KR20130073666A - Pdsch a/n transmitting method of user equipment, user equipment, pdsch a/n receiving method of base station, and base station - Google Patents

Abstract

PURPOSE: A transmitting method of PDSCH for a terminal, a terminal thereof, a receiving method of PDSCH A/N, and a base station thereof are provided to determine sources in which the response data to data reception is allocated when TDD settings of two element carrier waves are different in multiple carrier grouping environment. CONSTITUTION: A base station (1000) comprises a transmitter (1010), a receiver (1020), and a controller (1030). The transmitter transmits physical downlink shared channel (PDSCH) and PDCCH in a set downlink sub-frame. The receiver receives PDSCH ACK/NACK (A/C) through a specific uplink sub-frame in a specific element carrier wave. A controller extracts the PDSCH A/N of a first downlink sub-frame related to the specific uplink sub-frame which is determined based on time division duplex (TDD) of the specific element carrier wave. The controller extracts the PDSCH A/N of a second downlink sub-frame which does not belong to the first downlink sub-frame among the downlink sub-frames related to the specific uplink sub-frame which is determined based on a reference TDD setting of a terminal communicating by using multiple element carrier waves. [Reference numerals] (1010) Transmitter; (1020) Receiver; (1030) Controller

Description

PDSCH A / N transmission method of a terminal, PDSC A / N reception method of a terminal, a base station, and a base station {PDSCH A / N Transmitting Method of User Equipment, User Equipment, PDSCH A / N Receiving Method of Base Station, and Base Station}

The present invention relates to a system in which a base station and a terminal communicate with each other in a time division duplex (TDD) scheme with different configurations in interband.

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, a method of efficiently transmitting data through a plurality of element carriers can be used.

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 this case, the timing of transmitting response information for data reception may be changed according to a method of configuring uplink (UL) and downlink (DL) in the TDD system.

On the other hand, in a carrier aggregation (carrier aggregation, or carrier combining, "CA") environment that combines one or more component carriers (CC), the band to which each component carrier belongs may be different. have. That is, when carrier combining is performed in an interband manner, when the TDD settings of the respective bands are different, it is necessary to consider at what timing to transmit response information for data reception. In addition, consideration should be given to which resource response information should be allocated at that timing. Timing and resource allocation to transmit response information for data reception should be applicable to both the full-duplex mode and the half-duplex mode.

An object of the present invention is to provide a method and apparatus for determining a resource to which response information for data reception is allocated when a TDD configuration of two CCs in a multicarrier aggregation environment is different.

According to an embodiment of the present invention, for a specific uplink subframe, a first associated downlink subframe determined based on a time division duplex (TDD) configuration set in a primary cell, a primary cell and a secondary Searching for a first downlink subframe that is the same downlink subframe by comparing a second associated downlink subframe determined based on a reference TDD setting selected based on a TDD configuration of a secondary cell; An A / N (Ack / Nack) of a Physical Downlink Shared Channel (PDSCH) received in the first downlink subframe determines a resource allocated to the specific uplink subframe based on a TDD configuration configured in the primary cell Making; Among the second associated downlink subframes, a resource in which an A / N of a PDSCH received in a second downlink subframe not belonging to the first downlink subframe is allocated to the specific uplink subframe, is allocated to the first downlink. Determining a PDSCH A / N received in a subframe outside an allocated area; And mapping and transmitting PDSCH A / N to resources determined in an uplink subframe determined based on the reference TDD configuration.

Another embodiment of the present invention, the reception unit for receiving a PDSCH (Physical Downlink Shared Channel); For a specific uplink subframe, the TDD configuration of the first associated downlink subframe, the primary cell, and the secondary cell determined based on the time division duplex (TDD) configuration set in the primary cell. Search for a first downlink subframe that is the same downlink subframe by comparing a second associated downlink subframe determined based on the selected reference TDD configuration based on the A / D of the PDSCH received in the first downlink subframe; An N (Ack / Nack) determines a resource allocated to the specific uplink subframe based on a TDD configuration configured in the primary cell and does not belong to the first downlink subframe among the second associated downlink subframes. The A / N of the PDSCH received in the second downlink subframe does not allocate resources allocated to the specific uplink subframe. A controller for determining a PDSCH A / N received in a subframe outside an area to which an PDSCH is allocated; And a transmitter for mapping and transmitting PDSCH A / N to resources determined by the controller in an uplink subframe determined based on the reference TDD configuration.

Another embodiment of the present invention, receiving a Physical Downlink Shared Channel (PDSCH) A / N (Ack / Nack) on a specific uplink subframe on a specific component carrier; Extracting PDSCH A / N of a first downlink subframe related to the specific uplink subframe determined based on a time division duplex (TDD) configuration of the specific component carrier; And a PDSCH of a second downlink subframe not belonging to the first downlink subframe among downlink subframes related to the specific uplink subframe determined based on a reference TDD configuration of a terminal communicating using a plurality of CCs. It provides a PDSCH A / N reception method of the base station comprising the step of extracting the A / N.

According to another embodiment of the present invention, a receiver for receiving a physical downlink shared channel (PDSCH) A / N (Ack / Nack) on a specific uplink subframe in a specific component carrier; And a terminal for extracting PDSCH A / N of a first downlink subframe related to the specific uplink subframe determined based on a time division duplex (TDD) configuration of the specific component carrier and communicating using a plurality of component carriers. And a control unit for extracting PDSCH A / N of a second downlink subframe not belonging to the first downlink subframe among downlink subframes related to the specific uplink subframe determined based on a reference TDD configuration of the subframe. It provides a base station characterized by.

)은 다음의 식 1에 의해 결정될 수 있다.Resource to which PDSCH A / N of the first downlink subframe is allocated

) Can be determined by the following equation.

[Formula 1]

이고

의 식을 만족하며,

는 하향링크 자원 블록의 개수,

는 자원 블록에서 서브캐리어의 개수,

는 각 제 1 하향링크 서브프레임에서 PDSCH에 해당하는 제어정보를 전송하는 PDCCH(Physical Downlink Control Channel)의 전송을 위해 사용된 첫 번째 CCE(control channel elements)의 번호,

는 RRC로 전송되어 특정 목적을 위해서 사용되는 PUCCH format 1/1a/1b 자원의 수이고 여기서는 그 만큼의 오프셋값이 된다.In Equation 1, M is the number of the first downlink subframe, i is the index (0≤i≤M-1) of each first downlink subframe,

ego

Satisfies

Is the number of downlink resource blocks,

Is the number of subcarriers in the resource block,

Is the number of first control channel elements (CCEs) used for transmission of a physical downlink control channel (PDCCH) for transmitting control information corresponding to a PDSCH in each first downlink subframe,

Is the number of PUCCH format 1 / 1a / 1b resources that are transmitted to the RRC and used for a specific purpose. Here, the offset value is that much.

)은 다음의 식 2에 의해 결정될 수 있다.Resource to which PDSCH A / N of the second downlink subframe is allocated

) Can be determined by the following equation.

[Formula 2]

는 상기 제 1 하향링크 서브프레임에서 수신된 PDSCH의 A/N이 할당될 수 있는 전체 PUCCH format 1/1a/1b 자원의 개수이다. 여기서 위 값은 오프셋 값이 된다.In Equation 2, P is the number of the second downlink subframe, i is the index (0≤i≤P-1) of each second downlink subframe,

Is the total number of PUCCH format 1 / 1a / 1b resources to which A / N of the PDSCH received in the first downlink subframe can be allocated. Where the value is the offset value.

According to the present invention described above, when the TDD configuration of the two CCs in the multi-carrier aggregation environment is different, it is possible to determine the resource to transmit the response information for the data reception.

1 illustrates a wireless communication system to which embodiments of the present invention can be applied.
2 illustrates an interband CA environment according to an embodiment of the present specification.
3 shows an example in which different TDD settings are required in an interband to avoid interference with other TDD systems.
FIG. 4 is a diagram illustrating an operation method for each subframe when the terminal is in the half-duplex mode in the inter-band CA environment of FIG. 2.
FIG. 5 is a diagram illustrating an operation method for each subframe when the UE is in full-duplex mode in the inter-band CA environment of FIG. 2.
6 is a diagram illustrating a PDSCH A / N transmission scheme according to a reference TDD configuration.
7 illustrates a PDSCH A / N transmission method of an interband CA terminal according to an embodiment.
8 illustrates a PDSCH A / N reception method of a base station according to an embodiment.
9 is a block diagram illustrating a configuration of a terminal according to an embodiment.
10 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. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though 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 specification are applied.

Wireless communication systems are widely deployed to provide various communication services such as voice and packet data.

Referring to FIG. 1, a wireless communication system includes a user equipment (UE) 10 and a base station 20 performing uplink and downlink communication with the terminal 10.

In the present specification, the terminal 10 is a comprehensive concept of a terminal in a wireless communication. WCDMA, UE (User Equipment) in LTE, HSPA, etc., as well as MS (Mobile Station), User Interface (UT) in GSM, It should be interpreted as a concept that includes both a subscriber station (SS), a wireless device, and the like.

The base station 20 or cell generally refers to a station that communicates with the user terminal 10, and includes a base station (BS), a node-B (Node-B), and an evolved node-B (eNB). ), A sector, a site, a base transceiver system (BTS), an access point, an access node, and a relay node.

That is, in the present specification, the base station 20 or a cell is a generic term representing some areas or functions covered by a base station controller (BSC) in CDMA, a NodeB in WCDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as meaning, and it means to cover all the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell, radio resource head (RRH) and relay node communication range.

In the present specification, the user terminal 10 and the base station 20 are two transmitting and receiving entities used in implementing the technology or the technical idea described in the present specification and are used in a comprehensive sense and are not limited by the terms or words specifically referred to. Do not. The user terminal 10 and the base station 20 are two (uplink or downlink) transmission and reception subjects used in implementing the technology or the technical idea described in the present invention, which are used in a comprehensive sense and are specifically referred to terms or words. It is not limited by. Here, the uplink (Uplink, UL, or uplink) refers to a method for transmitting data to the base station 20 by the user terminal 10, the downlink (Downlink, DL, or downlink) is the base station 20 Means a method of transmitting data to the user terminal 10.

Although one terminal 10 and one base station 20 are shown in FIG. 1, the present invention is not limited thereto. It is possible for one base station 20 to communicate with the plurality of terminals 10, and also for one terminal 10 to communicate with the plurality of base stations 20.

There are no restrictions on multiple access schemes applied to wireless communication systems. 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. An embodiment of the present invention can be applied to asynchronous wireless communication that evolves into LTE and LTE-advanced via GSM, WCDMA, and HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB. The present invention should not be construed as limited to 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.

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.

Referring to FIG. 1, the terminal 10 and the base station 20 may perform uplink and downlink wireless communication.

In wireless communication, one radio frame (radioframe) consists of 10 subframes, and one subframe consists of two slots. The radio frame has a length of 10 ms and the subframe has a length of 1.0 ms. In general, a basic unit of data transmission is a subframe unit, and downlink or uplink scheduling is performed in units of subframes.

The base station 20 can perform downlink transmission to the terminal 10. [ The base station 20 may transmit a physical downlink shared channel (PDSCH) as a downlink data channel for unicast transmission. In addition, the base station 20 grants scheduling control for transmission on downlink control information such as scheduling required for reception of the PDSCH and on an uplink data channel (for example, a physical uplink shared channel (PUSCH)). Indicator for distinguishing a physical downlink control channel (PDCCH), a PDSCH and a region of the PDCCH as a downlink control channel used for transmitting downlink control information (DCI) including information Control of physical control format indicator channel (PCFICH) for transmission, physical HARQ indicator channel (PHICH) for transmission of hybrid automatic repeat request (HARQ) confirmation for uplink transmission The channel can be transmitted. Hereinafter, the transmission / reception of a signal through each channel will be described in a form in which the corresponding channel is transmitted / received.

The terminal 10 may perform uplink transmission to the base station 20. The terminal 10 may transmit a PUSCH as an uplink data channel. In addition, the terminal 10 requests resource allocation when transmitting data in HARQ acknowledgment (NACK) / negative ACK (NACK), channel status report, and uplink indicating whether the downlink transport block has been successfully received. A physical uplink control channel (PUCCH) as an uplink control channel used for transmitting uplink control information (UCI) including a scheduling request may be transmitted.

On the other hand, in TDD, downlink and uplink time points are divided. If various TDD configurations exist, these time points may also vary.

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.

[Table 1]

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 is a subframe (downlink-to-uplink switch-point periodicity) switched from downlink to uplink. For example, when the TDD UL-DL configuration is "1", when the subframe number is 0, 4, 5, 9, the downlink subframe is used, and when the subframe number is 2, 3, 7, 8 If the uplink is a subframe and the subframe numbers 1 and 6 are subframes that are switched from downlink to uplink.

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

The response to the data transmission transmitted in downlink, that is, A / N (Ack / Nack) for PDSCH, is transmitted from the terminal 10 to the base station 20 through an uplink subframe.

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 index (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.

[Table 2]

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.

For the A / N of the PDSCH transmitted in the downlink subframe nk _i (k _i PU K), the PUCCH resource is expressed by Equation 1 below.

[Equation 1]

는 서브프레임 (n-k_i)(k_i∈K)에서 전송된 PDSCH의 A/N이 전송되는 PUCCH 자원이다. M은 상향링크 서브프레임(n)에 관련된 하향링크 서브프레임의 개수이고, 0≤i≤M-1이다. c는 {0, 1, 2, 3}에서 선택되고,

의 식을 만족하며,

이고,

는 하향링크 자원 블록(resource block)의 개수,

는 자원 블록에서 서브캐리어(subcarrier)의 개수(예를 들면, 12)이며,

는 서브프레임 (n-k_i)에서 해당하는 PDCCH의 전송을 위해 사용된 첫 번째 CCE(control channel elements)의 번호이다. SR(Scheduling Request) 전송을 위해 예약된 PUCCH format 1/1a/1b 자원, ARI(Acknowledgement Resource Indication)에 의해 지시된 PUCCH format 1/1a/1b 자원, SPS(Semi-Persistent Scheduling) 전송을 위해 예약된 PUCCH format 1/1a/1b 자원 등을 이용하여 PUCCH format 1/1a/1b이 전송될 수 있고,

는 SR, ARI, SPS 등의 전송을 위해 예약된 PUCCH 포맷 1/1a/1b 자원을 나타내며 상위계층 시그널링에 의해 설정될 수 있다.In Equation 1,

Is a PUCCH resource to which A / N of PDSCH transmitted in subframe (nk _i ) (k _i ∈K) is transmitted. M is the number of downlink subframes associated with the uplink subframe n, and 0≤i≤M-1. c is selected from {0, 1, 2, 3},

Satisfies

ego,

Is the number of downlink resource blocks,

Is the number of subcarriers (eg, 12) in the resource block,

Is the number of the first CCE (control channel elements) used for transmission of the corresponding PDCCH in the subframe (nk _i ). PUCCH format 1 / 1a / 1b resource reserved for SR (Scheduling Request) transmission, PUCCH format 1 / 1a / 1b resource indicated by Acknowledgment Resource Indication (ARI), reserved for Semi-Persistent Scheduling (SPS) transmission PUCCH format 1 / 1a / 1b may be transmitted using a PUCCH format 1 / 1a / 1b resource, etc.

Represents a PUCCH format 1 / 1a / 1b resource reserved for transmission of SR, ARI, SPS, etc. and may be set by higher layer signaling.

(SR,ARI,SPS등이 전송되지 않음)인 경우를 가정한다. As an example, the system bandwidth is 10 MHz (50 Physical Resource Block (PRB)),

Assume the case of (SR, ARI, SPS, etc. not transmitted).

)은 다음의 표 3과 같다.If M = 1, the PUCCH resource according to the value of c (

) Is shown in Table 3 below.

[Table 3]

는 0~10이다. n_CCE가 11~26일 때 c=1이고

는 11~26이다. n_CCE가 27~43일 때 c=2이고

는 27~43이다. 그리고, n_CCE가 44~60일 때 c=3이고

는 44~60이다.Referring to Table 3, i = 0 when M = 1. n c = 0 when _CCE is 0 ~ 10

Is 0 to 10. n when _CCE is 11 ~ 26, c = 1

Is 11-26. n when _CCE is 27 ~ 43 c = 2

Is 27-43. And when n _CCE is 44 ~ 60 c = 3

Is 44-60.

)은 다음의 표 4와 같다.If M = 2, the PUCCH resource according to the value of c (

) Is shown in Table 4 below.

[Table 4]

는 0~10, i=1인 경우

는 11~21이다. n_CCE가 11~26일 때 c=0이고, i=0인 경우

는 22~37, i=1인 경우

는 38~53이다. n_CCE가 27~43일 때 c=0이고, i=0인 경우

는 54~70, i=1인 경우

는 71~87이다. 그리고, n_CCE가 44~60일 때 c=0이고, i=0인 경우

는 88~104, i=1인 경우

는 105~121이다.Referring to Table 4, i = 0,1 when M = 2. n When _cCE is 0 ~ 10, c = 0 and i = 0

Is 0 to 10, i = 1

Is 11-21. n When _cCE is 11 ~ 26, c = 0 and i = 0

Is 22 to 37, i = 1

Is 38-53. n When _cCE is 27 ~ 43, c = 0 and i = 0

Is between 54 and 70, i = 1

Is 71-87. And c = 0 and i = 0 when n _CCE is 44 to 60

Is between 88 and 104, i = 1

Is 105 to 121.

)은 다음의 표 5와 같다.If M = 3, the PUCCH resource according to the value of c (

) Is shown in Table 5 below.

[Table 5]

는 0~10, i=1인 경우

는 11~21, i=2인 경우

는 22~32이다. n_CCE가 11~26일 때 c=1이고, i=0인 경우

는 33~48, i=1인 경우

는 49~64, i=2인 경우

는 65~80이다. n_CCE가 27~43일 때 c=2이고, i=0인 경우

는 81~97, i=1인 경우

는 98~114, i=2인 경우

는 115~131이다. n_CCE가 44~60일 때 c=3이고, i=0인 경우

는 132~148, i=1인 경우

는 149~165, i=2인 경우

는 166~182이다.Referring to Table 5, i = 0,1,2 when M = 3. n When _cCE is 0 ~ 10, c = 0 and i = 0

Is 0 to 10, i = 1

Is 11 ~ 21, i = 2

Is 22-32. n When _cCE is 11 ~ 26, c = 1 and i = 0

Is 33 to 48, i = 1

Is 49 to 64, i = 2

Is 65 to 80. n When _CCE is 27 ~ 43, c = 2 and i = 0

Is 81--97, i = 1

Is 98 ~ 114, i = 2

Is 115-131. n When _cCE is 44 ~ 60, c = 3 and i = 0

Is 132-148, i = 1

Is 149-165, i = 2

Is 166-182.

)은 다음의 표 6과 같다.If M = 4, the PUCCH resource according to the value of c (

) Is shown in Table 6 below.

TABLE 6

는 0~10, i=1인 경우

는 11~21, i=2인 경우

는 22~32, i=3인 경우

는 33~43이다. n_CCE가 11~26일 때 c=1이고, i=0인 경우

는 44~59, i=1인 경우

는 60~75, i=2인 경우

는 76~91, i=3인 경우

는 92~107이다. n_CCE가 27~43일 때 c=2이고, i=0인 경우

는 108~124, i=1인 경우

는 125~141, i=2인 경우

는 142~158, i=3인 경우

는 159~175이다. n_CCE가 44~60일 때 c=3이고, i=0인 경우

는 176~192, i=1인 경우

는 193~209, i=2인 경우

는 210~226, i=3인 경우

는 227~243이다.Referring to Table 6, i = 0,1,2,3 when M = 3. n When _cCE is 0 ~ 10, c = 0 and i = 0

Is 0 to 10, i = 1

Is 11 ~ 21, i = 2

Is 22-32, i = 3

Is 33-43. n When _cCE is 11 ~ 26, c = 1 and i = 0

Is 44--59, i = 1

Is 60 to 75, i = 2

Is 76 ~ 91, i = 3

Is 92-107. n When _CCE is 27 ~ 43, c = 2 and i = 0

Is 108-124, i = 1

Is 125 to 141, i = 2

Is 142-158 when i = 3

Is 159 to 175. n When _cCE is 44 ~ 60, c = 3 and i = 0

Is 176-192, i = 1

Is 193-209, i = 2

Is 210 to 226 when i = 3

Is 227-243.

Tables 3 to 6 show examples when the value of M is 1 to 4, but M may have a value of 9 (up to the case of subframe 2 at the UL-DL setting of 5). However, when the UL-DL configuration is 5, only A / N bundling mode can be transmitted using PUCCH format 1 / 1a / 1b.

Using the above-described method using Equation 1, A / N for PDSCH transmitted in several downlink subframes transmitted in one uplink subframe in a TDD system can be derived without collision. The above-described method may be used among a plurality of terminals using the same uplink subframe for PDSCH A / N transmission.

Meanwhile, in a multicarrier aggregation (CA) environment in which one or more component carriers (CCs) are combined, bands to which each component carrier belongs may be different. When carrier combining is performed in an inter-band manner, the TDD configuration may be configured differently for each band. However, there is a case in which one terminal uses carriers included in these differently configured bands. Hereinafter, such a terminal will be referred to as an interband CA terminal.

2 is a diagram illustrating an inter-band CA environment according to an embodiment of the present specification.

System 210 shows that two component carriers are configured, CC1 211 is a carrier py with coverage of signals transmitted from eNB at high power, and CC2 212 is eNB at low power. A carrier having coverage of a signal transmitted from the. CC1 211 and CC2 212 may be included in different bands. The TDD UL-DL configuration of CC1 211 is shown in Table 1 above as "281" in FIG. 2, and the TDD UL-DL configuration of CC2 212 is shown as "282" in FIG. 2 as 2. . At this time, CA configuration is possible for terminals in the CC2 (212) coverage. Meanwhile, the hot spot area 215 may be configured as a CA environment of the CC1 211 and the CC2 212.

An interband CA terminal communicating with a base station in a CA environment may perform communication through CCs having different TDD settings (eg, CC1 211 and CC2 212).

For example, other TDD UL-DL configurations may be used in the inter-band for traffic adaptation purposes.

For another example, referring to FIG. 3, a TDD system (eg, to avoid interference with other TDD systems (eg, TDS-CDMA 310, LTE 320) that coexist in the same band. The TDD uplink-downlink of the LTE-A 330 and 340 is configured, and thus, the TDD system may require different TDD UL-DL configurations in the inter-band. That is, in the example of FIG. 3, LTE-A 330 in band A 410 has a TDD UL-DL setting of “2” to avoid interference with TDS-CDMA 310, and band B 420. LTE-A 340 has a TDD UL-DL setting of "0" in order to avoid interference with LTE 320, and thus LTE-A 330 and LTE-A 340 located in different bands The TDD UL-DL configuration may be different from each other.

For another example, the uplink subframe may follow many TDD UL-DL configurations in the low frequency band, and the downlink subframe may follow the TDD UL-DL configurations in the high frequency band. This can help increase coverage.

The above 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. 4 is a diagram illustrating an operation method for each subframe in the case of a half-duplex mode on a collision subframe that may occur due to different TDD settings configured between interbands in the interband CA environment of FIG. 2. In the example of FIG. 4, the primary cell (PCell) follows the TDD UL-DL configuration "1" and the secondary cell (SCell) follows the TDD UL-DL configuration "2". In FIG. 4, 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. 4, 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. 4, when the subframe numbers are 3 and 8, the uplink subframe of the PCell is a subframe muted.

The uplink control channel (PUCCH) including the A / N for the PDSCH (PDSCH A / N) may be transmitted only through the PCell. Hereinafter, 'PDSCH A / N' will be 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. 4, 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 CC1 is a muted subframe when the subframe numbers are 3 and 8, PDSCH A / which is transmitted to a downlink subframe having subframe number 9 through a subframe having 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.

FIG. 5 is a diagram illustrating an operation method for each subframe when the UE is in full-duplex mode in the inter-band CA environment of FIG. 2. In FIG. 5, the PCell follows the TDD UL-DL configuration "1" and the SCell follows the TDD UL-DL configuration "2". In FIG. 5, 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. 5, 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 including 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. 5, 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 for transmitting the PDSCH A / N is not set for the case where the subframe numbers are 3 and 8.

As described above, when different TDD UL-DL configurations are used in a plurality of CCs, a problem may occur in which PDSCH A / N transmission timing according to Table 2 cannot be used.

To overcome this problem, a reference TDD configuration for PDSCH A / N transmission timing may be used.

In the present specification, the reference TDD configuration includes (1) comparing two different TDD UL-DL configurations configured in the PCell and the SCell, and (2) searching for a common uplink subframe in the two TDD UL-DL configurations; (3) searching for one or more reference TDD settings belonging to the common uplink subframe by the uplink subframe that transmits PDSCH A / N, and (4) specific to the UE from one or more reference TDD settings. It may be obtained by the base station (and / or the terminal) through the step of selecting the reference TDD configuration. The reference TDD setting specific to the obtained terminal may be transmitted from the base station to the terminal through a downlink signal such as Radio Resource Control (RRC) or PDSCH.

Alternatively, the reference TDD setting is made by performing the steps (1) to (3) described above for all cases where the TDD UL-DL setting of the PCell and the TDD UL-DL setting of the SCell are different from each other. 7), (2 ') retrieving one or more reference TDD settings by applying the TDD UL-DL configuration of the PCell and the TDD UL-DL configuration of the SCell to Table 7, and (3') one or more reference TDDs It may be obtained by the base station (and / or terminal) through the step of selecting a reference TDD configuration specific to the terminal from the configuration. The reference TDD configuration specific to the obtained terminal may be transmitted from the base station to the terminal through a downlink signal such as RRC or PDSCH.

[Table 7]

For example, when the TDD UL-DL configuration of the PCell (CC0) is 0 and the TDD UL-DL configuration of the SCell (CC1) is 1, use the steps of (1) to (3) described above or Table 7 If used, one or more reference TDD settings are 1, 2, 4, and 5, and the base station selects one of these values (for example, 1) as the reference TDD setting specific to the terminal. The base station transmits the selected reference TDD configuration information to the terminal.

Upon receiving the reference TDD configuration information, the uplink-downlink communication timing in the PCell CC0 follows the case of the TDD UL-DL configuration 0 in Table 1, and the uplink-downlink communication timing in the SCell CC1 is According to the case of TDD UL-DL configuration 1 in Table 1, the timing of PDSCH A / N transmission in the PCell (CC0) may follow the reference TDD configuration 1 in Table 2.

FIG. 6 is a diagram illustrating PDSCH A / N transmission according to a reference TDD configuration. The TDD UL-DL configuration of the PCell CC0 of the first UE is 0, the TDD UL-DL configuration of the SCell CC1 is 1, and A case where the TDD setting is 1 is shown. When the reference TDD setting is 1, referring to Table 2, M = 2 with K = {7,6} when n = 2, M = 1 with K = {4} when n = 3, and n = M = 2 with K = {7,6} when 7 and M = 1 with K = {4} when n = 8.

In subframe 2 of PCell CC0, PDSCH A / N of subframes 5 and 6 of PCell CC0 and SCell CC1 may be transmitted.

In subframe 3 of PCell CC0, PDSCH A / N of subframe 9 of SCell CC1 may be transmitted. Since subframe 9 of the PCell CC0 is an uplink subframe, PDSCH A / N of subframe 9 of the PCell is not transmitted.

In subframe 7 of the PCell CC0, PDSCH A / N of subframes 0 and 1 of the PCell CC0 and the SCell CC1 may be transmitted.

In subframe 8 of the PCell CC0, A / N for the PDSCH transmitted in subframe 4 of the SCell CC1 may be transmitted. Since subframe 4 of the PCell CC0 is an uplink subframe, PDSCH A / N of subframe 4 of the PCell is not transmitted. If the UE is in the half-duplex mode and subframe 4 of the SCell is muted, PDSCH A / N of subframe 4 of the SCell may not be transmitted.

Meanwhile, in a wireless communication system, a terminal using only one CC and not using CA technology may exist simultaneously. The terminal that does not use the CA technology may be a legacy terminal that cannot use the CA technology or a terminal that uses the CA technology but does not use the CA technology by setting. Hereinafter, for convenience of description, it will be referred to as a legacy terminal. In FIG. 6, the second terminal communicates with using CC0 and does not use CC1.

The second terminal communicates with the base station according to the TDD UL-DL configuration 0. That is, uplink-downlink communication timing follows TDD UL-DL configuration 0 in Table 1, and PDSCH A / N transmission follows TDD UL-DL configuration 0 in Table 2.

In the case of the TDD UL-DL setting 0, referring to Table 2, M = 1 when K = {6} when n = 2, M = 1 when K = {4} when n = 4, and n = 7 When M = K = {6} and M = 1 when K = {4}.

In subframe 2, PDSCH A / N of subframe 6 may be transmitted. In subframe 4, PDSCH A / N of subframe 0 may be transmitted. In subframe 7, PDSCH A / N of subframe 1 may be transmitted. In subframe 9, PDSCH A / N of subframe 5 may be transmitted.

As described above, when the first terminal using the CA technology and the second terminal not using the CA technology transmit PDSCH A / N on the same CC (CC0), the PUCCH resource to which the PDSCH A / N information is transmitted is May crash.

For example, in subframes 2 and 7 of the first terminal, M = 2, thus, PUCCH resources of the first terminal may be allocated by substituting M = 2 in Equation 1. In contrast, M = 1 in subframes 2 and 7 of the second terminal, and thus, PUCCH resources of the second terminal may be allocated by substituting M = 1 in Equation 1. In this case, since the first terminal and the second terminal allocates the PUCCH resources using different M values, their PUCCH resources may collide.

인 경우, 제 1 단말의 서브프레임 2 및 7의 PUCCH 자원은 표 4와 같이 할당되고, 제 2 단말의 서브프레임 2 및 7의 PUCCH 자원은 표 3과 같이 할당된다. For example, the system bandwidth is 10MHz,

In this case, PUCCH resources of subframes 2 and 7 of the first terminal are allocated as shown in Table 4, and PUCCH resources of subframes 2 and 7 of the second terminal are allocated as shown in Table 3.

)은 22일 수 있다. 한편, 제 2 단말에 대해 서브프레임 6에서 PDSCH가 전송되고 PDSCH에 해당하는 PDCCH의 전송에 사용된 첫 번째 CCE가 22인 때, 표 3을 참조하면, c는 1, i는 0, PDSCH A/N이 할당되는 PUCCH 자원(

)은 22일 수 있다. 이러한 경우, 두 개의 PDSCH A/N이 동일한 PUCCH 자원을 통해 전송되어 충돌하게 된다.When the PDSCH is transmitted in subframe 5 for the first UE and the first CCE used for the transmission of the PDCCH corresponding to the PDSCH is 11, referring to Table 4, c is 1, i is 0, and PDSCH A / N is PUCCH resources allocated (

) May be 22. Meanwhile, when the PDSCH is transmitted in subframe 6 for the second UE and the first CCE used for the transmission of the PDCCH corresponding to the PDSCH is 22, referring to Table 3, c is 1, i is 0, and PDSCH A / PUCCH resource to which N is allocated (

) May be 22. In this case, two PDSCH A / Ns are transmitted through the same PUCCH resource and collide with each other.

Such a PUCCH collision may occur when the reference TDD configuration of the UE using CA technology is different from the TDD UL-DL configuration of the PCell. Highlighted in Table 8 below shows a case in which a PUCCH collision may occur.

[Table 8]

In addition, the PUCCH collision may occur even when the reference TDD settings of a plurality of terminals using CA technology are different. For example, in the plurality of terminals, the PCell may be set identically and the SCell may be set differently, and in this case, the reference TDD settings may be different. Alternatively, although the PCell and the SCell are set to be the same in the plurality of terminals, the reference TDD setting selected according to the environment of the terminal may be different. In this case, there is a possibility that a PUCCH collision occurs between a plurality of terminals.

7 illustrates a PDSCH A / N transmission method of an interband CA terminal according to an embodiment.

Referring to FIG. 7, the PDSCH A / N transmission method may include checking TDD configuration information set in an interband CA terminal (S710) and comparing PDSCH A / N timing set in a legacy terminal and an interband CA terminal ( S720, searching for the same downlink subframe associated with the same uplink subframe specific to the legacy UE and the interband CA UE (S730), and for the same downlink subframe, using the equation 1 in PDSCH A / Allocating N resources (S740), Allocating PDSCH A / N resources by using a rule (Equation 2 to be described later) in the case of subframes other than the same downlink subframe (Equation 2 to be described later) S750) and transmitting the PDSCH A / N to the allocated resource (S760).

The interband CA terminal checks the set TDD configuration information (S710). The TDD configuration information may include full-duplex mode or half-duplex mode configuration information, TDD UL-DL configuration information in the PCell and the SCell, reference TDD configuration information indicating PDSCH A / N transmission timing information, and the like. The reference TDD configuration information may be transmitted from the base station through RRC (Radio Resource Control) or PDCCH, and the interband CA terminal may receive the reference TDD configuration information to confirm the reference TDD configuration. Alternatively, a rule for selecting a reference TDD setting may be previously set and shared between the base station and the interband CA terminal, and the interband CA terminal may be identified using the preset rule.

The interband CA terminal compares PDSCH A / N timings set in the legacy terminal and the interband CA terminal (S720). The PDSCH A / N timing configured in the legacy terminal may be determined using the TDD UL-DL configuration set in the PCell and Table 2. The PDSCH A / N timing set in the interband CA terminal may be determined using the checked reference TDD configuration and Table 2.

For example, assume that the TDD UL-DL configuration of the PCell is 0, the TDD UL-DL configuration of the SCell is 1, and the reference TDD configuration is 1. For legacy UE using PCell, TDD UL-DL configuration is 0. Referring to Table 2, K = {6} (M is 1) in subframe 2 and K = {4} (M is 1 in subframe 4). ), K = {6} (M is 1) in subframe 7, and K = {4} (M = 1) in subframe 9. For the interband CA terminal, the reference TDD configuration is 1, and referring to Table 2, K = {7, 6} (M is 2) in subframe 2 and K = {4} (M is 1) in subframe 3 , K = {7, 6} (M is 2) in subframe 7, and K = 4 (M is 1) in subframe 8.

In subframes 3 and 8, the interband CA UE transmits PDSCH A / N, but the legacy UE does not transmit PDSCH A / N. In subframes 3 and 8, the PUCCH resources do not collide. Therefore, in subframes 3 and 8, PUCCH resources may be allocated using Equation 1 described above.

Since the M value of the legacy UE is 1 and the M value of the interband CA UE is 2 in subframes 2 and 7, there is a possibility that PUCCH resources collide in subframes 2 and 7.

Next, the interband CA terminal searches for the same downlink subframe associated with the same uplink subframe specific to the legacy terminal and the interband CA terminal (S730). When the interband CA terminal uses the above-described reference TDD configuration, the same downlink subframe is the same as the downlink subframe configured in the legacy terminal. Downlink communication may be performed on some resources of the special subframe S that is switched from downlink to uplink. In the present specification, the downlink subframe includes a special subframe S in addition to the downlink subframe D. Include.

In an example in which the TDD UL-DL configuration of the PCell is 0, the TDD UL-DL configuration of the SCell is 1, and the reference TDD configuration is 1, the legacy UE in subframe 2 is the A / N of the PDSCH transmitted in subframe 6. And the interband CA terminal transmits the A / N of the PDSCH transmitted in subframes 5 and 6, the same downlink subframe associated with subframe 2 is subframe 6 (or n-6), and is not the same. The downlink subframe is 5 (or n-7). In subframe 7, since the legacy terminal transmits the A / N of the PDSCH transmitted in subframe 1 and the interband CA terminal transmits the A / N of the PDSCH transmitted in subframes 0 and 1, the same downlink associated with subframe 6 The link subframe is subframe 1 (or n-6) and non-identical downlink subframes are 0 (or n-7).

The interband CA terminal allocates PDSCH A / N resources by using Equation 1 in the case of the same downlink subframe (S740). In this case, the value of M used in Equation 1 is determined by the TDD UL-DL configuration of the PCell (that is, the TDD UL-DL configuration of the legacy terminal).

In the example in which the TDD UL-DL configuration of the PCell is 0, the TDD UL-DL configuration of the SCell is 1, and the reference TDD configuration is 1, in the case of subframe 2, transmission is performed through subframe 6, which is the same downlink subframe. The A / N of the PDSCH is determined by substituting M = 1 in Equation 1. In this case, the PUCCH resource for PDSCH A / N of downlink subframe 6 of the interband CA UE transmitted in subframe 2 does not collide with the PUCCH resource for PDSCH A / N of downlink subframe 6 of the legacy UE. .

In the case of subframe 7, A / N of PDSCH transmitted through subframe 1, which is the same downlink subframe, is determined by substituting M = 1 in Equation 1. In this case, the PUCCH resource for PDSCH A / N of downlink subframe 1 of the interband CA terminal transmitted in subframe 7 does not collide with the PUCCH resource for PDSCH A / N of downlink subframe 1 of the legacy terminal. .

The interband CA terminal allocates PDSCH A / N resources using a rule applied only to the interband CA terminal in the case of subframes other than the same downlink subframe (S750). The rule applied only to the interband CA terminal may be as shown in Equation 2 below.

&Quot; (2) "

In Equation 2, P is the number of remaining subframes other than the same downlink subframe among the downlink subframes associated with the uplink subframe. When the number of downlink subframes associated with the uplink subframe is M 'and the number of the same downlink subframe (or the number of downlink subframes in the legacy UE) is M, P = M'-M. In the above example, since the number M 'of downlink subframes associated with subframes 2 and 7 is 2 and the number of the same downlink subframes is 1, P = 1.

는 상술한 S740 단계에서 동일한 하향링크 서브프레임에 대해 할당된 PUCCH 자원의 수를 나타내는 오프셋이다. 수학식 1을 참조하면,

로 결정되고, 이는 하나의 하향링크 서브프레임에서 CCE를 기반으로 유도할 수 있는 자원의 총 수(N_CCE)와 같다. 그 값에 동일한 하향링크 서브프레임의 수(M)을 곱하여 동일한 하향링크 서브프레임에 대해 할당된 PUCCH 자원의 수를 구할 수 있다.

Is an offset indicating the number of PUCCH resources allocated for the same downlink subframe in step S740. Referring to Equation 1,

This is equal to the total number of resources (N _CCE ) that can be derived based on CCE in one downlink subframe. The number of PUCCH resources allocated to the same downlink subframe may be obtained by multiplying the value M by the same number of downlink subframes.

인 경우 N _{c = 4}의 값은 61이다(표 3 참조).In the example in which the TDD UL-DL configuration of the PCell is 0, the TDD UL-DL configuration of the SCell is 1, and the reference TDD configuration is 1, P = 1 because M '= 2 and M = 1. System bandwidth is 10 MHz,

The value of N _{c = 4} is 61 (see Table 3).

In this case, the PUCCH resources for the PDSCH A / N obtained in step S740 and the PUCCH resources for the PDSCH A / N obtained in step S750 may be summarized in the following Tables 9 and 10, respectively. Table 9 is the same as Table 3 described above.

TABLE 9

[Table 10]

Referring to Tables 9 to 10, PDSCH A / N of subframe 6 of an interband CA terminal transmitted in subframe 2 is allocated to PUCCH resources 0 to 60, and PDSCH A / N of subframe 5 is PUCCH resources 61 to 121. Is assigned to. The PDSCH A / N of subframe 1 of the interband CA terminal transmitted in subframe 7 is allocated to PUCCH resources 0 to 60, and the PDSCH A / N of subframe 0 is allocated to PUCCH resources 61 to 121.

Meanwhile, PDSCH A / N of subframe 6 of the legacy UE transmitted in subframe 2 is allocated to PUCCH resources 0 to 60, which does not collide with the PUCCH resource of the interband CA UE. And, the PDSCH A / N of subframe 1 of the legacy UE transmitted in subframe 7 is allocated to PUCCH resources 0 to 60, which does not collide with the PUCCH resource of the interband CA UE.

The interband CA terminal transmits the PUCCH by allocating PDSCH A / N to resources obtained in steps S740 and S750 (S760).

In the above-described embodiment, the steps are described in the order of steps S750 and S760, but this is for convenience of description and may be executed in the order of steps S760 and S750, or the steps S750 and S760 may be simultaneously executed.

8 illustrates a PDSCH A / N reception method of a base station according to an embodiment.

Referring to FIG. 8, in a PDSCH A / N reception method of a base station, receiving a PUCCH transmitted by a terminal (S810), a legacy UE and an interband CA among downlink subframes related to an uplink subframe receiving the PUCCH. PDSCH A / N transmitted by the legacy terminal and PDSCH A / transmitted by the interband CA terminal from a region where PDSCH A / N of the same downlink subframe (that is, downlink subframe set in the legacy terminal) is allocated between the terminals. Extracting N (S820), and a downlink subframe that is not the same between the legacy UE and the interband CA UE among downlink subframes related to the uplink subframe receiving the PUCCH (that is, not set in the legacy UE) Extracting the PDSCH A / N transmitted by the interband CA terminal from the region allocated to the PDSCH A / N of the downlink subframe or the downlink subframe additionally set in the interband CA terminal Step S830 is included.

The base station receives the PUCCH through a specific uplink subframe (S810).

Next, the base station transmits the legacy terminal and the interband CA terminal from the region in which PDSCH A / N of the same downlink subframe is allocated between the legacy terminal and the interband CA terminal among the downlink subframes related to the specific uplink subframe. One PDSCH A / N is extracted (S820). When the interband CA terminal uses the above-described reference TDD configuration, the same downlink subframe is the same as the downlink subframe configured in the legacy terminal.

내지

이고, 이 범위 내에서 레거시 단말 및 인터밴드 CA 단말이 전송한 PDSCH A/N을 추출할 수 있다. 이 영역에서 인터밴드 CA 단말이 전송한 PDSCH A/N은 상기 동일한 하향링크 서브프레임을 통해 인터밴드 CA 단말이 수신한 PDSCH에 대한 A/N이다.In this case, it can be known by using Equation 1 which PDSCH A / N is allocated to each PUCCH resource. Referring to Equation 1, a resource region to which PDSCH A / N of the same downlink subframe is allocated

To

In this range, the PDSCH A / N transmitted by the legacy terminal and the interband CA terminal can be extracted. The PDSCH A / N transmitted by the interband CA terminal in this region is the A / N for the PDSCH received by the interband CA terminal through the same downlink subframe.

The base station transmits a PDSCH transmitted by an interband CA terminal from a region in which PDSCH A / N of a downlink subframe that is not identical is allocated between a legacy terminal and an interband CA terminal among downlink subframes related to a specific uplink subframe. Extract A / N (S830). When the interband CA terminal uses the above-described reference TDD configuration, the non-identical downlink subframe is a downlink subframe not configured in the legacy terminal or a downlink subframe additionally configured in the interband CA terminal.

이상이고, 이 범위 내에서 인터밴드 CA 단말이 전송한 PDSCH A/N을 추출할 수 있다. 이 영역에서 인터밴드 CA 단말이 전송한 PDSCH A/N은 상기 동일하지 않은 하향링크 서브프레임을 통해 인터밴드 CA 단말이 수신한 PDSCH에 대한 A/N이다.In this case, it is possible to know what PDSCH A / N is allocated to each PUCCH resource using Equation 2. Referring to Equation 2, a resource region to which PDSCH A / Ns of unequal downlink subframes are allocated

As described above, the PDSCH A / N transmitted by the interband CA terminal can be extracted within this range. The PDSCH A / N transmitted by the interband CA terminal in this region is the A / N for the PDSCH received by the interband CA terminal through the same downlink subframe.

In the above-described embodiment, the steps are described in the order of steps S820 and S830, but this is for convenience of description, and may be performed in the order of steps S830 and S820, or the steps S820 and S830 may be simultaneously executed.

9 is a block diagram illustrating a configuration of a terminal according to an embodiment.

Referring to FIG. 9, the terminal 900 includes a receiver 910, a transmitter 920, and a controller 930. The terminal 900 illustrated in FIG. 9 is an interband CA terminal.

The receiver 910 receives the PDSCH and the PDCCH in the configured downlink subframe. The downlink subframe may be determined based on the TDD UL-DL configuration and Table 1.

The controller 930 performs steps S710 to S750 of FIG. 7 to allocate a PUCCH resource for the PDSCH A / N. That is, the controller 930 confirms the reference TDD configuration, and identifies the PDSCH A / N transmission uplink subframe according to the TDD UL-DL configuration and the PDSCH A / N transmission uplink subframe according to the reference TDD configuration in the PCell. The same downlink subframe is found between the legacy UE and the interband CA UE among downlink subframes related to a specific uplink subframe transmitting PDSCH A / N, and the same downlink subframe is represented by Equation 1 below. Resource for PDSCH A / N is set, and resources for PDSCH A / N are set using Equation 2 for downlink subframes that are not identical.

The transmitter 920 maps the PDSCH A / N to resources set by the controller 930 using Equations 1 and 2 in an uplink subframe determined by the reference TDD.

10 is a block diagram illustrating a configuration of a base station according to an embodiment.

Referring to FIG. 10, the base station 1000 includes a transmitter 1010, a receiver 1020, and a controller 1030.

The transmitter 1010 transmits a PDSCH and a PDCCH in a configured downlink subframe. The downlink subframe may be determined based on the TDD UL-DL configuration and Table 1.

The receiver 1020 receives the PDSCH A / N through the PUCCH in the configured uplink subframe. The timing of the PDSCH A / N transmitted from the legacy terminal may be determined based on the TDD UL-DL configuration and Table 2, and the timing of the PDSCH A / N transmitted from the interband CA terminal is based on the reference TDD configuration and Table 2 Can be determined.

The controller 1030 uses the equation (1) from the region where the PDSCH A / N of the same downlink subframe is allocated between the legacy terminal and the interband CA terminal, and transmits the PDSCH A / N transmitted by the legacy terminal and the interband CA terminal. The PDSCH A / N transmitted by the interband CA terminal is extracted using Equation 2 from the region in which PDSCH A / N of the same downlink subframe is allocated between the legacy terminal and the interband CA terminal. Thus, the base station 1000 may check whether the terminal receives the PDSCH.

The above embodiment may be applied to the case of the PUCCH format 1 / 1a / 1b for transmitting PDSCH A / N. Meanwhile, in the case of PUCCH format 3, in a situation where only DAI (Downlink Assignment Index) is 1 in k _{m m} K, PUCCH format 1a / 1b transmission may be used without using resources of PUCCH format 3. In this case, the PUCCH resource collision problem between the legacy terminal on the PCell and the interband CA terminal as described above may occur. That is, the PUCCH resources for the associated downlink subframe (M = 1) having the DAI = 1 of the legacy terminal and the PUCCH resources of the interband CA terminal may collide with each other. Even in this case, the above-described embodiments may be applied.

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 protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (14)

For a specific uplink subframe, a first associated downlink subframe determined based on a time division duplex (TDD) configuration set in a primary cell, and a TDD configuration of a primary cell and a secondary cell. Searching for a first downlink subframe that is the same downlink subframe by comparing a second associated downlink subframe determined based on a reference TDD configuration selected based on the second downlink subframe;
An A / N (Ack / Nack) of a Physical Downlink Shared Channel (PDSCH) received in the first downlink subframe determines a resource allocated to the specific uplink subframe based on a TDD configuration configured in the primary cell Doing;
Among the second associated downlink subframes, a resource in which an A / N of a PDSCH received in a second downlink subframe not belonging to the first downlink subframe is allocated to the specific uplink subframe, is allocated to the first downlink. Determining a PDSCH A / N received in a subframe outside an allocated area; And
And mapping and transmitting PDSCH A / N to resources determined in an uplink subframe determined based on the reference TDD configuration. The method of claim 1,
Resource to which A / N of PDSCH received in the first downlink subframe is allocated

) Is determined by Equation 1 below.
[Formula 1]

In Equation 1, M is the number of the first downlink subframe, i is the index (0≤i≤M-1) of each first downlink subframe,

ego

Satisfies

Is the number of downlink resource blocks,

Is the number of subcarriers in the resource block,

Is the number of a first control channel element (CCE) used for transmission of a physical downlink control channel (PDCCH) for transmitting control information corresponding to a PDSCH in each first downlink subframe,

Is the number of resources allocated for control information other than PDSCH A / N. 3. The method of claim 2,
Resource to which A / N of PDSCH received in the second downlink subframe is allocated

) Is determined by Equation 2 below.
[Formula 2]

In Equation 2, P is the number of the second downlink subframe, i is the index (0≤i≤P-1) of each second downlink subframe,

Is the number of resources to which an A / N of the PDSCH received in the first downlink subframe can be allocated. The method of claim 1,
Determining a resource to which an A / N of a PDSCH received in the first downlink subframe is allocated and receiving in the second downlink subframe when the TDD configuration configured in the primary cell is different from the reference TDD configuration; And determining a resource to which the A / N of the PDSCH is allocated is performed. A receiver configured to receive a Physical Downlink Shared Channel (PDSCH);
For a specific uplink subframe, the TDD configuration of the first associated downlink subframe, the primary cell, and the secondary cell determined based on the time division duplex (TDD) configuration set in the primary cell. Search for a first downlink subframe that is the same downlink subframe by comparing a second associated downlink subframe determined based on the selected reference TDD configuration based on the A / D of the PDSCH received in the first downlink subframe; An N (Ack / Nack) determines a resource allocated to the specific uplink subframe based on a TDD configuration configured in the primary cell and does not belong to the first downlink subframe among the second associated downlink subframes. The A / N of the PDSCH received in the second downlink subframe does not allocate resources allocated to the specific uplink subframe. A controller for determining a PDSCH A / N received in a subframe outside an area to which an PDSCH is allocated; And
And a transmitter for mapping and transmitting PDSCH A / N to resources determined by the controller in an uplink subframe determined based on the reference TDD configuration. The method of claim 5, wherein
Resource to which A / N of PDSCH received in the first downlink subframe is allocated

) Is a terminal, characterized by the following equation 1.
[Formula 1]

In Equation 1, M is the number of the first downlink subframe, i is the index (0≤i≤M-1) of each first downlink subframe,

ego

Satisfies

Is the number of downlink resource blocks,

Is the number of subcarriers in the resource block,

Is the number of a first control channel element (CCE) used for transmission of a physical downlink control channel (PDCCH) for transmitting control information corresponding to a PDSCH in each first downlink subframe,

Is the number of resources allocated for control information other than PDSCH A / N. The method according to claim 6,
Resource to which A / N of PDSCH received in the second downlink subframe is allocated

) Is a terminal, characterized by the following equation 2.
[Formula 2]

In Equation 2, P is the number of the second downlink subframe, i is the index (0≤i≤P-1) of each second downlink subframe,

Is the number of resources to which an A / N of the PDSCH received in the first downlink subframe can be allocated. The method of claim 1,
If the TDD configuration set in the primary cell and the reference TDD configuration are different, the controller determines a resource to which an A / N of a PDSCH received in the same downlink subframe is allocated and the non-identical downlink subframe is allocated. And determining a resource to which an A / N of the PDSCH received in the frame is allocated. Receiving a physical downlink shared channel (PDSCH) A / N (Ack / Nack) on a specific uplink subframe on a specific component carrier;
Extracting PDSCH A / N of a first downlink subframe related to the specific uplink subframe determined based on a time division duplex (TDD) configuration of the specific component carrier; And
PDSCH A of a second downlink subframe not belonging to the first downlink subframe among downlink subframes related to the specific uplink subframe determined based on a reference TDD configuration of a terminal communicating using a plurality of CCs And / N extracting the PDSCH A / N reception method of the base station. The method of claim 9,
Resource to which PDSCH A / N of the first downlink subframe is allocated

) Is determined by Equation 1 below.
[Formula 1]

In Equation 1, M is the number of the first downlink subframe, i is the index (0≤i≤M-1) of each first downlink subframe,

ego Satisfies

Is the number of downlink resource blocks,

Is the number of subcarriers in the resource block,

Is the number of a first control channel element (CCE) used for transmission of a physical downlink control channel (PDCCH) for transmitting control information corresponding to a PDSCH in each first downlink subframe,

Is the number of resources allocated for control information other than PDSCH A / N. The method of claim 9,
Resource to which PDSCH A / N of the second downlink subframe is allocated

) Is a PDSCH A / N reception method according to Equation 2 below.
[Formula 2]

In Equation 2, P is the number of the second downlink subframe, i is the index (0≤i≤P-1) of each second downlink subframe,

Is the number of resources to which an A / N of the PDSCH received in the first downlink subframe can be allocated. A receiver configured to receive a physical downlink shared channel (PDSCH) A / N (Ack / Nack) on a specific uplink subframe on a specific component carrier; And
A terminal of a terminal communicating with a plurality of component carriers by extracting PDSCH A / N of a first downlink subframe related to the specific uplink subframe determined based on a time division duplex (TDD) configuration of the specific component carrier And a controller for extracting PDSCH A / N of a second downlink subframe not belonging to the first downlink subframe among downlink subframes related to the specific uplink subframe determined based on a reference TDD configuration. Base station. 11. The method of claim 10,
Resource to which PDSCH A / N of the first downlink subframe is allocated

) Is determined by Equation 1 below.
[Formula 1]

In Equation 1, M is the number of the first downlink subframe, i is the index (0≤i≤M-1) of each first downlink subframe,

ego

Satisfies

Is the number of downlink resource blocks,

Is the number of subcarriers in the resource block,

Is the number of a first control channel element (CCE) used for transmission of a physical downlink control channel (PDCCH) for transmitting control information corresponding to a PDSCH in each first downlink subframe,

Is the number of resources allocated for control information other than PDSCH A / N. 13. The method of claim 12,
Resource to which PDSCH A / N of the second downlink subframe is allocated

) Is determined by Equation 2 below.
[Formula 2]

In Equation 2, P is the number of the second downlink subframe, i is the index (0≤i≤P-1) of each second downlink subframe,

Is the number of resources to which an A / N of the PDSCH received in the first downlink subframe can be allocated.

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