KR20200056964A - Method and apparatus of controlling uplink scheduling and harq timing - Google Patents

Abstract

A UL HARQ support method comprises the steps of: transmitting, by a base station, information for cross-carrier scheduling between a TDD-based first serving cell and an FDD-based second serving cell to a terminal; transmitting, by the base station, a UL grant to a first subframe through the first serving cell; receiving, by the base station, a physical uplink shared channel (PUSCH) in a second subframe through the second serving cell from the terminal; and transmitting, by the base station, a physical HARQ indicator channel (PHICH) to a third subframe through the first serving cell. The second subframe is transmitted to a subframe n+4 when the first subframe is a subframe n. The second subframe is transmitted to a subframe i-6 when the third subframe is a subframe i. The first serving cell is a scheduling cell, and the second serving cell is a scheduled cell.

Description

Method and apparatus for uplink scheduling and HARQ timing control {METHOD AND APPARATUS OF CONTROLLING UPLINK SCHEDULING AND HARQ TIMING}

The present invention relates to wireless communication, and more particularly, to a method and apparatus for controlling uplink (UL) scheduling and hybrid automatic repeat reQuest (HARQ) timing support in a next generation LTE system.

Among technologies that increase the reliability of wireless communication, there is an automatic repeat request (ARQ). ARQ is when a receiver fails to receive a data signal, the transmitter retransmits the data signal. In addition, there is a hybrid automatic repeat request (HARQ) that combines Forward Error Correction (FEC) and ARQ. A receiver using HARQ basically attempts error correction on the received data signal, and determines whether to retransmit using an error detection code. CRC (Cyclic Redundancy Check) may be used as the error detection code. If an error of the data signal is not detected through the CRC detection process, the receiver determines that decoding of the data signal is successful. In this case, the receiver transmits an acknowledgment (ACK) signal to the transmitter. When an error of the data signal is detected through the CRC detection process, the receiver determines that decoding of the data signal has failed. In this case, the receiver sends a NACK (Not-Acknowledgement) signal to the transmitter. The transmitter may retransmit the data signal when the NACK signal is received.

Meanwhile, the wireless communication system may support Frequency Division Duplex (FDD) and Time Division Duplex (TDD). In the case of FDD, there are carriers used for uplink (UL) transmission and carrier frequencies used for downlink DL transmission, so that uplink transmission and downlink transmission can be performed simultaneously in a cell. . In the case of TDD, uplink transmission and downlink transmission are always classified temporally based on one cell. In the case of TDD, since the same carrier is used for uplink transmission and downlink transmission, the base station and the terminal repeat switching between the transmission mode and the reception mode. In the case of TDD, a special subframe may be provided to provide a guard time for mode switching between transmission and reception. The special subframe may include a downlink part (DwPTS), a protection period (GP), and an uplink part (UpPTS). In the case of TDD, the amount of resources allocated for uplink and downlink transmission may be asymmetrically provided through various uplink (UL) -downlink (DL) settings.

On the other hand, the frequency resource is saturated based on the present, and various technologies are being used in a wide range of frequency bands. For this reason, each of the bands scattered is designed to meet the basic requirements to operate an independent system as a method to secure a broadband bandwidth in order to meet a higher data rate demand, and a plurality of bands are integrated into one system. Carrier aggregation (CA), which is a concept tied to, is introduced. At this time, a band or a carrier capable of operating independently is defined as a component carrier (CC). With the advent of the carrier aggregation system, an ACK / NACK signal corresponding to a plurality of CCs must be transmitted.

Recently, a TDD-FDD CA technique for carrier aggregation (CA) of an FDD band or a carrier and a TDD band or a carrier has been considered. A new uplink scheduling and HARQ timing method is required to perform a TDD-FDD joint operation according to the TDD-FDD CA technique. Particularly, when cross-carrier scheduling between a TDD carrier and an FDD carrier is configured (configured) in a terminal, when applying an existing uplink scheduling / HARQ timing, multiple uplinks of cells scheduled from the scheduling cell There is a problem that resources may not be utilized. In order to solve the above problem when the TDD-FDD is set as described above, appropriate and efficient uplink of when a data signal is transmitted or received, and when a HARQ ACK / NACK signal for the data signal is transmitted or received. A method for setting scheduling and HARQ timing is required.

An object of the present invention is to provide an uplink scheduling method and apparatus.

The technical problem of the present invention is to provide an uplink HARQ timing control method and apparatus.

The technical problem of the present invention is to provide an uplink scheduling and HARQ method and apparatus for a terminal configured with TDD-FDD.

Another technical problem of the present invention is to provide an uplink scheduling and HARQ method and apparatus in a CA or a system supporting dual connectivity.

According to an aspect of the present invention, a UL HARQ supporting method comprises: transmitting, by a base station, information for cross-carrier scheduling between the TDD-based first serving cell and the FDD-based second serving cell to the terminal; Transmitting a UL grant to a first subframe through the first serving cell, receiving, by the base station, a PUSCH (Physicla Uplink Shared Channel) from the terminal in a second subframe through the second serving cell; and And a base station transmitting a PHICH (Physical HARQ Indicator Channel) to a third subframe through the first serving cell, if the first subframe is a subframe n, the second subframe is a subframe n +. When transmitted to 4, and the third subframe is subframe i, the second subframe is transmitted to subframe i-6, the first serving cell is a scheduling cell, and the second serving cell is It is a scheduled cell.

According to the present invention, when TDD-FDD carrier aggregation (or dual connectivity) is set in the terminal and cross-carrier scheduling is set, it is possible to efficiently control UL scheduling / HARQ timing, and multiple uplinks of scheduled cells By increasing the resource utilization rate, data transmission efficiency can be improved according to the purpose of performing carrier aggregation (or dual connection) in order to satisfy a high data rate requirement of the UE.

1 shows a wireless communication system to which the present invention is applied.
2 shows an example of a protocol structure for supporting a multi-carrier system to which the present invention is applied.
3 is an example of a radio frame structure to which the present invention is applied. This is an FDD radio frame structure and a TDD radio frame structure.
4 shows an example in which an FDD-TDD combining operation technique to which the present invention is applied is applied.
5 is an example of terminal capabilities for a TDD-FDD combining operation to which the present invention is applied.
FIG. 6 shows an example of limited UL scheduling on a scheduled cell when cross-carrier scheduling is configured in a terminal in which TDD-FDD CA is configured.
7 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 0.
8 shows an example of UL scheduling / HARQ timing according to a second embodiment for a case where the TDD UL / DL setting of the scheduling cell is 0.
9 shows an example of UL scheduling / HARQ timing according to a third embodiment for a case where the TDD UL / DL setting of the scheduling cell is 0.
10 shows an example of UL scheduling / HARQ timing according to a fourth embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 0.
11 shows an example of UL scheduling / HARQ timing according to a fifth embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 0.
12 shows an example of UL scheduling / HARQ timing according to a sixth embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 0.
13 shows an example of UL scheduling / HARQ timing according to a seventh embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 0.
14 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 1.
15 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 1.
16 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 2.
17 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 2.
18 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 3.
19 shows an example of UL scheduling / HARQ timing according to a second embodiment for a case where the TDD UL / DL setting of the scheduling cell is 3.
20 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 4.
21 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 4.
22 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 5.
23 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 5.
24 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 6.
25 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case where the TDD UL / DL setting of the scheduling cell is 6.
26 is a flowchart illustrating an example of a method for supporting UL HARQ by a UE when carrier aggregation of a TDD cell and an FDD cell is set in the UE and the TDD cell is cross-scheduled to the UE as a scheduling cell.
27 is a flowchart illustrating an example of a method for supporting UL HARQ by a base station when carrier aggregation of a TDD cell and an FDD cell is set in a terminal and a TDD cell is cross-scheduled to the terminal as a scheduling cell.
28 shows an example of UL scheduling / HARQ timing according to the first embodiment for the case where the scheduling cell is an FDD cell and the scheduled cell is a TDD cell.
29 shows an example of UL scheduling / HARQ timing according to a second embodiment for a case where the scheduling cell is an FDD cell and the scheduled cell is a TDD cell.
30 is a flowchart illustrating an example of a method of supporting HARQ according to the present invention when carrier aggregation of a TDD cell and an FDD cell is set in a terminal and an FDD cell is set as a scheduling cell.
31 is a flowchart illustrating an example of a method for supporting HARQ by a terminal when carrier aggregation of a TDD cell and an FDD cell is set in the terminal and the FDD cell is set as a scheduling cell.
32 is a block diagram illustrating a base station and a terminal performing UL scheduling / HARQ operation according to the present invention.

Hereinafter, some embodiments will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the embodiments of the present specification, when it is determined that detailed descriptions of related well-known configurations or functions may obscure the subject matter of the present specification, detailed descriptions thereof will be omitted.

In addition, in describing the components of the present specification, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to the other component, but another component between each component It should be understood that may be "connected", "coupled" or "connected".

In addition, this specification is described for a wireless communication network, the work performed in the wireless communication network is performed in the process of controlling the network and transmitting data in a system (for example, a base station) that is in charge of the wireless communication network, or the wireless The operation can be performed at the terminal coupled to the network.

According to one embodiment of the present invention, the meaning of transmitting a control channel may be interpreted as meaning that control information is transmitted through a specific channel. Here, the control channel may be, for example, a Physical Downlink Control Channel (PDCCH) or a Physical Uplink Control Channel (PUCCH).

1 shows a wireless communication system to which the present invention is applied.

Referring to FIG. 1, the wireless communication system 10 is widely deployed to provide various communication services such as voice and packet data. The wireless communication system 10 includes at least one base station (BS) 11. Each base station 11 provides communication services for specific cells 15a, 15b, and 15c. The cell can be further divided into a number of regions (called sectors).

The mobile station (MS) 12 may be fixed or mobile, and user equipment (UE), mobile terminal (MT), user terminal (UT), subscriber station (SS), wireless device (PDA), PDA (personal digital assistant), wireless modem (wireless modem), handheld device (handheld device) can be called in other terms. The base station 11 may be called other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, a femto base station, a home base station (B), and a relay. . Cells are meant to cover all of the various coverage areas, such as megacells, macrocells, microcells, picocells, and femtocells.

Hereinafter, downlink refers to communication from the base station 11 to the terminal 12, and uplink refers to communication from the terminal 12 to the base station 11. In the downlink, the transmitter may be part of the base station 11, and the receiver may be part of the terminal 12. In the uplink, the transmitter may be part of the terminal 12 and the receiver may be part of the base station 11. There are no restrictions on the multiple access technique applied to the wireless communication system. Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier-FDMA (SC-FDMA), OFDM-FDMA, OFDM-TDMA , OFDM-CDMA can use various multiple access techniques. For uplink transmission and downlink transmission, a time division duplex (TDD) method transmitted using different times may be used, or a frequency division duplex (FDD) method transmitted using different frequencies may be used.

Carrier aggregation (CA) supports a plurality of carriers and is also called spectrum aggregation or bandwidth aggregation. The individual unit carriers grouped by carrier aggregation are called component carriers (CCs). Each component carrier is defined by a bandwidth and a center frequency. Carrier aggregation is introduced to support increased throughput, prevent cost increase due to the introduction of broadband radio frequency (RF) devices, and ensure compatibility with existing systems. For example, if 5 component carriers are allocated as granularity of a carrier unit having a 20 MHz bandwidth, a bandwidth of up to 100 MHz may be supported.

Carrier aggregation can be divided into contiguous carrier aggregation between continuous component carriers in the frequency domain and non-contiguous carrier aggregation between discontinuous component carriers. The number of carriers aggregated between the downlink and the uplink may be set differently. A case in which the number of downlink component carriers and the number of uplink component carriers are the same is called symmetric aggregation, and a case in which the number is different is called asymmetric aggregation.

The size (ie bandwidth) of the component carriers may be different. For example, when 5 component carriers are used for the configuration of the 70 MHz band, 5 MHz component carrier (carrier # 0) + 20 MHz component carrier (carrier # 1) + 20 MHz component carrier (carrier # 2) + 20 MHz component carrier It may be configured as (carrier # 3) + 5MHz component carrier (carrier # 4).

Hereinafter, a multiple carrier system includes a system supporting carrier aggregation (CA). In a multi-carrier system, adjacent carrier aggregation and / or non-contiguous carrier aggregation may be used, and either symmetric aggregation or asymmetric aggregation may be used. A serving cell may be defined as a component frequency band that can be aggregated by carrier aggregation based on a multiple component carrier system. The serving cell includes a primary serving cell (PCell) and a secondary serving cell (SCell). The primary serving cell is one that provides security input and NAS (Non-Access Stratum) mobility information in a radio resource control (RRC) connection or re-establishment state. It means serving cell. Depending on the capabilities of the terminal, at least one cell may be configured to form a set of serving cells together with a primary serving cell, and the at least one cell is referred to as a secondary serving cell. The set of serving cells set for one terminal may consist of only one primary serving cell, or may consist of one primary serving cell and at least one secondary serving cell.

The downlink component carrier corresponding to the primary serving cell is called a downlink primary component carrier (DL PCC), and the uplink component carrier corresponding to the primary serving cell is called an uplink primary component carrier (UL PCC). In addition, in the downlink, the component carrier corresponding to the secondary serving cell is called a downlink sub-element carrier (DL SCC), and in the uplink, the component carrier corresponding to the secondary serving cell is referred to as an uplink sub-element carrier (UL SCC). do. Only one downlink component carrier may correspond to one serving cell, and DL CC and UL CC may correspond together.

2 shows an example of a protocol structure for supporting a multi-carrier system to which the present invention is applied.

Referring to FIG. 2, a common medium access control (MAC) entity 210 manages a physical layer 220 using a plurality of carriers. The MAC management message transmitted on a specific carrier can be applied to other carriers. That is, the MAC management message is a message that can control other carriers including the specific carrier. The physical layer 220 may operate in time division duplex (TDD) and / or frequency division duplex (FDD).

There are several physical control channels used in the physical layer 220. The physical downlink control channel (PDCCH) informs the UE of resource allocation of a paging channel (PCH) and downlink shared channel (DL-SCH) and hybrid automatic repeat request (HARQ) information related to the DL-SCH. The PDCCH may carry an uplink grant informing the UE of resource allocation of uplink transmission. A PCFICH (physical control format indicator channel) informs the UE of the number of OFDM symbols used for PDCCHs and is transmitted every subframe. PHICH (physical hybrid ARQ Indicator Channel) carries an HARQ ACK / NACK signal in response to uplink transmission. That is, the ACK / NACK signal for the uplink data transmitted by the terminal is transmitted on the PHICH. A physical uplink control channel (PUCCH) carries uplink control information such as HARQ ACK / NAK, scheduling request, and CQI for downlink transmission. A physical uplink shared channel (PUSCH) carries an uplink shared channel (UL-SCH). The uplink data transmitted on the PUSCH may be a transport block (trnasport block) which is a data block for UL-SCH. A physical random access channel (PRACH) carries a random access preamble.

A plurality of PDCCHs can be transmitted within a control region, and the terminal can monitor a plurality of PDCCHs. The PDCCH is transmitted on aggregation of one or several consecutive control channel elements (CCEs). CCE is a logical allocation unit used to provide a coding rate according to a state of a radio channel to a PDCCH. The CCE corresponds to a plurality of resource element groups. The format of the PDCCH and the possible number of bits of the PDCCH are determined according to the relationship between the number of CCEs and the coding rate provided by the CCEs.

Control information transmitted through the PDCCH is called downlink control information (DCI). Table 1 below shows DCI according to various formats.

DCI format Explanation 0 Used for scheduling PUSCH (uplink common channel) in an uplink cell One Used for scheduling one PDSCH codeword in one cell 1A Used for simple scheduling of one PDSCH codeword in one cell and random access procedure initialized by PDCCH command 1B Used for simple scheduling of one PDSCH codeword in one cell using precoding information 1C Used for brief scheduling of one PDSCH codeword and notification of MCCH change 1D Used for simple scheduling of one PDSCH codeword in one cell including precoding and power offset information 2 Used for PDSCH scheduling for UE configured in spatial multiplexing mode 2A Used for PDSCH scheduling of a terminal configured with a CDD mode of large delay 2B Used in transmission mode 8 (dual layer transmission, etc.) 2C Used in transmission mode 9 (multi-layer transmission) 2D Used in transmission mode 10 (CoMP) 3 Used for transmission of TPC commands for PUCCH and PUSCH including 2-bit power adjustment 3A Used for transmission of TPC commands for PUCCH and PUSCH with single bit power adjustment 4 Used for scheduling of PUSCH in a multi-antenna port transmission mode cell for uplink

Referring to Table 1, the DCI format is Format 0 for PUSCH scheduling in an uplink cell, Format 1 for scheduling one PDSCH codeword, Format 1A for compact scheduling of one PDSCH codeword, DL- Format 1C for very simple scheduling of SCH, format 2 for PDSCH scheduling in closed-loop spatial multiplexing mode, format 2A for PDSCH scheduling in open-loop spatial multiplexing mode, Format 2B used in Transmission Mode (TM) 8, Format 2C used in Transmission Mode 9, Format 2D used in Transmission Mode 10, Format for transmission of Transmission Power Control (TPC) commands for uplink channels 3 and 3A, format 4 for PUSCH scheduling in multi-antenna port transmission mode for uplink, and the like.

Each field of DCI is sequentially mapped to _n information bits a ₀ to a _n-1 . For example, if DCI is mapped to information bits having a total length of 44 bits, each DCI field is sequentially mapped to a ₀ to a ₄₃ . DCI formats 0, 1A, 3, and 3A may all have the same payload size. DCI formats 0 and 4 may be referred to as an uplink (UL) grant.

On the other hand, cross-carrier scheduling (cross-carrier scheduling) is the resource allocation of the PDSCH transmitted through the other component carriers through the PDCCH transmitted through a specific component carrier and / or other than the component carrier that is basically linked to the specific component carrier This is a scheduling method capable of allocating resources of PUSCH transmitted through other component carriers. That is, the PDCCH and the PDSCH may be transmitted through different DL CCs, and the PUSCH may be transmitted through a UL CC other than the UL CC linked to the DL CC where the PDCCH including the UL grant is transmitted.

When cross-carrier scheduling is performed, the UE can receive scheduling information (UL grant, etc.) through only a specific serving cell (or CC). Hereinafter, a serving cell (or CC) performing cross-carrier scheduling may be referred to as a scheduling cell (or CC), and another serving cell (or CC) to which the scheduling cell (or CC) is scheduled is scheduled. It can be called a (scheduled) cell (or CC). The scheduling cell may be called an ordering cell, and the scheduled cell may also be called a following serving cell.

In such a system supporting cross carrier scheduling, a carrier indicator indicating which DL CC / UL CC PDSCH / PUSCH through which PDCCH provides control information is transmitted is required. The field including the carrier indicator is hereinafter referred to as a carrier indication field (CIF). Hereinafter, if the CIF is set, it may mean that cross-carrier scheduling is set.

The aforementioned cross-carrier scheduling can be divided into downlink cross-carrier scheduling and uplink cross-carrier scheduling. Downlink cross-carrier scheduling refers to a case where a component carrier on which a PDCCH including resource allocation information for PDSCH transmission and other information is transmitted is different from a component carrier on which PDSCH is transmitted. Uplink cross-carrier scheduling refers to a case where a component carrier on which a PDCCH including a UL grant for PUSCH transmission is transmitted is different from a DL component carrier linked with a UL component carrier on which the PUSCH is transmitted.

3 is an example of a radio frame structure to which the present invention is applied. This is an FDD radio frame structure and a TDD radio frame structure.

Referring to FIG. 3, one radio frame includes 10 subframes, and one subframe includes two consecutive slots.

In the case of FDD, there are carriers used for uplink transmission and carriers used for downlink transmission, respectively, and uplink transmission and downlink transmission can be simultaneously performed in one cell.

In the case of TDD, uplink transmission and downlink transmission are always classified temporally based on one cell. Since the same carrier is used for uplink transmission and downlink transmission, the base station and the terminal repeat switching between the transmission mode and the reception mode. In the case of TDD, a special subframe may be provided to provide a guard time for mode switching between transmission and reception. As illustrated, the special subframe may include a downlink part (DwPTS), a protection period (GP), and an uplink part (UpPTS). Accordingly, when referred to as a DL subframe or UL subframe, a special subframe may be included in some cases. The protection period is necessary to avoid interference between the downlink and the uplink, and neither downlink transmission nor uplink transmission is performed during the protection period.

Table 1 shows an example of UL-DL configuration of a radio frame. The uplink-downlink configuration defines a subframe reserved for uplink transmission and a subframe reserved for downlink transmission. That is, the uplink-downlink configuration informs what sub-frames in one radio frame are allocated (or reserved) by uplink and downlink.

In Table 2, D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe, respectively. As shown in Table 2, subframes 0 and 5 are always assigned to downlink transmission, and subframe 2 is always assigned to uplink transmission. As shown in Table 2, the position and number of downlink subframes and uplink subframes in one radio frame are different for each uplink-downlink configuration. Through various uplink-downlink settings, the amount of resources allocated to uplink and downlink transmission can be asymmetrically given. In order to avoid severe interference between downlink and uplink between cells, neighboring cells generally have the same uplink-downlink configuration.

The time point of change from downlink to uplink or the time point of change from uplink to downlink is called a switching point. Switch-point periodicity (Switch-point periodicity) refers to a period in which the uplink subframe and the downlink subframe are switched over the same period, and is 5ms or 10ms. For example, when viewed from the up / down setting 0, D-> S-> U-> U-> U is converted from the 0th to the 4th subframe, and the 5th to the 9th subframe is the same as the previous D -> S-> U-> U-> U. Since one subframe is 1ms, the periodicity at the time of switching is 5ms. That is, the periodicity of the switching point is less than one radio frame length (10 ms), and the switching mode within the radio frame is repeated once.

The uplink-downlink configuration of Table 2 may be transmitted from a base station to a terminal through system information. The base station can inform the UE of the change of the uplink-downlink allocation state of the radio frame by transmitting only the index of the uplink-downlink configuration whenever the uplink-downlink configuration is changed. Alternatively, the uplink-downlink setting may be control information that is commonly transmitted to all terminals in a cell through a broadcast channel as broadcast information.

On the other hand, there is an automatic repeat request (ARQ) among technologies that increase the reliability of wireless communication. ARQ is when a receiver fails to receive a data signal, the transmitter retransmits the data signal. In addition, there is a hybrid automatic repeat request (HARQ) that combines Forward Error Correction (FEC) and ARQ. A receiver using HARQ basically attempts error correction on the received data signal, and determines whether to retransmit using an error detection code. CRC (Cyclic Redundancy Check) may be used as the error detection code. If an error of the data signal is not detected through the CRC detection process, the receiver determines that decoding of the data signal is successful. In this case, the receiver transmits an acknowledgment (ACK) signal to the transmitter. When an error of the data signal is detected through the CRC detection process, the receiver determines that decoding of the data signal has failed. In this case, the receiver sends a NACK (Not-Acknowledgement) signal to the transmitter. The transmitter may retransmit the data signal when the NACK signal is received.

In the uplink HARQ, when the base station transmits a PDCCH including a UL grant for PUSCH transmission of the UE, the UE transmits PUSCH data at a predetermined timing, and the HARQ ACK / NACK for the UE is transmitted through PHICH at a predetermined timing. Refers to a process of repeating a process for a certain period of time until the terminal receives an ACK signal from the base station.

In the case of carrier aggregation or the like, when all FDDs are applied to all serving cells, or when all the same TDD UL / DL settings are applied, the PUSCH timing transmitted from the primary serving cell and the PUSCH timing transmitted from the secondary serving cell are the same. Can be. However, when TDD UL / DL settings of at least two serving cells are different, there may be a difference in PUSCH timing transmitted by the serving cells.

(1) First, the PUSCH transmission timing for the PHICH, that is, when viewed based on the PHICH, the transmission timing of the PUSCH to which the corresponding PHICH indicates ACK / NACK can be expressed as follows.

In the case of FDD, when the PHICH is received by the UE in subframe i, the associated PUSCH transmission is subframe i-4.

In TDD, when a single carrier is set in the terminal or the same TDD UL / DL configuration is applied to all serving cells, when the TDD UL / DL configuration is 1 to 6, PUSCH transmission associated with the PHICH received in the terminal in subframe i The timing is subframe ik. In this case, the value of k follows Table 3 below.

Table 3 relates to an index k value indicating PUSCH timing considered in the current TDD. Here, k indicates that when the UE receives the PHICH in subframe i, the associated PUSCH is transmitted in the UL subframe before k times from subframe #i where the corresponding PHICH is received. For example, when the TDD UL / DL configuration is 1, when the UE receives the PHICH in subframe # 9 (i = 9), the PHICH is associated with the PUSCH transmitted in subframe 3 (ik = 9-6 = 3). Indicates PHICH.

When the TDD UL / DL configuration is 0 and the PHICH received at the UE in subframe i is received from a resource corresponding to an I _PHICH value of 0 (corresponding), the associated PUSCH transmission timing is subframe ik (see Table 3). , When the PHICH is received on a resource whose I _PHICH value corresponds to 1, the associated PUSCH transmission timing is subframe i-6.

Meanwhile, in TDD, if two or more serving cells are configured in the terminal and at least two serving cells have different UL-DL configurations, PUSCH based on UL reference UL / DL configuration Transmission timing is set. Here, the UL reference UL-DL configuration means a UL / DL configuration that is a reference for UL HARQ timing of a corresponding serving cell.

If two or more serving cells are configured in the terminal, at least two serving cells have different UL-DL settings, and the corresponding serving cell is a primary cell (PCell), or the terminal for scheduling of the serving cell If the PDCCH / EPDCCH is not configured to be monitored by another serving cell, the corresponding serving cell sets its UL / DL configuration to UL reference UL-DL configuration.

If the UE is configured with two or more serving cells, at least two serving cells have different UL-DL settings, and the corresponding serving cell is a secondary cell (SCell), and the UE for scheduling of the serving cell When the PDCCH / EPDCCH is set to be monitored by this other serving cell, the UL reference UL / DL configuration for the corresponding serving cell may be represented as in Table 4 below.

In Table 4, based on the other serving cell UL / DL configuration (other serving cell UL / DL configuration), serving cell UL-DL configuration (serving cell UL / DL configuration) pair, UL reference UL-DL for the corresponding serving cell The configuration (UL-reference UL / DL (or UL-DL) configuration) is indicated. For example, if the DL reference UL / DL configuration for a serving cell belongs to a pair of (other serving cell UL / DL configuration, serving cell UL / DL configuration) in Table 4, UL reference UL / for the set 1 UL HARQ timing is applied according to the DL setting.

When the UL reference UL / DL configuration of the serving cell is 1 to 6, the PUSCH transmission timing associated with the PHICH received at the UE in subframe i is subframe ik. In this case, the k value may be in accordance with Table 3 described above. In this case, “TDD UL / DL configuration” of Table 3 is “UL reference UL / DL configuration”. It can refer to ". On the other hand, if the UL reference UL / DL setting of the serving cell is 0, when the I _PHICH value included in the PHICH received by the UE in subframe i is 0, the associated PUSCH transmission timing is subframe ik (see Table 3), When the I _PHICH value is 1, the associated PUSCH transmission timing is subframe i-6.

(2) Next, the PHICH transmission timing for PUSCH transmission, that is, the transmission timing of PHICH indicating ACK / NACK of the corresponding PUSCH when viewed based on PUSCH may be represented as follows.

In the case of FDD, the reception of the PHICH for the PUSCH transmitted by the UE in subframe n (the timing at the base station is subframe n + k _PHICH , where the k _PHICH value is always 4).

In TDD, when a single carrier is set in the terminal or the same TDD UL / DL configuration is applied to all serving cells set in the terminal, the transmission timing of the PHICH for the PUSCH transmitted by the terminal in subframe n is subframe n + k _PHICH , where k _PHICH values are in accordance with Table 5 below.

Table 5 relates to the index k _PHICH value indicating the PHICH timing considered in the current TDD. Here, k _PHICH indicates that when the UE transmits a PUSCH in subframe n, a PHICH indicating ACK / NACK for the corresponding PUSCH is received in a subframe of subframe n + k _PHICH . For example, when the TDD UL / DL configuration is 1, when the UE transmits PUSCH in subframe # 2 (n = 2), the associated PHICH is the UE in subframe # 6 (n + k _PHICH = 2 + 4 = 6). Indicates that it is received.

On the other hand, in TDD, if two or more serving cells are configured in the terminal and at least two serving cells have different UL-DL configurations, PHICH is based on UL reference UL / DL configuration. The reception timing is determined. That is, the reception timing of the PHICH for the PUSCH transmitted by the UE in subframe n of the serving cell is subframe n + k _PHICH , and the k _PHICH value may be in accordance with Table 5 described above. "/ DL configuration (TDD UL / DL configuration)" may refer to "UL reference UL / DL configuration".

(3) In addition, PUSCH transmission timing according to UL grant and / or PHICH reception may be represented as follows. Hereinafter, the reception of the UL grant may mean that a PDCCH / EPDCCH having an uplink DCI format is detected for the corresponding UE.

In the case of FDD, PUSCH transmission according to UL grant (by PDCCH / EPDCCH) and / or PHICH received at the UE in subframe n is performed in subframe n + 4.

In TDD, when a single carrier is set in the terminal or the same TDD UL / DL configuration is applied to all serving cells set in the terminal, the PUSCH transmission timing is as follows.

-TDD UL / DL setting is 1 to 6, normal HARQ operation (i.e., non-subframe bundling operation), detection of PDCCH / EPDCCH with uplink DCI format and / or PHICH transmission is provided When made in frame n, the UE adjusts corresponding PUSCH transmission to subframe n + k according to the PDCCH / EPDCCH and PHICH information. In this case, the value of k follows Table 6 below.

Here, k corresponds to the UL grant (or PDCCH / EPDCCH) and / or the PHICH in the subframe n when the UE receives the UL grant and / or the PHICH in the UL subframe after k times from the received subframe n. Indicates that PUSCH transmission is performed. For example, when the TDD UL / DL configuration is 1, when the UE receives UL gram and / or PHICH in subframe # 1 (n = 1), the corresponding PUSCH transmission is subframe # 7 (n + k = 3) ).

-TDD UL / DL setting is 0, normal HARQ operation, and if PDCCH / EPDCCH and / or PHICH transmission with uplink DCI format for the corresponding UE is detected in subframe n, the PDCCH having uplink DCI format The most significant bit (MSB) of the UL index included in / EPDCCH is set to 1, or in a subframe n = 0 or 5 in a resource in which the _PHICH corresponds to I _PHICH = 0 (in the resource). If received, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, k is in accordance with Table 6 above. If the TDD UL / DL configuration is 0 and the normal HARQ operation, the LSB (least significant bit) of the UL index included in the PDCCH / EPDCCH having DCI format 0/4 in subframe n is set to 1, If a PHICH corresponding to I _PHICH = 1 is received in subframe n = 1 or 6, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. If the TDD UL / DL configuration is 0, and both the MSB and LSB of the UL index included in the PDCCH / EPDCCH with the uplink DCI format are set in subframe n, the UE performs the corresponding PUSCH. The transmission is adjusted to subframe n + k and subframe n + 7. In this case, k is in accordance with Table 6 above.

In TDD, if two or more serving cells are configured in the terminal and at least two serving cells have different UL-DL configurations, the PUSCH transmission timing is as follows.

-UL reference UL / DL configuration is 1 to 6, for a serving cell that is a normal HARQ operation, when the PDCCH / EPDCCH and / or PHICH transmission with the uplink DCI format for the terminal is detected in the subframe n, the terminal Adjusts the corresponding PUSCH transmission to subframe n + k. In this case, k may be in accordance with Table 6 described above. In this case, “TDD UL / DL configuration” in Table 6 is “UL-reference UL / DL configuration”. Can refer to.

-For a serving cell with UL reference UL / DL configuration 0 and normal HARQ operation, if PDCCH / EPDCCH and / or PHICH transmission with uplink DCI format for the corresponding UE is detected in subframe n, uplink DCI format If the MSB of the UL index included in the PDCCH / EPDCCH having 1 is set to 1 or a PHICH is received in a subframe n = 0 or 5 in a resource corresponding to I _PHICH = 0, the UE transmits the corresponding PUSCH Is adjusted to subframe n + k. In this case, k may be in accordance with Table 6 described above. In this case, “TDD UL / DL configuration” in Table 6 is “UL-reference UL / DL configuration”. Can refer to. If the UL reference UL / DL configuration is 0 and a normal HARQ operation is performed, the LSB of the UL index included in the PDCCH / EPDCCH with DCI format 0/4 in subframe n is set to 1 or PHICH If I is received in subframe n = 0 or 5 in a resource corresponding to I _PHICH = 1, or if PHICH is received in subframe n = 1 or 6, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 3) If, for a serving cell with a TDD UL / DL setting of 0, if both MSB and LSB of the UL index included in the PDCCH / EPDCCH having the uplink DCI format are set in subframe n, The UE adjusts the corresponding PUSCH transmission to subframe n + k and subframe n + 7. In this case, k may be in accordance with Table 6 described above. In this case, “TDD UL / DL configuration” in Table 6 is “UL-reference UL / DL configuration”. Can refer to.

According to the above criteria, even in a situation such as carrier aggregation, even if the TDD UL / DL settings between serving cells are different, it is possible to support efficient radio resource use and HARQ operation for each serving cell. However, in recent years, a combined operation technique of an FDD band or a carrier and a TDD band or a carrier is considered, and when applying an existing uplink scheduling / HARQ timing, there is a problem that a plurality of uplink resources may not be utilized.

4 shows an example in which an FDD-TDD combining operation technique to which the present invention is applied is applied.

4, in the case of the legacy TDD terminal 120, the wireless communication service can be received only through the TDD band, and in the case of the legacy FDD terminal 140, the wireless communication service can be received only through the FDD band. On the other hand, FDD-TDD CA-capable terminals (UE, 100) can receive wireless communication services through the FDD band and the TDD band, and simultaneously provide CA-based wireless communication services through the TDD band carrier and the FDD band carrier. Can receive

For the above TDD-FDD combining operation, for example, the following deployment scenarios may be considered.

For example, when the FDD base station and the TDD base station are co-located (for example, CA scenarios 1 to 3), the FDD base station and the TDD base station are not co-located, but as an ideal backhaul. Connected (for example, CA scenario 4).

As another example, when the FDD base station and the TDD base station are not co-located and connected in a non-ideal backhaul (eg, small cell scenarios 2a, 2b, and macro-macro scenarios).

In addition, the following prerequisites may be considered for the TDD-FDD combining operation.

First, UEs supporting the FDD-TDD combining operation can access a legacy FDD single mode carrier and a legacy TDD single mode carrier.

Second, legacy FDD terminals and terminals supporting a TDD-FDD combining operation can camp on and connect to an FDD carrier that is part of the combined FDD / TDD network.

Third, legacy TDD terminals and terminals supporting TDD-FDD combining operation can camp on and connect to a TDD carrier that is part of the combined FDD / TDD network.

Fourth, network architecture enhancement for facilitating FDD-TDD combining operations, such as for non-ideal backhaul, may be considered. However, keeping the minimum network architecture change (keeping) should still be considered because it is key from the operator's point of view.

In addition, the following terminal capabilities may be considered when the terminal supports the TDD-FDD combining operation.

5 is an example of terminal capabilities for a TDD-FDD combining operation to which the present invention is applied.

5, (a) shows that the terminal supports carrier aggregation between the TDD carrier and the FDD carrier, (b) indicates that the terminal supports carrier aggregation between the TDD carrier and the FDD downlink carrier, and (c) It indicates that the UE supports carrier aggregation between a downlink subframe of a TDD carrier and an FDD carrier.

As described above, the UE can support various types of TDD-FDD combining operations, and can also perform simultaneous reception (ie, DL aggregation) on FDD and TDD carriers. Second, FDD and TDD Simultaneous transmission (ie, UL aggregation) may be performed on carriers, and third, simultaneous transmission and reception (ie, full duplex) may be performed on FDD and TDD carriers.

Meanwhile, the terminal may set dual connectivity through two or more base stations among base stations constituting at least one serving cell. The dual connection is an operation in which a corresponding terminal consumes radio resources provided by at least two different network points (eg, macro base station and small base station) in a radio resource control connection (RRC_CONNECTED) mode. In this case, the at least two different network points may be connected by a non-ideal backhaul. At this time, one of the at least two different network points may be called a macro base station (or master base station or anchor base station), and the rest may be called small base stations (or secondary base stations or assisting base stations or slave base stations).

The UE may support a TDD-FDD combining operation when carrier aggregation (CA) and / or dual connectivity are established in the UE as described above. Hereinafter, the present invention will be described based on a case in which a CA is set in a terminal, but the present invention can be applied even when a dual connection is set in a terminal.

Conventional uplink scheduling and HARQ methods support CA cases between carriers having different TDD UL / DL settings, but do not support the above-described TDD-FDD joint operation.

UL scheduling / HARQ timing for a UE configured with a TDD-FDD CA is Rel corresponding to each duplex mode when self-scheduling is configured in the UE (that is, when a scheduling cell and a scheduled cell are the same). -11 Even when UL scheduling / HARQ timing is applied, a peak data rate can be provided to a terminal without a big problem. However, when cross-carrier scheduling is set in the UE (that is, when a PDCCH / EDPCCH) is transmitted through a specific cell is indicated in a carrier indication format (CIF), a plurality of uplink resources may not be utilized. Cannot provide peak data rates. This is because in the Rel 11 standard, a PHICH for indicating PUSCH retransmission is transmitted only through a cell in which an UL grant is transmitted.

6 shows an example of limited UL scheduling on a scheduled cell when cross-carrier scheduling is configured in a terminal in which TDD-FDD CA is configured. FIG. 6 shows a case in which a primary cell (Pcell) is set in the terminal with TDD UL / DL setting 0, and a secondary cell (Scell) is set in the terminal with FDD. It is assumed that the primary serving cell is a scheduling cell and the secondary serving cell is a scheduled cell.

Referring to FIG. 6, G indicates UL grant, H indicates PHICH, P indicates PUSCH, and G / H (G and / or H) of the primary serving cell indicates cross carrier scheduling for the secondary serving cell. In the main serving cell, subframes 0 and 5 are set as DL subframes, and subframes 1 and 6 are set as special subframes. Accordingly, in this case, the G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5, and 6 subframes. In this case, although the secondary serving cell is an FDD-based serving cell, uplink transmission is possible in all subframes, but according to the existing FDD UL scheduling / HARQ timing, subframes 1, 2, 3, 6, 7 In times 8 and 8, PUSCH transmission is not performed, and a peak data rate cannot be provided to the UE. Accordingly, a new UL scheduling / HARQ timing design for a scheduled cell is required for a UE configured with TDD-FDD CA and cross-carrier scheduling.

In designing a new UL scheduling / HARQ timing for a UE configured with TDD-FDD CA and cross-carrier scheduling proposed in the present invention, the following assumptions may be included.

(1) PHICH is transmitted on the serving cell to which the UL grant was transmitted. (From Rel-10)

(2) Synchronized HARQ operation is supported. (From Rel-8)

(3) If there is no PHICH resource, the UE may assume the ACK for the corresponding PUSCH transmission and transmit it to the MAC layer.

(4) Both 10ms synchronous scheduling / HARQ period setting (ex. Current TDD UL / DL settings 1 to 5) and not periodic setting (ex. Current TDD UL / DL settings 0, 6) can be considered. have.

(5) Basically, two inter-band CAs (that is, TDD band and FDD band CA) are considered, but five inter-band CAs can be considered. In this case, a CIF may be indicated such that a specific secondary serving cell among a plurality of secondary serving cells is set as a scheduling cell and some of the others are configured as a scheduled cell.

(6) In terms of terminal capability (capability), first, a terminal capable of supporting both UL / DL aggregation is basically used, and other combinations (ex. TDD DL and FDD UL / DL, TDD UL and FDD UL / DL, TDD UL / DL and FDD DL, etc.) may be considered.

(7) The possibility of limited TDD-FDD CA combination can be considered.

Hereinafter, a UL scheduling / HARQ timing method applicable in the CA situation of each of the TDD UL / DL settings (# 0-6) currently provided and FDD is proposed. When considering the CA scenario between the FDD band and the TDD band, possible combinations are shown in Table 7 below.

Scheduling cell Scheduled Cell TDD UL / DL setting 0 FDD TDD UL / DL setting 1 FDD TDD UL / DL configuration 2 FDD TDD UL / DL configuration 3 FDD TDD UL / DL configuration 4 FDD TDD UL / DL configuration 5 FDD TDD UL / DL configuration 6 FDD FDD TDD UL / DL setting 0 FDD TDD UL / DL setting 1 FDD TDD UL / DL configuration 2 FDD TDD UL / DL configuration 3 FDD TDD UL / DL configuration 4 FDD TDD UL / DL configuration 5 FDD TDD UL / DL configuration 6

Referring to Table 7, when cross-carrier scheduling is set for a terminal in which TDD-FDD CA is set, the scheduling cell may be set to any one of TDD UL / DL settings 0 to 6, and the scheduled cell may be set to FDD. have. Alternatively, the scheduling cell may be set to FDD, and the scheduled cell may be set to any one of TDD UL / DL settings 0 to 6. Hereinafter, it is assumed that the primary serving cell is a scheduling cell and the secondary serving cell is a scheduled cell.

Case 1. TDD (main serving cell = scheduling cell)-FDD (sub-serving cell = scheduled cell) CA

1. TDD UL / DL setting 0 (scheduling cell) -FDD (scheduled cell) CA

Example 1

In the first embodiment, new timing is added while maintaining the existing UL scheduling / HARQ timing of the scheduling cell as much as possible. Subframe 0 of the scheduling cell (main serving cell) of TDD UL / DL configuration 0 may schedule PUSCH transmissions that can be transmitted on two UL subframes of the scheduled cell on one DL subframe. On the other hand, the scheduled cell (sub-serving cell) of the FDD configuration holds four more UL subframes than one scheduling cell in one radio frame. Therefore, in order to schedule more UL subframes of the scheduled cell as described above, additional UL scheduling / HARQ timing is required in each DL subframe 0,1,5,6 on the scheduling cell. This may result in an increase in UL index bits in the UL DCI format. That is, the UL index may be set to 3 bits or more. This is because additional UL grants can be further indicated to two existing UL grants that can be indicated in one DL subframe.

According to the first embodiment, the scheduling cell (main serving cell) of the TDD UL / DL configuration 0 satisfies a specific condition and transmits PUSCHs that can be transmitted on three UL subframes of the scheduled cell as one DL sub You can schedule on a frame. For example, the UL index included in the PDCCH / EPDCCH with the uplink grant is 3 bits or more in size, and when 3 bits of the UL index are set, transmission is performed on 3 UL subframes of the scheduled cell. The transmission of the possible PUSCHs may be scheduled on one DL subframe, in which case three different PUSCH transmission timings may be indicated.

7 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 0. 7 shows a case in which the primary serving cell is a scheduling cell set with TDD UL / DL setting # 0, and the secondary serving cell is a scheduled cell set with FDD.

Referring to FIG. 7, G indicates UL grant, H indicates PHICH, P indicates PUSCH, and G / H (G and / or H) in the primary serving cell indicates cross carrier scheduling for the secondary serving cell, G / H (m) indicates that PUSCH is transmitted in the m-th subframe after G / H is transmitted, and P (m) indicates that UL grant / PHICH for retransmission is transmitted in the m-th subframe after PUSCH is transmitted. Same as below.

In the main serving cell, subframes 0 and 5 are set as DL subframes, and subframes 1 and 6 are set as special subframes. Accordingly, in this case, the G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5, and 6 of the main serving cell. In this case, subframes 0, 1, 5, and 6 of the main serving cell may indicate up to three different PUSCH transmission timings for the secondary serving cell, respectively.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell (ie, subframe 0 of the next radio frame) is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (5) of subframe 5 in the secondary serving cell indicates that of the primary serving cell Subframe 5 + 5 indicates that the corresponding PHICH reception timing. G / H (7) of subframe 0 in the primary serving cell indicates that subframe 0 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell Indicates that subframe 7 + 4 (ie, subframe 1 of the next radio frame) is the corresponding PHICH reception timing.

G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. In the primary serving cell, G / H (7) of subframe 1 indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell of the primary serving cell Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell (that is, subframe 0 of the next radio frame) is the corresponding PUSCH transmission timing, and the next radio in the secondary serving cell P (5) of subframe 0 of the frame indicates that subframe 0 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 5 in the primary serving cell indicates that subframe 5 + 7 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (4) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 6 in the primary serving cell indicates that subframe 6 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the primary serving cell (ie, subframe 0 of the next radio frame) is the corresponding PHICH reception timing.

According to the above method, up to 13 UL HARQ processors are provided, and despite the uplink imbalance of the downlink of the TDD primary serving cell and the uplink of the FDD secondary serving cell, efficient uplink scheduling and HARQ for a UE configured with cross carrier scheduling You can do

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception is shown as an example as follows. Can be.

(1) PUSCH transmission timing for PHICH

-When TDD UL / DL is set to 0 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 8 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 1, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 5, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 6, the associated PUSCH transmission is in subframe i-5.

Meanwhile, the PUSCH transmission timing based on the above-described i value and I _PHICH value is an example, and it is natural that other timing may be indicated by an appointment between the base station and the terminal. That is, I _PHICH for one subframe index Depending on the value, multiple (2 or 3) timings can be indicated, and the I _PHICH presented in this embodiment Matching of values and PUSCH transmission timing is an example, and may have different matching relationships. For example, in the case of subframe i = 0, three (i-7 (= k), i-6, i-5) PUSCH transmission timings may be indicated according to the value of I _PHICH . In this embodiment, I _PHICH = 0, i-7, i _PHICH = 1, i-6, and I _PHICH = 2, i-5, but matching was made by the base station and the terminal. For example, if I _PHICH = 0, i-5 (= k), if I _PHICH = 1, i-6, and if I _PHICH = 2, i-7 may be matched in a different order. . This is the same in the following embodiments.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 9 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-The TDD UL / DL setting of the scheduling cell (or, in the TDD-FDD CA, if the TDD UL / DL setting of the TDD cell is referred to as the UL reference UL / DL setting, the UL reference UL / DL setting, as follows) is 0, In the case of normal HARQ operation, when the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n, 1) if the PDCCH / has UL grant, If the MSB of the UL index (3 bits) included in the EPDCCH is set to 1, or the PHICH is received in subframes 0, 1, 5, or 6 in a resource corresponding to I _PHICH = 0, the UE corresponds PUSCH transmission is adjusted to subframe n + k. In this case, the k value may follow Table 10 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant (hereinafter referred to as the remaining bits) are set to 1, received in subframe 0, or the PHICH is I _PHICH When a resource corresponding to = 2 is received in subframe 0, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 5) If the remaining bits of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 6) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 5, or the PHICH received in subframe 5 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 7) If the remaining bits of the UL index included in the PDCCH / EPDCCH with UL grant are set to 1, received in subframe 5, or PHICH is received in subframe 5 in resources corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 8) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6 or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 9) If the remaining bits of the UL index included in the PDCCH / EPDCCH having a UL grant are set to 1 and received in subframe 6, or a PHICH is received in subframe 6 from a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 10) If a plurality of bits of a UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, the UE transmits the corresponding PUSCH to subframe n + k (where k is in Table 10), n + 5, n + 7. In this case, when the UE performs corresponding PUSCH transmission among subframes n + k, n + 5, and n + 7, the UE transmits the PUSCH based on the UL grant / PHICH reception subframe number and UL index values described above. Can be based on.

However, as an example, it is natural that the PUSCH transmission timing value based on the above-described subframe UL index or I _PHICH value may represent a different value according to an appointment between the base station and the terminal. That is, UL index or I _{PHICH for} one subframe index Depending on the value, multiple (two or three) timings may be indicated, and the UL index or I _PHICH suggested in this embodiment Matching of values and PUSCH transmission timing is an example, and may have different matching relationships. For example, UL index or I _PHICH when subframe i = 0 Depending on the value, three (n + 4 (= k), n + 5, n + 7) PUSCH transmission timings can be indicated, and in this embodiment, when an UL grant is received in a corresponding subframe, UL index If the MSB of 1 is matched by n + 4 when the LSB is 1, n + 5 when the LSB is 1, and n + 7 when the remaining bit is 1, when PHICH is received in the corresponding subframe, n when I _PHICH = 0 +4 and n + 5 when I _PHICH = 1 and n + 6 when I _PHICH = 2, but this matching may be changed differently according to an appointment between the base station and the terminal. For example, if the MSB of the UL index is 1, n + 5 (= k), n + 4 when the LSB is 1, and n + 7 when the remaining bits are 1, may be matched in a different order, and I _PHICH = It may be matched with different combinations, such as n + 5 (= k) for 0, n + 4 for I _PHICH = 1, and n + 7 for I _PHICH = 2. This is the same in the following embodiments.

Meanwhile, the above-described I _PHICH value may be determined according to a certain criterion between the terminal and the base station. The criteria may be that different PUSCH transmission subframes associated with one DL subframe in which UL grant / PHICH are transmitted may have different I _PHICH values. For example, it may be determined as follows based on the timing indexes respectively determined within the three timings (1), (2), and (3) mentioned above.

-If PUSCH is transmitted in subframe 4 or 9, the corresponding PHICH has I _PHICH = 1.

-If a PUSCH is transmitted in subframe 0, 1, 5, or 6, the corresponding PHICH has I _PHICH = 2.

-If the PUSCH transmitted in subframe 2 or 7 is indicated as a PHICH corresponding to I _PHICH = 0, or if the MSB value of the UL index of the UL grant is indicated as PDCCH / EPDCCH set to 1 The PHICH indicating UL HARQ ACK / NACK for PUSCH has I _PHICH = 1.

_-If not, I _PHICH = 0.

Meanwhile, the specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are as follows. Can be represented together. This is a case in which the matching relationship is different when a plurality of PUSCH transmission timing values according to an UL index or an I _PHICH value is obtained for one subframe index in the above-described example.

(1) PUSCH transmission timing for PHICH

-When TDD UL / DL is set to 0 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k follows Table 8 above.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 0, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 5, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 6, the associated PUSCH transmission is in subframe i-5.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 9 above.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 0 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n, 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, 5 in a resource corresponding to I _PHICH = 0 When it is received in, or 6, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 10 above. 2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 3) If the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant (hereinafter referred to as the remaining bits) are set to 1, received in subframe 0, or the PHICH is I _PHICH When received in subframe 0 on a resource corresponding to = 2, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 5) If the remaining bits of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 6) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 5, or the PHICH received in subframe 5 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 7) If the remaining bits of the UL index included in the PDCCH / EPDCCH with UL grant are set to 1, received in subframe 5, or PHICH is received in subframe 5 in resources corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 8) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6 or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 9) If the remaining bits of the UL index included in the PDCCH / EPDCCH having a UL grant are set to 1 and received in subframe 6, or a PHICH is received in subframe 6 from a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 10) If a plurality of bits of a UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, the UE transmits the corresponding PUSCH to subframe n + k (where k is in Table 10), n + 5, n + 7. In this case, when the UE performs corresponding PUSCH transmission among subframes n + k, n + 5, and n + 7, the UE transmits the PUSCH based on the UL grant / PHICH reception subframe number and UL index values described above. Can be based on.

In addition, the above-described I _PHICH value may be determined according to the following criteria, for example, based on the values in the above three timings (1), (2), (3).

-If PUSCH is transmitted in subframe 0, 5, or 6, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframes 1, 4 or 9, the corresponding PHICH has I _PHICH = 2.

-If the PUSCH transmitted in subframe 7 is indicated as a PHICH corresponding to I _PHICH = 0, or if the MSB value of the UL index of the UL grant is indicated as PDCCH / EPDCCH set to 1, the PUSCH is transmitted to the corresponding PUSCH. PHICH indicating UL HARQ ACK / NACK for I _PHICH = 2.

-If the PUSCH transmitted in subframe 2 is indicated as a PHICH corresponding to I _PHICH = 0, or if the MSB value of the UL index of the UL grant is indicated as PDCCH / EPDCCH set to 1, the PUSCH is transmitted to the corresponding PUSCH. PHICH indicating UL HARQ ACK / NACK for I _PHICH = 1.

_-If not, I _PHICH = 0.

Example 2

In the second embodiment, when a specific condition is satisfied, up to three PUSCH transmission timings can be indicated in the subframes 0, 1, and 6 of the scheduling cell, and up to 2 in the subframe # 5. PUSCH transmission timing may be indicated. That is, in the second embodiment, one less G / H timing on the scheduling cell is set compared to the first embodiment. This leads to less UL grant / PHICH overhead. Also, in the second embodiment, since the maximum number of HARQ processes is 12, which is one less than the maximum number of HARQ processors in the first embodiment, there is room for soft buffer utilization of the base station, and through this, a combined gain for PUSCH transmission (combining) gain).

8 shows an example of UL scheduling / HARQ timing according to a second embodiment for a case where the TDD UL / DL setting of the scheduling cell is 0. 8 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL setting 0, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 8, subframes 0 and 5 of the main serving cell are set as DL subframes, and subframes 1 and 6 are set as special subframes. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5 and 6 of the primary serving cell. In this case, subframes 0, 1, and 6 of the primary serving cell can indicate up to three different PUSCH transmission timings for the secondary serving cell, respectively, and subframe 5 of the primary serving cell has up to two subframes for the secondary serving cell. Different PUSCH transmission timings may be indicated.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell (ie, subframe 0 of the next radio frame) is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (5) of subframe 5 in the secondary serving cell indicates that of the primary serving cell Subframe 5 + 5 indicates that the corresponding PHICH reception timing. G / H (6) of subframe 0 in the primary serving cell indicates that subframe 0 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 (ie, subframe 1 of the next radio frame) is the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell indicates that of the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. In the primary serving cell, G / H (7) of subframe 1 indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell of the primary serving cell Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 6 in the primary serving cell indicates that subframe 6 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the primary serving cell (ie, subframe 0 of the next radio frame) is the corresponding PHICH reception timing.

The specific (1) PUSCH transmission timing for PHICH, (2) PHICH transmission timing for PUSCH transmission, and (3) PU Grant transmission timing for UL grant and / or PHICH reception according to the second embodiment are as follows, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL is set to 0 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 11 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 6, the associated PUSCH transmission is in subframe i-4.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 12 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 0 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n, 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, 5 in a resource corresponding to I _PHICH = 0 When it is received in, or 6, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 13 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If bits other than the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1 and received in subframe 0, or the PHICH is from a resource corresponding to I _PHICH = 2 When received in subframe 0, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 5) If the remaining bits of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 6) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 5, or the PHICH received in subframe 5 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 7) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6 or the PHICH received in subframe 6 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 8) If the remaining bits of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1, or received in subframe 6, or the PHICH is received in subframe 6 from a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 9) If a plurality of bits of the UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, the corresponding PUSCH transmission is transmitted through subframe n + k ( Here, k is performed among Table 13), n + 5, n + 6, and n + 7. In this case, the UE performs corresponding PUSCH transmission among subframes n + k, n + 5, n + 6, and n + 7, and the UE is based on the UL grant / PHICH reception subframe number and UL index values described above. It may be based on the transmission timing of PUSCH.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 4 or 9, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframes 2, 5 or 7, the corresponding PHICH has I _PHICH = 2.

-If the PUSCH transmitted in subframe 1 or 6 is indicated as a PHICH corresponding to I _PHICH = 0, or if the MSB value of the UL index of the UL grant is indicated as PDCCH / EPDCCH set to 1 The PHICH indicating UL HARQ ACK / NACK for PUSCH has I _PHICH = 1.

_-If not, I _PHICH = 0.

Third embodiment

According to the third embodiment, up to three PUSCH transmission timings can be indicated in subframes 0 and 5 of the scheduling cell, and up to two PUSCH transmission timings are indicated in subframes 1 and 6, respectively. can do. That is, the third embodiment provides less UL grant / PHICH overhead compared to the first and second embodiments. In the third embodiment, the maximum number of HARQ processes is 12.

9 shows an example of UL scheduling / HARQ timing according to a third embodiment for a case where the TDD UL / DL setting of the scheduling cell is 0. 9 is a case in which the primary serving cell is a scheduling cell set with TDD UL / DL configuration # 0, and the secondary serving cell is a scheduled cell set with FDD.

Referring to FIG. 9, subframes 0 and 5 of the main serving cell are set as DL subframes, and subframes 1 and 6 are set as special subframes. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5 and 6 of the primary serving cell. In this case, subframes 0 and 5 of the primary serving cell can indicate up to three different PUSCH transmission timings for the secondary serving cell, respectively, and subframes 1 and 5 of the primary serving cell each have a maximum of 2 for the secondary serving cell. Different PUSCH transmission timings may be indicated.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (5) of subframe 5 in the secondary serving cell indicates that of the primary serving cell Subframe 5 + 5 indicates that the corresponding PHICH reception timing. G / H (6) of subframe 0 in the primary serving cell indicates that subframe 0 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing.

G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. In the primary serving cell, G / H (7) of subframe 1 indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell of the primary serving cell Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 5 in the primary serving cell indicates that subframe 5 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 6 in the primary serving cell indicates that subframe 6 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL is set to 0 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 14 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 5, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-4.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 15 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL configuration of the scheduling cell is 0 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 5 or 6, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 16 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0 or 5, or the PHICH is subframe 0 in a resource corresponding to I _PHICH = 1 Or, if received at 5, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If bits other than the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1 and received in subframe 0, or the PHICH is from a resource corresponding to I _PHICH = 2 When received in subframe 0, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 5) If the remaining bits of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1, received in subframe 5, or the PHICH is received in subframe 5 in a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 6) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6 or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 7) If a plurality of bits of the UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, the corresponding PUSCH transmission is transmitted through subframe n + k ( Here, k is performed in Table 16), n + 5, n + 6, n + 7. In this case, the UE performs corresponding PUSCH transmission among subframes n + k, n + 5, n + 6, and n + 7, and the UE is based on the UL grant / PHICH reception subframe number and UL index values described above. It may be based on the transmission timing of PUSCH.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframes 2, 4, 7 or 9, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframe 0 or 5, the corresponding PHICH has I _PHICH = 2.

_-If not, I _PHICH = 0.

Example 4

According to the fourth embodiment, up to three PUSCH transmission timings can be indicated in subframes 1, 5, and 6 of the scheduling cell, and up to two PUSCH transmission timings can be indicated in subframe 0, for the scheduled cell. have. That is, the fourth embodiment corresponds to an embodiment in which timing is changed in the second embodiment.

10 shows an example of UL scheduling / HARQ timing according to a fourth embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 0. 10 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL setting 0, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 10, subframes 0 and 5 of the main serving cell are set as DL subframes, and subframes 1 and 6 are set as special subframes. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5 and 6 of the primary serving cell. In this case, subframes 1, 5, and 6 of the primary serving cell may indicate up to 3 different PUSCH transmission timings for the secondary serving cell, respectively, and subframe 0 of the primary serving cell may have up to 2 subframes for the secondary serving cell. Different PUSCH transmission timings may be indicated.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 5 in the secondary serving cell is the primary serving cell Subframe 5 + 6 indicates that the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. In the primary serving cell, G / H (7) of subframe 1 indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell of the primary serving cell Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 5 in the primary serving cell indicates that subframe 5 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 6 in the primary serving cell indicates that subframe 6 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL is set to 0 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 17 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 5, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 6, the associated PUSCH transmission is in subframe i-4.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 18 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL configuration of the scheduling cell is 0 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 5 or 6, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the value of k may follow Table 19 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0 or 5, or the PHICH is subframe 0 in a resource corresponding to I _PHICH = 1 Or, if received at 5, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If bits other than the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1 and received in subframe 1, or the PHICH is from a resource corresponding to I _PHICH = 2 When received in subframe 1, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 5) If the remaining bits of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1, received in subframe 5, or the PHICH is received in subframe 5 in a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 6) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6 or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 7) If the remaining bits of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1, received in subframe 6, or the PHICH is received in subframe 6 in a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 8) If a plurality of bits of a UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, subframe n + k ( Here, k is performed in Table 19), n + 5, n + 6, n + 7. In this case, the UE performs corresponding PUSCH transmission among subframes n + k, n + 5, n + 6, and n + 7, and the UE is based on the UL grant / PHICH reception subframe number and UL index values described above. It may be based on the transmission timing of PUSCH.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 4, 6 or 9, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframe 0, 2 or 7, the corresponding PHICH has I _PHICH = 2.

-If the PUSCH transmitted in subframe 1 is indicated as a PHICH corresponding to I _PHICH = 0, or if the MSB value of the UL index of the UL grant is indicated as PDCCH / EPDCCH set to 1, the PUSCH is transmitted to the corresponding PUSCH. PHICH indicating UL HARQ ACK / NACK for I _PHICH = 1.

_-If not, I _PHICH = 0.

Example 5

According to the fifth embodiment, up to three PUSCH transmission timings may be indicated in subframes 1 and 6 of the scheduling cell, respectively, and up to two PUSCH transmission timings may be indicated in subframes 0 and 5, respectively. Can be. That is, the fifth embodiment corresponds to an embodiment in which timing is changed in the third embodiment.

11 shows an example of UL scheduling / HARQ timing according to a fifth embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 0. 11 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL setting 0, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 11, subframes 0 and 5 of the main serving cell are set as DL subframes, and subframes 1 and 6 are set as special subframes. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5 and 6 of the primary serving cell. In this case, subframes 1 and 6 of the primary serving cell can indicate up to three different PUSCH transmission timings for the secondary serving cell, respectively, and subframes 0 and 5 of the primary serving cell have up to two for the secondary serving cell. Different PUSCH transmission timings may be indicated.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 5 in the secondary serving cell is the primary serving cell Subframe 5 + 6 indicates that the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. In the primary serving cell, G / H (7) of subframe 1 indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell of the primary serving cell Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 6 in the primary serving cell indicates that subframe 6 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) PUSCH transmission timing for the PHICH, (2) PHICH transmission timing for the PUSCH transmission, and (3) PU Grant transmission timing for the UL grant and / or PHICH reception according to the fifth embodiment are as follows, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL is set to 0 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 20 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 6, the associated PUSCH transmission is in subframe i-4.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 21 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 0 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 5 or 6, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 22 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0 or 5, or the PHICH is subframe 0 in a resource corresponding to I _PHICH = 1 Or, if received at 5, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If bits other than the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1 and received in subframe 1, or the PHICH is from a resource corresponding to I _PHICH = 2 When received in subframe 1, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 5) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6, or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 6) If the remaining bits of the UL index included in the PDCCH / EPDCCH having a UL grant are set to 1, received in subframe 6 or PHICH is received in subframe 6 in resources corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 7) If a plurality of bits of the UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, the corresponding PUSCH transmission is transmitted through subframe n + k ( Here, k is performed in Table 22), n + 5, n + 6, n + 7. In this case, the UE performs corresponding PUSCH transmission among subframes n + k, n + 5, n + 6, and n + 7, and the UE is based on the UL grant / PHICH reception subframe number and UL index values described above. It may be based on the transmission timing of PUSCH.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframes 1, 4, 6 or 9, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframe 2 or 7, the corresponding PHICH has I _PHICH = 2.

_-If not, I _PHICH = 0.

Example 6

The sixth embodiment is a timing method designed based on a 10 ms HARQ period. According to the sixth embodiment, up to two PUSCH transmission timings may be indicated in at least two subframes (eg, subframes 0 and 5) of the scheduling cell for the scheduled cell, and at least two of the scheduling cells In subframes (for example, subframes 1 and 6), up to three PUSCH transmission timings may be indicated respectively.

12 shows an example of UL scheduling / HARQ timing according to a sixth embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 0. 12 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL setting 0, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 12, subframes 0 and 5 of the main serving cell are set as DL subframes, and subframes 1 and 6 are set as special subframes. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5 and 6 of the primary serving cell. In this case, subframes 0 and 5 of the primary serving cell can indicate up to 2 different PUSCH transmission timings for the secondary serving cell, and subframes 1 and 6 of the primary serving cell each have up to 3 for the secondary serving cell. Different PUSCH transmission timings may be indicated.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 5 in the secondary serving cell is the primary serving cell Subframe 5 + 5 indicates that the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. In the primary serving cell, G / H (7) of subframe 1 indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (13) of subframe 8 in the secondary serving cell of the primary serving cell Indicates that subframe 8 + 13 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 0 of the next radio frame in the secondary serving cell is Indicates that subframe 0 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 6 in the primary serving cell indicates that subframe 6 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (13) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 13 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL is set to 0 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 23 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 1, the associated PUSCH transmission is in subframe i-13.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 6, the associated PUSCH transmission is in subframe i-13.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 24 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 0 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 5 or 6, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 25 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If bits other than the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1 and received in subframe 1, or the PHICH is from a resource corresponding to I _PHICH = 2 When received in subframe 1, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 5) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 5 or the PHICH received in subframe 5 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 6) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6 or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 7) If the remaining bits of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1, received in subframe 6, or the PHICH is received in subframe 6 in a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 8) If a plurality of bits of a UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, subframe n + k ( Here, k is performed in Table 25), n + 5, n + 6, n + 7. In this case, the UE performs corresponding PUSCH transmission among subframes n + k, n + 5, n + 6, and n + 7, and the UE is based on the UL grant / PHICH reception subframe number and UL index values described above. It may be based on the transmission timing of PUSCH.

Meanwhile, in this case, the I _PHICH value may be determined based on the following criteria, for example, based on the values in the above three timings (1), (2), and (3).

-If PUSCH is transmitted in subframe 0, 2, 5 or 7, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframes 3 or 8, the corresponding PHICH has I _PHICH = 2.

_-If not, I _PHICH = 0.

Example 7

The seventh embodiment is another timing method designed based on a 10ms HARQ period. That is, the seventh embodiment corresponds to an embodiment in which timing is changed in the sixth embodiment.

 13 shows an example of UL scheduling / HARQ timing according to a sixth embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 0. 13 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL setting 0, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 13, subframes 0 and 5 of the main serving cell are set as DL subframes, and subframes 1 and 6 are set as special subframes. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5 and 6 of the primary serving cell. In this case, subframes 0 and 5 of the primary serving cell can indicate up to 3 different PUSCH transmission timings for the secondary serving cell, and subframes 1 and 6 of the primary serving cell each have a maximum of 2 for the secondary serving cell. Different PUSCH transmission timings may be indicated.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 5 in the secondary serving cell is the primary serving cell Subframe 5 + 5 indicates that the corresponding PHICH reception timing. G / H (6) of subframe 0 in the primary serving cell indicates that subframe 0 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 4 is the corresponding PHICH reception timing.

G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. In the primary serving cell, G / H (7) of subframe 1 indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (13) of subframe 8 in the secondary serving cell of the primary serving cell Indicates that subframe 8 + 13 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 0 of the next radio frame in the secondary serving cell is Indicates that subframe 0 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 5 in the primary serving cell indicates that subframe 5 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 6 in the primary serving cell indicates that subframe 6 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (13) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 13 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL is set to 0 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 26 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 2 in subframe i = 0, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-13.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 5, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-13.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 27 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 0 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 5 or 6, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 28 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If bits other than the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1 and received in subframe 0, or the PHICH is from a resource corresponding to I _PHICH = 2 When received in subframe 0, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 5) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 5 or the PHICH received in subframe 5 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 6) If the remaining bits of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1, received in subframe 5, or the PHICH is received in subframe 5 from a resource corresponding to I _PHICH = 2 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 7) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6 or PHICH received in subframe 6 in resources corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 8) If a plurality of bits of a UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, subframe n + k ( Here, k is performed in Table 28), n + 5, n + 6, n + 7. In this case, the UE performs corresponding PUSCH transmission among subframes n + k, n + 5, n + 6, and n + 7, and the UE is based on the UL grant / PHICH reception subframe number and UL index values described above. It may be based on the transmission timing of PUSCH.

Meanwhile, in this case, the I _PHICH value may be determined based on the following criteria, for example, based on the values in the above three timings (1), (2), and (3).

-If PUSCH is transmitted in subframe 0, 2, 5 or 8, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframe 1 or 6, the corresponding PHICH has I _PHICH = 2.

_-If not, I _PHICH = 0.

2. TDD UL / DL Setting 1 (Scheduling Cell) -FDD (Scheduled Cell) CA

In the case of CA between existing TDD cells, all serving cells are assigned to only one UL subframe on each DL subframe, except when the TDD UL / DL configuration is 0 or the UL reference UL / DL configuration is 0. PUSCH transmission was scheduled. However, when setting the CA of the TDD cell and the FDD cell in the terminal and setting the cross-carrier scheduling with the TDD cell as the scheduling cell, one of the scheduling cells is used to schedule all UL subframes of the scheduled cell (FDD cell). UL grant and / or PHICH transmission is required for a plurality of (two or more) UL subframes of a scheduled cell in a DL subframe of. This is because UL subframes for UL grant and PHICH transmission are not present in all subframes in the scheduling cell (TDD cell). This is true not only when the scheduling cell is TDD UL / DL configuration 1, but also when it has other TDD UL / DL configuration. As described above, when a UL grant and / or PHICH for a plurality of (two or more) UL subframes of a scheduled cell is transmitted in one DL subframe of a scheduling cell, an additional indicator is required.

First embodiment (seperate manner)

The scheduling cell of TDD UL / DL configuration 1 may perform downlink transmission in subframes 0, 1, 4, 5, 6, and 9. According to the first embodiment, up to two PUSCH transmission timings may be indicated for at least four subframes of a scheduling cell, for a scheduled cell. The first embodiment is a case of maintaining a 10ms synchronous HARQ period. That is, from the perspective of each HARQ process, the UL HARQ period operates based on 10 ms.

14 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 1. 14 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL setting 1, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 14, subframes 0, 4, 5, and 9 are set as DL subframes, and subframes 1 and 6 are set as special subframes for the main serving cell. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 4, 5, 6, and 9 of the primary serving cell. In this case, subframes 0, 1, 5, and 6 of the primary serving cell can indicate up to two different PUSCH transmission timings for the secondary serving cell, respectively, and subframes 4 and 9 of the primary serving cell are secondary serving cells, respectively. For this, up to one different PUSCH transmission timing may be indicated.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (5) of subframe 5 in the secondary serving cell indicates that of the primary serving cell Subframe 5 + 5 indicates that the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing.

G / H (4) of subframe 4 in the primary serving cell indicates that subframe 4 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 8 in the secondary serving cell is the primary serving cell Indicates that subframe 8 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

 G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 3 of the next radio frame in the secondary serving cell is It indicates that subframe 3 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

For example, description will be given based on P (6) transmitted in subframe 8 of the secondary serving cell. The reception timing of the PHICH corresponding to P (6) becomes subframe 8 + 6 of the main serving cell, and G / H (4) for retransmission is received in subframe 4 of the next radio frame of the main serving cell, and PUSCH The retransmission timing becomes subframe 4 + 4 (= 8) of the next radio frame. Therefore, since one subframe is 1 ms, the HARQ period is 10 ms.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

-TDD UL / DL configuration 1, and when a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the k value may follow Table 29 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-4.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 30 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 1 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (2 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 4, 5, 6 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 31 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 5 or the PHICH received in subframe 5 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 5) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6, or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 6) If both the MSB and the LSB of the UL index included in the PDCCH / EPDCCH having a UL grant are set from subframe n to 1, subframe n + k ( Here, k is adjusted among Table 31), n + 5, n + 6. In this case, when the UE adjusts the corresponding PUSCH transmission among subframes n + k, n + 5, and n + 6, the UE transmits the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. Can be based on.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 0, 2, 5 or 7, the corresponding PHICH has I _PHICH = 1.

_-If not, I _PHICH = 0.

Second embodiment (circular manner)

Unlike the first embodiment, the second embodiment does not maintain a 10ms synchronous HARQ period and has a different period. For example, in case of having 11ms synchronous HARQ period, UL grant is transmitted in subframe 0 of the main serving cell to transmit initial PUSCH transmission in subframe 4, and retransmission of PUSCH (in case of HARQ NACK) of the next radio frame It may be transmitted in subframe 5 (of course, it may be adjusted to be transmitted in subframe 4 of the next radio frame according to scheduling). According to the second embodiment, an HARQ operation may be performed cyclically.

15 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 1. 15 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL setting 1, and the secondary serving cell is a scheduled cell set to FDD.

15, in the main serving cell, subframes 0, 4, 5, and 9 are set as DL subframes, and subframes 1 and 6 are set as special subframes. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 4, 5, 6, and 9 of the primary serving cell. In this case, subframes 0, 1, 5, and 6 of the primary serving cell can indicate up to two different PUSCH transmission timings for the secondary serving cell, respectively, and subframes 4 and 9 of the primary serving cell are secondary serving cells, respectively. For this, up to one different PUSCH transmission timing may be indicated.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 5 in the secondary serving cell indicates that of the primary serving cell Subframe 5 + 5 indicates that the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 7 in the secondary serving cell is the primary serving cell Indicates that subframe 7 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 4 in the primary serving cell indicates that subframe 4 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell is of the primary serving cell. Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 2 of the next radio frame in the secondary serving cell is It indicates that subframe 2 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

 G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

For example, description will be given based on P (7) transmitted in subframe 7 of the secondary serving cell. The reception timing of the PHICH corresponding to P (7) becomes subframe 7 + 7 of the main serving cell, and G / H (4) for retransmission is received in subframe 4 of the next radio frame of the main serving cell, and PUSCH The retransmission timing becomes subframe 4 + 4 (= 8) of the next radio frame. Therefore, since one subframe is 1 ms, the HARQ period is 11 ms.

The specific (1) PUSCH transmission timing for PHICH, (2) PHICH transmission timing for PUSCH transmission, and (3) PU Grant transmission timing for UL grant and / or PHICH reception according to the second embodiment are as follows, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 1 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 32 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if PIHCH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-5.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 33 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 1 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (2 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 4, 5, 6 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the value of k may follow Table 34 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 5 or the PHICH received in subframe 5 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 5) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6, or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 6) If both the MSB and the LSB of the UL index included in the PDCCH / EPDCCH having a UL grant are set from subframe n to 1, subframe n + k ( Here, k is adjusted among Table 34), n + 5, n + 6. In this case, when the UE adjusts the corresponding PUSCH transmission among subframes n + k, n + 5, and n + 6, the UE transmits the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. Can be based on.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframes 1, 4, 6 or 9, the corresponding PHICH has I _PHICH = 1.

_-If not, I _PHICH = 0.

2. TDD UL / DL Setting 2 (Scheduling Cell) -FDD (Scheduled Cell) CA

Example 1

The scheduling cell of TDD UL / DL configuration 2 may perform downlink transmission in subframes 0, 1, 3, 4, 5, 6, 8, and 9. According to the first embodiment, at least two subframes (eg, subframes 1 and 6) of the scheduling cell, for each scheduled cell, up to two PUSCH transmission timings may be indicated. The first embodiment is a case where a 10 ms synchronous HARQ period is maintained. That is, from the perspective of each HARQ process, the UL HARQ period operates based on 10 ms.

16 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 2. FIG. 16 shows a case in which a primary serving cell is a scheduling cell set to TDD UL / DL configuration 2, and a secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 16, subframes 0, 3, 4, 5, 8, and 9 are set as DL subframes, and subframes 1 and 6 are set as special subframes for the main serving cell. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 3, 4, 5, 6, 8 and 9 of the primary serving cell. In this case, subframes 1 and 6 of the primary serving cell can indicate up to two different PUSCH transmission timings for the secondary serving cell, respectively, and subframes 0, 3, 4, 5, 8, and 9 of the primary serving cell are Up to one different PUSCH transmission timing may be indicated for each secondary serving cell.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 1 in the primary serving cell indicates that subframe 1 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 5 in the secondary serving cell is the primary serving cell Subframe 5 + 6 indicates that the corresponding PHICH reception timing. G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing.

G / H (4) of subframe 3 in the primary serving cell indicates that subframe 3 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 7 in the secondary serving cell is the primary serving cell Indicates that subframe 7 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 4 in the primary serving cell indicates that subframe 4 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 8 in the secondary serving cell is the primary serving cell Indicates that subframe 8 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell. Indicates that subframe 9 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 6 in the primary serving cell indicates that subframe 6 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 8 in the primary serving cell indicates that subframe 8 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

 G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 3 of the next radio frame in the secondary serving cell is It indicates that subframe 3 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 2 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 35 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-5.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 36 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 2 and the normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (2 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 3, 4, 5, 6, 8 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 37 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6, or the PHICH received in subframe 6 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 4) If both the MSB and the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set from subframe n to 1, the corresponding PUSCH transmission is transmitted to subframe n + k ( Here, k is adjusted to n + 5). In this case, when the UE adjusts the corresponding PUSCH transmission to subframes n + k and n + 5, the UE may be based on the transmission timing of the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. have.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 1 or 6, the corresponding PHICH has I _PHICH = 1.

_-If not, I _PHICH = 0.

Example 2

Unlike the first embodiment, the second embodiment does not maintain a 10ms synchronous HARQ period and has a different period. For example, according to the second embodiment, it may have an 11 ms synchronous HARQ period. According to the second embodiment, an HARQ operation may be performed cyclically.

17 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 2. FIG. 17 shows a case in which a primary serving cell is a scheduling cell set with TDD UL / DL setting 2, and a secondary serving cell is a scheduled cell set with FDD.

Referring to FIG. 17, in the main serving cell, subframes 0, 3, 4, 5, 8, and 9 are set as DL subframes, and subframes 1 and 6 are set as special subframes. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 3, 4, 5, 6, 8 and 9 of the primary serving cell. In this case, subframes 1 and 6 of the primary serving cell can indicate up to two different PUSCH transmission timings for the secondary serving cell, respectively, and subframes 0, 3, 4, 5, 8, and 9 of the primary serving cell are Up to one different PUSCH transmission timing may be indicated for each secondary serving cell.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 7 of the serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 1 in the primary serving cell indicates that subframe 1 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 5 in the secondary serving cell is the primary serving cell Subframe 5 + 6 indicates that the corresponding PHICH reception timing. G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 6 in the secondary serving cell indicates that of the primary serving cell Indicates that subframe 6 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 3 in the primary serving cell indicates that subframe 3 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 7 in the secondary serving cell is the primary serving cell Indicates that subframe 7 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 4 in the primary serving cell indicates that subframe 4 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell is the primary serving cell. Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 9 in the secondary serving cell indicates that of the primary serving cell Subframe 9 + 7 indicates that the corresponding PHICH reception timing.

G / H (4) of subframe 6 in the primary serving cell indicates that subframe 6 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 8 in the primary serving cell indicates that subframe 8 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

 G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is It indicates that subframe 3 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) PUSCH transmission timing for PHICH, (2) PHICH transmission timing for PUSCH transmission, and (3) PU Grant transmission timing for UL grant and / or PHICH reception according to the second embodiment are as follows, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 2 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 38 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-6.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the value of k _PHICH may follow Table 39 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 2 and the normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (2 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 3, 4, 5, 6, 8 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 40 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6, or the PHICH received in subframe 6 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 4) If both the MSB and the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set from subframe n to 1, the corresponding PUSCH transmission is transmitted to subframe n + k ( Here, k is adjusted to n + 5). In this case, when the UE adjusts the corresponding PUSCH transmission to subframes n + k and n + 5, the UE may be based on the transmission timing of the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. have.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 0 or 5, the corresponding PHICH has I _PHICH = 1.

_-If not, I _PHICH = 0.

3. TDD UL / DL Setting 3 (Scheduling Cell) -FDD (Scheduled Cell) CA

Example 1

The scheduling cell of TDD UL / DL configuration 3 may perform downlink transmission in subframes 0, 1, 5, 6, 7, 8, and 9. According to the first embodiment, at least three subframes (for example, subframes 0, 1, and 9) of the scheduling cell, for each scheduled cell, up to two PUSCH transmission timings may be indicated. The first embodiment is a case where a 10 ms synchronous HARQ period is maintained. That is, from the perspective of each HARQ process, the UL HARQ period operates based on 10 ms.

18 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 3. 18 is a case in which the primary serving cell is a scheduling cell set with TDD UL / DL configuration 3, and the secondary serving cell is a scheduled cell set with FDD.

Referring to FIG. 18, in the main serving cell, subframes 0, 5, 6, 7, 8, and 9 are set as DL subframes, and subframe 1 is set as a special subframe. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5, 6, 7, 8 and 9 of the primary serving cell. In this case, subframes 0, 1, and 9 of the primary serving cell can indicate up to two different PUSCH transmission timings for the secondary serving cell, and subframes 5, 6, 7, and 8 of the primary serving cell are respectively Up to one different PUSCH transmission timing may be indicated for a serving cell.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 0 in the primary serving cell indicates that subframe 0 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 4 is the corresponding PHICH reception timing.

G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. G / H (7) of subframe 1 in the primary serving cell indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (13) of subframe 8 in the secondary serving cell is the primary serving cell Indicates that subframe 8 + 13 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell Indicates that subframe 9 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 6 in the primary serving cell indicates that subframe 6 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 7 in the primary serving cell indicates that subframe 7 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 8 in the primary serving cell indicates that subframe 8 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 3 of the next radio frame in the secondary serving cell is It indicates that subframe 3 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 9 in the primary serving cell indicates that subframe 9 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 5 of the next radio frame in the secondary serving cell is Indicates that subframe 5 + 4 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 3 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 41 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-13.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 9, the associated PUSCH transmission is in subframe i-4.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 42 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 3 and the normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (2 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 5, 6, 7, 8 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 43 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 9 or the PHICH received in subframe 9 in resources corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 5) If both the MSB and the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set from subframe n to 1, the corresponding PUSCH transmission is transmitted to subframe n + k ( Here, k is adjusted among Table 43), n + 6 and n + 7. In this case, when the UE adjusts the corresponding PUSCH transmission among subframes n + k, n + 6, and n + 7, the UE transmits the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. Can be based on.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 5, 6 or 8, the corresponding PHICH has I _PHICH = 1.

_-If not, I _PHICH = 0.

Example 2

According to the second embodiment, at least one subframe (eg, subframe 0) of a scheduling cell, for a scheduled cell, may indicate up to two PUSCH transmission timings, and at least one other subframe (eg, For example, subframe 1) may indicate up to three PUSCH transmission timings. Unlike the first embodiment, the second embodiment does not maintain a 10 ms synchronous HARQ period and has a different period. For example, according to the second embodiment, it may have an 11 ms synchronous HARQ period. According to the second embodiment, an HARQ operation may be performed cyclically.

19 shows an example of UL scheduling / HARQ timing according to a second embodiment for a case where the TDD UL / DL setting of the scheduling cell is 3. 19 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL configuration 3, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 19, subframes 0, 5, 6, 7, 8, and 9 are set as DL subframes, and subframe 1 is set as a special subframe as the main serving cell. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5, 6, 7, 8 and 9 of the primary serving cell. In this case, subframe 0 of the primary serving cell may indicate up to two different PUSCH transmission timings for the secondary serving cell, and subframe 1 of the primary serving cell may transmit up to three different PUSCHs for the secondary serving cell. In addition, subframes 5, 6, 7, 8, and 9 of the primary serving cell may indicate up to one different PUSCH transmission timing for each secondary serving cell.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 5 in the secondary serving cell is the primary serving cell. Subframe 5 + 6 indicates that the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. G / H (7) of subframe 1 in the primary serving cell indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell is the primary serving cell Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 9 in the secondary serving cell is the primary serving cell Subframe 9 + 7 indicates that the corresponding PHICH reception timing.

G / H (4) of subframe 6 in the primary serving cell indicates that subframe 6 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 0 of the next radio frame in the secondary serving cell is Indicates that subframe 0 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 7 in the primary serving cell indicates that subframe 7 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 8 in the primary serving cell indicates that subframe 8 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) PUSCH transmission timing for PHICH, (2) PHICH transmission timing for PUSCH transmission, and (3) PU Grant transmission timing for UL grant and / or PHICH reception according to the second embodiment are as follows, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 3 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 44 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 45 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 3 and the normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 5, 6, 7, 8 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the value of k may follow Table 46 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If the remaining bits except for the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1 or received in subframe 1, or the PHICH is in a resource corresponding to I _PHICH = 2 When received in subframe 1, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 5) If a plurality of bits of the UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, the corresponding PUSCH transmission is transmitted through subframe n + k ( Here, k is adjusted to Table 46), n + 6, n + 7. In this case, when the UE adjusts the corresponding PUSCH transmission among subframes n + k, n + 6, and n + 7, the UE transmits the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. Can be based on.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 4 or 6, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframe 7, the corresponding PHICH has I _PHICH = 2.

_-If not, I _PHICH = 0.

4. TDD UL / DL Setting 4 (Scheduling Cell) -FDD (Scheduled Cell) CA

Example 1

The scheduling cell of TDD UL / DL configuration 4 may perform downlink transmission in subframes 0, 1, 4, 5, 6, 7, 8, and 9. According to the first embodiment, at least two subframes (eg, subframes 0 and 1) of the scheduling cell, for each scheduled cell, up to two PUSCH transmission timings may be indicated. The first embodiment is a case where a 10 ms synchronous HARQ period is maintained. That is, from the perspective of each HARQ process, the UL HARQ period operates based on 10 ms.

20 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 4. 20 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL configuration 4, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 20, in the main serving cell, subframes 0, 4, 5, 6, 7, 8, and 9 are set as DL subframes, and subframe 1 is set as a special subframe. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 4, 5, 6, 7, 8 and 9 of the primary serving cell. In this case, subframes 0 and 1 of the primary serving cell may indicate up to two different PUSCH transmission timings for each secondary serving cell, and subframes 4, 5, 6, 7, 8, and 9 of the primary serving cell may Up to one different PUSCH transmission timing may be indicated for each secondary serving cell.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (5) of subframe 5 in the secondary serving cell indicates that of the primary serving cell Subframe 5 + 5 indicates that the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing.

G / H (4) of subframe 4 in the primary serving cell indicates that subframe 4 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 8 in the secondary serving cell indicates that of the primary serving cell. Indicates that subframe 8 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell Indicates that subframe 9 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 6 in the primary serving cell indicates that subframe 6 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 7 in the primary serving cell indicates that subframe 7 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 8 in the primary serving cell indicates that subframe 8 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 3 of the next radio frame in the secondary serving cell is It indicates that subframe 3 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 4 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 47 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-6.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the value of k _PHICH may follow Table 48 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL configuration of the scheduling cell is 4 and the normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (2 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 4, 5, 6, 7, 8 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 49 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If both the MSB and the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set from subframe n to 1, the corresponding PUSCH transmission is transmitted to subframe n + k ( Here, k is adjusted to n + 5, n + 6). In this case, when the UE adjusts the corresponding PUSCH transmission among subframes n + k, n + 5, and n + 6, the UE transmits the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. Can be based on.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 5 or 7, the corresponding PHICH has I _PHICH = 1.

_-If not, I _PHICH = 0.

Example 2

Unlike the first embodiment, the second embodiment does not maintain a 10 ms synchronous HARQ period and has a different period. For example, according to the second embodiment, it may have an 11 ms synchronous HARQ period. According to the second embodiment, an HARQ operation may be performed cyclically.

21 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 4. 21 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL configuration 4, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 21, in the main serving cell, subframes 0, 4, 5, 6, 7, 8, and 9 are set as DL subframes, and subframe 1 is set as a special subframe. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 4, 5, 6, 7, 8 and 9 of the primary serving cell. In this case, subframes 0 and 1 of the primary serving cell may indicate up to two different PUSCH transmission timings for each secondary serving cell, and subframes 4, 5, 6, 7, 8, and 9 of the primary serving cell may Up to one different PUSCH transmission timing may be indicated for each secondary serving cell.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 5 in the secondary serving cell is the primary serving cell Subframe 5 + 6 indicates that the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 7 in the secondary serving cell is the primary serving cell Indicates that subframe 7 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 4 in the primary serving cell indicates that subframe 4 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell is the primary serving cell. Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 9 in the secondary serving cell is the primary serving cell Subframe 9 + 7 indicates that the corresponding PHICH reception timing.

G / H (4) of subframe 6 in the primary serving cell indicates that subframe 6 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 0 of the next radio frame in the secondary serving cell is Indicates that subframe 0 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 7 in the primary serving cell indicates that subframe 7 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 8 in the primary serving cell indicates that subframe 8 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) PUSCH transmission timing for PHICH, (2) PHICH transmission timing for PUSCH transmission, and (3) PU Grant transmission timing for UL grant and / or PHICH reception according to the second embodiment are as follows, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 4 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 50 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-6.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 51 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL configuration of the scheduling cell is 4 and the normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (2 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 4, 5, 6, 7, 8 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 52 below.

2) If, the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 If it is, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If both the MSB and the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set from subframe n to 1, the corresponding PUSCH transmission is transmitted to subframe n + k ( Here, k is regulated among n + 5 and n + 6). In this case, when the UE adjusts the corresponding PUSCH transmission among subframes n + k, n + 5, and n + 6, the UE transmits the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. Can be based on.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 6, the corresponding PHICH has I _PHICH = 1.

_-If not, I _PHICH = 0.

5. TDD UL / DL Setting 5 (Scheduling Cell) -FDD (Scheduled Cell) CA

Example 1

The scheduling cell of TDD UL / DL configuration 5 may perform downlink transmission in subframes 0, 1, 3, 4, 5, 6, 7, 8, and 9. According to the first embodiment, at least one subframe (eg, subframe 1) of the scheduling cell, for the scheduled cell, up to two PUSCH transmission timings may be indicated. The first embodiment is a case where a 10 ms synchronous HARQ period is maintained. That is, from the perspective of each HARQ process, the UL HARQ period operates based on 10 ms.

22 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 5. 22 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL configuration 5, and the secondary serving cell is a scheduled cell set to FDD.

22, in the main serving cell, subframes 0, 3, 4, 5, 6, 7, 8, and 9 are set as DL subframes, and subframe 1 is set as a special subframe. The G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 3, 4, 5, 6, 7, 8 and 9 of the primary serving cell. In this case, subframe 1 of the primary serving cell can indicate up to two different PUSCH transmission timings for the secondary serving cell, and subframes 0, 3, 4, 5, 6, 7, 8, and 9 of the primary serving cell. Can indicate up to one different PUSCH transmission timing for each secondary serving cell.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 1 in the primary serving cell indicates that subframe 1 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 5 in the secondary serving cell is the primary serving cell Subframe 5 + 6 indicates that the corresponding PHICH reception timing. G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing.

G / H (4) of subframe 3 in the primary serving cell indicates that subframe 3 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 7 in the secondary serving cell is the primary serving cell Indicates that subframe 7 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 4 in the primary serving cell indicates that subframe 4 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 8 in the secondary serving cell indicates that of the primary serving cell. Indicates that subframe 8 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell Indicates that subframe 9 + 6 is the corresponding PHICH reception timing.

G / H (4) of subframe 6 in the primary serving cell indicates that subframe 6 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 7 in the primary serving cell indicates that subframe 7 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 8 in the primary serving cell indicates that subframe 8 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 3 of the next radio frame in the secondary serving cell is It indicates that subframe 3 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 5 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 53 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-5.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 54 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL configuration of the scheduling cell is 5 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (2 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 3, 4, 5, 6, 7, 8 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 55 below.

2) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If both the MSB and the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set from subframe n to 1, the corresponding PUSCH transmission is transmitted to subframe n + k ( Here, k is adjusted to n + 5). In this case, when the UE adjusts the corresponding PUSCH transmission to subframes n + k and n + 5, the UE may be based on the transmission timing of the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. have.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 6, the corresponding PHICH has I _PHICH = 1.

_-If not, I _PHICH = 0.

Example 2

Unlike the first embodiment, the second embodiment does not maintain a 10 ms synchronous HARQ period and has a different period. For example, according to the second embodiment, it may have an 11 ms synchronous HARQ period. According to the second embodiment, an HARQ operation may be performed cyclically.

23 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case in which the TDD UL / DL setting of the scheduling cell is 5. 23 is a case in which the primary serving cell is a scheduling cell set to TDD UL / DL configuration 5, and the secondary serving cell is a scheduled cell set to FDD.

Referring to FIG. 23, in the main serving cell, subframes 0, 3, 4, 5, 6, 7, 8, and 9 are set as DL subframes, and subframe 1 is set as a special subframe. The G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 3, 4, 5, 6, 7, 8 and 9 of the primary serving cell. In this case, subframe 1 of the primary serving cell can indicate up to two different PUSCH transmission timings for the secondary serving cell, and subframes 0, 3, 4, 5, 6, 7, 8, and 9 of the primary serving cell. Can indicate up to one different PUSCH transmission timing for each secondary serving cell.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (7) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 7 of the serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 1 in the primary serving cell indicates that subframe 1 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 5 in the secondary serving cell is the primary serving cell Subframe 5 + 6 indicates that the corresponding PHICH reception timing. G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 6 in the secondary serving cell indicates that of the primary serving cell Indicates that subframe 6 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 3 in the primary serving cell indicates that subframe 3 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 7 in the secondary serving cell is the primary serving cell Indicates that subframe 7 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 4 in the primary serving cell indicates that subframe 4 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell is the primary serving cell. Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 9 in the secondary serving cell is the primary serving cell Subframe 9 + 7 indicates that the corresponding PHICH reception timing.

G / H (4) of subframe 6 in the primary serving cell indicates that subframe 6 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is Indicates that subframe 0 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 7 in the primary serving cell indicates that subframe 7 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 1 of the next radio frame in the secondary serving cell is Indicates that subframe 1 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 8 in the primary serving cell indicates that subframe 8 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) PUSCH transmission timing for PHICH, (2) PHICH transmission timing for PUSCH transmission, and (3) PU Grant transmission timing for UL grant and / or PHICH reception according to the second embodiment are as follows, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 5 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 56 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-6.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 57 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL configuration of the scheduling cell is 5 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (2 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 3, 4, 5, 6, 7, 8 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 58 below.

2) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If both the MSB and the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set from subframe n to 1, the corresponding PUSCH transmission is transmitted to subframe n + k ( Here, k is adjusted to n + 5). In this case, when the UE adjusts the corresponding PUSCH transmission to subframes n + k and n + 5, the UE may be based on the transmission timing of the PUSCH based on the UL grant / PHICH reception subframe number and UL index value described above. have.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 5, the corresponding PHICH has I _PHICH = 1.

_-If not, I _PHICH = 0.

6. TDD UL / DL Setting 6 (Scheduling Cell) -FDD (Scheduled Cell) CA

Example 1

The scheduling cell of TDD UL / DL configuration 6 may perform downlink transmission in subframes 0, 1, 5, 6, and 9. According to the first embodiment, up to two PUSCH transmission timings may be indicated in at least three subframes (eg, subframes 0, 1, and 5) of the scheduling cell for the scheduled cell, and at least one subframe Up to three PUSCH transmission timings may be indicated in (eg, subframe 6), and only one PUSCH transmission timing may be indicated in at least one subframe (eg, subframe 9). The first embodiment is a case of maintaining a 10ms synchronous HARQ period (in this case, some HARQ processes may have a period multiple of 10ms). That is, from the perspective of each HARQ process, the UL HARQ period operates based on 10 ms.

24 shows an example of UL scheduling / HARQ timing according to the first embodiment for a case where the TDD UL / DL setting of the scheduling cell is 6. 24 is a case in which the primary serving cell is a scheduling cell set with TDD UL / DL setting 6, and the secondary serving cell is a scheduled cell set with FDD.

Referring to FIG. 24, subframes 0, 5, and 9 are set as DL subframes, and subframes 1 and 6 are set as special subframes for the main serving cell. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5, 6 and 9 of the primary serving cell. In this case, subframes 0, 1, and 5 of the primary serving cell can indicate up to two different PUSCH transmission timings for the secondary serving cell, respectively, and subframe 6 of the primary serving cell has up to three subframes for the secondary serving cell. Different PUSCH transmission timings may be indicated, and subframe 9 of the primary serving cell may indicate up to one different PUSCH transmission timing for the secondary serving cell.

Specifically, G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (5) of subframe 5 in the secondary serving cell is primary Indicates that subframe 5 + 5 of the serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 0 in the primary serving cell indicates that subframe 0 + 7 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (13) of subframe 7 in the secondary serving cell is the primary serving cell Indicates that subframe 7 + 13 is the corresponding PHICH reception timing.

G / H (5) of subframe 1 in the primary serving cell indicates that subframe 1 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing. In the primary serving cell, G / H (7) of subframe 1 indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (13) of subframe 8 in the secondary serving cell of the primary serving cell Indicates that subframe 8 + 13 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (7) of subframe 5 in the primary serving cell indicates that subframe 5 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (13) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 13 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 6 in the primary serving cell indicates that subframe 6 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (7) of subframe 6 in the primary serving cell indicates that subframe 6 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (13) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 13 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (5) of subframe 9 in the primary serving cell indicates that subframe 9 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 4 of the next radio frame in the secondary serving cell is Indicates that subframe 4 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 6 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 59 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-13.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-13.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-13.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 6, the associated PUSCH transmission is in subframe i-13.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 60 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 6 and the normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 5, 6 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 61 below.

2) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1 and received in subframe 0, or the PHICH is received in subframe 0 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 3) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 5 or the PHICH received in subframe 5 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 5) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6, or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 6) If the remaining bits except for the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1 or received in subframe 6, or the PHICH is in a resource corresponding to I _PHICH = 2 When received in subframe 6, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 7) If a plurality of bits of the UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, the corresponding PUSCH transmission is transmitted through subframe n + k ( Here, k is adjusted among Table 61), n + 5, and n + 7. In this case, when the UE adjusts the corresponding PUSCH transmission among the subframes n + k, n + 5, and n + 7, the UE transmits the PUSCH based on the UL grant / PHICH reception subframe number and UL index values described above. Can be based on.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 2, 7 or 8, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframe 3, the corresponding PHICH has I _PHICH = 2.

_-If not, I _PHICH = 0.

Example 2

According to the second embodiment, up to three PUSCH transmission timings may be indicated in at least one subframe (eg, subframe 0) of the scheduling cell, and at least three subframes (eg, for a scheduled cell) In subframes 1, 5, and 6), up to two PUSCH transmission timings may be indicated. Unlike the first embodiment, the second embodiment does not maintain a 10 ms synchronous HARQ period and has a different period. For example, according to the second embodiment, it may have an 11 ms synchronous HARQ period. According to the second embodiment, an HARQ operation may be performed cyclically.

25 shows an example of UL scheduling / HARQ timing according to the second embodiment for a case where the TDD UL / DL setting of the scheduling cell is 6. FIG. 25 is a case in which a primary serving cell is a scheduling cell set with TDD UL / DL setting 6, and a secondary serving cell is a scheduled cell set with FDD.

Referring to FIG. 25, subframes 0, 5, and 9 are set as DL subframes, and subframes 1 and 6 are set as special subframes for the main serving cell. G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 1, 5, 6 and 9 of the primary serving cell. In this case, subframe 0 of the primary serving cell can indicate up to three different PUSCH transmission timings for the secondary serving cell, and subframes 1, 5, and 6 of the primary serving cell each have a maximum of 2 for the secondary serving cell. Different PUSCH transmission timings may be indicated, and subframe 9 of the primary serving cell may indicate up to one PUSCH transmission timing for the secondary serving cell.

Specifically, G / H (4) of subframe 0 in the primary serving cell indicates that subframe 0 + 4 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (6) of subframe 4 in the secondary serving cell is primary Indicates that subframe 4 + 6 of the serving cell is the corresponding PHICH reception timing. G / H (5) of subframe 0 in the primary serving cell indicates that subframe 0 + 5 of the secondary serving cell is a corresponding PUSCH transmission timing, and P (5) of subframe 5 in the secondary serving cell indicates that of the primary serving cell Subframe 5 + 5 indicates that the corresponding PHICH reception timing. G / H (6) of subframe 0 in the primary serving cell indicates that subframe 0 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 6 in the secondary serving cell is the primary serving cell Indicates that subframe 6 + 5 is the corresponding PHICH reception timing.

G / H (6) of subframe 1 in the primary serving cell indicates that subframe 1 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (4) of subframe 7 in the secondary serving cell is the primary serving cell. Indicates that subframe 7 + 4 is the corresponding PHICH reception timing. In the primary serving cell, G / H (7) of subframe 1 indicates that subframe 1 + 7 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 8 in the secondary serving cell of the primary serving cell Indicates that subframe 8 + 7 is the corresponding PHICH reception timing.

G / H (4) of subframe 5 in the primary serving cell indicates that subframe 5 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 9 in the secondary serving cell is the primary serving cell Indicates that subframe 9 + 6 is the corresponding PHICH reception timing. G / H (5) of subframe 5 in the primary serving cell indicates that subframe 5 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) of subframe 0 of the next radio frame in the secondary serving cell is It indicates that subframe 0 + 6 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (5) of subframe 6 in the primary serving cell indicates that subframe 6 + 5 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (5) of subframe 1 of the next radio frame in the secondary serving cell is It indicates that subframe 1 + 5 of the next radio frame of the main serving cell is the corresponding PHICH reception timing. G / H (6) of subframe 6 in the primary serving cell indicates that subframe 6 + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 2 of the next radio frame in the secondary serving cell is Indicates that subframe 2 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

G / H (4) of subframe 9 in the primary serving cell indicates that subframe 9 + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (7) of subframe 3 of the next radio frame in the secondary serving cell is Indicates that subframe 3 + 7 of the next radio frame of the main serving cell is the corresponding PHICH reception timing.

The specific (1) PUSCH transmission timing for PHICH, (2) PHICH transmission timing for PUSCH transmission, and (3) PU Grant transmission timing for UL grant and / or PHICH reception according to the second embodiment are as follows, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

When the TDD UL / DL configuration is 6 and a PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 62 below.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 0, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 2 in subframe i = 0, the associated PUSCH transmission is in subframe i-5.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 1, the associated PUSCH transmission is in subframe i-4.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 5, the associated PUSCH transmission is in subframe i-6.

-Otherwise, if a PHICH is received in a resource corresponding to I _PHICH = 1 in subframe i = 6, the associated PUSCH transmission is in subframe i-5.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 63 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL setting of the scheduling cell is 6 and normal HARQ operation, the UE detects PDCCH / EPDCCH and / or PHICH transmission with UL grant (uplink DCI format) for the UE in subframe n. , 1) If the MSB of the UL index (3 bits) included in the PDCCH / EPDCCH having the UL grant is set to 1, or the PHICH is a subframe 0, 1, in a resource corresponding to I _PHICH = 0, When received in 5, 6 or 9, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 64 below.

2) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 0, or the PHICH received in subframe 0 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 3) If bits other than the MSB and LSB of the UL index included in the PDCCH / EPDCCH having the UL grant are set to 1 and received in subframe 0, or the PHICH is from a resource corresponding to I _PHICH = 2 When received in subframe 0, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 4) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, or received in subframe 1, or the PHICH is received in subframe 1 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 7. 5) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 5 or the PHICH received in subframe 5 from a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 5. 6) If the LSB of the UL index included in the PDCCH / EPDCCH having the UL grant is set to 1, received in subframe 6 or the PHICH received in subframe 6 in a resource corresponding to I _PHICH = 1 In case, the UE adjusts the corresponding PUSCH transmission to subframe n + 6. 7) If a plurality of bits of the UL index (3 bits) included in the PDCCH / EPDCCH having a UL grant is simultaneously set from subframe n to 1, the corresponding PUSCH transmission is transmitted through subframe n + k ( Here, k is adjusted among Table 64), n + 5, n + 6, and n + 7. In this case, the UE adjusts the corresponding PUSCH transmission among the subframes n + k, n + 5, n + 6, and n + 7, and the UE is based on the UL grant / PHICH reception subframe number and UL index values described above. It may be based on the transmission timing of PUSCH.

Meanwhile, in this case, the I _PHICH value may be determined according to the following criteria as another example.

-If PUSCH is transmitted in subframe 1, 4, 7 or 9, the corresponding PHICH has I _PHICH = 1.

-If PUSCH is transmitted in subframe 5, the corresponding PHICH has I _PHICH = 2.

_-If not, I _PHICH = 0.

Meanwhile, the UL index or I _PHICH related to the HARQ timing described above The values are examples, and in particular, when indicating the timing of transmission of multiple PUSCH or PHICH through one DL subframe, UL index or I _PHICH The relationship between the value and each suggested timing value may be matched differently. In other words, the three timings commonly handled in each of the above-described methods ((1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, (3) PUSCH for UL grant and / or PHICH reception When there are multiple transmission timing relationships associated with one subframe within a transmission timing), the relationship between the timings and the UL index or I _PHICH value may be matched differently.

In addition, the above proposed UL scheduling and HARQ-related timing according to the TDD UL / DL configuration of the TDD cell, but in order to simplify implementation and minimize impact on the standard, for any TDD UL / DL configuration The proposed timing scheme may be applied to other TDD UL / DL configurations with the same criteria. For example, when the TDD UL / DL setting of the scheduling cell is 0, the TDD UL / DL setting of the scheduling cell is 1 to 1 within a range in which the proposed timing scheme for the FDD scheduled cell can be applied as a common criterion. Even in case of 6, it may be applicable for an FDD scheduled cell.

26 is a flowchart illustrating an example of a method for supporting UL HARQ by a UE when carrier aggregation of a TDD cell and an FDD cell is set in the UE and the TDD cell is cross-scheduled to the UE as a scheduling cell. 26 illustrates a case in which carrier aggregation (CA) of a TDD-based serving cell and an FDD-based serving cell is set in a terminal, and the present invention can be applied even when a dual connection is set to a terminal as well as a CA as described above. Can be.

Referring to FIG. 26, the UE sets a carrier aggregation (CA) of a first serving cell based on TDD and a second serving cell based on FDD, and a first serving cell as a scheduling cell, and a second serving cell as a scheduled cell. Carrier scheduling is performed (S2600). For CA establishment with the first serving cell based on the TDD and the second serving cell based on the FDD, the UE may receive carrier aggregation configuration information (TDD-FDD CA) and cross-carrier configuration information from the base station through RRC signaling. . In this case, for example, the first serving cell may be a primary serving cell, and the second serving cell may be a secondary serving cell.

The UE receives the UL grant and / or PHICH for the second serving cell through cross-carrier scheduling in at least one subframe on the first serving cell (S2610). In this case, reception of the UL grant and / or the PHICH is performed based on the PHICH timing for PUSCH transmission described above in the embodiments of the present invention for TDD UL / DL settings 0 to 6 of a TDD cell (scheduling cell). Can be.

The UL grant may include a UL index having a size of 3 bits or more. When three bits of the UL index are set to 1, the UL grant may indicate three different PUSCH transmission timings. When two bits of the UL index are set to 1, the UL grant may indicate two different PUSCH transmission timings.

Or, the UL grant may include a UL index of 2 bits. In this case, when both bits of the UL index are set to 1, the UL grant may indicate two different PUSCH transmission timings.

The UE detects at least one PUSCH transmission timing based on the UL grant and / or the PHICH (S2620). In this case, the detection of the PUSCH transmission timing is based on the timing of PUSCH transmission for UL grant and / or PHICH reception described above in the embodiments of the present invention for TDD UL / DL settings 0 to 6 of a TDD cell (scheduling cell). Can be performed with. In this case, the maximum number of PUSCH transmission timings for the second serving cell detected through the first serving cell may be 10 or more within one radio frame.

The UE transmits the PUSCH to the base station on the second serving cell at the detected PUSCH transmission timing (S2630). Thereafter, the UE may detect the reception timing of the PHICH and / or the UL grant corresponding to the transmitted PUSCH. In this case, the detection of the reception timing of the PHICH corresponding to the transmitted PUSCH and / or the corresponding UL grant is the PUSCH described above in the embodiments of the present invention for the TDD UL / DL settings 0 to 6 of the TDD cell (scheduling cell). It may be performed based on a PHICH timing for transmission.

The UE may receive the corresponding PHICH and / or the corresponding UL grant on the first serving cell according to the detected reception timing, and the PUSCH transmission timing indicated by the corresponding PHICH and / or the corresponding UL grant is indicated. Alternatively, the PUSCH may be retransmitted.

According to the present invention, the UL HARQ process for the second serving cell may have, for example, a synchronous HARQ period of 10 ms, or a synchronization period of a time value other than 10 ms (for example, 11 ms).

27 is a flowchart illustrating an example of a method for supporting UL HARQ by a base station when carrier aggregation of a TDD cell and an FDD cell is set in a terminal and a TDD cell is cross-scheduled to the terminal as a scheduling cell. 27 illustrates a case in which carrier aggregation (CA) of a TDD-based serving cell and an FDD-based serving cell is set in a terminal, and the present invention can be applied even when a dual connection is set to a terminal as well as a CA as described above. Can be.

Referring to FIG. 27, the base station sets carrier aggregation configuration information and a first serving cell on a first serving cell as a scheduling cell to set carrier aggregation (CA) of a first serving cell based on TDD and a second serving cell based on FDD in the UE, and a second serving cell. Cross-carrier scheduling setting information for setting a serving cell as a scheduled cell is generated and transmitted to a terminal (S2700). In order to configure the CA of the first serving cell based on the TDD and the second serving cell based on the FDD, the base station may transmit the carrier aggregation configuration information and the cross carrier configuration information to the terminal through RRC signaling. In this case, for example, the first serving cell may be a primary serving cell, and the second serving cell may be a secondary serving cell.

The base station transmits a UL grant and / or PHICH for the second serving cell to the terminal through cross-carrier scheduling in at least one subframe on the first serving cell (S2710). In this case, the transmission of the UL grant and / or the PHICH is performed based on the PHICH timing for the PUSCH transmission described above in the embodiments of the present invention for the TDD UL / DL settings 0 to 6 of the TDD cell (scheduling cell). Can be.

The base station detects at least one PUSCH reception timing based on the UL grant and / or the PHICH (S2720). In this case, the detection of the PUSCH reception timing is based on the timing of PUSCH transmission for UL grant and / or PHICH reception described above in the embodiments of the present invention for TDD UL / DL settings 0 to 6 of a TDD cell (scheduling cell). Can be performed with. In this case, the maximum number of PUSCH reception timings for the second serving cell detected through the first serving cell may be 10 or more within one radio frame.

The base station receives the PUSCH from the terminal on the second serving cell at the detected PUSCH reception timing (S2730). Subsequently, the base station performs PHICH corresponding to the received PUSCH based on PHICH timing for PUSCH transmission described above in the embodiments of the present invention for TDD UL / DL settings 0 to 6 of a TDD cell (scheduling cell) and / or Alternatively, the transmission timing of the corresponding UL grant may be detected. The base station may transmit the corresponding PHICH and / or the corresponding UL grant on the first serving cell to the detected reception timing, and at the PUSCH reception timing indicated by the corresponding PHICH and / or the corresponding UL grant, The PUSCH may be received again and an HARQ operation may be performed.

According to the present invention described above, when TDD-FDD carrier aggregation (or dual connectivity) is set in the terminal and cross-carrier scheduling is set, UL scheduling / HARQ timing can be efficiently controlled, and a large number of scheduled cells By increasing the uplink resource utilization rate, data transmission efficiency can be improved according to the purpose of performing carrier aggregation (or dual connectivity) in order to satisfy a high data rate demand of the UE.

Case 2. FDD (main serving cell = scheduling cell)-TDD (secondary serving cell = scheduled cell) CA

When the FDD cell is a scheduling cell, even when cross-carrier scheduling is set, since there are DL subframes in all subframes of the FDD cell, there is no restriction on UL grant / PHICH transmission. However, the conventional method does not indicate the HARQ timing for the TDD-FDD CA, and when performing the HARQ operation based on the HARQ timing of the FDD cell, which is a scheduling cell, the UL of the TDD cell, which is a scheduled cell, has an HARQ period of 8 ms. A problem in which timing of subframe transmission and PUSCH transmission does not match may occur. For example, when PUSCH is transmitted in subframe 2 of the TDD cell, which is a scheduled cell of TDD UL / DL configuration 1, the corresponding PHICH can be received in subframe 6 of the FDD cell, which is a scheduling cell, and the PHICH is In the case of indicating NACK, according to the existing method, PUSCH cannot be transmitted because subframe 0 of the next radio frame of the TDD cell is a PUSCH transmission timing, but subframe 0 of the TDD cell is a DL subframe. In addition, even when applying the HARQ timing for the existing TDD inter-cell CA by considering the TDD UL / DL setting of the TDD cell that is the scheduled cell as the UL reference UL / DL setting, the characteristics of the FDD cell, which is the scheduling cell, are not reflected and the FDD cell Even though DL subframes are present in all subframes of, UL grant / PHICH reception for a scheduled cell is performed only in a certain number of subframes, and thus there is a problem in that the load is biased. Accordingly, an optimized HARQ timing (and UL scheduling timing) for a terminal in which a TDD-FDD CA is set and an FDD cell is set as a crosslink carrier scheduling as a scheduling cell is required.

Example 1

In the first embodiment, when the TDD-FDD CA and cross-carrier scheduling are set in the terminal, the FDD cell is a scheduling cell, and the TDD cell is a scheduled cell, UL scheduling / HARQ timing with a 10 ms HARQ period is provided. According to the first embodiment, it has the following features.

PUSCH transmission is performed 4 ms after the UL grant is received.

-6 ms after PUSCH transmission, UL grant and / or PHICH is received.

-After receiving PHICH, PUSCH transmission is performed after 4ms.

28 shows an example of UL scheduling / HARQ timing according to the first embodiment for the case where the scheduling cell is an FDD cell and the scheduled cell is a TDD cell. 28, for example, the primary serving cell is a scheduling cell set to FDD, and the secondary serving cell is a scheduled cell set to TDD UL / DL setting 0. However, this embodiment is not limited to the case where the TDD UL / DL setting of the secondary serving cell is 0.

Referring to FIG. 28, sub-frames 2, 3, 4, 7, 8, and 9 of the secondary serving cell are set as UL sub-frames. The G / H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 3, 4, 5, 8 and 9 of the primary serving cell. G / H (4) received in subframe m in the primary serving cell indicates that subframe m + 4 of the secondary serving cell is the corresponding PUSCH transmission timing, and P (6) received in subframe m in the secondary serving cell is Indicates that the subframe m + 6 of the main serving cell is the corresponding PHICH reception timing.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

-TDD UL / DL configuration of a TDD cell (scheduled cell) (or TDD UL / DL configuration of a TDD cell in the case of TDD-FDD CA is referred to as UL reference UL / DL configuration, UL reference UL / DL configuration, The following is the same.) Is 0 to 6, and when the PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the value of k may follow Table 65 below.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 66 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL configuration of the TDD cell (scheduled cell) is 0 to 6 and normal HARQ operation, the UE transmits PDCCH / EPDCCH and / or PHICH with UL grant (uplink DCI format) for the UE. When it is detected in subframe n, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 67 below.

Example 2

In the second embodiment, a 10 ms HARQ period is provided as in the first embodiment, but the changed UL HARQ timing is provided. According to the second embodiment, it has the following features.

PUSCH transmission is performed 4 ms after the UL grant is received.

-UL grant is received after 6 ms after PUSCH transmission.

-After PUSCH transmission, PHICH is received 4 ms later.

PUSCH transmission is performed after 6 ms after PHICH reception.

29 shows an example of UL scheduling / HARQ timing according to a second embodiment for a case where the scheduling cell is an FDD cell and the scheduled cell is a TDD cell. 29, for example, the primary serving cell is a scheduling cell set to FDD, and the secondary serving cell is a scheduled cell set to TDD UL / DL setting 0. However, this embodiment is not limited to the case where the TDD UL / DL setting of the secondary serving cell is 0.

Referring to FIG. 29, sub-frames 2, 3, 4, 7, 8, and 9 of the secondary serving cell are set as UL sub-frames. G for the secondary serving cell may be transmitted from the base station to the terminal through subframes 0, 3, 4, 5, 8 and 9 of the primary serving cell. H for the secondary serving cell may be transmitted from the base station to the terminal through subframes 1, 2, 3, 6, 7 and 8 of the primary serving cell. H (6) received in subframe m from the primary serving cell indicates that subframe m + 6 of the secondary serving cell is the corresponding PUSCH transmission timing, and G (4) received in subframe m from the primary serving cell is secondary serving The subframe m + 4 of the cell indicates the corresponding PUSCH transmission timing, and the P (4/6) received in the subframe m in the secondary serving cell is the corresponding PHICH reception timing in the subframe m + 4 of the primary serving cell, Indicates that m + 6 of the main serving cell is the reception timing of the corresponding UL grant.

The specific (1) timing of PUSCH transmission for PHICH, (2) timing of PHICH transmission for PUSCH transmission, and (3) timing of PUSCH transmission for UL grant and / or PHICH reception are, for example: Can be represented.

(1) PUSCH transmission timing for PHICH

-TDD UL / DL configuration of a TDD cell (scheduled cell) (or TDD UL / DL configuration of a TDD cell in the case of TDD-FDD CA is referred to as UL reference UL / DL configuration, UL reference UL / DL configuration, The following is the same.) Is 0 to 6, and when the PHICH is received in a resource corresponding to I _PHICH = 0 in subframe i, the associated PUSCH transmission is in subframe ik. Here, the k value may follow Table 68 below.

(2) PHICH transmission timing for PUSCH transmission

-The PHICH transmission timing corresponding to PUSCH transmission in subframe n is n + k _PHICH . Here, the k _PHICH value may follow Table 69 below.

(3) Timing of PUSCH transmission for UL grant and / or PHICH reception

-When the TDD UL / DL configuration of the TDD cell (scheduled cell) is 0 to 6 and the normal HARQ operation, the UE transmits PDCCH / EPDCCH with UL grant (uplink DCI format) for the UE in subframe n. If detected, the UE adjusts the corresponding PUSCH transmission to subframe n + k. In this case, the k value may follow Table 70 below.

-When the TDD UL / DL setting of the TDD cell (scheduled cell) is 0 to 6 and normal HARQ operation, when the PHICH transmission is detected in subframe n, the UE adjusts the corresponding PUSCH transmission to subframe n + k. (adjust). In this case, the k value may follow Table 71 below.

30 is a flowchart illustrating an example of a method of supporting HARQ according to the present invention when carrier aggregation of a TDD cell and an FDD cell is set in a terminal and an FDD cell is set as a scheduling cell. In FIG. 30, the carrier aggregation (CA) of the TDD-based serving cell and the FDD-based serving cell is set in the UE, and the present invention can be applied even when a dual connection is set to the UE as well as the CA as described above. Can be.

Referring to FIG. 30, the UE sets a carrier aggregation (CA) of a first serving cell based on FDD and a second serving cell based on TDD, and a first serving cell as a scheduling cell, and a second serving cell as a scheduled cell. Carrier scheduling is performed (S3000). In order to establish CA with the first serving cell based on the FDD and the second serving cell based on the TDD, the UE may receive carrier aggregation configuration information (TDD-FDD CA) and cross-carrier configuration information from the base station through RRC signaling. . In this case, for example, the first serving cell may be a primary serving cell, and the second serving cell may be a secondary serving cell.

The UE receives the UL grant and / or PHICH for the second serving cell through cross-carrier scheduling in at least one subframe on the first serving cell (S3010). In this case, the reception of the UL grant and / or the PHICH may be performed based on the PHICH timing for PUSCH transmission described above in the embodiments of the present invention when the FDD cell is a scheduling cell and the TDD cell is a scheduled cell. have.

For example, after the PUSCH transmission, UL grant and / or PHICH may be received after 6 ms (or the next 6th subframe).

As another example, UL grant may be received 6 ms after PUSCH transmission, and PHICH may be received 4 ms after PUSCH transmission.

The UE detects at least one PUSCH transmission timing based on the UL grant and / or the PHICH (S3020). In this case, the detection of the PUSCH transmission timing is performed based on the timing of PUSCH transmission for UL grant and / or PHICH reception described above in embodiments of the present invention when the TFDD cell is a scheduling cell and the TDD cell is a scheduled cell. Can be.

For example, PUSCH transmission may be performed after 4 ms (or the next 4th subframe) after receiving the UL grant and / or the PHICH.

As another example, PUSCH transmission may be performed after 4 ms (or the next 4th subframe) after receiving the UL grant, and PUSCH transmission may be performed after 6 ms (or the next 6th subframe) after receiving the PHICH.

The UE transmits the PUSCH to the base station on the second serving cell at the detected PUSCH transmission timing (S3030). Thereafter, the UE may detect the reception timing of the PHICH and / or the UL grant corresponding to the transmitted PUSCH. In this case, detection of the reception timing of the PHICH corresponding to the transmitted PUSCH and / or the corresponding UL grant is performed in the above-described PUSCH transmission in the embodiments of the present invention when the FDD cell is a scheduling cell and the TDD cell is a scheduled cell. It may be performed based on the PHICH timing.

The UE may receive the corresponding PHICH and / or the corresponding UL grant on the first serving cell according to the detected reception timing, and the PUSCH transmission timing indicated by the corresponding PHICH and / or the corresponding UL grant is indicated. Alternatively, the PUSCH may be retransmitted.

31 is a flowchart illustrating an example of a method for supporting HARQ by a terminal when carrier aggregation of a TDD cell and an FDD cell is set in the terminal and the FDD cell is set as a scheduling cell. In FIG. 31, the carrier aggregation (CA) of the TDD-based serving cell and the FDD-based serving cell is set in the terminal, and the present invention is applied even when a dual connection is set to the terminal as well as the CA as described above. Can be.

Referring to FIG. 31, the base station sets carrier aggregation configuration information and a first serving cell on the first serving cell as a scheduling cell to set the carrier aggregation (CA) of the first serving cell based on the FDD and the second serving cell based on the TDD in the UE. Cross-carrier scheduling configuration information for setting a serving cell as a scheduled cell is generated and transmitted to a terminal (S3100). In order to set the CA of the first serving cell based on the FDD and the second serving cell based on the TDD, the base station may transmit the carrier aggregation configuration information and the cross carrier configuration information to the terminal through RRC signaling. In this case, for example, the first serving cell may be a primary serving cell, and the second serving cell may be a secondary serving cell.

The base station transmits a UL grant and / or PHICH for the second serving cell to the terminal through cross-carrier scheduling in at least one subframe on the first serving cell (S3110). In this case, the transmission of the UL grant and / or the PHICH may be performed based on the PHICH timing for PUSCH transmission described above in embodiments of the present invention when the FDD cell is a scheduling cell and the TDD cell is a scheduled cell. have.

For example, after receiving PUSCH, UL grant and / or PHICH may be transmitted after 6 ms (or the next 6th subframe).

As another example, UL grant may be transmitted 6 ms after PUSCH reception, and PHICH may be transmitted 4 ms after PUSCH transmission.

The base station detects at least one PUSCH reception timing based on the UL grant and / or the PHICH (S3120). In this case, the detection of the PUSCH reception timing is performed based on the timing of PUSCH transmission for UL grant and / or PHICH reception described above in the embodiments of the present invention when the TFDD cell is a scheduling cell and the TDD cell is a scheduled cell. Can be.

For example, PUSCH reception may be performed after 4 ms (or the next 4th subframe) after UL grant and / or PHICH transmission.

As another example, PUSCH reception may be performed after 4 ms (or the next 4th subframe) after UL grant transmission, and PUSCH reception may be performed after 6 ms (or the next 6th subframe) after PHICH transmission.

The base station receives the PUSCH from the terminal on the second serving cell at the detected PUSCH reception timing (S3130). Then, the base station, based on the PHICH timing for the PUSCH transmission described above in the embodiments of the present invention when the FDD cell is a scheduling cell and a TDD cell is a scheduled cell, PHICH and / or corresponding to the received PUSCH The transmission timing of the corresponding UL grant can be detected. The base station may transmit the corresponding PHICH and / or the corresponding UL grant on the first serving cell to the detected reception timing, and at the PUSCH reception timing indicated by the corresponding PHICH and / or the corresponding UL grant, The PUSCH may be received again and an HARQ operation may be performed.

32 is a block diagram illustrating a base station and a terminal performing UL scheduling / HARQ operation according to the present invention.

Referring to FIG. 32, the terminal 3200 includes a terminal reception unit 3205, a terminal processor 3210 and a terminal transmission unit 3220. The terminal processor 3210 also includes an RRC processing unit 3211 and a MAC processing unit 3212.

The terminal receiving unit 3205 configures carrier aggregation (CA) information of a first serving cell based on TDD and a second serving cell based on FDD, and setting information on a scheduling method for instructing scheduling of the second serving cell on the first serving cell. The (cross-carrier configuration information) is received from the base station 3250 through RRC signaling.

Alternatively, the terminal receiving unit 3205 may configure carrier aggregation (CA) information of the first serving cell based on the FDD and the second serving cell based on the TDD and cross carrier setting information indicating scheduling of the second serving cell on the first serving cell. Is received from the base station 3250 through RRC signaling.

The RRC processor 3211 analyzes / analyzes the RRC signaling, and based on carrier aggregation configuration information of the first serving cell based on the TDD and the second serving cell based on the FDD, the first serving based on the TDD to the terminal. The carrier aggregation and cross-carrier scheduling of the second serving cell based on cell and FDD are set.

The terminal receiving unit 3205 receives UL grants and / or PHICHs for the second serving cell through cross-carrier scheduling on the first serving cell.

The MAC processor 3212 adjusts the reception timing of the UL grant and / or PHICH, and adjusts the transmission timing of the corresponding PUSCH. In this case, the reception timing of the UL grant and / or the PHICH, and the transmission timing of the corresponding PUSCH may be detected and adjusted according to the criteria proposed in the above-described embodiments of the present invention.

The terminal transmission unit 3220 transmits the PUSCH to the base station 3250 through the second serving cell at the PUSCH transmission timing.

The base station 3250 includes a base station transmission unit 3255, a base station reception unit 3260, and a base station processor 3270. The base station processor 3270 also includes an RRC processing unit 371 and a MAC processing unit 3272.

The RRC processor 3327 generates carrier aggregation configuration information and cross carrier scheduling configuration information of the first serving cell based on TDD and the second serving cell based on FDD. Alternatively, the RRC processing unit 3271 generates carrier aggregation configuration information of the first serving cell based on the FDD and the second serving cell based on the TDD, and cross carrier scheduling configuration information using the first serving cell as a scheduling cell. The RRC processing unit 3271 transmits RRC signaling including the carrier aggregation configuration information to the terminal 3200 through the base station transmission unit 3255. The RRC processing unit 3271 transmits RRC signaling including the cross-carrier scheduling configuration information to the terminal 3200 through the base station transmission unit 3255.

The MAC processing unit 3272 adjusts the transmission timing of the UL grant and / or the PHICH, and adjusts the reception timing of the corresponding first PUSCH. In this case, the transmission timing of the UL grant and / or the PHICH, and the reception timing of the corresponding PUSCH may be detected and adjusted according to the criteria proposed in the above-described embodiments of the present invention.

The base station reception unit 3260 receives the PUSCH from the terminal 3200 on the second serving cell at the PUSCH reception timing.

The MAC processing unit 3272 performs HARQ operation according to whether the PUSCH is successfully received by the base station reception unit 3260.

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 variations 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 spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present invention.

Claims (5)

In a radio communication system supporting carrier aggregation (CA) and cross-carrier scheduling of a first serving cell based on time division duplex (TDD) and a second serving cell based on frequency division duplex (FDD), UL by a base station (uplink) hybrid automatic repeat request (HARQ) support method,
Transmitting, by the base station, information for cross-carrier scheduling between the TDD-based first serving cell and the FDD-based second serving cell to a terminal;
The base station transmitting a UL grant to a first subframe through the first serving cell;
Receiving, by the base station, a PUSCH (Physicla Uplink Shared Channel) in a second subframe through the second serving cell from the terminal; And
And transmitting, by the base station, a PHICH (Physical HARQ Indicator Channel) to a third subframe through the first serving cell.
If the first subframe is subframe n, the second subframe is transmitted in subframe n + 4,
If the third subframe is subframe i, the second subframe is transmitted to subframe i-6,
The first serving cell is a scheduling (scheduling) cell, the second serving cell is a scheduled (scheduled) cell, UL HARQ support method. According to claim 1,
The UL grant includes a UL index having a size of 3 bits or more, and when 3 bits of the UL index are set to 1, the UL grant indicates three different PUSCH transmission timings. , UL HARQ support method. According to claim 2,
When two bits of the UL index are set to 1, the UL grant indicates two different PUSCH transmission timings. According to claim 1,
The UL HARQ process for the second serving cell has a synchronous HARQ period of 10ms, UL HARQ support method. According to claim 1,
UL HARQ process for the second serving cell has a synchronous HARQ period of 11ms, UL HARQ support method.

Images