KR20140042097A - Method and apparatus for transmitting response information of downlink data - Google Patents

Abstract

The present invention relates to a method and an apparatus for transmitting the response information of downlink data and, more particularly, to a method and an apparatus for transmitting the response information of downlink data related to a serving cell having a time division duplex (TDD) setting. According to an embodiment of the present invention, the method for transmitting the response information of downlink data includes a step of receiving downlink data from a base station; and a step of transmitting the response information with respect to the downlink data to an uplink sub frame. [Reference numerals] (AA) Base station; (BB) Terminal; (S1110) Transmit the capability of the terminal; (S1120) RRC signaling; (S1130) Transmit downlink data; (S1140) Procedure for transmitting HARQ-ACK; (S1150) Transmit PUCCH; (S1160) HARQ-ACK decoding

Description

[0001] The present invention relates to a method and apparatus for transmitting response information of downlink data,

The present invention relates to a method and apparatus for transmitting response information of downlink data, and more particularly, to a method and apparatus for transmitting response information in a plurality of serving cells having different time division duplex (TDD) settings.

As communications systems evolved, consumers, such as businesses and individuals, used a wide variety of wireless terminals. In a mobile communication system such as the current 3GPP family Long Term Evolution (LTE) and LTE-A (LTE Advanced), a high-speed and large-capacity communication system capable of transmitting and receiving various data such as video and wireless data, , It is required to develop a technology capable of transmitting large-capacity data based on a wired communication network. As a method for transmitting a large amount of data, data may be efficiently transmitted through a plurality of component carriers (CCs). Meanwhile, in a time division duplex (TDD) system, transmission (Tx) and reception (Reception (Rx)) may be divided into time slots using a specific frequency band and may transmit and receive data.

In the conventional CA TDD, it is assumed that the A / N transmission method through the physical uplink control channel (PUCCH) has the same number of DL subframes associated with one PCell UL subframe. This is because in the conventional CA TDD, all serving cells are defined to have the same TDD UL-DL configuration. However, in a system in which different TDD settings are configured on different carriers, additional handling is required to accurately support the A / N transmission method through the PUCCH. Therefore, the present specification proposes an additional handling method for solving the throughput reduction of resources in the A / N transmission method through the PUCCH that can occur in such an environment.

It is an object of the present invention to provide a method and apparatus for improving performance when transmitting response information in a plurality of serving cells having different time division duplex (TDD) settings.

According to an embodiment of the present invention, a method in which a terminal communicating with a base station through a first serving cell and a second serving cell having different time division duplex (TDD) settings transmits response information about downlink data. Receiving downlink data in a downlink subframe of the first serving cell and the second serving cell from a base station; And transmitting response information for the downlink data received in the downlink subframe of the first serving cell and the second serving cell to an uplink subframe, wherein the response information for the downlink data is one. Generated by performing time domain bundling on the response data in the downlink subframe, and a size of a bundling window of a serving cell having a smaller bundling window among the first serving cell and the second serving cell is the first serving cell and Among the second serving cells, the size of the bundling window is increased to the size of the bundling window of the larger serving cell, and the increased data is set to DTX, and at least some of the states mapped through the time domain bundling are overlapped and at least some of the other If not used, at least part of the mapping relationship in case of overlapping is changed. A method of transmitting response information of downlink data is provided.

Another embodiment of the present invention is a terminal for communicating with a base station through a first serving cell and a second serving cell having a different time division duplex (TDD) configuration, and the first serving cell and the second serving cell from the base station. Receiving unit for receiving downlink data in the downlink subframe of the; A transmitter for transmitting response information on the downlink data received in the downlink subframe of the first serving cell and the second serving cell to an uplink subframe; And a controller configured to generate response information on the downlink data by performing time domain bundling on response data in one or more downlink subframes, wherein the size of a bundling window of the first and second serving cells is increased. The size of the bundling window of the small serving cell is increased to the size of the bundling window of the serving cell having the larger bundling window among the first serving cell and the second serving cell, and the increased data is set to DTX and the time domain bundling is performed. When at least some of the states mapped through are used in duplicate, and at least some of them are not used, the mapping relationship of at least some of the overlapped cases is changed.

According to the present invention described above, performance can be improved when transmitting response information in a plurality of serving cells having different time division duplex (TDD) settings.

1 illustrates a wireless communication system to which embodiments of the present disclosure are applied.
FIG. 2 is a diagram illustrating an operation method for each subframe in a half-duplex mode on a collision subframe that may occur due to different TDD settings for each CC in a CA environment.
3 is a diagram illustrating an operation method for each subframe when the terminal is in full-duplex mode in a CA environment.
4 illustrates a case where the TDD UL-DL configuration of the PCell is 1 and the TDD UL-DL configuration of the SCell is 2.
FIG. 5 illustrates a case of a PCell in uplink subframe 2 in the example of FIG. 4.
6 shows an example in which the size M _primary of the time domain bundling window of the PCell is 1 and the size M _secondary of the time domain bundling window of the SCell is 1.
7 illustrates an example in which the size M _primary of the time domain bundling window of the PCell is 3 and the size M _secondary of the time domain bundling window of the SCell is 1.
FIG. 8 shows an example in which the size M _primary of the time domain bundling window of the PCell is 4 and the size M _secondary of the time domain bundling window of the SCell is 2.
9 illustrates an example in which the size M _primary of the time domain bundling window of the PCell is 4 and the size M _secondary of the time domain bundling window of the SCell is 3.
10 illustrates an example in which the size M _primary of the time domain bundling window of the PCell is 2 and the size M _secondary of the time domain bundling window of the SCell is 2.
11 illustrates a HARQ-ACK transmission method according to an embodiment.
12 illustrates in more detail the step S1140 of FIG. 11.
13 is a block diagram illustrating a configuration of a terminal according to an embodiment.
14 is a block diagram illustrating a configuration of a base station according to an embodiment.

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 symbols as 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.

1 illustrates a wireless communication system to which embodiments of the present disclosure are applied.

1, a wireless communication system includes a user equipment (UE) 10 and a base station (BS) 20 that performs uplink and downlink communications with a terminal 10. [

In this specification, the terminal 10 is a comprehensive concept of a terminal in a wireless communication. The terminal 10 may be a mobile station (MS), a user terminal (UT) in GSM as well as a UE (User Equipment) in WCDMA, LTE, HSPA, , A subscriber station (SS), a wireless device, and the like.

The base station 20 is generally a station for communicating with the terminal 10, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS. The term "transceiver system", "access point" or "relay node" may be referred to as other terms.

In addition, the base station 20 is meant to cover various coverage areas such as megacell, macrocell, microcell, picocell, femtocell, radio resource head (RRH) and relay node communication range.

The base station 20 may be referred to as a Transmission Point (TP) in terms of transmitting downlink communication to the terminal 10 and may be referred to as a Reception Point , RP), or may be referred to as a Point or a Transmission and Reception Point.

Time Division Duplex (TDD) scheme in which uplink and downlink communications are performed using different times in a wireless communication system, or frequency division duplex (FDD) in which uplink and downlink communications are performed using different frequencies ) Method may be used.

In the case of TDD, a TDD configuration (TDD UL-DL configuration) indicating a subframe in which uplink communication is performed and a subframe in which downlink communication is performed may be configured in one radio frame.

Table 1 below shows the TDD configuration. It can be seen that each TDD configuration has a different UL-DL subframe transmission timing. This TDD setting is set cell-specific.

Uplink-downlink
configuration Downlink-to-uplink
Switch-point periodicity Subframe number 0 One 2 3 4 5 6 7 8 9 0 5 ms D S U U U D S U U U One 5 ms D S U U D D S U U D 2 5 ms D S U D D D S U D D 3 10 ms D S U U U D D D D D 4 10 ms D S U U D D D D D D 5 10 ms D S U D D D D D D D 6 5 ms D S U U U D S U U D

In the radio frame corresponding to the 10 subframes in Table 1, the region denoted by D is downlink and the region denoted by U is uplink. S denotes a special subframe, and includes a downlink partial transmit subframe (DWPTS), an uplink partial transmit subframe (UWPTS), and a guard time. For example, when the TDD configuration is "1", when the subframe number is 0, 4, 5, 9, the downlink subframe is used. When the subframe number is 2, 3, 7, 8, the uplink is Subframe, and when the subframe number is 1 or 6, the subframe is switched from downlink to uplink.

On the other hand, when using one of the TDD configuration, the UE may know in advance at which time is downlink and at what time. This information allows the terminal to predict and operate in advance.

Ack / Nack (A / N) for the Physical Downlink Shared CHannel (PDSCH) is transmitted from the UE 10 to the BS 20 through an uplink subframe. The base station 20 receives the A / N transmitted from the terminal 10 and confirms whether or not the terminal 10 has received the transmitted data and retransmits the data (in the case of NACK) can do.

In a TDD system, A / N information on a PDSCH transmitted in several downlink subframes may be transmitted in one uplink subframe. In this case, the number of downlink subframes associated with each uplink subframe is defined as M. In each uplink subframe, a downlink related set (K: {k ₀ , k ₁ ,… k _{M -1} }) indicating which downlink subframe is transmitted through which downlink subframe is transmitted is as follows. It may be as shown in Table 2.

UL - DL
Configuration Subframe n 0 One 2 3 4 5 6 7 8 9 0 - - 6 - 4 - - 6 - 4 One - - 7, 6 4 - - - 7, 6 4 - 2 - - 8, 7, 4, 6 - - - - 8, 7, 4, 6 - - 3 - - 7, 6, 11 6, 5 5, 4 - - - - - 4 - - 12, 8, 7, 11 6, 5, 4, 7 - - - - - - 5 - - 13, 12, 9, 8, 7, 5, 4, 11, 6 - - - - - - - 6 - - 7 7 5 - - 7 7 -

Table 2 shows how many PDSCH HARQ (A / N) of downlink subframes are transmitted in each uplink subframe (Subframe n) of each TDD UL-DL configuration. That is, A / N of PDSCH transmitted in downlink subframe nk _i (k _i ∈K) is transmitted in uplink subframe n. For example, assume that the TDD UL-DL configuration is "1". When the subframe number n is 2, K = {7,6}, and the A / N of the PDSCH transmitted in the downlink subframe having the subframe numbers 5 and 6 is transmitted through this subframe. When the subframe number n is 3, K = {4}, and A / N of the PDSCH transmitted in the downlink subframe having the subframe number 9 is transmitted through this subframe. When the subframe number n is 7, K = {7,6}, and the A / N of the PDSCH transmitted in the downlink subframe having the subframe numbers 0 and 1 is transmitted through this subframe. When the subframe number n is 8, K = {4}, and the A / N of the PDSCH transmitted in the downlink subframe having the subframe number 4 is transmitted through the subframe.

Physical Uplink Control CHannel (PUCCH) format 1a / 1b may be used for A / N transmission of the PDSCH. HARQ A / N for one codeword may be transmitted through PUCCH format 1a, and HARQ A / N for two codewords may be transmitted through PUCCH format 1b.

On the other hand, when the number of downlink subframes related to a specific uplink subframe or the number M of elements of a downlink related set (K) is greater than 2, two HARQ- are performed through time domain bundling. The ACK bit may be generated and transmitted through the PUCCH format 1b through a channel selection transmission method. Tables 3 and 4 below are tables for HARQ-ACK state mapping when M = 3 and M = 4, respectively.

For example, referring to Table 2, when TDD configuration 3, the number M of downlink subframes related to uplink subframe 2 is three. When HARQ-ACK (0), HAfRQ-ACK (1), and HARQ-ACK (2) are ACK, ACK, and ACK in the associated downlink subframe, referring to Table 3, it is mapped to ACK and ACK. The HARQ-ACK bit may be transmitted through PUCCH format 1b through the channel selection mapping table.

For another example, referring to Table 2, when TDD is set to 2, the number M of downlink subframes related to uplink subframe 2 is four. When HARQ-ACK (0), HARQ-ACK (1), HARQ-ACK (2), and HARQ-ACK (3) are ACK, ACK, ACK, and ACK in the associated downlink subframe, Two HARQ-ACK bits, which are mapped to ACK and NACK, may be transmitted through PUCCH format 1b through a channel selection mapping table.

Meanwhile, a carrier aggregation (CA) technology that integrates and uses a plurality of component carriers (CCs) may be used as a method for transmitting a large amount of data. When using CA technology in a TDD environment, the TDD configuration may be different for each CC.

For example, different TDD settings may be used in a plurality of CCs for traffic adaptation purposes.

In another example, when a plurality of CCs are located in different bands, a TDD system (e.g., TDS-CDMA, WiMax, etc.) coexists in the same band to avoid interference. , TDD uplink-downlink of LTE-A is configured, and thus, TDD systems may require different TDD settings in inter-bands.

For another example, an uplink subframe may follow many TDD settings in a CC located in a low frequency band, and a downlink subframe may follow many TDD settings in a CC located in a high frequency band. This can help increase coverage.

These examples can affect peak throughput.

In this case, the transmission mode that the UE can support on a conflicting subframe that may be caused by different TDD settings between interbands is half-duplex or full-duplex. Depending on whether the mode, the operation method may be different for each subframe.

FIG. 2 is a diagram illustrating an operation method for each subframe in a half-duplex mode on a collision subframe that may occur due to different TDD settings for each CC in a CA environment. In the example of FIG. 2, a primary cell (PCell) follows the TDD UL-DL configuration “1” and a SCell (Secondary Cell) follows the TDD UL-DL configuration “2”. In FIG. 2, U is a subframe reserved for uplink transmission, D is a subframe reserved for downlink transmission, and S is a special subframe switched from downlink transmission to uplink transmission.

Referring to FIG. 2, when subframe numbers 3 and 8, the PCell is set to uplink and the SCell is set to downlink. Hereinafter, subframes different in uplink / downlink according to CC will be referred to as conflicting subframes. Since the terminal is in the half-duplex mode, at least one of an uplink subframe of the PCell or a downlink subframe of the SCell is operated as a muted subframe. In the example of FIG. 2, when the subframe numbers are 3 and 8, the uplink subframe of the PCell is a subframe muted.

An uplink control channel (PUCCH) including A / N for PDSCH (PDSCH A / N) may be transmitted through a PCell. Hereinafter, 'PDSCH A / N' is used as the same meaning as 'A / N for PDSCH'. However, when the uplink subframe that transmits PDSCH A / N in the PCell is a muted subframe, it may occur that PDSCH A / N cannot be transmitted through this.

In the example of FIG. 2, since the TDD UL-DL configuration of the PCell is “1”, referring to Table 2, PDSCH A / N may be transmitted when subframe numbers 2, 3, 7, and 8 are used. However, when the uplink subframe of the PCell is a muted subframe when the subframe numbers are 3 and 8, the PDSCH A / which is transmitted to the downlink subframe having the subframe number 9 through the subframe having the subframe number 3 / N cannot be transmitted and a PDSCH A / N transmitted in a downlink subframe having a subframe number of 4 cannot be transmitted through a subframe having a subframe number of 8.

3 is a diagram illustrating an operation method for each subframe when the terminal is in full-duplex mode in a CA environment. In FIG. 3, the PCell follows the TDD UL-DL configuration “1” and the SCell follows the TDD UL-DL configuration “2”. In FIG. 3, U is a subframe reserved for uplink transmission, D is a subframe reserved for downlink transmission, and S is a special subframe that is switched from downlink transmission to uplink transmission.

Referring to FIG. 3, when subframe numbers 3 and 8, the PCell is set to uplink and the SCell is set to downlink. Since the UE is in full-duplex mode on a collision subframe that may occur due to different TDD settings set between interbands, the UE may simultaneously transmit an uplink signal through the PCell and a downlink signal through the SCell even on the collision subframe. Can be received.

PUCCH transmitting PDSCH A / N may be transmitted only through the PCell. However, a case may occur in which PDSCH A / N transmitted on a specific downlink subframe cannot be transmitted.

In the example of FIG. 3, since the TDD UL-DL configuration of the PCell is “1”, referring to Table 2, PDSCH A / N may be transmitted when subframe numbers 2, 3, 7, and 8 are used. More specifically, in Table 2, when the uplink subframe number is 2, since K = {7,6}, the PDSCH A / N transmitted through the downlink subframe having the subframe numbers 5 and 6 is transmitted and is uplinked. When K = {4} when the link subframe number is 3, PDSCH A / N transmitted through a downlink subframe having a subframe number of 9 is transmitted. When an uplink subframe number is 7, K = {7, 6}, the PDSCH A / N transmitted through the downlink subframe having the subframe numbers 0 and 1 is transmitted, and when the subframe number is 8, the downlink subframe having the subframe number 4 is K = {4}. PDSCH A / N transmitted through may be transmitted. In summary, when the subframe number is 2, 3, 7, 8, the PDSCH A / N transmitted through the downlink subframe having the subframe number 0, 1, 4, 5, 6, or 9 is transmitted.

Meanwhile, since the TDD UL-DL configuration of the SCell is “2”, referring to Table 2, when the subframe number is 0, 1, 3, 4, 5, 6, 8, 9, the PDSCH may be transmitted in downlink. Can be. When the A / N of the PDSCH transmitted through the SCell is transmitted through the PCell, when the subframe number is 0, 1, 4, 5, 6, or 9, the timing of transmitting the PDSCH A / N is determined by the PCell. Although determined by the UL-DL configuration, the timing of transmitting PDSCH A / N is not set for the case where the subframe numbers are 3 and 8.

As described above, for the TDD when the terminal is configured with one or more serving cells and when at least two serving cells have different UL-DL configurations, there is a problem that PDSCH A / N transmission timing according to Table 2 cannot be used. May occur.

As one method for overcoming this problem, a reference UL-DL configuration for transmitting PDSCH A / N may be as follows: (1) For PCell, UL-DL configuration of PCell This reference UL-DL configuration, and (2) in the case of the SCell reference UL-DL configuration of the SCell may be defined as shown in Table 5 below.

Set # (Primary cell UL / DL configuration, Secondary cell UL / DL configuration) Reference UL / DL configuration Set 1 (0,0) 0 (1,0), (1,1), (1, 6) One (2,0), (2,2), (2,1), (2,6) 2 (3,0), (3,3), (3,6) 3 (4,0), (4,1), (4,3), (4,4), (4,6) 4 (5,0), (5,1), (5,2), (5,3), (5,4), (5,5), (5,6) 5 (6,0), (6,6) 6 Set 2 (0,1), (6,1) One (0,2), (1,2), (6,2) 2 (0,3), (6,3) 3 (0,4), (1,4), (3,4), (6,4) 4 (0,5), (1,5), (2,5), (3,5), (4,5), (6,5) 5 (0,6) 6 Set 3 (3,1), (1,3) 4 (3,2), (4,2), (2,3), (2,4) 5

In Table 5, in the case of Set 1, the reference UL-DL setting of the SCell is the same as the UL-DL setting of the PCell, in case of Set 2, the reference UL-DL setting of the SCell is the same as the UL-DL setting of the SCell, In the case of SCell, the reference UL-DL configuration of the PCell and the SCell other than the UL-DL configuration is set by referring to Table 5. Table 5 also applies to self-scheduling in a CA environment and other reference UL-DL configuration in case of non-carrier scheduling.

For example, FIG. 4 illustrates a case where the TDD UL-DL configuration of the PCell is 1 and the TDD UL-DL configuration of the SCell is 2. The reference UL-DL setting of the PCell is 1, which is the TDD UL-DL setting of the PCell, and the reference UL-DL setting of the SCell is 2 from Table 5. Referring to FIG. 4, A / N for downlink subframes 5 and 6 of the PCell and PDSCHs of downlink subframes 4, 5, 6 and 8 of the PCell are transmitted through the uplink subframe 2 of the PCell. A / N for PDSCH of downlink subframe 9 of PCell is transmitted through uplink subframe 3 of PCell, and downlink subframes 0, 1 of SCell and uplink of SCell through uplink subframe 7 of PCell. A / N for PDSCH of downlink subframes 9, 0, 1, and 3 is transmitted, and A / N for PDSCH of downlink subframe 4 of PCell is transmitted through uplink subframe 8 of PCell.

When different reference UL-DL configurations are applied to two serving cells (PCell and SCell), M (M _primary ) for the PCell and M (M _secondary ) for the SCell may be different in a specific subframe. In the example of FIG. 4, in uplink subframes 2 and 7, the value of M _primary is 2 and the value of M _secondary is 4, which may be different from each other.

That is, one of M _primary and M _secondary is 4 and the other is 1, 2, or 3, or one of M _primary and M _secondary is 3 and the other is 1, 2 In either case, the values of M _primary and M _secondary may be different.

In this case, the value of M may be determined as M = max (M _primary , M _secondary ), and two HARQ-ACK bits may be generated using Table 3 or 4 according to the determined M value.

If M _secondary <M (where M _primary = M), the UE may set HARQ-ACK (j) to DTX when j = M _secondary to M-1 for the SCell. That is, when j = 0 to M _secondary- 1, HARQ-ACK (j) may use the measured value, and when j = M _secondary to M-1, HARQ-ACK (j) may be set to DTX.

On the contrary, when M _primary <M (where M _secondary = M), the UE may set HARQ-ACK (j) to DTX when j = M _primary to M-1 for the PCell. That is, when j = 0 to M _secondary- 1, HARQ-ACK (j) may use the measured value, and when j = M _secondary to M-1, HARQ-ACK (j) may be set to DTX.

As an example, FIG. 5 illustrates a case of a PCell in uplink subframe 2 in the example of FIG. 4. In uplink subframe 2, M _primary value is 2 and M _secondary value is 4, so M (= max (M _primary , M _secondary )) is determined as 4. HARQ-ACK (0) and HARQ-ACK (1) are assigned measured values (e.g., ACK, ACK), and HARQ-ACK (2) and HARQ-ACK (3) are assigned to DTX. Referring to Table 4 used when M = 4, 'ACK, ACK, DTX, and DTX' are mapped to 'NACK, ACK'. Thus, the terminal transmits information of 'NACK, ACK' to the base station.

In certain cases, this approach can result in poor throughput performance due to inefficient use of resources. For example, in Table 4, 'ACK, ACK, ACK, NACK / DTX' is mapped to 'ACK, ACK', HARQ-ACK (2) when the value of M is 4 and the value of M _primary or M _secondary is 2 ) And HARQ-ACK (3) are both set to DTX, so a case in which HARQ-ACK (j) is 'ACK, ACK, ACK, NACK / DTX' cannot occur, and thus 'ACK, ACK' is not used. . This wastes resources that can be used for HARQ-ACK transmission.

Hereinafter, a method of reducing performance attenuation that may occur when having different time domain bundling window sizes in channel selection PUCCH format 1b used as a HARQ-ACK transmission method in a CA environment will be described in detail. . In PUCCH format 1b, if the time domain bundling window size is different, one of M _primary and M _secondary is 4 and the other is 1, 2, or 3, or M _primary and M _secondary There may be a case where one value is 3 and the other value is either 1 or 2.

1.2 Serving cell Bundling window  For sizes 4 and 1, or 3 and 1

6 shows an example in which the size M _primary of the time domain bundling window of the PCell is 1 and the size M _secondary of the time domain bundling window of the SCell is 1. In this case, two HARQ-ACK states are selected for each serving cell using the time domain bundling table of Table 4 where M = 4, and based on this, the associated PUCCH resource (

), B (0) and b (1) can be used to perform PUCCH transmission.

Meanwhile, an example in which the size of the time domain bundling window of the PCell (M _primary ) is 4 and the size of the time domain bundling window of the SCell (M _secondary ) is 1 is described, but the size of the time domain bundling window of the PCell (M _primary ) is 1. In this case, the size of the time domain bundling window (M _secondary ) of the SCell may be applied.

In case of SCell, HARQ-ACK (0) may be one of ACK, NACK, and DTX according to the measurement at the UE, and HARQ-ACK (1), HARQ-ACK (2), and HARQ-ACK (3) are set to DTX. Is set. Referring to Table 4, in this case, the mapped state may be as shown in Table 6 below.

HARQ-ACK (0) HARQ-ACK (1), HARQ-ACK (2), HARQ-ACK (3) Mapped state ACK DTX, DTX, DTX ACK, NACK NACK DTX, DTX, DTX NACK, NACK DTX DTX, DTX, DTX DTX, DTX

Referring to Table 6, since the mapped states are different according to the HARQ-ACK measured by the SCell, throughput performance is not degraded.

7 illustrates an example in which the size M _primary of the time domain bundling window of the PCell is 3 and the size M _secondary of the time domain bundling window of the SCell is 1. In this case, two HARQ-ACK states are selected for each serving cell using the time domain bundling table of Table 3 where M = 3, and based on this, the associated PUCCH resource (

), B (0) and b (1) can be used to perform PUCCH transmission.

Meanwhile, an example in which the size of the time domain bundling window of the PCell (M _primary ) is 3 and the size of the time domain bundling window of the SCell (M _secondary ) is 1 is described, but the size of the time domain bundling window of the PCell (M _primary ) is 1. And it will be understood that the case where the size of SCell's time domain bundling window (M _secondary ) is 3 can also be applied.

In the case of SCell, HARQ-ACK (0) may be one of ACK, NACK, and DTX according to the measurement at the terminal, and HARQ-ACK (1) and HARQ-ACK (2) are set to DTX. Referring to Table 3, in this case, the mapped state may be as shown in Table 7 below.

HARQ-ACK (0) HARQ-ACK (1), HARQ-ACK (2) Mapped state ACK DTX, DTX ACK, DTX NACK / DTX DTX, DTX NACK / DTX, NACK / DTX

Referring to Table 7, since the mapped state is different according to the HARQ-ACK measured in the SCell, throughput performance is not degraded.

Meanwhile, an example in which the size of the time domain bundling window of the PCell (M _primary ) is 3 and the size of the time domain bundling window of the SCell (M _secondary ) is 1 has been described, but the size of the time domain bundling window of the PCell (M _primary ) is 1. It will be appreciated that throughput performance does not degrade even when the size of SCell's time domain bundling window (M _secondary ) is 3.

As described above, when the bundling window sizes of the two serving cells are 4 and 1, 3 and 1, throughput performance is not degraded.

2. 2 Serving cell Bundling window  For sizes 4 and 2

FIG. 8 shows an example in which the size M _primary of the time domain bundling window of the PCell is 4 and the size M _secondary of the time domain bundling window of the SCell is 2. In this case, two HARQ-ACK states are selected for each serving cell using the time domain bundling table of Table 4 where M = 4, and based on this, the associated PUCCH resource (

), B (0) and b (1) can be used to perform PUCCH transmission.

Meanwhile, an example is described in which the size of the time domain bundling window of the PCell (M _primary ) is 4 and the size of the time domain bundling window of the SCell (M _secondary ) is 2, but the size of the time domain bundling window of the PCell (M _primary ) is 2. In this case, the size of the time domain bundling window (M _secondary ) of the SCell may be applied.

In the case of SCell, HARQ-ACK (0) and HARQ-ACK (1) may have a value according to measurement at the terminal, and HARQ-ACK (2) and HARQ-ACK (3) are set to DTX. Referring to Table 4, in this case, the mapped state may be as shown in Table 8 below.

HARQ-ACK (0), HARQ-ACK (1) HARQ-ACK (2), HARQ-ACK (3) Mapped state ACK, ACK DTX, DTX NACK, ACK ACK, NACK DTX, DTX NACK, NACK NACK, ACK DTX, DTX NACK, NACK NACK, NACK DTX, DTX NACK, NACK

Referring to Table 8, when HARQ-ACK (0) and HARQ-ACK (1) measured by the UE are 'ACK, NACK', 'NACK, ACK', 'NACK, NACK', all are mapped to 'NACK, NACK'. You can see the overlap. In this case, the base station that receives the signal of 'NACK, NACK' through the PUCCH format 1b cannot determine whether the UE receives the correct data, and data transmitted through one downlink subframe out of two downlink subframes Even if received, the data transmitted through all downlink subframes is retransmitted.

In addition, in Table 8, it can be seen that 'ACK, ACK' and 'ACK, NACK' are not used among the mapped states.

In order to overcome this problem, in one example, HARQ-ACK may be changed to 'ACK, NACK, DTX, DTX' is applied to 'ACK, DTX, DTX, DTX', referring to Table 4 'ACK, NACK Can be mapped to '. Alternatively, Table 4 may be changed as shown in Table 9 below.

In this case, the states mapped according to the values of HARQ-ACK (0) and HARQ-ACK (1) may be as shown in Table 10 below.

HARQ-ACK (0), HARQ-ACK (1) Mapped state ACK, ACK NACK, ACK ACK, NACK / DTX ACK, NACK NACK, any NACK, NACK

When mapped as shown in Table 10, when the base station receiving the HARQ-ACK information does not retransmit data, retransmits only data transmitted through the second subframe, and transmitted through the first and second subframes. It is possible to distinguish the case of retransmitting all data.

In another example, HARQ-ACK is changed to 'ACK, NACK, DTX, DTX' is changed to 'ACK, DTX, DTX, DTX' and mapped to 'ACK, NACK', 'NACK, ACK, DTX, DTX'is' ACK, ACK, ACK, DTX 'may be changed to' ACK, ACK '. Alternatively, Table 4 may be changed as shown in Table 11 below.

In this case, the states mapped according to the values of HARQ-ACK (0) and HARQ-ACK (1) may be as shown in Table 12 below.

HARQ-ACK (0), HARQ-ACK (1) Mapped state ACK, ACK NACK, ACK ACK, NACK / DTX ACK, NACK NACK, ACK ACK, ACK NACK, NACK / DTX NACK, NACK

When mapped as shown in Table 12, when the base station receiving HARQ-ACK information does not retransmit data, when retransmitting only data transmitted through the second subframe, only the data transmitted through the first subframe is retransmitted. In this case, and retransmission of all data transmitted through the first and second subframes can be distinguished.

3. 2 Serving cell Bundling window  For sizes 4 and 3

9 illustrates an example in which the size M _primary of the time domain bundling window of the PCell is 4 and the size M _secondary of the time domain bundling window of the SCell is 3. In this case, two HARQ-ACK states are selected for each serving cell using the time domain bundling table of Table 4 where M = 4, and based on this, the associated PUCCH resource (

), B (0) and b (1) can be used to perform PUCCH transmission.

Meanwhile, an example is described in which the size of the time domain bundling window of the PCell (M _primary ) is 4 and the size of the time domain bundling window of the SCell (M _secondary ) is 3, but the size of the time domain bundling window of the PCell (M _primary ) is 3. In this case, the size of the time domain bundling window (M _secondary ) of the SCell may be applied.

In the case of SCell, HARQ-ACK (0), HARQ-ACK (1), and HARQ-ACK (2) may have values according to the measurement in the terminal, and HARQ-ACK (3) is set to DTX. Referring to Table 4, in this case, the mapped state may be as shown in Table 13 below.

HARQ-ACK (0), HARQ-ACK (1), HARQ-ACK (2) HARQ-ACK (3) Mapped state ACK, ACK, ACK DTX ACK, ACK ACK, ACK, NACK DTX NACK, ACK ACK, NACK, ACK DTX NACK, NACK ACK, NACK, NACK DTX NACK, NACK NACK, ACK, ACK DTX NACK, NACK NACK, ACK, NACK DTX NACK, NACK NACK, NACK, ACK DTX NACK, NACK NACK, NACK, NACK DTX NACK, NACK

Referring to Table 13, HARQ-ACK (0), HARQ-ACK (1), HARQ-ACK (2) measured by the terminal is' ACK, NACK, ACK ',' ACK, NACK, NACK ',' NACK, ACK , ACK ',' NACK, ACK, NACK ',' NACK, NACK, ACK ',' NACK, NACK, NACK 'can all be mapped to' NACK, NACK 'overlapping. In this case, the base station that receives the signal of 'NACK, NACK' through the PUCCH format 1b cannot determine whether the correct terminal data is received, and is transmitted through one or two downlink subframes among three downlink subframes. Even when data is received, a case of retransmitting data transmitted through all downlink subframes may occur.

In addition, in Table 13, it can be seen that 'ACK, NACK' of the mapped state is not used.

In order to overcome this problem, in one example, HARQ-ACK is changed to 'ACK, NACK, ACK, DTX' and 'ACK, NACK, NACK, DTX' to 'ACK, DTX, DTX, DTX' to 'ACK, NACK 'may be mapped. Alternatively, Table 4 may be changed as shown in Table 14 below.

In this case, the states mapped according to the values of HARQ-ACK (0), HARQ-ACK (1), and HARQ-ACK (2) may be as shown in Table 15 below.

HARQ-ACK (0), HARQ-ACK (1), HARQ-ACK (2) Mapped state ACK, ACK, ACK ACK, ACK ACK, ACK, NACK / DTX NACK, ACK ACK, NACK, any or ACK, DTX, DTX ACK, NACK NACK, any, any NACK, NACK

When mapped as shown in Table 15, when the base station receiving HARQ-ACK information does not retransmit data, when retransmitting data transmitted through the third subframe, data transmitted through the second and third subframes In case of retransmitting, and retransmitting all data transmitted through the first to third subframes can be distinguished.

In another example, Table 4 may be changed as shown in Table 16 below.

In this case, the states mapped according to the values of HARQ-ACK (0), HARQ-ACK (1), and HARQ-ACK (2) may be as shown in Table 17 below.

HARQ-ACK (0), HARQ-ACK (1), HARQ-ACK (2) Mapped state ACK, ACK, any NACK, ACK ACK, NACK, ACK or NACK, NACK, ACK ACK, ACK ACK, DTX, DTX ACK, NACK other NACK, NACK

When mapped as shown in Table 17, the base station receiving HARQ-ACK information retransmits data transmitted through the third subframe, retransmits data transmitted through the first and second subframes, and 1 A case of retransmitting all data transmitted through the third to third subframes can be distinguished.

Tables 14 and 16 are provided as examples, and various methods of allocating some of the cases where the assigned mapping states are duplicated to the unused mapping state may be used.

4. 2 Serving cell Bundling window  For sizes 3 and 2

10 illustrates an example in which the size M _primary of the time domain bundling window of the PCell is 2 and the size M _secondary of the time domain bundling window of the SCell is 2. In this case, two HARQ-ACK states are selected for each serving cell using the time domain bundling table of Table 3 where M = 3, and based on this, the associated PUCCH resource (

), B (0) and b (1) can be used to perform PUCCH transmission.

Meanwhile, an example is described in which the size of the time domain bundling window of the PCell (M _primary ) is 3 and the size of the time domain bundling window of the SCell (M _secondary ) is 2, but the size of the time domain bundling window of the PCell (M _primary ) is 2. and can also be applied if the three-size (M _secondary) in the time domain bundling window SCell.

In case of SCell, HARQ-ACK (0) and HARQ-ACK (1) may have a value according to the measurement in the terminal, and HARQ-ACK (2) is set to DTX. Referring to Table 4, in this case, the mapped state may be as shown in Table 18 below.

HARQ-ACK (0), HARQ-ACK (1) HARQ-ACK (2) Mapped state ACK, ACK DTX NACK, ACK ACK, NACK DTX ACK, NACK NACK, ACK DTX NACK, NACK NACK, NACK DTX NACK, NACK

Referring to Table 18, when the HARQ-ACK (0) and the HARQ-ACK (1) measured by the UE are 'NACK, ACK', 'NACK, NACK', all of them are mapped to 'NACK, NACK'. have. In this case, the base station that receives the signal of 'NACK, NACK' through the PUCCH format 1b cannot determine whether the UE receives the correct data, and data transmitted through one downlink subframe out of two downlink subframes Even if received, the data transmitted through all downlink subframes is retransmitted.

In addition, in Table 18, it can be seen that 'ACK, ACK' is not used among the mapped states.

In order to overcome this problem, in one example, HARQ-ACK may be applied by changing 'NACK, ACK, DTX' to 'ACK, ACK, ACK', referring to Table 3, mapping to 'ACK, ACK' Can be. Alternatively, Table 3 may be changed as shown in Table 19 below.

In this case, the states mapped according to the values of HARQ-ACK (0) and HARQ-ACK (1) may be as shown in Table 20 below.

HARQ-ACK (0), HARQ-ACK (1) Mapped state ACK, ACK NACK / DTX, ACK ACK, NACK / DTX ACK, NACK / DTX NACK / DTX, ACK ACK, ACK NACK / DTX, NACK / DTX NACK / DTX, NACK / DTX

When mapped as shown in Table 20, when the base station receiving HARQ-ACK information does not retransmit data, when retransmitting only data transmitted through the second subframe, only the data transmitted through the first subframe is retransmitted. In this case, and retransmission of all data transmitted through the first and second subframes can be distinguished.

11 illustrates a HARQ-ACK transmission method according to an embodiment.

Referring to FIG. 11, the terminal reports terminal capability, that is, whether the terminal supports another TDD configuration (S1110).

The base station transmits the RRC signaling to the terminal (S1120). Information transmitted through the RRC signaling may include TDD UL-DL configuration information, carrier aggregation information, channel selection configuration information, HARQ-ACK format information, and the like. When a plurality of serving cells are configured, TDD UL-DL configuration may be different in each serving cell.

The terminal receives downlink data on a plurality of carriers from the base station (S1130), the terminal is a HARQ-ACK transmission method, scheduling mode, scheduling information, and the procedure for HARQ-ACK transmission according to the method proposed herein To perform (S1140). Detailed description of the step S1140 will be described later.

The UE performs PUCCH transmission according to the HARQ-ACK transmission procedure performed in step S1140 (S1150). That is, the terminal uses the state mapped in step S1140 PUCCH resources (

), B (0) and b (1) values can be derived and PUCCH transmission can be performed.

The base station receiving the PUCCH transmission from the terminal decodes the HARQ-ACK information in a method corresponding to the procedure performed in the terminal (S1160). The base station may perform decoding by recognizing the procedure performed by the terminal in step S1140.

12 illustrates in more detail the step S1140 of FIG. 11.

12, the sub-frame n, the number of the set K which is defined by the Table 1 by a TDD UL-DL set of PCell element (M _primary) and standard UL-DL set in SCell determined by Table 5 The terminal determines M (= max (M _primary , M _secondary )) from the number of elements M _secondary of the set K defined by Table 1 (S1205).

If M _secondary is smaller than M (YES in S1210), the terminal sets HARQ-ACK (j) to DTX for j = M _secondary to M-1 (S1215).

For PCell, time domain bundling is performed using Table 3 or Table 4 (S1220).

When mapping with SCell for time domain bundling, some mapped states are duplicated and some other mapped states are not used (for example, M _secondary is 2 and M is 4). , M _secondary is 3 and M is 4, or M _secondary is 2 and M is 3) (YES in S1225), the UE is HARQ-ACK (j) (j = 1 to M) of the values Change some to other values and apply time domain bundling to apply Tables 3 or 4, or change the HARQ-ACK (j) (j = 1 to M) from Tables 3 or 4 (e.g., table 9, 11, 14, 16, 19, etc.) to perform time domain bundling (S1230).

For example, if M _secondary is 2 and M is 4, then 'ACK, NACK, DTX, DTX' is changed to 'ACK, DTX, DTX, DTX' and / or 'NACK, ACK, DTX, DTX'is' ACK, ACK, ACK, and DTX '. If M _secondary is 3 and M is 4, 'ACK, NACK, any, DTX' may be changed to 'ACK, DTX, DTX, DTX'. If M _secondary is 2 and M is 3, 'NACK, ACK, DTX' can be changed to 'ACK, ACK, ACK'.

Alternatively, when M _secondary is 2 and M is 4, Table 9 or 11 may be applied. If M _secondary is 3 and M is 4, then Tables 14 or 16 can be applied. If M _secondary is 2 and M is 3, then Table 19 may apply.

On the other hand, if the throughput reduction is not expected in the SCell (NO in S1225), the UE performs time domain bundling using Table 3 or Table 4 (S1235).

If M _primary is smaller than M (NO in S1210, YES in S1240), the terminal sets HARQ-ACK (j) to DTX for j = M _primary to M-1 (S1245).

For the SCell, time domain bundling is performed using Table 3 or Table 4 (S1250).

When mapping with PCell through time domain bundling, some mapped states are duplicated and some other mapped states are not used (for example, M _primary is 2 and M is 4). When M _primary is 3 and M is 4, or M _primary is 2 and M is 3) (YES in S1255), the UE is HARQ-ACK (j) (j = 1 as in the above example). To M) and then perform time domain bundling of Tables 3 or 4, or HARQ-ACK (j) (j = 1 to M) from Tables 3 or 4 (eg For example, time domain bundling is performed by applying to Tables 9, 11, 14, 16, 19, etc. (S1260).

For example, when M _primary is 2 and M is 4, 'ACK, NACK, DTX, DTX' is changed to 'ACK, DTX, DTX, DTX' and / or 'NACK, ACK, DTX, DTX'is' ACK, ACK, ACK, and DTX '. If M _primary is 3 and M is 4, 'ACK, NACK, any, DTX' may be changed to 'ACK, DTX, DTX, DTX'. If M _primary is 2 and M is 3, 'NACK, ACK, DTX' may be changed to 'ACK, ACK, ACK'.

Alternatively, Table 9 or 11 may be applied when M _primary is 2 and M is 4. If M _primary is 3 and M is 4, then Table 14 or 16 may apply. Table 19 may be applied when M _primary is 2 and M is 3.

On the other hand, if the throughput reduction is not expected in the SCell (NO in S1255), the UE performs time domain bundling using Table 3 or Table 4 (S1265).

On the other hand, if the values of M _primary , M _secondary and M are all the same (No in S1210, NO in S1040), the terminal applies the table 3 or 4 to derive the mapping state (S1270).

13 is a block diagram showing a configuration of a terminal according to an embodiment.

Referring to FIG. 13, the terminal 1300 includes a receiver 1310 for receiving a downlink signal from a base station, a transmitter 1320 for transmitting an uplink signal to a base station, and a controller 1330.

The receiver 1310 may receive TDD UL-DL configuration information, carrier aggregation information, channel selection configuration information, HARQ-ACK format information, and the like from the base station through RRC signaling.

In addition, when transmission and reception through a plurality of carriers is set, the receiver 1310 may receive PDSCH scheduling on the plurality of carriers.

The controller 1330 performs a procedure for HARQ-ACK transmission according to the HARQ-ACK transmission method, scheduling mode, scheduling information, and the method proposed in the present specification.

In more detail, in sub-frame n, based on UL-DL set in the SCell is determined by the number of the set K which is defined by the Table 1 by a TDD UL-DL set of PCell element (M _primary) and Table 5 by from the number (M _secondary) of the elements of the set K which is defined by the Table 1, the control unit 1130 determines the M (= max (M _{primary, secondary} M)).

If M _secondary is smaller than M, controller 1330 sets HARQ-ACK (j) to DTX for j = M _secondary to M-1.

For PCell, time domain bundling is performed using Table 3 or Table 4.

When mapping with SCell for time domain bundling, some mapped states are duplicated and some other mapped states are not used (for example, M _secondary is 2 and M is 4). , M _secondary is 3 and M is 4, or M _secondary is 2 and M is 3), the controller 1330 determines some of the values of HARQ-ACK (j) (j = 1 to M). After changing to another value, apply time domain bundling by applying Tables 3 or 4, or change the HARQ-ACK (j) (j = 1 to M) from Tables 3 or 4 (e.g., Table 9, 11, 14, 16, 19, etc.) to perform time domain bundling.

For example, if M _secondary is 2 and M is 4, then 'ACK, NACK, DTX, DTX' is changed to 'ACK, DTX, DTX, DTX' and / or 'NACK, ACK, DTX, DTX'is' ACK, ACK, ACK, and DTX '. If M _secondary is 3 and M is 4, 'ACK, NACK, any, DTX' may be changed to 'ACK, DTX, DTX, DTX'. If M _secondary is 2 and M is 3, 'NACK, ACK, DTX' can be changed to 'ACK, ACK, ACK'.

Alternatively, when M _secondary is 2 and M is 4, Table 9 or 11 may be applied. If M _secondary is 3 and M is 4, then Tables 14 or 16 can be applied. If M _secondary is 2 and M is 3, then Table 19 may apply.

On the other hand, if the throughput reduction is not expected in the SCell, the controller 1130 performs time domain bundling using Table 3 or Table 4.

When M _primary is smaller than M, the controller 1330 sets HARQ-ACK (j) to DTX for j = M _primary to M-1.

For the SCell, time domain bundling is performed using Table 3 or Table 4.

When mapping with PCell through time domain bundling, some mapped states are duplicated and some other mapped states are not used (for example, M _primary is 2 and M is 4). If M _primary is 3 and M is 4, or if M _primary is 2 and M is 3, the controller 1330 performs HARQ-ACK (j) (j = 1 to M) as in the above-described example. Perform a time domain bundling of Tables 3 or 4 after changing some of the values of, or change the HARQ-ACK (j) (j = 1 to M) from Tables 3 or 4 (e.g., Table 9, 11, 14, 16, 19, etc.) to perform time domain bundling.

For example, when M _primary is 2 and M is 4, 'ACK, NACK, DTX, DTX' is changed to 'ACK, DTX, DTX, DTX' and / or 'NACK, ACK, DTX, DTX'is' ACK, ACK, ACK, and DTX '. If M _primary is 3 and M is 4, 'ACK, NACK, any, DTX' may be changed to 'ACK, DTX, DTX, DTX'. If M _primary is 2 and M is 3, 'NACK, ACK, DTX' may be changed to 'ACK, ACK, ACK'.

Alternatively, Table 9 or 11 may be applied when M _primary is 2 and M is 4. If M _primary is 3 and M is 4, then Table 14 or 16 may apply. Table 19 may be applied when M _primary is 2 and M is 3.

On the other hand, if the throughput reduction is not expected in the SCell, the controller 1330 performs time domain bundling using Table 3 or Table 4.

On the other hand, when the values of M _primary , M _secondary and M are all the same, the controller 1330 applies the table 3 or 4 to induce the mapping state.

As described above, when the mapping state is derived through time domain bundling, the controller 1330 uses the mapping state to determine the PUCCH resource (

), B (0) and b (1) values can be derived.

And, the transmitter 1320 is a PUCCH resource (

) And b (0), b (1) can be used to transmit HARQ-ACK information.

14 is a block diagram showing a configuration of a base station according to an embodiment.

Referring to FIG. 14, the base station 1400 includes a transmitter 1410, a receiver 1420, and a controller 1430.

The transmitter 1410 may transmit TDD UL-DL configuration information, carrier aggregation information, channel selection configuration information, HARQ-ACK format information, and the like to the terminal through RRC signaling.

In addition, when transmission and reception through a plurality of carriers is set, the transmitter 1410 may transmit PDSCH scheduling on the plurality of carriers.

The receiver 1420 may receive HARQ-ACK information from the terminal.

The controller 1430 decodes the HARQ-ACK information received by the receiver 1420 and determines whether to retransmit the data and the data to be retransmitted when the retransmission is determined according to the decoding result.

The control unit 1430 sets the number of elements (M _primary ) of the set K defined by Table 1 by the TDD UL-DL configuration of the PCell in a specific uplink subframe, and sets the reference UL-DL of the SCell determined by Table 5. M (= max (M _primary , M _secondary )) is determined from the number of elements M _secondary of the set K defined by Table 1.

In an example, when M = 3, the controller 1430 decodes the HARQ-ACK using Table 3, and when M = 4, the controller 1430 decodes the HARQ-ACK using Table 4.

When mapping via time domain bundling for a PCell or SCell, some HARQ-ACK states are duplicated and some other HARQ-ACK states are not used, so a decrease in throughput performance is expected (e.g., M _primary or M _{If secondary} is 2 and M is 4, M _primary or M _secondary is 3 and M is 4, or M _primary or M _secondary is 2 and M is 3), controller 1430 is the same as in the above example. As described above, it is determined whether HARQ-ACK (j) is changed and the original state is restored.

For example, when M _primary = 4, M _secondary = 2 and 'ACK, NACK' is received for the SCell, using Table 4, HARQ-ACK (j) (j = 0 to 3) is used as' ACK, DTX. , DTX, DTX ', and according to the description of the present specification for an example in which the bundling window sizes of two serving cells are 4 and 2, it can be seen that the original state is' ACK, NACK, DTX, DTX'. Accordingly, the controller 1230 may know that data transmitted in the second subframe should be retransmitted.

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 falling within the scope of the same shall be construed as falling within the scope of the present invention.

Claims (10)

A method of transmitting response information for downlink data by a terminal communicating with a base station through a first serving cell and a second serving cell having different time division duplex (TDD) settings,
Receiving downlink data in a downlink subframe of the first serving cell and the second serving cell from the base station; And
Transmitting response information for the downlink data received in the downlink subframe of the first serving cell and the second serving cell to an uplink subframe,
The response information on the downlink data is generated by performing time domain bundling on response data in one or more downlink subframes, and bundling a serving cell having a smaller bundling window among the first serving cell and the second serving cell. The size of the window is increased to the size of the bundling window of the serving cell having a larger bundling window size among the first serving cell and the second serving cell, and the increased data is set to DTX,
And at least some of the states mapped through the time domain bundling are overlapped and at least some of them are not used, changing at least some of the mapping relationships in the case of overlapping. The method according to claim 1,
When the bundling window size of one of the first serving cell and the second serving cell is 4 and the other bundling window size is 2, 'ACK, NACK' of the serving cell having the bundling window size 2 is 'ACK, DTX, DTX'. And response information transmission for downlink data, wherein time domain bundling is performed after changing to DTX '. 3. The method of claim 2,
And 'NACK, ACK' of the serving cell having a bundling window size of 2 is changed to 'ACK, ACK, ACK, DTX' and then time domain bundling is performed. The method according to claim 1,
When the bundling window size of one of the first serving cell and the second serving cell is 4 and the other bundling window size is 3, 'ACK, NACK, ACK' and 'ACK, NACK of the serving cell having the bundling window size 3 , NACK 'is changed to' ACK, DTX, DTX, DTX 'and then response information transmission method for downlink data, characterized in that time domain bundling is performed. The method according to claim 1,
When the bundling window size of one of the first serving cell and the second serving cell is 3 and the other bundling window size is 2, 'NACK, ACK' of the serving cell having the bundling window size 2 is 'ACK, ACK, ACK'. The response information transmission method for the downlink data, characterized in that time domain bundling is performed after the change to '. A terminal for communicating with a base station through a first serving cell and a second serving cell having different time division duplex (TDD) settings,
A receiver configured to receive downlink data in downlink subframes of the first serving cell and the second serving cell from the base station;
A transmitter for transmitting response information on the downlink data received in the downlink subframe of the first serving cell and the second serving cell to an uplink subframe; And
A control unit for generating response information on the downlink data by performing time domain bundling on response data in at least one downlink subframe,
The size of a bundling window of a serving cell having a smaller bundling window among the first serving cell and a second serving cell is a size of a bundling window of a serving cell having a larger bundling window among the first serving cell and the second serving cell. Incremented, the increased data is set to DTX,
And at least some of the states mapped through time domain bundling are overlapped and at least some are not used, the mapping relationship of at least some of the overlapped cases is changed. The method according to claim 6,
When the bundling window size of one of the first serving cell and the second serving cell is 4 and the other bundling window size is 2, 'ACK, NACK' of the serving cell having the bundling window size 2 is 'ACK, DTX, DTX'. And time domain bundling is performed after the change to DTX '. The method of claim 7, wherein
And 'NACK, ACK' of the serving cell having a bundling window size of 2 is changed to 'ACK, ACK, ACK, DTX' and then time domain bundling is performed. The method according to claim 6,
When the bundling window size of one of the first serving cell and the second serving cell is 4 and the other bundling window size is 3, 'ACK, NACK, ACK' and 'ACK, NACK of the serving cell having the bundling window size 3 , NACK 'is a terminal characterized in that time domain bundling is performed after changing to' ACK, DTX, DTX, DTX '. The method according to claim 6,
When the bundling window size of one of the first serving cell and the second serving cell is 3 and the other bundling window size is 2, 'NACK, ACK' of the serving cell having the bundling window size 2 is 'ACK, ACK, ACK'. Terminal after time domain bundling is performed.

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