, the base station uses both the uplink radio resource and the downlink radio resource of the same subframe as the terminal device. Scheduling is performed so as not to be assigned to

In step S71 described above, the radio resource used for transmitting the synchronization signal is determined in advance. Therefore, the UE can recognize the timing of the head of the radio frame by specifying the positions of the PSS and SSS (that is, radio resources used for transmission of the PSS and SSS).

FIG. 5 is an explanatory diagram for explaining the positions of the PSS and the SSS in the FDD. Referring to FIG. 5, a 10 ms radio frame and 10 subframes included in the radio frame are shown. Each subframe includes two slots (ie, a first slot and a second slot), and each slot includes seven symbols. For example, in FDD, in the first slot of a subframe whose subframe number is 0, SSS is transmitted with the sixth symbol and PSS is transmitted with the seventh symbol. Also in the first slot of the subframe whose subframe number is 5, SSS is transmitted with the sixth symbol and PSS is transmitted with the seventh symbol.

-Wireless Communication with HD-FDD FIG. 6 is a flowchart illustrating an example of a schematic flow of wireless communication processing with HD-FDD.

UE receives the downlink signal (S81). The said downlink signal contains the signal of the downlink control information transmitted by PDCCH (Physical Downlink Control Channel).

When there is uplink scheduling information for the UE in the downlink control information (S82: YES), the UE stores the uplink scheduling information (S83).

If there is downlink scheduling information for the UE in the downlink control information (S84: YES), the UE performs a process of receiving downlink data addressed to the UE (S85).

When uplink scheduling information is transmitted in the previous three subframes (S86: YES), the UE sets an uplink frequency (S87). In addition, when the uplink frequency is already set, the UE does not need to set the uplink frequency again. Then, the next subframe arrives (S88), and the UE transmits uplink data (S89). Then, the process returns to step S86.

On the other hand, when the uplink scheduling information is not transmitted in the previous three subframes (S86: NO), the UE sets the downlink frequency (S90). Then, the next subframe is targeted (S91), and the process returns to step S81.

(HARQ)
(A) Difference between FDD and TDD In FDD, a HARQ response (HARQ Acknowledgment) for downlink data is transmitted in the uplink in a subframe four times after the subframe in which the downlink data is transmitted. Also, the HARQ response for the uplink data is transmitted in the downlink in a subframe four times after the subframe in which the uplink data is transmitted.

In TDD, the subframe in which the HARQ response is transmitted differs depending on the TDD uplink / downlink configuration (hereinafter referred to as “UL / DL configuration”). The subframe is predetermined for UL / DL configuration of TDD. The subframe in which ACK / NACK for downlink data is transmitted is defined in Table 10.1.3.3.1-1 of 3GPP TS36.213. A subframe in which ACK / NACK for uplink data is transmitted is defined in Table 9.1.2-1 of 3GPP TS36.213.

(B) Case of Carrier Aggregation In carrier aggregation, the uplink control information of the secondary component carrier (SCC) (ie secondary cell) of the UE is changed to the primary component carrier (ie primary component carrier) (ie primary component carrier) of the UE. Cell) PUCCH (Physical Uplink Control Channel). Therefore, no PUCCH is arranged in the SCC.

The above uplink control information includes a HARQ response. That is, ACK / NACK for downlink transmitted by SCC is transmitted by PUCCH of PCC.

The uplink control information includes a scheduling request and / or channel state information (CSI).

(Uplink scheduling information transmission)
In FDD, uplink scheduling information is transmitted to the UE in four subframes before the subframe in which the radio resource allocated to the UE is located.

In TDD, the subframe in which uplink scheduling information is transmitted differs depending on the UL / DL configuration of TDD. The subframe is predetermined for UL / DL configuration of TDD. The subframe in which uplink scheduling information is transmitted is defined in Table 8-2 of 3GPP TS36.213.

(UL / DL configuration of TDD)
Seven configurations are defined as TDD uplink / downlink configurations (ie, UL / DL configurations). The seven configurations will be described below with reference to FIG.

FIG. 7 is an explanatory diagram for explaining the UL / DL configuration of TDD. Referring to FIG. 7, seven UL / DL configurations (configurations 0-6) are shown. Each UL / DL configuration defines an uplink subframe and a downlink subframe among 10 subframes included in a radio frame. Further, each UL / DL configuration defines a special subframe among the ten subframes. Specifically, subframes with subframe numbers 0 and 5 are fixed to downlink subframes for transmission of synchronization signals by the eNB. A subframe with a subframe number of 2 is fixed to an uplink subframe. Therefore, in any configuration, the subframe whose subframe number is 1 is a special subframe.

The special subframe includes DwPTS (Downlink Pilot Time Slot) in the downlink part, UpPTS (Uplink Pilot Time Slot) in the uplink part, and GP (Guard Period).

<1.2. Technical issues>
Next, a technical problem of the embodiment of the present disclosure will be described with reference to FIGS.

(Basic issues)
Non-patent literature “3GPP TSG RAN WG1 Meeting # 76bis, Shenzhen, China, 31st March-4th April 2014, CATT,“ Number of HARQ processes for low complexity HD-FDD UEs ”and“ 3GPP TSG RAN WG1 Meeting # 76bis, Shenzhen , PR China, 31st March-4th April 2014, Ericsson, “Half duplex FDD for low cost MTC UE”, proposes the number of HARQ processes necessary for a terminal device performing HD-FDD operation. Specifically, under the existing assumption of FDD, transmission / reception of uplink scheduling information 4 subframes before transmission / reception of uplink data and transmission / reception of ACK / NACK 4 subframes after transmission / reception of data It is proposed that the maximum number of HARQ processes for each of the uplink and the downlink is 3.

According to the technique disclosed in the non-patent document described above, for example, three subframes out of eight subframes are allocated to the downlink, and the other three out of the eight subframes. Subframes are assigned to the uplink. Such allocation of subframes to the downlink / uplink may actually be realized by allocation of radio resources (eg, resource blocks) by the scheduler of the base station. Also, a subframe between the three subframes (downlink) and the other three subframes (uplink) is reserved for transmission / reception switching, and the radio resources of the subframe are: It is not assigned to the terminal device that performs the switching. Hereinafter, a specific example of this point will be described with reference to FIGS. 8 and 9.

FIG. 8 is an explanatory diagram for explaining an example of a subframe in which downlink data is transmitted and a subframe in which ACK / NACK for the downlink data is transmitted. Referring to FIG. 8, a subframe in which downlink data is transmitted by the eNB and a subframe in which ACK / NACK for the downlink data is transmitted by the UE are illustrated. Specifically, three consecutive subframes are allocated as subframes in which downlink data is transmitted on the PDSCH. One subframe after the three consecutive subframes is reserved for switching from downlink reception to uplink transmission at the UE. Three consecutive subframes after the one subframe are allocated as subframes in which ACK / NACK for the downlink data is transmitted on the PUCCH. That is, the ACK / NACK for the downlink data can be transmitted by the UE in a subframe four subframes after the subframe in which the downlink data is transmitted by the eNB. Furthermore, one subframe after the three consecutive subframes is reserved for switching from uplink transmission to downlink reception at the UE. In this way, downlink data and ACK / NACK are transmitted with a round trip time of 8 subframes.

FIG. 9 is an explanatory diagram for explaining an example of a subframe in which uplink data is transmitted and a subframe in which ACK / NACK for the uplink data is transmitted. Referring to FIG. 9, a subframe in which uplink data is transmitted by the UE and a subframe in which ACK / NACK for the uplink data is transmitted by the eNB are illustrated. Specifically, three consecutive subframes are allocated as subframes in which uplink data is transmitted on the PUSCH. One subframe after the three consecutive subframes is reserved for switching from uplink transmission to downlink reception at the UE. Three consecutive subframes after the one subframe are allocated as subframes in which ACK / NACK for the uplink data is transmitted by PHICH (Physical Hybrid ARQ Indicator Channel). That is, ACK / NACK for the downlink data can be transmitted by the eNB in a subframe after 4 subframes of the subframe in which the uplink data is transmitted by the UE. Furthermore, one subframe after the three consecutive subframes is reserved for switching from downlink reception to uplink transmission at the UE. Thus, uplink data and ACK / NACK are transmitted with a round trip time of 8 subframes.

However, when downlink subframes and uplink subframes are fixed in this way, it is difficult to flexibly allocate radio resources to terminal devices that perform HD-FDD operations, for example, according to traffic. Can be.

Therefore, the embodiment of the present disclosure makes it possible to more flexibly allocate radio resources to terminal devices that perform HD-FDD operations.

(Other issues)
(A) Transmission of ACK / NACK After receiving the downlink data transmitted by the base station, the terminal device needs to transmit ACK / NACK for the downlink data to the base station. In addition, after transmitting uplink data to the base station, the terminal device needs to receive ACK / NACK for the uplink data from the base station.

However, radio resources are freely allocated to terminal devices that perform HD-FDD operation, and ACK / NACK for the data is transmitted after 4 subframes of data transmission / reception, for example, as the existing premise of FDD Then, there is a possibility that transmission / reception of ACK / NACK is not properly performed.

Therefore, the embodiment of the present disclosure further enables, for example, a terminal apparatus and a base station that perform an HD-FDD operation to appropriately transmit / receive ACK / NACK.

(B) Case of Carrier Aggregation In carrier aggregation, ACK / NAC for downlink data transmitted in the secondary cell is transmitted in the primary cell. Therefore, after receiving the downlink data transmitted in the secondary cell, the terminal device needs to transmit ACK / NACK for the downlink data in the primary cell.

However, there is a possibility that the terminal apparatus performs downlink reception in the primary cell in a subframe in which ACK / NACK for downlink data transmitted in the secondary cell is transmitted. As a result, there is a concern that ACK / NACK for the downlink data is not transmitted. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 10 is an explanatory diagram for explaining an example of ACK / NACK transmission in the case of carrier aggregation. Referring to FIG. 10, uplink and downlink situations are shown for a primary cell (Pcell) and a secondary cell (Scell) of a terminal device. In this example, the secondary cell is a TDD component carrier (CC), and the primary cell is an FDD CC. For example, in the secondary cell, uplink and downlink transmission / reception is performed in accordance with configuration 3 defined in 3GPP. On the other hand, in the primary cell, as described with reference to FIGS. 8 and 9, uplink and downlink transmission / reception is performed in a round trip time of 8 subframes. Here, the terminal apparatus transmits ACK / NACK for downlink data transmitted according to the configuration 3 in the secondary cell in a subframe for ACK / NACK transmission corresponding to the configuration 3. That is, the terminal apparatus transmits the ACK / NACK in an uplink subframe of configuration 3. Further, in the case of carrier aggregation, the terminal device needs to transmit the ACK / NACK in the primary cell. As an example, in a secondary cell, when downlink data is transmitted to the terminal apparatus in a subframe having a subframe number of 9, the terminal apparatus transmits an ACK / NACK for the downlink data to the subframe. It transmits in the next subframe whose number is 4. Further, the terminal device needs to transmit the ACK / NACK in the primary cell. However, since the terminal apparatus performs downlink transmission in the next subframe having a subframe number of 4 in the primary cell, it cannot transmit ACK / NACK for the downlink data.

Therefore, the modification of the embodiment of the present disclosure further enables, for example, a terminal apparatus and a base station that perform HD-FDD operation to appropriately transmit / receive ACK / NACK even in the case of carrier aggregation.

<< 2. Schematic configuration of communication system >>
Next, a schematic configuration of the communication system 1 according to the embodiment of the present disclosure will be described with reference to FIG. FIG. 11 is an explanatory diagram illustrating an example of a schematic configuration of the communication system 1 according to the embodiment of the present disclosure. Referring to FIG. 11, the communication system 1 includes a base station 100, a terminal device 20, and a terminal device 200. The communication system 1 is, for example, a system that conforms to LTE, LTE-Advanced, or a communication standard based on these.

(Base station 100)
Base station 100 is a base station of cell 10. The cell 10 is an FDD cell, and the base station 100 performs FDD wireless communication. For example, the base station 100 transmits a downlink signal in the FDD downlink band and receives an uplink signal in the FDD uplink band.

For example, the base station 100 performs wireless communication with the terminal device. The terminal device includes a terminal device 20 and a terminal device 200.

(Terminal device 20)
The terminal device 20 performs wireless communication with the base station.

For example, the terminal device 20 supports FDD and performs wireless communication using FDD. That is, the terminal device 20 performs wireless communication with a base station (for example, the base station 100) of the FDD cell. Specifically, for example, the terminal device 20 supports FD-FDD and performs wireless communication using FD-FDD. That is, the terminal device 20 can simultaneously perform both downlink reception in the FDD downlink band and uplink transmission in the FDD uplink band. For example, the terminal device 20 can perform both the downlink reception and the uplink transmission in the same subframe.

(Terminal device 200)
The terminal device 200 performs wireless communication with the base station.

For example, the terminal device 200 supports FDD and performs wireless communication using FDD. That is, the terminal device 200 performs wireless communication with a base station (for example, the base station 100) of the FDD cell. Specifically, for example, the terminal device 200 supports HD-FDD and performs wireless communication using HD-FDD. That is, the terminal device 200 performs uplink transmission in the FDD uplink band at a certain time, and performs downlink reception in the FDD downlink and band at another time. For example, the terminal apparatus 200 performs the uplink transmission in a certain subframe and performs the downlink reception in another subframe.

Note that, for example, the terminal device 200 does not support FD-FDD and does not perform wireless communication using FD-FDD. The terminal device 200 may support TDD or may not support TDD.

(Features of Embodiment of Present Disclosure)
In particular, in the embodiment of the present disclosure, the base station 100 notifies the terminal device 200 of a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication using HD-FDD.

In particular, in the embodiment of the present disclosure, the terminal device 200 performs HD-FDD wireless communication with the base station 100 in accordance with the subframe configuration notified from the base station 100 to the terminal device 200.

Thereby, for example, it becomes possible to allocate radio resources more flexibly to the terminal device 200 that performs radio communication using HD-FDD.

The uplink subframe is a subframe in which a terminal device that performs wireless communication using HD-FDD performs uplink transmission in the uplink band. The downlink subframe is a subframe in which the terminal apparatus performs downlink reception in the downlink band.

<< 3. Subframe configuration >>
Subsequently, an example of a subframe configuration according to an embodiment of the present disclosure will be described with reference to FIGS. 12 and 13.

As described above, the base station 100 notifies the terminal device 200 of a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication using HD-FDD. In addition, the terminal device 200 performs HD-FDD wireless communication with the base station 100 according to the subframe configuration.

Here, the characteristics of the subframe configuration and selection of the subframe configuration will be described.

(Characteristics of subframe configuration)
(A) Radio Frame For example, the subframe configuration defines an uplink subframe and a downlink subframe for radio communication using HD-FDD among a predetermined number of subframes included in the radio frame.

More specifically, for example, the subframe configuration defines an uplink subframe and a downlink subframe for the radio communication among the ten subframes included in the radio frame.

(B) Ratio of uplink and downlink For example, in the subframe configuration, of the predetermined number of subframes, the first number of subframes for wireless communication is determined as an uplink subframe. Of the predetermined number of subframes, a second number of subframes different from the first number is defined as a downlink subframe.

As an example, in the subframe configuration, three subframes out of 10 subframes are defined as uplink subframes, and 5 subframes out of 10 subframes are defined as downlink subframes. .

Thereby, for example, a terminal device that performs wireless communication using HD-FDD can use more wireless resources in one of the uplink and the downlink.

Of course, in the subframe configuration, the same number of subframes may be defined as uplink subframes and downlink subframes, respectively. As an example, in the subframe configuration, four subframes of ten subframes are defined as uplink subframes, and four subframes of the ten subframes are defined as downlink subframes. May be.

(C) Consideration of PBCH For example, in the subframe configuration, a subframe in which a physical broadcast channel (PBCH) is arranged among the predetermined number of subframes is defined as a downlink subframe.

Specifically, for example, the PBCH is arranged in a subframe having a subframe number of 0 out of 10 subframes, and the subframe configuration has a function of down-converting a subframe having a subframe number of 0. Determined as a link subframe.

Thereby, for example, a terminal device that performs wireless communication using HD-FDD can receive important system information (for example, MIB).

(D) Blank subframe In the above subframe configuration, a specific subframe between the uplink subframe and the downlink subframe is transmitted from the terminal device that performs radio communication using HD-FDD in the uplink band. It is defined as a subframe in which neither transmission nor downlink reception in the downlink band is performed (hereinafter referred to as “blank subframe”).

As an example, in the subframe configuration, three consecutive subframes of 10 subframes are defined as uplink subframes, and 5 consecutive subframes of 10 subframes are downlinked. Determined as a subframe. Further, in the subframe configuration, two subframes positioned between the three consecutive subframes and the five consecutive subframes may be defined as blank subframes.

Thereby, for example, a terminal device that performs wireless communication using HD-FDD can switch between uplink transmission and downlink reception.

(E) Specific Example (e-1) UL / DL Configuration of TDD As an example, the subframe configuration is a UL / DL configuration of TDD.

For example, the base station 100 notifies the terminal device 200 of the UL / DL configuration of TDD as the subframe configuration. Also, the terminal device 200 performs wireless communication using HD-FDD according to the UL / DL configuration that the base station 100 notifies the terminal device 200 as the subframe configuration. The UL / DL configuration is, for example, any one of configurations 0 to 6 shown in FIG. Alternatively, in consideration of switching between uplink transmission and downlink transmission, the UL / DL configuration may be any of configurations 3 to 5 shown in FIG.

For example, the terminal device 200 does not perform uplink transmission or downlink reception in a specific subframe between the downlink subframe and the uplink subframe in the UL / DL configuration, and performs uplink transmission and downlink. Switch to link reception. Further, the base station 100 does not allocate the radio resource of the specific subframe to the terminal device 200. For example, the specific subframe includes a special subframe and a subframe (uplink subframe or downlink subframe) immediately after the uplink subframe and immediately before the downlink subframe. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 12 is an explanatory diagram for explaining an example of wireless communication in HD-FDD according to the UL / DL configuration of TDD. Referring to FIG. 12, configurations 3 to 5 defined in 3GPP are shown.

As a first example, the terminal device 200 performs HD-FDD wireless communication according to the configuration 3. In this case, the terminal apparatus 200 does not perform uplink transmission or downlink reception in a special subframe with a subframe number of 1 and a downlink subframe with a subframe number of 5, and performs uplink transmission. And downlink reception. The terminal device 200 performs downlink reception in downlink subframes with subframe numbers 0 and 6 to 9, and performs uplink transmission in uplink subframes with subframe numbers 2 to 4.

As a second example, the terminal device 200 performs HD-FDD wireless communication according to the configuration 4. In this case, the terminal device 200 does not perform uplink transmission or downlink reception in a special subframe with a subframe number of 1 and a downlink subframe with a subframe number of 4, and performs uplink transmission. And downlink reception. The terminal device 200 performs downlink reception in downlink subframes with subframe numbers 0, 5 to 9, and performs uplink transmission in uplink subframes with subframe numbers 2 and 3.

As a third example, the terminal device 200 performs HD-FDD wireless communication according to the configuration 5. In this case, the terminal device 200 does not perform uplink transmission or downlink reception in a special subframe with a subframe number of 1 and a downlink subframe with a subframe number of 3, and performs uplink transmission. And downlink reception. The terminal device 200 performs downlink reception in the downlink subframes whose subframe numbers are 0, 5 to 9, and performs uplink transmission in the uplink subframe whose subframe number is 2.

Thus, for example, it becomes possible to control HD-FDD wireless communication using the TDD UL / DL configuration.

(E-2) Other Configurations As another example, the subframe configuration may be another configuration different from the UL / DL configuration of TDD.

For example, the base station 100 may notify the terminal device 200 of the other configuration as the subframe configuration. Also, the terminal device 200 may perform wireless communication using HD-FDD according to the other configuration that the base station 100 notifies the terminal device 200 as the subframe configuration. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 13 is an explanatory diagram for explaining an example of wireless communication in HD-FDD according to another configuration different from the UL / DL configuration of TDD. Referring to FIG. 13, a configuration X that is different from the TDD UL / DL configuration is shown. Configuration X defines subframes with subframe numbers 0 and 7 to 9 as downlink subframes, and subframes with subframe numbers 2 to 5 as uplink subframes. Further, in the configuration X, subframes with subframe numbers 1 and 6 are replaced with blank subframes (that is, a terminal device that performs radio communication using HD-FDD performs uplink transmission and downlink bandwidth in the uplink bandwidth). Subframes in which neither downlink reception is performed). The terminal device 200 performs HD-FDD wireless communication according to the configuration X. Specifically, in the subframes whose subframe numbers are 1 and 6, the terminal device 200 performs switching between uplink transmission and downlink reception without performing uplink transmission or downlink reception. The terminal device 200 performs downlink reception in downlink subframes with subframe numbers 0 and 7 to 9, and performs uplink transmission in uplink subframes with subframe numbers 2 to 5.

Thereby, radio resources can be allocated more flexibly without restriction of UL / DL configuration of TDD.

(Subframe configuration selection)
(A) Selection from a plurality of subframe configurations For example, the subframe configuration is a subframe configuration selected from a plurality of subframe configurations.

Specifically, for example, a plurality of subframe configurations are determined in advance for wireless communication with HD-FDD, similarly to the UL / DL configuration of TDD. For example, the base station 100 selects a subframe configuration from the plurality of subframe configurations, and notifies the terminal device 200 of the selected subframe configuration.

This can reduce the radio resources required for notification of the above subframe configuration.

(B) Selection for each terminal device For example, the subframe configuration is a subframe configuration individually selected for the terminal device 200.

For example, the subframe configuration is a subframe configuration individually selected for the terminal device 200 in accordance with the traffic of the terminal device 200.

Specifically, for example, a subframe configuration is selected for the terminal device 200 from the plurality of subframe configurations based on the traffic characteristics of the terminal device 200. The traffic characteristic is, for example, a past or current traffic volume, or a traffic volume expected in the future. For example, the base station 100 selects a subframe configuration from among the plurality of subframe configurations based on the traffic characteristics of the terminal device 200 for the terminal device 200, and the selected base station 100 The terminal device 200 is notified of the subframe configuration.

Thereby, for example, it becomes possible to allocate radio resources more flexibly to each terminal device that performs radio communication using HD-FDD. For example, radio resources can be flexibly allocated according to the traffic of the terminal device.

Note that the embodiment of the present disclosure is not limited to such an example. For example, the subframe configuration may be a subframe configuration common to the terminal devices 200. As an example, the subframe configuration may be the configuration 3 illustrated in FIG. 12 without depending on the terminal device 200.

<< 4. Configuration of each device >>
Subsequently, with reference to FIG. 14 to FIG. 21, an example of the configuration of the base station 100 and the terminal device 200 according to the embodiment of the present disclosure will be described.

<4.1. Base station configuration >>
An example of the configuration of the base station 100 according to the embodiment of the present disclosure will be described with reference to FIGS. FIG. 14 is a block diagram illustrating an exemplary configuration of the base station 100 according to the embodiment of the present disclosure. Referring to FIG. 14, the base station 100 includes an antenna unit 110, a wireless communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 150.

(Antenna unit 110)
The antenna unit 110 radiates a signal output from the wireless communication unit 120 to the space as a radio wave. Further, the antenna unit 110 converts radio waves in space into a signal and outputs the signal to the wireless communication unit 120.

(Wireless communication unit 120)
The wireless communication unit 120 transmits and receives signals. For example, the radio communication unit 120 transmits a downlink signal to the terminal device and receives an uplink signal from the terminal device.

(Network communication unit 130)
The network communication unit 130 transmits and receives information. For example, the network communication unit 130 transmits information to other nodes and receives information from other nodes. For example, the other nodes include a core network node and other base stations.

(Storage unit 140)
The storage unit 140 temporarily or permanently stores programs and data for the operation of the base station 100.

(Processing unit 150)
The processing unit 150 provides various functions of the base station 100. The processing unit 150 includes a selection unit 151, an information acquisition unit 153, and a control unit 155. The processing unit 150 may further include other components other than these components. That is, the processing unit 150 can perform operations other than the operations of these components.

(Selection unit 151)
The selection unit 151 selects a subframe configuration that defines an uplink subframe and a downlink subframe for HD-FDD wireless communication.

(A) Selection from a plurality of subframe configurations For example, as described above, the selection unit 151 selects a subframe configuration from a plurality of subframe configurations.

(B) Selection for Each Terminal Device For example, the selection unit 151 individually selects a subframe configuration for the terminal device 200 as described above. In other words, the selection unit 151 selects a subframe configuration for each terminal device 200.

For example, the selection unit 151 selects a subframe configuration for the terminal device 200 based on the traffic characteristics of the terminal device 200. Specifically, for example, the selection unit 151 selects a subframe configuration for the terminal device 200 from a plurality of subframe configurations based on the traffic characteristics of the terminal device 200.

For example, the terminal device 200 from which the subframe configuration is selected is a device having the capability of performing wireless communication according to the subframe configuration for performing uplink subframes and downlink subframes for wireless communication in HD-FDD. . For example, the terminal device 200 transmits capability information indicating the capability of the terminal device 200 to the base station 100. The capability information indicates that the terminal device 200 is a device having the capability. As an example, the terminal device 200 transmits a UE capability information message to the base station 100. Then, the selection unit 151 acquires the capability information and selects the subframe configuration for the terminal device 200 having the capability. Thereby, for example, the base station 100 can identify a terminal device that should perform wireless communication in accordance with the subframe configuration.

Note that the selection unit 151 may select a subframe configuration common to the terminal devices 200, instead of selecting a subframe configuration for each terminal device 200.

(Information acquisition unit 153)
The information acquisition unit 153 acquires information indicating a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication using HD-FDD (hereinafter, referred to as “subframe configuration information”).

(A) Subframe configuration For example, the subframe configuration is a subframe configuration selected by the selection unit 151. That is, the information acquisition unit 153 acquires information indicating the selected subframe configuration.

(B) Subframe configuration information For example, the subframe configuration information is identification information of the subframe configuration. Specifically, for example, identification information is given to each of a plurality of subframe configurations, and the subframe configuration information is identification information given to the subframe configuration (that is, identification information of the subframe configuration). is there. As an example, the subframe configuration is a configuration number.

(Control unit 155)
(A) Notification of subframe configuration The control unit 155 notifies the terminal device 200 of the above subframe configuration (that is, a subframe configuration that determines an uplink subframe and a downlink subframe for wireless communication in HD-FDD). Notice.

(A-1) First Example: Individual Signaling As a first example, the control unit 155 notifies the terminal device 200 of the subframe configuration through individual signaling to the terminal device 200.

For example, the individual signaling is RRC (Radio Resource Control) signaling. As an example, the individual signaling is signaling in a connection establishment procedure.

For example, the control unit 155 generates a message including the subframe configuration information (that is, information indicating the subframe configuration), and transmits the message to the terminal device 200 via the antenna unit 110 and the wireless communication unit 120. .

By the notification of the subframe configuration by signaling, for example, it becomes possible to notify the terminal device 200 of the subframe configuration selected for each terminal device 200.

In the first example, the subframe configuration may be, for example, a subframe configuration individually selected for the terminal device 200 (that is, a subframe configuration selected for each terminal device 200). The subframe configuration common to the terminal devices 200 may be used.

(A-2) Second Example: Notification of System Information As a second example, the control unit 155 may notify the terminal device 200 of the subframe configuration by notification of system information indicating the subframe configuration. Good.

For example, the control unit 155 may generate system information including the subframe configuration information and notify the system information via the antenna unit 110 and the wireless communication unit 120.

In the second example, the subframe configuration is a subframe configuration common to the terminal devices 200.

As described above, the base station 100 (the control unit 155) notifies the terminal device 200 of the subframe configuration. Thereby, for example, it becomes possible to allocate radio resources more flexibly to the terminal device 200 that performs radio communication using HD-FDD. More specifically, for example, the base station 100 can flexibly select a subframe configuration and share the subframe configuration with the terminal device 200. Therefore, radio resources are allocated to terminal device 200 in accordance with a flexibly selected subframe configuration. That is, radio resources can be flexibly allocated to the terminal device 200.

(B) ACK / NACK transmission subframe (b-1) First example: predetermined subframe As a first example, the above subframe configuration (ie, base station 100 (control unit 155) is a terminal) A subframe for ACK / NACK transmission suitable for the subframe configuration to be notified to apparatus 200 is determined in advance.

For example, the subframe for ACK / NACK transmission suitable for the subframe configuration is determined in advance, and is therefore known to the base station 100 and the terminal device 200. In this case, the base station 100 (the control unit 155) transmits / receives ACK / NACK in the subframe for ACK / NACK transmission suitable for the subframe configuration (notified to the terminal device 200 by the base station 100). Do. Also, the terminal device 200 transmits and receives ACK / NACK in the subframe for ACK / NACK transmission suitable for the subframe configuration (notified to the terminal device 200 by the base station 100).

Thus, for example, only by notification of the subframe configuration, transmission / reception of ACK / NACK is appropriately performed in wireless communication according to the subframe configuration. Therefore, radio resources can be saved.

(B-2) Second Example: Subframe that Base Station Reports to Terminal Device As a second example, the control unit 155 assigns a subframe for ACK / NACK transmission suitable for the subframe configuration to the terminal device 200. May be notified.

For example, the base station 100 (or another node) may determine a subframe for ACK / NACK transmission suitable for the subframe configuration. Then, the control unit 155 may notify the terminal device 200 of the subframe (for example, together with the subframe configuration). And the base station 100 and the terminal device 200 may perform transmission / reception of ACK / NACK by the said sub-frame.

Thus, for example, ACK / NACK transmission / reception can be performed more flexibly in wireless communication according to the subframe configuration.

(B-3) ACK / NACK transmission subframe suitable for subframe configuration -ACK / NACK for downlink data
For example, the subframe for ACK / NACK transmission suitable for the subframe configuration includes a subframe in which ACK / NACK for downlink data transmitted according to the subframe configuration is transmitted. The subframe in which ACK / NACK for the downlink data is transmitted is an uplink subframe having the above subframe configuration.

Thereby, for example, the terminal device 200 that performs HD-FDD wireless communication according to the subframe configuration can transmit ACK / NACK for downlink data in the uplink.

-ACK / NACK for uplink data
For example, the subframe for ACK / NACK transmission suitable for the subframe configuration includes a subframe in which ACK / NACK for uplink data transmitted according to the subframe configuration is transmitted. The subframe in which ACK / NACK for the uplink data is transmitted is a downlink subframe having the above subframe configuration.

Accordingly, for example, the terminal device 200 that performs HD-FDD wireless communication according to the subframe configuration described above can receive ACK / NACK for uplink data in the downlink.

Example of Subframe for ACK / NACK Transmission Hereinafter, an example of a subframe for ACK / NACK transmission suitable for the subframe configuration will be described with reference to FIGS. 15 to 18.

--- First example (Configuration 3)
FIG. 15 is an explanatory diagram for describing a first example of an ACK / NACK transmission subframe suitable for a subframe configuration. In this example, as described with reference to FIG. 12, the terminal device 200 performs HD-FDD wireless communication according to the configuration 3 of the TDD UL / DL configuration. In this case, base station 100 and terminal apparatus 200 perform ACK / NACK transmission / reception in subframes for transmission of ACK / NACK predetermined for configuration 3. Naturally, the subframe for transmitting ACK / NACK predetermined for configuration 3 is a subframe for transmitting ACK / NACK suitable for configuration 3.

Specifically, ACK / NACK for downlink data transmitted in a downlink subframe having a subframe number of 6 is transmitted in an uplink subframe having a subframe number of 2. ACK / NACK for downlink data transmitted in downlink subframes with subframe numbers 7 and 8 is transmitted in an uplink subframe with subframe number 3. The ACK / NACK for the downlink data transmitted in the downlink subframe whose subframe number is 9 or 0 is transmitted in the uplink subframe whose subframe number is 4.

Specifically, ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 2 is transmitted in a downlink subframe having a subframe number of 8. An ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 3 is transmitted in a downlink subframe having a subframe number of 9. ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 4 is transmitted in a downlink subframe having a subframe number of 0.

--- Second example (configuration 4)
FIG. 16 is an explanatory diagram for describing a second example of an ACK / NACK transmission subframe suitable for a subframe configuration. In this example, as described with reference to FIG. 12, the terminal device 200 performs HD-FDD wireless communication according to the configuration 4 of the UL / DL configuration of TDD. In this case, the base station 100 and the terminal device 200 perform ACK / NACK transmission / reception in subframes for transmission of ACK / NACK predetermined for the configuration 4. Naturally, the subframe for transmitting ACK / NACK predetermined for configuration 4 is a subframe for transmitting ACK / NACK suitable for configuration 4.

Specifically, ACK / NACK for downlink data transmitted in downlink subframes with subframe numbers 0 and 5 is transmitted in an uplink subframe with subframe number 2. ACK / NACK for downlink data transmitted in downlink subframes having subframe numbers 6 to 9 is transmitted in an uplink subframe having subframe number 3.

Specifically, ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 2 is transmitted in a downlink subframe having a subframe number of 8. An ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 3 is transmitted in a downlink subframe having a subframe number of 9.

--- Third example (configuration 5)
FIG. 17 is an explanatory diagram for describing a third example of an ACK / NACK transmission subframe suitable for a subframe configuration. In this example, as described with reference to FIG. 12, the terminal device 200 performs HD-FDD wireless communication according to the configuration 5 of the UL / DL configuration of TDD. In this case, the base station 100 and the terminal device 200 perform ACK / NACK transmission / reception in subframes for transmission of ACK / NACK predetermined for the configuration 5. Of course, the ACK / NACK transmission subframe predetermined for the configuration 5 is an ACK / NACK transmission subframe suitable for the configuration 5.

Specifically, ACK / NACK for downlink data transmitted in all downlink subframes is transmitted in an uplink subframe having a subframe number of 2.

Specifically, ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 2 is transmitted in a downlink subframe having a subframe number of 8.

-Fourth example (configuration X)
FIG. 18 is an explanatory diagram for describing a fourth example of an ACK / NACK transmission subframe suitable for a subframe configuration. In this example, as described with reference to FIG. 13, the terminal device 200 performs wireless communication using HD-FDD according to the configuration X different from the UL / DL configuration of TDD. In this case, the base station 100 and the terminal device 200 may use a subframe for transmitting ACK / NACK suitable for the configuration X (for example, a subframe for transmitting ACK / NACK predetermined for the configuration X). ), ACK / NACK is transmitted / received.

Specifically, for example, ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 2 is transmitted in a downlink subframe having a subframe number of 7. An ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 3 is transmitted in a downlink subframe having a subframe number of 8. An ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 4 is transmitted in a downlink subframe having a subframe number of 9. ACK / NACK for uplink data transmitted in an uplink subframe having a subframe number of 5 is transmitted in a downlink subframe having a subframe number of 0.

Specifically, for example, ACK / NACK for downlink data transmitted in a downlink subframe having a subframe number of 7 is transmitted in an uplink subframe having a subframe number of 2. An ACK / NACK for downlink data transmitted in a downlink subframe having a subframe number of 8 is transmitted in an uplink subframe having a subframe number of 3. An ACK / NACK for downlink data transmitted in a downlink subframe having a subframe number of 9 is transmitted in an uplink subframe having a subframe number of 4. An ACK / NACK for downlink data transmitted in a downlink subframe having a subframe number of 0 is transmitted in an uplink subframe having a subframe number of 5.

That is, ACK / NACK for data is transmitted in a subframe that is five subframes after the subframe in which the data is transmitted.

-Common subframe among subframe configurations--ACK / NACK for downlink data
For example, as described above, the subframe configuration is a subframe configuration selected from a plurality of subframe configurations. In this case, the subframe in which ACK / NACK for the downlink data is transmitted may be an uplink subframe that is common among the plurality of subframe configurations.

As an example, even if the subframe configuration is any of the configurations 0 to 6 shown in FIG. 7, the subframe in which the ACK / NACK for the downlink data is transmitted has a subframe number of 2 May be an uplink subframe.

Thereby, for example, even when the subframe configuration is dynamically changed, the terminal device 200 can transmit ACK / NACK for downlink data.

--ACK / NACK for uplink data
For example, as described above, the subframe configuration is a subframe configuration selected from a plurality of subframe configurations. In this case, the subframe in which ACK / NACK for the uplink data is transmitted may be a downlink subframe that is common among the plurality of subframe configurations.

As an example, even if the subframe configuration is any of the configurations 0 to 6 shown in FIG. 7, the subframe in which the ACK / NACK for the uplink data is transmitted has a subframe number of 0. 5 may be at least one of the downlink subframes.

Thereby, for example, even when the subframe configuration is dynamically changed, the terminal device 200 can receive ACK / NACK for uplink data.

(C) Subframe for transmitting uplink scheduling information (c-1) First example: predetermined subframe As a first example, the subframe configuration (ie, base station 100 (control unit 155) A subframe for uplink scheduling information transmission suitable for a subframe configuration to be notified to the terminal device 200 is determined in advance.

For example, the subframe for uplink scheduling information transmission suitable for the subframe configuration is determined in advance, and is therefore known to the base station 100 and the terminal device 200. In this case, the base station 100 (the control unit 155) performs uplink scheduling information in the subframe for uplink scheduling information transmission suitable for the subframe configuration (the base station 100 notifies the terminal device 200). Send. Also, the terminal apparatus 200 receives uplink scheduling information in the subframe for uplink scheduling information transmission suitable for the subframe configuration (notified to the terminal apparatus 200 by the base station 100).

Thereby, for example, only by notification of the subframe configuration, uplink scheduling information is appropriately transmitted and received in wireless communication according to the subframe configuration.

(C-2) Second Example: Subframe that Base Station Reports to Terminal Device As a second example, the control unit 155 transmits a subframe for uplink scheduling information transmission suitable for the subframe configuration to the terminal device. 200 may be notified.

For example, the base station 100 (or another node) may determine a subframe for uplink scheduling information transmission suitable for the subframe configuration. Then, the control unit 155 may notify the terminal device 200 of the subframe (for example, together with the subframe configuration). Then, the base station 100 may transmit uplink scheduling information in the subframe, and the terminal device 200 may receive uplink scheduling information in the subframe.

Thereby, for example, transmission and reception of uplink scheduling information can be performed more flexibly in wireless communication according to the subframe configuration.

(C-3) Subframe for UL scheduling information transmission suitable for subframe configuration The subframe for uplink scheduling information transmission suitable for the subframe configuration is a downlink subframe having the subframe configuration.

Note that, for example, as described above, the subframe configuration is a subframe configuration selected from a plurality of subframe configurations. In this case, the subframe for uplink scheduling information transmission suitable for the subframe configuration may be a downlink subframe that is common among the plurality of subframe configurations. As an example, even if the subframe configuration is any of the configurations 0 to 6 shown in FIG. 7, the subframe for uplink scheduling information transmission suitable for the subframe configuration has a subframe number of 0. 5 may be at least one of the downlink subframes. Thereby, for example, even when the subframe configuration is dynamically changed, the terminal device 200 can receive uplink scheduling information.

(D) Control of Wireless Communication According to Subframe Configuration For example, the control unit 155 controls the HD-FDD wireless communication with the terminal device 200 according to the subframe configuration.

(D-1) Execution of retransmission request process For example, the control unit 155 determines that the ACK / NACK for the uplink data transmitted by the terminal device 200 according to the subframe configuration is a downlink subframe with the subframe configuration in the terminal device The retransmission request process is executed so that the message is transmitted to the client 200.

For example, the retransmission request process is a HARQ process.

For example, the control unit 155 transmits an ACK / NACK for the uplink data and receives an ACK / NACK for the downlink data in a subframe for ACK / NACK transmission suitable for the subframe configuration. As described above, the retransmission request process is executed. Accordingly, as described with reference to FIGS. 15 to 18, for example, ACK / NACK for uplink data transmitted by the terminal apparatus 200 is transmitted in the downlink subframe.

Thus, for example, the terminal device 200 that performs wireless communication using HD-FDD can receive ACK / NACK for uplink data.

Note that the downlink subframe in which the ACK / NACK is transmitted may include a subframe other than a subframe four subframes after the uplink subframe in which the uplink data is transmitted. For example, in the example described with reference to FIGS. 15 to 18, the downlink subframe in which ACK / NACK for uplink data is transmitted is four subframes of the uplink subframe in which the uplink data is transmitted. Subframes other than the subsequent subframe are included.

Thereby, ACK / NACK transmission / reception can be performed more flexibly without being bound by the existing premise of FDD.

(D-2) Radio resource allocation (scheduling)
For example, the control unit 155 allocates radio resources to the terminal device 200 according to the subframe configuration. The radio resource includes an uplink band radio resource and a downlink band radio resource.

-Specific subframe For example, the control unit 155 does not allocate to the terminal device 200 radio resources of a specific subframe between the uplink subframe and the down subframe having the above subframe configuration.

For example, the above subframe configuration is a TDD UL / DL configuration. In this case, the specific subframe includes a special subframe and a subframe (uplink subframe or downlink subframe) immediately after the uplink subframe and immediately before the downlink subframe. Note that, as described above, the subframe configuration may be another subframe configuration different from the TDD UL / DL configuration.

Referring to FIG. 12 again, for example, when the subframe configuration is configuration 3, the control unit 155 controls the radio resource of the special subframe whose subframe number is 1 and the down frame whose subframe number is 5 The radio resource of the link subframe is not allocated to the terminal device 200. For example, when the subframe configuration is configuration 4, the control unit 155 determines the radio resource of the special subframe whose subframe number is 1 and the radio resource of the downlink subframe whose subframe number is 4. The terminal device 200 is not assigned. For example, when the subframe configuration is configuration 5, the control unit 155 determines a radio resource of a special subframe having a subframe number of 1 and a radio resource of a downlink subframe having a subframe number of 3. The terminal device 200 is not assigned.

Referring again to FIG. 13, for example, when the subframe configuration is configuration X, the control unit 155 does not allocate the radio resources of the subframes whose subframe numbers are 1 and 6 to the terminal device 200.

Thereby, for example, the terminal device 200 can switch between uplink transmission and downlink reception.

Note that, as described above, the specific subframe may be defined as a blank subframe by the subframe configuration.

-Other Subframes For example, the control unit 155 allocates radio resources of other subframes different from the specific subframe to the terminal device 200.

For example, the other subframe includes an uplink subframe and a down subframe having the subframe configuration.

--Uplink subframe For example, the radio resource of the other subframe includes the radio resource of the uplink subframe having the subframe configuration among the radio resources of the uplink band. That is, the control unit 155 allocates the radio resource of the uplink subframe having the subframe configuration to the terminal device 200 among the radio resources of the uplink band.

For example, the assigned radio resource is a resource block. More specifically, for example, the allocated radio resource is a physical uplink shared channel (PUSCH) resource block.

--Downlink subframe For example, the radio resource of the other subframe includes a radio resource of a downlink subframe having the subframe configuration among radio resources of the downlink band. That is, the control unit 155 allocates the radio resource of the downlink subframe having the above-described subframe configuration among the radio resources of the downlink band to the terminal device 200.

For example, the assigned radio resource is a resource block. More specifically, for example, the allocated radio resource is a physical downlink shared channel (PDSCH) resource block.

(D-3) Notification of Radio Resource Allocation For example, the control unit 155 notifies the terminal device 200 of the allocation of radio resources to the terminal device 200.

Specifically, for example, the control unit 155 generates scheduling information indicating allocation of radio resources to the terminal device 200, and transmits a signal of the scheduling information to a control channel (for example, a physical downlink control channel (Physical Downlink Control Channel). )) To map.

For example, the control unit 155 assigns the radio resource of the uplink subframe having the subframe configuration to the terminal device 200 to the terminal device 200 in a subframe for uplink scheduling information transmission suitable for the subframe configuration. Notice.

The control unit 155 assigns the radio resource of the uplink subframe having the subframe configuration to the terminal device 200 in a downlink subframe that is not a subframe four subframes before the uplink subframe. The device 200 may be notified. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 19 is an explanatory diagram for explaining an example of notification of allocation of radio resources of uplink subframes to the terminal device 200. In this example, as in the example of FIG. 18, the terminal device 200 performs wireless communication using HD-FDD according to the configuration X different from the UL / DL configuration of TDD. In this case, the allocation of the radio resource of the up subframe to the terminal device 200 is notified to the terminal device 200 in the downlink subframe five subframes before the uplink subframe. For example, the allocation of the radio resource of the uplink subframe having the subframe number 2 to the terminal device 200 is notified to the terminal device 200 in the downlink subframe having the subframe number 7.

This makes it possible to define various subframe configurations, for example.

<4.2. Terminal device configuration >>
An example of the configuration of the terminal device 200 according to the embodiment of the present disclosure will be described with reference to FIGS. FIG. 20 is a block diagram illustrating an exemplary configuration of the terminal device 200 according to an embodiment of the present disclosure. Referring to FIG. 20, the terminal device 200 includes an antenna unit 210, a wireless communication unit 220, a storage unit 230, and a processing unit 240.

(Antenna unit 210)
The antenna unit 210 radiates the signal output from the wireless communication unit 220 to the space as a radio wave. Further, the antenna unit 210 converts a radio wave in the space into a signal and outputs the signal to the wireless communication unit 220.

(Wireless communication unit 220)
The wireless communication unit 220 transmits and receives signals. For example, the radio communication unit 220 receives a downlink signal from the base station and transmits an uplink signal to the base station. Note that the radio communication unit 220 does not simultaneously receive a downlink signal and transmit an uplink signal. Hereinafter, an example of hardware included in the wireless communication unit 220 will be described with reference to FIG.

FIG. 21 is an explanatory diagram for describing an example of hardware included in the wireless communication unit 220 of the terminal device 200 according to the embodiment of the present disclosure. Referring to FIG. 21, an antenna 201 included in the antenna unit 210, an FDD reception circuit 211, an FDD transmission circuit 213, a local oscillator 215, and a switch 217 included in the wireless communication unit 220 are illustrated. When the terminal device 200 receives a downlink signal, the frequency of the local oscillator 215 is set to the frequency of the downlink band, and the switch 217 connects the antenna 201 to the FDD reception circuit 211. When the terminal device 200 transmits an uplink signal, the frequency of the local oscillator 215 is set to the frequency of the uplink band, and the switch 217 connects the antenna 201 to the FDD transmission circuit 213.

(Storage unit 230)
The storage unit 230 temporarily or permanently stores a program and data for the operation of the terminal device 200.

(Processing unit 240)
The processing unit 240 provides various functions of the terminal device 200. The processing unit 240 includes an information acquisition unit 241 and a control unit 243. Note that the processing unit 240 may further include other components other than these components. That is, the processing unit 240 can perform operations other than the operations of these components.

(Information acquisition unit 241)
The information acquisition unit 241 is a subframe configuration that determines an uplink subframe and a downlink subframe for wireless communication using HD-FDD, and indicates the subframe configuration that the base station 100 notifies to the terminal device 200. Get information.

For example, as described above, the base station 100 notifies the terminal device 200 of the subframe configuration. Then, information indicating the subframe configuration is stored in the storage unit 230. At any later timing, the information acquisition unit 241 acquires the information indicating the subframe configuration from the storage unit 230.

(Control unit 243)
(A) Control of radio communication according to subframe configuration The control unit 243 controls radio communication in HD-FDD with the base station 100 by the terminal device 200 according to the subframe configuration. Thereby, for example, it becomes possible to allocate radio resources more flexibly to the terminal device 200 that performs radio communication using HD-FDD.

(A-1) Transmission / reception switching in a specific subframe For example, the control unit 243 receives downlink reception by the terminal apparatus 200 in a specific subframe between the uplink subframe and the down subframe having the above subframe configuration. And uplink transmission.

-Specific subframe example For example, the subframe configuration is a TDD UL / DL configuration. In this case, the specific subframe includes a special subframe and a subframe (uplink subframe or downlink subframe) immediately after the uplink subframe and immediately before the downlink subframe. Note that, as described above, the subframe configuration may be another subframe configuration different from the TDD UL / DL configuration.

Referring to FIG. 12 again, for example, when the subframe configuration is configuration 3, the control unit 243 controls the special subframe whose subframe number is 1 and the downlink subframe whose subframe number is 5 Then, switching between downlink reception and uplink transmission is performed. For example, when the subframe configuration is configuration 4, the control unit 243 performs downlink reception and uplink in a special subframe having a subframe number of 1 and a downlink subframe having a subframe number of 4. Switch to link transmission. For example, when the subframe configuration is configuration 5, the control unit 243 performs downlink reception and uplink in a special subframe with a subframe number of 1 and a downlink subframe with a subframe number of 3. Switch to link transmission.

Referring to FIG. 13 again, for example, when the subframe configuration is configuration X, the control unit 243 switches between downlink reception and uplink transmission in subframes with subframe numbers 1 and 6. I do.

-Switching For example, the control unit 243 performs the above switching under the control of the wireless communication unit 220. Referring to FIG. 21 again, for example, the control unit 243 performs the switching by instructing (for example, the wireless communication unit 120) to change the frequency of the local oscillator 215 and the connection destination of the switch 217.

For example, the control unit 243 changes the frequency of the local oscillator 215 from the frequency of the downlink band to the frequency of the uplink band, and changes the connection destination of the switch 217 from the FDD reception circuit 211 to the FDD transmission circuit 213. The communication unit 120 is instructed. Thereby, the radio | wireless communication of the terminal device 200 switches from downlink reception to uplink transmission.

For example, the control unit 243 changes the frequency of the local oscillator 215 from the frequency of the uplink band to the frequency of the downlink band, and changes the connection destination of the switch 217 from the FDD transmission circuit 213 to the FDD reception circuit 211. The communication unit 120 is instructed. Thereby, the radio | wireless communication of the terminal device 200 switches from uplink transmission to downlink reception.

As described above, switching between downlink reception and uplink transmission by the terminal device 200 is performed in the specific subframe. Thereby, for example, the terminal device 200 can actually perform wireless communication in accordance with the configuration.

(A-2) Transmission / Reception in Other Subframes For example, the control unit 243 causes the terminal device 200 to perform downlink reception or uplink transmission in another subframe different from the specific subframe. 200 controls the HD-FDD wireless communication with the base station 100.

-Downlink subframe For example, the control unit 243 is configured so that the terminal device 200 performs downlink reception in the downlink band in the downlink subframe having the subframe configuration different from the specific subframe. The wireless communication by the device 200 is controlled.

For example, the control unit 243 checks whether there is radio resource allocation to the terminal device 200 from scheduling information transmitted on a downlink channel control channel (for example, PDCCH) in the downlink subframe having the subframe configuration. To do.

For example, when the radio resource of the downlink subframe (the radio resource of the downlink band) is allocated to the terminal device 200, the control unit 243 receives a downlink signal transmitted using the radio resource ( For example, demodulation and decoding).

For example, when the radio resource of the uplink subframe (uplink band radio resource) is allocated to the terminal apparatus 200, the control unit 243 performs scheduling information indicating the allocation of the radio resource to the terminal apparatus 200. Is stored in the storage unit 230.

-Uplink subframe For example, the control unit 243 is configured so that the terminal apparatus 200 performs uplink transmission in the uplink band in an uplink subframe having the subframe configuration different from the specific subframe. The wireless communication by the device 200 is controlled.

For example, when the radio resource of the uplink subframe (the radio resource of the uplink band) is allocated to the terminal device 200, the control unit 243 performs uplink signal transmission processing (for example, the radio resource) Mapping of the uplink signal to the radio resource).

Note that, for example, the base station 100 notifies the terminal device 200 of the radio resource allocation of the uplink subframe with the subframe configuration in the downlink subframe with the subframe configuration. In this case, for example, the control unit 243 uses the radio resource allocation of the uplink subframe as the radio resource allocation of an uplink subframe that is not a subframe four subframes after the downlink subframe. May be.

Referring to FIG. 19 again, for example, the terminal device 200 is notified of the allocation of the radio resource of the uplink subframe in the downlink subframe of the configuration X. Then, the terminal device 200 (the control unit 243) uses the allocation of the radio resource of the uplink subframe as the allocation of the radio resource of the uplink subframe after 5 subframes of the downlink subframe. Also good.

As a specific example, the terminal device 200 (the control unit 243) is notified of the allocation of the radio resource of the uplink subframe in the downlink subframe whose subframe number is 7. Then, the terminal device 200 (control unit 243) may use the assignment of the radio resource of the uplink subframe as the assignment of the radio resource of the uplink subframe whose subframe number is 2.

This makes it possible to define various subframe configurations, for example.

(A-3) Execution of retransmission request process For example, the control unit 243 determines that the ACK / NACK for the downlink data transmitted by the base station 100 according to the subframe configuration is an uplink subframe with the subframe configuration. The retransmission request process is executed so that the data is transmitted to 100.

For example, the retransmission request process is a HARQ process.

For example, the control unit 243 receives ACK / NACK for the uplink data and transmits ACK / NACK for the downlink data in an ACK / NACK transmission subframe suitable for the subframe configuration. As described above, the retransmission request process is executed. Accordingly, for example, as described with reference to FIGS. 15 to 18, ACK / NACK for downlink data transmitted by the base station 100 is transmitted in the uplink subframe. For example, a subframe for ACK / NACK transmission suitable for the subframe configuration is predetermined for the subframe configuration. Alternatively, the terminal apparatus 200 may be notified by the base station 100 of an ACK / NACK transmission subframe suitable for the subframe configuration.

Thereby, for example, the base station 100 can receive ACK / NACK for downlink data.

The uplink subframe in which the ACK / NACK is transmitted may include a subframe other than a subframe that is four subframes after the downlink subframe in which the downlink data is transmitted. For example, in the example described with reference to FIGS. 15 to 18, an uplink subframe in which ACK / NACK for downlink data is transmitted is four subframes of the downlink subframe in which the downlink data is transmitted. Subframes other than the subsequent subframe are included.

Thereby, ACK / NACK transmission / reception can be performed more flexibly without being bound by the existing premise of FDD.

(B) Capability Notification For example, the control unit 243 has a capability for the terminal device 200 to perform wireless communication according to a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD. The base station 100 is notified that it is a device.

Specifically, for example, the control unit 243 transmits a UE capability information message indicating that the terminal device 200 has the capability to the base station 100 via the antenna unit 210 and the wireless communication unit 220.

Thereby, for example, the base station 100 can identify the terminal device 200 as a terminal device that should perform wireless communication according to the subframe configuration.

<< 5. Process flow >>
Subsequently, an example of processing of the base station 100 and the terminal device 200 according to the embodiment of the present disclosure will be described with reference to FIG. 22 to FIG.

(Processing of base station 100)
FIG. 22 is a flowchart illustrating an example of a schematic flow of a process of the base station 100 according to the embodiment of the present disclosure.

The selection unit 151 acquires capability information indicating the capability of the terminal device (S401).

The terminal device is a device that performs HD-FDD wireless communication (S403: YES), and the terminal device is a device that has the capability of performing HD-FDD wireless communication according to the subframe configuration (S405: If YES, the selection unit 151 selects a subframe configuration for the terminal device (that is, the terminal device 200) (S407).

Then, the information acquisition unit 153 acquires information indicating the subframe configuration, and the control unit 155 notifies the terminal device of the subframe configuration (S409). Then, the process ends.

When the terminal device is not a device that performs HD-FDD wireless communication (S403: NO), and when the terminal device is a device that does not have the capability (S405: NO), the process is as follows. finish.

(Processing of terminal device 200)
(A) First Process FIG. 23 is a flowchart illustrating an example of a schematic flow of a first process of the terminal device 200 according to the embodiment of the present disclosure. The first process is a process from cell search to reception of a subframe configuration.

The terminal device 200 holds in advance a list of frequencies that are subject to cell search. Therefore, the terminal device 200 receives a downlink signal according to the list, and detects a synchronization signal included in the received downlink signal (S421). For example, the synchronization signal is PSS and SSS. Based on the synchronization signal, the terminal device 200 acquires downlink synchronization and acquires a cell ID (S423).

Furthermore, the terminal device 200 receives system information (S425). The system information is MIB and SIB. The terminal device 200 acquires a random access parameter from the system information (S427).

Then, the terminal device 200 performs a random access procedure (S429).

Furthermore, in response to a request from the base station 100, the terminal device 200 transmits capability information indicating the capability of the terminal device 200 to the base station 100 (S431). For example, the capability information is a UE capability information message. The terminal device 200 notifies the base station 100 that the terminal device 200 supports only HD (HD-FDD) by transmitting the capability information. Also, the terminal device 200 transmits the capability information according to the subframe configuration (that is, the subframe configuration in which an uplink subframe and a downlink subframe for HD-FDD wireless communication are performed). The base station 100 is notified that the apparatus has the capability of performing wireless communication.

Thereafter, the base station 100 transmits information indicating the subframe configuration to the terminal device 200, and the terminal device 200 receives the information (S433). In addition, the information is stored in the storage unit 230, for example. Then, the process ends.

Note that, after the above process is completed, the terminal device 200 (information acquisition unit 241) acquires the information indicating the subframe configuration from the storage unit 230. Then, the terminal device 200 (the control unit 243) performs wireless communication using HD-FDD according to the subframe configuration.

(B) Second Process FIG. 24 is a flowchart illustrating an example of a schematic flow of a second process of the terminal device 200 according to the embodiment of the present disclosure. The second process is a wireless communication process using the HDD-FDD.

When the subframe is a downlink subframe (different from the specific subframe) (S441: YES), the terminal device 200 receives the downlink signal (S443). The said downlink signal contains the signal of the downlink control information transmitted with a control channel (for example, PDCCH).

When there is uplink scheduling information for the terminal device 200 in the downlink control information (S445: YES), the terminal device 200 stores the uplink scheduling information (S447).

If there is downlink scheduling information for the terminal device 200 in the downlink control information (S449: YES), the terminal device 200 performs a process of receiving downlink data addressed to the terminal device 200 (S451). ). Then, the next subframe is targeted (S453), and the process returns to step S441.

The subframe is not a downlink subframe (S441: NO), is an uplink subframe (different from a specific subframe) (S455: YES), and the terminal device 200 transmits uplink data. If it is a frame (S457: YES), the terminal device 200 transmits uplink data (S459). Then, the next subframe is targeted (S453), and the process returns to step S441.

When the subframe is not an uplink subframe (that is, a specific subframe) (S455: NO), the terminal device 200 performs switching between downlink reception and uplink transmission (S461). Then, the next subframe is targeted (S453), and the process returns to step S441.

<< 6. Modification >>
Subsequently, first to fifth modifications of the embodiment of the present disclosure will be described with reference to FIGS. 25 to 30.

In the modification of the embodiment of the present disclosure, the terminal device 200 that performs radio communication using HD-FDD transmits ACK / NACK for downlink data transmitted to the terminal device 200 in the secondary cell of carrier aggregation, as the carrier aggregation. Transmit in the primary cell.

Note that the first to fifth modifications of the embodiment of the present disclosure are related to the selection of the primary cell (Pcell), the secondary cell (Scell), and the subframe configuration (SC) of the primary cell and the secondary cell. It is characterized as follows.

In the first modification, the primary cell and the secondary cell of the terminal device 200 are component carriers (CC) of the base station 100. The terminal device 200 performs wireless communication with the base station 100 in both the primary cell and the secondary cell. For example, the base station 100 selects both the subframe configuration of the primary cell and the subframe configuration of the secondary cell.

In the second to fifth modifications, the primary cell of the terminal device 200 is a macro cell CC, and the secondary cell of the terminal device 200 is a small cell CC. The terminal device 200 performs wireless communication with a macro cell base station in a primary cell, and performs wireless communication with a small cell base station in a secondary cell.

In the second and third modifications, the macro cell is the cell 10 of the base station 100, and the small cell is a cell of another base station. In the second modification, the subframe configuration of the primary cell is selected according to the subframe configuration of the secondary cell. In the third modification, the subframe configuration of the secondary cell is selected according to the subframe configuration of the primary cell.

In the fourth modification and the fifth modification, the macro cell is a cell of another base station, and the small cell is the cell 10 of the base station 100. In the fourth modification, the subframe configuration of the secondary cell is selected according to the subframe configuration of the primary cell. In the fifth modification, the subframe configuration of the primary cell is selected according to the subframe configuration of the secondary cell.

<6.1. Features common to modifications>
First, features common to the first to fifth modifications will be described with reference to FIGS.

(Terminal device 200)
In the modification of the embodiment of the present disclosure, the terminal device 200 supports carrier aggregation. That is, the terminal device 200 can perform wireless communication simultaneously with a plurality of CCs. The plurality of CCs include one primary cell and one or more secondary cells.

For example, the terminal device 200 performs wireless communication simultaneously in the primary cell and the secondary cell. Further, the terminal device 200 transmits ACK / NACK for downlink data transmitted to the terminal device 200 in the secondary cell in the primary cell.

(Subframe configuration)
(A) Subframe configuration notified by base station 100 to terminal device 200 As described above, the base station 100 (control unit 155) performs the subframe configuration (that is, uplink for wireless communication in HD-FDD). The terminal apparatus 200 is notified of the subframe configuration defining the subframe and the downlink subframe).

In the modification of the embodiment of the present disclosure, the subframe configuration notified from the base station 100 (the control unit 155) to the terminal device 200 includes the subframe configuration of the primary cell of the terminal device 200 and the secondary cell of the terminal device 200. At least one of the subframe configurations is included.

(B) Relationship between the subframe configuration of the primary cell and the subframe configuration of the secondary cell Further, particularly in the modified example of the embodiment of the present disclosure, the subframe configuration of the primary cell is in accordance with the subframe configuration of the secondary cell. A subframe in which ACK / NACK for transmitted downlink data is transmitted is defined as an uplink subframe. Thereby, for example, the terminal device 200 can transmit the ACK / NACK in the primary cell.

For example, the subframe configuration of the primary cell defines all subframes defined as uplink subframes by the subframe configuration of the secondary cell as uplink subframes. Any subframe in which the ACK / NACK is transmitted is a subframe determined by the subframe configuration of the secondary cell as an uplink subframe. Therefore, the terminal device 200 can transmit the ACK / NACK in the primary cell regardless of which subframe specifically transmits the ACK / NACK.

As an example, the subframe configuration of the primary cell is the same as the subframe configuration of the secondary cell. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 25 is an explanatory diagram for describing a first example of transmission of ACK / NACK according to a modification of the embodiment of the present disclosure. Referring to FIG. 25, uplink and downlink situations are shown for the primary cell (Pcell) and the secondary cell (Scell) of the terminal device 200. In this example, the secondary cell is a TDD CC and the primary cell is an FDD CC. In this example, the subframe configuration of the primary cell and the subframe configuration of the secondary cell are the configuration 3 that is the UL / DL configuration of TDD. The terminal device 200 transmits ACK / NACK for downlink data transmitted according to configuration 3 in the secondary cell in a subframe for ACK / NACK transmission corresponding to configuration 3. That is, the terminal apparatus 200 transmits the ACK / NACK in the uplink subframe of configuration 3 (subframes whose subframe numbers are 2, 3, and 4). Furthermore, in the case of carrier aggregation, the terminal device 200 needs to transmit the ACK / NACK in the primary cell. In this example, since the subframe configuration of the primary cell is also configuration 3, the subframe for ACK / NACK transmission is also an uplink subframe in the primary cell. As an example, in the secondary cell, in a subframe having a subframe number of 9, downlink data is transmitted to the terminal device 200, and the terminal device 200 receives the downlink data. Then, terminal apparatus 200 transmits ACK / NACK for the downlink data in the next subframe (uplink subframe) having a subframe number of 4 in the primary cell. Thus, the ACK / NACK is appropriately transmitted in the primary cell.

Of course, the subframe configuration of the primary cell may not be the same as the subframe configuration of the secondary cell. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 26 is an explanatory diagram for describing a second example of ACK / NACK transmission according to a modification of the embodiment of the present disclosure. If FIG. 26 is referred, the condition of the uplink and the downlink about the primary cell (Pcell) and the secondary cell (Scell) of the terminal device 200 is shown. In this example, the secondary cell is a TDD CC and the primary cell is an FDD CC. In this example, the subframe configuration of the primary cell is a configuration 3 that is a UL / DL configuration of TDD. The subframe configuration of the secondary cell is configuration 2 which is a TDD UL / DL configuration. The terminal device 200 transmits ACK / NACK for downlink data transmitted according to configuration 2 in the secondary cell in a subframe for ACK / NACK transmission corresponding to configuration 2. That is, the terminal device 200 transmits the ACK / NACK in a subframe having a subframe number of 2 (uplink subframe of configuration 2). Furthermore, in the case of carrier aggregation, the terminal device 200 needs to transmit the ACK / NACK in the primary cell. In this example, the subframe configuration of the primary cell is configuration 3, and the ACK / NACK transmission subframe (that is, the subframe having a subframe number of 2) is also uplinked in the primary cell. It is a subframe. For example, in the secondary cell, in the subframe whose subframe number is 0, 1, 3, 4, 5, 6, 8, or 9, downlink data is transmitted to the terminal device 200. The downlink data is received. Then, terminal apparatus 200 transmits ACK / NACK for the downlink data in the next subframe (uplink subframe) having a subframe number of 2 in the primary cell. Thus, the ACK / NACK is appropriately transmitted in the primary cell.

(C) Subframe in which ACK / NACK is transmitted The ACK / NACK (that is, ACK / NACK for downlink data transmitted according to the subframe configuration of the secondary cell) is transmitted in the subframe It is predetermined for the subframe configuration of the secondary cell.

As a first example, the secondary cell is a TDD cell, and the subframe configuration of the secondary cell is a TDD UL / DL configuration. In this case, the subframe in which the ACK / NACK is transmitted is a subframe for ACK / NACK transmission that is predetermined for UL / DL configuration.

As a second example, the secondary cell is an FDD cell, and the subframe configuration of the secondary cell is a TDD UL / DL configuration. Also in this case, for example, the subframe in which the ACK / NACK is transmitted is a subframe for ACK / NACK transmission that is predetermined for the UL / DL configuration.

As a third example, the secondary cell is an FDD cell, and the subframe configuration of the secondary cell is another configuration different from the TDD UL / DL configuration. In this case, the subframe in which the ACK / NACK is transmitted is predetermined for the other configuration.

As described above, for example, the subframe in which the ACK / NACK is transmitted is predetermined for the subframe configuration. Accordingly, the subframe configuration of the primary cell and the subframe of the secondary cell are determined such that the subframe configuration of the primary cell defines the subframe in which the ACK / NACK is transmitted as an uplink subframe. It becomes possible to flexibly select the other according to one of the configurations.

<6.2. First Modification>
Next, a first modification example of the embodiment of the present disclosure will be described with reference to FIG.

(Primary cell and secondary cell)
In the first modification, the primary cell and the secondary cell of the terminal device 200 are CCs of the same base station. That is, the primary cell and the secondary cell are CCs of the base station 100.

For example, the primary cell and the secondary cell are FDD CCs. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 27 is an explanatory diagram for describing a first example of a primary cell and a secondary cell. Referring to FIG. 27, two pairs of FDD uplink CC and downlink CC are shown. For example, the primary cell of the terminal device 200 is one of the two pairs, and the secondary cell of the terminal device 200 is the other of the two pairs.

(Base station 100: selection unit 151)
As described above, the selection unit 151 selects a subframe configuration (that is, a subframe configuration that determines an uplink subframe and a downlink subframe for wireless communication using HD-FDD).

In the first modification, the subframe configuration includes the primary cell subframe configuration and the secondary cell subframe configuration. That is, the selection unit 151 selects the subframe configuration of the primary cell of the terminal apparatus 200 and the subframe configuration of the secondary cell of the terminal apparatus 200.

In particular, the selection unit 151 uses, as an uplink subframe, a subframe in which the ACK / NACK for downlink data transmitted according to the subframe configuration of the primary cell is transmitted according to the subframe configuration of the secondary cell. As defined, the subframe configuration of the primary cell and the subframe configuration of the secondary cell are selected.

(Base station 100: Information acquisition unit 153)
As described above, the information acquisition unit 153 acquires information indicating a subframe configuration (that is, subframe configuration information).

In the first modification, the subframe configuration includes the primary cell subframe configuration and the secondary cell subframe configuration. That is, the information acquisition unit 153 acquires subframe configuration information indicating the subframe configuration of the primary cell of the terminal apparatus 200 and subframe configuration information indicating the subframe configuration of the secondary cell of the terminal apparatus 200.

(Base station 100: control unit 155)
As described above, the control unit 155 notifies the terminal device 200 of the subframe configuration.

In the first modification, the subframe configuration includes the primary cell subframe configuration and the secondary cell subframe configuration. That is, the control unit 155 notifies the terminal device 200 of the subframe configuration of the primary cell of the terminal device 200. Further, the control unit 155 notifies the terminal device 200 of the subframe configuration of the secondary cell of the terminal device 200.

For example, as described above, the control unit 155 controls the radio communication according to the subframe configuration (for example, execution of a retransmission request process, allocation of radio resources, for each of the primary cell and the secondary cell, And / or notification of radio resource allocation).

The first modification has been described above. According to the first modification, even when carrier aggregation is performed, ACK / NACK for downlink data can be appropriately transmitted.

<6.3. Second Modification>
Next, a second modification example of the embodiment of the present disclosure will be described with reference to FIGS.

(Primary cell and secondary cell)
(A) Macro cell and small cell In the 2nd modification, the primary cell of the terminal device 200 is CC of a macro cell, and the secondary cell of the terminal device 200 is CC of the small cell which overlaps with the said macro cell.

Furthermore, the base station of the macro cell is the base station 100, and the base station of the small cell is another base station. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 28 is an explanatory diagram for explaining an example of a macro cell and a small cell in the second modification. Referring to FIG. 28, a base station 100, a cell 10 of the base station 100, a base station 30, a cell 40 of the base station 30, and a terminal device 200 are illustrated. The cell 10 is a macro cell, and the base station 100 is a base station of the macro cell. The cell 40 is a small cell that overlaps the cell 10 (macro cell), and the base station 30 is a base station of the small cell. The terminal device 200 performs radio communication with the base station 100 in the primary cell that is the CC of the cell 10 (macro cell), and performs radio communication with the base station 30 in the secondary cell that is the CC of the cell 40 (small cell). Do.

(B) Duplex system (b-1) Primary cell In the second modification, the primary cell is a CC of the cell 10 (macro cell) of the base station 100, and therefore the primary cell is a CC of FDD. .

(B-2) Secondary cell-First example: TDD
As a first example, the secondary cell is a TDD CC. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 29 is an explanatory diagram for describing a second example of the primary cell and the secondary cell. Referring to FIG. 29, an FDD uplink CC and downlink CC pair and a TDD CC are shown. For example, the primary cell of the terminal device 200 is a pair of FDD uplink CC and downlink CC, and the secondary cell of the terminal device 200 is a TDD CC.

Note that the subframe configuration of the secondary cell is a TDD UL / DL configuration.

-Second example: FDD
As a second example, the secondary cell may be a CC of FDD.

Referring to FIG. 27 again, the primary cell of the terminal device 200 may be one of two pairs of FDD uplink CC and downlink CC, and the secondary cell of the terminal device 200 is the other of the two pairs. It may be.

Note that the subframe configuration of the secondary cell may be a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD. The subframe configuration may be a UL / DL configuration of TDD, or may be another configuration different from the UL / DL configuration of TDD.

(Base station 100: selection unit 151)
As described above, the selection unit 151 selects a subframe configuration (that is, a subframe configuration that determines an uplink subframe and a downlink subframe for wireless communication using HD-FDD).

In the second modification, the subframe configuration is the subframe configuration of the primary cell. That is, the selection unit 151 selects the subframe configuration of the primary cell of the terminal device 200.

In particular, the selection unit 151 selects the subframe configuration (that is, the subframe configuration of the primary cell) according to the subframe configuration of the secondary cell. That is, the selection unit 151 sets, as an uplink subframe, a subframe in which the ACK / NACK for downlink data transmitted according to the subframe configuration of the primary cell is transmitted according to the subframe configuration of the secondary cell. As defined, the subframe configuration of the primary cell is selected.

As an example, as described with reference to FIG. 25, when the subframe configuration of the secondary cell is configuration 3, the selection unit 151 selects configuration 3 as the subframe configuration of the primary cell. To do. As another example, as described with reference to FIG. 26, when the subframe configuration of the secondary cell is configuration 2, the selection unit 151 sets configuration 3 as the subframe configuration of the primary cell. Select.

Note that, for example, the base station 100 acquires information indicating the subframe configuration of the secondary cell from the base station 30.

(Base station 100: Information acquisition unit 153)
As described above, the information acquisition unit 153 acquires information indicating a subframe configuration (that is, subframe configuration information).

In the second modification, the subframe configuration is the subframe configuration of the primary cell. That is, the information acquisition unit 153 acquires subframe configuration information indicating the subframe configuration of the primary cell of the terminal device 200.

(Base station 100: control unit 155)
As described above, the control unit 155 notifies the terminal device 200 of the subframe configuration.

In the second modification, the subframe configuration is the subframe configuration of the primary cell. That is, the control unit 155 notifies the terminal device 200 of the subframe configuration of the primary cell of the terminal device 200.

For example, as described above, the control unit 155 controls the radio communication according to the subframe configuration (for example, execution of a retransmission request process, allocation of radio resources, and / or radio resources) for the primary cell. Notification of allocation).

The second modification has been described above. According to the second modification, ACK / NACK for downlink data can be appropriately transmitted even when carrier aggregation is performed between base stations. Further, according to the second modification, the subframe configuration of the secondary cell can be selected flexibly.

<6.4. Third Modification>
Next, a third modification of the embodiment of the present disclosure will be described.

(Primary cell and secondary cell)
(A) Macro cell and small cell The description about a macro cell and a small cell does not have a difference between a 2nd modification and a 3rd modification. Therefore, the overlapping description is omitted here.

(B) Duplex method The description of the duplex method of the primary cell and the secondary cell is not different between the second modification and the third modification. Therefore, the overlapping description is omitted here.

(Base station 100: control unit 155)
In the third modification, the control unit 155 controls selection of the subframe configuration of the secondary cell according to the subframe configuration (that is, the subframe configuration of the primary cell).

For example, the base station 30 (small cell base station) selects the subframe configuration of the secondary cell. In this case, the control unit 155 controls selection of the subframe configuration of the secondary cell by the base station 30. Specifically, for example, the control unit 155 provides the base station 30 with subframe configuration information indicating the subframe configuration (that is, the subframe configuration of the primary cell). As a result, the base station 30 selects the subframe configuration of the secondary cell according to the subframe configuration.

As an example, as described with reference to FIG. 25, when the subframe configuration (that is, the subframe configuration of the primary cell) is the configuration 3, the control unit 155 indicates the configuration 3. The subframe configuration information is provided to the base station 30. As a result, the base station 30 selects the configuration 3 as the subframe configuration of the secondary cell. As another example, as described with reference to FIG. 26, when the subframe configuration (that is, the subframe configuration of the primary cell) is the configuration 3, the control unit 155 performs the configuration 3 Is provided to the base station 30. As a result, the base station 30 selects the configuration 2 as the subframe configuration of the secondary cell.

For example, as described above, the control unit 155 may notify the subframe configuration and / or control wireless communication according to the subframe configuration (for example, execute a retransmission request process, Resource allocation and / or notification of radio resource allocation).

The third modification has been described above. According to the third modification, ACK / NACK for downlink data can be appropriately transmitted even when carrier aggregation is performed between base stations. Further, according to the third modification, the subframe configuration of the primary cell can be selected flexibly.

<6.5. Fourth Modification>
Next, a fourth modification example of the embodiment of the present disclosure will be described with reference to FIG.

(Primary cell and secondary cell)
(A) Macro cell and small cell In the 4th modification, the primary cell of the terminal device 200 is CC of a macro cell, and the secondary cell of the terminal device 200 is CC of the small cell which overlaps with the said macro cell.

Furthermore, the base station of the small cell is the base station 100, and the base station of the macro cell is another base station. Hereinafter, a specific example of this point will be described with reference to FIG.

FIG. 30 is an explanatory diagram for explaining an example of a macro cell and a small cell in the fourth modified example. Referring to FIG. 30, a base station 100, a cell 10 of the base station 100, a base station 50, a cell 60 of the base station 50, and a terminal device 200 are illustrated. The cell 60 is a macro cell, and the base station 50 is a macro cell base station. The cell 10 is a small cell overlapping the cell 60 (macro cell), and the base station 100 is a small cell base station. The terminal device 200 performs radio communication with the base station 50 in the primary cell that is the CC of the cell 60 (macro cell), and performs radio communication with the base station 100 in the secondary cell that is the CC of the cell 10 (small cell). Do.

(B) Duplex method (b-1) Secondary cell In the fourth modification, the secondary cell is a CC of the cell 10 (small cell) of the base station 100, so the secondary cell is a CC of the FDD. is there.

(B-2) Primary cell-First example: FDD
As a first example, the primary cell is a CC of FDD.

Referring to FIG. 27 again, for example, the primary cell of the terminal device 200 is one of two pairs of uplink CC and downlink CC of FDD, and the secondary cell of the terminal device 200 is the other of the above two pairs. is there.

Note that the subframe configuration of the primary cell is a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD. The subframe configuration may be a UL / DL configuration of TDD, or may be another configuration different from the UL / DL configuration of TDD.

Second example: TDD
As a second example, the primary cell may be a TDD CC.

29, for example, the primary cell of the terminal device 200 may be a TDD CC, and the secondary cell of the terminal device 200 may be a pair of an FDD uplink CC and a downlink CC. .

The subframe configuration of the primary cell may be a TDD UL / DL configuration.

(Base station 100: selection unit 151)
As described above, the selection unit 151 selects a subframe configuration (that is, a subframe configuration that determines an uplink subframe and a downlink subframe for wireless communication using HD-FDD).

In the fourth modification, the subframe configuration is the subframe configuration of the secondary cell. That is, the selection unit 151 selects the subframe configuration of the secondary cell of the terminal device 200.

In particular, the selection unit 151 selects the subframe configuration (that is, the subframe configuration of the secondary cell) according to the subframe configuration of the primary cell. That is, the selection unit 151 sets, as an uplink subframe, a subframe in which the ACK / NACK for downlink data transmitted according to the subframe configuration of the primary cell is transmitted according to the subframe configuration of the secondary cell. As defined, the subframe configuration of the secondary cell is selected.

As an example, as described with reference to FIG. 25, when the subframe configuration of the primary cell is configuration 3, the selection unit 151 sets configuration 3 as the subframe configuration of the secondary cell. select. As another example, as described with reference to FIG. 26, when the subframe configuration of the primary cell is the configuration 3, the selection unit 151 sets the configuration as the subframe configuration of the secondary cell. 2 is selected.

Note that, for example, the base station 100 acquires information indicating the subframe configuration of the primary cell from the base station 50.

(Base station 100: Information acquisition unit 153)
As described above, the information acquisition unit 153 acquires information indicating a subframe configuration (that is, subframe configuration information).

In the fourth modification, the subframe configuration is the subframe configuration of the secondary cell. That is, the information acquisition unit 153 acquires subframe configuration information indicating the subframe configuration of the secondary cell of the terminal device 200.

(Base station 100: control unit 155)
As described above, the control unit 155 notifies the terminal device 200 of the subframe configuration.

In the fourth modification, the subframe configuration is the subframe configuration of the secondary cell. That is, the control unit 155 notifies the terminal device 200 of the subframe configuration of the secondary cell of the terminal device 200.

For example, as described above, the control unit 155 controls the radio communication according to the subframe configuration (for example, execution of a retransmission request process, radio resource allocation, and / or radio resource allocation) for the secondary cell. Notification of allocation).

The fourth modification has been described above. According to the fourth modification, ACK / NACK for downlink data can be appropriately transmitted even when carrier aggregation is performed between base stations. Further, according to the fourth modification, the subframe configuration of the primary cell can be flexibly selected.

<6.6. Fifth Modification>
Next, a fifth modification example of the embodiment of the present disclosure will be described.

(Primary cell and secondary cell)
(A) Macro cell and small cell There is no difference between the fourth modification and the fifth modification in the description of the macro cell and the small cell. Therefore, the overlapping description is omitted here.

(B) Duplex method The description of the duplex method of the primary cell and the secondary cell is not different between the fourth modification and the fifth modification. Therefore, the overlapping description is omitted here.

(Base station 100: control unit 155)
In the fifth modification, the control unit 155 controls selection of the subframe configuration of the primary cell according to the subframe configuration (that is, the subframe configuration of the secondary cell).

For example, the base station 50 (macro cell base station) selects the subframe configuration of the primary cell. In this case, the control unit 155 controls selection of the subframe configuration of the primary cell by the base station 50. Specifically, for example, the control unit 155 provides the base station 50 with subframe configuration information indicating the subframe configuration (that is, the subframe configuration of the secondary cell). As a result, the base station 50 selects the subframe configuration of the primary cell according to the subframe configuration.

As an example, as described with reference to FIG. 25, when the subframe configuration (that is, the subframe configuration of the secondary cell) is the configuration 3, the control unit 155 indicates the configuration 3. The subframe configuration information is provided to the base station 50. As a result, the base station 50 selects the configuration 3 as the subframe configuration of the primary cell. As another example, as described with reference to FIG. 26, when the subframe configuration (that is, the subframe configuration of the secondary cell) is the configuration 2, the control unit 155 performs the configuration 2 Is provided to the base station 50. As a result, the base station 50 selects the configuration 3 as the subframe configuration of the primary cell.

For example, as described above, the control unit 155 reports the subframe configuration and / or controls wireless communication according to the subframe configuration (for example, execution of a retransmission request process, Resource allocation and / or notification of radio resource allocation).

The fifth modification has been described above. According to the fifth modification, ACK / NACK for downlink data can be appropriately transmitted even when carrier aggregation is performed between base stations. Further, according to the fifth modification, the subframe configuration of the secondary cell can be selected flexibly.

<< 7. Application example >>
The technology according to the present disclosure can be applied to various products. For example, the base station 100 may be realized as any type of eNB (evolved Node B) such as a macro eNB or a small eNB. The small eNB may be an eNB that covers a cell smaller than a macro cell, such as a pico eNB, a micro eNB, or a home (femto) eNB. Instead, the base station 100 may be realized as another type of base station such as a NodeB or a BTS (Base Transceiver Station). Base station 100 may include a main body (also referred to as a base station apparatus) that controls radio communication, and one or more RRHs (Remote Radio Heads) that are arranged at locations different from the main body. Further, various types of terminals described later may operate as the base station 100 by temporarily or semi-permanently executing the base station function. Furthermore, at least some components of the base station 100 may be realized in a base station apparatus or a module for the base station apparatus.

Further, for example, the terminal device 200 is a smartphone, a tablet PC (Personal Computer), a notebook PC, a portable game terminal, a mobile terminal such as a portable / dongle type mobile router or a digital camera, or an in-vehicle terminal such as a car navigation device. It may be realized as. The terminal device 200 may be realized as a terminal (also referred to as an MTC (Machine Type Communication) terminal) that performs M2M (Machine To Machine) communication. Furthermore, at least a part of the components of the terminal device 200 may be realized in a module (for example, an integrated circuit module configured by one die) mounted on these terminals.

<7.1. Application examples for base stations>
(First application example)
FIG. 31 is a block diagram illustrating a first example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied. The eNB 800 includes one or more antennas 810 and a base station device 820. Each antenna 810 and the base station apparatus 820 can be connected to each other via an RF cable.

Each of the antennas 810 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission and reception of radio signals by the base station apparatus 820. The eNB 800 includes a plurality of antennas 810 as illustrated in FIG. 31, and the plurality of antennas 810 may respectively correspond to a plurality of frequency bands used by the eNB 800, for example. Although FIG. 31 shows an example in which the eNB 800 has a plurality of antennas 810, the eNB 800 may have a single antenna 810.

The base station apparatus 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.

The controller 821 may be a CPU or a DSP, for example, and operates various functions of the upper layer of the base station apparatus 820. For example, the controller 821 generates a data packet from the data in the signal processed by the wireless communication interface 825, and transfers the generated packet via the network interface 823. The controller 821 may generate a bundled packet by bundling data from a plurality of baseband processors, and may transfer the generated bundled packet. In addition, the controller 821 is a logic that executes control such as radio resource control, radio bearer control, mobility management, inflow control, or scheduling. May have a typical function. Moreover, the said control may be performed in cooperation with a surrounding eNB or a core network node. The memory 822 includes RAM and ROM, and stores programs executed by the controller 821 and various control data (for example, terminal list, transmission power data, scheduling data, and the like).

The network interface 823 is a communication interface for connecting the base station device 820 to the core network 824. The controller 821 may communicate with the core network node or other eNB via the network interface 823. In that case, the eNB 800 and the core network node or another eNB may be connected to each other by a logical interface (for example, an S1 interface or an X2 interface). The network interface 823 may be a wired communication interface or a wireless communication interface for wireless backhaul. When the network interface 823 is a wireless communication interface, the network interface 823 may use a frequency band higher than the frequency band used by the wireless communication interface 825 for wireless communication.

The wireless communication interface 825 supports any cellular communication scheme such as LTE (Long Term Evolution) or LTE-Advanced, and provides a wireless connection to terminals located in the cell of the eNB 800 via the antenna 810. The wireless communication interface 825 may typically include a baseband (BB) processor 826, an RF circuit 827, and the like. The BB processor 826 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and each layer (for example, L1, MAC (Medium Access Control), RLC (Radio Link Control), and PDCP). Various signal processing of (Packet Data Convergence Protocol) is executed. The BB processor 826 may have some or all of the logical functions described above instead of the controller 821. The BB processor 826 may be a module that includes a memory that stores a communication control program, a processor that executes the program, and related circuits. The function of the BB processor 826 may be changed by updating the program. Good. Further, the module may be a card or a blade inserted into a slot of the base station apparatus 820, or a chip mounted on the card or the blade. On the other hand, the RF circuit 827 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 810.

The radio communication interface 825 includes a plurality of BB processors 826 as illustrated in FIG. 31, and the plurality of BB processors 826 may respectively correspond to a plurality of frequency bands used by the eNB 800, for example. In addition, the wireless communication interface 825 includes a plurality of RF circuits 827 as illustrated in FIG. 31, and the plurality of RF circuits 827 may correspond to, for example, a plurality of antenna elements, respectively. FIG. 31 shows an example in which the wireless communication interface 825 includes a plurality of BB processors 826 and a plurality of RF circuits 827. However, the wireless communication interface 825 includes a single BB processor 826 or a single RF circuit 827. But you can.

In the eNB 800 shown in FIG. 31, one or more components (selection unit 151, information acquisition unit 153, and / or control unit 155) included in the processing unit 150 described with reference to FIG. May be implemented. Alternatively, at least some of these components may be implemented in the controller 821. As an example, the eNB 800 includes a module including a part (for example, the BB processor 826) or all of the wireless communication interface 825 and / or the controller 821, and the one or more components are mounted in the module. Good. In this case, the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components). The program may be executed. As another example, a program for causing a processor to function as the one or more components is installed in the eNB 800, and the radio communication interface 825 (eg, the BB processor 826) and / or the controller 821 executes the program. Good. As described above, the eNB 800, the base station apparatus 820, or the module may be provided as an apparatus including the one or more components, and a program for causing a processor to function as the one or more components is provided. May be. In addition, a readable recording medium in which the program is recorded may be provided.

Further, in the eNB 800 illustrated in FIG. 31, the wireless communication unit 120 described with reference to FIG. 14 may be implemented in the wireless communication interface 825 (for example, the RF circuit 827). Further, the antenna unit 110 may be mounted on the antenna 810. The network communication unit 130 may be implemented in the controller 821 and / or the network interface 823.

(Second application example)
FIG. 32 is a block diagram illustrating a second example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied. The eNB 830 includes one or more antennas 840, a base station apparatus 850, and an RRH 860. Each antenna 840 and RRH 860 may be connected to each other via an RF cable. Base station apparatus 850 and RRH 860 can be connected to each other via a high-speed line such as an optical fiber cable.

Each of the antennas 840 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of radio signals by the RRH 860. The eNB 830 includes a plurality of antennas 840 as illustrated in FIG. 32, and the plurality of antennas 840 may respectively correspond to a plurality of frequency bands used by the eNB 830, for example. 32 shows an example in which the eNB 830 has a plurality of antennas 840, but the eNB 830 may have a single antenna 840.

The base station device 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855, and a connection interface 857. The controller 851, the memory 852, and the network interface 853 are the same as the controller 821, the memory 822, and the network interface 823 described with reference to FIG.

The wireless communication interface 855 supports a cellular communication method such as LTE or LTE-Advanced, and provides a wireless connection to a terminal located in a sector corresponding to the RRH 860 via the RRH 860 and the antenna 840. The wireless communication interface 855 may typically include a BB processor 856 and the like. The BB processor 856 is the same as the BB processor 826 described with reference to FIG. 31 except that the BB processor 856 is connected to the RF circuit 864 of the RRH 860 via the connection interface 857. The wireless communication interface 855 includes a plurality of BB processors 856 as illustrated in FIG. 32, and the plurality of BB processors 856 may respectively correspond to a plurality of frequency bands used by the eNB 830, for example. 32 shows an example in which the wireless communication interface 855 includes a plurality of BB processors 856, the wireless communication interface 855 may include a single BB processor 856.

The connection interface 857 is an interface for connecting the base station device 850 (wireless communication interface 855) to the RRH 860. The connection interface 857 may be a communication module for communication on the high-speed line that connects the base station apparatus 850 (wireless communication interface 855) and the RRH 860.

In addition, the RRH 860 includes a connection interface 861 and a wireless communication interface 863.

The connection interface 861 is an interface for connecting the RRH 860 (wireless communication interface 863) to the base station device 850. The connection interface 861 may be a communication module for communication on the high-speed line.

The wireless communication interface 863 transmits and receives wireless signals via the antenna 840. The wireless communication interface 863 may typically include an RF circuit 864 and the like. The RF circuit 864 may include a mixer, a filter, an amplifier, and the like, and transmits and receives wireless signals via the antenna 840. The wireless communication interface 863 includes a plurality of RF circuits 864 as shown in FIG. 32, and the plurality of RF circuits 864 may correspond to, for example, a plurality of antenna elements, respectively. 32 shows an example in which the wireless communication interface 863 includes a plurality of RF circuits 864, the wireless communication interface 863 may include a single RF circuit 864.

In the eNB 830 illustrated in FIG. 32, one or more components (selection unit 151, information acquisition unit 153, and / or control unit 155) included in the processing unit 150 described with reference to FIG. And / or may be implemented in the wireless communication interface 863. Alternatively, at least some of these components may be implemented in the controller 851. As an example, the eNB 830 includes a module including a part (for example, the BB processor 856) or the whole of the wireless communication interface 855 and / or the controller 851, and the one or more components are mounted in the module. Good. In this case, the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components). The program may be executed. As another example, a program for causing a processor to function as the one or more components is installed in the eNB 830, and the wireless communication interface 855 (eg, the BB processor 856) and / or the controller 851 executes the program. Good. As described above, the eNB 830, the base station apparatus 850, or the module may be provided as an apparatus including the one or more components, and a program for causing a processor to function as the one or more components is provided. May be. In addition, a readable recording medium in which the program is recorded may be provided.

32, for example, the wireless communication unit 120 described with reference to FIG. 14 may be implemented in the wireless communication interface 863 (for example, the RF circuit 864). The antenna unit 110 may be mounted on the antenna 840. The network communication unit 130 may be implemented in the controller 851 and / or the network interface 853.

<7.2. Application examples related to terminal devices>
(First application example)
FIG. 33 is a block diagram illustrating an example of a schematic configuration of a smartphone 900 to which the technology according to the present disclosure may be applied. The smartphone 900 includes a processor 901, a memory 902, a storage 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, one or more antenna switches 915. One or more antennas 916, a bus 917, a battery 918 and an auxiliary controller 919 are provided.

The processor 901 may be, for example, a CPU or a SoC (System on Chip), and controls the functions of the application layer and other layers of the smartphone 900. The memory 902 includes a RAM and a ROM, and stores programs executed by the processor 901 and data. The storage 903 can include a storage medium such as a semiconductor memory or a hard disk. The external connection interface 904 is an interface for connecting an external device such as a memory card or a USB (Universal Serial Bus) device to the smartphone 900.

The camera 906 includes, for example, an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and generates a captured image. The sensor 907 may include a sensor group such as a positioning sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 908 converts sound input to the smartphone 900 into an audio signal. The input device 909 includes, for example, a touch sensor that detects a touch on the screen of the display device 910, a keypad, a keyboard, a button, or a switch, and receives an operation or information input from a user. The display device 910 has a screen such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, and displays an output image of the smartphone 900. The speaker 911 converts an audio signal output from the smartphone 900 into audio.

The wireless communication interface 912 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication. The wireless communication interface 912 may typically include a BB processor 913, an RF circuit 914, and the like. The BB processor 913 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication. On the other hand, the RF circuit 914 may include a mixer, a filter, an amplifier, and the like, and transmits and receives radio signals via the antenna 916. The wireless communication interface 912 may be a one-chip module in which the BB processor 913 and the RF circuit 914 are integrated. The wireless communication interface 912 may include a plurality of BB processors 913 and a plurality of RF circuits 914 as illustrated in FIG. FIG. 33 shows an example in which the wireless communication interface 912 includes a plurality of BB processors 913 and a plurality of RF circuits 914. However, the wireless communication interface 912 includes a single BB processor 913 or a single RF circuit 914. But you can.

Furthermore, the wireless communication interface 912 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN (Local Area Network) method in addition to the cellular communication method. In that case, a BB processor 913 and an RF circuit 914 for each wireless communication method may be included.

Each of the antenna switches 915 switches the connection destination of the antenna 916 among a plurality of circuits (for example, circuits for different wireless communication systems) included in the wireless communication interface 912.

Each of the antennas 916 includes a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 912. The smartphone 900 may include a plurality of antennas 916 as illustrated in FIG. Note that although FIG. 33 illustrates an example in which the smartphone 900 includes a plurality of antennas 916, the smartphone 900 may include a single antenna 916.

Furthermore, the smartphone 900 may include an antenna 916 for each wireless communication method. In that case, the antenna switch 915 may be omitted from the configuration of the smartphone 900.

The bus 917 connects the processor 901, memory 902, storage 903, external connection interface 904, camera 906, sensor 907, microphone 908, input device 909, display device 910, speaker 911, wireless communication interface 912, and auxiliary controller 919 to each other. . The battery 918 supplies electric power to each block of the smartphone 900 shown in FIG. 33 through a power supply line partially shown by a broken line in the drawing. For example, the auxiliary controller 919 operates the minimum necessary functions of the smartphone 900 in the sleep mode.

In the smartphone 900 illustrated in FIG. 33, one or more components (the information acquisition unit 241 and the control unit 243) included in the processing unit 240 described with reference to FIG. 20 may be implemented in the wireless communication interface 912. Good. Alternatively, at least some of these components may be implemented in the processor 901 or the auxiliary controller 919. As an example, the smartphone 900 includes a module including a part (for example, the BB processor 913) or the whole of the wireless communication interface 912, the processor 901, and / or the auxiliary controller 919, and the one or more components in the module. May be implemented. In this case, the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components). The program may be executed. As another example, a program for causing a processor to function as the one or more components is installed in the smartphone 900, and the wireless communication interface 912 (eg, the BB processor 913), the processor 901, and / or the auxiliary controller 919 is The program may be executed. As described above, the smartphone 900 or the module may be provided as a device including the one or more components, and a program for causing a processor to function as the one or more components may be provided. In addition, a readable recording medium in which the program is recorded may be provided.

33, for example, the wireless communication unit 220 described with reference to FIG. 20 may be implemented in the wireless communication interface 912 (for example, the RF circuit 914). The antenna unit 210 may be mounted on the antenna 916.

(Second application example)
FIG. 34 is a block diagram illustrating an example of a schematic configuration of a car navigation device 920 to which the technology according to the present disclosure can be applied. The car navigation device 920 includes a processor 921, a memory 922, a GPS (Global Positioning System) module 924, a sensor 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, and wireless communication. The interface 933 includes one or more antenna switches 936, one or more antennas 937, and a battery 938.

The processor 921 may be a CPU or SoC, for example, and controls the navigation function and other functions of the car navigation device 920. The memory 922 includes RAM and ROM, and stores programs and data executed by the processor 921.

The GPS module 924 measures the position (for example, latitude, longitude, and altitude) of the car navigation device 920 using GPS signals received from GPS satellites. The sensor 925 may include a sensor group such as a gyro sensor, a geomagnetic sensor, and an atmospheric pressure sensor. The data interface 926 is connected to the in-vehicle network 941 through a terminal (not shown), for example, and acquires data generated on the vehicle side such as vehicle speed data.

The content player 927 reproduces content stored in a storage medium (for example, CD or DVD) inserted into the storage medium interface 928. The input device 929 includes, for example, a touch sensor, a button, or a switch that detects a touch on the screen of the display device 930, and receives an operation or information input from the user. The display device 930 has a screen such as an LCD or an OLED display, and displays a navigation function or an image of content to be reproduced. The speaker 931 outputs the navigation function or the audio of the content to be played back.

The wireless communication interface 933 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication. The wireless communication interface 933 may typically include a BB processor 934, an RF circuit 935, and the like. The BB processor 934 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication. On the other hand, the RF circuit 935 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 937. The wireless communication interface 933 may be a one-chip module in which the BB processor 934 and the RF circuit 935 are integrated. The wireless communication interface 933 may include a plurality of BB processors 934 and a plurality of RF circuits 935 as shown in FIG. 34 shows an example in which the wireless communication interface 933 includes a plurality of BB processors 934 and a plurality of RF circuits 935, the wireless communication interface 933 includes a single BB processor 934 or a single RF circuit 935. But you can.

Further, the wireless communication interface 933 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN method in addition to the cellular communication method. A BB processor 934 and an RF circuit 935 may be included for each communication method.

Each of the antenna switches 936 switches the connection destination of the antenna 937 among a plurality of circuits included in the wireless communication interface 933 (for example, circuits for different wireless communication systems).

Each of the antennas 937 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 933. The car navigation device 920 may include a plurality of antennas 937 as shown in FIG. FIG. 34 shows an example in which the car navigation device 920 includes a plurality of antennas 937, but the car navigation device 920 may include a single antenna 937.

Furthermore, the car navigation device 920 may include an antenna 937 for each wireless communication method. In that case, the antenna switch 936 may be omitted from the configuration of the car navigation device 920.

The battery 938 supplies power to each block of the car navigation device 920 shown in FIG. 34 via a power supply line partially shown by a broken line in the drawing. Further, the battery 938 stores electric power supplied from the vehicle side.

In the car navigation device 920 shown in FIG. 34, one or more components (information acquisition unit 241 and control unit 243) included in the processing unit 240 described with reference to FIG. 20 are implemented in the wireless communication interface 933. May be. Alternatively, at least some of these components may be implemented in the processor 921. As an example, the car navigation apparatus 920 includes a module including a part (for example, the BB processor 934) or the whole of the wireless communication interface 933 and / or the processor 921, and the one or more components are mounted in the module. May be. In this case, the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components). The program may be executed. As another example, a program for causing a processor to function as the one or more components is installed in the car navigation device 920, and the wireless communication interface 933 (eg, the BB processor 934) and / or the processor 921 executes the program. May be. As described above, the car navigation apparatus 920 or the module may be provided as an apparatus including the one or more components, and a program for causing a processor to function as the one or more components may be provided. Good. In addition, a readable recording medium in which the program is recorded may be provided.

34, for example, the radio communication unit 220 described with reference to FIG. 20 may be implemented in the radio communication interface 933 (for example, the RF circuit 935). The antenna unit 210 may be mounted on the antenna 937.

Also, the technology according to the present disclosure may be realized as an in-vehicle system (or vehicle) 940 including one or more blocks of the car navigation device 920 described above, an in-vehicle network 941, and a vehicle side module 942. That is, the in-vehicle system (or vehicle) 940 may be provided as a device that includes the one or more components included in the processing unit 240. The vehicle-side module 942 generates vehicle-side data such as vehicle speed, engine speed, or failure information, and outputs the generated data to the in-vehicle network 941.

<< 8. Summary >>
Up to this point, the apparatus and processing according to the embodiments of the present disclosure have been described with reference to FIGS.

According to the embodiment of the present disclosure, the base station 100 includes an information acquisition unit 153 that acquires information indicating a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication using HD-FDD; And a control unit 155 for notifying the terminal device 200 of the subframe configuration.

According to the embodiment of the present disclosure, the terminal device 200 has a subframe configuration that defines an uplink subframe and a downlink subframe for HD-FDD wireless communication, and the base station 100 includes the terminal device 200. An information acquisition unit 241 for acquiring information indicating the subframe configuration to be notified to the mobile station, and a control unit 243 for controlling HD-FDD wireless communication with the base station 100 by the terminal device 200 according to the subframe configuration. Prepare.

Thereby, for example, it becomes possible to allocate radio resources more flexibly to the terminal device 200 that performs radio communication using HD-FDD. More specifically, for example, the base station 100 can flexibly select a subframe configuration and share the subframe configuration with the terminal device 200. Therefore, radio resources are allocated to terminal device 200 in accordance with a flexibly selected subframe configuration. That is, radio resources can be flexibly allocated to the terminal device 200.

As mentioned above, although preferred embodiment of this indication was described referring an accompanying drawing, it cannot be overemphasized that this indication is not limited to the example concerned. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are of course within the technical scope of the present disclosure. Is done.

For example, although the example in which the base station that notifies the terminal device of the subframe configuration selects the subframe configuration has been described, the present disclosure is not limited to such an example. For example, the subframe configuration may be selected by another device (for example, a core network node or another base station).

Further, for example, although the example in which the communication system is a system compliant with LTE, LTE-Advanced, or a communication standard based on these has been described, the present disclosure is not limited to such an example. For example, the communication system may be a system that complies with other communication standards.

In addition, the processing steps in the processing of the present specification do not necessarily have to be executed in time series according to the order described in the flowchart or the sequence diagram. For example, the processing steps in the processing may be executed in an order different from the order described as a flowchart or a sequence diagram, or may be executed in parallel.

In addition, a processor (for example, a CPU, a DSP, or the like) included in a device of the present specification (for example, a base station, a base station device, a module for a base station device, or a terminal device or a module for a terminal device). Can also be created as a computer program (in other words, a computer program for causing the processor to execute the operation of the component of the device) as a component of the device (for example, an information acquisition unit and a control unit). is there. Moreover, a recording medium on which the computer program is recorded may be provided. An apparatus (for example, a finished product or a module for a finished product (a component, a processing circuit, a chip, or the like)) including a memory that stores the computer program and one or more processors that can execute the computer program May also be provided. In addition, a method including the operation of the components of the device (for example, an information acquisition unit and a control unit) is also included in the technology according to the present disclosure.

In addition, the effects described in the present specification are merely illustrative or illustrative, and are not limited. That is, the technology according to the present disclosure can exhibit other effects that are apparent to those skilled in the art from the description of the present specification in addition to or instead of the above effects.

The following configurations also belong to the technical scope of the present disclosure.
(1)
An acquisition unit that acquires information indicating a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD (Half Duplex Frequency Division Duplex);
A control unit for notifying the terminal device of the subframe configuration;
A device comprising:
(2)
The device according to (1), wherein the subframe configuration is a subframe configuration individually selected for the terminal device.
(3)
The device according to (1) or (2), wherein the control unit notifies the terminal device of the subframe configuration by individual signaling to the terminal device.
(4)
The control unit transmits ACK (Acknowledgement) / NACK (Negative Acknowledgement) for uplink data transmitted by the terminal device according to the subframe configuration to the terminal device in a downlink subframe having the subframe configuration. The apparatus according to any one of (1) to (3), wherein a process for requesting retransmission is executed as described above.
(5)
The apparatus according to (4), wherein the downlink subframe in which the ACK / NACK is transmitted includes a subframe other than a subframe that is four subframes after the uplink subframe in which the uplink data is transmitted. .
(6)
An ACK / NACK transmission subframe suitable for the subframe configuration is determined in advance, or
The control unit notifies the terminal device of a subframe for ACK / NACK transmission suitable for the subframe configuration;
The apparatus according to any one of (1) to (5).
(7)
The subframe for ACK / NACK transmission suitable for the subframe configuration includes a subframe in which ACK / NACK for downlink data transmitted according to the subframe configuration is transmitted,
The subframe in which ACK / NACK for the downlink data is transmitted is an uplink subframe having the subframe configuration.
The apparatus according to (6) above.
(8)
The subframe for ACK / NACK transmission suitable for the subframe configuration includes a subframe in which ACK / NACK for uplink data transmitted according to the subframe configuration is transmitted,
The subframe in which ACK / NACK for the uplink data is transmitted is a downlink subframe having the subframe configuration.
The device according to (6) or (7).
(9)
The control unit allocates radio resources of uplink subframes with the subframe configuration to the terminal apparatus in a downlink subframe that is not a subframe four subframes before the uplink subframe, and the terminal apparatus The device according to any one of (1) to (8), wherein
(10)
The terminal device is a device having the capability of performing wireless communication in accordance with a subframe configuration for performing uplink subframe and downlink subframe for wireless communication in HD-FDD. The apparatus of any one of Claims.
(11)
The control unit does not allocate radio resources of a specific subframe between an uplink subframe and a downlink subframe of the subframe configuration to the terminal apparatus, and radios of other subframes different from the specific subframe The device according to any one of (1) to (10), wherein a resource is allocated to the terminal device.
(12)
The other subframe includes an uplink subframe and a down subframe of the subframe configuration,
The radio resources of the other subframes are the radio resources of the uplink subframe of the subframe configuration and the radio resources of the subband configuration of the subband configuration of the uplink bandwidth radio resources. Including radio resources of downlink subframes,
The apparatus according to (11) above.
(13)
The apparatus according to any one of (1) to (12), wherein the subframe configuration is a subframe configuration selected from a plurality of subframe configurations.
(14)
The subframe configuration defines any one of the above (1) to (13), which defines an uplink subframe and a downlink subframe for the radio communication among a predetermined number of subframes included in the radio frame. The device according to item.
(15)
In the subframe configuration, a first number of subframes for the wireless communication among the predetermined number of subframes is defined as an uplink subframe, and the first number of subframes out of the predetermined number of subframes. The apparatus according to (14), wherein a second number of subframes different from the number of 1 is defined as a downlink subframe.
(16)
The said sub-frame structure is an apparatus as described in said (14) or (15) which defines the sub-frame by which a physical alerting | reporting channel is arrange | positioned among the said predetermined number of sub-frames as a downlink sub-frame.
(17)
The apparatus according to any one of (1) to (16), wherein the subframe configuration is a TDD uplink / downlink configuration.
(18)
The apparatus according to any one of (1) to (16), wherein the subframe configuration is another configuration different from an uplink / downlink configuration of TDD.
(19)
The terminal device supports carrier aggregation,
The subframe configuration includes at least one of a subframe configuration of a primary cell of the terminal device and a subframe configuration of a secondary cell of the terminal device,
The subframe configuration of the primary cell defines a subframe in which ACK / NACK for downlink data transmitted according to the subframe configuration of the secondary cell is transmitted as an uplink subframe.
The apparatus according to any one of (1) to (18).
(20)
The apparatus according to (19), wherein the subframe configuration of the primary cell defines all subframes defined as uplink subframes by the subframe configuration of the secondary cell as uplink subframes.
(21)
The apparatus according to (19) or (20), wherein the subframe configuration of the primary cell is the same as the subframe configuration of the secondary cell.
(22)
The apparatus according to any one of (19) to (21), wherein the subframe in which the ACK / NACK is transmitted is predetermined for the subframe configuration of the secondary cell.
(23)
The primary cell and the secondary cell are component carriers of the same base station,
The subframe configuration includes the subframe configuration of the primary cell and the subframe configuration of the secondary cell.
The apparatus according to any one of (19) to (22).
(24)
The primary cell is a component carrier of a macro cell,
The secondary cell is a small cell component carrier that overlaps the macro cell,
The subframe configuration is one subframe configuration of the primary cell and the secondary cell.
The apparatus according to any one of (19) to (22).
(25)
The other of the primary cell and the secondary cell is a TDD (Time Division Duplex) component carrier,
The other subframe configuration of the primary cell and the secondary cell is a TDD uplink / downlink configuration,
The apparatus according to (24) above.
(26)
The other of the primary cell and the secondary cell is an FDD component carrier,
The other subframe configuration of the primary cell and the secondary cell is a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD.
The apparatus according to (24) above.
(27)
The apparatus according to any one of (24) to (26), wherein the subframe configuration is a subframe configuration selected according to the other subframe configuration of the primary cell and the secondary cell.
(28)
The apparatus according to any one of (24) to (26), wherein the control unit controls selection of the other subframe configuration of the primary cell and the secondary cell according to the subframe configuration.
(29)
An acquisition unit that acquires information indicating the subframe configuration that the base station notifies the terminal device of a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD;
A control unit for controlling wireless communication in HD-FDD with the base station by the terminal device according to the subframe configuration;
A device comprising:
(30)
The control unit performs switching between downlink reception and uplink transmission by the terminal apparatus in a specific subframe between an uplink subframe and a downlink subframe with the subframe configuration, according to (29) above. Equipment.
(31)
The control unit is configured so that the terminal device is a device having a capability of performing wireless communication according to a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD. The device (32) according to (29) or (30), which notifies a station
The control unit performs a retransmission request process such that an ACK / NACK for downlink data transmitted by the base station according to the subframe configuration is transmitted to the base station in an uplink subframe having the subframe configuration. Run
The uplink subframe in which the ACK / NACK is transmitted includes a subframe other than a subframe four subframes after the downlink subframe in which the downlink data is transmitted.
The apparatus according to any one of (29) to (31).
(33)
The control unit allocates radio resources to uplink subframes in the subframe configuration, which are notified by the base station to the terminal apparatus in the downlink subframes in the subframe configuration. The apparatus according to any one of (29) to (32), wherein the apparatus is used for radio resource allocation of an uplink subframe that is not a subframe after the frame.
(34)
The apparatus according to any one of (1) to (28), wherein the apparatus is a base station, a base station apparatus for the base station, or a module for the base station apparatus.
(35)
Obtaining information indicating a subframe configuration defining an uplink subframe and a downlink subframe for wireless communication in HD-FDD (Half Duplex Frequency Division Duplex);
Notifying the terminal device of the subframe configuration by a processor;
Including methods.
(36)
Obtaining information indicating a subframe configuration defining an uplink subframe and a downlink subframe for wireless communication in HD-FDD (Half Duplex Frequency Division Duplex);
Notifying the terminal device of the subframe configuration;
A program that causes a processor to execute.
(37)
Obtaining information indicating a subframe configuration defining an uplink subframe and a downlink subframe for wireless communication in HD-FDD (Half Duplex Frequency Division Duplex);
Notifying the terminal device of the subframe configuration;
As a program to make the processor function as.
(38)
The device according to any one of (29) to (33), wherein the device is the terminal device or a module for the terminal device.
(39)
A subframe configuration for determining an uplink subframe and a downlink subframe for wireless communication in HD-FDD, the base station acquiring information indicating the subframe configuration notified to the terminal device;
Controlling, by the processor, wireless communication in HD-FDD with the base station by the terminal device according to the subframe configuration;
Including methods.
(40)
A subframe configuration for determining an uplink subframe and a downlink subframe for wireless communication in HD-FDD, the base station acquiring information indicating the subframe configuration notified to the terminal device;
Controlling wireless communication in HD-FDD with the base station by the terminal device according to the subframe configuration;
A program that causes a processor to execute.
(41)
A subframe configuration for determining an uplink subframe and a downlink subframe for wireless communication in HD-FDD, the base station acquiring information indicating the subframe configuration notified to the terminal device;
Controlling wireless communication in HD-FDD with the base station by the terminal device according to the subframe configuration;
A readable recording medium on which a program for causing a processor to execute is recorded.

DESCRIPTION OF SYMBOLS 1 Communication system 10 Cell 100 Base station 151 Selection part 153 Information acquisition part 155 Control part 200 Base station 241 Information acquisition part 243 Control part

Claims (28)

An acquisition unit that acquires information indicating a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD (Half Duplex Frequency Division Duplex);
A control unit for notifying the terminal device of the subframe configuration;
A device comprising: The apparatus according to claim 1, wherein the subframe configuration is a subframe configuration individually selected for the terminal device. The apparatus according to claim 1, wherein the control unit notifies the terminal apparatus of the subframe configuration by individual signaling to the terminal apparatus. The control unit transmits ACK (Acknowledgement) / NACK (Negative Acknowledgement) for uplink data transmitted by the terminal device according to the subframe configuration to the terminal device in a downlink subframe having the subframe configuration. The apparatus of claim 1, wherein the apparatus performs a request for retransmission request. The apparatus according to claim 4, wherein the downlink subframe in which the ACK / NACK is transmitted includes a subframe other than a subframe that is four subframes after the uplink subframe in which the uplink data is transmitted. An ACK / NACK transmission subframe suitable for the subframe configuration is determined in advance, or
The control unit notifies the terminal device of a subframe for ACK / NACK transmission suitable for the subframe configuration;
The apparatus of claim 1. The subframe for ACK / NACK transmission suitable for the subframe configuration includes a subframe in which ACK / NACK for downlink data transmitted according to the subframe configuration is transmitted,
The subframe in which ACK / NACK for the downlink data is transmitted is an uplink subframe having the subframe configuration.
The apparatus according to claim 6. The subframe for ACK / NACK transmission suitable for the subframe configuration includes a subframe in which ACK / NACK for uplink data transmitted according to the subframe configuration is transmitted,
The subframe in which ACK / NACK for the uplink data is transmitted is a downlink subframe having the subframe configuration.
The apparatus according to claim 6. The control unit allocates radio resources of uplink subframes with the subframe configuration to the terminal apparatus in a downlink subframe that is not a subframe four subframes before the uplink subframe, and the terminal apparatus The apparatus according to claim 1, wherein: The apparatus according to claim 1, wherein the terminal apparatus is an apparatus having a capability of performing wireless communication according to a subframe configuration for uplink and downlink subframes for wireless communication in HD-FDD. The control unit does not allocate radio resources of a specific subframe between an uplink subframe and a downlink subframe of the subframe configuration to the terminal apparatus, and radios of other subframes different from the specific subframe The apparatus according to claim 1, wherein resources are allocated to the terminal apparatus. The other subframe includes an uplink subframe and a down subframe of the subframe configuration,
The radio resources of the other subframes are the radio resources of the uplink subframe of the subframe configuration and the radio resources of the subband configuration of the subband configuration of the uplink bandwidth radio resources. Including radio resources of downlink subframes,
The apparatus of claim 11. The apparatus according to claim 1, wherein the subframe configuration is a subframe configuration selected from a plurality of subframe configurations. The apparatus according to claim 1, wherein the subframe configuration defines an uplink subframe and a downlink subframe for the radio communication among a predetermined number of subframes included in the radio frame. In the subframe configuration, a first number of subframes for the wireless communication among the predetermined number of subframes is defined as an uplink subframe, and the first number of subframes out of the predetermined number of subframes. 15. The apparatus of claim 14, wherein a second number of subframes different from the number of 1 is defined as a downlink subframe. The terminal device supports carrier aggregation,
The subframe configuration includes at least one of a subframe configuration of a primary cell of the terminal device and a subframe configuration of a secondary cell of the terminal device,
The subframe configuration of the primary cell defines a subframe in which ACK / NACK for downlink data transmitted according to the subframe configuration of the secondary cell is transmitted as an uplink subframe.
The apparatus of claim 1. The apparatus according to claim 16, wherein the subframe configuration of the primary cell defines all subframes defined as uplink subframes by the subframe configuration of the secondary cell as uplink subframes. The apparatus according to claim 16, wherein the subframe configuration of the primary cell is the same as the subframe configuration of the secondary cell. The apparatus according to claim 16, wherein the subframe in which the ACK / NACK is transmitted is predetermined for the subframe configuration of the secondary cell. The subframe configuration is one subframe configuration of the primary cell and the secondary cell,
The other of the primary cell and the secondary cell is a TDD (Time Division Duplex) component carrier,
The other subframe configuration of the primary cell and the secondary cell is a TDD uplink / downlink configuration,
The apparatus of claim 16. The subframe configuration is one subframe configuration of the primary cell and the secondary cell,
The other of the primary cell and the secondary cell is an FDD component carrier,
The other subframe configuration of the primary cell and the secondary cell is a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD.
The apparatus of claim 16. The subframe configuration is one subframe configuration of the primary cell and the secondary cell,
The subframe configuration is a subframe configuration selected according to the other subframe configuration of the primary cell and the secondary cell.
The apparatus of claim 16. The subframe configuration is one subframe configuration of the primary cell and the secondary cell,
The control unit controls selection of the other subframe configuration of the primary cell and the secondary cell according to the subframe configuration,
The apparatus of claim 16. An acquisition unit that acquires information indicating the subframe configuration that the base station notifies the terminal device of a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD;
A control unit for controlling wireless communication in HD-FDD with the base station by the terminal device according to the subframe configuration;
A device comprising: The control unit according to claim 24, wherein switching between downlink reception and uplink transmission by the terminal apparatus is performed in a specific subframe between an uplink subframe and a downlink subframe of the subframe configuration. apparatus. The control unit is configured so that the terminal device is a device having a capability of performing wireless communication according to a subframe configuration that defines an uplink subframe and a downlink subframe for wireless communication in HD-FDD. 25. The device of claim 24, notifying a station. The control unit performs a retransmission request process such that an ACK / NACK for downlink data transmitted by the base station according to the subframe configuration is transmitted to the base station in an uplink subframe having the subframe configuration. Run
The uplink subframe in which the ACK / NACK is transmitted includes a subframe other than a subframe four subframes after the downlink subframe in which the downlink data is transmitted.
25. The device according to claim 24. The control unit allocates radio resources to uplink subframes in the subframe configuration, which are notified by the base station to the terminal apparatus in the downlink subframes in the subframe configuration. 25. The apparatus of claim 24, wherein the apparatus is used as an allocation of radio resources for uplink subframes that are not subframes after a frame.

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