KR20140129911A - Method and apparatus for transmitting/receiving signal - Google Patents

Abstract

The present invention relates to a method for allowing a terminal to transmit/receive a signal to/from a base station and at least one terminal. Provided is a method for transmitting/receiving a signal which includes a step of transmitting a signal to at least one terminal through some among uplink resources determined by the wireless resource setting between the base station and the terminal, and a step of receiving a signal from at least one terminal through some among the uplink resources.

Description

Technical Field [0001] The present invention relates to a method and apparatus for transmitting /

The present invention relates to a method and apparatus for transmitting and receiving signals in D2D (Device to Device) communication.

As the spread of mobile terminals such as smart phones and the demand for various services using such mobile terminals have been developed, inter-terminal communication capable of directly transferring data between terminals without passing through network infrastructures such as base stations and access points is getting more popular.

For example, LTE (Long Term Evolution) or LTE-Advanced network, in order to provide more diversified services to users, to guarantee the reliability of communication between terminals, or to increase communication capacity through more efficient use of bandwidth. There is a demand for a technology for supporting inter-terminal communication (or D2D (Device to Device) communication) using radio resources of various mobile communication networks.

There is a demand for a technique for transmitting and receiving data between terminals without going through a base station as the amount of data used through the wireless communication system increases.

On the other hand, such inter-terminal communication can interfere with communication with existing base stations in terms of sharing limited radio resources.

In view of the foregoing, it is an object of the present invention to provide a method for transmitting and receiving an inter-terminal signal that minimizes interference with communication with a base station.

In order to achieve the above object, in one aspect, the present invention provides a method for transmitting and receiving signals between a base station and at least one other terminal, the method comprising: transmitting uplink resources Transmitting a signal to the at least one other terminal through some of the resources; And receiving a signal from the at least one other terminal through a resource of another one of the uplink resources.

According to another aspect of the present invention, there is provided a method for transmitting / receiving signals to / from a base station and / or at least one other terminal through at least one other terminal through some of the uplink resources determined according to radio resource setting with the base station A transmitter for transmitting a signal; And a receiver for receiving a signal from the at least one other terminal through a resource of another one of the uplink resources.

According to the present invention, a terminal can transmit / receive a signal to / from another terminal while minimizing interference with communication with the base station.

FIG. 1 is a schematic view of a wireless communication system to which embodiments are applied.
2 is a diagram illustrating an example of resource allocation according to an embodiment of the present invention.
3 is a block diagram of an apparatus according to an embodiment of the present invention that follows TDD setting.
4 is a diagram illustrating another example of resource allocation according to an embodiment of the present invention.
5 is a diagram illustrating a configuration of an uplink / downlink according to TDD setting.
6 is a block diagram of an apparatus according to an embodiment of the present invention that follows the FDD setting.
7 is a diagram illustrating another example of resource allocation according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected,""coupled," or "connected."

FIG. 1 is a schematic view of a wireless communication system to which embodiments are applied.

The wireless communication system 100 is widely deployed to provide various communication services such as voice, packet data, and so on.

1, a wireless communication system 100 includes a first user equipment (UE) 120, a second user equipment 122, and a base station 110 (BS).

The term " UE " in this specification is a generic concept of a user terminal in a wireless communication. UE (User Equipment) in Wideband Code Division Multiple Access (WCDMA) and Long Term Evolution (LTE) and High Speed Packet Access (HSPA) Of course, it should be interpreted as a concept including all of MS (Mobile Station), UT (User Terminal), SS (Subscriber Station), and wireless device in Global System for Mobile communications (GSM).

Each of the terminals can perform feedback of channel information described below and provides the device.

A base station 110 or a cell is generally a station that communicates with a terminal and includes a Node-B, an evolved Node-B (eNB), a Base Transceiver System (BTS), an access point Access Point, Relay Node, and the like.

The base station 110 transmits a reference signal to the terminals 120 and 122, receives channel information from the terminals 120 and 122, and transmits data or signals using the channel information.

That is, the base station 110 or the cell in the present specification should be construed as a comprehensive meaning indicating a partial area covered by a BSC (Base Station Controller) in CDMA (Code Division Multiple Access), a Node-B in WCDMA And covers various coverage areas such as megacell, macrocell, microcell, picocell, femtocell, and relay node communication range.

The term " terminal " and " base station 110 " are used herein in the broadest sense as the two transmitting and receiving subjects used to implement the technical or technical idea described in this specification and are not limited by any specific term or word.

There is no limit to the multiple access scheme that is applied to the wireless communication system 100. Various multiple access schemes such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), OFDM-FDMA, OFDM- Can be used.

A TDD (Time Division Duplex) scheme in which uplink and downlink transmissions are transmitted using different time periods, or an FDD (Frequency Division Duplex) scheme in which they are transmitted using different frequencies can be used.

One embodiment is applied to asynchronous wireless communication that evolves into LTE (Long Term Evolution) and LTE-advanced via GSM, WCDMA, and HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB (Ultra Mobile Broadband) . The present invention should not be construed to be limited or limited to a specific wireless communication field and should be construed as including all technical fields to which the idea of the present invention can be applied.

The wireless communication system 100 to which embodiments are applied may support uplink and / or downlink HARQ (Hybrid ARQ) and may use a channel quality indicator (CQI) for link adaptation. For example, the downlink may be OFDMA (Orthogonal Frequency Division Multiple Access), the uplink may be a Single Carrier-Frequency Division Multiple Access (SC-FDMA) ) Can be used.

In a conventional mobile communication system, communication between a terminal and a base station is performed. Recently, a D2D communication technology in which a terminal directly transmits data to an adjacent terminal is considered. In case of D2D communication, the resources used in the existing mobile communication are used. At this time, an interference problem may occur between the existing mobile communication system and the D2D communication.

In the present invention, it is considered that resources used for D2D communication are uplinks in which signals are transmitted from a terminal to a base station in a conventional mobile communication. In general, since the number of base stations is limited and its position is fixed, the uplink is less susceptible to interference than the downlink.

In the present invention, uplink resources considered for D2D communication are applicable to both FDD and TDD communication systems.

In the present invention, a resource allocation will be presented focusing on a method of allocating uplink of a mobile communication system to D2D communication. The uplink is less susceptible to interference and the occurrence of interference can be detected easily since the number of the receiving base station is smaller than the number of the mobile stations and the position or propagation situation can be measured by a signal periodically transmitted by the base station.

The first thing to consider is the D2D communication in TDD mode. D2D communication in the TDD communication mode is advantageous in that D2D communication terminals can simultaneously perform D2D communication while receiving a downlink transmitted from a base station. That is, in the TDD mode, a terminal can selectively communicate with a base station, as well as with a neighboring terminal.

Considering resource allocation in TDD mode In TDD, a part of a link set uplink is allocated for D2D communication. An embodiment of the resource allocation proposed in the present invention is shown in Fig.

2 is a diagram illustrating an example of resource allocation according to an embodiment of the present invention.

Referring to FIG. 2, some of the uplink resources are allocated for D2D communication. The U indicates resources allocated to the conventional uplink. Resources marked U can not be used for D2D communications. However, some of the uplink resources are allocated for D2D communication. The resources labeled U1 and U2 are the resources allocated for D2D communication. The resources indicated by U1 and U2 can transmit data to the adjacent terminals. A resource indicated by U1 is a period in which a terminal set as a host in D2D communication transmits a signal to a terminal set as a remote terminal, and a terminal set as U2 transmits data to a terminal set as a host set as a remote terminal in D2D communication. The resources indicated by U1 or U2 can also transmit data to the base station in the uplink in the terminals of the conventional mobile communication system.

The transmission power of the terminal transmitting in the interval of U1 or U2 may be set low so that existing terminals may receive less interference due to interference even if they transmit data to the base station in the corresponding interval.

3 is a block diagram of an apparatus according to an embodiment of the present invention that follows TDD setting.

Referring to FIG. 3, the apparatus 400 may include a transmitter 410, a receiver 420, and a controller 430.

The transmitter 410 transmits a signal to at least one other terminal through some of the uplink resources determined according to the TDD setting with the base station.

The receiving unit 420 receives a signal from at least one other terminal through a part of the uplink resources determined according to the TDD setting with the base station.

The control unit 430 controls all functions that the device 400 applies to transmit and receive signals according to one embodiment of the present invention.

The apparatus 400 may request downlink data during the D sub-frame for receiving downlink data transmitted from the base station. In addition, the device 400 receives data during the U2 subframe if it is set as a host when receiving data for D2D communication. On the other hand, the device 400 may receive data during the U1 subframe if it is set to remote. The device 400 may transmit data to the base station in the U1 and U2 subframes as well as the U if it wishes to transmit data to the base station. However, when the device 400 transmits data for D2D communication, the host terminal transmits data to the U1 subframe and the remote terminal transmits data to the U2 subframe.

FIG. 4 is a diagram illustrating another example of resource allocation according to an embodiment of the present invention. FIG. 5 is a diagram illustrating a configuration of an uplink / downlink according to a TDD setting.

FIG. 4 shows an embodiment in which the uplink in the FDD mode is set for D2D communication. Referring to FIG. 4, a conventional uplink resource transmits only a signal from a mobile station to a base station. Therefore, in the FDD mode, one frequency resource is used as an uplink.

Some of these resources are used for D2D communication. The resources used for D2D communication are shown as U1 and U2. As shown in FIG. 4, the resource allocated to U2 is set to be larger than the resource allocated to U1. It is assumed that the amount of data transmitted from the remote to the host in the D2D communication is larger than the opposite direction.

Referring to FIG. 4, when D2D is set in the FDD, it is understood that U1 is changed to U and U2 is changed to U to be one of the TDD settings in FIG. When D2D communication is performed in this manner, the operation in various TDD modes such as HARQ (Hybrid Automatic Repeat reQuest) can be applied to D2D as it is.

That is, if a portion used as D in the TDD mode setting of FIG. 5 is set as a U1 subframe to be remotely transmitted from a host of D2D communication and a portion used as U is set to be transmitted from a remote D2D communication to a host, Can be operated in a configuration similar to that used in LTE, so that a D2D implementation can be easily performed.

In addition, as described above, a special subframe may be inserted between U1 and U2 in a scheme of reallocating FDD uplink resources to the TDD scheme. For example, in FIG. 5, a portion used as D for TDD setting 0 is designated as U1, a portion used for U is set as U2, and a S (special sub-frame) can be allocated for changing from U1 to U2. In this special subframe, the remote receives all the signals from the host (U1) (after passing through S), and the remote transmits the signals to the host (U2).

6 is a block diagram of an apparatus according to an embodiment of the present invention that follows the FDD setting.

Referring to FIG. 6, the apparatus 600 may include a transmitter 610, receivers 620 and 622, and a controller 630.

The transmitter 610 transmits a signal to at least one other terminal through some of the uplink resources determined according to the FDD setting with the base station.

The receiving units 620 and 622 receive signals from at least one other terminal through a part of the uplink resources determined according to the FDD setting with the base station.

The receiving unit may be divided into a receiving unit 620 for receiving FDD uplink resources and a receiving unit 622 for receiving FDD downlink resources. Here, the receiver 620 for reception in the FDD uplink resource receives the signal transmitted from the other terminal through the FDD uplink resource. The reception unit 622 for reception in the FDD downlink resource receives the signal transmitted from the base station through the FDD downlink resource.

The control unit 630 controls the overall function of the device 600 for transmitting and receiving signals according to an embodiment of the present invention.

The apparatus 600 of FIG. 6 receives signals of two frequencies. That is, it not only receives the downlink in the FDD mode of the mobile communication system, but also receives the portion set as the uplink air D2D. And performs communication with the base station of the mobile communication system through a frequency set as the uplink of the FDD and a terminal performing D2D communication. The controller sets the terminal timing of the entire terminal and controls the U, U1, and U2 subframes. If the apparatus 600 is set to operate only as the D2D and not to receive the downlink of the mobile communication system, it may not include the receiving unit 622 for reception in the FDD downlink resource.

The method of setting the U1 section and the U2 section of FIG. 2 or FIG. 4 can be implemented in various forms. The first thing you can do is to assign it statically. This defines various types of U1 and U2 subframes in the specification and shares the corresponding setting numbers among the D2D terminals. The setter can inform the terminals participating in the D2D communication when the mobile communication system permits communication of the D2D.

Another possible method of resource allocation is to inform the base station of the mobile communication system of the resources used in the D2D and to leave the internal configuration to the host of the D2D communication. That is, the base station of the mobile communication system informs terminals participating in D2D of information on subframes that can be set as U1 and U2. The host of D2D sets U1 and U2 among the possible settings and informs the remote terminal (s) to perform D2D communication. This is because the amount of data to be transmitted by the host or remote D2D communication may vary depending on the application and application to be used. In other words, when the amount of data to be transmitted by the host is large, resources are allocated in a direction to increase the frequency of the U1 subframe. On the contrary, when the amount of data to be transmitted by the remote is large, . ≪ / RTI > The control message transmitted in the setting of the link can be transmitted through a control channel such as the PDCCH or the E-PDCCH which the host transmits to the remote and can be set through a higher-level message such as another PDSCH.

7 is a diagram illustrating another example of resource allocation according to an embodiment of the present invention.

FIG. 7 illustrates another embodiment of another type of resource allocation described above. The base station sets the resources to be used for D2D communication in three forms. U1, U2, and U3. U1 is a subframe transmitted from the host to the remote in D2D, and U2 is a subframe transmitted from the remote to the host. U3 is a subframe that can be used for two purposes. The base station informs the sub-frames U1, U2, and U3 of the terminals that are performing D2D communication. In this case, the host of D2D is set to be variable so that the subframe of U3 can be transmitted from the host to the remote and from the remote to the host. In the drawing, U3-1 denotes a subframe that can be set to be variable, and U3-1 denotes a subframe that can be set to be variable. And is set for transmission. An embodiment in which the host sets the U3 subframe is shown in the figure below. Referring to the drawings, the first embodiment shows that the number of subframes to be remotely transmitted from the host is set to be larger. In the second embodiment, more subframes are transmitted from the remote to the host.

Hereinafter, a method and apparatus for transmitting / receiving a signal according to an embodiment of the present invention will be described with reference to the drawings. Embodiments that have not been described or may be described in other terms are further described below.

A method for transmitting and receiving signals between a base station and another terminal, the method comprising the steps of: transmitting a signal to another terminal through some of the uplink resources determined according to a radio resource setting between the base station and the terminal; And receiving signals from other terminals via some of the resources.

Here, the radio resource setting may be a TDD scheme or an FDD scheme.

In the case of the TDD scheme, the terminal may transmit a signal to another terminal through a subframe of a part of the uplink subframe in the step of transmitting a signal to another terminal. Also, the terminal may receive a signal from another terminal through a subframe of another part of the uplink subframe in the step of receiving a signal to another terminal.

In case of the FDD scheme, the UE may transmit a signal to another UE through some of the uplink resources of the FDD setup in the step of transmitting a signal to another UE. In addition, the terminal may receive a signal from another terminal through another part of the uplink resources of the FDD setting in the step of receiving a signal to the other terminal.

In the case of the FDD scheme, the UE may further set the uplink resource of the FDD setting to TDD, transmit the signal to the other UE in the downlink subframe of the TDD setup, and receive the signal from the other UE in the uplink subframe .

When the uplink resource of the FDD setting is further set to the TDD, the UE also transmits a signal to the other UE through the downlink subframe of the TDD setup, and transmits HARQ from the other UE in the uplink subframe according to the HARQ setting of the TDD. Message.

In connection with transmitting / receiving information for allocating resources used for communication with other terminals in uplink resources, the terminal transmits resource allocation information for signal transmission / reception with other terminals among the uplink resources to another terminal As shown in FIG.

In this step, the UE can directly generate resource allocation information and transmit the resource allocation information received from the base station to another UE.

The terminal may transmit an indicator for instructing resource allocation with respect to the resource allocation information to another terminal. The other terminal has information on the standard related to the resource allocation such as the resource allocation table, and can search for the corresponding resource allocation information using an indicator transmitted by the terminal.

The indicator for allocating resources may be included in control information of a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (E-PDCCH) and may be transmitted from the terminal to another terminal.

The terminal may further include a step of receiving from the base station an indicator for indicating resource allocation information or resource allocation. Through this step, the base station can control the radio resources used for the D2D communication of the terminal.

A terminal receives resource allocation information from a base station, and the terminal can reallocate resources for transmission to other terminals and resources for reception within the range of resources included in the resource allocation information. In addition, the terminal may further include transmitting the resource reallocation information to another terminal.

The above-described additional explanation will be described from the point of view of the apparatus.

A terminal transmitting and receiving a signal to and from a base station and a different terminal may include a transmitter for transmitting a signal to another terminal through some of uplink resources determined according to a radio resource setting with a base station, And a receiver for receiving a signal from the terminal.

The transmitter may transmit resource allocation information for a part of resources for the signal transmission / reception with other terminals and resources of other resources among the uplink resources to another terminal.

In addition, the transmitter can dynamically transmit the resource allocation information to another terminal through control information of a Physical Downlink Control Channel (PDCCH) or Enhanced-Physical Downlink Control Channel (E-PDCCH).

In addition, the transmitter may transmit an indicator for directing allocation of resources for a part of the uplink resources to another terminal.

Meanwhile, the receiving unit may receive from the base station an indicator for instructing resource allocation for a part of resources and another part of resources for signal transmission / reception with another terminal among uplink resources.

In addition, the receiving unit may receive the resource allocation information for resources allocated for transmitting / receiving signals with other terminals among the uplink resources from the base station. In this case, the transmitting unit may transmit resource allocation information Some of the resources that transmit signals to other terminals and some of other resources that receive signals to other terminals may be reallocated and the resource reallocation information may be transmitted to other terminals.

The radio resource setting may be a TDD scheme or an FDD scheme.

In the TDD scheme, a transmitter can transmit a signal to another terminal through a subframe of a part of uplink subframes. In addition, the receiving unit can receive a signal from another terminal through a subframe of another part of the uplink subframe.

In the case of the FDD scheme, the transmitter can transmit a signal to another terminal through some of the uplink resources of the FDD setting. In addition, the receiving unit may receive a signal from another terminal through another part of the uplink resources of the FDD setting.

In the case of the FDD scheme, the transmitter further sets the uplink resource of the FDD setting to TDD, transmits the signal to the other terminal in the downlink subframe of the TDD setup, and the receiver receives the signal from the other terminal in the uplink subframe .

When the uplink resource of the FDD setting is further set to TDD, the transmitter transmits a signal to the other terminal through the downlink subframe of the TDD setting, and the receiver receives the signal from the other terminal in the uplink subframe according to the HARQ setting of the TDD. And may receive a HARQ message.

In the present invention, a method of allocating a part of resources used in a conventional mobile communication system to D2D communication is proposed. Also, we propose a resource allocation scheme considering duplexing in communication between host and remote in D2D communication. This resource allocation scheme minimizes the factors that can cause performance degradation such as interference in the conventional mobile communication system. In addition, this resource allocation scheme improves the efficiency of the D2D communication link, thereby enabling high-speed communication to be performed efficiently.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (20)

A method in which a terminal transmits and receives signals to and from a base station and at least one other terminal,
Transmitting a signal to the at least one other terminal through some of the uplink resources determined according to a radio resource setting between the base station and the terminal; And
Receiving a signal from the at least one other terminal through another of the uplink resources;
Lt; / RTI >
The method according to claim 1,
And transmitting to the at least one other terminal resource allocation information for the part of resources and the other part of resources for signal transmission / reception with the at least one other terminal among the uplink resources .
3. The method of claim 2,
In the step of transmitting the resource allocation information to the at least one other terminal,
Wherein the resource allocation information is dynamically transmitted to the at least one other terminal through control information of a PDCCH (Physical Downlink Control Channel) or an E-PDCCH (Enhanced-Physical Downlink Control Channel).
The method according to claim 1,
In the step of transmitting the resource allocation information to the at least one other terminal,
And transmitting an indicator to the at least one other terminal indicating an allocation of resources for the part of the resources for transmitting a signal to the at least one other terminal among the uplink resources.
The method according to claim 1,
Further comprising the step of receiving from the base station an indicator indicating a resource allocation for the part of resources and the other part of resources for signal transmission / reception with the at least one other terminal among the uplink resources / RTI >
The method according to claim 1,
Receiving at least one resource allocation information for a resource allocated for signal transmission / reception with the at least one other terminal among the uplink resources from the base station, Allocating resources of the other part that receive a signal to the at least one other terminal and transmitting the resource reallocation information to the at least one other terminal; Further comprising:
The method according to claim 1,
The radio resource setting is a TDD (Time Division Duplex) setting,
In the step of transmitting a signal to the at least one other terminal,
Transmitting a signal to the at least one other terminal through a subframe of a part of uplink subframes of the TDD setting,
In receiving the signal from the at least one other terminal,
And receiving a signal from the at least one other terminal through a subframe of another one of the uplink subframes of the TDD setting.
The method according to claim 1,
The uplink resource setting is a frequency division duplex (FDD) setting,
In the step of transmitting a signal to the at least one other terminal,
Transmitting a signal to the at least one other terminal through the part of the uplink resources of the FDD setting,
In the step of receiving a signal to the at least one other terminal,
And receives a signal from the at least one other terminal through the other of the uplink resources of the FDD setting.
9. The method of claim 8,
In the step of transmitting a signal to the at least one other terminal,
Wherein the uplink resource of the FDD setting is further set to TDD and the signal is transmitted to the at least one other terminal through the downlink or uplink subframe of the TDD setting.
10. The method of claim 9,
In the step of transmitting a signal to the at least one other terminal,
Transmitting a signal to the at least one other terminal through a downlink sub-frame of the TDD setting,
In the step of receiving a signal to the at least one other terminal,
And receiving an HARQ message from the at least one other terminal in an uplink subframe according to a Hybrid Automatic Repeat reQuest (HARQ) setting of the TDD.
A terminal for transmitting and receiving signals to and from a base station and at least one other terminal,
A transmitter for transmitting a signal to at least one other terminal through some of uplink resources determined according to a radio resource setting with the base station; And
And a receiver for receiving a signal from the at least one other terminal through another one of the uplink resources
.
12. The method of claim 11,
The transmitter may further comprise:
And transmits to the at least one other terminal resource allocation information for the part of resources and the other part of resources for signal transmission / reception with the at least one other terminal among the uplink resources.
13. The method of claim 12,
The transmitter may further comprise:
Wherein the resource allocation information is dynamically transmitted to at least one other terminal through control information of a Physical Downlink Control Channel (PDCCH) or Enhanced-Physical Downlink Control Channel (E-PDCCH).
12. The method of claim 11,
The transmitter may further comprise:
To the at least one other terminal among the uplink resources, an indicator for indicating resource allocation for the part of resources for transmitting a signal to the at least one other terminal.
12. The method of claim 11,
The receiver may further comprise:
And receives from the base station an indicator indicating allocation of the resources for the signal transmission / reception with the at least one other terminal among the uplink resources and resource allocation for the other part of the resources.
12. The method of claim 11,
The receiver may further comprise:
Receiving resource allocation information on a resource allocated for signal transmission / reception with the at least one other terminal among the uplink resources from the base station,
The transmitter may further comprise:
A part of the resources transmitting signals to the at least one other terminal among the resources allocated for signal transmission / reception with the at least one other terminal, and the other part of the resources receiving signals to the at least one other terminal, And transmits the resource reallocation information to the at least one other terminal.
12. The method of claim 11,
The radio resource setting is a TDD (Time Division Duplex) setting,
The transmitter may further comprise:
Transmitting a signal to the at least one other terminal through a subframe of a part of uplink subframes of the TDD setting,
The receiver may further comprise:
And receives a signal from the at least one other terminal through a subframe of another one of uplink subframes of the TDD setting.
12. The method of claim 11,
The uplink resource setting is a frequency division duplex (FDD) setting,
The transmitter may further comprise:
Transmitting a signal to the at least one other terminal through the part of the uplink resources of the FDD setting,
The receiver may further comprise:
And receives a signal from the at least one other terminal through the other of the uplink resources of the FDD setting.
19. The method of claim 18,
The transmitter may further comprise:
Further sets an uplink resource of the FDD setting to TDD and transmits a signal to the at least one other terminal through a downlink or uplink subframe of the TDD setting.
20. The method of claim 19,
The transmitter may further comprise:
Transmitting a signal to the at least one other terminal through a downlink sub-frame of the TDD setting,
The receiver may further comprise:
And receives an HARQ message from the at least one other terminal in an uplink subframe according to a Hybrid Automatic Repeat reQuest (HARQ) setting of the TDD.

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