WO2013162185A1

WO2013162185A1 - Method for setting terminals and uplink control channel transmission resources for terminals

Info

Publication number: WO2013162185A1
Application number: PCT/KR2013/002720
Authority: WO
Inventors: 박동현
Original assignee: 주식회사 팬택
Priority date: 2012-04-27
Filing date: 2013-04-02
Publication date: 2013-10-31
Also published as: KR20130121605A

Abstract

The present invention relates to a wireless communication system and, in particular, to a technology for communicating through the use of a plurality of component carriers including a Primary Cell (PCell) and a Secondary Cell (SCell), and setting the transmission resources of an uplink control channel to transmit a Hybrid Automatic Repeat Request (HARQ) for a downlink data channel of a terminal in a system having different Time Division Duplex (TDD) settings for the plurality of component carriers.

Description

UE and UL Control Channel Transmission Resource Setting Method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system, and communicates using a plurality of CCs including a primary cell (PCell) and a secondary cell (SCell), and has different time division duplex (TDD) settings for the plurality of CCs. In a system, the present invention relates to a technique for setting a transmission resource of an uplink control channel for transmitting a hybrid automatic repeat request (HARQ) Ack / Nack for a downlink data channel of a terminal.

As communication systems have evolved, consumers, such as businesses and individuals, have used a wide variety of wireless terminals. Mobile communication systems such as LTE (Long Term Evolution) and LTE-A (LTE Advanced) of the current 3GPP series are high-speed and large-capacity communication systems that can transmit and receive various data such as video and wireless data, beyond voice-oriented services. Therefore, there is a demand for developing a technology capable of transmitting a large amount of data corresponding to a wired communication network. As one method for transmitting a large amount of data, a method of efficiently transmitting data through a plurality of CCs may be used.

Meanwhile, in a time division duplex (TDD) system, data may be transmitted and received by dividing transmission (Tx) and reception (Reception, Rx) into time slots using specific frequency bands. 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.

Meanwhile, in a multicarrier aggregation (carrier aggregation, or carrier combining, "CA") environment in which one or multiple component carriers (CCs) are combined, when the TDD setting of each CC is different, data is received at any timing. Consideration should be given as to whether to send the response information for, and also in what timing the response information should be allocated. The resource to which response information is allocated in the terminal using the CA technology so that a collision does not occur between the terminal using the CA technology and the terminal using the CA technology without changing the technology for the terminal not using the existing CA. Should be set.

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.

An embodiment of the present invention is to communicate using a plurality of component carriers including a primary cell (PCell) and a secondary cell (SCell), and in a system having different time division duplex (TDD) settings for the plurality of component carriers. A method of configuring a transmission resource of an uplink control channel for transmitting a hybrid automatic repeat request (HARQ) Ack / Nack for a downlink data channel of a terminal, the uplink to transmit the HARQ Ack / Nack for the downlink data channel of the PCell Determining a transmission resource of a link control channel based on a resource index of a downlink control channel for transmitting control information for a downlink data channel of the PCell; And a transmission resource of an uplink control channel for transmitting HARQ Ack / Nack for a downlink data channel of the SCell based on a value of a transmission power control field or a value of a carrier indication field among control information of a downlink data channel of the SCell. It provides a method for setting uplink control channel transmission resources of a terminal comprising the step of determining.

Another embodiment of the present invention is to communicate using a plurality of component carriers including a primary cell (PCell) and a secondary cell (SCell), and in a system having different time division duplex (TDD) settings for the plurality of component carriers. Resource index of a downlink control channel for transmitting a transmission resource of an uplink control channel for transmitting a hybrid automatic repeat request (HARQ) Ack / Nack for the downlink data channel of the PCell and control information for a downlink data channel of the PCell The transmission resource of the uplink control channel for transmitting the HARQ Ack / Nack for the downlink data channel of the SCell and the control resource for the downlink data channel of the SCell or the carrier indication field It provides a terminal comprising a data channel HARQ transmission resource setting unit to determine based on the value of.

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

1 illustrates a wireless communication system to which embodiments of the present invention can be applied.

2 illustrates a case where case A, case B, and case C are applied according to the TDD setting of the PCell and the TDD setting of the SCell.

3 shows an example in which serving cells in which PCell is set to TDD configuration 0 and SCell is set to TDD configuration 1 are used for communication.

4 illustrates an example in which configuration information for a PDSCH of an SCell is transmitted through a PDCCH of a PCell in the example of FIG. 3.

5 is a flowchart illustrating a PUCCH A / N resource allocation method according to an embodiment.

6 is a flowchart illustrating a PUCCH A / N resource allocation method according to another embodiment.

7 is a flowchart illustrating a PUCCH A / N resource allocation method according to another embodiment.

8 is a flowchart illustrating a PUCCH A / N resource allocation method according to another 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 the accompanying 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 addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

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 (BS) 20 performing uplink and downlink communication with the user equipment 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.

A base station 20 or a cell generally refers to a station that communicates with the user terminal 10, and includes a Node-B, an evolved Node-B, an Sector, and a Site. Other terms may be referred to as a site, a base transceiver system (BTS), an access point, a relay node, and the like.

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.

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.

The uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.

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 Table 1, a region denoted by D is a downlink subframe and a region denoted by U is an uplink subframe in a radio frame including 10 subframes. 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 the PDSCH, is transmitted from the terminal 10 to the base station 20 through the PUCCH in the uplink subframe. Hereinafter, the A / N for the PDSCH transmitted on the PUCCH is called A / N or the PUCCH A / N for the PDSCH. 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 PUCCH HARQ Ack / Nack of downlink subframes are transmitted in each uplink subframe (Subframe n) of each TDD UL-DL configuration. That is, A / N for the PDSCH transmitted in the downlink subframe (nk _m ) (k _m, K, m = 0,1..., M-1) in the uplink subframe n is transmitted. For example, assume that the TDD UL-DL configuration is "1". When the subframe number is 2, K = {7,6}, and the A / N for the PDSCH transmitted in the downlink subframe with the

subframe numbers

5 and 6 is transmitted through this subframe. When the subframe number is 3, K = {4} and A / N for the PDSCH transmitted in the downlink subframe having the subframe number of 9 is transmitted through this subframe. When the subframe number is 7, K = {7,6} and A / N for the PDSCH transmitted in the downlink subframe with the

subframe numbers

0 and 1 are transmitted through the subframe. When the subframe number is 8, K = {4} and A / N for the PDSCH transmitted in the downlink subframe having the subframe number 4 is transmitted through the subframe.

For the A / N for the PDSCH transmitted in the downlink subframe nk _i (k _i ∈K), the PUCCH resource may be determined implicitly as shown in Equation 1 below.

[Equation 1]

In Equation 1,

Is a PUCCH resource to which A / N for 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 the

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

As an example, the system bandwidth is 10 MHz (50 Physical Resource Block (PRB)),

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

If M = 1, the PUCCH resource according to the value of c (

) Is shown in Table 3 below.

TABLE 3

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.

If M = 2, the PUCCH resource according to the value of c (

) Is shown in Table 4 below.

Table 4

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.

If M = 3, the PUCCH resource according to the value of c (

) Is shown in Table 5 below.

Table 5

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.

If M = 4, the PUCCH resource according to the value of c (

) Is shown in Table 6 below.

Table 6

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.

Meanwhile, a multicarrier aggregation (CA) technique that combines one or more component carriers (CC) may be used. The plurality of CCs may include one primary cell (PCell) and one or more secondary cells (SCell).

A terminal communicating with a base station in a CA environment may perform communication through a plurality of aggregated CCs having different TDD settings. In this case, the PUCCH A / N may be delivered only through the PCell.

The PUCCH HARQ Ack / Nack timing in the PCell may follow the TDD configuration of the PCell (see Table 2).

Meanwhile, the PUCCH HARQ Ack / Nack timing in the SCell may be one of the following three cases.

Case A: When downlink subframes of the PCell are a superset of downlink subframes of the SCell, the PUCCH HARQ Ack / Nack timing of the SCell may follow the TDD configuration of the PCell. In other words, when the uplink subframes of the PCell are a subset of the uplink subframes of the SCell, the PUCCH HARQ Ack / Nack timing of the SCell may follow the TDD configuration of the PCell.

Case B: When the set of downlink subframes of the PCell is a subset of the set of downlink subframes of the SCell, the PUCCH HARQ Ack / Nack timing of the SCell may follow the TDD configuration of the SCell. In other words, when the uplink subframes of the PCell are an expanded set of uplink subframes of the SCell, the PUCCH HARQ Ack / Nack timing of the SCell may follow the TDD configuration of the SCell.

Case C: When the set of downlink subframes of the PCell is not a subset or an expanded set of the set of downlink subframes of the SCell, the PUCCH HARQ Ack / Nack timing of the SCell is set to a TDD other than the TDD setting of the PCell or SCell. You can follow For example, the PUCCH HARQ Ack / Nack timing of the SCell may follow a TDD configuration in which subframes including both downlink subframes of the PCell and downlink subframes of the SCell are configured as downlink subframes. In other words, the PUCCH HARQ Ack / Nack timing of the SCell may follow a TDD configuration in which a common subframe among the uplink subframes of the PCell and the uplink subframe of the SCell is configured as an uplink subframe.

Considering the above three cases, when the TDD settings of the PCell and the SCell are different from each other, the PUCCH HARQ Ack / Nack timing of the SCell may be as shown in FIG. 2. 2 illustrates a case where case A, case B, and case C are applied according to the TDD setting of the PCell and the TDD setting of the SCell, and the TDD setting applied to the case C is displayed.

In a CA environment using a plurality of CCs having different TDD settings, a resource for PUCCH A / N may collide.

FIG. 3 illustrates, as an example, a case in which serving cells in which PCell is set to TDD configuration 0 and SCell is set to TDD configuration 1 are used for communication.

In this case, the PCell may determine the PUCCH HARQ Ack / Nack timing according to the TDD configuration 0. That is, referring to Table 2, A / N for PDSCH in downlink subframe 6 of PCell is transmitted in uplink subframe 2 and PDSCH in downlink subframe 0 of PCell in uplink subframe 4. A / N is transmitted, A / N for PDSCH in downlink subframe 1 of PCell is transmitted in uplink subframe 7, and PDSCH in downlink subframe 5 of PCell in uplink subframe 9 A / N for is transmitted.

Since downlink subframes (

subframes

0, 1, 5, and 6) of the PCell are a subset of downlink subframes (

subframes

0, 1, 4, 5, 6, and 9) of the SCell, the case B described above. In this case, the SCell may determine the PUCCH HARQ Ack / Nack timing according to TDD configuration 1. That is, referring to Table 2, A / N for PDSCH in

downlink subframes

5 and 6 of the SCell is transmitted in uplink subframe 2, and in downlink subframe 9 of the SCell in uplink subframe 3 A / N for PDSCH is transmitted, A / N for PDSCH in

downlink subframes

0 and 1 of SCell is transmitted in uplink subframe 7, and downlink subframe for SCell in uplink subframe 8 A / N for PDSCH at 4 is transmitted.

In such a situation, when a channel using CA technology is configured with channel selection by cross-carrier scheduling and A / N transmission method, an existing UE (eg, 3GPP) operating in a PCell is used. The PUCCH resource allocated for the PCell of the terminal using CA technology as well as the terminal according to Rel-8 / 9/10 may collide with the PUCCH resource allocated for the SCell of the terminal using CA technology.

For example, in the example of FIG. 3, in the uplink subframe 7 of the PCell, the A / N for the PDSCH in the downlink subframe (subframe 1) of one PCell is transmitted (M = 1), PUCCH resources are determined by 1 as shown in Table 3.

Meanwhile, in uplink subframe 7 of the PCell, A / N for PDSCH in downlink subframes (subframes 0 and 1) of two SCells is transmitted (M = 2). Likewise, the PUCCH resource is determined.

In the case of cross-carrier scheduling, control information transmitted through a control channel (eg, PDCCH) of one CC may include configuration of a data channel (eg, PDSCH) of another CC.

Referring to FIG. 4, configuration information of PDSCH (PDSCH1) of subframe 0 of SCell may be transmitted through PDCCH (PDCCH1) of subframe 0 of PCell. In addition, configuration information for PDSCH (PDSCH2) in subframe 1 of SCell may be transmitted through PDCCH (PDCCH2) in subframe 1 of PCell. And, configuration information for PDSCH (PDSCH3) in subframe 0 of PCell may be transmitted through PDCCH (PDCCH3) in subframe 0 of PCell.

As described above, A / N for PDSCH (PDSCH1) of subframe 0 of SCell, A / N for PDSCH (PDSCH2) of subframe 1 of SCell, and PDSCH (PDSCH3) of subframe 1 of PCell. Both A / Ns are transmitted in uplink subframe 7 of the PCell.

Comparing Table 3 and Table 4 derived from Equation 1, even if n _CCE is set differently, the same PUCCH resource (

) May be assigned and collide with each other.

For example, when M = 1, the downlink subframe index is n-6 and n _CCE = 11, the PUCCH resource (

) Is determined to be 11, M = 2, the downlink subframe index is n-7, n _CCE = 0, and PUCCH resources (

) Is determined to be 11, and we can see that these resources conflict with each other. That is, a case may occur where an A / N transmission resource for the PDSCH (PDSCH3) of the PCell and the A / N transmission resource for the PDSCH (PDSCH1) of the subframe 0 of the SCell collide with each other.

For another example, when M = 1, the downlink subframe index is n-6 and n _CCE = 27, the PUCCH resource (

) Is determined to be 27, and when M = 2, the downlink subframe index is n-6 and n _CCE = 16, the PUCCH resource (

) Is determined to be 27, and we can see that these resources conflict with each other. That is, a case may occur in which an A / N transmission resource for PDSCH (PDSCH3) of subframe 1 of the PCell collides with an A / N transmission resource for PDSCH (PDSCH2) of subframe 1 of SCell.

As described above, when different TDD settings are applied to a plurality of CCs in a CA environment and cross-carrier scheduling is applied, the A / N transmission resource for the PDSCH located in the SCell is also the first of the PDCCH located in the PCell. Can be derived from the CCE index. In such a case, a collision may occur as described above.

Therefore, in embodiments of the present invention, the PUCCH A / N resource for the SCell may be derived in an implicit manner rather than implicitly from the first CCE index of the PDCCH according to equation (1).

Referring to FIG. 5, the base station delivers an A / N resource indicator (ARI) resource mapping table to the terminal through higher layer signaling (eg, RRC (Radio Resource Control) signaling) (S510). The ARI resource mapping table includes a 2-bit value of the ARI delivered using the transmit power control (TPC) field in the downlink control information (DCI) transmitted through the PDCCH, and a corresponding explicitly allocated resource set. can do. Where the resource set is a PUCCH resource (

) May be included.

For example, when the resource set delivered by higher layer signaling is {n1}, {n2}, {n3}, and {n4}, the ARI resource mapping table may be as shown in Table 7 below.

TABLE 7

Table 7 shows that a value of one ARI indicates a resource set composed of one PUCCH A / N resource, but one resource set may be configured of a plurality of PUCCH A / N resources. For example, if the SCell is a 2 TB transmission mode as a multi-input multi-output (MIMO), two PUCCHs to transmit HARQ-ACK / NACKs for a PDSCH transmission consisting of two TBs on the SCell. A / N transmission resources may be needed. In this case, each transmission resource set may include two PDSCH transmission resources.

Referring back to FIG. 5, the base station transmits a PDCCH having DCI information through cross-carrier scheduling for PDSCH transmission on the SCell (S520). DCI includes a 2-bit TPC field that can be used as an ARI.

The ARI may be delivered using the TPC field in the DCI. Since a plurality of data channels may be located on a plurality of carriers in a CA environment, a plurality of DCIs for transmitting control information of each data channel may be delivered. The TPC field for transmission power control of the terminal may be located in each DCI. The TPC field in one DCI may be used to control the transmission power of the UE, and the TPC field in the other DCI may be used as an ARI for configuring PUCCH A / N transmission resources. For example, the TPC field of the DCI for the PDSCH of the PCell transmitted through the downlink subframe of the PCell is used for transmission power control of the UE and the DCI of the PDSCH of the SCell transmitted through the downlink subframe of the PCell. The TPC field may be used as an ARI for configuring A / N transmission resource for PDSCH of SCell.

The terminal determines the PUCCH A / N transmission resource of the SCell using the ARI value transmitted through the TPC field in the DCI (S540). The terminal determines the PUCCH A / N transmission resource corresponding to the 2-bit ARI value using the ARI resource matching table transmitted through higher layer signaling. In this case, the PUCCH A / N transmission resource for the PDSCH transmission of the PCell may be determined using the first CCE index of the PDCCH according to Equation 1 described above.

Alternatively, the above-described step S540 may be executed when the UE determines that the PUCCH A / N transmission resources according to Equation 1 collide in an uplink subframe. That is, the UE determines whether or not the PUCCH A / N transmission resource according to Equation 1 collides in an uplink subframe (S530). If it is determined that the PUCCH A / N transmission resources collide (YES in S530), the UE determines the PUCCH A / N transmission resources for the PDSCH of the SCell by using a 2-bit ARI value in the DCI (S540). If it is determined that the PUCCH A / N transmission resources do not collide (NO in S530), the UE determines the PUCCH A / N transmission resources using the first CCE index of the PDCCH of the SCell according to Equation 1 described above ( S550).

The terminal transmits the PUCCH A / N using the determined PUCCH A / N transmission resource (S560).

Although the 2-bit ARI is illustrated in the above-described example, this is only an example and it is also possible to use ARIs of different sizes.

6 is a flowchart illustrating a PUCCH A / N resource allocation method for HARQ-ACK / NACK transmission for PDSCH transmission on a SCell according to another embodiment.

Referring to FIG. 6, the base station transmits a carrier indicator field (CIF) mapping table to the terminal through higher layer signaling (eg, RRC signaling) (S610). The CIF mapping table may include a 3-bit value delivered using a CIF in the DCI transmitted through the PDCCH and a resource set corresponding thereto. Where the resource set is one or more PUCCH resources (

) May be included.

One bit of the 3-bit CIF field may be used to refer to one of two CCs for original purposes. The remaining 2 bits may be used to explicitly refer to the PUCCH A / N transmission resource for PDSCH transmission on the SCell. Thus, the CIF mapping table may be as shown in Table 8 below.

Table 8

Referring back to FIG. 6, the base station transmits a DCI for cross-carrier scheduling through the PDCCH (S620).

DCI includes a 3-bit CIF composed of 1 bit for indicating a serving cell and 2 bits for indicating an explicit PUCCH A / N transmission resource. For example, when the 3-bit CIF is '100', the value of '1' of the first 1 bit indicates that the PDSCH is transmitted by the SCell, and the value of '00' of the remaining 2 bits is A / for the PDSCH of the SCell. N indicates that the transmission resource is determined by the first resource set.

Two bits for indicating the A / N resource in the CIF may be used as an indicator for the PUCCH format 1 / 1a / 1b resource for PDSCH transmission transmitted through the SCell. Therefore, two bits for indicating A / N resource of CIF in PDCCH for PDSCH transmission of PCell and two bits for indicating A / N resource of CIF in PDCCH for PDSCH transmission of SCell may be the same value. For example, when the CIF in the PDCCH for PDSCH transmission of the SCell is '100' in which '1' for indicating the SCell and '00' for indicating the A / N transmission resource for the PDSCH of the SCell are combined, In the PDCCH for PDSCH transmission, the CIF may be '000' in which '0' for indicating the PCell and '00' for indicating the A / N transmission resource for the PDSCH of the SCell are combined.

The terminal determines the PUCCH A / N transmission resource of the SCell using the value transmitted through the CIF in the DCI (S640). The terminal determines a PUCCH A / N transmission resource corresponding to a value of 2 bits in the CIF using the CIF mapping table transmitted through higher layer signaling. In this case, the PUCCH A / N transmission resource of the PCell may be determined using the first CCE index of the PDCCH according to Equation 1 described above.

Alternatively, the above-described step S640 may be executed when the UE determines that the PUCCH A / N transmission resource according to Equation 1 collides in an uplink subframe. That is, the terminal determines whether or not the PUCCH A / N transmission resource according to Equation 1 collides in an uplink subframe (S630). If it is determined that the PUCCH A / N transmission resources collide (YES in S630), the UE determines the PUCCH A / N transmission resources for the PDSCH of the SCell using a value of 2 bits in the CIF (S640). If it is determined that the PUCCH A / N transmission resources do not collide (NO in S630), the UE determines the PUCCH A / N transmission resources by using the first CCE index of the PDCCH of the SCell according to Equation 1 described above ( S650).

Then, the terminal transmits the HARQ A / N for the PDSCH using the determined PUCCH A / N transmission resources (S660).

In the above example, although two bits of the 3-bit CIF are illustrated to be used to indicate the PUCCH A / N transmission resource, this is only an example and other sizes of information may be used.

Referring to FIG. 7, the base station transmits a resource set for PUCCH format 3 to the terminal through higher layer signaling (S710).

When the UE transmits the PUCCH A / N in the uplink, the UE determines whether a PUCCH A / N transmission resource according to Equation 1 collides in an uplink subframe (S720).

When it is determined that the PUCCH A / N transmission resources collide with each other (YES in S720), even if the UE is configured for channel selection in the corresponding uplink subframe, the format of the PUCCH for transmitting PUCCH A / N is changed to PUCCH format 3 The resource of the switched PUCCH format 3 is determined using the information received through higher layer signaling (S730).

On the other hand, if it is determined that the PUCCH A / N transmission resources do not collide (NO in S720), the UE determines the PUCCH A / N transmission resources using the first CCE index of the PDCCH according to Equation 1 described above ( S740). In this case, the PUCCH transmission format may be 1 / 1a / 1b.

The terminal transmits HARQ A / N for PDSCH transmission using the determined PUCCH A / N transmission resource (S750).

8 is a flowchart illustrating a HARQ A / N resource allocation method for a PDSCH according to another embodiment.

Referring to FIG. 8, in order to maintain channel selection transmission on an uplink subframe, the base station transmits information on a PUCCH format 1 / 1a / 1b resource to a terminal through higher layer signaling (S810).

When the UE determines the A / N transmission resource for the PDSCH transmission of the SCell, the UE determines the PUCCH A / N transmission resource by using the resource information received in step S810 (S820). That is, the UE does not determine the A / N transmission resource for the PDSCH using the resources of the PDCCH for transmitting the control information for the PDSCH, but the PUCCH A / N transmission resource by the information explicitly provided through higher layer signaling. Determine.

The terminal transmits the PUCCH A / N using the determined PUCCH A / N transmission resource (S830).

Referring to FIG. 9, the terminal 900 determines whether the PUCCH A / N transmission resource setting unit 910 for setting the PUCCH A / N transmission resources and the PUCCH A / N transmission resources collide with each other. The transmission resource collision determination unit 920, and a transmission unit 930 for transmitting the PUCCH A / N through the set transmission resources.

The PUCCH A / N transmission resource setting unit 910 may set the PUCCH A / N transmission resource based on the first index of the PDCCH according to Equation (1).

The PUCCHH A / N transmission resource collision determination unit 920 determines that the PUCCH A / N transmission resource in the PCell determined by Equation 1 and the PUCCH A / N transmission resource in the SCell determined by Equation 1 are uplink subframes. It is possible to determine whether they collide with each other.

When the PUCCH A / N transmission resource collision determination unit 920 determines that the PUCCH A / N transmission resource in the PCell and the PUCCH A / N transmission resource in the SCell collide with each other in an uplink subframe, the PUCCH A / N The transmission resource setting unit 910 may reset the PUCCH A / N transmission resource of the SCell in another manner.

For example, the PUCCH A / N transmission resource setting unit 910 may set the PUCCH A / N transmission resource by using the TPC field in the DCI as an ARI that designates the PUCCH A / N transmission resource of the SCell. Information on the PUCCH A / N transmission resource corresponding to the value of the ARI may be provided in advance through higher layer signaling.

Alternatively, the PUCCH A / N transmission resource setting unit 910 may set a PUCCH A / N transmission resource of the SCell using a part (for example, 2 bits) of CIF (3 bits) in the DCI. Information on the PUCCH A / N transmission resource corresponding to the value of the CIF may be provided in advance through higher layer signaling.

Alternatively, the resource PUCCH A / N transmission resource setting unit 910 may perform the PUCCH A / N transmission using the PUCCH format 3 and may set the transmission resource of the PUCCH format 3. Information on the transmission resource of the PUCCH format 3 may be provided in advance through higher layer signaling.

In the above-described example, the PUCCH A / N transmission resource setting unit 910 determines that the PUCCH A / N transmission resource collision resource determination unit 920 determines whether the resource collides with the PUCCH A / N transmission resource of the SCell. It is described as resetting. However, the PUCCH A / N transmission resource collision determination unit 920 is omitted, and the PUCCH A / N transmission resource setting unit 910 may set the PUCCH A / N transmission resources regardless of resource collision. For example, the PUCCH A / N transmission resource setting unit 910 sets the transmission resource of the PUCCH A / N of the PCell according to Equation 1, and the transmission resource of the PUCCH A / N of the SCell is the value of the above-described ARI, It is also possible to set based on the value of the CIF, resource allocation information of PUCCH format 3, or resource allocation information delivered through higher layer signaling.

The transmitter 930 transmits the PUCCH A / N through an uplink subframe through the resources set by the PUCCH A / N transmission resource setting unit 910.

Referring to FIG. 10, the base station 1000 sets a mapping table including mapping information on PUCCH A / N transmission resources of a SCell in advance and transmits the preset information transmitting unit 1010 to transmit to a terminal through higher layer signaling. And a resource information transmitter 1020 for transmitting information for designating the PUCCH A / N transmission resource of the SCell to the terminal through the PDCCH using a mapping table.

In one example, the table transmitted to the terminal through the preset information transmitter 1010 may include an ARI using a TPC field in the DCI and a PDSCH transmission resource corresponding to the ARI. The resource information transmitter 1020 may transmit a value for designating one set of PDSCH transmission resources in the table through the TPC field of the DCI for the PDSCH of the SCell.

In another example, the table transmitted to the terminal through the preset information transmitter 1010 may include a collection of serving cell information and PDSCH transmission resources corresponding to CFI and CFI in the DCI. The resource information transmitter 1020 may transmit a value that designates one set of PDSCH transmission resources in the table through the CFI of the DCI for the PDSCH of the SCell.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited thereto. 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.

CROSS-REFERENCE TO RELATED APPLICATIONCROSS-REFERENCE TO RELATED APPLICATION

This patent application claims priority under Patent Application No. 10-2012-0044969, filed in Korea, on April 27, 2012, pursuant to Article 119 (a) (35 USC § 119 (a)). All content is incorporated by reference in this patent application. In addition, if this patent application claims priority for the same reason for countries other than the United States, all its contents are incorporated into this patent application by reference.

Claims

In a system that communicates using a plurality of CCs including a PCell (Primary Cell) and a SCell (Secondary Cell), and has a different time division duplex (TDD) configuration for the plurality of CCs, the UE performs downlink data channel A method of configuring a transmission resource of an uplink control channel for transmitting a hybrid automatic repeat request (HARQ) Ack / Nack,

Determining a transmission resource of an uplink control channel for transmitting HARQ Ack / Nack for the downlink data channel of the PCell based on a resource index of a downlink control channel for transmitting control information for the downlink data channel of the PCell; And

The transmission resource of the uplink control channel for transmitting the HARQ Ack / Nack for the downlink data channel of the SCell is determined based on the value of the transmission power control field or the carrier indication field among control information of the downlink data channel of the SCell. The uplink control channel transmission resource setting method of a terminal, characterized in that it comprises a step of.
The method of claim 1,

The carrier indication field includes a field indicating a component carrier on which a downlink data channel is transmitted and a field indicating a transmission resource of the uplink control channel.
The method of claim 2,

A field indicating a transmission resource of the uplink control channel in the carrier indication field of the control information for the downlink data channel of the PCell and the uplink control channel in the carrier indication field of the control information for the downlink data channel of the SCell Fields indicating the transmission resources of the uplink control channel transmission resource configuration method of the terminal, characterized in that the same value.
The method of claim 2,

The field indicating the CC is 1 bit, and the field indicating the transmission resource of the uplink control channel is a 2-bit uplink control channel transmission resource setting method of the terminal.
The method of claim 1,

And receiving information indicating a transmission resource of an uplink control channel corresponding to the value of the transmission power control field or the carrier indication field from a base station. How to set up.
The method of claim 1,

Determining transmission resources of an uplink control channel for transmitting HARQ Ack / Nack for the downlink data channel of the SCell based on a resource index of a downlink control channel for transmitting control information for the downlink data channel of the SCell; And

Determining whether transmission resources of an uplink control channel for transmitting HARQ Ack / Nack for downlink data channels of the PCell and the SCell collide with each other;

Determining a transmission resource of an uplink control channel to transmit HARQ Ack / Nack for the downlink data channel of the SCell based on a value of a transmission power control field or a value of a carrier indication field, the downlink of the PCell and SCell The uplink control channel transmission resource setting method of a terminal, characterized in that executed when the transmission resources of the uplink control channel for transmitting the HARQ Ack / ack for the link data channel collide with each other.
In a system that communicates using a plurality of CCs including a PCell (Primary Cell) and a SCell (Secondary Cell), and has different time division duplex (TDD) settings for the plurality of CCs,

A transmission resource of an uplink control channel for transmitting a hybrid automatic repeat request (HARQ) Ack / Nack for the downlink data channel of the PCell to a resource index of a downlink control channel for transmitting control information for the downlink data channel of the PCell. The transmission resource of the uplink control channel for determining HARQ Ack / Nack for the downlink data channel of the SCell and the value of the transmit power control field or the carrier indication field of the control information for the downlink data channel of the SCell. And a data channel HARQ transmission resource setting unit to determine based on the value.
The method of claim 7, wherein

The carrier indication field includes a field indicating a component carrier on which a downlink data channel is transmitted and a field indicating a transmission resource of the uplink control channel.
The method of claim 8,

A field indicating a transmission resource of the uplink control channel in the carrier indication field of the control information for the downlink data channel of the PCell and the uplink control channel in the carrier indication field of the control information for the downlink data channel of the SCell Fields indicating the transmission resources of the terminal characterized in that they have the same value.
The method of claim 8,

The field indicating the CC is 1 bit, and the field indicating the transmission resource of the uplink control channel is a terminal, characterized in that 2 bits.
The method of claim 7, wherein

Transmission resources of an uplink control channel for transmitting HARQ Ack / Nack for a downlink data channel of the SCell are transmitted from an uplink control channel corresponding to a value of the transmission power control field or a value of the carrier indication field received from a base station. Terminal determined by using a table indicating the resource.
The method of claim 7, wherein

A transmission resource of an uplink control channel for transmitting HARQ Ack / Nack for a downlink data channel of the PCell determined based on a resource index of a downlink control channel for transmitting control information for the downlink data channel of the PCell, and Whether transmission resources of an uplink control channel for transmitting HARQ Ack / Nack for the downlink data channel of the SCell determined based on the resource index of the downlink control channel that carries control information on the downlink data channel of the SCell collide with each other Further comprising a data channel HARQ transmission resource collision determination unit for determining whether or not,

If it is determined that the transmission resources of the uplink control channel for transmitting the HARQ Ack / Nack for the downlink data channels of the PCell and the SCell collide with each other, the HARQ transmission resource setting unit HARQ Ack for the downlink data channel of the SCell And a transmission resource of an uplink control channel for transmitting / Nack is determined based on a value of a transmission power control field or a carrier indication field of control information of a downlink data channel of the SCell.